Journal articles: 'Static Var Compensator (SVC)'

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Chen, JinBo, and WenYu Hu. "MATLAB Simulation Research on Static Var Compensator." E3S Web of Conferences 256 (2021): 01022. http://dx.doi.org/10.1051/e3sconf/202125601022.

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TCR-TSC static reactive power compensator (SVC) is the most widely used in the field of power system reactive power compensation. This type of reactive power compensator can not only compensate the reactive power required in the power system, but also handle the over-compensation problem well. This paper will establish a MATLAB simulation model to simulate the TCR-TSC SVC, focusing on the dynamic reactive power compensation characteristics of the TCR-TSC SVC in suppressing voltage fluctuations. The simulation results show that the TCR-TSC SVC has a better dynamic reactive power compensation effect.

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Guan, Zheng Qiang, and Jun Peng. "Static Var Compensator Technology and its Progress." Advanced Materials Research 179-180 (January 2011): 1374–79. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.1374.

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This paper introduced the fundamental types of Static Var Compensator (SVC) device and its typical circuit structures, analyzed the principles of SVC (TCR type), the typical structures of the main circuits and the corresponding control system, and the main functions of SVC devices. At last, the latest applications of domestic SVC devices in the field of electricity distribution network and the electricity transmission network are introduced.

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Onah, A. J., E. E. Ezema, and I. D. Egwuatu. "An R-L Static Var Compensator (SVC)." European Journal of Engineering Research and Science 5, no. 12 (December 14, 2020): 46–51. http://dx.doi.org/10.24018/ejers.2020.5.12.2253.

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Traditional static var compensators (SVCs) employ shunt reactors and capacitors. These standard reactive power shunt elements are controlled to produce rapid and variable reactive power. Power electronic devices like the thyristor etc. are used to switch them in or out of the network to which they are connected in response to system conditions. There are two basic types, namely the thyristor-controlled reactor (TCR), and the thyristor-switched capacitor (TSC). In this paper we wish to investigate a compensator where the reactor or capacitor is replaced by a series connected resistor and reactor (R-L). The performance equations are derived and applied to produce the compensator characteristics for each of the configurations. Their performances are compared, and the contrasts between them displayed. All three configurations are made to achieve unity power factor in a system.

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Onah, A. J., E. E. Ezema, and I. D. Egwuatu. "An R-L Static Var Compensator (SVC)." European Journal of Engineering and Technology Research 5, no. 12 (December 14, 2020): 46–51. http://dx.doi.org/10.24018/ejeng.2020.5.12.2253.

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Traditional static var compensators (SVCs) employ shunt reactors and capacitors. These standard reactive power shunt elements are controlled to produce rapid and variable reactive power. Power electronic devices like the thyristor etc. are used to switch them in or out of the network to which they are connected in response to system conditions. There are two basic types, namely the thyristor-controlled reactor (TCR), and the thyristor-switched capacitor (TSC). In this paper we wish to investigate a compensator where the reactor or capacitor is replaced by a series connected resistor and reactor (R-L). The performance equations are derived and applied to produce the compensator characteristics for each of the configurations. Their performances are compared, and the contrasts between them displayed. All three configurations are made to achieve unity power factor in a system.

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Liu, Si, Yong Hai Xu, Jin Hao Wang, and Chao Ying Yang. "Compensation Capacity Selection and Performance Improve for SVC." Applied Mechanics and Materials 331 (July 2013): 242–45. http://dx.doi.org/10.4028/www.scientific.net/amm.331.242.

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The industrial application of static VAR compensator (SVC) is becoming more and more widely. It has many outstanding functions, such as respond rapidly for changes, compensate reactive power dynamically, reduce harmonic, suppress voltage fluctuations and flicker, and improve the negative sequence problem. This paper, from the above power quality problems, analyzes SVC capacity selection principle and the compensation effect. Meanwhile, the compensation performance evaluation method for an installed and operational SVC is also given. When device can't achieve the expected compensation effect, some improvement strategies are put forward further more.

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Sh. Aziz, Mothanna, and Ahmed G. Abdullah. "Hybrid control strategies of SVC for reactive power compensation." Indonesian Journal of Electrical Engineering and Computer Science 19, no. 2 (August 1, 2020): 563. http://dx.doi.org/10.11591/ijeecs.v19.i2.pp563-571.

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This article shows a prospective utilizations of flexible AC transmission system (FACTS) controls, like the static VAR compensator (SVC). One of the major motives for setting up an SVC is to recover dynamic voltage controller and thus increase system load aptitude. Static VAR compensator system proposed in this work consists of thyristor switched capacitor and thyristor controlled reactor sets, this style of SVC modelled using MATLAB simulink toolbox. A hybrid genetic algorithm with PI and fuzzy logic controls that used to control and expand the grid performance of the power system. The model results reveal that the Static Var Compensation contribute a decent result in upholding bus voltage after the power network is in an active and steady moment, besides it has a capability of the constancy control. It can totally work as a significant plan of reactive power recompense in power networks.

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Purwoharjono, Purwoharjono Purwoharjono. "Penerapan Metode Gravitational Search Algorithm Menggunakan Static VAR Compensator." Jurnal Sistem dan Teknologi Informasi (JustIN) 10, no. 1 (January 31, 2022): 175. http://dx.doi.org/10.26418/justin.v10i1.50575.

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Penerapan metode Gravitational Search Algorithm (GSA) ini bertujuan memperbaiki profil tegangan tenaga listrik menggunakan Static VAR Compensator (SVC). Penelitian ini dibandingkan hasil simulasi sebelum pemasangan SVC menggunakan metode Newton Raphson (NR) dan sesudah pemasangan SVC menggunakan metode GSA. Lokasi implementasi penelitian ini adalah system kelistrikan Jawa-Bali 500 kV. Hasil simulasi sesudah pemasangan SVC menggunakan metode GSA ini lebih baik dibandingkan dengan hasil simulasi sebelum pemasangan SVC menggunakan metode NR. Hasil simulasi sesudah pemasangan SVC menggunakan metode GSA ini juga, dapat memperbaiki profil tegangan pada system Jawa-Bali 500 kV.

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Hardi, Surya, V. Marpaung, I. Nisja Hariadi, Rohana, and I. Nisja. "Mitigation of voltage sags in distribution line system using static VAR compensator and static synchronous compensator." Journal of Physics: Conference Series 2193, no. 1 (February 1, 2022): 012040. http://dx.doi.org/10.1088/1742-6596/2193/1/012040.

