Synchronous Reference Frame Theory Based Shunt Active Filter For Harmonic and Unbalance Compensation

Today’s power requirements are vastly different from those of the past, due to the growing utilization of nonlinear loads. Most of the power electronic loads used in the system are mainly nonlinear, which can lead to system inefficiencies and poor power factor. These kinds of loads introduce a lot of harmonics into the power system, increasing energy losses and having an impact on nearby loads and sources. Active filters are employed to compensate for harmonic distortion, reactive power, and unbalance generated by nonlinear loads. This paper proposes a shunt active power filter for harmonic and unbalance compensation in power system connected with a nonlinear and unbalanced load. The control scheme is based on synchronous reference frame theory, to extract the reference current. The model is validated using simulation studies in MATLAB/SIMULINK. The proposed shunt active power filter has the potential to significantly reduce harmonics, unbalance, and also improves the system power factor.