Abstract

The load angle of a synchronous generator connected to a power grid has an eigenfrequency that depends on the operating conditions. The existence of an eigenfrequency can make the generator sensitive to electrical and mechanical disturbances and motivates the use of damper windings and power stabilizing systems. Another reason for keeping load angle oscillations small is that they increase the eddy current losses in the stator core and clamping structure due to axial leakage flux. This is shown with transient finite element analyses and can be explained by a loss model derived from a phasor model of the eddy current loss density.

中文翻译：

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稳态和负载角振荡下同步发电机轴向磁通引起的定子涡流损耗模型

摘要

连接到电网的同步发电机的负载角具有取决于运行条件的特征频率。本征频率的存在会使发电机对电气和机械干扰敏感，并促使使用阻尼绕组和功率稳定系统。保持负载角振荡较小的另一个原因是，由于轴向漏磁通，它们会增加定子铁芯和夹紧结构中的涡流损耗。这通过瞬态有限元分析显示，并且可以通过从涡流损耗密度的相量模型导出的损耗模型来解释。