| 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. |
| 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 |
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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 |
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| A new phase combined line current differential relay for two-phase transmission line |
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HE Jian-zong, XU Xiao-chun, ZENG Zi-xian1, WANG Hui-qiang1, ZENG Wei-zhong1, LI Yuan-yuan2, ZHAO Qing-chun2, LIU Ge-ming2
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1.Dongguan Power Supply Bureau, Dongguan 523000, China;2.NARI-RELAYS Co., Ltd, Nanjing 211102, China
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| 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 |
