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

A technology of wind-storage combination and dispatching method, which is applied in the direction of wind power generation, single-network parallel feeding arrangement, etc., can solve the problems of less direct impact research on system economy, reduce the operation economy of thermal power units, and low power generation costs, etc. To achieve the effect of improving the dispatchability of wind power and improving the utilization rate of wind power

Inactive Publication Date: 2016-01-06
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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

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Embodiment 1

[0050] A wind-storage combined system scheduling method that improves the dispatchability of wind power, see figure 1 , the method includes the following steps:

[0051] 101: Calculate the available dispatching output of the combined wind-storage system based on the power state of the battery at the current moment and the predicted output of wind power;

[0052] 102: Based on the available dispatching output, establish a dispatching model including the combined wind-storage system, and the dispatching model consists of objective functions and constraints;

[0053] 103: Use the objective function as the bacterial fitness value, and combine the improved bacterial foraging algorithm to solve the scheduling model;

[0054] 104: If the solution result satisfies all the constraint conditions, take the solution result as the optimal solution, and output the optimal solution.

[0055] Wherein, the constraints in the above step 102 include:

[0056] Power balance constraints, therma...

Embodiment 2

[0073] The scheme in embodiment 1 is described in detail below in conjunction with specific calculation formulas and examples, see the following description for details:

[0074] 201: Calculate the available dispatching output of the combined wind-storage system based on the power state of the battery at the current moment and the predicted output of wind power;

[0075] When the predicted output of wind power is higher than a certain upper limit (that is, a certain percentage of the installed capacity of wind power) under a certain confidence level, the upper limit is used as the available dispatching output of the wind-storage combined system during this period, and the excess electric energy of the battery is Charge.

[0076] If the battery cannot store all the electric energy due to the limitation of the maximum charging capacity or the charging speed during this period, the excess electric energy will be unloaded through the unloader (abandoning the wind).

[0077] When ...

Embodiment 3

[0156] The following is combined with the specific process figure 2 The scheme in embodiment 1,2 is described in detail:

[0157] 301: Data initialization, and calculation of available scheduling output of wind storage in the current cycle;

[0158] Among them, the steps of data initialization specifically include: reading the upper limit of chemotaxis, copying, and dispersing times, the load value of the current cycle, the predicted output value of wind power, the current stored power of the battery, the upper and lower limits of the output of each unit, and the climbing value. Power system parameters such as slope constraints, the bacterial state is initialized through the above parameters.

[0159] Based on the current state of battery power and the predicted output of wind power in this period, the available dispatching output of the combined wind-storage system in this period is calculated.

[0160] 302: Obtain the corresponding objective function value for the initial...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46
CPCY02E10/76
Inventor 陈厚合李国庆张儒峰姜涛李扬辛业春王振浩李卫国王鹤
Owner NORTHEAST DIANLI UNIVERSITY
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