This article presents an analysis of grid connection of an excited induction generator, where an inrush current is significantly reduced and voltage drop in the local grid is eliminated. In the proposed method, generator connection to the grid is done at the moment when the generator voltage vector equals the grid voltage vector, but the generator frequency differs from the grid frequency. Excitation of the induction generator is provided by a power electronic converter, which is rated only on the rated reactive power of the generator. Moreover, when the generator is connected to the grid, the converter satisfies reactive power demand of an induction generator, according to the requirements from the distribution system operator. The simulation and laboratory tests were conducted with a 7.5 kW induction generator.

中文翻译：

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电力电子变换器激励的笼式感应发电机的异步电网连接

本文介绍了一个励磁感应发电机的电网连接分析，其中励磁电流大大降低，并且本地电网中的电压降得以消除。在所提出的方法中，当发电机电压矢量等于电网电压矢量但发电机频率与电网频率不同时，即完成发电机与电网的连接。感应电子发电机的励磁由功率电子转换器提供，该功率电子转换器仅根据发电机的额定无功功率进行额定。而且，当发电机连接到电网时，根据配电系统运营商的要求，转换器满足感应发电机的无功功率需求。模拟和实验室测试是使用7.5 kW感应发电机进行的。