scholarly journals Protection of Sensitive Loads in Distribution Systems Using a BSFCL-DVR System

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1615
Author(s):  
Mehdi Firouzi ◽  
Saleh Mobayen ◽  
Hossein Shahbabaei Kartijkolaie ◽  
Mojtaba Nasiri ◽  
Chih-Chiang Chen
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Fault Current ◽  
Dynamic Voltage Restorer ◽  
Voltage Quality ◽  
Voltage Restorer ◽  
Point Of Common Coupling ◽  
Dynamic Voltage ◽  
Bridge Type ◽  
In The Beginning

In this paper, an incorporated bridge-type superconducting fault current limiter (BSFCL) and Dynamic Voltage Restorer (DVR) is presented to improve the voltage quality and limiting fault current problems in distribution systems. In order to achieve these capabilities, the BSFCL and DVR are integrated through a common DC link as a BSFCL-DVR system. The FCL and DVR ports of the BSFCL-DVR system are located in the beginning and end of the sensitive loads’ feeder integrated to the point of common coupling (PCC) in the distribution system. At first, the principle operation of the BSFCL-DVR is discussed. Then, a control system for the BSFCL-DVR system is designed to enhance the voltage quality and limit the fault current. Eventually, the efficiency of the BSFCL-DVR system is verified through the PSCAD/EMTDC simulation.

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 A new multifunctional DVR for compensation of voltage sag

2018 ◽  
Vol 7 (2.19) ◽  
pp. 45
Author(s):  
N. Srinivasa Rao ◽  
A. Selwin Mich Priyadharson
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Distribution Systems ◽  
Low Cost ◽  
Electrical Network ◽  
Dynamic Voltage Restorer ◽  
Power Injection ◽  
Point Of Common Coupling ◽  
Dynamic Voltage ◽  
Emergency Scenarios

Today, power quality is considered as a significant application. i) Highly effectual variable speed drive, ii) sophisticated electronic equipment together with iii) power electronic controller, is utilized to enhance power quality (PQ). Voltage sags are the prevalent PQ disturbances on the distribution system. It occurs on account of the faults developed in the electrical network or by the working of a huge induction motor. It is resolved by utilizing the conventional power device termed DVR (Dynamic Voltage Restorer). It is of small size and also low cost. It proffers quick dynamic response to the disturbance. A multifunctional DVR is utilized here to augment the PQ with the aid of P+ Resonant and Posicast controllers to remove the steady-state error (SSE) and enhance the transient response. Simulation outcome displays that the DVR enables to restrain the emergency scenarios of the distribution systems. The prevailing limitation reinstate the PCC (i.e. point of common coupling) (i.e. the bus to which every feeders are linked) voltage and Defend the DVR itself. The DVR performs as virtual impedance with the chief target of shielding the PCC voltage all through the downstream fault without affecting real power injection in the DVR which is the significant innovation discussed here.

Power Quality Assessment and Enhancement in a Grid Connected Renewable Energy System Using Dynamic Voltage Restorer

2014 ◽  
Vol 573 ◽  
pp. 716-721
Author(s):  
S. Rajeshbabu ◽  
B.V. Manikandan
Keyword(s):  
Neural Network ◽  
Renewable Energy ◽  
Power Quality ◽  
Energy System ◽  
Dynamic Voltage Restorer ◽  
Renewable Energy System ◽  
Voltage Restorer ◽  
Point Of Common Coupling ◽  
Dynamic Voltage ◽  
Common Coupling

Renewable energy sources provide the additional/satisfy the power to the consumer through power electronics interfaces and integrated with the grid. In grid integration power quality is one of the important parameter that need to be paying more attention. This proposed work focuses on power quality issues in a grid connected renewable energy system. Power quality issues will arises due to many factors here with the by introducing a fault condition in a grid connected renewable energy system the measurements were made at the point of common coupling and the mitigation is done with the help of a dynamic voltage restorer. The dynamic voltage restorer is a device which offers series compensation activated by neural network based controller. The sag improvement and the total harmonic assessment were made at the point of common coupling. Keywords: Neural network, Point of common coupling, Renewable energy source, Power quality, Dynamic voltage restorer ,electric grid.

scholarly journals Voltage disturbance mitigation in Iraq's low voltage distribution system

2020 ◽  
Vol 17 (1) ◽  
pp. 47
Author(s):  
Jamal Abdul-Kareem Mohammed ◽  
Arkan Ahmed Hussein ◽  
Sahar R. Al-Sakini
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Distribution Network ◽  
Voltage Source ◽  
Power Distribution Network ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage

<p>Power distribution network in Iraq still suffers from significant problems regarding electricity distribution level. The most important problem is the disturbances that are occurring on lines voltages, which in turn, will negatively affect sensitive loads they feed on. Protection of these loads could be achieved efficiently and economically using the dynamic voltage restorer DVR when installed between the voltage source and load to inject required compensation voltage to the network during the disturbances period. The DVR mitigates these disturbances via restoring the load voltage to a pre-fault value within a few milliseconds. To control the DVR work, dq0 transformation concept and PID method with sinusoidal pulse-width modulation SPWM based converter had been used to correct the disturbances and thus enhance the power quality of the distribution network. The DVR performance was tested by MATLAB/Simulink with all kinds of expected voltage disturbances and results investigated the effectiveness of the proposed method.</p>

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