A real-time optimal energy dispatch for microgrid including battery energy storage

Abstract

Microgrid is an effective system for integrating distributed generations, energy storages, loads and some auxiliary devices. To improve the efficiency of the system, the optimal energy dispatch is an effective method that can control these kinds of sources and loads. A real-time optimal energy dispatch for microgrid is proposed in this paper, which can reduce the energy loss and enhance the economy. Compared with the conventional dispatch method, that is more useful because the real-time dispatch can avoid some predictive error accumulation and the battery energy storage in the microgrid can transfer energy from one scheduled period to another. First, the object function of optimal energy dispatch is put forward and the constraints of microgrid are analyzed. Second, after the optimal model is established, the particle swarm optimization algorithm is adopted to search the optimal solution of the problem. Third, the best rated capacity of batteries of a certain microgrid is determined by simulation. At last, the optimal energy dispatch is verified by a simulation test and the result reveals this dispatch is effective and practical.