CAJ | 학술논문

介绍了溪洛渡至浙江金华(简称宾金)特高压直流输电系统线路保护动作情况,指出直流线路间电磁耦合产生的扰动导致了非故障极电压突变量保护动作.建立了特高压直流输电线路电磁耦合分析的电路模型,推导出解析方程,并对电磁耦合机理和扰动特征进行了深入的研究.经过RTDS仿真,分析了区内、区外故障时的直流电压波形特征,提出了电压突变量保护功能的优化策略.新的保护逻辑通过仿真试验,验证了其可行性和可靠性.
개소료계락도지절강금화(간칭빈금)특고압직류수전계통선로보호동작정황,지출직류선로간전자우합산생적우동도치료비고장겁전압돌변량보호동작.건립료특고압직류수전선로전자우합분석적전로모형,추도출해석방정,병대전자우합궤리화우동특정진행료심입적연구.경과RTDS방진,분석료구내、구외고장시적직류전압파형특정,제출료전압돌변량보호공능적우화책략.신적보호라집통과방진시험,험증료기가행성화가고성.
This paper introduces the line protection action of UHVDC power transmission project from Xiluodu to Zhejiang Jinhua (abbr. Bin-Jin), and points out that the disturbance of DC lines electromagnetic coupling causes non-fault pole voltage derivative protection action. The circuit model for electromagnetic coupling analysis of UHVDC power transmission lines is explored. The analytic equation is deduced and the electromagnetic coupling mechanism and disturbance characteristics are studied in depth. The optimization strategy of voltage derivative protection function based on the RTDS simulation and the analysis of DC voltage waves characteristics in external and internal faults are proposed. The new protection logic verifies its feasibility and reliability through the simulation test.