考虑d轴抛载试验中测量噪声的同步发电机d轴参数估计

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.