Harmonics Resonance Effect Solution in Industrial Systems using Active Static Compensation Circuit

Most of the industrial loads are linear and nonlinear loads, which generate harmonics and poor power factor. Capacitor banks or passive power filters can be used to correct power factor and eliminate certain harmonics which may cause resonance between the power system inductance and the compensation circuits. It is required to avoid the effect of resonance even when new methods and techniques are used for improving power quality. Active static compensation circuit (ASCC) is designed and used in this paper to improve the system power quality at different load conditions. The proposed ASCC is controlled using adaptation modified pulse width modulation (AMPWM). The MPWM algorithm is built to drive the ASCC in order to eliminate resonance effects, reduce THD in the AC source, and improve power factor simultaneously at different load conditions. Simulation results clarify that the suggested ASCC is effective in improving power quality of the system at both steady-state and dynamic operating conditions.