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Wind farm active power control method and system

A technology of active power and control method, which is applied in the field of wind farm active power control methods and systems, can solve problems such as the maximum change limit of wind farm active power exceeding the limit, and achieve the effect of satisfying safe and stable operation

Active Publication Date: 2017-11-14
CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a wind farm active power control method and system to solve the problem that the maximum change limit of wind farm active power exceeds the limit and meet the requirements of power system safety and stability

Method used

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  • Wind farm active power control method and system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A wind farm active power control method disclosed in Embodiment 1 of the present invention is applied to a wind farm active power control system. The flow chart is as follows figure 1 As shown, the active power control methods of wind farms include:

[0068] S101, collecting the active power of the public coupling point of the wind farm in units of set time;

[0069] In the process of executing step S101, the active power control system of the wind farm collects the active power of the common coupling point of the wind farm according to the preset setting time. Preferably, the setting time is 1 second, and the active power control system of the wind farm The active power of the public coupling point of the wind farm is collected every second.

[0070] S102. Calculate the maximum and minimum values ​​of active power of the wind farm that are allowed to be adjusted based on the active power of the common coupling point of the wind farm within a preset time and the preset...

Embodiment 2

[0078] Based on the method for controlling the active power of a wind farm disclosed in the first embodiment of the present invention, as figure 1 In step S102 shown, when the preset time includes a first preset time and a second preset time, the first preset time is 60 seconds, the second preset time is N minutes, and the value of N is greater than 1 , based on the active power of the public coupling point of the wind farm within the preset time and the preset maximum change limit of active power, the specific execution process of calculating the maximum and minimum active power of the wind farm that is allowed to be adjusted is as follows: figure 2 shown, including the following steps:

[0079] S201. Obtain the first active power of the common coupling point of the wind farm 60 seconds ahead, and use the sum of the first active power and the maximum change limit of the first active power preset in the previous 60 seconds as the wind power that is allowed to be adjusted in t...

Embodiment 3

[0106] Based on the wind farm active power control methods provided by the above-mentioned embodiments of the present invention, the third embodiment of the present invention discloses a wind farm active power control system that implements the above-mentioned wind farm active power control method, and its structural diagram is as follows Figure 5 As shown, the wind farm active power control system 500 includes:

[0107] The collection module 501 is used to collect the active power of the public coupling point of the wind farm in units of set time;

[0108] Calculation module 502, configured to calculate the maximum and minimum values ​​of active power of the wind farm that are allowed to be adjusted based on the active power of the common coupling point of the wind farm within a preset time and the preset maximum change limit of active power;

[0109] The scheduling range adjustment module 503 is used to adjust the actual scheduling target value to the range of the minimum a...

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Abstract

The present invention discloses a wind farm active power control method and system. According to the wind farm active power control system, the active power of a wind farm common coupling point is collected with set time adopted as a unit; a wind farm active power maximum value and minimum value which are allowable for adjustment are calculated according to the active power of the wind farm common coupling point in preset time and a preset active power maximum change limit value; an actual scheduling target value is adjusted to be in a range from the wind farm active power minimum value allowable for adjustment and the wind farm active power maximum value allowable for adjustment according to a received scheduling target value; and a control instruction carrying an active power uniform-speed change state is sent to a wind generating set. With the wind farm active power control method adopted, the problem of the exceeding of an active power maximum change limit value of a wind farm can be solved, and requirements for safe and stable operation of a power system can be satisfied.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method and system for controlling active power of a wind farm. Background technique [0002] Due to global climate change, greenhouse effect and other environmental problems are becoming more and more serious, the development and use of green renewable energy has attracted people's attention. In recent years, wind power has developed rapidly all over the world. Wind power has the potential to compete with traditional conventional power generation. It is currently a new and renewable energy with the most development and utilization value and the most mature technology. [0003] Since the wind power generation capacity is determined by the wind resources, the output of a single wind turbine and the wind power of the whole field has large fluctuations. After receiving the dispatching center’s active power dispatching instructions, the wind farm needs to distribute th...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/48
CPCH02J3/386H02J3/48Y02E10/76
Inventor 唐娟刘瑾杨东海韩花丽张波刘杰
Owner CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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