Optimal Control and Scheduling of Distribution Stations

A simple method for energy efficiency optimization without establishing an accurate mathematical model of the distribution station is given. It proves the optimal load distribution method between transformers, which is to keep the operating energy efficiency of each operating transformer equal, Yao's Theorem 1. It also proves the optimal switching method of the number of operating units between transformers, which is to keep the switching point at the same point of the overall energy efficiency of the distribution station, or the maximum output value of the transformer, Yao's Theorem 2.