220kV终端变电站负荷转供策略研究Research on Load Transfer Strategy of 220 kV Terminal Substation
戚峰,陈刚,钱碧甫,陈立
QI Feng,CHEN Gang,QIAN Bifu,CHEN Li
摘要(Abstract)：
介绍了浙江电网220kV终端变电站典型接线和负荷转供方式,总结其在实际运行中存在的不足。深入探讨局部小电源对负荷转供控制策略的影响,并采用捕捉同期合闸方案,通过精确捕捉最佳"合闸时机",实现了差频转供。另外,针对双母线中一条母线检修时常规负荷转供功能停用的缺陷,增设了相应的负荷转供方式,降低保护功能频繁投退带来的风险。改进后的装置显著提高系统的供电可靠性,且适用性强。
This paper introduces the typical connection and load transfer mode of 220 kV terminal substation in Zhejiang power grid and summarizes the problems in the actual operation. The influence of local small power supply on load transfer control strategy is profoundly discussed, and the programme of capturing synchronous switching is adopted, which realizes the transfer in difference frequency by accurately capturing the best "reclosing time". In addition, a load transfer mode is added due to malfunctioning of normal load transfer during maintenance of one bus to reduce the risk from frequent protective function switching. The improved device can significantly enhance the power supply reliability of the system and is of great applicability.
关键词(KeyWords)：
负荷转供;捕捉同期合闸技术;差频转供;供电可靠性
load transfer;capturing synchronous switching technology;transfer in different frequencies;power supply reliability
基金项目(Foundation):
作者(Author):
戚峰,陈刚,钱碧甫,陈立
QI Feng,CHEN Gang,QIAN Bifu,CHEN Li
DOI: 10.19585/j.zjdl.2016.09.003
参考文献(References)：
- [1]潘凯岩,刘仲尧,宋学清,等.自动负荷控制系统在佛山电网中的应用[J].电力系统自动化,2009,33(22):94-97.
- [2]刘金官,王展,汪献忠.220 k V微机型备用电源自动投入装置研究[J].电力自动化设备,2005,25(1):95-100.
- [3]杨建勋.光伏电站功率控制孤岛检测方法[J].河北理工大学学报(自然科学版),2010,32(4):65-69.
- [4]王维检.电气主设备继电保护原理与应用[M].北京:中国电力出版社,1996.
- [5]王杨,万凌云,胡博,等.基于孤岛运行特性的微电网可靠性分析[J].电网技术,2014,38(9):2379-2385.
- [6]周晓宁,徐伟,胥传普,等.计及负荷转供措施的电网设备过载辅助决策[J].电力系统保护与控制,2013,41(23):61-66.
- [7]郗来君.变电站自动化系统中安全自动装置的几个问题[J].黑龙江科技信息,2011(27):28.
- [8]韩晋,黄健.同期捕捉算法的改进及实现[J].电力自动化设备,2013,33(9):108-112.
- [9]曾锋.AP1000核电厂厂用电切换方式探讨[J].电气应用,2013,31(12):87-91.