Application of STATCOM for harmonic mitigation and power factor improvement using direct current control technique

This paper focuses on the detailed analysis of STATCOM using direct current control method (DCC). This control is strongly recommended for harmonic elimination and reactive power control in the electric transmission system. In direct control method instantaneous value of system current is used for feedback control to achieve fast response. Compared to direct control method, indirect control method is simple but due to less response time and precise control, direct current control method is quite effective. An extensive digital simulation of the recommended STATCOM and its controller is carried out using MATLAB/SIMULINK software to study system performance and it is observed that using this control the overall power factor and Total Harmonic Distortion (THD) is improved.