Advances in HVdc Bushing Using Nonlinear Materials: Theory, Materials, Structure, and Realization

IF 3.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Power & Energy Magazine Pub Date : 2023-03-01 DOI:10.1109/MPE.2022.3230891

Zhikang Yuan, G. Sun, Zhiwen Huang, Jun Hu, Jinliang He

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引用次数: 0

Abstract

Bushings are the key equipment in a high-voltage dc (HVdc) project. HVdc bushings not only provide the insulating medium between the HV conductor and the ground electrode but also physically fix the HV conductor in the transformer or in the feedthrough assembly. In operation, HVdc bushings always experience high electric field and load current. When a fault occurs, the bushing will inevitably face instantaneous overvoltage and overcurrent conditions. This harsh operating condition poses a serious threat to the long-term performance and reliability of HVdc bushings. However, the construction of extra-HVdc projects, ultra-HVdc projects, and flexible dc transmission projects is in full swing. The market demand for HVdc bushings is growing rapidly. Take China, for example: from 2013 to 2020, about 2,600 transformer bushings for ultra-HVdc converter transformers and 400 wall bushings for valve halls were needed. The annual demand for HVdc bushings is about 375, and the cost is more than 1.7 billion CNY per year. Considering the construction of extra-HVdc and flexible dc projects, the market scale of an HVdc bushing will increase in the future.

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非线性材料HVdc套管的理论、材料、结构和实现进展

衬套是高压直流工程中的关键设备。高压直流套管不仅在高压导体和接地电极之间提供绝缘介质，而且还将高压导体物理地固定在变压器或馈通组件中。高压直流套管在运行过程中，始终承受着较大的电场和负载电流。当故障发生时，套管不可避免地会面临瞬时过压和过流的情况。这种恶劣的运行条件对高压直流套管的长期性能和可靠性构成了严重威胁。而特直流、特直流、柔性直流输电工程建设则如火如荼。高压直流套管的市场需求正在迅速增长。以中国为例，2013年至2020年，特高压直流换流变压器变压器套管需求约2600个，阀厅壁套需求约400个。年直流套管需求量约375套，年成本超过17亿元。考虑到超高压直流和柔性直流工程的建设，未来直流套管的市场规模将会增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Power & Energy Magazine 工程技术-工程：电子与电气

CiteScore

5.10

自引率

0.00%

发文量

145

审稿时长

>12 weeks

期刊介绍： IEEE Power & Energy Magazine is dedicated to disseminating information on all matters of interest to electric power engineers and other professionals involved in the electric power industry with a focus on advanced concepts, technologies, and practices associated with all aspects of electric power from a technical perspective in synergy with nontechnical areas such as business, environmental, and social concerns. IEEE Power & Energy Magazine keeps its readers up-to-date on the latest technological advancements, industry news, business trends and strategies, products, and publications. Important newsworthy items concerning the worldwide activities and achievements of IEEE Power & Energy Society (PES), its organizational units, and its individual members are also included.