Particle Swarm Optimized Sliding Mode Controller for an AC-DC Boost Converter

Sliding mode controllers are widely used for the control of non linear systems. This paper presents a systematic approach to the design of a sliding mode controller for power factor correction application of an AC-DC converter. Sliding mode control gives an improvement in the static and dynamic performance in case of large disturbances. The sliding surface considered here consists of two variables, output voltage and rectified input current. This two variable surface reacts against various disturbances like input power variations and load variations. Tuning of optimum values for sliding coefficients is done using particle swarm optimization. An improved power factor correction is achieved and expected output voltage is also obtained. It is also observed that the system yields good line and load regulation.