1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University), Chongqing 400044, China;2.State Grid Urumqi Electric Power Supply Company, Urumqi 830000, China

The boundaries of dispatchable resources are expanded when the multi-energy system participates in power dispatch, which helps improve energy utilization efficiency. To deal with the difficulty in collaborative optimal calculation caused by the nonlinear characteristics of the multi-energy system model, and the difficulty in order issuing caused by the privacy protection and participation threshold, a depiction and aggregation method of replacement constraints for the flexible regulation capability is studied. First, aiming at the difficulty in feasibility assurance caused by the non-convex characteristics of a single energy subsystem, the inscribed convex approximation depiction method of the flexible regulation capability based on the boundary inward modification is proposed. Then, aiming at the difficulty in considering the juggling aggregation calculation accuracy and efficiency of flexibility regulation capability for multi-energy system clusters, the accurate and efficient aggregation method of flexible regulation capability based on generalized zonotopes is proposed. For the polynomial-zonotope-type generalized zonotopes, the transformation and inverse transformation strategy of flexible regulation capability is proposed. Finally, the simulation results show that the proposed method ensures the feasibility of alternative constraints and greatly improves the calculation accuracy on the premise of meeting the requirements of operation dispatch time window.