Automatic Avoidance Method of High Head, Irregular and Multiple Restricted Areas of Mainstream Cascade Hydropower Station Group

Abstract

The invention relates to the field of hydropower dispatching and operation, in particular to a method for automatically avoiding high-head, irregular and multi-restricted areas of cascade hydropower station groups in main streams. The technical solution is: based on the mathematical definition of the constraints of the restricted area of ​​the unit, the irregular restricted area is segmented by automatic analysis technology based on the Hertel-Mehlhorn convex subdivision algorithm, and then the convex optimization theory is used for the segmented results Modeled with disjunctive programming theory. This method can automatically avoid irregular and multi-restricted areas, achieving the effect of automatic modeling and solving. This method is of great significance for responding to grid differentiation, automatic dispatching applications, and responding to the new situation of frequent changes in hydropower output under market conditions in the future.

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. Background technique [0002] 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 of a sing...

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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