The invention relates to a
hydropower station group monthly transaction plan electric quantity
decomposition method considering
power grid section constraints, and belongs to the technical field of
hydropower dispatching operation. According to the method, the monthly transaction plan electric quantity
decomposition scheme of the
hydropower station group can be quickly determined by adopting the multi-dimensional
search algorithm by taking minimum
water consumption in the scheduling period as a target and considering the main transmission section control limit of the
power grid. Firstly, monthly transaction plan electric quantity of each
power station is extracted, and a hydropower
station group
water consumption minimum model considering
power grid transmission section limitation is constructed; secondly, a multi-dimensional
search algorithm is constructed from three dimensions of time, a
power station and a feasible region, a check correction strategy is introduced for power grid section limit constraints, namely, loosening is performed, and then optimization calculation is performed, whether the output of each section violates the constraints one by one according to an optimization result is checked, and if the output violates the constraints, an equal proportion reduction and load transfer strategy are adopted to ensure that section
safety constraints are met. The power generation
water consumption of the
system can be effectively reduced, and a technical thought is provided for medium-and-long-term transaction plan execution in a
power market environment.