摘要
变压器是电力系统的主要设备,发电机发出的电能通过变压器升压进行远距离的传输,然后再通过变压器降压输送到各地。对于整个电网的稳定性,变压器有着举足轻重的作用。随着经济的发展、科技的进步,大容量、特高压的变压器更能满足现代发展需求,对于变压器的绝缘设计与温升方面的要求必需要更加重视。当然满足绝缘裕度的前提下,也要充分考虑到经济性。主要研究电力变压器220 kV高压首端引线分别采用包扎厚绝缘及分隔小油隙这两种结构,使用专业电场软件对这两种引线绝缘结构的电场进行仿真计算和校核。计算结果表明,这两种绝缘结构布置是合理的,安全系数相差不大。并且使用有限元软件对这两种的引线绝缘结构进行温升计算,通过比较分析,改进后的绝缘结构不仅温升降低接近一倍,而且绝缘的包扎时间减少。
Transformer is the main equipment of the power system,the electric energy from the generator is transmitted through the transformer boost for a long distance,and then transmitted to various places through the transformer buck.Transformers play a pivotal role in the stability of the entire power grid.With the development of economy and the progress of science and technology,large-capacity and UHV transformers can better meet the needs of modern development.More attention must be paid to the requirements of insulation design and temperature rise of transformers.Under the premise of meeting the insulation margin,the economy should be taken into full consideration.The structure of thick insulation and small oil gap of 220 kV high voltage lead of power transformer were mainly studied and professional electric field software was used to simulate and the electric field of these two kinds of lead insulation structures was checked.The calculation results show that the arrangement of the two insulation structures is reasonable and the safety factor is not much different.And the finite element software was used to calculate the temperature rise of the two lead insulation structures.Through comparative analysis,the improved insulation structure not only has a lower temperature rise of nearly one time,but also reduces the wrapping time of insulation.
作者
殷连开
刘文秋
赵伟娟
李昂
Yin Liankai;Liu Wenqiu;Zhao Weijuan;Li Ang(Guangzhou Siemens Transformer Co.,Ltd.,Guangzhou 510530,China)
出处
《机电工程技术》
2022年第1期226-229,共4页
Mechanical & Electrical Engineering Technology
关键词
电力变压器
引线绝缘
电场分析
温升分析
power transformer
lead insulation
electric field analysis
temperature rise analysis
