Authors : P.M. Balasubramaniam and S.U. Prabha
Abstract: The shunt active power filters are used in power systems for the compensation of harmonic currents generated for non linear loads. A reference current estimation method for control of SAPF using a digital filter based synchronous reference frame theory is presented. To extract the fundamental component of source current, the Synchronous Reference Frame (SRF) theory is suitable because of its easy mathematical calculation compared to the d-q Control algorithms. The compensation process is based on sensing line currents only which require sensing of harmonics or reactive power components of the load. Various simulation results are presented under steady-state conditions and the performance of PI controllers. Simulation results obtained with MATLAB and testing results on an experimental SAPF are presented to validate the proposed method. The synchronous reference frame based SAPF System to meet IEEE Standard 519 recommended harmonic standards for different rated nonlinear loads under balanced supply conditions.
P.M. Balasubramaniam and S.U. Prabha, 2014. A Practical Approach to Harmonic Compensation in Electrical Power Systems-Using Shunt Active Power Filter. International Journal of Soft Computing, 9: 160-168.