Multi-power-grid-oriented hydropower station short period peak load regulation characteristic value searching method

Abstract

The invention discloses a multi-power-grid-oriented hydropower station short period peak load regulation characteristic value searching method, and belongs to the technical field of hydroelectric energy optimized operation and electrical power system electricity generation optimized dispatching. With the maximal and minimal values of each electricity receiving power grid residual load as a characteristic value, the output at the period of time of the characteristic value is adjusted gradually in a characteristic value limit range, and the electricity receiving process of each power grid is corrected gradually in order to meet the hydropower station operation limit requirement. Multi-power-grid short period peak regulation is divided into two scheduling modes of a non-abandoned water mode and an abandoned water mode according to available water quantity of a scheduling period. Under the non-abandoned water mode, based on the consideration of power grid typical load characteristic and peak regulation requirement, under the precondition that a lower course comprehensive water usage demand is met, hydropower station peak regulation capacity gain is exerted as much as possible, more electricity is generated at electricity utilization peak and less electricity is generated at electricity utilization valley; under the abandoned water mode, the hydropower station is in fully loaded running, under the requirement of appointed power grid distribution ratio, with minimal rest load variance as a target, a power grid electricity receiving plan is made by a classical particle swarm optimization algorithm.

Description

Technical field [0001] The invention belongs to the technical field of optimized operation of hydropower energy and optimized dispatching of power generation of a power system, and more specifically, relates to a method for searching the short-term peak shaving characteristic value of a hydropower station facing multiple power grids. Background technique [0002] Large-scale hydropower stations currently under construction or in operation, such as Xiluodu, Xiangjiaba, Ertan Hydropower Station, etc., all transmit power to multiple provincial power grids at the same time. However, due to the load level, peak and valley occurrence periods, and peaks of each provincial power grid, The valley difference is different. These hydropower stations need to fully consider the load characteristics of each power grid when formulating their output plans to dynamically respond to the peak regulation requirements of each power grid. [0003] The current short-term peak shaving of hydropower station...

AI Technical Summary

Problems solved by technology

However, these methods perform power balance calculations by limiting the peak-shaving capacity of each power grid by the hydropower station. Although the superimposed total output meets the upper limit of the output of the hydropower station, it limits the peak-shaving capacity of the hydropower station, and each power grid is not satisfied. peak shaving effect

And because the power generation capacity of the hydropower station is limited and the output is limited by the requirements of safe and stable operation and the constraints of the ramp rate, if the power generation of the hydropower station is only calculated according to the power distribution ratio of the power grid, when the peak sections of several power grids overlap, It is easy to cause the output curve obtained after superimposition to not meet the actual operation requirements of the hydropower station

Therefore, when dealing with the peak-shaving problem of multiple power grids in hydropower stations, the current method is difficult to fully utilize the peak-shaving capacity benefits of hydropower stations, and cannot take into account the load characteristics and peak-shaving requirements of multiple power grids.

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