Coordinated power-water optimization for precision irrigation among distribution network and agricultural parks

Abstract

With more and more agricultural parks are integrated to the electrical distribution network, the disordered characteristics of farmers’ irrigation water consumption will not only increase the cost of water and electricity, but also cause security problems in traditional term of rural distribution network, such as large short-term load fluctuation, overload and transformer load imbalance. In this context, this paper proposes a double-layer master–slave game model of power-water interaction and coordination between distribution network and agricultural irrigation park under photovoltaic (PV) assisted agricultural precision irrigation. The upper layer (electrical distribution network) plays an interactive game with the lower layer (agricultural irrigation parks) by establishing effective time-of-use (TOU) price. On the one hand, the electrical distribution network takes the operation security as the optimization objective, it could optimize line loss by network configuration and guides agricultural irrigation parks to consume electricity orderly by formulating electricity prices. On the other hand, agricultural irrigation parks take satisfaction and cost as the optimization objective after receiving TOU price from upper layer, and regulates the operation time and intensity of irrigation pumps to realize precise irrigation. Finally, an example is given to verify the model on the modified 148-node system. It is determined that the model can effectively support the safe and reliable operation of rural distribution network while realizing the transformation of agricultural irrigation water use from low efficiency to economical and high efficiency, so as to achieve win–win between agricultural irrigation park and distribution network.