永磁同步风力发电机电流控制策略比较

Comparison of Current Control Strategies for Permanent Magnet Synchronous Wind Generator

永磁同步风力发电机的功率因数、铜耗、端电压比在不同电流控制策略下会有所不同。为深入研究永磁同步风力发电机在不同电流控制策略下的工作特性,在介绍isd=0、最大转矩电流比、单位功率因数和恒磁链四种电流控制策略的基础上,分别计算了这四种电流控制策略下样机的功率因数等工作特性,计算结果表明最大转矩电流比控制时电机铜耗最低,单位功率因数控制时电机功率因数最高,恒磁链控制时铜耗较低,功率因数较高。最后根据样机参数,对四种电流控制策略下直驱式永磁同步风电系统进行仿真,仿真结果验证了计算结果的正确性,并为永磁同步风力发电机的控制提供了参考。

The power factor, copper loss and terminal voltage ratio of permanent magnet synchronous wind generators （PMSWG） varied with current control strategies. In order to study the operation performance of PMSWGs controlled under different current strategies, the operation characteristic of a prototype were respectively calculated and analyzed based on the introduction of the four current control strategies as follows：isd = 0 control;maximum torque current ratio control;unity power factor control and constant flux control. The calculation results show that the maximum torque current ratio control reached the minimum copper loss, the unity power factor control achieved the highest power factor and the copper loss of the con- stant flux control was relatively low while the power factor was relatively high. According to the prototype parameters, the simulation of direct driven wind generation system under the four current control strategies was carried out. The simulation results verify the validity of the calculation results, and a reference to the control of PMSWG was provided.