基于交替方向乘子法的电网电压相量轨迹拟合及暂态稳定评估指标构建  

Power Grid Voltage Phasor Trajectory Fitting and Transient Stability Evaluation Index Construction Based on Alternate Direction Multiplier Method

作　　者：马海滨 刘道伟 赵高尚 杨红英 苑菲 郜燊 MA Haibin;LIU Daowei;ZHAO Gaoshang;YANG Hongying;YUAN Fei;GAO Shen(School of Electrical Engineering,Northeast Electric Power University,Jilin 132012,Jilin Province,China;China Electric Power Research Institute,Beijing 100192,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100192

出　　处：《电力建设》2023年第12期136-147,共12页Electric Power Construction

基　　金：国家重点研发计划项目(2018YFB0904500)。

摘　　要：电力系统暂态稳定态势量化评估是大电网在线安全防御的主要部分,而如何针对电网动态轨迹信息构建暂态稳定预估指标是关键。电网电压相量轨迹信息蕴含更丰富的稳定行为特征。文章以双机系统为例,首先从轨迹几何角度分析了发电机暂态能量转化与电压相轨迹之间演变规律;继而在扩展等面积准则(extended equal area criteria,EEAC)的基础上推理验证了其在多机系统下的普适性;为实现暂态稳定快速预估,提出了一种基于交替方向乘子法的轨迹拟合方法,该方法在拟合精度与速度上具有明显优势;在此基础上,以电压相量轨迹拟合曲线的弧长距离为数据支撑,构建了一种暂态稳定快速预估指标。最后,以新英格兰10机39节点系统与某省级电网的仿真数据为例,验证了该方法评估有效性。The quantitative assessment of the transient stability of a power system constitutes the basis of the online security defense of a large power grid,and the construction of a transient stability prediction index based on the dynamic trajectory information of the power grid is key.The grid voltage phasor trajectory information contains richer stable behavior characteristics.In this study,using a dual-machine system as an example,the evolution law between the transient energy conversion of the generator and the voltage phase trajectory is first analyzed from the perspective of trajectory geometry.The reasoning is based on the EEAC.Thus,the universality of the multi-machine system is verified.To realize the fast prediction of transient stability,a trajectory fitting method based on the alternating direction multiplier method is proposed,which has obvious advantages in fitting accuracy and speed.Based on the arc length distance of the voltage phasor trajectory fitting curve as the data support,a fast prediction index of transient stability is constructed.Finally,the evaluation accuracy of the proposed method is verified using the simulation data of a 10-machine,39-node system in New England and a provincial power grid as examples.

关 键 词：电压相量轨迹 轨迹拟合 暂态稳定 评估指标 

分 类 号：TM712[电气工程—电力系统及自动化]