Hot-spot Temperature Inversion for Metallized Film Capacitors Based on Conjugate Gradient Method

被引：0

作者：

Li, Haobo ^{[1
]}

Li, Hua ^{[1
]}

Zhang, Guohao ^{[1
]}

Lan, Jing ^{[1
]}

Lin, Fuchang ^{[1
]}

Sun, Pei ^{[2
]}

机构：

[1] State Key Laboratory of Advanced Electromagnetic Technology, School of Electrical and Electronic Engineering, Huazhong University of Science & Technology, Wuhan

[2] State Grid Shanghai Municupal Electric Power Company, Shanghai

来源：

Gaodianya Jishu/High Voltage Engineering | 2024年 / 50卷 / 09期

关键词：

conjugate gradient method; hot-spot temperature rise; inversion model; metallized film capacitors; surface temperature rise;

D O I：

10.13336/j.1003-6520.hve.20230874

中图分类号：

学科分类号：

摘要：

Hot-spot temperature is one of the important factors affecting the insulation life of metallized film capacitors, because it can not be measured directly but be usually obtained by thermal simulation analysis or temperature inversion. This paper proposes a hot-spot temperature inversion model based on the conjugate gradient method (CG). The inversion model establishes the temperature distribution objective function of the internal heat transfer process, adopts the finite difference method to solve the capacitor temperature field, and adopts CG to analyze the internal temperature distribution by iterative solution. At the same time, an AC temperature rise test is carried out to check the simulation model and the inversion model. The results show that there is a linear relationship between the hot-spot temperature rise and the surface temperature rise, the hot-spot temperature appears in the center of the MFC near the mandrel, and the maximum error between the inversion and the simulation model is 4.35%, which indicates that the model can realize the effective prediction of temperature distribution and hot-spot distribution under field working conditions. © 2024 Science Press. All rights reserved.

引用

页码：4163 / 4170

页数：7

共 22 条

[1]

GUO Xiaofan, ZHA Kunpeng, CAO Junzheng, Et al., Analysis of temperature rise characteristic of metalized film capacitor underoperating conditions in modular multi-level converter, Electrical Measurement & Instrumentation, 56, 15, pp. 14-20, (2019)

[2]

SARJEANT W J, MACDOUGALL F W, LARSON D W, Et al., Energy storage capacitors: aging, and diagnostic approaches for life validation, IEEE Transactions on Magnetics, 33, 1, pp. 501-506, (1997)

[3]

SCHNEUWLY A, GRONING P, SCHLAPBACH L, Et al., Breakdown behavior of oil-impregnated polypropylene as dielectric in film capacitors, IEEE Transactions on Dielectrics and Electrical Insulation, 5, 6, pp. 862-868, (1998)

[4]

FENG B Y, LI Y S, HE M B., Thermal characteristics of all-film pulsed capacitors in application of repetitive pulse discharge, IEEE Transactions on Dielectrics and Electrical Insulation, 28, 4, pp. 1408-1415, (2021)

[5]

YIN Z J, WU R, HYGUM M, Et al., Thermal stress model of transversal forced air-cooled capacitor banks for MW power converters, Proceedings of 2019 10th International Conference on Power Electronics and ECCE Asia, pp. 3096-3101, (2019)

[6]

LV C L, LIU J J, ZHANG Y, Et al., A high-resolution analytical thermal modeling method of capacitor bank considering thermal coupling and different cooling modes, IEEE Transactions on Power Electronics, 38, 6, pp. 7674-7684, (2023)

[7]

KONG Z H, LIN F C, JIANG Y D, Et al., Study of temperature rise of metallized capacitors applied in repetitive pulse, IEEE Transactions on Dielectrics and Electrical Insulation, 16, 4, pp. 1100-1105, (2009)

[8]

LEI Y X, YANG Y, BAI X Y, Et al., Multi-physical field simulation of nonlinear high-voltage ceramic capacitor based on COMSOL, Proceedings of 2022 4th International Conference on Smart Power & Internet Energy Systems, pp. 138-143, (2022)

[9]

LI Z W, LI H, HUANG X, Et al., Temperature rise of metallized film capacitors in repetitive pulse applications, IEEE Transactions on Plasma Science, 43, 6, pp. 2038-2045, (2015)

[10]

LI Hua, CHEN Qiren, LI Haoyuan, Et al., Temperature rise characteristic and design optimization of AC high voltage metallized film capacitor, High Voltage Apparatus, 54, 1, pp. 1-8, (2018)

← 1 2 3 →