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Journal articles on the topic 'Single Reference Frame (SRF)'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Lee, Jung-Yong, and Younghoon Cho. "Synchronous Reference Frame Repetitive Control of a Single-Phase Three-Level Dual-Buck Photovoltaic Inverter." Electronics 7, no. 10 (2018): 226. http://dx.doi.org/10.3390/electronics7100226.

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This paper proposes a synchronous reference frame (SRF) control strategy for a single-phase, three-level, dual-buck photovoltaic (PV) inverter. The concept of virtual d-q transformation is adapted to the current control of the inverter, and the repetitive controller is implemented in the SRF. With the proposed control strategy, the memory allocation quantity for the repetitive controller is decreased and the capability of the current reference tracking is maximized. Thus, the proposed method significantly reduces the total harmonic distortion (THD) of the output current in both the continuous

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2

Tham, Zhen Ye, Yap Hoon, and Mohd Amran Mohd Radzi. "Synchronous Reference Frame with Finite Impulse Response Filter for Operation of Single-phase Shunt Active Power Filter." MATEC Web of Conferences 335 (2021): 02004. http://dx.doi.org/10.1051/matecconf/202133502004.

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Power Quality (PQ) has been recognized as one of the main issues in electricity supply worldwide after the invention of nonlinear load. In 2017, PQ problem leads to significant economic losses in the Pan European region. Therefore, Active Power Filter has been developed during the past two decades to improve the harmonic compensation, reactive power, and voltage balance. In this research, the evaluation of the Synchronous Reference Frame (SRF) method is done under nonlinear load condition. The objective of this research is to modify the harmonic extraction algorithm based on SRF concepts for t

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3

Jeraputra, Chuttchaval, Jetnarong Pongpaiboon, Thamvarit Singhavilai, and Supun Tiptipakorn. "Phase Lead-Lag Synchronous Reference Frame Phase-locked loop for Grid Synchronization of a Single-Phase Inverter." ECTI Transactions on Electrical Engineering, Electronics, and Communications 20, no. 1 (2022): 123–32. http://dx.doi.org/10.37936/ecti-eec.2022201.246117.

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In this study, a phase lead-lag synchronous reference frame phase-locked loop (SRF-PLL) is proposed for the grid connection of a single-phase inverter. A tuned filter is employed to enable the phase of the input voltage to be advanced or delayed by ±45 degrees with respect to the grid voltage. The generated orthogonal signals are fed into Park's transformation. Only the quadrature-phase signal is regulated to zero using a PI controller. Its output determines the estimated frequency. The phase angle is obtained by integrating the estimated frequency. The linearized model of the proposed SRF-PLL

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4

Patnaik, Nishant, Richa Pandey, Raavi Satish, Balamurali Surakasi, Almoataz Y. Abdelaziz, and Adel El-Shahat. "Single-Phase Universal Power Compensator with an Equal VAR Sharing Approach." Energies 15, no. 10 (2022): 3769. http://dx.doi.org/10.3390/en15103769.

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In this manuscript, we propose a single-phase UPC (universal power compensator) system to extensively tackle power quality issues (voltage and current) with an equal VAR (volt-ampere reactive) sharing approach between the series and shunt APF (active power filter) of a UPC system. The equal VAR sharing feature facilitates the series and shunt APF inverters to be of an equal rating. An SRF (synchronous reference frame)-based direct PA (power angle) calculation technique is implemented to realize equal VAR sharing between the APFs of the UPC. This PA estimation utilizes d and q axis current para

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Rahman, Atta, Irtaza Syed, and Mukhtar Ullah. "Small-Signal Stability Criteria in AC Distribution Systems—A Review." Electronics 8, no. 2 (2019): 216. http://dx.doi.org/10.3390/electronics8020216.

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AC distribution grid is prone to instability due to negative impedance and constant power nature of the load if it is dominant with power electronics-based components. There are various time-domain and frequency-domain modelling methods which use various methodologies and analytical tools. Also, there are many small-signal stability analysis (SSSA) methods and their different variants for different specific conditions and situation. This paper presents a review of SSSA methods in AC distribution grid using impedance-based models in a synchronous reference frame (SRF). By simplifying and conver

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Shuchi, Vishnoi, and Bhalla Manish. "Power Quality Improvement using UPQC with Single and Three-Phase Non-linear Loads in Countryside Areas." International Journal of Soft Computing and Engineering (IJSCE) 9, no. 4 (2019): 18–24. https://doi.org/10.35940/ijsce.C3281.119419.

