A Control Method of 3-Phase Transformer-Less Dynamic Voltage Restorer

2008 ◽  
Vol 128 (9) ◽  
pp. 1065-1074 ◽  
Author(s):  
Nobuhiko Hatano
Keyword(s):  
Control Method ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage

scholarly journals PV integrated single-phase dynamic voltage restorer for sag voltage, voltage fluctuations and harmonics compensation

2020 ◽  
Vol 11 (1) ◽  
pp. 547
Author(s):  
Toufik Toumi ◽  
Ahmed Allali ◽  
Othmane Abdelkhalek ◽  
Abdallah Ben Abdelkader ◽  
Abdelmalek Meftouhi ◽  
...  
Keyword(s):  
Single Phase ◽  
Control Method ◽  
Sliding Mode ◽  
Power Source ◽  
Voltage Source ◽  
Dynamic Voltage Restorer ◽  
Phase Dynamic ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Bus Voltage

<span>This document proposes a photovoltaic (PV) based single-phase dynamic voltage restoration (DVR) device, it eliminates both sag and swell voltage and compensates for power. The proposed system requires a power source to compensate for the sag/swell voltage. This system has found a simple topology for the DVR that uses PV with two DC-DC boosts converters as the DC power source for the dynamic voltage conservator. The DC/DC boost converter powered by the PV generator is used to increase the voltage to meet the DC bus voltage requirements of the single-branch voltage source inverter (VSI). This system uses renewable energy; saves energy accordingly and supplies power to critical/sensitive loads. The control method used in this work is a Sliding Mode Control (SMC) method and relies on a phase locked loop (PLL) used to control the active filter. The effectiveness of the suggested method is confirmed by the MATLAB/Simulink® simulation results and some prototype experiments. These results show the capacity of the proposed DC link control.</span>

scholarly journals Compensation of Voltage Sags and Swells Using Dynamic Voltage Restorer Based on Bi-Directional H-Bridge AC/AC Converter

Processes ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1541
Author(s):  
Yu-Kai Chen ◽  
Xian-Zhi Qiu ◽  
Yung-Chuna Wu ◽  
Chau-Chung Song
Keyword(s):  
Single Phase ◽  
Control Method ◽  
Gain Control ◽  
Voltage Sags ◽  
Dynamic Voltage Restorer ◽  
Line Voltage ◽  
Loop Control ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Voltage Swells

In this paper, the compensation of voltage sags and swells using a dynamic voltage restorer (DVR) based on a bi-directional AC/AC converter is presented for stabilizing single-phase AC line voltage. The H-bridge AC/AC converter with bi-directional switches and without bulk capacitor is adopted as the power topology of the proposed system. The proposed novel topology of DVR is adopted to compensate both voltage sag and swell conditions. Additionally, the power factor is closed to unity because a bulk capacitor is not required. The inner and outer loop control is proposed to improve the response with gain scaling; gain control is adopted to reduce the overshoot. Finally, a 2 kVA prototype has been implemented to verify the performance and accuracy of the control method for the DVR system. The peak efficiency of the system is up to 94%, and it can compensate 50% voltage swells and 25% voltage sags.

scholarly journals Control DC link of single-phase dynamic voltage restorer

2020 ◽  
Vol 9 (3) ◽  
pp. 297
Author(s):  
Toumi Toufik ◽  
Allali Ahmed ◽  
Abdelkhalek Othmane ◽  
Soumeur Mohammed Amine ◽  
Nasri Abdelfatah
Keyword(s):  
Power Flow ◽  
Single Phase ◽  
Control Method ◽  
Distribution Grid ◽  
Dynamic Voltage Restorer ◽  
Long Run ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Source Voltage ◽  
Bidirectional Power Flow

This paper is aimed to illustrate and expose the performance of single-phase voltage dynamic voltage restorer (DVR) control connected to the electrical distribution grid. This performance is easily expressed by compensating for the sags and the swells voltages, and regulating the voltage across the load by injecting a voltage component in series with the source voltage increased or decreased with respect to the source voltage the load-side waveforms are purely sinusoidal. The integration of serial and chopper converters makes  the DVR capable of bidirectional power flow. The key to this topology is its ability to compensate for sagging and swelling of the voltage in the long run. The modeling of the DVR and the design of its controller is included in this document. Effectiveness of control systems and start-up sequence of DVR operation is verified by detailed simulation studies. The control method used in this work is based on the use of a booster chopper and two cascade loops  to generate the PWM command to control the chopper. The effectiveness  of the suggested method is confirmed by the MATLAB/SIMULINK® simulation results and some prototype experiments. These results show  the capacity of the proposed DC link control.

