Abstract: Currently, carbon emission trading markets and green certificate trading markets have become important mechanisms for promoting carbon reduction in the power industry. To address the needs of low-carbon transition, this paper proposes an optimized dispatch method for virtual power plants incorporating a coupled carbon-green certificate trading mechanism. The study constructs a dispatch optimization model for multiple resources, aggregating the spatiotemporal flexibility of electric vehicles to form dispatchable power and energy boundaries. It integrates stepped carbon trading with green certificate trading, incorporating them into dispatch objectives and constraints to quantify and balance economic efficiency and environmental sustainability. Through price coordination, the approach enhances renewable energy consumption. Case studies demonstrate that the method effectively balances operational costs, green clearing, and dispatch stability.