Energy Decomposition of Long and Middle Term Contract in Multi-Energy System

With the development of power market and large-scale renewable energy(RE) integration into power system in China, the execution planning of long and middle term energy contract has great challenges due to a high proportion of contract power and uncertainty of RE generation. To decrease the risk of unfinished contract or RE abandonment caused by the characteristics of different power types, the relative equilibrium contract completion rate that can be extended to all types of power plants is introduced in the basic decomposition model of energy contract. Then, the start-up and shutdown of thermal power plant in a short-time period are considered in the energy decomposition model of monthly contract. Further, in order to consider the uncertainties of new energy, chance constraints are introduced in the model. Finally, a numerical example based on a real system of a province of China verifies the reasonableness of the proposed model.