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Harmonics Suppression for Diesel Generator Based Isolated Generation System Using DSTATCOM- Comparison of Different Controllers

K. Lenin Ram Dr. R.P. Kumudini Devi

This paper describes the Harmonics Suppression for Diesel Generator based Isolated Generation System using distribution static synchronous compensator (DSTATCOM). Here two control schemes for DSTATCOM are compared. PI controller and Fuzzy logic controller. PI controller is a hysteresis current controlled technique which is used to maintain a constant voltage at the dc-bus of a voltage-source converter (VSC) working as a DSTATCOM. Switching of VSC is achieved by controlling source currents to follow reference currents using hysteresis-based PWM control. The operation of the two DSTATCOM control schemes for reducing the harmonic contents at the source side of the DG set is compared using MATLAB/SIMULINK model. The modeling is performed for a three-phase, threewire star connected synchronous generator coupled to a diesel engine, along with the three-leg VSC working as a DSTATCOM. Results are presented to verify the effectiveness of the control of DSTATCOM for harmonics reduction and an optimal operation of the DG set.