利用有效发电机阻抗进行强迫振荡源定位
Using Effective Generator Impedance for Forced Oscillation Source Location
AI总结：
本文提出一种基于发电机终端电压和电流波动响应的系统方法，用于定位电力系统中强迫低频振荡源，通过有效 admittance 矩阵和有效电流源特性，实现了无强假设建模的鲁棒性验证。
摘要：
在电力系统中定位强迫低频振荡源是一个重要问题。许多提出的方法显示出实际实用性，但许多方法依赖于强建模假设，在某些情况下性能不佳，原因尚不明确。本文提出了一种系统方法，通过考虑发电机对终端电压和电流波动的响应来定位振荡源。证明发电机可表示为低频振荡的有效 admittance 矩阵，并为各种发电机模型推导出显式形式。进一步证明，源发电机除了有效 admittance 外，还具有有效电流源特性，从而自然区分源发电机和非源发电机。给出了基于该表示的源检测程序的详细描述，并通过推荐的测试床（如 WECC 179 节点系统）的模拟验证了方法的有效性。该方法无需强建模假设，并在存在测量噪声和发电机参数不确定性的条件下表现出鲁棒性。
英文摘要：
Locating the sources of forced low-frequency oscillations in power systems is an important problem. A number of proposed methods demonstrate their practical usefulness, but many of them rely on strong modeling assumptions and provide poor performance in certain cases for reasons still not well understood. This paper proposes a systematic method for locating the source of a forced oscillation by considering a generator's response to fluctuations of its terminal voltages and currents. It is shown that a generator can be represented as an effective admittance matrix with respect to low-frequency oscillations, and an explicit form for this matrix, for various generator models, is derived. Furthermore, it is shown that a source generator, in addition to its effective admittance, is characterized by the presence of an effective current source thus giving a natural qualitative distinction between source and nonsource generators. Detailed descriptions are given of a source detection procedure based on this developed representation, and the method's effectiveness is confirmed by simulations on the recommended testbeds (eg. WECC 179-bus system). This method is free of strong modeling assumptions and is also shown to be robust in the presence of measurement noise and generator parameter uncertainty.
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