Electric Field Analysis and Optimization Design of DC-link Capacitor Bushings Based on the Weakform Finite Element Method

CHENG Shan; CHEN Zhengqi; ZHANG Hailong; HU Jinchang; WANG Jiacheng

doi:10.14044/j.1674-1757.pcrpc.2026.01.008

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Electric Field Analysis and Optimization Design of DC-link Capacitor Bushings Based on the Weakform Finite Element Method

POWER CAPACITOR & REACTIVE POWER COMPENSATION | Capacitor

Electric Field Analysis and Optimization Design of DC-link Capacitor Bushings Based on the Weakform Finite Element Method
基于弱式有限元法直流支撑电容器套管电场分析与优化设计
College of Electrical Engineering and New Energy, China Three Gorges University, Hubei Yichang 443002, China
Wuhan NARI Limited Liability Company, State Grid Electric Power Research Institute, Wuhan 430074, China
Vol. 47, Issue 1, Pages: 57-65(2026)
DOI：10.14044/j.1674-1757.pcrpc.2026.01.008
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CHENG Shan, CHEN Zhengqi, ZHANG Hailong, et al. Electric Field Analysis and Optimization Design of DC-link Capacitor Bushings Based on the Weakform Finite Element Method[J]. Power Capacitor & Reactive Power Compensation, 2026, 47(1): 57-65.
DOI：

CHENG Shan, CHEN Zhengqi, ZHANG Hailong, et al. Electric Field Analysis and Optimization Design of DC-link Capacitor Bushings Based on the Weakform Finite Element Method[J]. Power Capacitor & Reactive Power Compensation, 2026, 47(1): 57-65. DOI： 10.14044/j.1674-1757.pcrpc.2026.01.008.

摘要

干式直流支撑电容器套管在长期承受直流偏置与高频纹波电压作用下，易在伞裙内缘及衬圈界面等区域产生电场集中，引发局部绝缘老化，从而影响设备的长期运行可靠性。尽管其工频耐压裕度较高，但电场分布的不均匀性仍是国产化设计中的关键问题。为提高套管电场分析的精度，本文采用加权余量法弱化与有限元离散相结合的弱式求解框架，构建适用于复杂几何和多介质结构的三维静电场模型，并在高梯度区域采用局部网格加密以提升计算准确性。模型经工频耐压试验验证后用于结构优化分析。基于仿真结果提出的伞裙加深至8 mm、衬圈下部厚度增至15 mm的方案，可显著抑制局部场强并改善电场均匀性。研究结果为国产干式直流支撑电容器套管的结构设计、绝缘性能提升及工程应用提供了有效参考。

Abstract

The dry DC-link capacitor bushing，under the effect of long-term DC bias and high-frequency ripple voltages，is prone to electric-field concentration at such areas as inner edge of sheds and the interface of gasket rings，causes partial insulation aging and thus effects long term operation reliability of the equipment. Although the margin of its power frequency withstand voltage is higher，yet the non-uniformity of electric field distribution is still a key issue in localization design. For improving the accuracy of electric field analysis of bushing，a weak form framework combining the weighted residual method for weakening and finite element discretization is adopted，thereby constructing a three-dimensional electrostatic field model suitable for complete geometries and multi-medium structures，and the local mesh refinement is used in the high-gradient regions to enhance calculation accuracy. The model is used for structure optimization analysis after power frequency withstand voltage test verification. Based on the simulation result，a scheme is proposed to deepen the sheds to 8 mm and increase the thickness of the lower part of the gasket ring to 15 mm， which can significantly suppressure partial field intensity and improve electric field uniformity. The study results in this paper have provided effective guidance for structural optimization and insulation performance enhancement of localized dry DC-link capacitor bushing.

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references

董旭柱，华祝虎，尚磊，等.新型配电系统形态特征与技术展望[J].高电压技术，2021，47（9）：3021-3035.

DONG Xuzhu, HUA Zhuhu, SHANG Lei, et al. Morphological characteristics and technology prospect of new distribution system[J]. High Voltage Engineering, 2021, 47(9)：3021-3035.

高磊，张慧媛，许军，等.海上柔性直流输电系统的宽频带振荡非同时性研究[J].电测与仪表，2024，61（7）：50-56.

GAO Lei, ZHANG Huiyuan, XU Jun, et al. Asynchronous characteristics research of wideband oscillation in offshore windfarms connected toMMC-HVDC[J]. Electrical Measurement & Instrumentation, 2024, 61(7)：50-56.

赵畹君.高压直流输电工程技术[M].北京：中国电力出版社，2004.

曹玉石，张慧媛，许军，等.基于行波相位特征的海上风电柔直电缆故障保护方法的研究[J].电测与仪表，2024， 61（7）：81-87.

CAO Yushi, ZHANG Huiyuan, XU Jun, et al. Research on fault protection method of offshore wind power flexible direct cablebased on traveling wave phase characteristics[J]. Electrical Measurement & Instrumentation, 2024, 61(7)：81-87.

孙晓武.环境温度对直流支撑电容器温升影响的研究[J].电工电气，2020（2）：51-53.

SUN Xiaowu. Study on influence of ambient temperature on temperature rise of DC link capacitor[J]. Electrotechnics Electric(Jiangsu Electrical Apparatus), 2020(2)：51-53, 61.

李维维，高琪，芦锋.柔性直流输电工程用直流支撑电容器的开发探讨[J].电力电容器与无功补偿，2017，38（3）：95-98.

LI Weiwei, GAO Qi, LU Feng. Discussion on the development of DC-link capacitor for flexible HVDC transmission project[J]. Power Capacitor & Reactive Power Compensation, 2017, 38(3)：95-98.

