基于WAMS动态轨迹的电力系统功角失稳判据  

Power System Transient Stability Assessment Based on WAMS Dynamic Trajectories

作　　者：秦晓辉[1] 毕天姝[2] 杨奇逊[2] 马世英[1] 

机构地区：[1]中国电力科学研究院,北京市100192 [2]华北电力大学电力系统保护与动态安全监控教育部重点实验室,北京市102206

出　　处：《电力系统自动化》2008年第23期18-22,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50607005);新世纪优秀人才支持计划资助项目(NCET-05-0216);长江学者和创新团队发展计划资助项目(IRT0515);高等学校学科创新引智计划资助项目(B08013)~~

摘　　要：分析了广域测量系统(WAMS)实时动态轨迹应用扩展等面积法则(EEAC)方法时所遇到的一些问题;在选取合适观察断面的同时,提出了一种通过构造综合功角来进行分群的新方法。该方法计入了功角曲线的历史信息和未来走势信息,在一定程度上有助于快速准确分群。还根据P-δ轨迹穿越动态鞍点(DSP)时的斜率和功角,提出了一种综合判据以判别当轨迹遇到DSP时是否会真正失稳。仿真结果验证了该判据的有效性,它可以在系统的失稳特征尚不明显时,就及时判别出系统的稳定性,以便于尽早采取解列等控制措施。Some technical issues in the application of EEAC are discussed. A novel integrated rotor angle criterion, which includes both historical and future information of rotor angle curves, is proposed to identify the true critical cluster. Additionally, a composite criterion using the slope and angle of dynamic saddle point （DSP） is proposed to judge whether the DSP is the true DSP resulting in losing stability. Finally, the flowchart of transient stability assessment criterion is given. The simulation results demonstrate that the proposed method works well. It can assess transient instability even when the characteristic of instability is not obvious enough to take measures such as splitting as soon as possible.

关 键 词：失稳判据 广域测量系统 EEAC 动态轨迹 暂态稳定 电力系统 

分 类 号：TM712[电气工程—电力系统及自动化]