Description: This paper deals with the design and implementation of
a multilevel voltage source converter based static synchronous
compensator (STATCOM) employing an effective modulation
control technique simulated in a MATLAB Simulink
environment. The main objective of this paper is to maintain the
voltage stability by compensating the reactive power in the power
system. Hence, a new efficient control strategy is proposed, in
order to reduce the voltage fluctuations like sag and swell
conditions and also to isolate current and voltage harmonics in
the transmission system. The multilevel STATCOM which can be
used at the point of common coupling (PC C), for improving
power quality is modelled and simulated using proposed control
strategy and the performance is compared by applying it to an
llOkv line with and without STATCOM. Relative Harmonic
analysis is also discussed in this paper based on the total
harmonic distortion (THD) calculations.
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