REACTIVE POWER COMPENSATION USING MULTI-LEVEL INVERTER AS SHUNT ACTIVE POWER FILTER

Abstract

Since the introduction of power electronics in 1960s, the number of nonlinear loads has increased significantly. The use of the power electronic devices leads to reactive power problems and injection of harmonics in supply system causing power quality issues. It is becoming really difficult to maintain the quality of power at the customer end. Poor power quality leads to misoperation of the power system devices like relays, operation failure of the electronic devices and so many other problems. Hence, to achieve better performance, highly efficient and compact, power electronic technologies are used now a days. In this dissertation work, to overcome power quality related problems in a system, shunt active filter performance evaluation with the use of MATLAB/ Simulink is carried out. To control the shunt filter reactive power theory is presented. The control circuits are implemented with the help of DS1104. The simulation of three legged , capacitor mid-point and three level diode clamped Multilevel Inverter topology has been done in MATLAB/Simulink. A working Hardware Prototype is developed and results are verified as per simulation