In order to achieve the lightweight design goal of switched reluctance wind turbine and improve the design efficiency, an integrated parameter design method of switched reluctance generator-gear transmission system is proposed in this paper. This method takes structural parameters of the switched reluctance generator and gear transmission system as design variables, and takes the system minimum weight as optimization objective. Based on the finite element method, the flux linkage and torque characteristic matrix of switched reluctance generator are calculated. On this basis, the non-linear dynamic simulation model of switched reluctance generator is established to calculate the dynamic torque of switched reluctance generator. The switching angle is optimized by simulated annealing algorithm to obtain the maximum generator torque. Finally, The feasible parameter solution is iteratively calculated by downhill simplex optimization method, until the weight of the generator-gear system converges to minimum. The internal nested optimization is included in the optimization process, minimizing system weight to the maximum extent. The above design process is automatically operated through script to improve design efficiency, realizing the parameter design of switched reluctance generator-gear system. Based on this method, 8 MW SRG wind turbine is designed and compared with the present permanent magnet synchronous wind turbine with the same generation capacity, from the aspects of weight and torque performance. The conclusion is obtained as following: the switched reluctance generator-gear transmission system is designed by the proposed method. The generator has good torque performance, and the system weight is effectively reduced; Moreover, the design efficiency is greatly improved.
Key words
wind turbines /
lightweight /
integrated design approach /
parameter optimization /
switched reluctance generator /
design efficiency
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