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Journal articles on the topic 'Synchronous reference frame theory'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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Subash Kumar, C. S., and V. Gopalakrishnan. "Modified Synchronous Reference Frame Based Harmonic Extraction for Shunt Active Filter." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 4 (2015): 897. http://dx.doi.org/10.11591/ijpeds.v6.i4.pp897-905.

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This paper presents the modified synchronous reference frame based Shunt Active Filter (SAF) for the instantaneous compensation of harmonic current present at the Point of Common Coupling. The harmonics generated by the non linear load are extracted using the positive frame and negative frame of the input signal using the modified synchronous reference frame theory with extended Multiple Reference Frame based PLL (EMRFPLL). Based on the harmonics extracted, pulse width modulation signals are generated using Artificial Neural Network based Space Vector Pulse width Modulation technique (ANNSVPWM). Using this switching technique the losses can be reduced and compensation can be done more accurately The concept was verified using MATLAB / Simulink Simulation and the results confirm the THD at point of common coupling is below the required standards.

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Bangarraju, J., V. Rajagopal, and A. Jayalaxmi. "Unit Template Synchronous Reference Frame Theory Based Control Algorithm for DSTATCOM." Journal of The Institution of Engineers (India): Series B 95, no. 2 (2014): 135–41. http://dx.doi.org/10.1007/s40031-014-0087-y.

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Osetrin, Konstantin, Evgeny Osetrin, and Elena Osetrina. "Deviation of Geodesics, Particle Trajectories and the Propagation of Radiation in Gravitational Waves in Shapovalov Type III Wave Spacetimes." Symmetry 15, no. 7 (2023): 1455. http://dx.doi.org/10.3390/sym15071455.

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A class of exact (non-perturbative) models of strong gravitational waves based on Shapovalov type III spacetimes and Einstein’s vacuum equations is obtained. Exact solutions are found for the trajectories of particles and radiation in a gravitational wave in privileged coordinate systems. Exact solutions are obtained for the equations of geodesic deviation and tidal acceleration of particles in a gravitational wave in privileged coordinate systems. An explicit analytical law of transition from a privileged coordinate system to a synchronous reference system associated with a freely falling observer with an explicit selection of time and spatial coordinates is obtained. An explicit form of the metric of a gravitational wave in a synchronous frame of reference is obtained. For a synchronous frame of reference, the trajectories of particles and radiation, the deviation of geodesics, and tidal accelerations in a gravitational wave are obtained. The presented methods and approaches are applicable both to Einstein’s general theory of relativity and to modified theories of gravity.

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Sathiyanarayanan, T., and S. Mishra. "Synchronous Reference Frame Theory based Model Predictive Control for Grid Connected Photovoltaic Systems." IFAC-PapersOnLine 49, no. 1 (2016): 766–71. http://dx.doi.org/10.1016/j.ifacol.2016.03.149.

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D., Uma, and Vijayarekha K. "Modeling and Simulation of VSI Fed Induction Motor Drive in Matlab/Simulink." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 2 (2017): 584–95. https://doi.org/10.11591/ijece.v7i2.pp584-595.

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The theory of reference frames and switching functions are effective in analyzing the performance of the induction motor fed from VSI (Voltage Source Inverter). In this work, mathematical model of Adjustable Speed Drive (ASD) is developed by taking synchronous reference frame equations for induction motor, switching function concept for VSI and non-switching concept for diode bridge rectifier. Simulation model of induction machine is implemented using dq0 axis transformations of the stator and rotor variables in the arbitrary reference frame. The corresponding equations are given in the beginning and then the developed model is implemented using MATLAB/Simulink. In this work, the proposed model is implemented using basic function blocks. The performance of induction motor is analysed for different frequencies. The developed model is tested for the steady state behavior of machine drive. The proposed mathematical model is validated by the simulation results.

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Jeong, Horyeong, Jong Hyuk Choi, and Jae Suk Lee. "A Current Control Algorithm to Improve Command Tracking Performance and Resilience of a Grid-Connected Inverter." Applied Sciences 10, no. 23 (2020): 8642. http://dx.doi.org/10.3390/app10238642.

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This paper presents a stationary reference frame grid current control algorithm for a grid-connected inverter (GCI) to improve command tracking performance and resilience in response to disturbances, i.e., a grid voltage incident in a GCI current control system. In the proposed algorithm, disturbance rejection is applied to reduce the overcurrent at the GCI in response to a grid fault. Disturbances to the GCI current control system are estimated using a grid current observer, and the estimate applied to the grid current controller to activate the disturbance rejection. The stationary reference frame current of a GCI system is also controlled to avoid cross-coupling issues at a synchronous reference frame model, reference transformation and dependency to phase locked loop (PLL) performance. However, the phase lead or lag and steady-state response error, which are drawbacks of AC signal control based on stationary reference frame proportional-integral (PI) controller, must be eliminated in order to secure competition with the synchronous reference PI (SRFPI) controller that was mainly used in the GCI system. Hence, to compensate for command tracking the AC current, such as steady-state response error and phase lead or lag, command feedforward control is applied in the proposed control system. The theory behind the proposed GCI current control algorithm is analyzed, and the proposed algorithm is tested via simulation and experimentation.

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Karthikrjan, Senthilnathan, Annapoorani Iyswarya, and Ravi S. "Simulation and Hardware Implementation of Shunt Active Power Filter Based on Synchronous Reference Frame Theory." TELKOMNIKA Telecommunication, Computing, Electronics and Control 16, no. 1 (2018): 1–9. https://doi.org/10.12928/TELKOMNIKA.v16i1.6524.

