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Variable-pitch control circuit of wind generating set and working method of variable-pitch control circuit

A technology for wind turbines and control circuits, which is applied in the control of wind turbines, wind turbines, and wind power generation. It can solve the problems of large wind turbine vibration, slow deceleration, and low control accuracy, and achieve the effect of reducing the vibration amplitude.

Inactive Publication Date: 2012-10-03
CHENGDU FORWARD TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing pitch control technology mainly has the following technical problems: because the PLC module drives the blades in place at one time according to the set angle output by the main control unit, resulting in large vibration of the fan
In the deceleration stage before stopping, the deceleration is too slow, which will affect the control effect
[0007] Finally, the control accuracy is not high
At present, the control accuracy of the existing technology can only reach 0.02°, and its power generation quality is sometimes not ideal. In order to improve the power generation quality, it is necessary to further improve the blade control accuracy

Method used

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  • Variable-pitch control circuit of wind generating set and working method of variable-pitch control circuit
  • Variable-pitch control circuit of wind generating set and working method of variable-pitch control circuit

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Embodiment Construction

[0062] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0063] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0064] Such as figure 2 It is the block diagram of pitch control circuit. Taking the control circuit of one of the blades as an example, the wind turbine pitch control circuit includes a PID unit, a driver, a motor, an acceleration control unit, an encoder, and an adder, and also includes a displacement continuous control unit; the displacement continuous On the one hand, the control unit receives the set angular displacement value P output...

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Abstract

The invention discloses a variable-pitch control circuit of a wind generating set and a working method of the variable-pitch control circuit, and relates to the field of electric control, in particular to a variable-pitch control circuit and a control mode of the wind generating set. The invention has the technical point that an angle set value P outputted by a main control unit is decomposed into a plurality of small angle values rp and outputted at a plurality of working periods. The variable-pitch control circuit has the advantages of steady output of a control speed curve, rapid system response and high control precision and is mainly used for controlling the variable pitch of the wind generating set.

Description

technical field [0001] The invention relates to the field of electric control, in particular to a pitch control circuit and a control method of a wind power generating set. Background technique [0002] With the society's sharp demand for energy, the wind power industry, as a renewable clean energy, has developed rapidly in recent years. In order to make better use of wind energy, the single-unit capacity of wind turbines is getting larger and larger, and the control method has also changed from a simple fixed-pitch stall control mode to a variable-pitch control mode. [0003] Pitch change means that the blades of the fan are automatically rotated to the angle set by the main controller following the direction and size of the wind, so as to control the windward angle of the blades to always remain at the optimal position, so as to make better use of wind energy. Pitch control is already an essential system in megawatt wind turbines. Due to the huge size of megawatt wind tur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 袁旭宏苗强张宇行
Owner CHENGDU FORWARD TECH
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