引用本文: | 何建宗,徐晓春,曾子县,等.一种适用于两相式输电线路的相组合差动保护[J].电力系统保护与控制,2014,42(4):73-76.[点击复制] |
HE Jian-zong,XU Xiao-chun,ZENG Zi-xian,et al.A new phase combined line current differential relay for two-phase transmission line[J].Power System Protection and Control,2014,42(4):73-76[点击复制] |
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摘要: |
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。 |
关键词: 牵引站 两相式 超高压 相组合 差动保护 |
DOI:10.7667/j.issn.1674-3415.2014.04.012 |
投稿时间:2013-05-27修订日期:2013-07-04 |
基金项目: |
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A new phase combined line current differential relay for two-phase transmission line |
HE Jian-zong,XU Xiao-chun,ZENG Zi-xian,WANG Hui-qiang,ZENG Wei-zhong,LI Yuan-yuan,ZHAO Qing-chun,LIU Ge-ming |
(Dongguan Power Supply Bureau, Dongguan 523000, China;NARI-RELAYS Co., Ltd, Nanjing 211102, China) |
Abstract: |
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. |
Key words: traction substation two-phase UHV phase combined differential relay |