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This paper describes about the Shunt Active Power Filter (SAPF) for the elimination of the current harmonics in the line side. The Active Power Filter is based on the Voltage Source Inverter (VSI) topology. The Synchronous Reference Frame (SRF) theory based control strategy is utilized for SAPF. The SAPF has the better performance for compensation of harmonics. The simulation of shunt active power filter is performed in MATLAB/Simulink. The SAPF is implemented in hardware protptype with ATMEGA 8 Microcontroller. The Simulation and Hardware result shows that the current harmonics are eliminated in the system.

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Uma, D., and K. Vijayarekha. "Modeling and Simulation of VSI Fed Induction Motor Drive in Matlab/Simulink." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 2 (2017): 584. http://dx.doi.org/10.11591/ijece.v7i2.pp584-595.

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The theory of reference frames and switching functions are effective in analyzing the performance of the induction motor fed from VSI (Voltage Source Inverter). In this work, mathematical model of Adjustable Speed Drive (ASD) is developed by taking synchronous reference frame equations for induction motor, switching function concept for VSI and non-switching concept for diode bridge rectifier. The developed model is implemented using MATLAB/Simulink as it is an important tool for the validation of the proposed model. The performance of induction motor is analysed for different frequencies. The developed model is tested for the steady state behavior of machine drive. The proposed mathematical model is validated by the simulation results.

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Senthilnathan, Karthikrjan, Iyswarya Annapoorani, and S. Ravi. "Simulation and Hardware Implementation of Shunt Active Power Filter Based on Synchronous Reference Frame Theory." TELKOMNIKA (Telecommunication Computing Electronics and Control) 16, no. 1 (2018): 1. http://dx.doi.org/10.12928/telkomnika.v16i1.6524.

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Song, Qing Shuo. "Control for 3-Phase 4-Wire Active Power Filter Based on Synchronous Reference Frame." Advanced Materials Research 460 (February 2012): 304–7. http://dx.doi.org/10.4028/www.scientific.net/amr.460.304.

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This paper presents a new control approach based on synchronous reference frame for an active power filter (APF) to compensate harmonic and the reactive power of a 3-phase thyristor bridge rectifier under the different loads. Matlab/simulink power system toolbox is used to simulate the proposed system. The proposed method performance is compared with conventional instantaneous power (p–q) theory. The simulation results are presented and discussed showing the effectiveness of the control algorithm. The increased performance of the active power filter and dynamic load conditions are extensively demonstrated.

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Constantinescu, Mihăiţă Daniel, Mihaela Popescu, and Constantin Vlad Suru. "Comparative Analysis of Two Methods of Calculating the Prescribed Current in a Shunt Active Filtering System." Annals of the University of Craiova, Electrical Engineering Series 45, no. 1 (2021): 46–51. http://dx.doi.org/10.52846/aucee.2021.1.07.

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- In this paper, the performance of a three-phase shunt active power filter (APF) using the instantaneous power theory (p-q theory) has been compared with that corresponding to the use of the synchronous reference frame (SRF) based method. It is clear that, under balanced and sinusoidal voltage conditions, these two methods gives similar results. The entire system has been modeled using MATLAB-SIMULINK software. The simulation results demonstrate the applicability of both methods for the APF control.

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Mörée, Gustav, and Mats Leijon. "Simplified Current-Equivalent Circuit Models of Synchronous Reluctance Machines and Salient Pole Synchronous Machines Considering the Reluctance Torque." Energies 17, no. 5 (2024): 1015. http://dx.doi.org/10.3390/en17051015.

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This paper describes a simplified one-phase equivalent circuit model of three-phase salient pole synchronous machines and synchronous reluctance machines. The model represents the pole saliency as a susceptance, with a magnitude based on the pole saliency and a phase angle based on twice the load angle. The reluctance torque itself is then modeled equivalent to a conductance. The model is made as an extension to Norton equivalents, where the internal inductance is connected as a shunt. This approach shares similarities to the magnetization shunt branch in circuit models of transformers and induction motors. The model is derived using the rotating dq-frame, using Park transform and two-reaction theory. The model is then rewritten to better fit one-phase equivalent circuit models, with the terminal voltage as the angular reference. The resulting two-pole model can then more easily be combined with basic circuit theory, thereby synthesizing dq-theory and phasor circuit models.

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Putra, Reynaldo Rizkika, Paulus Setiawan, and Bambang Sudibya. "Analisis Pemodelan Dinamik Motor Sinkron Tiga Fasa Pada Percobaan Tegangan Tidak Seimbang." AVITEC 4, no. 1 (2022): 43. http://dx.doi.org/10.28989/avitec.v4i1.1163.

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The problem that often arises lately in electrical motors is the occurrence of voltage imbalances. Unbalanced voltage is an unequal voltage value in a three-phase voltage system contained in an electric power system. On the basis of these problems, it is necessary to conduct research that can analyze the dynamics of the performance of synchronous motors. The frame of reference theory is used to analyze the performance of both synchronous and induction motors. This study implements the modeling of the transformation on the natural axis abc and the transformation on the dq0 axis of the stator and rotor variables in the coordinates of the reference frame. The results of this study indicate that the voltage imbalance from 1% to 5% at the electromagnetic torque has decreased from 8.5 Nm to 6 Nm, the stator current in one phase has increased from 44.2 amperes to 45.2 amperes, the motor rotation speed has decreased from 1820 rpm to 1570 rpm, motor output power decreased from 25550.05 watts to 18968.45 watts, and power efficiency decreased from 98.24% to 82.43%.

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Prasad, Miska, and Ashok Kumar Akella. "Comparison of DSTATCOM Performance for Voltage Sag Alleviation." Indonesian Journal of Electrical Engineering and Computer Science 4, no. 2 (2016): 305. http://dx.doi.org/10.11591/ijeecs.v4.i2.pp305-316.

