一种开关磁阻发电机的均流控制策略

A kind of current-sharing control strategies for SRG

针对两台或多台开关磁阻发电机并联输出时电流不均衡等问题,开展了开关磁阻发电机系统建模及并联均流控制的研究。对开关磁阻电机数学模型进行了分析,并对比了目前常用的几种并联均流控制方案,提出了将最大电流均流法运用到开关磁阻发电机均流控制系统中。通过Ansoft仿真分析,得到了电机的电流、角度、磁链的二维表;在Matlab/Simulink中应用插值查表法建立了开关磁阻发电机系统的非线性模型,通过仿真验证了该模型的准确性。在两台发电机系统模型中增加了均流外环,进行了闭环仿真实验。研究结果表明,两台发电机在一定转速差的情况下,通过运用最大电流均流法能够实现均流控制,验证了该均流策略的正确性和有效性。

Aiming at the problems of the current inbalance between two or multiple SRG（ stitched reluctance generator）,the systematic model of SRG and current sharing control was researched. After the analysis of the SRG mathematical model and the comparison of some common methods,the maximal current sharing method was proposed to be aoolied to the SRG current sharing control system. The nonlinear model of SRG was established by the interpolation lookup table method based on the two-dimensional table of current、angle and flux from ansoft,the accuracy of the model was verified by the simulation result. A flow equalize cycle was added to the two SRG systematic model,the closedloop simulation was tested. The experimental results show that the systematic model can achieve average-current by using maximal current sharing control while two generator had certain speed difference,proving the correctness and validity of the control strategy.