Transactive Energy Supported Economic Operation for Multi-Energy Complementary Microgrids

Multi-energy complementary microgrids (MECMs) provide an important means to accommodate renewable energy sources due to their abundant adjustable resources and flexible operation modes. However, limited capacity and controllability are the main obstacles that prevent MECMs from participating in the market. In this study, we develop a transactive energy (TE) mechanism-supported energy sharing strategy to coordinate interconnected MECMs in a regional integrated energy system (RIES), where the uncertainty of renewable energy and loads is taken into account via stochastic programming. An RIES operator is introduced to trade with the utility grid as an intermediate player between the electricity market and MECMs. For the TE mechanism, we employ alternating direction method of multipliers (ADMM) algorithm to achieve distributed optimization of energy sharing, which is based on the average of the shared energy residual over all MECMs. A clear economic interpretation exists in the method, wherein shared electrical and thermal energy prices can be obtained. Case studies demonstrate the effectiveness of the multi-energy sharing scheme considering integrated demand response (IDR). Moreover, the distributed algorithm can be implemented and converge easily while respecting MECMs' individual benefits and private information.

Automated summary

This study develops an energy sharing strategy supported by the TE mechanism to coordinate interconnected MECMs, using the ADMM algorithm for distributed optimization and economic interpretation of the shared energy scheme. The effectiveness of the method is demonstrated through case studies considering IDR, with easy implementation and convergence while respecting MECMs' individual benefits and private information.