Combined water and fire scheduling method of considering optimal abandoned water of cascade hydropower stations

Abstract

The invention discloses a combined water and fire scheduling method of considering optimal abandoned water of cascade hydropower stations. The method comprises the steps of: 1) collecting all output parameters of the hydropower stations and thermal power stations, and uploading the same to a scheduling center, wherein the parameters include climbing rates of the thermal power stations, output of the hydropower stations and the thermal power stations, storage outflow of the hydropower stations, water levels, water storage capacity, abandoned-water flow and the like; 2) fitting function relationships among upstream water levels, the water storage capacity, downstream water levels, the storage outflow and the like by the scheduling center; 3) establishing an optimal-abandoned-water model of the cascade hydropower stations and a power generating cost minimization model of combined water and fire scheduling; and 4) calculating optimal output parameters of the hydropower stations and the thermal power stations, formulating an optimal scheduling plan, and issuing scheduling instructions to adjust the output parameters of the hydropower stations and the thermal power stations. According tothe method of the invention, a water resource allocation strategy of combining the optimal abandoned water and forced abandoned water is adopted, the abandoned-water characteristics of the cascade hydropower stations are utilized, water resource utilization maximization is realized, thermal power generation costs are reduced, complementary running of hydropower and thermal power is realized, andeconomy of system running and a utilization rate of water resources are improved.

Description

technical field [0001] The embodiments of the present invention belong to the field of power grid power generation dispatching, and in particular relate to a water-fired joint dispatching method considering optimal water abandonment of cascade hydropower stations. Background technique [0002] Cascade hydropower stations are the main form of water resources utilization in most areas of China, but the problem of water abandonment in cascade hydropower stations is very serious and the economic loss is huge. Factors affecting water abandonment include load mismatch, automatic power generation control input, low power consumption period, etc., but the unreasonable method of water abandonment is the most critical factor. At present, the forced water abandonment strategy is widely used, focusing on the single hydropower station abandonment water, and it is difficult to realize the reuse of the abandoned water in cascade hydropower stations, so it is impossible to maximize the bene...

AI Technical Summary

Problems solved by technology

At present, the strategy of forced water abandonment is widely used, focusing on the water abandonment of a single hydropower station, and it is difficult to realize the reuse of abandoned water in cascade hydropower stations, so it is impossible to maximize the benefits of water resource utilization

Images