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This paper is intended to simulate a power quality conditioning device, Unified Power Quality Conditioner (UPQC), in countryside areas for non-linear loading. From past decades there is much increase in the requirement of the good quality electrical power in single phase distribution grids established in these locations. Due to technical advancement, three-phase loads are practiced more than single phase loads so that the demand for three phase distribution grids is growing. But the installation process of three-phase grids, at countryside areas, is not an economic option and to get access to

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Singh Thakur, Hitendra, and Ram Narayan Patel. "Design of Neuro-Fuzzy Controller for Stabilization of Single Phase Stand-Alone PV Power System." IAES International Journal of Robotics and Automation (IJRA) 7, no. 3 (2018): 176. http://dx.doi.org/10.11591/ijra.v7i3.pp176-184.

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For the three phase power electronic and drive applications, vector control or the synchronous reference frame (SRF) based control concept is well accepted and settled amongst the research communities. Although the SRF concept has gained popularity and appreciation in developing the three phase controllers, still the concept has not reached the same level in case of a single phase system. The work presented in this paper is mainly concerned to the design of a hybrid Artificial Neural Network and Fuzzy Logic based controller for a single phase stand-alone photo-voltaic (PV) power system. The ad

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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 harmon

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9

Arulmurugan, R. "Design and testing of stability improvement of nine multi-level H-inverter for distribution system." IAES International Journal of Robotics and Automation (IJRA) 8, no. 4 (2019): 245–55. https://doi.org/10.11591/ijra.v8i4.pp245-255.

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In this article, a solitary phase nine-level series connected H-Bridge powered by photovoltaic MPPT based SHAPF in view of basic controller is proposed. SRF is utilized for reference input current extraction and to create pulses for the SHAPF. The principle point of the cascaded bridge is to dispense harmonics, enhance power factor and reactive energy compensation of the single-phase distribution framework. The suggested control calculation has two parts, changing the load current into stationary reference outline directions and estimation of peak amplitude of load currents. Consequently, a ba

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10

Vishnoi, Shuchi. "Power Quality Improvement using UPQC with Single and Three-Phase Non-linear Loads in Countryside Areas." International Journal of Soft Computing and Engineering 9, no. 4 (2019): 18–24. http://dx.doi.org/10.35940/ijsce.c3281.119419.

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This paper is intended to simulate a power quality conditioning device, Unified Power Quality Conditioner (UPQC), in countryside areas for non-linear loading. From past decades there is much increase in the requirement of the good quality electrical power in single phase distribution grids established in these locations. Due to technical advancement, three-phase loads are practiced more than single phase loads so that the demand for three phase distribution grids is growing. But the installation process of three-phase grids, at countryside areas, is not an economic option and to get access to

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11

Kumar, Ajay, Nitin Gupta, and Vikas Gupta. "Dynamic Performance Improvement of Grid Interfaced Solar Photovoltaic System using Feed-forward Compensation." Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) 13, no. 1 (2020): 52–63. http://dx.doi.org/10.2174/2352096512666190306141931.

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Background: Solar Photovoltaic (PV) power generating system at the distribution end is emerged as the best solutions to meet the peak power demand during the day time. However, the highly intermittent nature of solar PV system demands a robust control, which is capable of serving a constant load demand even during solar intermittency. Objective: This paper presents a three-phase single-stage grid interfaced solar PV system, which includes PV array, perturb and observe based Maximum Power Point Tracking (MPPT) and Synchronous Reference Frame (SRF) based inverter control. Method: The proposed th

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Chebabhi, Ali, Mohammed-Karim Fellah, Mohamed-Fouad Benkhoris, and Abdelhalim Kessal. "Sliding mode controller for four leg shunt active power filter to eliminating zero sequence current, compensating harmonics and reactive power with fixed switching frequency." Serbian Journal of Electrical Engineering 12, no. 2 (2015): 205–18. http://dx.doi.org/10.2298/sjee1502205c.

