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A method and system for active power control of a wind farm

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: 2020-05-15
CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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  • Summary
  • 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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  • A method and system for active power control of a wind farm
  • A method and system for active power control of a wind farm
  • A method and system for active power control of a wind farm

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Effect test

Embodiment 1

[0067] The first embodiment of the present invention discloses a wind farm active power control method, which is applied to a wind farm active power control system. The flowchart is as follows figure 1 As shown, the active power control method of wind farm includes:

[0068] S101: Collect the active power of the common coupling point of the wind farm by taking a set time as a unit;

[0069] In the process of performing 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 set time unit. Preferably, the set time is 1 second, and the active power control system of the wind farm collects every The active power of the common coupling point of the wind farm is collected every second.

[0070] S102: Calculate the maximum and minimum allowable adjustment of the active power of the wind farm based on the active power of the common coupling point of the wind farm within the preset time and th...

Embodiment 2

[0078] A wind farm active power control method disclosed based on the first embodiment of the present invention, such as figure 1 In the step S102 shown, when the preset time includes the first preset time and the 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 common coupling point of the wind farm within the preset time and the preset maximum change limit of the active power to calculate the specific execution process of the maximum and minimum values ​​of the wind farm's active power that can be adjusted, such as figure 2 As shown, including the following steps:

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

Embodiment 3

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

[0107] The collection module 501 is configured to collect the active power of the common coupling point of the wind farm in a unit of a set time;

[0108] The calculation module 502 is configured to calculate the maximum and minimum allowable adjustment of the active power of the wind farm based on the active power of the common coupling point of the wind farm within the preset time and the preset maximum change limit of the active power;

[0109] The dispatch range adjustment module 503 is configured to adjust the actual dispatch target value to within the range of the minimum allowable adjustment wind f...

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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, the 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 around the world. Wind power has the potential to compete with traditional conventional power generation. It is currently a new energy 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 output of the whole field have greater volatility. After the wind farm receives the active dispatch command from the dispatch center, it needs to allocate th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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