Aiming at the problems of large scale, multi-constraint and non-linear optimal substation locating, an algorithm is proposed which adapts to the actual geography state, has optimal systems and ensures the efficient speed. Based on Genetic Algorithm and Particle Swarm optimization(GA-PSO), this algorithm adopts real-coded strategy and elite-preservation strategy, then uses a minimum annual cost of substation planning to be fitness. This algorithm realizes the self-adjusted search of solution in spatial range...