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机构地区:[1]华中科技大学水电与数字化工程学院,湖北省武汉市430074
出 处:《电网技术》2013年第2期378-384,共7页Power System Technology
基 金:国家自然科学基金(51079057;51039005);高等学校博士学科点专项科研基金资助项目(20100142110012)~~
摘 要:针对同步发电机d、q轴抛载试验的不足,提出了任意工况下一次性抛载试验参数辨识方法。通过分析同步发电机抛载试验动态过程,建立了任意工况下一次性抛载试验d、q轴传递函数模型。考虑到传递函数输入/输出均可测量,通过积分变换将微分方程转化为积分方程,将同步发电机任意工况抛载试验传递函数模型转化为线性回归模型,在此基础上通过分析参数可辨识性和引入多新息最小二乘辨识算法,解决了同步发电机物理参数辨识问题。算例结果验证了该方法的有效性。In allusion to the deficiencies in load rejection tests for d-and q-axis of synchronous generator,a parameter identification method for synchronous generators by once-only load rejection test under arbitrary operating conditions is proposed.By means of analyzing dynamic process during load rejection test for synchronous generator,d-and q-axis transfer function models during once-only load rejection test under arbitrary operating conditions are built.Considering the measurability of the input/output of transfer functions,the differential equations are turned into integral equations by integral transformation,so the transfer function models of synchronous generator during load rejection test under arbitrary operating conditions are turned into linear regression models.On this basis through analyzing identifiability of parameters and leading in multi-innovation least square(MILS) identification algorithm the problem of physical parameter identification of synchronous generator is solved.Simulation results of a salient pole synchronous generator show that the proposed algorithm is effective.
分 类 号:TM733[电气工程—电力系统及自动化]
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