基于改造粒子群游的超高压故障限流器全局优化配置算法

Global optimization algorithm for fault current limiter configuration based on rearranged particle swarm optimization

考虑超高压故障限流器在大电网中的应用特点,以获取预设全局限流效果和确保配置最优经济性为目标,基于邻接转移阻抗灵敏度加权值,提出一种能够区分短路电流关键路径、反映限流经济代价、指示全局限流效果及均衡水平的适应函数,作为故障限流器优化配置问题的数学模型。将装设数量、单台阻抗及布点配置视为大规模混合整形优化问题,根据故障限流器应用特点对粒子群游的解编码、位移操作等方面进行改造,引入灵敏度排序降维、追加支路法简化中间计算量,形成了一种故障限流器配置问题的全局优化算法,并以不同规模算例测试验证了该算法的有效性。

With the consideration of application characteristics of FCL（Fault Current Limiter） in power grid and in order to obtain global fault current limiting effect and the optimal economical efficiency, an index fitness function based on sensitivity weighted value of nearby transfer impedance is proposed as the mathematical model of FCL configuration optimization, which can distinguish critical fault current path and reflect the economic cost of current limiting,global current limiting effect and its proportionality. An global optimization algorithm is proposed. With the number of FCL, impedance of single FCL and installation spots taken as a large-scale mixed integer optimization problem, it improves the solution coding and displacement operation of particle swarm optimization. With application of sensitivity rank dimension reduction and additional branch method, it reduces the calculative quantity. Its effectiveness is verified by case tests in different scale.