Power generation plan curve decomposition and settlement method and system considering medium-and-long-term contracts

The invention provides a power generation plan curve decomposition and settlement method and a system considering medium and long term contracts, and the method comprises the steps: calculating a contract execution electric quantity plan of a power plant according to the obtained medium and long term contract information and power plant operation information of the power plant; calculating a market clearing result according to the contract execution electric quantity plan, the power plant operation information, a preset scheduling operation target and a preset constraint condition; decomposingthe contract execution electric quantity plan and calculating to obtain a medium-and-long-term contract settlement curve; and finally, calculating the settlement amount of the power plant according to the medium-and-long-term contract information, the contract execution electric quantity plan, the market clearing result and the medium-and-long-term contract settlement curve. According to the method, the medium-and-long-t