Optimized control strategy of green buildings with PV generation and energy storage integration

Abstract

Due to the pressure of the worldwide governments on environmental protection, the power supply mode of conventional buildings is meeting a continuous change. In order to reduce carbon dioxide emission, the green building, whose energy supply system has ph otovoltaic (PV) generation and energy storage (ES) integration, has received much attention. Different from the conventional building energy system, the coordination of the PV and ES may significantly influence the economy and operation stability of the gr een building operation, especially when the green building operates under an electric market. In this paper, an optimized control strategy for green buildings with PV and ES integration is proposed considering the electricity prices. The objective of the p roposed optimized control strategy is to minimize the electric cost while maintaining the operation stability of the green building. Firstly, the battery charging strategy and the optimal system operation strategy are analyzed under the normal conditions o f power generation and consumption. Then, according to the probability distribution of the power generation curves and power consumption curves, some typical scenes are divided for the modeling of the optimal economic model. Thirdly, the optimal economic m odel is reorganized by involving the active load, such as interruptible load and non interruptible load. Finally, the proposed optimized control strategy is solved from the optimal economic model in order to realize the regulation of energy storage and PV. The effectiveness of the proposed strategy is verified by the case studies.