scholarly journals Analysis and Mathematical Model for Restitution of Voltage Using Dynamic Voltage Restorer

2014 ◽  
Vol 2014 ◽  
pp. 1-18
Author(s):  
C. Gopinath ◽  
C. Yaashuwanth ◽  
R. Ramesh ◽  
J. R. Maglin ◽  
T. Ajith Bosco Raj
Keyword(s):  
Fuel Cell ◽  
Distribution Systems ◽  
Fuzzy Controller ◽  
Polymer Electrolyte Membrane ◽  
Voltage Sag ◽  
Super Capacitor ◽  
Dynamic Voltage Restorer ◽  
Electrolyte Membrane ◽  
Voltage Restorer ◽  
Dynamic Voltage

Voltage sag and swell have a major concern in the distribution systems. In order to mitigate the voltage sag and swell, a custom power device called dynamic voltage restorer (DVR) is used. The proposed system is a polymer electrolyte membrane (PEM) fuel cell based DVR. The energy from the fuel cell is stored in the super capacitor to restitute the voltage. In this proposed DVR, Z-source inverter is used instead of traditional inverter because of buck-boost and shoot through capability. The simulation is performed using three controller topologies: PI controller, synchronous reference frame controller and fuzzy controller and the results are verified using Matlab-Simulink environment.

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

scholarly journals Comparative Analysis of PI controller, Fuzzy controller and Interval Type-2 Fuzzy based Performance of Dynamic Voltage Restorer for Compensation of Voltage Sag and Swell

2021 ◽  
Vol 23 (07) ◽  
pp. 550-557
Author(s):  
Bharti Thakur ◽  
◽  
Dr. Archana Rani ◽  
Keyword(s):  
Power Systems ◽  
Fuzzy Controller ◽  
Pi Controller ◽  
Voltage Sag ◽  
Dynamic Voltage Restorer ◽  
Synchronous Reference Frame ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Interval Type

In today’s scenario, the power quality issues like voltage sag and swell are major concerns in power systems. On the distribution, side to overcome this issue a custom power device DVR(Dynamic Voltage Restorer) is proven to be a more effective solution that is lower in cost, smaller in size, and offers a faster dynamic response for the protection of sensitive load. DVR is a series compensating device which operates as a voltage booster. The application of DVR is entitled to be a flawless compensating device for the compensation of voltage sag and swell. This paper presents the modeling and simulation using various controller topologies like PI controller based on synchronous reference frame algorithm, fuzzy controller, and interval type 2 fuzzy controller. The results are then verified using a Matlab-Simulink environment.

A Fuzzy Controller for Compensation of Voltage Sag/Swell Problems Using Reduced Rating Dynamic Voltage Restorer

2015 ◽  
Vol 4 (2) ◽  
pp. 45
Author(s):  
Rajesh Damaraju ◽  
S.V.N.L. Lalitha
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Fuzzy Controller ◽  
Low Cost ◽  
Voltage Sag ◽  
Transformation Technique ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Compensating Devices

<p>Non linear loads are highly effected by variations in voltages. Dynamic voltage restorer is one of the most popular compensating devices due to its low cost and better performance. Usage of Park’s transformation technique effectively reduces the rating of Dynamic voltage restorer. Application of fuzzy logic controller for getting the better result is proposed in this paper. The results are verified in Matlab/Simulink environment.</p>

scholarly journals A Novel Analysis of Improving Displacement Factor Using IVDFC in Distribution Systems

2017 ◽  
Vol 6 (3) ◽  
pp. 193
Author(s):  
M. Padmarasan ◽  
C.T. Manikandan ◽  
N. Karthikeyan ◽  
L. Jayaprakash ◽  
C.S. Ajin Sekhar
Keyword(s):  
Critical Load ◽  
Distribution System ◽  
Distribution Systems ◽  
Reactive Power ◽  
Voltage Sag ◽  
Dynamic Voltage Restorer ◽  
Power Exchange ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Displacement Factor

