Under the background of dual carbon target and power system transformation, the trading strategy of power generation enterprises will change significantly. Based on the implementation of renewable energy quota system, the optimal decision for power generation enterprises to participate in the electricity market is explored by considering both the carbon emission right market and the green license market comprehensively. Firstly, the market structure of market participants' participation in transactions under the condition of multiple policies is set up to clarify the relationship between supply and demand in each market. Then, the profit functions of power generation enterprises are established. Taking the goal of maxing the profits of power generation enterprises, the optimal production and trade model of enterprises is established under the non-cooperative game and co-operative game respectively. Finally, an example is given to verify the transaction model and provide a basis for power generation enterprises to participate in electricity market transactions under the influence of various policies.