Industrial Power Quality Resurgence Technique using DVR for Better System Performance

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Research areas:
Year:
2014
Type of Publication:
Article
Keywords:
Dynamic Voltage Restorer DVR, Voltage Sags, Pulsewidth-Modulation PWM, Power Quality PQ Electrical Storage Unit ESU, Voltage-Source Converter VSC
Authors:
Sagar Singh Baghel; A. K. Yadav
Journal:
IJAIM
Volume:
3
Number:
3
Pages:
73-78
Month:
November
Abstract:
The improvement in the quality of power and operate the sensitive loads satisfactorily, power electronics and advanced control technologies have made it possible. The sensitive unbalanced nonlinear loads can be protected from sag/swell, distortion and unbalance in supply voltage economically using the dynamic voltage restorer (DVR). One of the most important issues for power companies and their customers is power quality (PQ) requirement, voltage sag and swell is very serious problem for an industrial customer which needs quick response for its compensation. Various methods are used for the compensation of voltage sag and swell in both low voltage and medium voltage applications but one of the most popular method is DVR. As the injected voltage is in quadrature phase with the feeder current a capacitor-supported DVR does not need any active power during steady-state operation. The proposed algorithm makes use of the fundamental positive sequence phase voltages extracted by sensing only two unbalanced or distorted line voltages and also it is general enough to handle linear as well as nonlinear loads. Here the advantages and disadvantages of each possible configuration and control techniques pertaining to DVR are presented. The device behaviour is studied with the help of steady-state analysis,` and achievable performance is found with in limit.
Full text: IJAIM_349_Final.pdf

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