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A Three-Layer Collaborative Optimization Strategy for Virtual Power Plant Based on Multi-Agent Hybrid Game
HAN Xu, SONG Xiaotong, YU Kunyu, LAI Yiming, XU Wenyue
Distributed Energy ›› 2026, Vol. 11 ›› Issue (4) : 29-42.
PDF(1594 KB)
PDF(1594 KB)
A Three-Layer Collaborative Optimization Strategy for Virtual Power Plant Based on Multi-Agent Hybrid Game
To address the challenges of diversified participants in the electricity market and resolve conflicts of interest among multiple virtual power plants (VPPs), this paper proposes a three-layer hybrid game strategy involving the distribution system operator (DSO), virtual power plant operator (VPPO), and user aggregator (UA) to support collaborative optimization of multi-VPP systems. First, a UA coalition is formed by aggregating various flexible resources, including photovoltaic prosumers, electric vehicle charging stations, and integrated energy loads. Next, a three-layer hybrid game model is constructed, encompassing hierarchical energy transactions among DSO, VPPO, and UA, as well as peer-to-peer energy trading among UA entities, structured as a "Stackelberg game - Stackelberg game - cooperative game" framework. Finally, the proposed model is solved using the bisection method, Karush-Kuhn-Tucker conditions, and the alternating direction multiplier method. Case studies demonstrate that the proposed multi-layer hybrid game strategy reduces the operating costs of the photovoltaic prosumer UA and the electric vehicle charging station UA by 4.5% and 15.3%, respectively. Meanwhile, guided by the dynamic pricing mechanism of the DSO, the total profit of the system operators increases by 2.7%. This strategy can effectively balance the interests of multiple stakeholders, optimizing the energy trading and benefit allocation mechanisms among different operators.
flexible resources / virtual power plant (VPP) / hybrid game / user aggregator (UA) / electricity market
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