Abstract: Under the "double carbon" target,the uncertainty of new energy output has intensified the fluctuation of power grid prices.In view of the uncertainty of spot prices and power load,under the premise of satisfying network topological constraints,a multi-time scale multi-type trading coupling modeling was established,which comprehensively considers spot market trading,bilateral contract,and option contract trading.Moreover,the uncertainty risk assessment method based on credibility theory was derived. On this basis,the fuzzy opportunity constraints representing uncertainty risks were transformed into deterministic constraints by using clear equivalent classes,and a multi-time scale robust trading strategy model for power grid operators under multiple uncertainties was proposed.Simulations were carried out on the improved IEEE 33-node distribution network,and the results verify the effectiveness of the proposed model in hedging multiple uncertainty risks in power market transactions.The risk avoidance factor can quantify the uncertainty of market transactions,and multi-time scale and multi-type trading can improve the economic and robustness of the system,providing a new idea for power grid operators’ market decision-making and risk assessment.