Study of Dynamic Voltage Restorer Based on Repetitive Control Algorithm

2013 ◽  
Vol 765-767 ◽  
pp. 2525-2528 ◽  
Author(s):  
Tian Yu Liu
Keyword(s):  
Control Strategy ◽  
Control Algorithm ◽  
Repetitive Control ◽  
Electric Power System ◽  
Voltage Sags ◽  
Dynamic Compensation ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Three Phase ◽  
Dynamic Voltage

This paper introduces a dynamic voltage restorer with independent three-phase structure, which is controlled on repetitive control strategy. Computer simulation of the whole repetitive control system is performed by Matlab/Simulink, and the results show that the effect of dynamic compensation can meet the request when voltage sags happened in electric power system.

Power Quality Improvement Using an Enhanced Network-Side-Shunt-Connected Dynamic Voltage Restorer

2015 ◽  
Vol 16 (5) ◽  
pp. 451-472 ◽  
Author(s):  
Alireza Fereidouni ◽  
Mohammad A. S. Masoum ◽  
Moayed Moghbel
Keyword(s):  
Poor Performance ◽  
Boost Converter ◽  
Voltage Sags ◽  
Harmonic Compensation ◽  
Dynamic Voltage Restorer ◽  
Load Voltage ◽  
Voltage Restorer ◽  
Three Phase ◽  
Dynamic Voltage ◽  
Zero Sequence

Abstract Among the four basic dynamic voltage restorer (DVR) topologies, the network-side shunt-connected DVR (NSSC-DVR) has a relatively poor performance and is investigated in this paper. A new configuration is proposed and implemented for NSSC-DVR to enhance its performance in compensating (un)symmetrical deep and long voltage sags and mitigate voltage harmonics. The enhanced NSSC-DVR model includes a three-phase half-bridge semi-controlled network-side-shunt-connected rectifier and a three-phase full-bridge series-connected inverter implemented with a back-to-back configuration through a bidirectional buck-boost converter. The network-side-shunt-connected rectifier is employed to inject/draw the required energy by NSSC-DVR to restore the load voltage to its pre-fault value under sag/swell conditions. The buck-boost converter is responsible for maintaining the DC-link voltage of the series-connected inverter at its designated value in order to improve the NSSC-DVR capability in compensating deep and long voltage sags/swells. The full-bridge series-connected inverter permits to compensate unbalance voltage sags containing zero-sequence component. The harmonic compensation of the load voltage is achieved by extracting harmonics from the distorted network voltage using an artificial neural network (ANN) method called adaptive linear neuron (Adaline) strategy. Detailed simulations are performed by SIMULINK/MATLAB software for six case studies to verify the highly robustness of the proposed NSSC-DVR model under various conditions.

scholarly journals Design and simulation of Dynamic Voltage Restorer (DVR) supported by solar panels

2021 ◽  
pp. 31-36
Author(s):  
Omar Antonio-Lara ◽  
Pedro Martín García-Vite ◽  
Rafael Castillo-Gutiérrez ◽  
Hermenegildo Cisneros-Villegas
Keyword(s):  
Distribution System ◽  
Control Algorithm ◽  
Controller Design ◽  
Voltage Sags ◽  
Solar Panels ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Voltage Compensation ◽  
Dynamic Voltage ◽  
Mathematical Techniques

This work presents the design and simulation of a Dynamic Voltage Restorer (DVR) to mitigate power quality problems such as voltage sags and swells at sensitive loads to these types of disturbances, but with a compensation topology using one the most popular of the renewable energies, currently employed, which is photovoltaic solar energy. The DVR must operate with a control loop, monitoring the voltage at the load side and generating the voltage for compensation during the disturbances. The energy is obtained, from an array of solar panels for the injection of active power. The control algorithm discussed in this article is based on the Clark and Park transformations to generate the required signals for voltage compensation, these mathematical techniques allow fixing the variables and hence simplicity for the controller design. The results of the simulation in MATLAB/Simulink are used to show the performance of the proposed topology with symmetrical voltage sags in the distribution system.

scholarly journals Improved Analysis of DVR Performance for Voltage Sag Mitigation

2018 ◽  
Vol 17 (3) ◽  
pp. 36-40
Author(s):  
Hannah Naqiah Abdul Razak ◽  
Dalila Mat Said ◽  
Nasarudin Ahmad
Keyword(s):  
Power System ◽  
Power Distribution ◽  
Load Condition ◽  
Voltage Sag ◽  
Voltage Sags ◽  
Dynamic Voltage Restorer ◽  
Power Distribution System ◽  
Voltage Restorer ◽  
Three Phase ◽  
Dynamic Voltage

Dynamic Voltage Restorer (DVR) provides the most reliable solution to the voltage quality problem in power distribution system from the effectiveness of DVR performance for voltage sag mitigation. As a custom power device, DVR offers the best solution to three phase power system in order to improve the power quality issue as the magnitude and phase of the voltage is added during the sags occurrence to restore the load condition to compensate the voltage sags. The suitable controller, Proportional-Integral (PI) Controller is used along with the Pulse Width Modulation (PWM)-based control scheme to calculate the exact error and generate the missing voltage to be injected to the three-phase power system through injection transformers. Simulation results of various fault types using MATLAB/SIMULINK are shown in this paper to demonstrate the successful compensation of voltage sags by mitigation technique using Dynamic Voltage Restorer in three-phase power distribution. 

scholarly journals Attenuation of Zero Sequence Voltage Using a Conventional Three-Wire Dynamic Voltage Restorer

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1247
Author(s):  
Rafael Neto ◽  
Yandi Landera ◽  
Francisco Neves ◽  
Helber de Souza ◽  
Marcelo Cavalcanti ◽  
...  
Keyword(s):  
Distribution Systems ◽  
Electric Energy ◽  
Voltage Sags ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Three Phase ◽  
Depth Study ◽  
Dynamic Voltage ◽  
Zero Sequence ◽  
Zero Sequence Voltage

Voltage sags/swells and harmonics are recurring problems in electric energy distribution systems. In order to solve these issues, several dynamic voltage restorer (DVR) topologies, such as the conventional three-wire DVR, have been proposed in the literature. Despite its capability of mitigating voltage disturbances, many researchers have established that conventional three-wire DVR cannot compensate for zero sequence voltage disturbances. In this paper, an in-depth study of the conventional three-phase DVR is presented, which shows that this DVR topology can also be used to attenuate zero sequence voltage components without increasing control complexity. The necessary conditions for this to occur are discussed in details and a brief comparison between the conventional three-wire DVR and other DVR topologies that can compensate for zero sequence voltage disturbances is made. Experimental results are included to validate the theoretical study.

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