Dynamic performance optimization of controllable source rectification circuit for marine electromagnetic transmitter
The marine electromagnetic transmitter generates inrush voltage at the bus when operating in nonideal condition,which damages the switching tubes and filtering capacitors in serious cases,for which a hybrid control strategy was proposed. Firstly,the dynamic performance of the controllable source recti-fier circuit of marine electromagnetic transmitter was analyzed based on the feedforward decoupling control strategy in dq coordinate system,and secondly,it was proved theoretically that the load perturbation and the reactive current iq≠0 affect the dynamic performance of the control system,and then an improved q-axis hybrid control method was proposed by introducing the idea of transient direct current in the decou-pling control of the dq current,and the introduction of the load current feedforward and the reactive cur-rent iq≠0 link,which improves the response speed of the d-axis current id and enhances the dynamic performance of the control system. Finally,the comparison of experimental results shows that the hybrid control method minimizes the overshooting difference of the DC-side voltage in three cases,namely,sud-den change of load,sudden change of DC-side voltage given value,and voltage dips of the shipboard diesel generator,and reduces about 65％ compared with the longest adjustment time.
marine electromagnetic transmittercontrolled source rectification circuitdynamic performancemixed controlimproved q-axistransient direct current
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