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Abstract Voltage sag is one of the power quality disturbances most frequently by customers because it can cause economic loss for the customers especially industries and commercial customers. The main source of voltage sags are faults in transmission and distribution beside two others namely motor large starting and transformer energizing, both the voltage sags have less effect on the equipment. Voltage sags can cause degradation performance of the equipment, and it depends on the magnitude and the duration. The voltage sags that occur in the power system can be compensated with installed Static VAR compensator (SVC) and Static synchronous compensator (STATCOM) in the distribution system bus. The purpose of the study is to compare both types of the device used to mitigate voltage sags in simulation using Alternative transient program (ATP) software. The voltage sag results from the short circuit faults. The method proposes the installation of the two compensator devices alternatively at one of the IEEE thirteen busses systems. The result shows the STATCOM is better than the SVC to handle mitigation of voltage sags compared with the SVC.

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Karthik, B., Jerald Praveen Arokkia, S. Sreejith, and S. Rangarajan Shriram. "Three Phase Power Flow Incorporating Static Var Compensator." Applied Mechanics and Materials 573 (June 2014): 747–56. http://dx.doi.org/10.4028/www.scientific.net/amm.573.747.

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Application of Flexible AC Transmission Systems (FACTS) devices in a power system is a promising and more efficient way for the transfer and control of bulk amount of power. One of the problems encountered in power-systems operation is the generation of unbalanced voltages and currents in the presence of long transmission lines with few or no transpositions. This includes possible unbalances arising in source and load conditions, or indeed any items of plant such as shunt and series reactors. To improve or investigate these unbalance effects in any detail, a 3-phase load-flow solution that allows representation of all possible unbalances as they exist in the power-systems network without making any assumptions is essential. This paper deals with the three phase power flow incorporating Static Var Compensator (SVC). Here SVC is modeled using variable reactance modeling technique and incorporated into the single phase and three phase load flow. Newton Raphson power flow algorithm is adopted here. The performance of SVC to control the power flow and regulating voltage in the network is discussed. The performance analysis is carried out for 4 case studies namely single phase power flow, single phase power flow with SVC, three phase power flow and three phase power flow with SVC. The change in power flow and losses due to the unbalanced load condition in the three phases in illustrated. The studies are carried out in a standard 5 bus test system. Keywords: Three Phase Power flow, Static Var Compensator, Unbalanced system, Negative sequence components, Zero sequence components.

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Zheng, Wei, Li Guang Shi, Shi Qun Li, Yong Zhi, Run Qing Bai, Chen Liang, and Jian Ru Wan. "Research on MCR Type Static Var Power Compensator Device in Wind Farms." Applied Mechanics and Materials 433-435 (October 2013): 1325–29. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1325.

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With the application of FACTS devices in large-scale new energy base, in the light of FACTS devices installed in each wind farm in Gansu Jiuquan, which can supply reactive compensation for the power transmission system and stable the grid voltage, in this paper the magnetic controllable reactor (MCR) type static var compensator (SVC) is studied deeply. The paper introduces the working principle and characteristics of the MCR-SVC. In connection with MCR equivalent circuit, the simulation model is built in MATLAB/SPS, the simulation results and field tests verify the reactive power compensation effect of MCR-SVC during wind farms.

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Djagarov, Nikolay, Zhivko Grozdev, and Milen Bonev. "Improvement the work effectivenes of static var compensators by using of two-input adaptive controllers." Scientific Journal of Riga Technical University. Power and Electrical Engineering 25, no. 25 (January 1, 2009): 97–102. http://dx.doi.org/10.2478/v10144-009-0021-3.

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Improvement the work effectivenes of static var compensators by using of two-input adaptive controllersIn the paper is suggested a two-input adaptive controller for control of static var compensator (SVC). The controlling system of adaptive controller is identifying in real time of the basis for estimated parameters and variables of identification model and after that controlling signal is created for the compensator. As result of this controlling is improving vastly damping of power system like all performances as in transient processes as in steady state mode are improved.

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Wu, Chi Jui, Yu Wei Liu, and Shou Chien Huang. "Reactive Power Compensation for Unbalanced Fluctuating Loads by Using Two-Dimensional Space Vector and a Static Var Compensator." Applied Mechanics and Materials 533 (February 2014): 397–400. http://dx.doi.org/10.4028/www.scientific.net/amm.533.397.

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To modify the power factor and balance the three-phase currents simultaneously, this paper proposes the instantaneous compensator to calculate the compensation current. The instantaneous compensator utilizes two-dimensional instantaneous space vector and setting the active power as a constant for each cycle which can improve power quality effectively. Moreover, the instantaneous compensator requires an independent power source, whose capacity can be reduce by using a static var compensator (SVC). An SVC does not interfere with the capability of the instantaneous compensator. Field measurement data were analyzed. Simulation results confirmed the feasibility of correcting the power factor and balancing load currents simultaneously using the proposed method.

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Wang, Hui Yu, Yong Zhang, and Jian Zhang. "Study on Real-Time Control of Power System Stability." Applied Mechanics and Materials 511-512 (February 2014): 1137–40. http://dx.doi.org/10.4028/www.scientific.net/amm.511-512.1137.

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This paper presents the design method Delays affect static var compensator WAN additional damping controller, containing static var compensator new power system, for example, through a controlled modal analysis to select Static Analysis conventional additional damping drawing's power compensator WAN input signal is calculated using the residue method to get its parameters, and then analyzed using delay-dependent stability criterion of conventional reactive power compensator damping controller contains additional stationary Delay power system stability, finalized the SVC gain additional damping controller based on delay stability analysis, the results show Delay Considered static var compensator additional damping controller not only can improve the damping characteristics of the system, but also has a certain time lag robustness.

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Nasir, S. C. Mohd, M. H. Mansor, I. Musirin, M. M. Othman, T. M. Kuan, K. Kamil, and M. N. Abdullah. "Multistage artificial immune system for static VAR compensator planning." Indonesian Journal of Electrical Engineering and Computer Science 14, no. 1 (April 1, 2019): 346. http://dx.doi.org/10.11591/ijeecs.v14.i1.pp346-352.

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Interconnected network of transmission and distribution lines lead to losses in the system and weakening the voltage stability in the system. Installing Static VAR Compensator (SVC) in power system has known to improve the system by minimizing the total loss and improve the voltage profile of the system. This paper presents the application of Multistage Artificial Immune System (MAIS) technique to determine optimal size of SVC. The performance of this technique is tested on the IEEE 14-Bus Reliability Test System (RTS). The optimization results show that the proposed Multistage Artificial Immune System (MAIS) technique gives better solution of SVC compensator planning problem compared to single stage Artificial Immune System (AIS) in terms of lower total system loss and improved minimum voltage magnitude.

