Mitigation of voltage flicker using phase-lock loop (PLL) controller of distribution synchronous static compensator (D-STATCOM)

The negative impact of power quality problem due to voltage flicker has gained a growing concern from utilities, especially in the areas of distribution planning. The EAF is observed to produce the most common severe voltage flicker in the industrial systems due to it random and stochastic characteristics. Thus, this paper has proposed a new controller for 6-pulse DSTATCOM based on Phase-Locked Loop (PLL) controller with Hysteresis Current Control (HCC) switching to mitigate voltage flicker in power system. The IEEE 6 bus distribution system has been used to analyze the capability of the proposed techniques. The simulation result shows that the linearity that exists in this proposed controller has a capability to mitigate voltage flicker at different frequencies below the maximum permissible curve level.

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