引用本文:孙昊,王茂海,齐霞.基于PMU实测数据的同步发电机参数在线辨识方法[J].电力系统保护与控制,2014,42(3):31-36.
SUN Hao,WANG Mao-hai,QI Xia.Synchronous generator parameters identification based on PMU data[J].Power System Protection and Control,2014,42(3):31-36
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基于PMU实测数据的同步发电机参数在线辨识方法
孙昊1, 王茂海2, 齐霞3
1.国网新源控股有限公司，北京 100053;2.国家电网华北电力调控分中心，北京 100053;3.冀北电力有限公司电力经济技术研究院，北京 100045
摘要:
由于试验条件与发电机运行的实际工况有较大差异，常规的电机试验难以得到与饱和、涡流等密切相关的发电机动态参数的准确值，满足不了离线和在线安全分析及控制的要求。将PMU上传的定子电压和励磁电压量测作为输入信号、定子电流和励磁电流作为输出信号，基于PMU实测数据和同步发电机派克模型，考虑定子绕组暂态过程，实现了同步发电机原始参数的辨识。电力系统实际算例表明，与设计参数相比，基于该参数辨识结果的仿真曲线与实测发电机动态曲线的拟合程度明显要高，所提方法能够有效提高同步发电机的参数辨识精度。
关键词:  同步发电机  Park模型  参数辨识  相量测量装置
DOI：10.7667/j.issn.1674-3415.2014.03.005
分类号:
基金项目:
Synchronous generator parameters identification based on PMU data
SUN Hao1, WANG Mao-hai2, QI Xia3
1.State Grid Xin Yuan Company Limited, Beijing 100053, China;2.North China Branch of State Grid Power Dispatch & Control Center, Beijing 100053, China;3.Jibei Electric Economic Research Institute, Beijing 100045, China
Abstract:
Since test conditions are quite different from actual working conditions, it’s difficult for conventional test method to identify the exact value of synchronous machine dynamic parameters which are related to saturation and eddy currents. Thus, conventional test method cannot satisfy requirements of offline/online security analysis and control. Based on PMU measurements and taking transient processes of d-axis and q-axis stator windings into account, this paper proposes an online algorithm to estimate synchronous machine parameters in Park model. With stator voltage and field voltage as input signals, stator current and field current as output signals, the proposed algorithm chooses particle swarm algorithm as optimization algorithm. Practical examples show that, compared with the design parameters, the similarity between simulation data derived from identified parameters and measured data is much better. The proposed method can effectively improve the identification accuracy of synchronous machine parameters.
Key words:  synchronous generator  Park model  parameter identification  phasor measurement unit (PMU)
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