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Keshta, H. E., A. A. Ali, E. M. Saied, and F. M. Bendary. "Application of Static Var Compensator (SVC) With PI Controller for Grid Integration of Wind Farm Using Harmony Search." International Journal of Emerging Electric Power Systems 17, no. 5 (October 1, 2016): 555–66. http://dx.doi.org/10.1515/ijeeps-2016-0159.

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Abstract Large-scale integration of wind turbine generators (WTGs) may have significant impacts on power system operation with respect to system frequency and bus voltages. This paper studies the effect of Static Var Compensator (SVC) connected to wind energy conversion system (WECS) on voltage profile and the power generated from the induction generator (IG) in wind farm. Also paper presents, a dynamic reactive power compensation using Static Var Compensator (SVC) at the a point of interconnection of wind farm while static compensation (Fixed Capacitor Bank) is unable to prevent voltage collapse. Moreover, this paper shows that using advanced optimization techniques based on artificial intelligence (AI) such as Harmony Search Algorithm (HS) and Self-Adaptive Global Harmony Search Algorithm (SGHS) instead of a Conventional Control Method to tune the parameters of PI controller for SVC and pitch angle. Also paper illustrates that the performance of the system with controllers based on AI is improved under different operating conditions. MATLAB/Simulink based simulation is utilized to demonstrate the application of SVC in wind farm integration. It is also carried out to investigate the enhancement in performance of the WECS achieved with a PI Controller tuned by Harmony Search Algorithm as compared to a Conventional Control Method.

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Kecojević, Katarina, Ognjen Lukačević, and Martin Ćalasan. "Impact of Static Var Compensator (SVC) Devices on Power System Losses." B&H Electrical Engineering 13, no. 1 (December 1, 2019): 50–55. http://dx.doi.org/10.2478/bhee-2019-0006.

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Abstract The aim of this paper is to investigate the effect of the location of the SVC installation on the amount of power losses in the power system. The IEEE modified system with 3 wind turbines and 24 nodes was used as the test system. For the purpose of discovering the optimal location of the SVC device, GAMS programme was used. Comparing the results for losses before and after setting SVC to the optimum position in order to minimize losses, it was concluded that the position and power of the SVC device greatly influence the amount of losses in the system.

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Rao, B. Venkateswara, G. V. Nagesh Kumar, R. V. S. Lakshmi Kumari, and M. Vinay Kumar. "Effect of Advanced Static VAR Compensator on Control of Power System Load Shedding." Advanced Materials Research 403-408 (November 2011): 4867–72. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.4867.

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This paper investigates the effect of Static VAR Compensator (SVC) on power system load shedding. SVC is mainly used in power system stability improvement. This paper proposes a new use of SVC to reduce load shedding. An algorithm of Newton Raphson method (NR) to reduce the load shedding for installing SVC in the system is proposed in this paper. 5 bus test system example is used to demonstrate the effect on load shedding. The test results show that the effect of SVC is significant, in this Static VAR compensator (SVC) is incorporated in Newton Raphson method in which Power Flow Solution is a solution of the network under steady state conditions subjected to certain constraints under which the system operates. The power flow solution gives the nodal voltages and phase angles given a set of power injections at buses and specified voltages at a few, the model of SVC i.e. SVC Susceptance model is discussed. It is also shown that the power system losses are decreased after incorporating the SVC in this N-R method. The results are generated for 5-Bus system. By incorporating the SVC the amount of load shedding is reduced to get the voltages in their limits.

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Sheikh, Aafreen S. "Reactive Power Compensation and Power Factor Correction by using Static VAR Compensator (SVC)." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 30, 2021): 4034–36. http://dx.doi.org/10.22214/ijraset.2021.36061.

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In this paper, a reactive power compensation system using static VAR compensator is presented. To confine on system stability and reliability, the reactive power compensation is the fundamental way forflexible AC transmission systems (FACTS). The variations of reactive power have an effect on thegenerating units, lines, circuit breakers, transformers, relays, and isolators. It can also cause effective voltage sags and increase losses. In the proposed system, the lead time between voltage pulse and curren pulse is measured and fed to the interrupt pins of the microcontroller where the program takes over to bring the shunt capacitors to the circuit to get the reactive power compensated. Back-to-back SCRs interfaced through optical isolation from the microcontroller are used in parallel for controlling the capacitor.

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Rao, B. Venkateswara, G. V. Nagesh Kumar, R. V. S. Lakshmi Kumari, and M. Vinay Kumar. "Improvement of Power System Security under Network Contingency with Static VAR Compensator." Advanced Materials Research 403-408 (November 2011): 2073–78. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.2073.

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SVC is incorporated in Newton Raphson method in which Power Flow Solution is a solution of the network under normal operation as well as network contingency, the model of SVC i.e. SVC Susceptance Model is discussed. Newton Raphson Power flow method has been developed for the steady behavior of large complex power systems, it allows the study of power flow under abnormal conditions as well as normal conditions. It is shown that how the system power losses are decreased after incorporating the SVC in this model. It is also shown that how the SVC is useful in network contingency. The results are generated for 5-Bus system.

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Rabyi, Kaoutar, and Hassane Mahmoudi. "Analysis and Impact of D-STATCOM, Static Var Compensator, Fuzzy Based SVC Controller on the Stability of a Wind Farm." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 2 (June 1, 2017): 935. http://dx.doi.org/10.11591/ijpeds.v8.i2.pp935-944.

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In recent years, applications of facts systems have been developed for the compensation of active and reactive power. Facts systems are electronics devices that are connected to the wind farm. This paper presents the impacts of some of these devices on the stability of a wind farm, especially D-STATCOM, Static Var Compensator and Fuzzy SVC controller. First, a presentation of D-STATCOM, SVC, then fuzzy logic controller. In simulation study, the D-STATCOM ensures the stability of the voltage and current at the point of connection with the electrical grid. Finally, Comparing the SVC to the F-SVC simulations, we notice that the F-SVC is more performed than SVC for the compensation of the active and reactive power.

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Qiao, Min Rui, Lin Lin Wu, and Yue Qiao Li. "Research on Transient Stability of Wind Farms Based on Coordinated System of SVS and STATCOM." Applied Mechanics and Materials 740 (March 2015): 397–400. http://dx.doi.org/10.4028/www.scientific.net/amm.740.397.

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As large-scale wind farms are connected to the grid, a single type compensator cannot meet the demand. STATCOM has ability of rapid reaction and harmonics suppression, SVC can compensate large capacity reactive power. In this study, a compensator, which is able to coordinate Static Var System (SVS) with STATCOM is proposed. Large-scale wind power integration is simulated respectively with the compensator of STATCOM alone and coordinated compensator of SVS and STATCOM by DIgSILENT/Powerfactory15.0. Simulations results clearly verify that the compensator of SVS and STATCOM improves transient stability and performance of the photovoltaic systems.

