Published Paper Details:

This paper deals with the design and implementation of variable hysteresis band voltage controller based dynamic voltage restorer (DVR). The aim of variable hysteresis band voltage controller is overcomes the major drawbacks in fixed hysteresis band voltage controller i.e., uneven stress on switches due to large ripples in filter currents and variation in switching frequency can be eliminated by using variable hysteresis band control scheme. The performance of the variable hysteresis band voltage controller based DVR depends on the values of system parameters and components and injects appropriate compensated voltages into the system and regulates the load voltages. The DVR is to mitigate all typical voltage related problems at the distribution system load center like voltage sag, voltage swell, voltage harmonics and interruptions etc. The compensation capability of this proposed topology is analyzed based on simulation studies and corresponding results are compared with different switching control strategies