摘要
固态断路器的极板边缘电场分布计算是实现安全裕度下断路器均压环优化设计的关键。应用有限元法将断路器内的典型结构简化成轴对称模型,可实现准确快速计算。对充电放电暂态变化过程的电路仿真,发现了放电过程中电场强度比充电过程电场强度更小。基于有限元方法,计算了电场分布,优化设计了均压环。引入均压环管径、外径、安装距等结构参数,提出二阶灵敏度系数的概念,研究了各参数对均压环表面及断路器极板边缘电场分布的影响,有效地将均压环表面的最大电场强度控制在2.5 kV/mm以下。得出了满足250 kV固态断路器均压环条件的有效优化方案。
The calculation of the electric field distribution along the plates of solid state breaker is the key to optimal design of the grading ring under a margin of safety.The typical structure in the breaker can be reduced to axisymmetric model by using the finite element method,which makes computation fast and accurate.The simulation results of the transient process show that the effect of the electric field intensity on electronic device is negligible.The finite element method was adopted to calculate the electric field and optimize design of the grading rings.The structural parameters of grading rings for breaker,such as the ring radius,radius of the ring tube and mounting height,were introduced.A new concept of second-order sensitivity coefficient is proposed to calculate the influences of different structural parameters of grading rings on potential and electric field distribution along the plates of solid state breaker,which effectively controlls the maximal electric field intensity below 2.5 k V/mm.The optimal configuration scheme of grading ring of 250 k V solid state breaker is given.
作者
卢斌先
廖思卓
熊俊
王勇
冯启琨
郭庆峰
LU Bin-xian;LIAO Si-zhuo;XIONG Jun;WANG Yong;FENG Qi-kun;GUO Qing-feng(Beijing Key Laboratory of High Voltage & EMC,North China Electric Power University,Beijing 102206,China;Electric Power Test & Research Institute,Guangzhou Power Supply Bureau Co.,Guangzhou 510410,China)
出处
《科学技术与工程》
北大核心
2018年第20期123-129,共7页
Science Technology and Engineering
基金
国家自然科学基金(51377057)
南方电网科技项目(GZM2015-006)资助
关键词
振荡波发生器
固态断路器
均压环
电场分布
有限元法
oscillating wave generator
solid state breaker
grading ring
electric field distribution
finite element method