Excitation Regulation Study of Electrical-Excited Wind Turbines
Zhang Ye1, 2, Hu Shuju1, Dong Zhiran3, Zhao Bin1
1. Key Laboratory of Wind Energy Utilization CAS Institute of Electrical Engineering CAS Beijing 100190 China; 2. Graduate University of CAS Beijing 100049 China; 3. Beijing Corona Technology Co. Ltd. Beijing 100083 China
Abstract：Compared with permanent magnet synchronous generator, electrical excited synchronous generator has the advantage of adjustable excitation. This paper presents an excitation control scheme which can regulate the stator voltage under variable speed operation situation. The RMS stator voltage and the rotate speed of the generator are obtained through a software phase-locked loop, and a PI regulator is used to control the stator voltage tracking the speed-votage curve. As the DC voltage is controlled constant in the converter topology, a set of excitation controller based on the chopper circuit is designed. It can meet the demand for automatic de-excitation without extra equipment. The proposed control algorithm and structure was simulated in the Matlab software platform and tested with the 1.5MW synchronous generator. The simulation and experimental results show that the excitation control scheme is simple and reliable, with high rapid response capability and good effect of steady state control.
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2014, Vol. 29 