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In this paper, the four leg inverter controlled by the three dimensional space vector modulation (3D SVM) is used as the shunt active power filter (SAPF) for compensating the three phase four wire electrical network, by using the four leg inverter with 3D SVM advantages to eliminated zero sequence current, fixed switching frequency of inverter switches, and reduced switching losses. This four leg inverter is employed as shunt active power filter to minimizing harmonic currents, reducing magnitude of neutral wire current, eliminating zero sequence current caused by nonlinear single phase loads

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Siddiqui, Muhammad Salman, Muhammad Hamza Khalid, Abdul Waheed Badar, Muhammed Saeed, and Taimoor Asim. "Parametric Analysis Using CFD to Study the Impact of Geometric and Numerical Modeling on the Performance of a Small Scale Horizontal Axis Wind Turbine." Energies 15, no. 2 (2022): 505. http://dx.doi.org/10.3390/en15020505.

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The reliance on Computational Fluid Dynamics (CFD) simulations has drastically increased over time to evaluate the aerodynamic performance of small-scale wind turbines. With the rapid variability in customer demand, industrial requirements, economic constraints, and time limitations associated with the design and development of small-scale wind turbines, the trade-off between computational resources and the simulation’s numerical accuracy may vary significantly. In the context of wind turbine design and analysis, high fidelity simulation under full geometric and numerical complexity is more ac

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14

Ibarra, Luis, Pedro Ponce, Raja Ayyanar, and Arturo Molina. "A Non-Adaptive Single-Phase PLL Based on Discrete Half-Band Filtering to Suppress Severe Frequency Disturbances." Energies 13, no. 7 (2020): 1730. http://dx.doi.org/10.3390/en13071730.

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The interconnection of new generating and storing devices to the power grid imposes the necessity of synchronizing, so the power flow can be manipulated and distributed. In the presence of an increasingly perturbed electric grid, many proposals of novel and modified synchronization techniques attained enough robustness to deal with known perturbations. However, such proposals exhibit drawbacks on their own, leaving open enhancement opportunities, mostly over their discrete implementation—e.g., sampling issues and not-considered inter/harmonics—and their inherent complexity—e.g., the need for f

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15

Chew, Siew Ting, Yap Hoon, and Hafisoh Ahmad. "Reference Current Generation for Active Power Filtering in Single-Phase Power System." Journal of Physics: Conference Series 2120, no. 1 (2021): 012024. http://dx.doi.org/10.1088/1742-6596/2120/1/012024.

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Abstract The study presents a new proposed reference current generation algorithm based on the synchronous reference frame (SRF) conventional algorithm in single-phase power system for an active power filtering. Shunt active power filter (SAPF) is often used as it can mitigate harmonic currents in the AC networks due to its superiority in dynamic-state conditions. The reference current generation algorithm is the most important control algorithms to control SAPF as it has the simplest implementation features. A proposed STF-based fundamental component identifier (STF-FCI) algorithm is implemen

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ELOTTRI, Ahmed, Lakhdar MZOUZ, Abdellah KOUZOU, Ali TETA, Noureddine NEKBIL, and Fatima BOUTOUTA. "Enhancing Grid Performance of Single-Stage PV Systems Using Modified SRF Theory and SAPF with Quasi-Z-Source Inverter." Electrotehnica, Electronica, Automatica 72, no. 3 (2024): 3–16. http://dx.doi.org/10.46904/eea.23.72.3.1108001.

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This paper presents an innovative solution for the enhancement of the single-stage photovoltaic systems grid-tied topology. The proposed approach involves the integration of an Active Power Filter (APF) with a Quasi-Z-Source Inverter (qZSI) that are controlled by a modified Synchronous Reference Frame (SRF) approach. Indeed, the conventional grid-tied PV systems often face challenges such as grid instability, harmonic distortion, and power quality issues. These issues can lead to inefficient energy transfer and potential damage to grid equipment. In response to these challenges, the proposed s

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17

Raut, Vaibhav S. "Reactive Power Management in Solar PV System using Matlab." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 2079–85. http://dx.doi.org/10.22214/ijraset.2021.35182.

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Photovoltaic (PV) systems propose attractive alternative source of generation because these can be placed near to the load centers when compared with other renewable source of generation. It is therefore rooftop PV is the center of attraction for majority PV systems. The rooftop PV system in general is grid connected and supports the off-grid load with battery backup. The designed system must ensure total evacuation of generated power and with high efficiency of conversion, and utilizes the resource adequately to maximize the utilization of energy. This paper proposes single phase synchronous

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18

Sureshbabu, Sabisha, and Aseem K. "An Efficient Control Scheme Based on PLL Integrated PI Controller for Grid-connected Solar Photovoltaic Systems." Trends in Sciences 19, no. 16 (2022): 5699. http://dx.doi.org/10.48048/tis.2022.5699.

