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首页> 外文期刊>IEEE Transactions on Magnetics >A Novel 3-D Concentric-Winding-Type Three-Phase Variable Inductor for Reactive Power Compensation in Electric Power Systems
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A Novel 3-D Concentric-Winding-Type Three-Phase Variable Inductor for Reactive Power Compensation in Electric Power Systems

机译：电力系统无功补偿的新型3-D同心绕线型三相可变电感器

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摘要

A variable inductor consists of a magnetic core, primary dc windings, and secondary ac windings. The effective inductance of the secondary ac winding can be controlled by the primary dc current because of its nonlinear magnetic characteristic. Hence, variable inductors can be applied as a reactive power compensator for voltage stabilization in electric power systems, and have desirable features such as a simple and robust structure, low cost, and high reliability. In a previous paper, a concentric-winding-type three-phase variable inductor with a 2-D structure has been proposed. It was demonstrated that the 2-D variable inductor has good controllability and a low distortion current. To further increase productivity and reduce costs, this paper presents a novel concentric-winding-type three-phase variable inductor with a 3-D structure. It is demonstrated that the leakage flux of the proposed 3-D variable inductor is reduced by more than 30%. Furthermore, a 6.6 kV-100 kVA 3-D variable inductor is designed and compared to its 2-D counterpart. It is proved that eddy current loss, which is induced within an oil-immersed self-cooled tank because of leakage flux from the variable inductor, can be reduced to one-third of that of the 2-D variable inductor.
机译：可变电感器由磁芯，初级直流绕组和次级交流绕组组成。由于其非线性磁特性，次级交流绕组的有效电感可以由初级直流电流控制。因此，可变电感器可以用作电力系统中的电压稳定的无功功率补偿器，并且具有期望的特征，例如简单且坚固的结构，低成本和高可靠性。在先前的论文中，已经提出了具有2-D结构的同心绕组型三相可变电感器。结果表明，二维可变电感器具有良好的可控性和低失真电流。为了进一步提高生产率并降低成本，本文提出了一种新型的具有3-D结构的同心绕组型三相可变电感器。结果表明，提出的3-D可变电感器的漏磁通减少了30％以上。此外，设计了6.6 kV-100 kVA的3-D可变电感器，并将其与2-D等效电感器进行了比较。事实证明，由于来自可变电感器的漏磁通，在油浸式自冷罐中引起的涡流损耗可以降低到2-D可变电感器的涡流损耗的三分之一。

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