1000 kV特高压线路电压检测二次回路分析及改进
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摘要
1 000 kV线路电压检测回路广泛应用于特高压变电站站内控制保护系统,相比于超高压变电站,特高压变电站对线路电压检测的要求更为严苛。目前采用的1 000 kV线路电压检测方案故障率高,不能满足现场要求。以1 000 kV特高压南阳站长南Ⅰ线和南荆Ⅰ线间隔线路电压检测继电器及其二次回路设计方案为例,分析其存在问题,提出将电磁型电压中间继电器更改为固态继电器、安装地点更改为继电保护小室电压转接屏和采用测控装置实现电压检测的改进方案,对后续交流特高压工程的设计、运维和检修具有借鉴意义。
The 1 000 kV line voltage detection loop is widely used in the control and protection system of ultra-high voltage substations. Compared with extra-high voltage substations, ultra-high voltage substations have more stringent requirements for line voltage detection. The current 1 000 kV line voltage detection programme has a high failure rate and cannot meet field requirements. Taking the design scheme of the interval line voltage detection relay and its secondary circuit of the 1 000 kV ultra-high pressure Nanyang station Changnan I line and Nanjing I line for instance, this paper proposes an improved scheme of changing electromagnetic intermediate relay into solid state relay, changing installation location into relay protection small room voltage switch screen and using measurement and control device to realize voltage detection, which can be used for reference for the design, operation, maintenance and maintenance of the subsequent AC UHV project.
The 1 000 kV line voltage detection loop is widely used in the control and protection system of ultra-high voltage substations. Compared with extra-high voltage substations, ultra-high voltage substations have more stringent requirements for line voltage detection. The current 1 000 kV line voltage detection programme has a high failure rate and cannot meet field requirements. Taking the design scheme of the interval line voltage detection relay and its secondary circuit of the 1 000 kV ultra-high pressure Nanyang station Changnan I line and Nanjing I line for instance, this paper proposes an improved scheme of changing electromagnetic intermediate relay into solid state relay, changing installation location into relay protection small room voltage switch screen and using measurement and control device to realize voltage detection, which can be used for reference for the design, operation, maintenance and maintenance of the subsequent AC UHV project.
引文
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[12]吴士普,吴细秀,李璿,等.1 000 kV CVT运行状态下误差测试技术研究[J].电力系统保护与控制,2018,46(3):122-127.
[13]韩晋思,刘卫明,张明明,等.220 kV变电站电容式电压互感器故障分析[J].水电能源科学,2018,36(8):175-176.
[14]孟恒信.出口继电器安全动作功率分析[J].电力系统自动化,2009,33(6):104-107.
[2]王宇,吕旭东,王维振,等.500 kV电压互感器二次侧过电压的故障分析[J].浙江电力,2017,36(5):20-22.
[3]夏震,刘宏耀,豆河伟,等.关于电容式电压互感器电压异常原因探讨及预控措施[J].变压器,2018,55(10):64-67.
[4]贾凤鸣,吴胜,杜鹏,等.一种高抗干扰的远传式SF6气体密度继电器的研制[J].高压电器,2018,54(3):238-242.
[5]刘涛,李茹勤,裴东良,等.特高压主变冷却器双电源系统误并列事故分析[J].电力科学与工程,2015,31(9):60-65.
[6]任万滨,陈英华,康云志,等.电磁继电器振动极限加速度分析方法[J].电工技术学报,2011,26(1):63-67.
[7]翟国富,任万滨,许峰,等.电磁继电器触簧系统振动极限加速度的分析方法[J].振动工程学报,2004,17(1):66-71.
[8]李明节.大规模特高压交直流混联电网特性分析与运行控制[J].电网技术,2016,40(4):985-991.
[9]刘涛,裴东良,徐瑞娜,等.1 000 kV HGIS隔离/接地刀闸控制触点频繁烧损事故分析及改进[J].华北电力技术,2017(5):60-65.
[10]金佳敏,潘益伟.GW7-252型隔离开关故障分析与改造[J].浙江电力,2014,33(2):63-65.
[11]闫培丽,王红晋,郭亚昌,等.电流互感器、电压互感器二次参数选择问题研究[J].中国电力,2009,42(6):55-59.
[12]吴士普,吴细秀,李璿,等.1 000 kV CVT运行状态下误差测试技术研究[J].电力系统保护与控制,2018,46(3):122-127.
[13]韩晋思,刘卫明,张明明,等.220 kV变电站电容式电压互感器故障分析[J].水电能源科学,2018,36(8):175-176.
[14]孟恒信.出口继电器安全动作功率分析[J].电力系统自动化,2009,33(6):104-107.