AUTHOR=Zhang Xianglong , Zhou Chuang , Hua Yibo , Dong Shufeng 

TITLE=Research on distribution–microgrid-coupled network demand response based on a multi-time scale

JOURNAL=Frontiers in Energy Research

VOLUME=Volume 12 - 2024

YEAR=2024

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2024.1366859

DOI=10.3389/fenrg.2024.1366859

ISSN=2296-598X

ABSTRACT=In the "dual carbon" strategy, leveraging distributed energy resources in distribution is crucial. The integration of renewable energy adds volatility to the grid, requiring enhanced regulation capabilities due to renewable energy dominance. Relying solely on generation-side resources for regulation is inadequate, necessitating a flexible demand response from diverse demand-side resources. Distribution-microgrid-coordinated demand response is a top-down execution of instructions from the distribution network, not a user-driven reaction to pricing policies. This coordination is critical for integrating distribution and microgrids, enhancing regulation capabilities. This paper employs a physical connection and information exchange between the distribution network and microgrids to leverage the advantages of centralized-distributed optimization. This establishes a coordinated demand response model between the distribution network and microgrids, gradually establishing a new type of distribution network that integrates interconnected grids and microgrids. This enables layered and zonal control. The coordinated demand response between the distribution network and microgrids must be addressed at multiple time scales. This necessitates the analysis of the response characteristics of various load resources within microgrids and the categorization and modeling of loads based on their response speeds. Additionally, a method for evaluating the multi-time scale schedulable capacity of microgrids is proposed. Finally, a coordinated demand response model between the distribution network and microgrids based on schedulable capacity assessment is established. This model is validated through case studies, demonstrating its effectiveness. The coordinated demand response between distribution networks and microgrids enables them to operate in a collaborative and economically safe manner.