混合型SVC在藏中电网中的应用
尹大千,吴怡敏,李龙才
西南电力设计院有限公司,四川 成都 610021
摘 要:针对青藏直流投产初期输电容量较低和藏中电网存在电压和频率失稳风险的现状,提出在藏中电网装设静止无功补偿器SVC 来提高青藏直流输电能力和抑制系统故障时电压和频率的波动。对SVC 的配置容量、电压等级进行了论证,提出适合工程且较省费用的SVC 配置方案。通过系统仿真,对SVC 在拉萨燃机电厂开机和停运时的运行特性进行了分析。结果表明,提出的SVC 配置方案可增强系统故障时的稳定性,能明显提高青藏直流的输送容量。
关键词:藏中电网;静止无功补偿器;输电容量;系统稳定
中图分类号:TM714.3 文献标识码:B 文章编号:1007-3175(2015)12-0036-04
Application of Hybrid Static Var Compensator in Central Tibet Power Grid
YIN Da-qian, WU Yi-min, LI Long-cai
Southwest Electric Power Design Institute Co., Ltd, Chengdu 610021, China
Abstract: In view of lower transmission capacity of Qinghai-Tibet direct current (DC) initial stage of production and the current situation of unstable risk of voltage and frequency existing in central Tibet power grid, the static var compensator (SVC) was proposed to install in central Tibet power grid to improve the transmission capacity in Qinghai-Tibet HVDC project and to inhibit the fluctuation of voltage and frequency effectively in power system faults. The capacity configuration and voltage level of SVC were demonstrated and a configuration scheme suitable for the project with low cost was proposed. This paper analyzed the operation characteristics of SVC in the operation and outage of Lhasa oil-fired power plant by system simulation. The results indicate that the configuration scheme of SVC can enhance the stability of system in faults and improve the transmission capacity of Qinghai-Tibet HVDC project obviously.
Key words: central Tibet power grid; static var compensator; transmission capacity; system stability
参考文献
[1] 何志强,吴安平,高万良,等. 西藏中部电网高一级电压等级论证[J]. 电力建设,2009,30(12):25-27.
[2] 刘瑞丰,陈天恩,张浩,等. 青藏联网后电力交易有关问题探讨[J].电网与清洁能源,2011,27(12):53-56.
[3] 贾俊川,赵兵,罗煦之,等. 青藏直流投运后藏中电网稳定特性研究[J].电力系统保护与控制,2014,42(6):104-109.
[4] 吴冲,刘汉伟,董卫国,等. 青藏直流联网后藏中电网安全稳定控制系统的重构[J].电网与清洁能源,2013,29(1):54-57.
[5] 何志强. 西藏中部电网220 kV网架输变电工程可行性研究报告[R]. 成都:西南电力设计院,2012.
[6] 金立军,安世超,廖黎明,等. 国内外无功补偿研发现状与发展趋势[J]. 高压电器,2008,44(5):463-465.
[7] 朱岸明,王敏,焦熠琨,等. 大容量SVC 在750 kV电网中的应用[J]. 电网与清洁能源,2013,29(5):9-12.