alexa Dynamic Voltage Restorer Based 5-Level Flying Capacitor Multilevel Converter For Power Quality Improvement
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
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Research Article

Dynamic Voltage Restorer Based 5-Level Flying Capacitor Multilevel Converter For Power Quality Improvement

N. Damodaram1 and K. Lokanadham2
  1. M.Tech (PE&ED) Student, Dept. of EEE, SVCET, India
  2. Associate Professor, Dept. of EEE, SVCET, India
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Abstract

This paper presents the application of dynamic voltage restorers (DVR) on power distribution systems for mitigation of voltage sags, harmonics and imbalances at sensitive loads. The dynamic voltage restorer (DVR) has become popular as a cost effective solution for the protection of sensitive loads from voltage sags and swells. It would be advantageous that a DVR could also be used to compensate any steady state load voltage harmonics, since this would increase the Power Quality. The DVR, which is based on a five-level flying-capacitor voltage Source converter (VSC), has been proved suitable for the task of compensating voltage disturbances. The performance of the DVR depends on control technique involved. This paper presents the control system based on the so-called repetitive control. Unlike other control schemes with a comparable range of applicability, only one controller is needed to cancel out all three disturbances simultaneously, while exhibiting good dynamic performance. To evaluate the quality of the load voltage during the operation of DVR, Total Harmonic Distortion (THD) is calculated. MATLAB are used to carry out all modelling aspects of the repetitive controller and test system. Simulation results show that the control approach performs very effectively and yields excellent voltage regulation.

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