CAJ | 학술논문

通过对两相式输电线路和三相式输电线路的结构和运行特征的对比，结合目前两相式输电线路的继电保护配置方式，总结出两相式输电线路对常规继电保护装置的影响，同时指出了目前两相式电力牵引供电线路保护配置存在的缺陷。结合光纤电流差动保护的优点以及目前差动保护的应用情况，该方法提出了一种适用于两相式输电线路的相组合的差动保护方法，可以根据线路的实际运行方式投入对应相的差动以及和流差动功能。该方法可以满足220 kV两相式输电线路快速跳闸的需求，能够极大程度地提高系统的稳定性和对牵引系统的供电可靠性。
통과대량상식수전선로화삼상식수전선로적결구화운행특정적대비，결합목전량상식수전선로적계전보호배치방식，총결출량상식수전선로대상규계전보호장치적영향，동시지출료목전량상식전력견인공전선로보호배치존재적결함。결합광섬전류차동보호적우점이급목전차동보호적응용정황，해방법제출료일충괄용우량상식수전선로적상조합적차동보호방법，가이근거선로적실제운행방식투입대응상적차동이급화류차동공능。해방법가이만족220 kV량상식수전선로쾌속도갑적수구，능구겁대정도지제고계통적은정성화대견인계통적공전가고성。
Based on the comparison of the structure and operation characteristics between the 220 kV two-phase transmission line and three-phase transmission line, and combined with the normal protection configuration of two-phase transmission line at present, this paper summerizes the influence of two-phase transmission line on conventional relay protection device and figures out the disadvantages of the protection configuration of two-phase electric traction power supply line. Considering the advantages of optical line current differential protection and application of differential protection, this paper proposes a new phase-combined line current differential relay for two-phase transmission line. This protection relay contains phase current differential relay and neutral current differential relay. It can satisfy the demand of fast tripping of the 220 kV two-phase transmission line which can greatly improve the stability of the power system and power supply reliability of traction system.