中低压保护控制异构双重化方案研究
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摘要
110 k V以下电压等级电网出线间隔一般按远后备方式配置保护(单套配置),当主保护拒动时远后备保护无选择性切除故障,一定程度上降低了供电可靠性,出线间隔保护测控一体化装置存在异常后保护和远方控制功能同时失去的风险,造成一次设备较长时间无保护运行。研究了远后备配置方式下提升保护的选择性,并基于现阶段智能变电站的技术,提出一种通过增加智能化接口方式实现保护控制功能的异构双重化配置方案,以较低的成本增加为代价实现中低压保护的冗余配置,使远后备保护具有选择性。
For distribution networks below 110 k V with power supply task as main,it' s generally protected in remote backup mode,that is,the protection device is a single configuration. However,When the main protection is refused,the remote backup protection can't selectively eliminate the fault,which reduces the reliability of power supply to some extent. Therefore,it is necessary to study how to improve the protection selectivity in remote backup mode. In addition,when the integrated protection and control equipment is abnormal,protection and remote control function should be blocked,resulting in the primary equipment runs without protection for a long time. Based on technology accumulation of smart substation,this paper introduces an isomeric double configuration scheme of medium and low voltage protection by adding the intelligent interface to realize redundant configuration with lower cost. This scheme can solve the above problems and ensure the selectivity of remote backup protection.
For distribution networks below 110 k V with power supply task as main,it' s generally protected in remote backup mode,that is,the protection device is a single configuration. However,When the main protection is refused,the remote backup protection can't selectively eliminate the fault,which reduces the reliability of power supply to some extent. Therefore,it is necessary to study how to improve the protection selectivity in remote backup mode. In addition,when the integrated protection and control equipment is abnormal,protection and remote control function should be blocked,resulting in the primary equipment runs without protection for a long time. Based on technology accumulation of smart substation,this paper introduces an isomeric double configuration scheme of medium and low voltage protection by adding the intelligent interface to realize redundant configuration with lower cost. This scheme can solve the above problems and ensure the selectivity of remote backup protection.
引文
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[2]晏运忠,樊平,黄生春.单CPU微机馈线保护装置可靠性分析及改进措施[J].电工技术,2007(3):35-36.YAN Yunzhong,FAN Ping,HUANG Shengchun. Reliability analysis and improvement measures of single CPU microcomputer feeder protection unit[J]. Electric Engineering,2007(3):35-36.
[3]张保会,郝治国.智能电网继电保护研究的进展(二)——保护配合方式的发展[J].电力自动化设备,2010,30(2):1-4.ZHANG Baohui,HAO Zhiguo. Development of relay protection for smart grid(2):development of protection cooperation mode[J]. Electric Power Automation Equipment,2010,30(2):1-4.
[4]董新洲,曹润彬,崔柳,等.现代电力系统集成后备保护方案[J].电力系统保护与控制,2014,42(5):21-25.DONG Xinzhou,CAO Runbin,CUI Liu,et al. Integrated backup protection scheme in modern power system[J]. Power System Protection and Control,2014,42(5):21-25.
[5]黄建宇,张汉泉,邓明,等.一种90 W高功率以太网供电系统的设计[J].电源技术,2015,39(7):1493-1495.HUANG Jianyu,ZHANG Hanquan,DENG Ming,et al. Design of a 90 W high power power-over-ethernet system[J]. Chinese Journal of Power Sources,2015,39(7):1493-1495.
[6]王昌照.基于大数据的“三统一”配电网规划辅助决策系统[J].供用电,2017,34(1):32-37,23.WANG Changzhao."Three unified"decision-making support system of distribution network planning based on big data[J].Distribution&Utilization,2017,34(1):32-37,23.
[7]黄秀丽,马媛媛,费稼轩,等.配电自动化系统信息安全防护设计[J].供用电,2018,35(3):47-51.HUANG Xiuli,MA Yuanyuan,FEI Jiaxuan,et al. Research on information security certification evaluation index system of power distribution automation system[J]. Distribution&Utilization,2018,35(3):47-51.
[8]Data terminal equipment(DTE)power via media dependant interface(MDI):IEEE 802.3af—2003[S]. IEEE Computer Society,June,2003.
[9]杜振华,王建勇,罗奕飞,等.基于MMS和GOOSE网合一的数字化网络保护设计[J].电力系统保护与控制,2010,38(24):143-150.DU Zhenhua,WANG Jianyong,LUO Yifei,et al. A design of digital substation network protection based on combination of MMS and GOOSE network[J]. Power System Protection and Control,2010,38(24):143-150.
[10]胡云.高功率以太网供电的应用分析[J].低压电器,2011(12):24-28.HU Yun. Application analysis of high-power power over ethernet[J]. Low Voltage Apparatus,2011(12):24-28.
[11]3~110 k V电网继电保护装置运行整定规程:DL/T 584—2007[S].Setting guide for 3~110 k V power system protection equipment:DL/T 584—2007[S].
[12]何鸣,叶远波,陈实.变压器中低压侧后备保护配置及整定方案[J].电网技术,2006,30(16):89-91.HE Ming,YE Yuanbo,CHEN Shi. Configuration and setting scheme of backup protection for transformer's medium and low voltage side[J]. Power Network Technology, 2006, 30(16):89-91.
[13]赵敏,王素华. 220 k V变电站主变后备保护与10 k V侧出线保护配合问题的探讨[J].电力系统保护与控制,2009,37(7):95-97.ZHAO Min,WANG Suhua. Discussion on coordination of 220k V substation main transformer back-up protection and the protection of 10 k V side[J]. Power System Protection and Control,2009,37(7):95-97.