Loss Reduction in Gapped-Core-Type Shunt Reactors via Magnetic-Flux-Distribution Improvement

IF 1.6 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Moon-Sik Kang, Yun-Hyun Cho
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Abstract

With the steadily increasing number of systems utilizing ultrahigh-voltage transmission lines, such as 765 kV and 400 kV substations, shunt reactors have come under the spotlight as a viable option to increase the load capacity and reduce losses. However, the cumulative losses during their operational life increase. In this study, we improved the magnetic flux of a yoke and analyzed its effect on loss reduction in the iron core. We applied a magnetic flux control structure that equalized the main and leakage fluxes generated from the main leg of a gapped core-type shunt reactor with the leakage flux generated from the winding. The magnetic flux generated by the yoke and its distribution in the in-plane direction with and without the flux-control plate were analyzed and compared using Maxwell’s three-dimensional finite element method. We evaluated the losses exhibited by two fabricated shunt reactors with a sensor installed on their iron cores to verify the effectiveness of improving the magnetic flux distribution of shunt reactors. The results confirmed that the magnetic flux control plate reduced the iron and winding eddy-current losses in the gapped core-type shunt reactor. Further investigations are required to minimize loss and noise throughout the operational lifespan of these reactors as well as to decrease the size and weight of shunt reactors for different applications.

Abstract Image

通过改善磁通量分布降低间隙铁芯型并联电抗器的损耗
随着使用超高压输电线路(如 765 千伏和 400 千伏变电站)的系统数量稳步增长,并联电抗器作为一种提高负载能力和降低损耗的可行方案受到关注。然而,并联电抗器在运行期间的累积损耗会增加。在这项研究中,我们改进了磁轭的磁通量,并分析了其对降低铁芯损耗的影响。我们采用了一种磁通量控制结构,它能使间隙式铁芯并联电抗器主脚产生的主磁通量和漏磁通量与绕组产生的漏磁通量相等。我们使用麦克斯韦三维有限元法分析和比较了有磁通量控制板和无磁通量控制板时轭产生的磁通量及其在平面方向上的分布。我们评估了两个在铁芯上安装了传感器的并联电抗器的损耗,以验证改善并联电抗器磁通分布的有效性。结果证实,磁通控制板降低了铁芯间隙型并联电抗器的铁损和绕组涡流损耗。为了在这些电抗器的整个运行寿命期间最大限度地减少损耗和噪音,以及为不同应用减小并联电抗器的尺寸和重量,还需要进行进一步的研究。
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来源期刊
Journal of Electrical Engineering & Technology
Journal of Electrical Engineering & Technology ENGINEERING, ELECTRICAL & ELECTRONIC-
CiteScore
4.00
自引率
15.80%
发文量
321
审稿时长
3.8 months
期刊介绍: ournal of Electrical Engineering and Technology (JEET), which is the official publication of the Korean Institute of Electrical Engineers (KIEE) being published bimonthly, released the first issue in March 2006.The journal is open to submission from scholars and experts in the wide areas of electrical engineering technologies. The scope of the journal includes all issues in the field of Electrical Engineering and Technology. Included are techniques for electrical power engineering, electrical machinery and energy conversion systems, electrophysics and applications, information and controls.
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