Electro-magnetic Analysis for 750kV Double Circuit Compact Transmission System When Applying Controllable Shunt Reactor

Presently, CSR has not been applied into 750kV power grid through the worldwide. Based on a planning 750kV double circuit compact transmission project in China, this paper researches some electromagnetic issues such as power frequency overvoltage, secondary-arc current and recovery voltage, and load rejection switching surge characteristics of this system when applying controllable shunt reactors (CSR for short) by EMTP program. Aiming at suppressing the electromagnetic issues below the relevant standards, a kind of operating control strategy for 750kV CSR is put forward in this paper. Thereby, it makes CSR to be able to settle the contradiction between suppressing overvoltage level and improving reactive power equivalence performance effectively, which is helpful to enhance system stability and operation economical efficiency. Because of the merits, CSR has good foreground in EHV and UHV power grid in and abroad.