Drawing upon Xinjiang’s resource endowment and regional advantages, this study focuses on advancing Xinjiang’s green power development trajectory within its power grid while facilitating a seamless transition towards a unified regional power market. Specifically, it explores a collaborative trading approach for both green power generation and associated certificates within a shared marketplace. To address challenges related to valuing renewable energy’s environmental benefits across diverse electric energy/equity transactions, we propose a cooperative framework encompassing both electric energy transactions as well as green certificate trades within this regionally integrated marketplace. While maintaining provincial autonomy over electricity transactions, local grid operators will oversee intra-provincial sales/purchases via non-cooperative strategies within this broader context. Furthermore, an allocation mechanism based on generalized Nash bargaining games will be employed for determining environmental values associated with traded green electricity certificates at this level. Ultimately, we present a comparative case study demonstrating how our proposed trading model can effectively drive increased consumption of renewable energy while also examining its impact on decision-making among participants operating under specific sending/receiving quotas within this integrated marketplace.