Nonlinear Speed Control for a Permanent Magnet Synchronous Generator and the Boost-Chopper Converter
Geng Qiang1, Xia Changliang1, 2, Wang Zhiqiang2, Shi Tingna2
1.Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy Tianjin Polytechnic University Tianjin 300387 China 2. Tianjin University Tianjin 300072 China
Abstract：A diode bridge rectifier followed by a boost chopper circuit is a common topology of the generator side converter for a direct driven permanent magnet synchronous generator (PMSG)-based wind energy conversion system(WECS). Owing to its strong nonlinearity, it is difficult for the system to maintain good dynamic performance within a normal operating range under the ordinary proportional-integral(PI) controller. According to its nonlinear characteristics, the piecewise nonlinear mathematical model for the whole system including the surface permanent magnet synchronous generator(SPMSG) and the generator side converter is built. Then the nonlinear mathematical model is transformed into a linear one by the input-output feedback linearization(IOFL) method. In addition, a speed controller is designed based on the optimal control theory. The proposed strategy has the advantages of a simple conversion process, a relatively mature parameter tuning method and unchanged parameters for the linear optimal controller within different intervals. Experimental results are presented with a 3kVA prototype, verifying the effectiveness and practicability of the proposed strategy.
耿强, 夏长亮, 王志强, 史婷娜. 永磁同步发电机与Boost斩波型变换器非线性速度控制[J]. 电工技术学报, 2012, 27(3): 35-43.
Geng Qiang, Xia Changliang, Wang Zhiqiang, Shi Tingna. Nonlinear Speed Control for a Permanent Magnet Synchronous Generator and the Boost-Chopper Converter. Transactions of China Electrotechnical Society, 2012, 27(3): 35-43.
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2012, Vol. 27 
