MFLC-PI CONTROLLED TWO LEVEL INVERTER BASED D-STATCOM FOR WIND ENERGY SYSTEMS

Improving power quality which is an important concept in wind energy systems, Static Synchronous Compensator (STATCOM) has begun to be used instead of traditionally used static compensators and fixed mechanical switched capacitor groups. One of the Flexible Alternating Current Transmission System (FACTS) devices used to improve power quality is STATCOM device. STATCOM devices used in energy distribution systems are called Distribution STATCOM (D-STATCOM). D-STATCOM used to improve the quality of power in distribution systems is an inverter based device. For the control of the D-STATCOM device is usually performed PI controller with fixed parameters. In this study, D-STATCOM device has a two level voltage source inverter structure in wind energy distribution systems. Indirect current control method based on synchronous reference frame theory is used to produce gate signals for inverter. For control of these currents, parameters of the PI controller determined by a Modified Fuzzy Logic Controller (MFLC) which is called PI with modified FLC (MFLC-PI) is proposed for D-STATCOM. The proposed controller and D-STATCOM topologies for wind energy distribution systems are simulated in Matlab/Simulink environment.