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This paper describes the comparative analysis of three different control techniques of distributed flexible AC transmission system (DFACTS) controller called as distributed static synchronous compensator (DSTATCOM), aimed at power quality (PQ) enhancement in terms of voltage sag mitigation in a three-phase four-wire (3p4w) distribution system. A DSTATCOM is one of the major power quality improvement devices which consist of a DC energy source, a voltage source inverter (VSI), a filter, a coupling transformer and the control system. The control strategy based on synchronous reference frame (SRF) theory, instantaneous active and reactive current (IARC) theory and propositional-integral (PI) controller has been used for reference current generation of voltage source inverter (VSI) based DSTATCOM. The SRF, IARC and PI control based DSTATCOM is validated through dynamic simulation in a MATLAB\SIMULINK environment under linear as well as nonlinear loads.

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Teja, A. Naveen. "Compensation of Voltage Dip and Voltage Swell by Dynamic Voltage Restore Using Synchronous Reference Frame Theory." International Journal for Research in Applied Science and Engineering Technology 6, no. 4 (2018): 661–68. http://dx.doi.org/10.22214/ijraset.2018.4113.

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Praveen, Koyyana. "Compensation of Voltage Dip and Voltage Swell by Dynamic Voltage Restore using Synchronous Reference Frame Theory." International Journal for Research in Applied Science and Engineering Technology 7, no. 4 (2019): 793–99. http://dx.doi.org/10.22214/ijraset.2019.4143.

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Praveen, Koyyana. "Compensation of Voltage Dip and Voltage Swell by Dynamic Voltage Restorer using Synchronous Reference Frame Theory." International Journal for Research in Applied Science and Engineering Technology 7, no. 5 (2019): 2897–903. http://dx.doi.org/10.22214/ijraset.2019.5477.

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Ayoub, Ayesha, Muhammad Siddique, Ahsan Iqbal, and Hassan Ali. "Voltage Quality Enhancement in Microgrid Through Customized Synchronous Reference Frame Theory Based Upgraded Dynamic Voltage Restorer." Pakistan Journal of Engineering and Technology 3, no. 2 (2020): 81–87. http://dx.doi.org/10.51846/vol3iss2pp81-87.

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Microgrid (MG) offers an elaborate list of solutions to solve the common problems associated with local distribution systems. These problems are mainly reliability issues. Researchers are trying to develop improvements in its properties and features to overcome these problems as well as the ones regarding power quality (PQ). The standard microgrid structure does not support power quality compensation strategies, which is why there are distribution system issues related to it. Implementations of the DVR have been proposed at both a low voltage (LV) level, as well as a medium voltage (MV) level; and give an opportunity to protect high power sensitive loads from voltage sags, because it is a very efficient. We have proposed in this paper about the Upgraded Dynamic Voltage Restorer (UDVR) and mentioned that it I will provide a convenient solution to the voltage sag and swell in grid-connected microgrid problems. A microgrid structure provides a reliable distribution system for local loads on the other side, UDVR allows a sag/swell free power supply for loads. This control via UDVR comes from a fuzzy technique system and an Upgraded Synchronous Reference Frame (USRF) concept. The dynamic compensation characteristics of UDVR are applied to voltage transient disturbance analysis under various run conditions. The proposed control system's stability is also analyzed. The entire system is manufactured by utilizing the MATLAB/Simulink environment. The results of the simulation confirmed the performance of UDVR under the proposed control approach. Simulation results prove that the proposed method is correct and has better real-time and compensation flexibility.

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Singh, Bhim, and Ram Niwas. "Single-Phase Power Generation Using Three-Phase Self-Excited Synchronous Reluctance Generator." International Journal of Emerging Electric Power Systems 15, no. 4 (2014): 377–88. http://dx.doi.org/10.1515/ijeeps-2014-0006.

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Abstract This paper presents the single-phase power generation using a three-phase synchronous reluctance generator (SyRG) for a standalone diesel generator (DG) set based standalone supply system. A static compensator (STATCOM) is used for voltage control, harmonics reduction and load balancing on SyRG. The proposed system consists of a SyRG, a variable frequency drive of an induction motor used as a prototype of diesel engine (DE), a STATCOM and single-phase loads. The proposed system feeds single-phase loads in rural areas and telecom towers. The synchronous reference frame theory (SRFT)–based control algorithm is used for the control of STATCOM used for voltage control and load balancing of SyRG.

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M. Shukla, Darshni, Naimish Zaveri, and Tole Sutikno. "The performance of a multilevel multifunctional solar inverter under various control methods." Bulletin of Electrical Engineering and Informatics 12, no. 5 (2023): 2717–32. http://dx.doi.org/10.11591/eei.v12i5.4097.

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Photovoltaic (PV) inverters are now supposed to provide additional supporting services with more reliability and efficiency. This paper presents three different control methods for generating reference current in a multifunctional, multilevel grid-tied PV inverter for harmonic, reactive, and unbalance compensation. These methods are the synchronous reference frame (SRF) theory (d-q), the instantaneous reactive power (IRP) theory (p-q), and the conservative power theory (CPT). As a result, the primary goal is to propose a low-cost multifunctional solar invert for distributed generation, with an appropriate prototype developed in the laboratory for experimental validation of various modes of operation. Demonstrated results show that the presented inverter is capable of providing various ancillary services with all three types of control.

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Dharmalingam, Rajasekaran, Subhransu Sekhar Dash, Karthikrajan Senthilnathan, Arun Bhaskar Mayilvaganan, and Subramani Chinnamuthu. "Power Quality Improvement by Unified Power Quality Conditioner Based on CSC Topology Using Synchronous Reference Frame Theory." Scientific World Journal 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/391975.