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The market for solar energy is growing these days, thanks to recent developments in Photovoltaic (PV) systems. The integration of solar energy to the grid is required for its optimum utilization. A novel control of a single stage 3 phase grid connected solar inverter is presented in this paper. A PV array, Voltage Source Inverter (VSI) for converting dc to ac, and a filter that connects it to the grid are the major components of the proposed system. The inverter output is regulated with respect to the grid using Synchronous Reference Frame (SRF) control. A 3-phase Phase Locked Loop (PLL) is us

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Madzlan, Noor Aqilah, Noor Syafawati Ahmad, Ahmad Afif Nazib, Jenn Hwai Leong, and Yaow-Ming Chen. "Analysis Study of Fast Dynamic Response for Three-Phase Voltage Source Inverter." Journal of Advanced Research Design 122, no. 1 (2024): 208–18. https://doi.org/10.37934/ard.122.1.208218.

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The power inverter is a crucial device employed within power grids to convert direct current (DC) into alternating current (AC). In the context of high-power grid-connected photovoltaic (PV) power generation systems, three-phase inverters have demonstrated superiority over their single-phase counterparts. Specifically, a three-phase voltage source inverter (VSI) is employed for this application. The VSI operates with a consistent input voltage while ensuring that the output voltage remains unaffected by changes in the load. However, the conventional three-phase VSI has a notable drawback. Cont

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Grover, Ronald O., Xiaofeng Yang, Scott Parrish, et al. "CFD simulations of electric motor end ring cooling for improved thermal management." Science and Technology for Energy Transition 77 (2022): 17. http://dx.doi.org/10.2516/stet/2022015.

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Proper thermal management of an electric motor for vehicle applications extends its operating range. One cooling approach is to impinge Automatic Transmission Fluid (ATF) onto the rotor end ring. Increased ATF coverage correlates to enhanced heat transfer. Computational Fluid Dynamics (CFD) analytical tools provide a mechanism to assess motor thermal management prior to hardware fabrication. The complexity of the fluid flow (e.g., jet atomization, interface tracking, wall impingement) and heat transfer makes these simulations challenging. Computational costs are high when solving these flows o

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Izah, Rofiatul, Subiyanto Subiyanto, and Dhidik Prastiyanto. "Improvement of DSOGI PLL Synchronization Algorithm with Filter on Three-Phase Grid-connected Photovoltaic System." Jurnal Elektronika dan Telekomunikasi 18, no. 1 (2018): 35. http://dx.doi.org/10.14203/jet.v18.35-45.

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Synchronous Reference Frame Phase Locked Loop (SRF PLL) has been widely used for synchronization three-phase grid-connected photovoltaic (PV) system. On the grid fault, SRF PLL distorted by negative sequence component and grid harmonic that caused an error in estimating parameter because of ripple and oscillation. This work combined SRF PLL with Dual Second Order Generalized Integrator (DSOGI) and filter to minimize ripple and minimize oscillation in the phase estimation and frequency estimation. DSOGI was used for filtering and obtaining the 90o shifted versions from the vαβ signals. These si

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Che, Yanbo, Zhaojing Yin, Shuyan Yu, and Qiang Sun. "Random Harmonic Detection and Compensation Based on Synchronous Reference Frame." Journal of Electrical and Computer Engineering 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/7239267.

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Algorithms for harmonic detection and compensation are important guarantees for an active power filter (APF) to achieve the harmonic control function and directly determine the overall performance. Existing algorithms usually need a large amount of computation, and the compensation effect of specified order harmonic is also limited. DC side capacitor voltage at sudden change of load is affected by the algorithm as well. This paper proposes a new algorithm for harmonic detection and compensation based on synchronous reference frame (SRF), in which a band-pass filter with center frequency of 6kt

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23

Reddy, S. R., P. V. Prasad, and G. N. Srinivas. "Power Quality Enhancement Using Particle Swarm Optimization Based Shunt Active Power Filter." International Journal of Mathematical Models and Methods in Applied Sciences 16 (June 25, 2022): 134–39. http://dx.doi.org/10.46300/9101.2022.16.22.