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Hu, Yu Lin, Lei Shi, and Hao Ming Liu. "Using Dynamic Reactive Power Compensation Equipments to Enhance Low Voltage Ride-Through Capability of Fixed Speed Asynchronous Wind Farms." Applied Mechanics and Materials 291-294 (February 2013): 481–89. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.481.

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This paper presents wind energy conversion model, drive shaft’s dual-mass model and generator’s transient mathematical model for the transient analysis of fixed speed asynchronous wind generators, and analyzes the transient characteristics of the wind generators under the condition of low voltage fault. The control principles of two dynamic reactive power compensation equipments as static var compensator (SVC) and static synchronous compensator (STATCOM) are introduced. Take a wind farm consists of fixed speed asynchronous wind generators as an example, the two compensation equipments are simulated in PowerFactory/DIgSILENT to compare the effort of them on enhancing the low voltage ride-through capability of the wind farm.

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Damjanović, Ivana, Frano Tomašević, Ivica Pavić, Božidar Filipović-Grčić, and Alan Župan. "Harmonic Performance Analysis of Static Var Compensator Connected to the Power Transmission Network." Journal of Energy - Energija 67, no. 2 (June 2, 2022): 13–22. http://dx.doi.org/10.37798/201867276.

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The static var compensator (SVC) is a device which is designed to compensate reactive power, increase voltage stability and to reduce voltage fluctuations. Thyristor controlled reactors (TCRs) are composed of reactors in series with bidirectional pair of thyristors. Current through reactors can be continuously controlled by changing the firing angle of thyristor valves, thus the inductive power can be easily controlled. Typical applications of TCRs in AC systems are voltage stabilization and temporary overvoltage reduction, stability improvement, damping of power oscillations and load balancing. In this paper, harmonic performance analysis of SVC equipped with TCRs is presented. SVCs utilizing TCRs generate harmonic currents and therefore it is necessary to determine the effect of harmonics generated by the SVC on the power system and its elements. This includes interaction of the SVC with the system, the SVC performance under balanced and unbalanced operating conditions and finally, evaluation of countermeasures such as installation of harmonic filters. In order to carry out these analysis, it is necessary to determine harmonic characteristics of the network at the point of SVC connection, existing levels of harmonics, and to know appropriate standards regarding acceptable harmonic levels in the power system. Since harmonic distortions in the system are caused by the interaction between SVC and the system, all system contingencies which may affect system’s frequency response should be evaluated. Detailed power system model should be considered to make sure that parallel resonance points of system do not directly coincide with characteristic harmonics from the SVC. Harmonics generated by SVCs are largely dependent on the operating point within the SVC characteristic. A conservative approach is to use the maximum values of harmonics generated within the spectrum irrespective of the operating point. The results of harmonic performance analysis are important for appropriate design of SVC. Harmonic performance analysis related to SVC application which are presented in this paper include the determination of: frequency response of the transmission network impedance required for the specification and design of filters; the effects of SVC generated harmonics on the power system; the overall filter requirements and countermeasures to reduce harmonics to acceptable levels.

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Rahmansyah, Aldi Rahmansyah, Awan Uji Krismanto, and Irrine Budi Sulistiawati. "Analisis Dinamis dan Statis Pada Sistem Tenaga Listrik Sumbawa Akibat Penambahan Static Var Compensator Kapasitas 4 Mvar." Journal of Applied Smart Electrical Network and Systems 3, no. 01 (June 30, 2022): 1–8. http://dx.doi.org/10.52158/jasens.v3i01.333.

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Kestabilan tegangan mengacu pada kemampuan sistem tenaga dalam mempertahankan tegangannya untuk stabil di semua bus dalam sistem setelah mengalami gangguan. Ketika gangguan pada sistem meningkatkan permintaan dari daya reaktif di luar kapasitas sumber yang tersedia maka kestabilan tegangan terancam, skenario terburuknya adalah tegangan turun dibawah level tegangan yang ditentukan. Salah satu perangkat modern yang dapat mengkompensasi konsumsi daya reaktif pada sistem dan mampu menjaga tegangan bus pada tingkat yang diinginkan adalah SVC. Studi kasus dalam penelitian ini yaitu pada Kelistrikan Sumbawa di Gardu Induk Alas 20 kV, Sistem Kelistrikan Sumbawa ini dimodelkan menggunakan perangkat lunak DIgSILENT PowerFactory. Penelitian ini bertujuan untuk menyelidiki pengaruh sebelum dan sesudah pemasangan SVC di Gardu Indu Alas 20 kV terhadap gangguan di Bus Gardu Induk Alas sisi 70 kV. Analisis kestabilan tegangan menggunakan metode kurva P-V, dan respon tegangan sistem studi dinamik sebelum dan sesudah pemasangan SVC. Hasil simulasi menunjukkan bahwa dengan menggunakan SVC (-4Mvar), profil tegangan telah ditingkatkan. Diamati bahwa profil tegangan bus GI Alas 20 kV ditemukan 0,81 p.u tanpa SVC dan dengan SVC meningkat menjadi 0,98 p.u. Margin kestabilan tegangan juga telah ditingkatkan, didapatkan Bus GI Alas tanpa SVC stabil dipembebanan 7,22 MW dan dengan SVC stabil dipembebanan 17,83 MW sebelum terjadi Undervoltage.

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Alzate Gomez, Alfonso James, Andrea Bedoya Londoño, and Jesser James Marulanda Durango. "Aplicación del control inteligente en oscilaciones usando FACTS (STATCOM y SVC)." Tecnura 21, no. 53 (July 1, 2017): 47–60. http://dx.doi.org/10.14483/22487638.11553.

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Contexto: Reducir las oscilaciones de un sistema eléctrico de potencia es necesario para mantener la estabilidad del mismo. En este trabajo se presenta una metodología para la sintonización de un controlador de oscilaciones de tipo difuso, un compensador de Volts Ampere Reactive, (VAR, por sus siglas en inglés), uno estático (Static Var Compensator, SVC, por sus siglas en inglés), y un compensador estático síncrono (Static Synchronous Compensator, STATCOM, por sus siglas en inglés), por métodos inteligentes.Método: Consiste en sintonizar un controlador de tipo difuso para amortiguar las oscilaciones de un sistema eléctrico de potencia por medio de un STATCOM o un SVC, a través de diferentes técnicas de optimización tales como: algoritmos genéticos (GA, Genetic Algorithm), optimización por enjambre de partículas (PSO, Particle Swarm Optimization) y algoritmo de optimización caótica (COA, Chaotic Optimization Algorithm).Resultados: A través de simulación se obtienen las oscilaciones en el voltaje y la velocidad de un sistema compuesto por una máquina sincróna conectada a un barraje infinito (SMIB, Single Machine Infinite Bus) antes y después de conectar un SVC y un STATCOM, ambos instalados independientemente y en diferentes condiciones de operación. Los resultados muestran las ventajas de utilizar métodos de ajuste para el controlador difuso comparados con el ajuste a ensayo y error.Conclusión: A partir de los resultados obtenidos, se comprueba la efectividad del controlador difuso utilizado en el control de oscilaciones con dispositivos Flexible AC Transmissions Systems (FACTS, por sus siglas en inglés) tanto en el SVC como en el STATCOM.

