Research on Distribution-Microgrid-Coupled Networks Demand Response Based on Multi-Time Scale Provisionally Accepted
Xianglong Zhang
Shufeng Dong- 1State Grid Economic and Technological Research Institute Co., Ltd, China
- 2Zhejiang University, China
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.
Keywords: carbon peaking and carbon neutrality goals, distribution and micro-grid cooperation, demand response, Multi-time scale, Load classification, scheduling capability
Received: 07 Jan 2024;
Accepted: 30 Apr 2024.
Copyright: © 2024 Zhang, Zhou, Hua and Dong. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Prof. Shufeng Dong, Zhejiang University, Hangzhou, 310058, Zhejiang Province, China