Modeling and Simulation of a Dynamic Voltage Restorer project for EEE

Power quality is one of major concerns in the present era. It has become important, especially, with the introduction of sophisticated devices, whose performance is very sensitive to the quality of power supply that results in a failure of end use equipment. One of the major problems dealt here is the voltage sag.

To solve this problem, custom power devices are used. One of those devices is the Dynamic Voltage Restorer (DVR), which is the most efficient and effective modern custom power device used in power distribution networks. Its appeal includes lower cost, smaller size, and its fast dynamic response to the disturbance.

It can provide the most commercial solution to mitigation voltage sag by injecting voltage as well as power into the system. This paper presents modeling, analysis and simulation of a Dynamic Voltage Restorer (DVR) using MATLAB. The efficiency of the DVR depends on the performance of the efficiency control technique involved in switching the inverters. In this model a PI controller and Discrete PWM pulse generator was used.

Abrivations:

IEEE                   Institute of Electrical and Electronics Engineers

IGBT                  Insulated Gate Bipolar Transistors

IGCT                  Integrated Gate Commutated Thyristors

IPAC                  In-phase Advanced Compensation

KV                      kilovolt

MOSFET           Metal Oxide Semiconductor Field Effect Transistors

ms                       mili second

MSSC                 Mechanical switching shunt capacitors

MVA                  megavolt ampere

MVAR               mega volt amps reactive

MW                    megawatt

p.u.                     Per unit

PCC                   point of common coupling

PWM                 Pulse Width Modulation

RMS                   root mean square

SCADA              Supervisory Control And Data Acquisition

SEMI                  Semiconductor Equipment and Materials International

SETC                 Static Electronic Tap Changers

SMES                Superconducting Magnet Energy Storage

SSB                    Solid State breaker

SSFCL               Solid State Fault Current Limiter

SSTS                  Solid State Transfer Switch

SVC                   Static Var Compensator

TSC                   Thyristor Switched Capacitors

UPQC               Unified power quality conditioner

UPS                   Uninterruptible Power Supplies

VSC                  Voltage Source Converter

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