基于I-ω响应特征的电力系统暂态稳定切机控制方法  

Power System Transient Stability Generator Tripping Control Method Based on I-ωResponse Characteristics

作　　者：李守超 刘铖 张宇驰 王湘东 徐瑞[1] 李文彪[2] LI Shouchao;LIU Cheng;ZHANG Yuchi;WANG Xiangdong;XU Rui;LI Wenbiao(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education(Northeast Electric Power University),Jilin Jilin 132012;State Grid Shanxi Electric Power Company,Shanxi Taiyuan 030021)

机构地区：[1]现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林吉林132012 [2]国网山西省电力公司,山西太原030021

出　　处：《东北电力大学学报》2024年第6期91-100,共10页Journal of Northeast Electric Power University

基　　金：吉林省自然科学基金资助项目(20220101252JC)。

摘　　要：为满足新型电力系统对暂态稳定紧急控制实时性的需求,提出一种基于发电机电流与角频率响应特征的电力系统暂态稳定切机控制方法。首先,绘制出系统稳定和系统失稳时电流与角频率的关系曲线,研究电流和角频率与暂态稳定性间的关系,从中提取出功角稳定和功角失稳关键特征,构建基于I-ω响应特征的暂态功角稳定性判据;其次,研究I-ω关系曲线的斜率特性,探究不同比例切机控制下关系曲线斜率与暂态稳定性间的关系。基于发电机转子运动方程推导出关系曲线斜率与切机控制量的关系,得到基于关系曲线斜率的紧急切机控制量计算方法;然后,以功角失稳判据作为紧急控制的启动判据,定义考虑发电机功角和转子蕴含动能影响的切机指标,实现切机控制地点的快速选择,并给出合理的切机控制量分配方法;最后,在经典二阶单机无穷大系统和接入风机的新英格兰10机39节点系统中,对所提方法进行仿真计算,验证所提方法的有效性。In order to meet the real-time requirements of the new power system for transient stability emergency control,a transient stability generator tripping control method based on generator current and angular frequency response characteristics is proposed.Firstly,the relationship curves between current and angular frequency are drawn when the system is stable and unstable,and the relationship between current and angular frequency and transient stability is studied.The key characteristics of power angle stability and power angle instability are extracted,and the transient power angle stability criterion based on I-ωresponse characteristics is constructed.Secondly,the slope characteristics of the I-ωrelationship curve are studied,and the relationship between the slope of the relationship curve and the transient stability under different proportion of generator tripping control is explored.Based on the generator rotor motion equation,the relationship between the slope of the relationship curve and the amount of generator tripping control is derived,and a calculation method of emergency generator tripping control based on the slope of the relationship curve is proposed.After that,the power angle instability criterion is used as the starting criterion of emergency control,and the generator tripping index considering the influence of generator power angle and kinetic energy contained in the rotor is defined.The fast selection of the generator tripping control location is realized,and a reasonable allocation method of generator tripping control quantity is given.Finally,the proposed method is simulated in the classical second-order one machine infinite bus system and the New England 10-machine 39-bus system with wind turbines,and the effectiveness of the proposed method is verified.

关 键 词：电力系统 响应信息 暂态稳定 紧急控制 切机控制量 

分 类 号：TM712[电气工程—电力系统及自动化]