A three-dimensional evaluation method for building energy systems to guide power grid-friendly interactions during the planning and operational stages

Abstract

Under the premise of on-site demand satisfaction and improving the efficiency of energy utilization, grid-friendly buildings can achieve stable power consumption without increasing dispatch pressure on local power grids. They can even actively respond to the grid's demand. The existing methods for evaluating grid-friendly building energy systems are based on a single perspective and scenario. There is no multidimensional evaluation system that takes into account the requirements that exist in the planning and operational stages of buildings. Thus, building designers do not know the short- and long-term response effect or grid-friendly potential of alternative schemes. To address this issue, three evaluation dimensions of grid-friendly building energy systems have been determined based on the requirements that exist in the planning and operational stages, and a comprehensive evaluation system has been developed. First, the three evaluation dimensions were defined by analyzing the evaluation needs. Second, indexes for the three dimensions were developed. Third, the optimal grid-friendly building energy system origin was calibrated with the index extremum analysis. The integrated score calculation approach was developed with the spatial Euclidean distance. Finally, the correctness and rationality of the proposed method have been verified via comparison with the traditional method and dimensional reciprocity. The results show that energy storage can significantly increase the grid-friendly capacity of a building's energy system and enhance the long-term and short-term response effects. It is anticipated that building designers will be better equipped to select alternative schemes if they use the proposed method and that using this method will support the optimization of building-side scheduling and grid-side management strategy formulation.