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Mohd Ali, N. Z., I. Musirin, and H. Mohamad. "Clonal evolutionary particle swarm optimization for congestion management and compensation scheme in power system." Indonesian Journal of Electrical Engineering and Computer Science 16, no. 2 (November 1, 2019): 591. http://dx.doi.org/10.11591/ijeecs.v16.i2.pp591-598.

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This paper presents computational intelligence-based technique for congestion management and compensation scheme in power systems. Firstly, a new model termed as Integrated Multilayer Artificial Neural Networks (IMLANNs) is developed to predict congested line and voltage stability index separately. Consequently, a new optimization technique termed as Clonal Evolutionary Particle Swarm Optimization (CEPSO) was developed. CEPSO is initially used to optimize the location and sizing of FACTS devices for compensation scheme. In this study, Static VAR Compensator (SVC) and Thyristor Control Static Compensator (TCSC) are the two chosen Flexible AC Transmission System (FACTS) devices used in this compensation scheme. Comparative studies have been conducted between the proposed CEPSO and traditional Particle Swarm Optimization (PSO). Results obtained by the developed IMLANNs demonstrated high accuracy with respect to the targeted output. Consequently, the proposed CEPSO implemented for single objective in single unit of SVC and TCSC has resulted superior results as compared to the traditional PSO in terms of achieving loss reduction and voltage profile improvement.

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Tran, Thin Goat, Xiao Ming Zha, and Le Ngoc Giang. "Performance Comparison between STATCOM and SVC to Enhance Power System Stability." Applied Mechanics and Materials 446-447 (November 2013): 759–63. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.759.

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This paper will discuss and demonstrate how FACTS controllers shunt Static Synchronous Compensator (STATCOM) and Static VAR Compensator (SVC) have successfully been applied to power system for effective regulating system voltage. One of the major reasons for installing a STATCOM or SVC is to improve dynamic voltage control and thus increase system load ability. In this paper a STATCOM and SVC are used to regulate voltage in a power system. When system voltage is low they generate reactive power (capacitive). When system voltage is high they absorb reactive power (inductive). In this paper comparison is also performed between SVC and STATCOM under fault condition and it is show that STATCOM have the ability to provide more capacitive power during a fault over SVC. All the simulations for the above work have been carried out using MATLAB/SIMULINK environment.

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Sun, Xiao Bo, and Da Wei Meng. "A Calculation Method of Reactive Compensation Susceptances Based on Balance Principle." Applied Mechanics and Materials 347-350 (August 2013): 1501–5. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.1501.

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Static var Compensator (SVC) can suppress the voltage fluctuation, flicker and rapidly compensate the reactive power and the quality of electric power can be improved. In this paper, a new calculation method of reactive susceptances based on balance principle was proposed, which only uses the fundamental positive reactive and negative active & reactive components, and was analyzed and verified by simulation and dynamic test. The results of simulation and experiment show that the method can achieve the dynamic compensation of reactive power of the unbalanced load, and it is accurate, rapid and efficient.

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Maridueña, Víctor Manuel, Edwin Arnaldo Castro, and Nelson Layedra. "Analysis of the Response of a Static Reactive Power Compensator to Instability and Failure in Electrical grids." Journal of Physics: Conference Series 2065, no. 1 (November 1, 2021): 012023. http://dx.doi.org/10.1088/1742-6596/2065/1/012023.

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Abstract The reliability of electrical power systems has led to the implementation of new equipment with reliable technology to solve transient failures, in recent decades flexible AC transmission systems (FACTS) have been implemented in power grids, resulting in high levels of stability and control. One of the elements used is static VAR compensators (SVC), however there is very little information about the dynamic response of the device to network instability and electrical failures, for which Simulink analyses the response of the SVC. The device consists of a 47.1 MVar reactive power compensator and a 97.6 MVar inductive reactivator compensator, implemented in a three-phase 500 kV system. The results indicate the effectiveness of response against network instability while maintaining the stable voltage of the network, but against electrical failures the type and time of failure must be considered. In the case of phase-phase faults, the response of the SVC is limited with drops of 0.52 pu.

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G, Ramya, Vinil M, Ajay Daniel J, and Moovendan M. "Energy Improvement in Distribution Network Using Sliding Mode Controller Based SVC System." ECS Transactions 107, no. 1 (April 24, 2022): 5155–63. http://dx.doi.org/10.1149/10701.5155ecst.

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Static Var Compensator is a shunt type reactive power compensation device used to enhance the energy in the distribution system. This paper presents the power quality improvement using SVC in 14 bus system using Proposed Resonance and Sliding Mode (SM) Controller to improve the power quality. Minimized power losses and improved power transfer capacity to stabilize the weak system are the main functions of the SVC system. The instantaneous response of SVC is the main important advantage in comparison with mechanically switched compensation devices. SVC is installed at the point of common coupling to improve the reactive power. The performance of the multibus system is analyzed in terms of real power, reactive power, and RMS voltage of the system, and is simulated using MATLAB Simulink.

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Liu, Jin, and Ze Yu Zhong. "Research of SVC Control System Based on Real-Time Operation System for Wind Farm." Advanced Materials Research 516-517 (May 2012): 1921–25. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1921.

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Wind power generation was developed rapidly in China. And many wind farms are configured Dynamic Static Var Compensators (SVCs) as reactive power compensator, which can meet the dynamic demands of the reactive power compensation for the wind farm. The paper put forward a coordination control strategy of reactive power for wind farm based on embedded real-time operation system in DSP, and by using LabVIEW to realize PC management and network communication management, and provides the research foundation for coordination and the optimal control of reactive power in large wind farm.

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Jumaat, Siti Amely, and Ismail Musirin. "Comparison of SVC and TCSC Installation in Transmission Line with Loss Minimization and Cost of Installation via Particle Swarm Optimization." Applied Mechanics and Materials 785 (August 2015): 495–99. http://dx.doi.org/10.4028/www.scientific.net/amm.785.495.

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The paper presents a comparison of performance Static Var Compensator (SVC) and Thyristor Controlled Series Compensator (TCSC) with objective function to minimize the transmission loss, improve the voltage and monitoring the cost of installation. Simulation performed on standard IEEE 30-Bus RTS and indicated that EPSO a feasible to achieve the objective function.

