Wind power field active power control method based on power forecasting information

A power prediction and active power technology, applied in reactive power adjustment/elimination/compensation, wind power generation, reactive power compensation, etc., can solve problems such as reasonable regulation, wind farms cannot achieve online active power, etc.

Active Publication Date: 2012-06-20
STATE GRID ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problem that the existing wind farms cannot reali...

Method used

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  • Wind power field active power control method based on power forecasting information
  • Wind power field active power control method based on power forecasting information
  • Wind power field active power control method based on power forecasting information

Examples

Experimental program
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Effect test

Embodiment 1

[0081] The wind farm active power control method based on the power prediction information of the present invention is used to preferentially adjust the unit capacity to meet the active power adjustment instruction of the power grid dispatching department. The active power command issued by the power grid dispatching department increases from 3MW to 5MW from time t1, so Δ P 2MW, such as figure 2 shown.

[0082] Assume that the grid-connected wind farm has 7 double-fed wind turbines with a single unit capacity of 2MW. Among them, the 7# machine is in the state of maintenance and outage, and the power prediction values ​​of the remaining 6 units in the next hour are as follows: image 3 shown.

[0083] First of all, according to step 3, the units are preliminarily grouped, and units 1#~6# are classified as adjustable units, and unit 7# is classified as non-adjustable units.

[0084] In the next step, further divide the adjustable units according to step four. according to ...

Embodiment 2

[0088] The wind farm active power control method based on the power prediction information of the present invention is used to preferentially adjust the unit capacity to meet the active power adjustment instruction of the power grid dispatching department. The active power command issued by the power grid dispatching department increases from 3MW to 7.5MW from time t1, so Δ P 4.5MW, such as Figure 4 shown.

[0089] Assume that the grid-connected wind farm has 7 double-fed wind turbines with a single unit capacity of 2MW. Among them, the 7# machine is in the state of maintenance and outage, and the power prediction values ​​of the remaining 6 units in the next hour are as follows: image 3 shown.

[0090] First of all, according to step 3, the units are preliminarily grouped, and units 1#~6# are classified as adjustable units, and unit 7# is classified as non-adjustable units.

[0091] In the next step, further divide the adjustable units according to step four. according ...

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Abstract

The invention discloses a wind power field active power control method based on power forecasting information, wherein the control method comprises the following steps: firstly, pre-treating wind power forecasting information; secondly, calculating the power regulating amount of a wind power field; thirdly, formulating a preliminary distribution scheme of a wind generation set group; fourthly, formulating an optimized distribution scheme of the wind generation set group; fifthly, selecting a regulating machine group; sixthly, distributing the power regulation amount of the wind power field; and seventhly, determining the control time delay and triggering the next control. According to the invention, wind generation sets are grouped reasonably according to the ultra-short-term wind power forecasting information and short-time power forecasting information, the active power distribution scheme of the wind power field within a certain confidence interval is formulated accurately, the unified planning and control for the active power of the wind power field are realized, the regulating times of the wind generation sets can be reduced, and the influences of frequency regulation on the service lives of the wind generation sets are reduced.

Description

technical field [0001] The invention relates to a wind farm active power control method based on power prediction information, and belongs to the technical field of wind farm control in new energy power generation technology. Background technique [0002] In recent years, domestic wind power has developed rapidly. As of the end of 2010, the total installed capacity of wind power in China has exceeded 40 million kilowatts. Especially in some key wind power development areas, the proportion of installed wind power capacity is similar to that of developed wind power countries in the world. The connection of such large-scale wind power to the power grid will bring new problems and challenges to the safe and stable operation of the power grid. In order to enable the coordinated development of wind power and the power grid, some domestic scholars and experts have proposed the concept of "grid-friendly" wind farms . The so-called "grid friendly" means that wind farms should be as ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/18
CPCY02E10/763Y02E40/30Y02E10/76
Inventor 陈宁朱凌志陈梅吕宏水
Owner STATE GRID ELECTRIC POWER RES INST
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