Abstrakt

Power Quality Enhancement by Using Dstatcom With Reduced Number Of Sensors

K.Maniraj

The main objective of the project is to enhance the power quality by using dstatcom with reduced number of sensors. The control algorithm also proposed with reduced number of current and voltage sensors. a current control technique is proposed to control the reactive power flow from a grid through a three-phase parallel-connected inverter to the load. The parallel-connected inverter ensures active and reactive power flow from the grid with lowcurrent total harmonic distortion even in the presence of nonlinear load. A p–q theory-based Hilbert transformation approach is used to find the reference current of the parallel-connected inverter to ensure desired operating conditions at the grid terminal. The proposed current controller is simple to implement and gives superior performance over the conventional current controllers, such as rotating frame proportional–integral controller or stationary frame proportional resonant controller. The stability of the proposed controller is ensured by direct Lyapunov method. Detailed experimental results are presented to show the efficacy of the proposed current control scheme along with the proposed nonlinear controller to control the reactive power flow and to eliminate the THD in the source current