• Surendra

STATCOM can provide fast and efficient reactive power support to maintain power system voltage stability. In the literature, various STATCOM control methods have been discussed including many applications of PI controllers. However, these previous works obtain via a trial-and-error approach or extensive studies with a tradeoff of performance and applicability. Hence, control parameters for the optimal performance at a given operating point may not be effective at a different operating point. This project proposes a new control model based on fuzzy logic control, which can self-adjust the control gains during a disturbance such that the performance always matches a desired response, regardless of the change of operating condition. Since the adjustment is autonomous, this gives the plug-and-play capability for STATCOM operation. In the simulation test, the fuzzy logic control shows consistent excellence under various operating conditions, such as different initial control gains, different load levels, and change of transmission network, consecutive disturbances, and a severe disturbance. Here in STATCOM three phase five levels cascaded multilevel inverter is used as a voltage source converter. A threshold value of existing and proposed methods has been compared and the proposed threshold value is less than the existing system. Hence by using the fuzzy logic controller in proposed system reduced the threshold current and voltage values. So that improves the performance of operation in proposed system. The proposed method is simulated in 2013a MATLAB/SIMULINK.

Cascaded multilevel converter, distribution, STATCOM (DSTATCOM), distribution transformer, winding taps, passivity-based control.

"THREE PHASE FIVE LEVEL INVERTER BASED DSTATCOM USING FLC CONTROL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.835-841, August-2018, Available :http://www.jetir.org/papers/JETIR1808422.pdf

"THREE PHASE FIVE LEVEL INVERTER BASED DSTATCOM USING FLC CONTROL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp835-841, August-2018, Available at : http://www.jetir.org/papers/JETIR1808422.pdf