中国电机工程学报2026，Vol.46Issue(10)：4294-4303,中插30,11.DOI:10.13334/j.0258-8013.pcsee.251245
高频谐波作用下阀侧套管温度场与电场分布特性研究
Temperature-electric Field Distribution of Value Side Bushing Under High Frequency Harmonic Superposition
摘要
Abstract
With the large-scale application of flexible DC transmission and other power electronic equipment in the new power system,the harmonic problem in the system has become increasingly prominent.Especially,the influence of high-frequency harmonics is more significant.However,no current study has calculated the dielectric heating characteristics of insulating materials in bushings when AC/DC voltages are superimposed with high-frequency harmonic voltages based on their actual dielectric loss characteristics at high frequencies and high temperatures,which makes it possible that the actual temperature and electric field distribution in the equipment under the action of harmonic voltage may differ significantly from the designed values.This poses a threat to the long-term operational safety of the equipment.Therefore,the dielectric properties of the impregnated paper material at high frequencies are measured and obtained in the paper.On this basis,a calculation model for the electric field and temperature distribution of the valve side bushing under the superimposed high-frequency harmonics is established.The electrical and thermal stress distribution characteristics of the bushing under different harmonic frequencies,contents and different insulating material properties are obtained.The calculation results show that high-frequency harmonics can cause more severe dielectric loss heating in the insulating medium inside the bushing.Thus,a higher temperature gradient is formed in the parallel direction of the electric field of the insulating layer of the equipment,triggering a higher gradient distribution of the material's resistivity.And more severe electric field distortion is formed under direct current voltage.The research of this paper provides an important reference for the design of bushings under the action of high frequency and the optimization of insulating materials.关键词
套管/高频谐波/介电性能/温度梯度/环氧胶浸纸Key words
bushing/high frequency harmonic/dielectric property/temperature gradient/epoxy resin impregnated paper分类
信息技术与安全科学引用本文复制引用
马闯,齐波,汤浩,杨霄,张一,黄琛,李桂缘,李成榕..高频谐波作用下阀侧套管温度场与电场分布特性研究[J].中国电机工程学报,2026,46(10):4294-4303,中插30,11.基金项目
国家电网有限公司科技项目(5500-202255397A-2-0-ZN).Science and Technology Project of State Grid Corporation of China(5500-202255397A-2-0-ZN). （5500-202255397A-2-0-ZN）
