scholarly journals Influence of DVR on Adjacent Load and Its Compensation Strategy Design Based on Externality Theory

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3716 ◽  
Author(s):  
Du ◽  
Chen ◽  
Dai ◽  
Javed ◽  
Shao ◽  
...  
Keyword(s):  
Voltage Sag ◽  
Equivalent Network ◽  
Compensation Strategy ◽  
Dynamic Voltage Restorer ◽  
Voltage Quality ◽  
Voltage Change ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Compensation Device ◽  
Strategy Design

Dynamic voltage restorer (DVR) is a compensation device that can effectively improve power quality, and it is widely used to compensate the voltage sag on sensitive loads. However, DVR will affect the operation of the sensitive loads in parallel at the same busbar (such parallel are defined as adjacent loads) in the process of improving sensitive load voltage quality. With the externality theory, this paper proposes a solution to clarify the influence of DVR on the adjacent load and handle the possible controversy. This paper first establishes a simple system that consists of a DVR, sensitive loads, and adjacent loads. Based on the equivalent network, the influence of the DVR on the adjacent load is analyzed in terms of voltage change and power consumed. The externality boundaries are clearly defined when considering network parameters in order to fairly deal with the interaction of multi entities. Afterwards, an optimization compensation strategy that is based on externality theory is proposed. Finally, the simulation on compensation strategy is tested on the MATLAB/Simulink platform to demonstrate the feasibility and effectiveness of the proposed method.

scholarly journals PMU and DVR based Power System Monitoring, Controlling and Voltage sag Compensation

2020 ◽  
Vol 32 ◽  
pp. 01006
Author(s):  
Abhishek Chalwadi ◽  
Kiruthika M ◽  
Bindu S
Keyword(s):  
Power System ◽  
Power Quality ◽  
Measurement Unit ◽  
Voltage Sag ◽  
Dynamic Voltage Restorer ◽  
Power System Monitoring ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
The Difference ◽  
Compensation Device

The power system network is becoming dense and much more complex. Dynamic and continuous monitoring of the power system network is required to avoid power outages. Phasor Measurement Unit (PMU) is one such device that provides state estimation parameters of dynamic power system networks that are used for designing relays and controlling the system network. Power Quality problems such as voltage sags and swells can damage the sensitive load and cause abnormal voltage, current, and frequency conditions in a power system network. Fast and major developments in power electronics technology have made it possible to mitigate the power quality problems. Dynamic Voltage Restorer (DVR) is a voltage sag compensation device that compensates the difference in voltage avoiding interruptions and restores the voltage to the pre-fault value. This paper discusses a technique used for monitoring, protecting, and controlling the system under fault condition using PMU and compensate voltage sag for a sensitive load using DVR based on the data collected by placing PMU in an optimal location. The outcome of the above analysis is recorded which shows that effective monitoring, controlling, and voltage sag compensation can be done with less number of PMU’s placed optimally in conjunction with DVR.

scholarly journals Contemporary Control of DG Integrated DVR for Sag, Swell and Harmonic Mitigation

2018 ◽  
Vol 8 (5) ◽  
pp. 2721
Author(s):  
Syed Suraya ◽  
P. Sujatha ◽  
P. Bharat Kumar
Keyword(s):  
Control Strategy ◽  
Voltage Source ◽  
Voltage Sag ◽  
Voltage Source Converter ◽  
Voltage Profile ◽  
Pv System ◽  
Dynamic Voltage Restorer ◽  
Voltage Quality ◽  
Voltage Restorer ◽  
Dynamic Voltage

This paper presents a novel control strategy to control DG integrated DVR (dynamic voltage restorer) for mitigation voltage quality problems. Power quality is the most concerning areas in power engineering and voltage quality is of prime focus. Voltage sag, voltage swell and harmonics in voltage causes deterioration in quality of voltage delivered to load. A minor disturbance in voltage profile can degrade the performance of load. Dynamic voltage restorer is a quick responsive custom power device for voltage quality improvement. Photovoltaic (PV) system is considered as DG and output voltage of PV system is boosted with a boost converter to support voltage source converter of DVR. DG integrated DVR with novel control strategy for mitigation of voltage sag, swell and voltage harmonic is presented in this paper. The power system model with DG integrated DVR is developed and results are obtained using MATLAB/SIMULINK. Results are discussed during pre and post sag/swell condition with compensation and THD in voltage is maintained within nominal values.

scholarly journals Comparative study of Different Topologies of Solar Photovoltaic fed Impedance-Source Inverter based Dynamic Voltage Restorer

2021 ◽  
Vol 9 ◽  
Author(s):  
Miska Prasad ◽  
◽  
Almoataz Youssef Abdelaziz ◽  
Ashok Kumar Akella ◽  
◽  
...  
Keyword(s):  
Solar System ◽  
Comparative Study ◽  
Voltage Sag ◽  
Solar Photovoltaic ◽  
Nonlinear Loads ◽  
Dynamic Voltage Restorer ◽  
Voltage Quality ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Voltage Swell

All customers require quality voltage, quality current and quality power from the utility, but usage of nonlinear loads generates voltage sag, swell and harmonics. This work examines the solar energy based various topologies like 3-Leg, 4-Leg, and 6-Leg Dynamic Voltage Restorer (DVR) for minimizing the voltage swell. To get most prominent power from the solar system Perturb & Observe (P&O) scheme is also used. The most famous topologies are approved utilizing MATLAB/SIMULINK programming to limiting voltage swell. The gained results are comparable nonetheless even possibly better in 6-leg PV-ZSI-DVR diverged from 3-leg and 4-leg PV-ZSI based DVRs.

Performance Analysis of DVR Using ANN Controller for Voltage Quality Enhancement

2014 ◽  
Vol 573 ◽  
pp. 356-361 ◽  
Author(s):  
P. Sathish Babu ◽  
N. Kamaraj
Keyword(s):  
Harmonic Distortion ◽  
Voltage Sag ◽  
Simulation Studies ◽  
Dynamic Voltage Restorer ◽  
Voltage Quality ◽  
Linear Load ◽  
Voltage Restorer ◽  
Three Phase ◽  
Dynamic Voltage ◽  
Non Linear Load

This paper presents a Dynamic Voltage Restorer to mitigate power quality disturbances such as voltage sag, swell and harmonics. The compensation strategy is based on pre-sag compensation. Controller based on dq0 transformation technique and ANN is implemented in order to maintain the nominal load voltage and phase angle. Simulation studies under three phase rectifier with parallel resistive/capacitive dc load as a non linear load is carried out. Also the system is investigated under voltage sag and swells on source side using programmable AC source. Simulation results show that DVR performs accurately in mitigating disturbances with minimum Total Harmonic Distortion. The performance of DVR is 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 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.

Sign in / Sign up

Export Citation Format

Share Document