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Topologies and Control Strategies Implicated in Dynamic Voltage Restorer (DVR) for Power Quality Improvement

  • Rakeshwri PalEmail author
  • Sushma Gupta
Review Paper
  • 7 Downloads

Abstract

Controlled and improved power quality is one of the fundamental and essential needs in any industry driven by electric power for optimal exploitation of resources. However, in power quality, some crucial problems have been recognized as harmonic distortion, interruption, sag, swell and transient. Out of these, sag and swell are predominantly seen and cause stern impact on the electrical devices or machines and therefore require to be mitigated at an earliest to protect from any failure or mal-operation. As an ultimate key to crack these problems, some custom power devices such as distribution STATCOM (DSTATCOM), dynamic voltage restorer (DVR) and unified power quality conditioner are unanimously procured. A prominent custom power device DVR is apparently suggested in the literature for the mitigation of voltage sag and swells, with the benefit of active or/and reactive power control. The DVR is reported as being a high-performance solution to compensate voltage disturbances, since it provides both a cost-effective solution and very fast dynamics. In recent years, a bulk amount of the literature accounts for DVR on different configurations of its power circuit and various control techniques employed in it. This review article presents a detailed study on DVR with the different possible configurations of its power circuit and control techniques encircling major power quality issues. The informative object covered in the paper, articulate choice of control strategy and power circuit ensuring optimal recital of DVR in satisfying a required quality. This paper also furnishes the valued information for the investigator in this field.

Keywords

Compensation technique Direct AC/AC converter DVR IDVR Power quality Solar PV-based DVR Transformer-less DVR 

List of Symbols

APF

Active power filters

\( \angle V_{\text{inj}} = \theta_{\text{inj}} \)

Angle of injected DVR voltage

θ

Angle of load power

α

Angle of VDVR

δ

Angle of VTH

\( \beta \)

Angle of ZTH

SL

Apparent power

ANN

Artificial neural network

BESS

Battery energy storage systems

CHB

Cascaded h-bridge

Ki

Constant of integral

Kp

Constant of proportionality

VL

Load voltage magnitude

DG

Distributed generation

DSTATCOM

Distribution static compensator

DVR

Dynamic voltage restorer

FT

Fourier transform

FL

Fuzzy logic

IC

Incremental conductance

IDVR

Interline dynamic voltage restorer

PL

Load active power

IL

Load current

QL

Load reactive power

LV

Low voltage

MPPT

Maximum point tracking technique

MV

Medium voltage

MLI

Multilevel inverter

NPC

Neutral point clamped

PLL

Phase-locked loop

PV/SPV

Solar photovoltaic

PI

Proportional integral

RMS

Root mean square

SSTS

Solid-state transfer switches

SVPWM

Space vector pulse width modulation

SETC

Static electronic tap changers

SVC

Static VAR compensator

SMES

Superconducting magnetic energy systems

SMPS

Switched mode power supply

ZTH

System impedance

VTH

System voltage during fault condition

TSC

Thyristor-switched capacitors

THD

Total harmonic distortion

UPQC

Unified power quality conditioner

UPS

Uninterruptible power supply

VeSC

Vector switching converter

VAR

Volt-ampere reactive

\( \left| {\begin{array}{*{20}c} {V_{\text{inj}} } \\ \end{array} } \right| \)

Voltage injected by DVR

\( \left| {\begin{array}{*{20}c} {V_{\text{pre - sag}} } \\ \end{array} } \right| \)

Voltage magnitude before sag

\( \left| {\begin{array}{*{20}c} {V_{\text{sag}} } \\ \end{array} } \right| \)

Voltage magnitude during sag

VSC/VSI

Voltage source converter

VSI

Voltage source inverter

WT

Wavelet transform

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Copyright information

© Shiraz University 2019

Authors and Affiliations

  1. 1.Department of Electrical EngineeringMANITBhopalIndia

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