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Guo, Guo Liang, Bao Zhu Liu, Bin Zheng Dong, and Yun Xiao Bai. "SVC Subsection Control Strategy Considering Voltage Stability of Dynamic Load." Advanced Materials Research 614-615 (December 2012): 1038–42. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.1038.

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A kind of Static Var Compensator(SVC) subsection control strategy for transient process of dynamic load is presented in this paper. The strategy can determine SVC's action according to the condition of system and load so as to output different compensation capacity in different stage to make dynamic load stable and make sure the voltage is qualified; SVC will be shut when it's noneffective in this strategy so that other regulate way can be used timely. The validity and accuracy of the strategy is verified in tow-bus equivalent system.

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Zhao, Yong Bin, Jun Yang, Qiu Ye Sun, and Xu Huang. "Improvement of Transient Voltage Stability of the Wind Farm Using SVC." Advanced Materials Research 608-609 (December 2012): 653–57. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.653.

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Static var compensator (SVC) is used to improve transient voltage stability of the asynchronous wind farm. The issue of voltage stability and transient stability of wind power system are also addressed. A novel control strategy of SVC is proposed instead of the types of traditional feedforward and uniline feedback to control SVC. The proposed method makes control performance better and the compensation efficiency higher. At the same time, balanced compensation strategy of orientation vector conversion is applied instead of traditional model of steady-state phasor to calculate the compensation electrical susceptance. Using this method can overcome the shortcoming of dynamic characteristics and adaptability. At last, the simulation results indicate this control strategy could improve the stability of wind farm effectively and quickly.

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Suzuki, Kenichi, Masashi Yajima, Mikiya Nohara, Shigeta Ueda, Hiroyasu Satou, and Yoshio Eguchi. "Control Method for 50MVA Self-Commutated Static Var Compensator." IEEJ Transactions on Power and Energy 117, no. 7 (1997): 953–59. http://dx.doi.org/10.1541/ieejpes1990.117.7_953.

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Ćalasan, Martin, Tatjana Konjić, Katarina Kecojević, and Lazar Nikitović. "Optimal Allocation of Static Var Compensators in Electric Power Systems." Energies 13, no. 12 (June 21, 2020): 3219. http://dx.doi.org/10.3390/en13123219.

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In the current age, power systems contain many modern elements, one example being Flexible AC Transmission System (FACTS) devices, which play an important role in enhancing the static and dynamic performance of the systems. However, due to the high costs of FACTS devices, the location, type, and value of the reactive power of these devices must be optimized to maximize their resulting benefits. In this paper, the problem of optimal power flow for the minimization of power losses is considered for a power system with or without a FACTS controller, such as a Static Var Compensator (SVC) device The impact of location and SVC reactive power values on power system losses are considered in power systems with and without the presence of wind power. Furthermore, constant and variable load are considered. The mentioned investigation is realized on both IEEE 9 and IEEE 30 test bus systems. Optimal SVC allocation are performed in program GAMS using CONOPT solver. For constant load data, the obtained results of an optimal SVC allocation and the minimal value of power losses are compared with known solutions from the literature. It is shown that the CONOPT solver is useful for finding the optimal location of SVC devices in a power system with or without the presence of wind energy. The comparison of results obtained using CONOPT solver and four metaheuristic method for minimization of power system losses are also investigated and presented.

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Dong, Jun, Yan Jun Pang, Da Lin Zhang, Zheng Zhi Yu, Qing Hao Wang, Chang Bo Zhang, and Jing Liu. "The High-Voltage Reactive Power Compensation Device Applications and Innovations." Applied Mechanics and Materials 494-495 (February 2014): 1787–90. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.1787.

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This article briefly describes the modern power system of high-voltage reactive power compensation device development status, discusses the high voltage reactive power compensation device applications, with the traditional high-voltage reactive power compensation device matching, demonstration of a new generation SVC (Static Var Compensator) and SVG (STATCOM) advantages and application results. This paper focuses on the innovative technology in the new generation of high-voltage reactive power compensation device in the application, while a new generation of high voltage discussed reactive power compensation device application prospects.

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Buraimoh, Elutunji, Funso Kehinde Ariyo, Micheal Omoigui, and Innocent Ewaen Davidson. "Investigation of Combined SVC and TCSC versus IPFC in Enhancing Power System Static Security." International Journal of Engineering Research in Africa 40 (December 2018): 119–35. http://dx.doi.org/10.4028/www.scientific.net/jera.40.119.

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Electrical power systems are often required to operate at full loading capacity due to ever increasing demand and transmission line contingencies with limited grid expansion. This results in line overload and operating near system limit, thereby threatening system security. Utilization of existing system can be achieved using Flexible Alternating Current Transmission System (FACTS) devices without violating system limits. This research investigation involves static security assessment of a modelled IEEE 30-bus test system in MATLAB/SIMULINK/PSAT environment. The security status with the incorporation of combined Static Var Compensator (SVC), Thyristor Controlled Series Compensator (TCSC) and Interline Power Flow Controller (IPFC) were determined. Prior to this, Contingency Severity Index (CSI) based on Performance Index (PI) of Voltage and Active Power was employed to determine the optimal location of the FACTS devices. Sequential Quadratic Programming (SQP) was applied to determine the optimal sizing/percentage compensation of FACTS. Subsequently, power system with and without the incorporation of FACTS devices were modelled. The ability of the compensated system to withstand credible transmission line contingencies without violating the normal operating limits (bus voltage and line thermal) was examined and presented. The paper presents how combined SVC/TCSC and an IPFC aided the power system to boost its steady state security in the face of possible line contingencies.

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Adware, Ramchandra, and Vinod Chandrakar. "A Hybrid STATCOM Approach to Enhance the Grid Power Quality associated with a Wind Farm." Engineering, Technology & Applied Science Research 13, no. 4 (August 9, 2023): 11426–31. http://dx.doi.org/10.48084/etasr.6125.

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The growing use of renewable energy sources in the production of electric power has certain adverse effects on power quality. A compensation system includes some additional devices, such as capacitors, compensators, or reactive power injection devices. FACTS devices, such as the Static Var Compensator (SVC), Dynamic Voltage Restorer (DVR), and Unified Power Quality Conditioner (UPQC), have become popular as power electronics become more sophisticated. This study investigated the properties of three significant compensating devices: SVC, STATCOM with PI controller, and hybrid STATCOM with a harmonic filter. Common power quality concerns, such as voltage sags and swells and the percentage of Total Harmonic Distortion (TDH), were taken into account during the initial modeling and performance analysis of the proposed system. The overall results showed that the proposed hybrid STATCOM system enhanced the power quality in wind energy systems more than the other two systems.

