A 3-LEVEL ADVANCED STATIC VAR COMPENSATOR

An Advanced Static VAr Compensator(ASVC) employing a three level inver ter has been investigated for three phase applications. The paper desc ribes the operating principles of the ASVC using an elementary single phase ASVC circuit. The construction of a hardware model of the three phase, three level ASVC is then presented. The performance of the ASVC is obtained from an experimental study carried out on this laboratory model, The use of the selective harmonic elimination modulation (SHEM ) technique to minimize harmonics is explored. Experimental studies ha ve been carried out to determine the speed of response of the scheme b y controlling it in a closed loop.