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Output-restricted active power distribution method based on power prediction and applied to wind power plant cluster

A technology for active power and power prediction, applied in wind power generation, single-network parallel feeding arrangement, etc.

Active Publication Date: 2014-11-12
STATE GRID CORP OF CHINA +1
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide an optimal distribution method of wind farm cluster limited output active power based on ultra-short-term power forecasting to solve the problem of reasonable distribution of wind farm cluster active output limit

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  • Output-restricted active power distribution method based on power prediction and applied to wind power plant cluster
  • Output-restricted active power distribution method based on power prediction and applied to wind power plant cluster
  • Output-restricted active power distribution method based on power prediction and applied to wind power plant cluster

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Embodiment Construction

[0051]The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0052] Such as figure 1 Shown is the flow chart of the method of the present invention. First, the ultra-short-term active power prediction information is corrected, and the correction is based on current active power monitoring data and historical active power data. Then, according to the correction information and the maximum allowable output of the active power of the wind farm cluster, it is judged whether the wind farm cluster needs to limit the output. Then, it should be dealt with in two cases: needing to limit the output and not needing to limit the output; for the need to limit the output, it should also be divided into two types: adjustable output and non-adjustable output. After determining the active power distribution, delay for a period of time, continue the active power distribution in the next period, repeat the above process, and the historic...

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Abstract

The invention relates to an output-restricted active power distribution method based on power prediction and applied to a wind power plant cluster. According to the output-restricted active power distribution method based on power prediction and applied to the wind power plant cluster, active output maximization and line loss minimization of the wind power plant cluster existing under the output-restricted condition serve as objective functions, the system safety, the wind power plant output power, the frequent starting and stopping of a wind power unit and the lower predicted power serve as constraint conditions, and the influence of the active power loss on a connecting line and short-term active power prediction errors is considered. According to the output-restricted active power distribution method based on power prediction and applied to the wind power plant cluster, the practicability is high, reduction of the wind curtailment electricity quantity of the wind power plant cluster is achieved by increasing the active output of the wind power plant cluster and lowering the active power loss inside the cluster, and the negative influence on the service life of the unit, the operation of wind power plants and system regulation of the frequent starting and stopping of the wind power unit can be weakened to a certain extent.

Description

technical field [0001] The invention relates to a method for allocating active power with limited output of wind farm clusters based on power prediction. Background technique [0002] With the continuous improvement of wind power technology and the continuous improvement of wind turbine manufacturing level, under the guidance of the national wind power development strategy of "building large bases and integrating into large power grids", the proportion of wind power in my country's power grid is constantly increasing, and it is changing from decentralized to small. Large-scale development, local consumption, and development towards large-scale, highly concentrated development, long-distance, high-voltage transmission. Eight 10 million kW wind power bases in Gansu Jiuquan, Xinjiang Hami, Inner Mongolia, Jilin, and Shandong have been approved and started construction. By 2020, my country will successively build several "Three Gorges of Wind Power". [0003] Correspondingly, du...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46
CPCY02E10/76
Inventor 王世谦于琳琳张丽华田春筝黄景慧
Owner STATE GRID CORP OF CHINA
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