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The shunt active power filter is one compelling arrangement is utilized for reducing the source current harmonics distortion in nonlinear load distribution system. The synchronous reference frame control algorithm utilized to creating current controlled reference signals. The acquired reference control signals are compared with hysteresis controller for better switching of shunt active power filters. Generally SRF with PI controlled shunt active power filter are used to compensation of harmonic. But, they won't give better results to bigger variety loads. In these papers a particle swarm optim

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Chmielewski, Tomasz. "CONTROL AND GRID SYNCHRONIZATION OF TWO LEVEL VOLTAGE SOURCE INVERTER UNDER TEMPORARY VOLTAGE UNBALANCE." Informatics Control Measurement in Economy and Environment Protection 6, no. 4 (2016): 26–31. http://dx.doi.org/10.5604/01.3001.0009.5185.

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This paper presents the operation of grid tied, two level voltage source inverter (VSI) during network voltage unbalance. The control system was implemented in synchronous rotating reference frame dq0 (SRF). Two types of control structures were investigated herein. First utilizes the Double Decoupled SRF Phase-locked loop (DDSRF-PLL) synchronisation with positive and negative sequence currents control. Second one is simplified system that does not provide symmetrical components decomposition and decoupling for synchronisation. Simulation results exhibited a superior performance of the DDSRF-PL

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Abdurrahman, Muhammad Hanif, Iwan Setiawan, and Susatyo Handoko. "DESAIN DAN IMPLEMENTASI SYNCHRONOUS REFERENCE FRAME-PHASE LOCKED LOOP (SRF-PLL) UNTUK TEGANGAN SATU FASE MENGGUNAKAN DSPIC30F4011." TRANSIENT 7, no. 1 (2018): 145. http://dx.doi.org/10.14710/transient.7.1.145-151.

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Fase, magnitude, dan frekuensi dari tegangan listrik merupakan informasi penting dalam pengoprasian sistem jaringan. Berdasarkan kebutuhan penerapan koneksi pembangkit dengan grid side converter (GSC), GSC harus dapat dioperasikan meski pun jaringan mengalami interferensi. Untuk mencapai tujuan tersebut, dibutuhkan metode yang dapat mendeteksi gangguan jaringan secara cepat, yaitu dengan menggunakan metode Phase Locked Loop (PLL) yang dapat menyediakan informasi tegangan jaringan. Dibandingkan dengan algoritma PLL yang lainnya, Synchronous Reference Frame-Phase Locked Loop (SRF-PLL) bisa dikat

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Etemesi, Ambuli B. R., Tamer F. Megahed, Haruichi Kanaya, and Diaa-Eldin A. Mansour. "Design of a bidirectional EV charger using unit template-based current-controlled synchronous reference frame hysteresis." Journal of Electrical Engineering 75, no. 1 (2024): 29–40. http://dx.doi.org/10.2478/jee-2024-0005.

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Abstract Existing distribution networks were not designed with large-scale electric vehicle (EV) charging infrastructure in mind. Integrating EV charging stations with the distribution grid might lead to power quality (PQ) issues at the point of common coupling (PCC). This work proposes a two-mode, unit template-based synchronous reference frame hysteresis current-controlled (SRF-HCC) three-phase Level 2 EV charger. Mode one focuses on charging the EV battery from the grid (G2V) and utilizes current and voltage control techniques to enhance battery life and performance. Whereas mode two enable

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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). T

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Tran, Tho Quang, Anh Viet Truong, Hoan Van Trao, and Phuong Minh Le. "Compensation of offset for SRF-PLL in grid-connected inverters." Science and Technology Development Journal 18, no. 3 (2015): 5–15. http://dx.doi.org/10.32508/stdj.v18i3.867.

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The grid-connected inverters that use synchronous reference frame based phaselocked loop SRF-PLL are applied very popular. The function of SRF-PLLs is fast and accurate estimation of frequency, phase angle, and magnitude of grid voltage. The power quality of the current injected into the grid depends on these estimated parameters. The measurements or processes of data conversion can typically introduce the dc offset in the measured grid voltage. The dc offset is one of the reasons for causing errors for the estimated parameters of the grid voltage and causes injected current with harmonic dist

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Kampitsis, Georgios E., Anastasis P. Tsoumanis, Konstantinos C. Gallos, Stavros A. Papathanassiou, and Stefanos N. Manias. "Experimental Investigation of the Response of Different PLL Algorithms to Grid Disturbances." Materials Science Forum 856 (May 2016): 291–96. http://dx.doi.org/10.4028/www.scientific.net/msf.856.291.

