scholarly journals Double-loop control structure using proportional resonant and sequence-decoupled resonant controllers in static coordinates for dynamic voltage restorer

2019 ◽  
Vol 5 (3) ◽  
pp. 10-19 ◽  
Author(s):  
Vu Thai Hung ◽  
Hongchun Shu ◽  
Le Ngoc Giang ◽  
Nguyen Duc The
Keyword(s):  
Control Structure ◽  
Double Loop ◽  
Dynamic Voltage Restorer ◽  
Loop Control ◽  
Voltage Restorer ◽  
Dynamic Voltage

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 More stability and robustness with the multi-loop control solution for dynamic voltage restorer (DVR)

2009 ◽  
Vol 6 (1) ◽  
pp. 75-88 ◽  
Author(s):  
Othmane Abdelkhalek ◽  
Abderrahmane Kechich ◽  
Tarek Benslimane ◽  
Chellali Benachaiba ◽  
Mohammed Haidas
Keyword(s):  
Control Solution ◽  
Dynamic Voltage Restorer ◽  
Loop Control ◽  
Voltage Restorer ◽  
Dynamic Voltage

scholarly journals Voltage Sag Compensation Using Dynamic Voltage Restorer

2019 ◽  
Vol 8 (6) ◽  
pp. 3571-3574
Keyword(s):  
Power Quality ◽  
Closed Loop ◽  
Functional Performance ◽  
Voltage Sag ◽  
Controlled System ◽  
Dynamic Voltage Restorer ◽  
Loop Control ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Bus System

Power quality plays a very important vital role in the modern utility grid where sensitive loads are employed. Equipment damage, temporary shutdowns, product quality degradation and Voltage Sag are the major problem associated with power quality. Dynamic Voltage Restorer (DVR) is a powerful device which is used to improve voltage mitigation of weak buses associated in a multi-bus system. This paper incorporates the functional performance of DVR during voltage sag in the power system. Penetrating a voltage of required magnitude and frequency to restore the voltage across the load within the desired amplitude is the main objective of DVR. The proposed work based on modeling and simulation of DVR, in a closed-loop control of an eight bus system. Voltage compensation is done effectively using DVR in the Closed loop FLC controlled system and its analyzed with PID Controlled system. The simulation result shows Closed loop FLC system using DVR is observed to be faster than PID controlled systems.

Mitigation of Unbalanced Voltage Sag/Swells Using Dynamic Voltage Restorer Based on Super Capacitor

2015 ◽  
Vol 2 (4) ◽  
pp. 1-6
Author(s):  
K. Venkateswarlu ◽  
◽  
B. Ashwin Kumar ◽  
N. Srinivas ◽  
V. Mallikarjuna Rao ◽  
...  
Keyword(s):  
Voltage Sag ◽  
Super Capacitor ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Unbalanced Voltage ◽  
Dynamic Voltage
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