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This paper deals with the performance of unified power quality conditioner (UPQC) based on current source converter (CSC) topology. UPQC is used to mitigate the power quality problems like harmonics and sag. The shunt and series active filter performs the simultaneous elimination of current and voltage problems. The power fed is linked through common DC link and maintains constant real power exchange. The DC link is connected through the reactor. The real power supply is given by the photovoltaic system for the compensation of power quality problems. The reference current and voltage generation for shunt and series converter is based on phase locked loop and synchronous reference frame theory. The proposed UPQC-CSC design has superior performance for mitigating the power quality problems.

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Goggi Kirshna Sanyasi Rao and P.Murari. "Mitigation of Harmonics in Three - Phase Three - Wire System by using Fuzzy Logic Controlled Shunt Active Filters." November 2020 6, no. 11 (2020): 87–91. http://dx.doi.org/10.46501/ijmtst061115.

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This paper shows the method of improving the power quality using shunt active power filter. In order to protect the supply system from current harmonics, we have to use the active power filters. These are used to compensate the reactive power compensation, but the performance of active power filters are based on various control strategies. This paper presents the complete examination to estimate the working of SHAF for generating the current references under steady and transient for balanced, unbalanced and non-sinusoidal conditions by using PI controller. The P-Q theory and synchronous reference frame theory, which are widely used in SHAF. The most validate results obtained by simulation with matlab/simulink software are carried out with PI controller for P-Q control theory for various voltage conditions like balanced, unbalanced and non-sinusoidal conditions and dynamic load changes.

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Shakya, Dr Subarna. "Vehicle Drive Control Using Fuzzy Based PI Speed Controller." Journal of Electrical Engineering and Automation 2, no. 2 (2020): 68–75. http://dx.doi.org/10.36548/jeea.2020.2.002.

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This paper proposes a fuzzy PI speed controller which is used in electric vehicle’s drive control system insensitive to parameter change and disturbance, using fuzzy control theory. A permanent magnet synchronous motor (PMSM) is modelled mathematically in d-q reference frame. In this paper, a sliding model and fuzzy control theory are used to simulate the PMSM models using fuzzy control theory. Simulink software is used to analyze and simulate the simulation models which show that the proposed PI control based on fuzzy logic will have better anti-interference, better dynamic performance, and faster dynamic response speed when compared with the sliding motor control. Hence the proposed methodology is considered to be the ideal control method with a predefined vector control reference value for the electric vehicle’s motor.

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Zhang, Jian-Ya, Qiang Zhou, and Kai Wang. "Dual Three-Phase Permanent Magnet Synchronous Machines Vector Control Based on Triple Rotating Reference Frame." Energies 15, no. 19 (2022): 7286. http://dx.doi.org/10.3390/en15197286.

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This paper presents a triple rotating coordinate transformed vector control method for dual three-phase permanent magnet (PM) machines. In the proposed scheme, the control variables are converted to three sets of αβ components directly, which are 120° electric degrees different from each other. It omits the complicated six-dimensional transformed matrix and reduces the computation greatly. The relationship with vector space (VSD) control was mathematically analyzed. By ensuring the consistency of control variables in the three stationary reference frames, the suggested method can not only achieve the same fundamental control performance as VSD but compensate for the imbalance current caused by the harmonics in the back electromotive force. In addition, the proposed method belongs to multi redundancy control in theory, which is maybe a good solution for fault-tolerant operation. Finally, a prototype dual three-phase PM machine was tested. The experimental results are in good agreement with the theoretical analysis.

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Rao, H. V. Gururaja, R. C. Mala, and Ambika Joshi. "Motor side active power filter for induction motor." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 4 (2020): 1711. http://dx.doi.org/10.11591/ijpeds.v11.i4.pp1711-1718.

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Power quality is an important aspect in electrical distribution and utilization systems. Variable frequency drive (VFD) controlled induction motors are widely used in industries. The output current of VFD which is nonsinusoidal is given to the induction motor. This paper proposes a motor side active power filter (MSAPF) so as to provide a pure sinusoidal current to the induction motor. An evaluation of two control strategies has been discussed in this paper i.e. Synchronous Reference Frame (SRF) theory and Instantaneous Reactive Power theory (IRPT) in the generation of the reference signal. These techniques are simulated in MATLAB/SIMULINK environment. These simulations demonstrate the reduction in total harmonic distortion (THD) in the motor current with active filter connected to the motor side.

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H., V. Gururaja Rao, C. Mala R., and Joshi Ambika. "Motor side active power filter for induction motor." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 4 (2020): 1711–18. https://doi.org/10.11591/ijpeds.v11.i4.pp1711-1718.

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Power quality is an important aspect in electrical distribution and utilization systems. Variable frequency drive (VFD) controlled induction motors are widely used in industries. The output current of VFD which is nonsinusoidal is given to the induction motor. This paper proposes a motor side active power filter (MSAPF) so as to provide a pure sinusoidal current to the induction motor. An evaluation of two control strategies has been discussed in this paper i.e. synchronous reference frame (SRF) theory and Instantaneous reactive power theory (IRPT) in the generation of the reference signal. These techniques are simulated in MATLAB/Simulink environment. These simulations demonstrate the reduction in total harmonic distortion (THD) in the motor current with active filter connected to the motor side.

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Sree Jyothi, Khammampati R., P. Venkatesh Kumar, and J. JayaKumar. "A Review of Different Configurations and Control Techniques for DSTATCOM in the Distribution system." E3S Web of Conferences 309 (2021): 01119. http://dx.doi.org/10.1051/e3sconf/202130901119.