In this paper discuss the new approach for improving displacement factor using an Interline Dynamic Voltage Restoring and Displacement Factor Controlling Device (IVDFC) in a distribution system. An Interline Dynamic Voltage Restorer (IDVR) is perpetually engaged in distribution systems to mitigate voltage sag/swell problems. An IDVR simply consists of numerous dynamic voltage restorers (DVRs) sharing a common dc link connecting independent feeders to safe electric power to critical loads. The IDVR is operated that it hold the voltage across the critical load bus terminals constant at system nominal frequency irrespective of the changes occurring in source voltages frequency. While one of the DVRs compensates for the local voltage sag in its feeder, the other DVRs reload the common dc-link voltage. For normal voltage levels, the DVRs should be bypassed. Instead of bypassing the DVRs in normal conditions, this paper proposes operating the DVRs, if needed, to improve the displacement factor (DF) of one of the involved feeders. DF improvement can be achieved via active and reactive power exchange (PQ sharing) between different feeders. To successfully apply this concept, several constraints are addressed throughout the paper. The simulation model for this system is developed using MATLAB which is shown that the voltage across the critical load is regulated completely.

scholarly journals Dynamic Voltage Restorer for Sag and Swell Issues in Power System

2018 ◽  
Vol 11 (3) ◽  
pp. 1243
Author(s):  
Lakshmi Lakshmi Kumari ◽  
Uma Vani Uma Vani
Keyword(s):  
Power Quality ◽  
Distribution Systems ◽  
Power Device ◽  
Voltage Sag ◽  
Voltage Sags ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Wide Range ◽  
Dynamic Voltage ◽  
Custom Power

<p>This paper presents the application of dynamic voltage restorers (DVR) on power distribution Systems for mitigation of voltage sags/swells at critical loads. DVR is one of the compensating types of custom power devices. The power quality is affected mainly due to the sensitive loads which results in voltage sag and voltage swells. It is necessary to investigate the suitable methods for mitigation of voltage sags. Sensitivity is the main cause of the above power quality problems and it cannot be eliminated completely as it has many other operating properties. So the next possible solution is to correct the problems caused by the sensitive equipments connected to the faulty loads. The occurrence of sag and swell varies with equipment, environment, process operations, desired control schemes etc. From the wide range of mitigation methods, the selected one has to be observed for the effect on the characteristics. These problems can be mitigated with voltage injection method using custom power device, Dynamic Voltage Restorer (DVR). In this paper we design a Dynamic Voltage Restorer (DVR) which is utilized for power quality improvement. The main power quality problems like voltage sag and swell are studied in this paper. The device used to phase out voltage sags and a swell in the distribution lines is the Dynamic Voltage Restorer (DVR). The Dynamic Voltage Restorer is a special type of power device used for providing consistent and reliable supply power to the load devices. Dynamic Voltage Restorer uses a vector control strategy for mitigating power quality problems by automatically detecting and injecting the voltage components through an injection transformer. Here comes the importance of soft computing techniques like PI controller. The system will be able to correct repeated occurrences of the power quality problems. </p>

scholarly journals A Fuzzy Controller for Compensation of Voltage SAG/SWELL Problems Using Reduced Rating Dynamic Voltage Restorer

2015 ◽  
Vol 15 (3) ◽  
pp. 407
Author(s):  
Rajesh Damaraju ◽  
S.V.N.L. Lalitha
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Fuzzy Controller ◽  
Low Cost ◽  
Voltage Sag ◽  
Transformation Technique ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Compensating Devices

<p>Non linear loads are highly effected by variations in voltages. Dynamic voltage restorer is one of the most popular compensating devices due to its low cost and better performance. Usage of Park’s transformation technique effectively reduces the rating of Dynamic voltage restorer. Application of fuzzy logic controller for getting the better result is proposed in this paper. The results are verified in Matlab/Simulink environment.</p>

Z- Source Inverter Based Dynamic Voltage Restorer for the Mitigation of Voltage Sag/Swell

2016 ◽  
Vol 5 (2) ◽  
pp. 87
Author(s):  
K. Prameela ◽  
D. Vijay Kumar ◽  
B. Trinadha
Keyword(s):  
Input Voltage ◽  
Storage Device ◽  
Voltage Sag ◽  
Super Capacitor ◽  
Nonlinear Load ◽  
Dynamic Voltage Restorer ◽  
Dc Voltage ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Voltage Swell

This paper uses super capacitor as the energy storage device for the DVR to compensate voltage sag, voltage swell and harmonics due to addition of nonlinear load in the distribution line. Based on this topology, DVR consist of super capacitor, z source inverter and injection transformer. Super capacitor produces the necessary dc voltage which is given as the input voltage to the z-source inverter; provide the necessary injecting voltage, which has to be restored. A new topology based on Z-source inverter is presented in order to enhance the voltage restoration property of dynamic voltage restorer. Z-source inverter would ensure a constant DC voltage across the DC-link during the process of voltage compensation. The modeling of Z-source based dynamic voltage restorer is carried out component wise and their performances are analyzed using MATLAB software

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