This article proposes a two-degrees-of-freedom (TDOF) control with torque current compensating method (TCCM) to enhance the dynamic performance of permanent magnet generator (PMG) system when load changes. First, the mathematic model of PMG system with active front-end rectifier is introduced. Based on the system model, the proportional-integral controller of current loop is designed, and the TDOF controller designed with internal model control principle is derived for voltage loop control. There are two sets of parameters in the TDOF controller, one is used to regulate the system tracking performance when the command dc-link voltage changes, and the other is used to regulate the system antidisturbance capability when the electrical load changes. Second, the TCCM is proposed to further improve the system dynamic performance. The variation of torque current is applied to revise the command dc-link voltage, namely, the command dc-link voltage increases under loading occasion and decreases when unload occurs. The TCCM needs no additional hardware and is simple to implement. Simulation and experimental results verify the effectiveness of the proposed method.

中文翻译：

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二自由度控制电流补偿法改善永磁发电机系统动态性能


本文提出了一种带有扭矩电流补偿方法（TCCM）的二自由度（TDOF）控制，以增强永磁发电机（PMG）系统在负载变化时的动态性能。首先介绍了带有源前端整流器的PMG系统的数学模型。基于系统模型，设计了电流环比例积分控制器，并推导了采用内模控制原理设计的电压环控制TDOF控制器。 TDOF控制器中有两组参数，一组用于调节指令直流母线电压变化时系统的跟踪性能，另一组用于调节电力负载变化时系统的抗干扰能力。其次，提出TCCM以进一步提高系统动态性能。扭矩电流的变化用于修正指令直流母线电压，即指令直流母线电压在加载时增大，在卸载时减小。 TCCM不需要额外的硬件并且易于实现。仿真和实验结果验证了该方法的有效性。