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This paper presents a review of DSTATCOM Topologies and power quality control Techniques. The used topologies are Three-phase Three-wire and Three-phase four-wire and control techniques are Instantaneous reactive power theory(IRP), Synchronous Reference Frame Theory(SRF), Model Predictive Control (MPC), Sliding mode control(SMC), Adaptive Neuro-fuzzy interface systems(ANFIS) and Artificial intelligence based controllers. These control techniques are used to mitigate the reactive power compensation, load balancing, Neutral current compensation, harmonics reduction and maintains the Total harmonic Distortion in IEEE519 standards. Performance investigated in Single-phase Distribution systems by connecting with STATCOM and without DSTATCOM in MATLAB/SIMULINK

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Mohamadrez, Y., M. B. Bana Sharifian, M. R. Feyzi, and S. H. Hosseini. "Design and Simulation of UPQC by Synchronous Reference Frame Theory Considering Loading of Series and Shunt Inverters." Journal of Applied Sciences 9, no. 14 (2009): 2599–605. http://dx.doi.org/10.3923/jas.2009.2599.2605.

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Mr., ABHIJIT A. INGALE, and KOMPELLI SANTHOSH Prof. "HARMONICS REDUCTION WITH Id-Iq CONTROL STRATEGY USING FUZZY LOGIC CONTROLLER BASED THREE PHASE SHUNT ACTIVE POWER FILTER." JournalNX - A Multidisciplinary Peer Reviewed Journal 2, no. 5 (2016): 10–15. https://doi.org/10.5281/zenodo.1470222.

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Shunt active power filters found the application in elimination of current harmonics in power system. The performance of such filter depends upon various factors like control methods, inverter used, and reference current generation technique. In this paper the authors have implemented fuzzy logic control technique for generation of pulses of the three phase inverter. Harmonic extraction is mainly achieved by a band pass filter in synchronous reference frame algorithm (SRF) or Id-Iq theory. The performance of the shunt active power filter is evaluated with MATLAB/ SIMULINK under balanced voltage conditions. After evaluation authors have found that the harmonic elimination is achieved satisfactorily. https://journalnx.com/journal-article/20150073

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Saravanan, Ragavan, and P. S. Manoharan. "Performance Analysis of Unified Power Quality Conditioner for Power Quality Improvement." Applied Mechanics and Materials 573 (June 2014): 690–95. http://dx.doi.org/10.4028/www.scientific.net/amm.573.690.

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The Unified Power Quality Conditioner plays an important role in the constrained delivery of electrical power from a source to an isolated pool of load or from a source to the grid. This article is presented new control approaches for both series and shunt inverter. The proposed control algorithm for series and shunt converters based on FLC and synchronous reference frame theory respectively. The proposed approach eliminates the total harmonic distortions (THD) efficiently, and mitigates sag and swell present in the linear and nonlinear loads.

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Mihir B. Chaudhari. "Implementation of Shunt Active Power Filter Using DSP Controller Based on Synchronous Reference Frame for Harmonic Mitigation." Journal of Electrical Systems 20, no. 10s (2024): 2043–48. http://dx.doi.org/10.52783/jes.5529.

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This research paper introduces the concept of a shunt active power filter (SAPF) that leverages synchronous-reference-frame (SRF) theory to mitigate harmonics in the power system. The SAPF works by injecting a compensating current at the point of common coupling (PCC) to counteract the harmonics in the line and restore sinusoidal current waveforms. It employs a three-phase current-controlled voltage source inverter (VSI) with a DC link capacitor for active filtering. An SRF algorithm is designed for a low-voltage laboratory prototype utilizing the TMS320F28335 Digital Signal Processor (DSP). The experimental findings affirm that the control strategy effectively aligns with the recommended harmonic standard limits of IEEE 519-1992.

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Ganthia, Bibhu, and Chinmoy Kumar Panigrahi Panigrahi. "Power Quality and Low Voltage Ride Through Capability Enhancement in Wind Energy System Using Unified Power Quality Conditioner (UPQC)." ECS Transactions 107, no. 1 (2022): 5655–62. http://dx.doi.org/10.1149/10701.5655ecst.

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The various approaches used to improve the Low Voltage Ride Through (LVRT) capabilities of DFIG-based wind turbine systems are investigated in this study (WT). The Type-III WT machine, which is primarily based on DFIG, is connected to the grid without a digital power interface, resulting in unmanageable terminal voltage or reactive electricity output. As a consequence, novel LVRT approaches based on the deployment of additional active interface technologies were given in this work. The problem of low voltage faults is now being addressed using a variety of approaches. By analyzing LVRT approaches for DFIG-based WECS, this research attempts to discover such working ways by bridging the gap in terms of overall adaptive performance, operative complexity of controllers, and cost-effectiveness. This study suggests ways to improve LVRT's ability to rely on the relationship arrangement in three major areas based on their grid integrations. The wind turbine system is connected to a DVR, STATCOM, and UPQC in this study for active and reactive power regulation throughout the fault detection procedure. Using UPQC with SRF theory offers improved reaction during faults to increase active power and maximum compensation in reactive power with synchronous reference frame and without synchronous reference frame operation presented in this paper.

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Kutt, Filip, Michal Michna, and Grzegorz Kostro. "Multiple Reference Frame Theory in the Synchronous Generator Model Considering Harmonic Distortions Caused by Nonuniform Pole Shoe Saturation." IEEE Transactions on Energy Conversion 35, no. 1 (2020): 166–73. http://dx.doi.org/10.1109/tec.2019.2951858.

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El Ghaly, Abdallah, Mohamad Tarnini, Nazih Moubayed, and Khaled Chahine. "A Filter-Less Time-Domain Method for Reference Signal Extraction in Shunt Active Power Filters." Energies 15, no. 15 (2022): 5568. http://dx.doi.org/10.3390/en15155568.

