A non-real-time rolling correction method for hydropower stations considering wind power prediction error

Abstract

The invention discloses a hydropower station non-real-time rolling correction method considering a wind power prediction error, and the method comprises the steps: calculating a cascade hydropower station net load curve after the wind power is changed according to a system remaining period load task and a current wind power prediction result; if the net load of the next time period calculated in the current time period is smaller than the net load calculated in the previous time period, if the high-water-level power station set is not a null set, increasing the output of the high-water-level power station to reduce the output of the relatively low-water-level power station, and if the high-water-level power station set is a null set, reducing the output of the low-water-level power stationto increase the output of the relatively high-level power station; and if the net load of the next time period calculated in the current time period is increased compared with the net load calculatedin the previous time period, if the low-water-level power station set is an empty set, increasing the output of the high-water-level power station to reduce the output of the relatively low-water-level power station, and if the low-water-level power station set is not the empty set, reducing the output of the low-water-level power station to increase the output of relatively high-level electricity. The reservoir capacity compensation adjusting benefit of the cascade hydropower station is fully utilized.

Description

technical field [0001] The invention relates to the technical field of hydropower dispatching, and more specifically, relates to a non-real-time rolling correction method for hydropower stations considering wind power prediction errors. Background technique [0002] At present, in the joint dispatching operation of wind-hydropower system, decision makers often focus on the safe and stable operation of the power system while ignoring the operation response process of hydropower stations. The hydropower station completes the planned electricity issued by the grid, and even has a bad impact on the safe and economic operation of the hydropower station. [0003] In the existing wind-hydropower system joint dispatching, the power grid usually issues the next day's time slot plan to the hydropower station according to the load forecast and wind power forecast curve. When the actual wind power is greater than the predicted wind power, in order to meet the load balance demand of the...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to solve the problem that the joint dispatch of the existing wind-hydropower system does not take into account the long-, medium- and short-term prediction results of wind power to have different degrees of deviation, which leads to the easy occurrence of the end-of-period water level and the safe water level of hydropower station dispatching in the actual operation process. Serious mismatching problems, which in turn affect the hydropower station to complete the planned electricity issued by the grid, and even technical problems that have a bad impact on the safe and economic operation of the hydropower station

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