影响特高压大电源外送系统送电能力的敏感因素  

Sensitive factors affecting transmission capacity of large-scale UHV power supply system

作　　者：覃波[1] 李兴源[1] 胡楠[1] 李宽[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《电力自动化设备》2014年第10期150-157,共8页Electric Power Automation Equipment

基　　金：国家高技术研究发展计划(863计划)资助项目(2011-AA05A119);国家电网公司大电网重大专项资助项目课题(SGCC-MPLG001(003-027)-2012)~~

摘　　要：推导了考虑送端机组特性的单机带负荷系统的等效阻尼系数公式并对其进行分析。分析结果表明,系统的阻尼特性主要受相对转子角和电气距离影响,等效阻尼系数与两者均成反比。利用PSASP软件对锡盟特高压外送大电源系统和锦界—府谷超高压大电源外送系统进行仿真验证,仿真结果验证了理论推导的正确性,表明在N-1或者N-2运行状态下,大电源外送系统比普通电源外送系统更易出现动态失稳。根据理论分析和仿真结果,给出了大电源外送系统的运行建议。The formula of equivalent damping coefficient considering the characteristics of sending-terminal is deduced and analyzed for single-machine system with load. The analytical results show that,the relative rotor degree and the electrical distance are the main factors affecting the damping characteristics of system and the equivalent damping coefficient is inversely proportional to both of them. Simulations are carried out in PSASP for Ximeng and Jinjie- Fugu large- scale UHV power supply systems, which, verifying the correctness of theoretical analysis,show that,the large-scale power supply system under N-1 or N-2operating state grows the dynamic unstability much easier than the normal power supply system. Suggestions for the operation of large-scale power supply system are given according to the theoretical analysis and simulative results.

关 键 词：特高压输电 大电源系统 低频振荡 阻尼 电气距离 送电功率 敏感因素 稳定性 

分 类 号：TM72[电气工程—电力系统及自动化]