直流送受端故障对送端系统稳定性影响的对比分析及控制措施  

Comparison Analysis and Countermeasures on Impact of HVDC Sending- and Receiving-Side Contingencies on Sending-Side System Stability

作　　者：张健[1] 屠竞哲[1] 印永华[1] 刘明松[1] 林伟芳[1] 王琦[1] 罗煦之[1] 马士聪[1] 徐式蕴[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2016年第4期999-1004,共6页Power System Technology

基　　金：国家电网公司科技项目(XT71-15-050)~~

摘　　要：在电网"强直弱交"特性不断加强的形势下,送受端故障引起的多回直流换相失败和功率瞬降,都可能导致送端互联系统失稳。为此文章对比分析了送受端故障后的直流响应特性以及引发送端系统失稳的可能模式和影响程度,并在此基础上提出了多种控制措施,采用"三华"实际电网算例进行了验证。结果表明,送受端故障引发系统失稳的可能模式相似,实际系统中受端故障对稳定性的影响更严重,可通过采取控制措施保证系统稳定运行。研究结论可以为电力系统实际运行提供参考。As characteristic of ＂strong DC and weak AC＂ of the power grid is continually strengthened, multiple HVDC commutation failure and power drop caused by sending- and receiving-side contingencies will both result in sending-side system instability. In this paper, DC response characteristics, possible system instability modes and severity after sending- and receiving-side contingencies are compared and analyzed, several countermeasures are given, and results are verified with ＂North China-Central China-East China＂ power grid case system. Results show that possible system instability modes of sendingand receiving-side contingencies are similar, impact of receiving-side contingencies on stability is more severe in practical power systems, and the system can be kept stable with countermeasures. The study results can provide references to practical power systems.

关 键 词：送受端故障 直流换相失败 直流功率瞬降 失稳模式 控制措施 

分 类 号：TM71[电气工程—电力系统及自动化]