The DC link energy control method in dynamic voltage restorer system

2003 ◽  
Vol 25 (7) ◽  
pp. 525-531 ◽  
Author(s):  
Il-Yop Chung ◽  
Dong-Jun Won ◽  
Sang-Young Park ◽  
Seung-Il Moon ◽  
Jong-Keun Park
Keyword(s):  
Control Method ◽  
Energy Control ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage

SOFC-Supported Hybrid PSOGSA-Optimized Dynamic Voltage Restorer for Power Quality Enhancement

2021 ◽  
pp. 2250006
Author(s):  
P. Sathish Babu ◽  
C. K. Sundarabalan ◽  
C. Balasundar
Keyword(s):  
Power Quality ◽  
Control Method ◽  
Supply Voltage ◽  
Test System ◽  
Pi Controller ◽  
Optimal Method ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Tuning Methods

A novel optimal method of a Dynamic Voltage Restorer (DVR) supported by solid oxide fuel cell (SOFC) and its simplified topological structure are proposed. DVR is a power-electronic converter-based device, and the objective of the DVR control system is to minimize supply voltage variations at the load terminals. This is attained by generating a compensating voltage at the series injection transformer. Conventional controllers are mathematical model-based; also, the particular system varies widely, and nonlinear factors make the PI controller tuning more challenging to some extent. As a result, an intelligent PI optimization control method is essential. This paper proposes Hybrid PSOGSA to search for optimal values of two PI control parameters for the [Formula: see text]–[Formula: see text]-axis components by considering a novel bi-objective function. The performance of the test system is analyzed for five test scenarios using the proposed PI controller with SPSO-optimized and Ziegler–Nichols tuning methods. DVR system provides an excellent control performance in the transient and steady states for compensating the sensitive load voltages with almost zero steady-state errors. Simulation results show that the proposed approach can provide improved performance than PSO-optimized and classical PI controllers for the power quality indices measured.

scholarly journals Development of Multilevel Cascaded H-bridge Inverter Based Dynamic Voltage Restorer (DVR)

2019 ◽  
Vol 8 (12) ◽  
pp. 146-149
Keyword(s):  
Control Method ◽  
Estimation Method ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Three Phase ◽  
Control Scheme ◽  
Energy Compensation ◽  
Dynamic Voltage ◽  
And Control ◽  
Custom Power

The objective of this study is to present the development of a dynamic voltage restorer (DVR) which employs a cascaded H-bridge multilevel inverter. DVR is a power electronic converter based on custom power device used to compensate for voltage variations. DVR does not need active energy storage systems like batteries as the zero energy compensation method is used. The control system may lead to challenges as compared with other DVR systems. To overcome this challenge a control method is used. In addition to minimize the delay of DVR and to mitigate the voltage sags, a three phase estimation method is used. The estimation method and control scheme is performed by using MATLAB/SIMULINK.

scholarly journals MSRF Control Based Interline Dynamic Voltage Restoration in Distribution Line

2020 ◽  
Vol 8 (5) ◽  
pp. 2953-2957
Keyword(s):  
Control Method ◽  
Settling Time ◽  
Voltage Sag ◽  
Dynamic Voltage Restorer ◽  
Synchronous Reference Frame ◽  
Voltage Variation ◽  
Voltage Restorer ◽  
Three Phase ◽  
Dynamic Voltage ◽  
Distribution Station

This paper deals with the implementation of interline dynamic voltage restorer (IDVR) system using three-phase inverter integrated with PLL based MSRF controller for regulating the DC link voltage, and reducing the voltage sag. Voltage variation that frequently occurs either in the form of voltage sag or swells and it can cause major damage to the environment and distribution station. In this paper, interline dynamic voltage restorer has proposed which consist of more than one DVR's are commonly connected with the DC link capacitor of the system. Suitable control methods are developed for reduce the voltage sag in the line. Modified synchronous reference frame control has designed and implemented for both controls, and compensation of voltage sag. Conventional control method has some constraints such as high settling time of dc link voltage, and increase in harmonics that could be overcome by a new approach of MSRF based PLL has presented in this paper, which helps to compensate the voltage sag occurs in the system. Furthermore design and analysis of MSRF based IDVR is proposed to improve the efficiency, reducing the settling time of DC link voltage, reducing the harmonics distortion, and minimize the power quality issues by using MATLAB/SIMULINK.

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