基于系统等值和频率扫描的复杂大系统多串补SSR风险快速评估  

Rapid Risk Assessment of SSR Caused by Series Capacitors Compensations in Large Scale Power System Based on System Equivalence and Frequency Scanning

作　　者：穆子龙[1] 张默霓 张金[2] 李兴源[1] 王渝红[1] 杨煜[3] 黎小林[3] 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]四川成都电业局,四川成都610000 [3]中国南方电网有限责任公司电网技术研究中心,广东广州510623

出　　处：《四川大学学报（工程科学版）》2011年第3期155-160,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金重点项目(51037003);国家电网公司和南方电网公司科技项目;四川省科技厅基础应用计划资助项目(2010JY0018)

摘　　要：针对含多个串补的大规模交直流输电系统,为了保障电网安全稳定运行,需要对其发生次同步谐振(SSR)的风险进行快速有效的评估。以2009年南方电网迎峰度夏阶段的实际情况为例,将计及电阻的两点等值法和频率扫描法相结合,实现了对复杂大电网多个串补SSR风险的快速评估,然后针对有发生SSR风险的汽轮机组采用PSCAD/EMTDC程序搭建详细的电磁暂态模型(包括轴系模型),并进行了故障仿真验证。分析结果表明,该快速评估方法效果很好,具有很强的实用性。For large scale AC/DC transmission schemes with multiple series capacitors compensations,how to assess the risk of subsynchronous resonance（SSR） rapidly and efficiently is of great practical significance to ensure that the grid operates safely and stably.Taking the meeting summer peaks in 2009 of China Southern Power Grid as the practical project,by combining a static equivalence method,modified two point loadflow calculation which takes resistance into account,with frequency scanning method,the rapid risk assessment of SSR caused by mutiple series capacitors compensations in large scale power grid was realized.Then by using PSCAD/EMTDC,the detailed electromagnetic transient model（of course including the shaft model） was established to do the fault simulation certification aiming at generating units which have the risk of SSR.The analysis results showed that this rapid assessment approach works well and has strong practicability.

关 键 词：次同步谐振(SSR) 串补 SSR风险快速评估 

分 类 号：TM743[电气工程—电力系统及自动化]