Performance Analysis of DVR and DSTATCOM in Distribution network for Voltage Sag and Swell Conditions

Due to the increase in sensitive loads to power disturbances, power quality issues became one of the major concerns in many of the distribution systems and industries. The majority of events causing the power quality issues are because of voltage sag and voltage swell. In a distribution system, it is very important that the fault should be removed immediately so that the whole system is protected and the service is not interrupted. In this paper, the performance of Dynamic Voltage Restorer (DVR) and Distribution Static Compensator (DSTATCOM) is analysed by simulated with PWM control scheme using PSCAD. The simulations were carried out with various test cases associated with voltage sag and swell due to three phase short circuit fault, inductive and capacitive load switching conditions. The analysis of DVR and DSTATCOM was done based on the compensation of each device for various power quality problems. Results are presented for DVR and DSTATCOM showing the compensation of voltage sag/swell for various test conditions.