With the rapid development of electric power industry in China

high voltage transmission network in large scale is formed and

at the same time

the requirement to reactive power of power grid is increasingly strict. The importance of multi-path cascade compensation device with intelligent capacitor is described by way of performance comparison and analysis between traditional reactive compensation device and intelligent capacitor compensation device. The field application

the safety cautions in operation and the existed problems of present intelligent capacitor compensation device are analyzed in detail and suggestion and countermeasures are proposed.