Modeling and simulation of dynamic voltage restorer for voltage sags mitigation in medium voltage networks with secondary distribution configuration

2014 ◽  
Author(s):  
Gheorghe-Ioan Nicolaescu ◽  
Horia Andrei ◽  
Stefan Radulescu
Keyword(s):  
Modeling And Simulation ◽  
Voltage Sags ◽  
Dynamic Voltage Restorer ◽  
Medium Voltage ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Secondary Distribution

The Design of Regional Compensation DVR in Medium Voltage System

2014 ◽  
Vol 654 ◽  
pp. 146-155
Author(s):  
Zheng Guo Zhu ◽  
Hua Ying Zhang ◽  
Sen Jing Yao ◽  
Jun Wei Cao ◽  
Jin Tao Yang
Keyword(s):  
Calculation Method ◽  
Distribution System ◽  
Reference Voltage ◽  
Voltage Sags ◽  
Dynamic Voltage Restorer ◽  
Medium Voltage ◽  
System A ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Simulation Results

The design of a Dynamic Voltage Restorer that is suitable for compensating regional voltage sags in 10kV distribution system is introduced in this paper. The design of the main circuit based on cascaded H-bridge, the device for energize DVR and the transformer-less coupled circuit are presented. For the voltage sags in neutral point non-grounded system, a reference voltage calculation method with the aim is to restore the line voltages on the load side is put forward. The simulation model of a substation including the designed DVR device has been built in PSCAD, and the compensation results under different fault types are simulated and analyzed, the influence of the energize device on the distribution system is studied. The simulation results verify the correctness and effectiveness of the design of DVR hardware and the reference voltage calculation method.

Mitigation of Voltage Sags and Swells by Dynamic Voltage Restorer

2013 ◽  
Vol 768 ◽  
pp. 338-343 ◽  
Author(s):  
Shakti Prasad Mishra ◽  
Lisby Varghese ◽  
J. Preetha Roselyn ◽  
D. Devaraj
Keyword(s):  
Computer Simulations ◽  
Cost Effective ◽  
Test System ◽  
Modelling And Simulation ◽  
Control Technique ◽  
Voltage Sags ◽  
Dynamic Voltage Restorer ◽  
Suitable Test ◽  
Voltage Restorer ◽  
Dynamic Voltage

This paper presents the modelling and simulation of Dynamic Voltage Restorer (DVR) for mitigation of voltage sags and swells which are the major problems and issues on non linear loads.The Dynamic Voltage Restore (DVR) has become popular as a cost effective solutions for the protection of sensitive loads from voltage sags and swells.. The control of compensation voltages in DVR based on a-b-c to d-q-0 algorithm is discussed. The proposed control technique is cost effective and simple to design. Computer simulations are carried out in a suitable test system to investigate the effectiveness of control technique by using MATLAB/SIMULINK software.

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