基于粒子群和人工免疫融合算法的接地网优化设计  

Optimization design of grounding system based on the particle swarm and artificial immune algorithm

作　　者：李越[1] 王丰华[1] 金之俭[1] 吴剑敏[2] 

机构地区：[1]上海交通大学电气工程系,上海200240 [2]上海市电力公司超高压输变电公司,上海200063

出　　处：《电力系统保护与控制》2011年第15期120-126,共7页Power System Protection and Control

基　　金：国家重点基础研究发展计划(973计划)(2005cb221500)~~

摘　　要：为了提高接地网的均压效果和降低接触电压与跨步电压,更好地保障人身和设备的安全,提出了基于粒子群和人工免疫融合算法的优化方法对接地网进行优化设计。在考虑接地网的自身电阻、电感和对地电容的基础上,基于场路结合法建立了接地网的不等电位分析模型,得到了接地网导体的散流分布和地面电位分布。同时,通过建立以地面电位分布最大电位差最小为目标的寻优函数,使用粒子群和人工免疫算法相结合的优化方法得到了接地网导体放置位置的最优解。计算结果表明,优化后的接地网的地面电位分布更加均匀,同时降低了接地网导体的散流密度。所提出的优化方法具有较强的搜索能力,收敛速度快且不易陷入局部最优的特点,便于工程设计人员使用,提高接地系统的安全性。In order to improve the voltage-sharing effect of grounding system and reduce the touch voltage and step voltage to ensure the safety of persons and equipment,optimization design of the grounding grid based on the particle swarm and artificial immune algorithm is proposed.By considering the self-grounding resistance,inductance and capacitance to the ground,unequal-potential ground grid model is established through the combination of electromagnetic field with circuit.Then the distributions of stray current and surface potential are obtained.Finally,optimal solution of the placement of grounding conductor placement is obtained through the application of the particle swarm and artificial immune algorithm,by establishing optimization function with the objective of maximum distribution of the surface potential and minimal potential difference.It is shown that the distribution of surface potential is more uniform after the optimization design of ground grid,and the stray current density of grounding conductor also decreases.In addition,the optimization proposed in this paper has the features of excellent searching ability,fast convergence speed and avoiding local optimal,so it is convenient for engineers to design the grounding system with high safety.

关 键 词：接地网 不等电位 优化设计 粒子群 人工免疫 

分 类 号：TM862[电气工程—高电压与绝缘技术]