摘要
在总结特高压直流输电电场分析及均压环设计研究的基础上,通过模拟实际工况添加人工边界,将可控消能装置电场求解转化为在有界场域内的恒定电场问题,采用有限元分析中的直流传导场进行可控消能装置电场分布计算及均压环优化设计。对于导体与电介质电阻率差别太大导致的电位、场强发散问题,根据单元电阻的分压关系确定各电极电位,通过将不同介质的电导率同时增大相同的数量级加以解决。计算结果表明在可控消能装置未加装均压环时电场分布极不均匀。通过调整均压环的结构尺寸、安装间距、安装数量,以计算结果小于起晕场强为判据,最后得到均压环的结构参数及安装方案,使得可控消能装置整体及均压环表面最大场强控制在合理范围内。
Based on the calculation methods of UHVDC electric field and the research on the design of grading rings,the electric field calculation of controllable energy absorption device is limited to the finite domain by adding artificial boundary.DC electric field is not the static field,so the author uses DC conductor of finite element analysis to calculate the electric field of the controllable energy absorption device and to design the grading rings.The potential of electrodes is determined by the unit resistance and voltage relationship.Because the conductivity of conductor and dielectric is so different,the conductivity of different dielectric is increased by multiplying a same number to solve the divergence problem in calculation.The simulation results show that,the electric field of controllable energy absorption device is extremely uneven without grading rings.By adjusting the size,space and quantity of the grading rings,the optimal grading ring parameters and installation scheme are proposed and the maximum electric field is limited to a reasonable range.
作者
严伟
郑毅
张广泰
张科乾
郭黎黎
徐军波
YAN Wei;ZHENG Yi;ZHANG Guangtai;ZHANG Keqian;GUO Lili;XU Junbo(NR Electric Co.,Ltd.,Nanjing 211102,China;NR Electric Power Electronics Co.,Ltd.,Changzhou 213025,China)
出处
《电瓷避雷器》
CAS
北大核心
2023年第4期205-212,共8页
Insulators and Surge Arresters
基金
南瑞集团有限公司科技项目资助(直流可控限压器关键技术研究和设备研制,编号:JS2001706)。
关键词
可控消能装置
有界场域
电场分布
均压环
优化措施
controllable energy absorption device
finite domain
electric field distribution
grading ring
optimization measure
