Automatic avoiding method for high-water-head irregular multi-limiting areas of main stream cascade hydropower station group

Abstract

The invention relates to the field of hydropower dispatching operation, in particular to an automatic avoiding method for a high-water-head irregular multi-limiting area of a main stream cascade hydropower station group. According to the technical scheme, on the basis that mathematical definition is carried out on constraint of a unit limiting area, automatic analysis technology subdivision is carried out on an irregular limiting area through a Hertel-Mehlhorn-based convex subdivision algorithm, and then modeling is carried out on a subdivision result through a convex optimization theory and adisjunction planning theory. According to the method, irregular multi-limit areas can be automatically avoided, and the effects of automatic modeling and solving are achieved. The method has important significance for responding to power grid differentiation and automatic dispatching application in the future and responding to the new situation of frequent change of hydropower output under the market condition.

Description

technical field [0001] The invention belongs to the field of hydropower dispatching and operation, and relates to a method for automatically avoiding high-head, irregular and multi-restricted areas of cascade hydropower station groups in main streams. [0002] technical background [0003] Over the past 20 years, my country has concentratedly built giant cascade hydropower stations in the southwest, represented by the Jinsha River, Lancang River, Yalong River, Wujiang River, Dadu River, Hongshui River and other mainstream cascade hydropower station groups, with high water head, large capacity, Huge units, transport distances, and trans-provincial and trans-regional transportation are the fundamental characteristics different from the previous small and medium-sized watersheds. Due to the high-pressure transient flow, these cascade giant hydropower stations generally have multiple irregular unit restriction areas. When a hydropower station or unit responds to the load demand o...

AI Technical Summary

Problems solved by technology

Due to the high-pressure transient flow, these cascade giant hydropower stations generally have multiple irregular unit restriction areas

When a hydropower station or unit responds to the load demand of a single or even multiple receiving end grids and the output of hydropower fluctuates frequently after the marketization of hydropower, due to the close hydraulic connection between the hydropower station periods and between the upstream and downstream of the cascade, it is easy to cause the subsequent period of the hydropower station itself and the upstream and downstream of the cascade. Cascading changes in the output, water head and flow of hydropower station groups have brought great difficulties to the operation of hydropower stations and cascade hydropower station groups, seriously affecting the safe and economical operation of hydropower stations and power grids, and becoming a technical bottleneck restricting the safe and economical operation of hydropower in Southwest China

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