摘要
提出了一种在d轴抛载试验条件下估计同步发电机d轴参数的新方法。首先,利用q轴电压、励磁电流以及它们的数值积分,构建线性回归方程。其次,利用辅助变量法求解带有测量噪声的回归方程的系数。最后,根据回归系数计算d轴参数。算例的测试结果表明,所提方法比现有的图形法和数值优化法有更好的估计性能。
A novel method for estimating d-axis parameters of synchronous generators under d-axis load rejection test is presented.Firstly,new linear regression equations are constructed with q-axis voltage,excitation current and their numerical integrations.Secondly,coefficients of the regression equations are solved with measurement noises by an instrumental variable approach.Finally,the d-axis parameters are calculated from the estimated regression coefficients.The simulation results on a test case show that the proposed method has a better performance than the traditional response curve method or optimization modeling method.
出处
《电力系统自动化》
EI
CSCD
北大核心
2011年第14期74-79,共6页
Automation of Electric Power Systems
基金
输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512710201)
关键词
抛载试验
参数估计
同步发电机
辅助变量法
load rejection test
parameter estimation
synchronous generator
instrumental variable method
