Abstract: The supply and demand relations of electricity and tradable green certificate（TGC）among renewable energy generators,conventional energy generators and power sale companies are analyzed. Then,an energy economic dispatching model considering TGCis established with the goal of maximizing the generators’ benefits,and the power dispatching and TGC trading strategies of powerproducers under the consumption guarantee mechanism are solved. An example is given to illustrate the effectiveness of the TGCmechanism to improve the profitability of renewable energy generators,and the consumption responsibility weight plays an importantrole in the benign operation of the market,such as the change of TGC price and the suppression of market power.