带并联电抗器的交流特高压输电线路单相自适应重合闸故障识别方法(英文)  

Fault Nature Identification Method for Single-phase Adaptive Reclosure on UHVAC Transmission Lines with Shunt Reactors

作　　者：LIN Xin XIE Yinzhi SUI Dongpeng XU Jianyuan LIU Yang 

机构地区：[1]School of Electrical Engineering,Shenyang University of Technology [2]Liaoning Province Key Lab of Power Grid Safe Operation and Monitoring

出　　处：《高电压技术》2013年第4期769-775,共7页High Voltage Engineering

基　　金：Project supported by National Natural Science Foundation of China(51177104);Liaoning Provincial National Natural Science Foundation of China(201102169)

摘　　要：In order to avoid single-phase adaptive reclosure overlap in a permanent fault,accurate identification of the fault types on transmission line is necessary.We present a fault nature identification method for ultra-high voltage alternating current(UHVAC) transmission lines with shunt reactor.The voltage amplitude ratios of the neutral small reactance voltage to terminal voltage under transient fault and permanent fault are calculated.The significant differences of the ratio under the two faults have been analyzed.It is found that the ratio can be a criterion to distinguish the fault type,transient or permanent,accurately.Additionally,we also proposed a method that delays a beat frequency oscillation cycle to decide the fault types for the existence of beat frequency oscillation which will cause misidentification on transient faults.Abundant simulation results of ATP/EMTP show that the voltage amplitude ratio under transient fault is between 0.6 and 0.7,which is bigger than 2.5,the ratio under permanent fault.In order to avoid single-phase adaptive reclosure overlap in a permanent fault, accurate identification of the fault types on transmission line is necessary. We present a fault nature identification method for ultra-high voltage alternating current （UHVAC） transmission lines with shunt reactor. The voltage amplitude ratios of the neutral small reactance voltage to terminal voltage under transient fault and permanent fault are calculated. The significant differences of the ratio under the two faults have been analyzed. It is found that the ratio can be a criterion to distinguish the fault type, transient or permanent, accurately. Additionally, we also proposed a method that delays a beat frequency oscillation cycle to decide the fault types for the existence of beat frequency oscillation which will cause misidentification on transient faults. Abundant simulation results of ATP/EMTP show that the voltage amplitude ratio under transient fault is between 0.6 and 0.7, which is bigger than 2.5, the ratio under permanent fault.

关 键 词：单相自适应重合闸 特高压输电线路 高压并联电抗器 识别方法 故障性质 永久性故障 故障类型 瞬态故障 

分 类 号：TM726.1[电气工程—电力系统及自动化] TM726