基于交替迭代优化的同步调相机电气参数分步辨识方法  

A step-by-step identification method of synchronous condenser electrical parameters based on alternative iterative optimization

作　　者：王继豪 王安东 孙福春 郑竞宏[2] 曹志伟 朱文兵 Wang Jihao;Wang Andong;Sun Fuchun;Zheng Jinghong;Cao Zhiwei;Zhu Wenbing(Electric Power Research Institute of State Grid Shandong Electric Power Company,Ji’nan 250003,China.;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]国网山东省电力公司电力科学研究院,济南250003 [2]清华大学电机工程与应用电子技术系,北京100084

出　　处：《电测与仪表》2022年第1期99-105,共7页Electrical Measurement & Instrumentation

基　　金：国家电网公司科技资助项目(52062616004A)。

摘　　要：300 Mvar快速动态响应同步调相机广泛应用于特高压直流输电。为准确辨识调相机器模型参数,提出一种基于交替迭代优化的电气参数分步联合辨识方法。采用考虑饱和特性的六阶实用电机模型,设计了包含励磁阶跃扰动、甩负荷扰动和机端电压扰动的小扰动实验方案;基于交替迭代方向乘子法和轨迹灵敏度分析法,制定了采用三组小扰动实验数据联合辨识、稳态参数和暂态参数分步辨识的策略,并将其应用到伊克昭-沂南直流送电工程中。研究表明,三组实验联合辨识优于单扰动辨识,分步辨识优于一次性辨识所有参数,很好地解决了基于单次扰动实验辨识出的参数无法复现其他工况实验数据的问题,提高了参数辨识结果的适用性和准确性。The 300 Mvar fast dynamic response synchronous condenser is widely used in UHVDC transmission system.In order to identify the model parameters of synchronous condenser,a step-by-step parameters identification method based on alternative iterative optimization is proposed in this paper.A six-order practical motor model considering saturation characteristics is adopted.A small disturbance test scheme including excitation step disturbance,load rejection disturbance and terminal voltage disturbance is designed.Then,based on the ADMM method and trajectory sensitivity analysis method,the steady parameters and transient and sub-transient parameters are identified iteratively using three groups of disturbance data simultaneously.The proposed parameters identification strategy is applied to the ikezhao-yinan UHVDC project successfully.The research shows that the identification result using three groups of tests is better than that using one single test,and the step-by-step identification method is better than that one-time identification of all parameters.It solves the problem that the parameters identified based on the single disturbance test cannot reproduce the other disturbance tests data,and improves the applicability and accuracy of the parameter identification results.

关 键 词：同步调相机 分步联合辨识 交替方向乘子法 轨迹灵敏度 

分 类 号：TM721[电气工程—电力系统及自动化]