双轴励磁同步电机同步电抗随运行工况的变化规律

doi:10.19595/j.cnki.1000-6753.tces.181787

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Abstract The high stability of dual excited synchronous generator (DESG) is of great importance for building high reliability of power grid and guaranteeing the power supply of crucial region. However, DESG with a set of two-phase field windings is different from the traditional synchronous generator (TSG) on the magnetic circuit structure and synchronous reactance. In this paper, the time-stepping finite element model of DESG is established. The saturation characteristics and magnetic distributions of DESG are compared with those of TSG. Then, the synchronous reactance of DESG is calculated by two methods. The differences of synchronous reactance of DESG with single and dual-excitation mode are studied under different operating conditions. The variation law of synchronous reactance along with the power angle is studied by taking the axis of field winding and the position of the synthetic excitation magnetomotive force (MMF) as the direct axis. The simulation results are verified by the experiments of model machine. It is shown that the synchronous reactance of DESG is smaller than that of TSG. The different direct axis positions will result in different variation law of synchronous reactance along with the power angle.

Key words： Dual excited synchronous generator (DESG) excitation mode synchronous reactance non-linear

Received: 19 November 2018 Published: 17 January 2020

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TM302

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	Xu Guorui
	Hu Yiping
	Li Weili
	Luo Yingli
	Liu Xiaofang

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Xu Guorui,Hu Yiping,Li Weili等. The Variation Law of Synchronous Reactance along with the Operation Condition of Dual-Excited Synchronous Generator[J]. Transactions of China Electrotechnical Society, 2020, 35(2): 236-245.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181787 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I2/236

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