高电压技术2018，Vol.44Issue(6)：1828-1835,8.DOI:10.13336/j.1003-6520.hve.20180529014
油-纸绝缘内部空间电荷的运动规律
Motion Law of Internal Space Charge in Oil-paper Insulation
摘要
Abstract
No effective method can be adopted to consider the influence of space charges when calculating the total electric field distribution in the main insulation system of the valve-side winding of converter transformer. In order to calculate total electric field in oil-paper insulation system, we put forward a new simulation method in oil-paper insulation based on a transient upstream finite element method (TUFEM), in which the time variable is considered. The TUFEM is used to calculate the total electric field in oil-paper insulation system by considering motion law of space charges. The simulation method is verified by comparing the simulation results to the test data in references. The motion law of space charges and distribution characteristics of the electric field under difference voltage values in single-layer oil-paper insulation is obtained. The distribution of space charge in a double-layer oil paper insulation system is further studied by this method. The results show that the TUFEM has an excellent accuracy compared with test data in references. When carrier mobility is a constant, the higher the initial electric field intensity is, the less time the space charge reaching dynamic stability will take, and the greater distortion rate of internal total electric field will be. Space charges are hindered on the interface of double layers of oil-paper insulation, which can be simulated by setting an appropriate interface potential barrier. This method will promote the design and optimization level of UHVDC converter transformers.关键词
瞬态上流元法/油–纸绝缘/合成电场/空间电荷/特高压直流Key words
transient upstream finite element method/oil-paper insulation/total electric field/space charges/UHVDC引用本文复制引用
杨知非,廖一帆,杜志叶,王国利,黄国栋,阮江军..油-纸绝缘内部空间电荷的运动规律[J].高电压技术,2018,44(6):1828-1835,8.基金项目
国家自然科学基金(51741708 （）
51477120) （）
特高压工程技术(昆明、广州)国家工程实验室开放基金(CSGTRC[2015]Q1543B14). Project supported by National Natural Science Foundation of China(51741708, 51477120), National Engineering Laboratory for Ultra High Voltage Engineering Technology(Kunming, Guangzhou) Foundation(CSGTRC[2015]Q1543B14). （昆明、广州）