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Current distortion degrades power quality and affects system performance, especially for sensitive loads that require pure sinusoidal waves. Owing to its excellent dynamic response, a well-designed active power filter (APF) can achieve a total harmonic distortion (THD) within the acceptable limits defined by IEEE 3002 standards through compensating harmonic distortions. The APF consists of two main modules: a reference signal extraction module and a modulation module. This paper adapts the matrix pencil method, a well-known model-based parameter estimation technique, to the problem of reference extraction. Contrary to conventional time-domain methods such as the synchronous reference frame (SRF) and the reactive power theory (PQ theory) that rely on low-pass filters in their implementations, the proposed method does not use a filter. However, it extracts the reference signal by first decomposing the load current into its constituent frequency components, and then subtracting the pure sine wave synthesized from the obtained fundamental component from the load current. Results on simulated data from MATLAB/Simulink confirm the higher accuracy and fast response time of the proposed method in extracting the reference signal.

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Lokhande, Rushikesh. "Comparison of SRF and IRPT Algorithm for Mitigation of Voltage Sag and Voltage Swell using NPC based D-STATCOM." International Journal for Research in Applied Science and Engineering Technology 9, no. VII (2021): 3932–39. http://dx.doi.org/10.22214/ijraset.2021.37219.

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This study describes a systematic model of Distribution STATCOM (D-STATCOM) to reduce voltage sag, and swell using Instantaneous reactive power theory also called Power Quality theory (IRPT or PQ) and Synchronous reference frame theory (SRF) using NPC three level inverter. Power quality is an event that manifests as an abnormal frequency, current and voltage resulting in the failure of end-use equipment. The main issues addressed here are voltage sag and swell. Custom power devices are utilised to overcome this problem. The Distribution STATCOM (D-STATCOM) is one of these devices, and it is the most efficient and effective modern specialized power device utilised in distribution system network. The simulation of D-STATCOM is done using MATLAB/Simulink and voltage sag and swell are mitigated.

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Reddy, S. R., P. V. Prasad, and G. N. Srinivas. "Design of PI and Fuzzy Logic Controllers for Distribution Static Compensator." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 2 (2018): 465. http://dx.doi.org/10.11591/ijpeds.v9.i2.pp465-477.

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This paper presents study of distribution static compensator (D-STATCOM) for compensation of reactive power, harmonic distortion mitigation and load balancing in three phase three wire nonlinear load distribution system. The proposed control algorithm is developed based on synchronous reference frame theory using PI and FUZZY logic controller. The obtained reference current signal from control algorithm is compared in hysteresis band current controller for better switching of D-STATCOM. The performance of DSTATCOM with PI and fuzzy logic controller is also analysed and compared for DC voltage regulation and harmonic distortion mitigation .The proposed method is provided effective compensation for reactive power, harmonic distortion mitigation and load voltage balancing. The simulation results are obtained using MATLAB/SIMULINK soft ware.

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Balasubramanian, R., K. Parkavikathirvelu, R. Sankaran, and Rengarajan Amirtharajan. "Design, Simulation and Hardware Implementation of Shunt Hybrid Compensator Using Synchronous Rotating Reference Frame (SRRF)-Based Control Technique." Electronics 8, no. 1 (2019): 42. http://dx.doi.org/10.3390/electronics8010042.

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This paper deals with the design, simulation, and implementation of shunt hybrid compensator to maintain the power quality in three-phase distribution networks feeding different types balanced and unbalanced nonlinear loads. The configuration of the compensator consists of a selective harmonic elimination passive filter, a series-connected conventional six-pulse IGBT inverter, acting as the active filter terminated with a DC link capacitor. The theory and modelling of the compensator based on current harmonic components at the load end and their decomposition in d-q axis frame of reference are utilized in the reference current generation algorithm. Accordingly, the source current waveform is made to follow the reference current waveform using a high-frequency, carrier-based controller. Further, this inner current control loop is supported by a slower outer voltage control loop for sustaining desirable DC link voltage. Performance of the compensator is evaluated through MATLAB simulation covering different types of loads and reduction of harmonic currents and THD at the supply side along with excellent regulation of DC link voltage are confirmed. The performance of a hybrid compensator designed and fabricated using the above principles is evaluated and corroborated with the simulation results.

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da Costa, Israel Divan Lopes, Danilo Iglesias Brandao, Seleme Isaac Seleme, and Lenin Martins Ferreira Morais. "Torque Control for PMSG-Based Wind-Power System Using Stationary abc-Reference Frame." Energies 15, no. 21 (2022): 8060. http://dx.doi.org/10.3390/en15218060.

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The power system of wind farms is generally characterized by a weak grid, in which voltages may be heavily distorted and imbalanced, challenging the control scheme of wind-power converters that must be impervious to such disturbances. The control scheme in the stationary natural abc-frame has shown good performance under non-ideal voltage conditions, and then this paper proposes to analyze the operational performance of a wind-power system based on a permanent magnet synchronous generator subject to non-ideal conditions of the grid voltage, with its control scheme devised in the abc-reference frame. The proposed control scheme considers the torque control decoupling the flux and torque for the generator-side, showing the possibility to implement the machine torque control, without any coordinates transformation using a closed loop dot-product approach, between the field flux and stator currents. For the grid-side converter, the load current compensation is proposed, using the load current decomposition and conservative power theory (CPT), improving the grid power quality. The simulation results estimate the performance of the grid-side control under distorted and asymmetrical voltages, and the generator-side control against torque disturbances due to wind speed variation. Finally, experimental results in a small-scale test bench validate the proposed control scheme in injecting active and reactive power into the grid, and the torque control under wind speed variation.

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R.REDDY, S., P. V.PRASAD, and G. N.SRINIVAS. "VSI Based DSTATCOM for Compensating Nonlinear and Unbalanced Loads." International Journal of Engineering & Technology 7, no. 3.3 (2018): 54. http://dx.doi.org/10.14419/ijet.v7i3.3.14485.

