By installing the heat accumulator

a combined heat and power (CHP) plant is able to effectively reduce its power output in valley load hours of heating period for accommodating curtailed wind power. But the operation strategy of the heat accumulator should be made by centralized dispatching in China at present so that the potential of accommodating wind power by heat accumulator can be brought into full play. In order to take the uncertainty of wind power into account

a CHP dispatch model based on scenario analysis is built to get the operation strategy of heat accumulator. Further

a simpler but practical method is designed as a substitute of the model. The numerical examples have verified the effectiveness of the two methods

showing that the operation strategies of heat accumulator obtained by two methods are almost the same. So the practical method can well be used to replace the multi-scenarios model to get the optimal operation strategy of the heat accumulator. This work is supported by National Natural Science Foundation of China (No. 51107007).