Fundamentals of parameter estimation of synchronous generator (SG) have already been presented in different standards such as IEEE Std. 115. The first proposed methods require short circuit tests and/or some tests for which the synchronous generator should be out of service. In recent reports, however, to avoid the shortcomings of former methods, partial load rejection tests on d_qd- q axes have been recommended to estimate the electrical parameters of SG such as different reactances and time constants. In this paper, it is first shown that the standard well-known methods are valid when there is no saturation effect. Therefore, a new method is proposed to improve SG parameters estimation taking into account the saturation effect. The proposed method uses saturation curve parameters, rotor angle, and analytical equations of the SG alongside the load rejection tests results. To show the accuracy and precision of the proposed method, it is applied to experimental data of an 80燤VA gas turbine unit, and the results are discussed.

中文翻译：

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使用$d-q$轴测试改进同步发电机参数估计并考虑饱和效应


同步发电机（SG）参数估计的基础知识已经在不同的标准中提出，例如 IEEE Std. 115. 第一种提出的方​​法需要进行短路测试和/或一些同步发电机应停止运行的测试。然而，在最近的报告中，为了避免以前方法的缺点，建议在 d_qd-q 轴上进行部分负载抑制测试来估计 SG 的电气参数，例如不同的电抗和时间常数。本文首先证明了标准众所周知的方法在不存在饱和效应的情况下是有效的。因此，提出了一种考虑饱和效应的新方法来改进SG参数估计。所提出的方法使用饱和曲线参数、转子角度和 SG 的分析方程以及甩负载测试结果。为了验证该方法的准确性和精密度，将其应用于80燤VA燃气轮机机组的实验数据，并对结果进行讨论。