A novel neutral grounding impedance optimal control system based on IGBT
On basis of IGBT control technology,a novel neutral grounding impedance optimal control system is proposed in this paper.The method is implemented by passive IGBT circuit to compensate the capacitive current in distribution network.When the operation of distribution network is normal,the IGBT circuit is off,the power frequency overvoltage will not be produced; when the single-phase grounding fault occurs,the IGBT circuit is on,the arc-suppression coil is put into operation,then through the corresponding control strategy of the IGBT on-off control,the grounding fault current can be fully compensated,fault arc can be extinguished instantaneously.The theory analysis and the MATLAB simulation results show that the proposed method has quick speed,wide adjustment range and low cost,the inductorcurrent can be adjusted continuously,the grounding fault current can be compensated effectively.
IGBT:Arc-suppression coil Capacitive current:PWM:Neutral point
Liu Weibo Li Jian Xiong Tingting Wang Yang Zeng Xiangjun
School of Electrical and Information Engineering Changsha University of Science and Technology,CSUST Changsha,China
国际会议
威海
英文
1494-1499
2011-07-06（万方平台首次上网日期，不代表论文的发表时间）