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In this paper, the performance of three different phase locked loop (PLL) algorithms is experimentally evaluated in a grid connected photovoltaic inverter. Robust PLL is a key requirement for ensuring system compatibility with existing grid codes. The double second order generalized integrator (DSOGI) and the decoupled double synchronous reference frame (DDSRF) PLL are compared against the conventional synchronous reference frame (SRF) PLL under grid disturbances. All synchronization algorithms are initially simulated in Matlab and subsequently transformed in discrete time for implementation i

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Zsigmond, Andor-Attila, and András Kelemen. "Implementation of Grid Synchronization Methods on a Real Time Development System." Acta Universitatis Sapientiae, Electrical and Mechanical Engineering 13, no. 1 (2021): 52–67. http://dx.doi.org/10.2478/auseme-2021-0005.

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Abstract The paper presents a study regarding the implementation of two representative grid synchronization methods, intended to be used in the control structure of a three phase switch mode voltage rectifier. The methods considered are the Synchronous Reference Frame Phase Locked Loop (SRF PLL) and the Double Synchronous Frame Phase Locked Loop (DSRF PLL), respectively. These synchronization methods have been compared on a real time development system type dSpace 1104 from the point of view of their performance in case of an unbalanced mains voltage system. Finally, the influence of the chose

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Schreiber, C., D. Elbaz, M. Pannella, L. Ciesla, T. Wang, and M. Franco. "Dust temperature and mid-to-total infrared color distributions for star-forming galaxies at 0 < z < 4." Astronomy & Astrophysics 609 (December 22, 2017): A30. http://dx.doi.org/10.1051/0004-6361/201731506.

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We present a new, publicly available library of dust spectral energy distributions (SEDs). These SEDs are characterized by only three parameters: the dust mass (Mdust), the dust temperature (Tdust), and the mid-to-total infrared color (IR8 ≡ LIR/L8). The latter measures the relative contribution of polycyclic aromatic hydrocarbon (PAH) molecules to the total infrared luminosity. We used this library to model star-forming galaxies at 0.5 < z < 4 in the deep CANDELS fields, using both individual detections and stacks of Herschel and ALMA imaging, and extending this sample to z = 0 using th

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Elhaj, Nabil, Moulay Brahim Sedra, Tarik Jarou, and Hind Djeghloud. "An Improved Double Fuzzy PI Controller For Shunt Active Power Filter DC Bus Regulation." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 2 (2015): 337. http://dx.doi.org/10.11591/ijpeds.v6.i2.pp337-347.

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This paper targets to demonstrate the importance of the choice of the algorithm references detection to be applied with a double fuzzy PI corrector (DFPI) for the control and the regulation of a shunt active power filter (SAPF) DC bus voltage. In a previous work, the synchronous reference frame (SRF) algorithm was applied and gave satisfactory results. In the present paper, the SRF is substituted by the positive sequence of the fundamental of the source voltage algorithm (PSF) which offered better results regarding the power quality of the considered main utility feeding a variable DC RL load

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Ding, Yu, Yan Shi, Hongguo Qin, and Xuexin Wang. "Strength Reduction Factor of Steel Frames with Stainless-Steel Braces." Buildings 15, no. 5 (2025): 681. https://doi.org/10.3390/buildings15050681.

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Previous studies on the strength reduction factor (SRF) have primarily focused on structures without braces or with traditional mild steel braces. However, due to the corrosion damage affecting braces, the existing research cannot guide the application of damage control concepts in corrosive environments. In contrast, stainless-steel braces provide a new direction for applying damage control due to their excellent corrosion resistance. This paper investigates the SRF of steel frames with stainless-steel braces to fill this gap. An equivalent single-degree-of-freedom (SDOF) dual system was esta

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Nagi Reddy, B., and V. Naveen. "Enhancement of grid-tied wind system performance under different loading scenarios." E3S Web of Conferences 547 (2024): 01001. http://dx.doi.org/10.1051/e3sconf/202454701001.

