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混合MIDC馈入下的工频变化量阻抗方向保护 动作特性分析
引用本文:徐岩,刘泽锴,应璐曼.混合MIDC馈入下的工频变化量阻抗方向保护 动作特性分析[J].继电器,2015,43(5):14-20.
作者姓名:徐岩  刘泽锴  应璐曼
作者单位:新能源电力系统国家重点实验室(华北电力大学),河北 保定 071003;新能源电力系统国家重点实验室(华北电力大学),河北 保定 071003;新能源电力系统国家重点实验室(华北电力大学),河北 保定 071003
摘    要:交流电网故障引发线路换相换流器高压直流(Line Commutated Converter High Voltage Direct Current, LCC-HVDC)换相失败,改变了原有交流电网工频变化量方向保护动作特性。针对这一问题,建立了由电压源换流器高压直流(Voltage Source Converter HVDC, VSC-HVDC)系统与LCC-HVDC系统组成的混合多馈入直流(bybrid multi-infeed HVDC,HMIDC)输电系统模型,并与馈入同一交流电网的单条LCC-HV

关 键 词:线路换相换流器高压直流  电压源换流器高压直流  混合多馈入直流  工频变化量  方向纵联保护  换相失败
收稿时间:2014/5/23 0:00:00

Performance of impedance directional protection based on variation of power-frequency components in hybrid multi-infeed HVDC system
XU Yan,LIU Zekai and YIN Luman.Performance of impedance directional protection based on variation of power-frequency components in hybrid multi-infeed HVDC system[J].Relay,2015,43(5):14-20.
Authors:XU Yan  LIU Zekai and YIN Luman
Affiliation:State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Baoding 071003, China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Baoding 071003, China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Baoding 071003, China
Abstract:The LCC-HVDC commutation failure caused by AC power network fault affects the operation of directional protection based on power-frequency component variation for AC transmission lines. A hybrid multi-infeed HVDC system model consisted of a VSC-HVDC system and a LCC-HVDC system is set up, compared with a AC/DC system of a single LCC-HVDC system fed into the same AC grid. Combined with the characteristic of the analysis of power-frequency component variation based on the principle of directional protection, the performance of LCC-HVDC equivalent impedance of power-frequency component variation is quantitatively analyzed under the same commutation failure in LCC-HVDC system of this two different transmission structures. The simulations of two different structures for the same commutation failure of HVDC in identical fault simulated by PSCAD/EMTDC testify the accuracy and validity of the theory analysis. It indicates that the hybrid multi-infeed HVDC system can improve the impact of directional protection based on power-frequency component variation caused by the LCC-HVDC commutation failure and provides the theoretical basis for the power network planning.
Keywords:line commutated converter high voltage direct current  voltage source converter HVDC  hybrid multi-infeed HVDC  power-frequency component variation  directional pilot protection  commutation failure
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