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This paper presents study of distribution static compensator (D-STATCOM) for compensation of neutral current, source&PCC current harmonic distortion, PCC voltage regulation and compensation of unbalanced current waveform for the three phase four wire nonlinear and unbalanced load medium voltage distribution system. The proposed control algorithm is developed based on synchronous reference frame theory with PI controller. The obtained reference current signal from control algorithm is compared in hysteresis band current controller for better switching of D-STATCOM. The performance of system without & with D-STATCOM is also analysed and compared. The proposed control method is implemented on 11/0.4kv medium voltage distribution system and it is provided effective compensation for reactive power and harmonic distortion mitigation. The simulation results are obtained using MATLAB/SIMULINK.

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CHENNAI, Salim. "Unified Power Quality Conditioner Performance based on Multi-level Inverter Topologies using Intelligent Controllers." Algerian Journal of Signals and Systems 7, no. 3 (2022): 109–16. http://dx.doi.org/10.51485/ajss.v7i3.166.

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This paper presents unified power quality conditioner (UPQC) system based on three-level neutral point clamped (NPC) using Fuzzy and ANN controllers. The proposed UPQC is able to mitigate source current harmonics and compensate all voltage disturbances. It is designed by the integration of series and shunt active filters (AFs) sharing a common DC bus capacitor. The DC voltage is maintained constant using proportional integral voltage controller. The synchronous reference frame (SRF) theory is used to get the reference signals for the shunt APF and the power reactive theory (P-Q theory) for the series APF.Conventional control schemes require complex calculations, the use of intelligent systems help to reduce the control system size and the operation complexity. The shunt and series active power filter (APF) reference signals derived from the control algorithm are injected in Fuzzy and Ann intelligent controllers to generate switching signals. The performances of the proposed UPQC system are evaluated using Matlab-Simulink software and SimPowerSystem Toolbox under various operation conditions. The simulation results show the performance of the proposed UPQC based on intelligent controllers to improve the power quality in steady and transient conditions operation.

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Banik, Deepayan. "Planetary Rhythms: Synchronous Circulation on Variably Irradiated Asynchronous Planets." Astrophysical Journal 980, no. 2 (2025): 246. https://doi.org/10.3847/1538-4357/adabc4.

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Abstract Tidal locking of planets to their host stars results in an atmospheric circulation with a hotspot fixed to the frame of reference of the planet. On the other hand, asynchronously rotating planets feature moving hotspots either lagging or leading the corresponding substellar point as it translates along the surface. We show that a planet falling in the latter category could mimic the circulation of tidally synchronous planets under the influence of time-varying instellation, possibly provided by pulsating or multiple star systems. This happens when the planet’s diurnal period is in resonance with the period of instellation variation, leading to a planet-frame-fixed hotspot. Slight differences in the above periods lead to east–west or west–east creeping hotspots with a period significantly longer than both. The rate of hotspot motion is given by the difference between the diurnal and instellation variation rates, similar to the lower envelope frequency of beat patterns formed by two superposed waves in linear wave theory. We call this phenomenon “beating.” A combination of the radiative, rotational, wave propagation, and drag timescales establishes dynamical constraints on beating. Based on this, we classify a set of Kepler and TESS circumbinary planets with two candidates exhibiting climatic departures from the no-variation scenario. In general, hotter and faster-spinning planets are more susceptible to climatic departures. Beating, if it occurs, may additionally create optimistic extensions of habitable zones for corresponding systems.

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Chilipi, Rajasekhara Reddy, Bhim Singh, and Srinivasa Murthy. "A New Voltage and Frequency Controller for Standalone Parallel Operated Self Excited Induction Generators." International Journal of Emerging Electric Power Systems 13, no. 1 (2012): 1–17. http://dx.doi.org/10.1515/1553-779x.2809.

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This work proposes a new voltage and frequency controller (VFC) for standalone parallel operated self excited induction generators driven by uncontrolled micro hydro turbines. This VFC consists of a current controlled static compensator (STATCOM) for regulating the voltage during different load conditions and a variable frequency induction motor drive driving a water pump operating as an electronic load controller (ELC) for balancing the generated power, which in turn regulates the system frequency. The STATCOM functions as a reactive power compensator for regulating the system voltage and an active filter for harmonics elimination. The control algorithm of STATCOM is based on the synchronous reference frame (SRF) theory.

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Alzubaidi, Ahmed Mohammed Mohsin, and P. V. Ramana Rao. "Power Quality Improvement in Distribution System Using Parallel DSTATCOM." International Journal of Engineering & Technology 7, no. 4.24 (2018): 9. http://dx.doi.org/10.14419/ijet.v7i4.24.21762.

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DSTATCOM is one among FACTS controllers to reduce harmonic effect in power system. Presence of non-linear loads induces harmonics to source components which in-turn affects other sensitive loads. Parallel custom devices share the compensating currents and as a result stress on individual custom device reduces. This paper presents power quality improvement using parallel DSTATCOM in power distribution system. The parallel DSTATCOM are controlled with a common single control scheme using synchronous reference frame theory. Proposed concept was implemented with MATLAB/SIMULINK software and results were discussed considering different loading conditions of the proposed system like balanced case non-linear load and unbalanced case non-linear load conditions.

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Arafa, Osama M., Mona M. Mamdouh, Ahmed Mansour, and Zeinab Elkady. "Harmonics elimination and reactive power compensation based on novel SDFT-PLL shunt active power filter control approach." International Journal of Power Electronics and Drive Systems (IJPEDS) 16, no. 1 (2025): 298. https://doi.org/10.11591/ijpeds.v16.i1.pp298-310.

