A short-term planning method for multi-level cascaded storage groups with one storage for peak load regulation

Abstract

The invention relates to the field of power grid planning and dispatching operation, in particular to a short-term planning method for one-storage multi-level cascaded storage groups undertaking peak-shaving tasks. First, according to the distribution characteristics of the power grid load curve, the fuzzy semi-step membership function is used to divide the peak and valley periods, and the peak-to-valley ratio of the power station is adjusted to determine the typical peak-shaving curve of the power station; then, the particle swarm optimization algorithm is used to solve the process of power distribution between plants; finally, the calculation process In order to reduce the occurrence of abandoned water, the adjustment strategy of abandoned water is adopted to correct the output process of each power station to minimize the abandoned water. The method of the invention realizes output matching of upstream and downstream power stations, balances the relationship between peak regulation and energy storage, and improves the problem of poor timeliness caused by complex constraints in short-term peak regulation. The method of the invention has a clear principle, is easy to operate and has high calculation efficiency, and provides a practical new idea for solving the actual project scheduling problem.

Description

technical field [0001] The invention relates to the field of power grid planning and dispatching operation, in particular to a short-term planning method for one-storage multi-level cascaded storage groups undertaking peak-shaving tasks. [0002] technical background [0003] The ever-increasing load peak-to-valley difference and the continuous production of intermittent energy sources have brought huge peak-shaving pressure to the short-term dispatching of the power grid. As a high-quality peak-shaving power source, hydropower plays an important role in ensuring the safe, stable and economical operation of my country's power system. play an increasingly important role. Most of the river basins in my country adopt the "one reservoir multi-stage" or "multi-reservoir multi-stage" development, that is, there are one or more leading power stations with good regulation capacity in the upstream, and multiple power stations with small storage capacity, high water head and poor regula...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a short-term planning method for one-storage and multi-level cascade storage group undertaking peak-shaving tasks, and to propose a "one-storage and multi-level" method based on fuzzy identification of "peak and valley periods" and improved cascade energy storage A rapid generation method for the short-term peak-shaving plan of cascade hydropower station groups, in order to reasonably arrange the power generation plan of the upstream and downstream power stations, balance the relationship between peak-shaving and energy storage, and solve the problem that the mathematical planning method is not time-sensitive

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