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Rajesh, T., and S. Rajeswari. "Power quality improvement and reactive power compensationusing enhancedsliding mode controllerbased shunt active power filter and static VAR compensator." International Journal of Engineering & Technology 7, no. 2.8 (March 19, 2018): 543. http://dx.doi.org/10.14419/ijet.v7i2.8.10518.

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The power quality is the challenging criteria in all equipment’s at all levels comprise industrial sectors and consumer places. Some parameters are very sensitive which may affect and disturb the power quality. These parameters are harmonic current, power compensation and voltage sag. Providing the source without these parameters with efficient power quality is essential. Hence by selecting proper device the power output may reach without any interruption along with linear, non-linear and unbalanced loads. This paper introduces a Sliding Mode Controller (SMC), a very effective controller implemented with Shunt active filter and Static VAR Compensator (SVC) FACTS device which increases the reactive power compensation and suppresses the harmonic to enhance the system performance with high reliability.

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Shrivastava, Manish, Vinay Prakash, Vishal Kaushik, and Vivek Kumar Upadhyay. "Transient Stability Improvement of IEEE 9-Bus System Using Static Var Compensator." International Journal of Research in Engineering, Science and Management 4, no. 4 (April 26, 2021): 98–102. http://dx.doi.org/10.47607/ijresm.2021.663.

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With increase in power demand over the last few decades, there has been a great expansion in power generation & transmission. But due to various disturbances, improper loading and environmental conditions the power systems are working near their stability limits which have become a power-transfer limiting factor. This in turn poses a threat to the stability of the system. Transient stability has been considered as one of the most important stability for a power system. In this paper Static VAR Compensator (SVC) has been discussed for reactive power control and hence improvement of transient stability and voltage profile. This paper incorporates IEEE-9 BUS test system with SVC controller using MATLAB Simulation.

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Jahi, Amir, and S. S. Tezcan. "Reducing Voltage Fluctuations in Wind Turbines by SVC Method." Applied Mechanics and Materials 850 (August 2016): 166–71. http://dx.doi.org/10.4028/www.scientific.net/amm.850.166.

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Today because of increasing wind generation in the power systems, voltage variations are critical in power quality of grid combination of wind energy. This paper presents a Static Var Compensator (SVC) as an efficient choice for the reactive power regulation of wind turbines to decrease voltage fluctuations, and the proposed modulation is performed for the cases with and without SVC. The simulation showed the effective influences of the SVC on the voltage characteristic with the unexpected changes in the voltage magnitude.

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Sahoo, Ashwin Kumar, Sarat Kumar Sahoo, and Nalinikanta Mohanty. "Modeling and Simulation of Three Phase D-SVC for Load Compensation." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 1 (March 1, 2017): 262. http://dx.doi.org/10.11591/ijpeds.v8.i1.pp262-271.

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The transmission of electric power has to take place in the most efficient way in addition to providing flexibility in the process. Flexible A.C. Transmission System (FACTS) promotes the use of static controllers to enhance the controllability and increase the power transfer capability. Providing reactive shunt compensation with shunt-connected capacitors and reactors is a well-established technique to get a better voltage profile in a power system. Shunt Capacitors are inexpensive but lack dynamic capabilities, thus some form of dynamically controlled reactive power compensation becomes essential. In this paper, three phase Distribution Static Var Compensator (D-SVC) has been developed and studied under different conditions. Open loop mode and closed loop mode of operation of D-SVC is simulated and studied. The work presented here is very much useful for distribution system, for effective reactive power management and better Voltage control.

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Pană, Adrian, Alexandru Băloi, and Florin Molnar-Matei. "Iterative Method for Determining the Values of the Susceptances of a Balancing Capacitive Compensator." Energies 11, no. 10 (October 12, 2018): 2742. http://dx.doi.org/10.3390/en11102742.

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To increase the electrical power quality, in the last decades, an intense development in the last decades of high-performance equipment built as advanced power electronics applications, such as the compensators from Switching Power Converter category, has taken place. For all that, Reactive Power Compensators (RPC) based on passive circuit elements, such as Static var Compensators (SVCs), still occupy a wide range of applications in customer and installations of the distribution system installations. The functions of power factor (PF) improvement and load balancing in a three-phase distribution network can be achieved with an unbalanced SVC, known as the Adaptive Balancing Reactive Compensator (ABRC). Presenting first the mathematical model of the initial sizing and the working mechanism of a Balancing Reactive Compensator (BRC) for a three-phase four-wire network, this article develops a compensator resizing algorithm through an iterative change of the initial sizing to transform the compensator into a Balancing Capacitive Compensator (BCC), which keeps the same functions. By using two computational and modeling software tools, a case study on the application of the method was carried out, demonstrating the availability of the sizing problem solution and validating the unbalanced capacitive compensation as an efficient way to PF improving and load balancing in a PCC (Point of Common Coupling).

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Saleh, Ba-swaimi, Lee Jun Yin, and Renuga Verayiah. "Voltage regulation and power loss reduction by integration of SVC in distribution networks via PSSE." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (September 1, 2020): 1579. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1579-1587.

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Voltage stability is necessary in order to maintain the health of the grid system. In recent years, the load demand is increasing from time-to-time which compromised the stability of the system. On that purpose, several methods on enhancing the voltage stability of the system was introduced such as the transformer tap and FACTS devices. In a general overview, this study is to propose a several power compensation techniques on the base case of an IEEE-33 bus whereby power flow analysis using Netwon- Raphson in PSS/E software is performed. Afterwards, distributed generation (DG) and Static VAR Compensator (SVC) will be implemented within the distribution network to compensate the voltage instability losses based on the weakest index from the bus system. From both the cases which is proposed earlier, a comparison study is conducted on the performance on both DG and SVC within the proposed network.

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Nabhar, Khalid A., and Basim T. Kadhem. "DAMPING SUB SYNCHRONOUS RESONANCE IN POWER SYSTEM USING TCSC & SVC." Al-Qadisiyah Journal for Engineering Sciences 11, no. 2 (January 29, 2019): 203–16. http://dx.doi.org/10.30772/qjes.v11i2.553.