孙晓武，李印达，曹崇峰.空气湿度对直流支撑电容器元件性能影响的研究[J].电力电容器与无功补偿，2020， 41（4）：51-56.

SUN Xiaowu, LI Yinda, CAO Chongfeng. Study on the in fluence of air humidity on DC link capacitor element[J]. Power Capacitor & Reactive Power Compensation, 2020, 41 (4)：51-56.

杨惠兰，侯涛，刘谆.金属膜电容老化特性及寿命模型研究[J].现代工业经济和信息化，2020，10（8）：20-22.

YANG Huilan, HOU Tao, LIU Zhun. Volume characteristics and life model of metel film capacitance[J]. Modern Industrial Economy and Informationization, 2020, 10(8)：20-22.

刘刚，姚成，贾磊.温湿度联合作用下金属化膜电容器的寿命预测[J].电力电容器与无功补偿，2025，46（1）：35-39.

LIU Gang, YAO Cheng, JIA Lei. Life prediction of metallized film capacitor under the combined action of temperature and humidity[J]. Power Capacitor & Reactive Power Compensation, 2025, 46(1)：35-39.

雷万钧，刘进军，吕高泰，等.大容量电力电子装备关键器件及系统可靠性综合分析与评估方法综述[J].高电压技术，2020，46（10）：3353-3361.

LEI Wanjun, LIU Jinjun, LYU Gaotai, et al. Review of reliability comprehensive analysis and evaluation methods for key components and system of large capacity power electronic equipment[J]. High Voltage Engineering, 2020, 46(10)：3353-3361.

金硕，阮江军，朱琳，等.基于臭氧检测法的电晕起始电压测量方法[J].高电压技术，2017，43（12）：4020-4025.

JIN Shuo, RUAN Jiangjun, ZHU Lin, et al. Measurement method of corona onset voltage based on ozone detection technology[J]. High Voltage Engineering, 2017, 43(12)：4020-4025.

杜志叶，田雨，金硕，等.大规模复杂模型电场计算的快速精细化有限元数值建模[J].中国电机工程学报，2018， 38（24）：7166-7173.

DU Zhiye, TIAN Yu, JIN Shuo, et al. A fast finite element numerical modeling method for the calculation of electric field in large scale complex model[J]. Proceedings of the CSEE, 2018, 38(24)：7166-7173.

侯智剑，徐梦蕾，王荀，等.超级电容器内部静电场仿真及其影响因素分析[J].电力电容器与无功补偿，2017，38 （1）：84-89.

HOU Zhijian, XU Menglei, WANG Xun, et al. Analysis on internal electrostatic field simulation and influencing factors of super capacitor[J]. Power Capacitor & Reactive Power Compensation, 2017, 38(1)：84-89.

张文凯，吴小钊，郑亚利，等.基于静电场分析的固封极柱局部放电研究[J].高电压技术，2015，41（11）：3858-3865.

ZHANG Wenkai, WU Xiaozhao, ZHENG Yali, et al. Research on embedded pole partial discharge based on electrostatic field analysis[J]. High Voltage Engineering, 2015, 41(11)：3858-3865.

郑劲，孔巾娇，梁红胜，等.特高压换流变压器阀侧出线绝缘结构电场分析[J].高电压技术，2022，48（9）：3526-3532.

ZHENG Jin, KONG Jinjiao, LIANG Hongsheng, et al. Electric field analysis for valve-side lead-out insulation structure of UHVDC converter transformer[J]. High Voltage Engineering, 2022, 48(9)：3526-3532.

张维凯，孙强，葛延鹏，等.基于NSGA-Ⅱ算法的GIS隔离开关盆式绝缘子电场分布和机械性能综合优化[J].高电压技术，2025，51（1）：336-345.

ZHANG Weikai, SUN Qiang, GE Yanpeng, et al. Integrated optimization of electrical field distribution and mechanical performance of basin-type insulator in GIS disconnector based onNSGA-Ⅱ[J]. High Voltage Engineering, 2025, 51(1)：336-345.

刘招成，崔翔，李学宝，等.高压大功率IGBT器件绝缘结构的电场计算研究综述[J].中国电机工程学报，2024， 44（1）：214-230.

LIU Zhaocheng, CUI Xiang, LI Xuebao, et al. Review on the electric field calculation of insulation structure of highvoltage and high-power IGBT device[J]. Proceedings of the CSEE, 2024, 44(1)：214-230.

杨新生，张云鹏，徐桂芝，等.基于T- ψ 有限元法的多目标函数变压器优化设计[J ] .电工技术学报，2021，36（z1）：75-83.

YANG Xinsheng, ZHANG Yunpeng, XU Guizhi, et al. Multi-objective optimization design of transformer base on T- ψ finite element method[J ] . Transactions of China Electrotechnical Society, 2021, 36(z1)：75-83.

萨迪库.电磁学[M].纽约：牛津大学出版社，2018.

拉奥S S.工程有限元方法[M].阿姆斯特丹：爱思唯尔出版社，2017.

郝震，江长明，李欢，等.基于变压器套管升高座处电流互感器的高频局部放电监测技术[J].高电压技术，2025， 51（3）：1126-1134.

HAO Zhen, JIANG Changming, LI Huan, et al. High-frequency partial discharge monitoring technology based on TAs in transformer bushing risers[J]. High Voltage Engineering, 2025, 51(3)：1126-1134.

交流电气装置的绝缘配合第1部分：定义、原则和规则：GB/T 1001.1—2021[S].2021.

Insulation coordination for AC electrical installations—Part 1：Definitions, principles and rules：GB/T 1001. 1—2021[S]. 2021.

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