微分进化算法结合有限元应用于避雷器均压环优化  

Optimization of Arrester Grading Ring Based on Differential Evolution Algorithm and Finite Element Method

作　　者：姜志鹏[1] 文习山[1] 蓝磊[1] 余轶[1] 袁小清[1] 伍仕红 

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《高压电器》2014年第11期75-80,共6页High Voltage Apparatus

摘　　要：避雷器安装均压环能有效改善电阻片的电压承担率分布情况,均压环优化是以均压环管径、环径、罩入深度为优化自变量,最大电压承担率umax和均压环表面最大场强Emax为因变量,其中,umax为目标函数,Emax小于起晕场强为约束条件,均压环的最优参数难于求解但易于评估。为解决这一问题,采用微分进化算法结合有限元对750 kV避雷器均压环进行了优化计算,优化结果表明:优化后的避雷器电阻片电压承担率分布均匀程度改善明显,电阻片最大电压承担率umax由1.429降低至1.108,均压环表面最大场强由2.555 kV/mm改善至1.673 kV/mm,均满足相关标准要求。The optimization of attester grading ring independent variables, and takes the maximal voltage the surface of grading ring as dependent variables takes its pipe diameter, ring radius, and shielding depth as distribution ratio and the maximal electrical field intensity on The maximal voltage distribution ratio is set as the objective function, and the constraint condition is that the maximal electrical field intensity must be lower than the electrical field intensity for corona inception. The optimum parameters are difficult to be solved, but they are easy to be evaluated. Thus, differential evolution algorithm is combined with finite element method to optimize the grading ring for a 750 kV arrester. The results show that the homogeneous degree of voltage distribution ratios of the grading ring is significantly improved after optimization, the maximal voltage distribution ratio is reduced from 1.429 to 1.108, and the maximal electrical field intensity is depressed from 2.555 kV/mm to 1.673 kV/mm, all satisfying the relevant standards.

关 键 词：微分进化算法 有限元 避雷器 均压环 优化 

分 类 号：TM862[电气工程—高电压与绝缘技术]