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An Isolated Three-Phase Induction Generator System With Dual Stator Winding Sets Under Unbalanced Load Condition

机译:不平衡负载条件下具有双定子绕组组的隔离式三相感应发电机系统

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This paper presents a stand-alone wind-based dual-stator-winding induction generation (DWIG) system under unbalanced load conditions. The DWIG consists of a cage-rotor and a stator with two sets of three-phase windings with the same number of pole-pairs. The first winding is fed by a three-phase STATCOM and is used to excite the machine. The STATCOM main frequency is chosen to be equal to generator load frequency. Since two stator windings share the same working frequency, the output frequency is independent of the generator load power demand, and its prime mover speed. The second stator winding is connected to the load. Assuming a three-phase unbalanced load, the main aim of this paper is to use conventional proportional-integral (PI) controllers for three different control targets. In the first target, the PI controllers are used to regulate the load positive-sequence-voltage while simultaneously removing the load negative-sequence-voltage. In the second and third control targets, the positive-sequence-voltage is regulated while simultaneously removing either the load negative-sequence-current or the load active power double-frequency-component. A separate PI regulator is used to regulate the STATCOM dc-link voltage by obtaining the rotor reference speed. Some simulation and experimental results are presented to prove the validity and effectiveness of the proposed system.
机译:本文提出了一种在不平衡负载条件下基于风的独立双定子绕组感应发电(DWIG)系统。 DWIG由一个笼型转子和一个定子组成,该定子具有两组具有相同极对数量的三相绕组。第一绕组由三相STATCOM馈电,用于激励电机。选择STATCOM主频率等于发电机负载频率。由于两个定子绕组共享相同的工作频率,因此输出频率与发电机负载功率需求及其原动机速度无关。第二定子绕组连接到负载。假设三相不平衡负载,本文的主要目的是针对三个不同的控制目标使用常规的比例积分(PI)控制器。在第一个目标中,PI控制器用于调节负载正序电压,同时消除负载负序电压。在第二和第三控制目标中,调节正序电压,同时消除负载负序电流或负载有功功率双频分量。通过获得转子参考速度,可使用单独的PI调节器来调节STATCOM直流链路电压。给出了一些仿真和实验结果,证明了所提系统的有效性。

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