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when the steam turbine-generator is connected with series of compensation along the transmission line, the sub synchronous resonance may happen. The Flexible Ac Transmission System (FACTS) controller of the devices wide use which has been used to reduce and suppress the phenomenon of sub-synchronous resonance the Thyristor Control Series Compensation (TCSC) and Static VAR Compensation (SVC) are the types of FACTS controller that has been used to put down the SSR and also for the purpose of provide a better and efficient solution to improve the transferred capacity system to connect the series compensation along the transmission line. Series capacitor work to increase the chance of creating sub synchronous resonance. Series capacitors also have an inclination to amplify the shaft stress during considerable network transien toccurrence, SSR phenomena happen which can cause damage of the shaft generator turbine. The first standard model of IEEE was adopted to study this phenomenon. This research deals the PID control of SVC( Static VAR Compensation) and TCSC (Thyristor Controlled Series Compensator) and excitation system controller for reducing SSR in power system. In this research, the method of Eigenvalue was used to analysis the sub-synchronous resonance phenomenon and the result was verified using DYMOLA simulation

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Suyono, Hadi, Rini Nur Hasanah, and Paramita Dwi Putri Pranyata. "Optimization of the Thyristor Controlled Phase Shifting Transformer using PSO Algorithm." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 6 (December 1, 2018): 5472. http://dx.doi.org/10.11591/ijece.v8i6.pp5472-5483.

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The increase of power system demand leads to the change in voltage profile, reliability requirement and system robustness against disturbance. The voltage profile can be improved by providing a source of reactive power through the addition of new power plants, capacitor banks, or implementation of Flexible AC Transmission System (FACTS) devices such as Static VAR Compensator (SVC), Unified Power Flow Control (UPFC), Thyristor Controlled Series Capacitor (TCSC), Thyristor Controlled Phase Shifting Transformer (TCPST), and many others. Determination of optimal location and sizing of device injection is paramount to produce the best improvement of voltage profile and power losses reduction. In this paper, optimization of the combined advantages of TCPST and TCSC has been investigated using Particle Swarm Optimization (PSO) algorithm, being applied to the 30-bus system IEEE standard. The effectiveness of the placement and sizing of TCPST-TCSC combination has been compared to the implementation of capacitor banks. The result showed that the combination of TCPST-TCSC resulted in more effective improvement of system power losses condition than the implementation of capacitor banks. The power losses reduction of 46.47% and 42.03% have been obtained using of TCPST-TCSC combination and capacitor banks respectively. The TCPST-TCSC and Capacitor Bank implementations by using PSO algorithm have also been compared with the implementation of Static VAR Compensator (SVC) using Artificial Bee Colony (ABC) Algorithm. The implementation of the TCSC-TCPST compensation with PSO algorithm have gave a better result than using the capacitor bank with PSO algorithm and SVC with the ABC algorithm.

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Dazahra, M. N., F. Elmariami, A. Belfqih, and J. Boukherouaa. "Optimal Location of SVC using Particle Swarm Optimization and Voltage Stability Indexes." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 6 (December 1, 2016): 2581. http://dx.doi.org/10.11591/ijece.v6i6.11921.

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Flexible AC transmission system are widley used in power sytems to ensure voltage stability, in virtue of their high cost the choise of the best location in electrical network is essential. The porpose of this paper is to present a new method for finding the optimal location, size and number of Static Var Compensator in order to enhace the voltage stability of electrical network. The optimal solution has been found by using the evolutionary programming algorithm, particle swarm optimization, combined with voltage stability indexes used for the estimation of the voltage collapse in power systems.The proposed algorithm has been validated by application on both simulation network model IEEE 30-Buses under different load cases and the electric network model of Casablanca region in Morocco.The results of the application have been analysed and compared in each case in order to get the optimal number of Static Var Compensator to be used.

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Dazahra, M. N., F. Elmariami, A. Belfqih, and J. Boukherouaa. "Optimal Location of SVC using Particle Swarm Optimization and Voltage Stability Indexes." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 6 (December 1, 2016): 2581. http://dx.doi.org/10.11591/ijece.v6i6.pp2581-2588.

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Flexible AC transmission system are widley used in power sytems to ensure voltage stability, in virtue of their high cost the choise of the best location in electrical network is essential. The porpose of this paper is to present a new method for finding the optimal location, size and number of Static Var Compensator in order to enhace the voltage stability of electrical network. The optimal solution has been found by using the evolutionary programming algorithm, particle swarm optimization, combined with voltage stability indexes used for the estimation of the voltage collapse in power systems.The proposed algorithm has been validated by application on both simulation network model IEEE 30-Buses under different load cases and the electric network model of Casablanca region in Morocco.The results of the application have been analysed and compared in each case in order to get the optimal number of Static Var Compensator to be used.

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Fayaz, Farhana, and Gobind Lal Pahuja. "ANN-Based Relaying Algorithm for Protection of SVC- Compensated AC Transmission Line and Criticality Analysis of a Digital Relay." Recent Advances in Computer Science and Communications 13, no. 3 (August 12, 2020): 381–93. http://dx.doi.org/10.2174/2213275912666190307163818.

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Background:The Static VAR Compensator (SVC) has the capability of improving reliability, operation and control of the transmission system thereby improving the dynamic performance of power system. SVC is a widely used shunt FACTS device, which is an important tool for the reactive power compensation in high voltage AC transmission systems. The transmission lines compensated with the SVC may experience faults and hence need a protection system against the damage caused by these faults as well as provide the uninterrupted supply of power.Methods:The research work reported in the paper is a successful attempt to reduce the time to detect faults on a SVC-compensated transmission line to less than quarter of a cycle. The relay algorithm involves two ANNs, one for detection and the other for classification of faults, including the identification of the faulted phase/phases. RMS (Root Mean Square) values of line voltages and ratios of sequence components of line currents are used as inputs to the ANNs. Extensive training and testing of the two ANNs have been carried out using the data generated by simulating an SVC-compensated transmission line in PSCAD at a signal sampling frequency of 1 kHz. Back-propagation method has been used for the training and testing. Also the criticality analysis of the existing relay and the modified relay has been done using three fault tree importance measures i.e., Fussell-Vesely (FV) Importance, Risk Achievement Worth (RAW) and Risk Reduction Worth (RRW).Results:It is found that the relay detects any type of fault occurring anywhere on the line with 100% accuracy within a short time of 4 ms. It also classifies the type of the fault and indicates the faulted phase or phases, as the case may be, with 100% accuracy within 15 ms, that is well before a circuit breaker can clear the fault. As demonstrated, fault detection and classification by the use of ANNs is reliable and accurate when a large data set is available for training. The results from the criticality analysis show that the criticality ranking varies in both the designs (existing relay and the existing modified relay) and the ranking of the improved measurement system in the modified relay changes from 2 to 4.Conclusion:A relaying algorithm is proposed for the protection of transmission line compensated with Static Var Compensator (SVC) and criticality ranking of different failure modes of a digital relay is carried out. The proposed scheme has significant advantages over more traditional relaying algorithms. It is suitable for high resistance faults and is not affected by the inception angle nor by the location of fault.

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Journal articles on the topic 'Static Var Compensator (SVC)'

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