Super-large scale hydropower station group short period practical scheduling method

Abstract

The invention belongs to the water power scheduling operation field, and relates to a super-large scale hydropower station group short period practical scheduling method; the method divides all hydropower stations into three types according to scheduling characteristics including system hierarchy, space attributes, task requirements and plan particularity, and proposes an abandoned water correction strategy based on pitch peak response and a valley period load balancing reduction strategy, thus realizing checking analysis and output adjustment of power stations of a fixed scheduling mode; forcascade hydropower stations of middle and small rivers, the method takes the total output process as control conditions, uses the minimum total power consumption as an object, thus optimizing load distribution among the cascade hydropower stations; for large scale river cascade hydropower stations, the method builds a pitch peak scheduling model, proposes a balance power station equal load factorscheduling method, thus realizing system pitch peak response and all time load balance. The method can fast provide a reasonable water power scheduling result, thus satisfying power grid real operation timeliness and practicality requirements, and providing a new technical path for effectively solving super-large scale hydropower system scheduling problems.

Description

technical field [0001] The invention relates to the field of hydropower dispatching and operation, in particular to a short-term practical dispatching method for ultra-large-scale hydropower station groups. Background technique [0002] The large-scale development of China's hydropower has achieved a qualitative leap. In the Lancang River, Jinsha River, Yalong River, Hongshui River and other large watersheds, a group of giant cascade hydropower stations with a level of over 10 million kilowatts have been formed. Interconnection constitutes a super-large-scale hydropower system, and a high-proportion hydropower provincial power grid and a 100-million-kilowatt regional power grid with an installed capacity of over 80 million kilowatts have emerged. Same day. The solution scale of cascade hydropower stations in super-large river basins is huge, and the problem of dimensionality disaster is prominent, and most of them are high-head and giant generating units, which not only fac...

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Problems solved by technology

Barros and Zambon conducted optimal scheduling modeling for more than 100 hydropower stations in Brazil, and constructed linear programming and nonlinear programming models. However, this research is mainly based on long-term planning, and many simplifications have been made to use commercial software such as MINOS and CPLEX The solution, timeliness and accuracy of the results are difficult to meet the needs of more complex short-term practical dispatching operations; there are many public reports that carry out research on the optimal dispatching of hydropower station groups from the aspect of algorithms, and put forward effective dimensionality reduction methods and methods combined with different ideas. strategy, a simulation analysis of cascade hydropower systems in some large watersheds was carried out

Generally speaking, the existing results, as forward-looking basic research, have expanded the calculation scale, improved the calculation speed and accuracy, but when facing the problem of solving ultra-large-scale hydropower systems, the "curse of dimensionality" is still inevitable. In particular, pure mathematical optimization research results are mostly classified as strategy-oriented solutions in actual production, which lacks practicability. At present, practical research on the combination of scheduling plans with actual production operations is relatively rare.

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