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In this paper, a grid-tied wind system with three-phase and four wire is planned to operate under a variety of loading circumstances. It is proposed that a control technique be utilized in order to provide a reference current signal for the purpose of managing the operation of a three-phase four-wire parallel connected active power filter. When it comes to the generation of reference current, the synchronous reference frame (SRF) method based on time-domain has been widely acknowledged to come with the advantage of providing control simplicity. The parallel active power filter, also known as S

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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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<p><em>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), </em><em>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 b

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Kalal, Vijay Kumar, and Shankarlingappa Channappa Byalihal. "Power quality stabilization system for grid connected large-scale solar power system." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 1 (2024): 518. http://dx.doi.org/10.11591/ijpeds.v15.i1.pp518-529.

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This paper presents solution to power quality issues when integrating a 1.5 MW photovoltaic array (PVA) with a unified power quality conditioner (UPQC) into the power grid. A modified unit vector template control scheme is used to generate a reference load voltage signal, and a synchronous reference frame (SRF) is created using a low-pass filter to control UPQC. Furthermore, the PVA is interfaced with the grid through a common DC link of shunt and series converters. The series converter mitigates power quality problems allied with the grid side, such as 3rd, 5th, and 7th harmonics, voltage sag

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Bimarta, Rizka, Thuy Vi Tran, and Kyeong-Hwa Kim. "Frequency-Adaptive Current Controller Design Based on LQR State Feedback Control for a Grid-Connected Inverter under Distorted Grid." Energies 11, no. 10 (2018): 2674. http://dx.doi.org/10.3390/en11102674.

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This paper proposes a frequency-adaptive current control design for a grid-connected inverter with an inductive–capacitive–inductive (LCL) filter to overcome the issues relating to both the harmonic distortion and frequency variation in the grid voltage. The current control scheme consists of full-state feedback control to stabilize the system and integral control terms to track the reference in the presence of disturbance and uncertainty. In addition, the current controller is augmented with resonant control terms to mitigate the harmonic component. The control scheme is implemented in the sy

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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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Chenchireddy, Kalagotla, and Varghese Jegathesan. "Cascaded H-bridge multilevel inverter-based DSTATCOM with an artificial neural fuzzy inference systembased controller." Indonesian Journal of Electrical Engineering and Computer Science 32, no. 1 (2023): 43. http://dx.doi.org/10.11591/ijeecs.v32.i1.pp43-51.

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<span>In this paper, <span>a voltage source inverter is utilized as a distributed static compensator (DSTATCOM). The DSTATCOM is used for the elimination of harmonics caused by the nonlinear load. The reference currents of DSTATCOM were estimated with a synchronous reference frame (SRF). Conventionally, the SRF uses voltage, load current and filter current to compute the reference current to track desired source current for DSTATCOM. The sliding mode controller and feedback linearization are used to design the current controller. The feedback linearization technique and sliding mod

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Kalagotla, Chenchireddy, and Jegathesan Varghese. "Cascaded H-bridge multilevel inverter-based DSTATCOM with an artificial neural fuzzy inference systembased controller." Cascaded H-bridge multilevel inverter-based DSTATCOM with an artificial neural fuzzy inference systembased controller 32, no. 1 (2023): 43–51. https://doi.org/10.11591/ijeecs.v32.i1.pp43-51.

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In this paper, a voltage source inverter is utilized as a distributed static compensator (DSTATCOM). The DSTATCOM is used for the elimination of harmonics caused by the nonlinear load. The reference currents of DSTATCOM were estimated with a synchronous reference frame (SRF). Conventionally, the SRF uses voltage, load current and filter current to compute the reference current to track desired source current for DSTATCOM. The sliding mode controller and feedback linearization are used to design the current controller. The feedback linearization technique and sliding mode control are used to ca

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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

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Mahar, Hina, Hafiz Mudasir Munir, Jahangir Badar Soomro, et al. "Implementation of ANN Controller Based UPQC Integrated with Microgrid." Mathematics 10, no. 12 (2022): 1989. http://dx.doi.org/10.3390/math10121989.

