基于短时电压相量轨迹的同调机群快速预估方法  

A Fast Prediction Method for Coherent Generators Based on Short-time Voltage Phase Trajectories

作　　者：俞嘉晨 李宗翰 刘道伟 夏德明 安军[1] 王克非 杨红英 刘洋 赵高尚 YU Jiachen;LI Zonghan;LIU Daowei;XIA Deming;AN Jun;WANG Kefei;YANG Hongying;LIU Yang;ZHAO Gaoshang(School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,Jilin Province,China;China Electric Power Research Institute,Haidian District,Beijing 100192,China;Northeast Electric Power Dispatching Center,Shenyang 110180,Liaoning Province,China)

机构地区：[1]东北电力大学电气工程学院,吉林省吉林市132012 [2]中国电力科学研究院有限公司,北京市海淀区100192 [3]东北电力调度通信中心,辽宁省沈阳市110180

出　　处：《中国电机工程学报》2021年第8期2705-2715,共11页Proceedings of the CSEE

基　　金：国家电网公司东北分部科技项目(XTB11201705943)。

摘　　要：利用广域量测信息提出一种基于短时电压相量轨迹的同调机群快速预估方法。首先,针对两机失步振荡模型,分析节点电压相量轨迹的几何特征,提取轨迹分类特性,据此特性提出同调机群辨识方法;其次,基于电压相量轨迹的变化趋势预估机组同调性,并利用扩展等面积法则(extended equal area criteria,EEAC)进一步验证分群结果;最后,为应对失步振荡初期机组同调关系尚不明显的问题,提出基于滑动时窗的同调机群预估方案,通过多次分群和验证的方式,实现对机组同调性的持续监测和实时校核。IEEE-9、IEEE-39和IEEE-118节点系统算例验证了方法有效性。Based on the wide area measurement information,a fast prediction method for coherent generators based on short-time voltage phase trajectories was proposed.Firstly,based on double machine oscillation model,the geometric characteristics of bus voltage phase trajectories were analyzed,and an identification method for coherent generators was proposed.Secondly,based on the variation trend of voltage phase trajectory,the coherency of the generator groups was identified,and the extended equal area criterion(EEAC)was used to further estimate the transient stability margin,which can verify the identification results.Finally,in order to deal with the problem that the generator coherency is not obvious in the initial stage of the out-of-step oscillation,a prediction scheme of coherent generators based on sliding time window was proposed.Continuous monitoring and real-time checking of the generator coherency were realized by multiple clustering and checking.The proposed method was validated with the IEEE-9,IEEE-39 and IEEE-118 bus system.

关 键 词：同调机群 电压相量轨迹 扩展等面积法则 滑动时窗 

分 类 号：TM71[电气工程—电力系统及自动化]