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Active power filters are used to reduce current harmonics and compensate for reactive power in non-linear loads. This paper compares two approaches for estimating compensated current for a shunt active filter. The synchronous-reference- frame theory d-q and sliding fast Fourier-Transform algorithms are compared in this study. The comparison is based on the outcomes of simulations. For different load conditions, the results achieved by the approaches mentioned differ greatly. The sliding discrete Fourier transform SDFT approach has revealed the optimum choice. Indeed, sliding discrete Fourier transform-phase-locked-loop or SDFT-PLL is a perfect method also for synchronizing the inverter with a weak noisy grid.

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Arafa, Osama M., Mona M. Mamdouh, Ahmed Mansour, and Zeinab Elkady. "Harmonics elimination and reactive power compensation based on novel SDFT-PLL shunt active power filter control approach." International Journal of Power Electronics and Drive Systems 16, no. 1 (2025): 298–310. https://doi.org/10.11591/ijpeds.v16.i1.pp298-310.

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Prasad, Dinanath, Narendra Kumar, and Rakhi Sharma. "SRF theory-based shunt active power filter for power quality improvement in grid-interfaced solar photovoltaic system." Journal of Physics: Conference Series 2570, no. 1 (2023): 012024. http://dx.doi.org/10.1088/1742-6596/2570/1/012024.

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Abstract This paper uses Shunt Active Power Filter (SAPF) in a polluted and unbalanced mains voltage for the compensation of current harmonics along with the reactive power. During compensation the reference current is calculated by the theory of Synchronous Reference Frame (SRF). This study utilizes the Photovoltaic (PV) energy, a renewable energy source, for which a maximum power point tracking (MPPT) method, an incremental conductance (InCnd), is employed. To modify the energy storage of dc-voltage, an artificial neural network controller (ANN) is used. The power system toolbox of MATLAB/SIMULINK is used to simulate the system being proposed. The SAPF is compared and assessed on the basis of PI control, FUZZY controller, and Artificial Neural Network (ANN). The results demonstrate the ANN control’s efficiency in optimizing the DC capacitor energy storage, sinusoidal form of the current, and reactive power compensation. A low Total Harmonic Distortion (THD) will be achieved with the proposed system which shows the efficacy of the method presented.

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Nidhi, Sahu, and Sahu Sandeep. "Performance analysis of shunt active filter based on srf theory using metaheuristic optimization technique for nonlinear loads." i-manager's Journal on Circuits and Systems 10, no. 1 (2022): 15. http://dx.doi.org/10.26634/jcir.10.1.18845.

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Power electronic devices play a vital role in manufacturing process, research and development because it delivers high efficiency, low cost, rapid operation, and optimal size. In recent years, power electronic devices have become widely employed in a variety of fields. Harmonics have a substantial impact on power systems and the main sources of harmonics are nonlinear loads and energy conversion devices such as static converters, choppers, cyclo-converters, battery charging systems, and heating elements, among others. To reduce harmonics, different filtration technologies are available, with the shunt active power filter being one of the most significant and effective. The performance of a shunt active power filter based on synchronous reference frame theory is explored and the efficiency is improved utilising the satin bower bird optimization approach.

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Ullah, Ikram. "Synchronization of Active Power Filter under Distorted Grid Conditions." International Journal of Robotics and Control Systems 1, no. 3 (2021): 378–89. http://dx.doi.org/10.31763/ijrcs.v1i3.464.

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Advancement in technology has resulted in increased use of electrical energy. The trend of using energy-saving appliances is also increased considerably. Harmonic currents have been increased in power systems due to the large-scale use of nonlinear loads. Shunt Active Power Filter (SAPF) is the most widely used technique for the compensation of current harmonics. Under adverse grid conditions performance of SAPF is affected badly. In this paper, a modified synchronous reference frame theory is proposed for current reference generation by incorporating an advanced phase-locked loop technique for the estimation of frequency and phase. The proposed approach results in an accurate extraction of reference current in the presence of various grid disturbances. Matlab/Simulink environment is used for evaluating the performance. The results achieved show excellent performance of the proposed technique in terms of reducing harmonics distortion and dynamic response. The total harmonics distortion of the compensated source current is reduced to a value well within the limits of the IEEE-519 standard.

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Et.al, M. Balasubramanian. "Solar Pv Fed Grid Connected System With Reactive Power And Harmonics Compensation." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 3 (2021): 3417–28. http://dx.doi.org/10.17762/turcomat.v12i3.1608.

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The aim of this paper is to use renewable energy sources to meet the demand for electricity. For DC-AC conversion, a solar-powered three-phase grid-connected system with a boost (DC-DC) converter and three-phase inverter is used. The updated Perturb and Observe (P&O) Algorithm is used to map the solar photovoltaic system's maximum power point. Synchronous Reference Frame-Phase Locked Loop Theory is used to compensate for harmonic and reactive power. This proposed grid-connected system is used to improve the system's power efficiency as well as extract the full power and feed it to the distribution system. Using Matlab tools, the simulation result demonstrates reasonable efficiency.

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Kalal, Vijay Kumar, and Shankaralingappa Channappa Byalihal. "Enhancement of large PV-integrated grid stability using an advanced UPQC." International Journal of Power Electronics and Drive Systems (IJPEDS) 16, no. 2 (2025): 1184. https://doi.org/10.11591/ijpeds.v16.i2.pp1184-1195.

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This paper presents an enhancement to the stability of large PV-integrated grids using an advanced power quality control system. The proposed unified power quality conditioner (UPQC) system control technique combines synchronous reference frame (SRF) theory and modified unit vector template generation (MUVTG), supplemented by an additional proportional-integral-derivative (PID) controller to regulate reactive power flow to the grid. The results indicate a reduction in the total harmonic distortion (THD) levels. The study also demonstrates the system’s stability for different harmonic orders and various cases of voltage sag and swell, in compliance with IEEE standards. The proposed approach effectively addresses power quality issues and achieves a THD of 0.30%, meeting the IEEE-519 standards using MATLAB Simulink.

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