Wind-storage combined system scheduling method and apparatus capable of improving wind power schedulability

Abstract

The invention discloses a wind-storage combined system scheduling method and apparatus capable of improving the wind power schedulability. The scheduling method includes: the available scheduling output of a wind-storage combined system is calculated via the current charge state of a storage battery and the wind power prediction output; a scheduling model containing the wind-storage combined system is established, and the scheduling model is formed by a target function and restriction conditions; the target function serves as the bacteria fitness value, an improved bacteria foraging algorithm is employed to solve the scheduling model; and if the solution result satisfies all the restriction conditions, the solution result is the optimal solution and is outputted. The scheduling apparatus comprises a calculation module, an establishing module, a solution module, and an output module. According to the method and the apparatus, based on an operation strategy of the wind-storage combined system, the scheduling model of the wind-storage combined system is established, the improved bacteria foraging algorithm is improved for solution, the economy of the operation of the wind-storage combined system is fully considered, the wind power schedulability is effectively improved, the wind power utilization rate is increased, and the method and the apparatus are applicable to the coordination scheduling of the wind-storage combined system.

Description

technical field [0001] The invention relates to the technical field of power system analysis and dispatching, in particular to a dispatching method and device for a combined wind storage system that improves the dispatchability of wind power. Background technique [0002] In recent years, due to increasingly severe environmental problems, renewable energy power generation technology has developed rapidly. As the most mature and largest renewable energy power generation technology, wind power has rapidly increased its installed capacity worldwide. [0003] With the continuous increase of the proportion of wind power in the power grid, the intermittent, random, fluctuating and anti-peaking characteristics of wind power, accompanied by wind power output forecast errors, have brought great challenges to dispatching based on power controllability and load predictability. Planning created serious challenges. In the actual system, due to the constraints of peak shaving capacity an...

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Problems solved by technology

[0004] At present, in the dispatching of power systems including large-scale wind power, it is generally considered that the total power generation cost or power purchase cost is the smallest, which usually includes the operating cost of thermal power units and environmental protection costs. However, there are few studies on the direct impact of large-scale wind power on the system economy.

Wind power does not consume fossil energy, and the cost of power generation is low. On the one hand, it can reduce the total power generation cost of the system, but on the other hand, its large-scale connection will compress the output of thermal power units and reduce the operating economy of thermal power units.

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