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This study discusses how to increase power quality by integrating a unified power quality conditioner (UPQC) with a grid-connected microgrid for clean and efficient power generation. An Artificial Neural Network (ANN) controller for a voltage source converter-based UPQC is proposed to minimize the system’s cost and complexity by eliminating mathematical operations such as a-b-c to d-q-0 translation and the need for costly controllers such as DSPs and FPGAs. In this study, nonlinear unbalanced loads and harmonic supply voltage are used to assess the performance of PV-battery-UPQC using an ANN-b

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Huang, Chang Xi, Shu Ying Yang, and Liu Wei Chen. "Unbalanced Control Strategy for DFIG Used in Wind Turbines." Advanced Materials Research 805-806 (September 2013): 430–35. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.430.

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Unbalanced input voltages would make doubly fed induction generator (DFIG)-based wind turbine operating performance deteriorate, such as shaft tremble, temperature increasing, and so on, even make it cut out of the power grid. Meanwhile, without proper control the power ripples generated from wind turbines may further aggravate power grid. Considering the unbalanced conditions, DFIG was modeled in dual synchronous reference frame (SRF), namely the positive one and the negative one, based on which the dual PI current controllers were designed. To implement the dual current control, the sensing

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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 voltag

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Pan, Jia Jin, Yan Cheng Liu, Chuan Wang, and Qin Jin Zhang. "Control for Grid Connected Inverter under Unbalanced Grid Voltage Based on PI-QR Controller." Applied Mechanics and Materials 716-717 (December 2014): 1648–53. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.1648.

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Control strategy under unbalanced and distorted grid voltage is one of the most significant tasks for grid-connected inverter (GCI). In order to guarantee that the grid current meets the related IEEE Std.929-2000, a new control scheme was presented. Firstly, the typical model of GCI was presented. Secondly, the GCI control model based on PI-QR controller in synchronous reference frame (SRF) was built. Finally, the system’s simulation was conducted under distorted and unbalanced grid voltage. The results demonstrate the effectiveness of the presented control strategy.

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Smadi, Issam A., Ibrahem E. Atawi, and Ammar A. Ibrahim. "An Improved Delayed Signal Cancelation for Three-Phase Grid Synchronization with DC Offset Immunity." Energies 16, no. 6 (2023): 2873. http://dx.doi.org/10.3390/en16062873.

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The presence of the DC components in the grid voltage adversely affects the performance of the synchronization unit, causing oscillatory and offset errors in the estimated grid information. Several approaches were proposed to address the DC offset problem by incorporating an additional filtering stage to the synchronous reference frame phase-locked loop (SRF-PLL). Removing the DC offset using the modified delayed signal cancelation (MDSC) operator in the inner loop of the SRF-PLL shows a good DC offset elimination with a fast-dynamic response. However, neither a straightforward selection proce

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Farooq, Faheem, Kamran Hafeez, Bayan Mahdi Sabbar, and Mohannad Jabbar Mnati. "Grid Synchronization in a 3-Phase Inverter using Double Integration Method." WSEAS TRANSACTIONS ON POWER SYSTEMS 19 (May 14, 2024): 192–203. http://dx.doi.org/10.37394/232016.2024.19.19.

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Distributed renewable energy sources (DRESs) have additional benefits compared with conventional fossil fuel-based energy sources. These sources are connected to the utility grid using a suitable synchronization method. It requires accurate information on grid voltage magnitude and phase angle. But the presence of harmonics, DC Offset, and voltage unbalances makes the synchronization process more challenging. Conventionally synchronous reference frame (SRF)- PLL is implemented for this purpose, however, it has a problem with 100Hz ripple during distorted grid conditions. A double integration m

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Islavatu, Srikanth, Pradeep Kumar, Amit Kumar та Surender Reddy Salkuti. "Power Quality Analysis by H-Bridge DSTATCOM Control by Icosθ and ESRF SOGI-FLL Methods for Different Industrial Loads". Smart Cities 5, № 4 (2022): 1590–610. http://dx.doi.org/10.3390/smartcities5040081.

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This work develops the analysis of power quality by the H-bridge Static Distribution Compensator (DSTATCOM) as well as its control techniques in different industry-based loading conditions. The function of DSTATCOM is to diminish power quality problems arising due to commercial as well as industrial loads. For reference current extraction, the novel Icosθ and proposed enhanced SRF SOGI-FLL (synchronous reference frame second-order generalized integrator frequency-locked loop) controller have been adopted in the H-bridge DSTATCOM. The Icosθ controller’s performance is dependent on the in-phase

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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. Th

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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

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