Abstract：A synchronous generator with 4-wire rectifier load operates in an asymmetric mode all the time. In order to perform the analytical solution of performance, the d-and q-axis variables of generator are decomposed into low-and high-frequency components and treated separately. The effects of the rotor resistances on high-frequency currents and the damper windings on low-frequency components are neglected. The equivalent circuit model of synchronous generator with the d-axis sub-transient reactance equal to the q-axis one is developed. The small-signal model of equivalent generator is obtained with linearizing method at the steady-state operation point. The Park's equations, phasor diagram and calculation methods of steady-state variables of equivalent generator are also presented. The developed equivalent circuit model is validated against a generator-rectifier hardware system via experiment and against the detailed model via simulation in PSCAD/EMTDC environment, which proves the correctness of small-signal model too. The circuit model and small-signal model can be respectively used for performance analysis and stability assessment with small disturbance for such systems.
魏克银, 刘德志, 欧阳斌, 林朝阳, 翟小飞, 晏明. 带四线制整流桥负载同步发电机的等效电路模型与小信号模型[J]. 电工技术学报, 2010, 25(5): 48-53.
Wei Keyin, Liu Dezhi, Ouyang Bin, Lin Zhaoyang, Zhai Xiaofei, Yan Ming. Equivalent Circuit Model and Small-Signal Model of Synchronous Generator With 4-Wire Rectifier Load. Transactions of China Electrotechnical Society, 2010, 25(5): 48-53.
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