基于典型故障集的暂态功角稳定近似判别方法  

Approximately evaluating power system transient angle stability based on typical failure set

作　　者：刘静琨[1] 李勇[2] 张宁[1] 刘楠[3] 陈国强[3] 

机构地区：[1]电力系统国家重点实验室,清华大学电机系,北京100084 [2]国网北京经济技术研究院,北京102209 [3]国家电网公司,北京100031

出　　处：《电力系统保护与控制》2014年第14期1-7,共7页Power System Protection and Control

基　　金：国家电网公司大电网重大专项资助项目课题(SGCC-MPLG017-2012)

摘　　要：为适应特高压电网安全风险的新特征,需要研究考虑系统暂态功角稳定的风险评估评价方法。现有电力系统暂态功角稳定性判断方法计算量很大,无法满足特高压电网风险评估的计算要求。研究了影响系统故障后暂态功角稳定的因素,基于EEAC法推导了这些因素对于系统临界稳定性的灵敏度,进而设计了在已知典型故障临界稳定信息条件下近似判断边界条件变化后近似场景下暂态功角稳定性的方法。最后设计了考虑电力系统暂态功角稳定的风险评估流程,为特高压电网风险评估提供了新的思路。The safety feature of the ultra-high voltage power grid brings the needs of the risk assessment method that is able to consider the transient angle stability. The existing transient angle stability evaluation methods employ large amount of calculation and thus can not meet the requirements of the risk assessment of the ultra-high voltage power grid. This paper studies the factors that influence the transient angle stability after system fault, and analytically derives the sensitivity of these factors to system critical stability based on Extended Equal-Area Criterion （EEAC） method. The method of approximately evaluating transient angle stability based on typical failure set after the approximately judging boundary condition changes is then proposed. Finally, the framework of power system risk assessment method is carried out considering transient angle stability. It provides new ideas to the risk assessment method of ultra-high voltage power grid.

关 键 词：特高压电网 EEAC法 暂态功角稳定 灵敏度 风险评估 

分 类 号：TM712[电气工程—电力系统及自动化]