The Load Aggregation Strategy of Central Air-conditioning for Smoothing Wind Power Fluctuation

Abstract

Compared with the household air-conditioning, central air-conditioning has larger rated capacity and more concentrated operating period. These characteristics of the central air-conditioning make it a high quality resource that can be participated in the centralized load regulation. Firstly, the equivalent thermal parameters model of central air-conditioning and the thermal comfort model of human body are established, and then the aggregation strategy of central air-conditioning loads is proposed to minimize the operation fees of load aggregator under the constraints of the minimum aggregated load requirement, adjustment time period and users' comfort index. The particle swarm optimization algorithm is adopted to solve the optimal problem in this paper. Finally, the aggregated central air-conditioning loads are used to smooth the wind power fluctuation in the wind farm, and the optimal dispatch costs are compared with the investment cost of energy storage equipment needed to compensate the power fluctuation. The analysis results show that the load aggregation strategy of central air-conditioning is more economical than the configuration of traditional energy storage equipment.