ACTIVE REACTIVE-POWER CONTROLLER

A novel technique for building reactive power compensators using the s witched-capacitor technique is presented. Normally when switched-capac itor are used for reactive power compensation they are operated at the supply frequency; in the proposed technique the capacitors are switch ed at higher frequencies, typically 800 Hz. The main advantages of thi s approach is that it provides a stepless variation in reactive power without the generation of harmonics as is the case with the convention al approach. The paper includes the details of theoretical and experim ental investigation carried out at Brunel to assess the new technique.