Using waste-to-energy plant is one of the main ways of dealing with solid waste. More and more waste-to-energy plants have a combined heat and power model. Plants in this model both heat adjacent areas and sell electricity in the electricity market. Based on this, a two-stage robust trading strategy model of a waste-to-energy combined heat and power (WTE-CHP) plant is constructed considering the uncertainty of the day-ahead market price of electricity and the amount of solid waste. The model can ensure that the expected benefits of WTE-CHP plant are maximized under the worst-case scenario. In order to analyze the model, Benders decomposition is introduced to decompose the model into easy-to-solve main problems and sub-problems. Finally, simulation results show that the model can help operators to formulate economical and reasonable power trading strategies. The superiority and applicability of the model are verified by comparative and sensitivity analysis.

This work is supported by the National Natural Science Foundation of China (No. 71973043).