Optimal dispatch of air conditioning load in micro-grid considering the consumers' comfort

Abstract

Micro-grid integrates load, renewable energy power generation and energy storage devices as a whole system, providing an effective way for renewable energy accessing power grid. In the micro-grid system, the cost of energy storage devices is high, which has bad influences on the economic operation. For this reason, this paper proposes the model which takes advantage of micro-grid having an internal AC (air conditioning) load to stabilize power fluctuations and puts forward the AC load optimal dispatch model considering the consumers' comfort in micro-grid system. The objective functions of model are the interaction cost between micro-grid and distribution system, the incentive cost of AC load and the net load variance of micro-grid system. By optimizing the AC load, the operation cost of micro-grid system is minimized, and the fluctuation of micro-grid load is reduced. The results show that the optimal dispatch can reduce the operating cost of micro-grid system and the net load variance of micro-grid system under the premise of satisfying the AC load and the consumer' comfort.