复转矩系数法的一种改进应用方法  

An Improved Application Method of Complex Torque Coefficient Approach

作　　者：付敏[1] 颜世魁 毕妍霜 FU Min;YAN Shi-kui;BI Yan-shuang(School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,哈尔滨150080

出　　处：《哈尔滨理工大学学报》2020年第2期96-104,共9页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(51407049)。

摘　　要：为提高电力系统次同步稳定性分析的效率,提出一种基于复转矩系数法的快速分析方法。考虑到工程实际中缺乏机械阻尼数据,采用了只考虑电气阻尼的稳定判据。利用PSCAD/EMTDC软件搭建了IEEE第一标准模型,并基于该系统分析了传统复转矩系数法及其早期优化方法的特点,进而提出将频率扫描法与测试信号法相结合的改进分析方法。改变IEEE第一标准型的串补线路参数,并应用快速分析法对不同稳定性的系统模型分别进行了次同步稳定性分析,最后结合时域仿真验证了分析结果的有效性。通过实验验证,该方法在系统次同步稳定性分析时,相比复转矩系数法更具时效性。In order to improve the efficiency of analysis for subsynchronous stability of power systems,a quick analysis method based on the complex torque coefficient approach was proposed.With the lack of mechanical damping data in engineering practice,this paper just adopted the stability criterion of electric damping.The IEEE first benchmark model was built by PSCAD/EMTDC software,and the author analyzed characteristics of the traditional complex torque coefficient approach and its early optimization method on the basis of the model.And then an improved analysis method combining the frequency scanning method with test signal method was proposed.After changing the parameters of the IEEE first standard model,the author analyzed the subsynchronous stability of the systems featuring different stability respectively with the quick analysis method.Finally,the author verified the analysis results in combination with time-domain simulation.Through experiments,it is shown that the quick analysis method is more timely than the complex torque coefficient approach in analysis for subsynchronous stability.

关 键 词：次同步振荡 复转矩系数法 测试信号法 频率扫描法 

分 类 号：TM712[电气工程—电力系统及自动化]