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Pitch control system of wind mill generator

A wind turbine and control system technology, applied in the control of wind turbines, wind turbines, non-electric variable control, etc., can solve problems such as pollution and complex structures, increase reliability, simplify motor drives, improve safety and reliability effect

Active Publication Date: 2008-11-26
连云港杰瑞电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent No. 02144809.4 discloses a "megawatt-level wind turbine variable speed and pitch control system". Its disadvantage is that the oil leakage of the hydraulic device cannot be avoided, causing certain pollution, and the structure is complicated

Method used

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  • Pitch control system of wind mill generator
  • Pitch control system of wind mill generator
  • Pitch control system of wind mill generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1. refer to Figure 1-Figure 3 . A wind turbine pitch control system,

[0026] It consists of a central control cabinet, several parallel shaft cabinets controlled by the central control cabinet, and a group of DC motors and transmissions controlled by each shaft cabinet independently;

[0027] The central control cabinet includes a PLC control unit and a control interface;

[0028] The shaft cabinet is provided with a motor driver, the motor driver is connected with a protection circuit to drive the DC motor and the transmission device; the shaft cabinet is also provided with a charging circuit connected in parallel with the motor driver, one end of the charging circuit is connected to the central control cabinet, and the other end is connected to the rechargeable battery The rechargeable battery pack is then connected to the protection circuit, and the charging circuit controls the charging of the rechargeable battery pack after the PLC control unit gives i...

Embodiment 2

[0036] Example 2. In Embodiment 1, the position sensor 1 is an encoder 1 , and the position sensor 2 is an encoder 2 .

Embodiment 3

[0037] Example 3. In Embodiment 1, the output gear of the DC motor is further provided with a speed sensor, and the speed sensor feeds back the ω angular velocity signal output by the DC motor to the motor driver for processing to form a speed loop.

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Abstract

The invention relates to a variable propeller pitch control system of a wind driven generator which is characterized in that the variable propeller pitch control system consists of a central control cabinet, a plurality of shaft cabinets connected in parallel and controlled by the central control cabinet as well as a group of DC motors and transmission devices which are singly controlled by each shaft cabinet; the central control cabinet includes a PLC control unit and a control interface. The PLC control unit of the system of the invention realizes the multiple functions of closing the loop at the rotating angle position of a blade, charge control for a battery, controlling the temperature of a box body, fault processing, etc. An upper computer transmits a single position signal to the PLC control unit; when an error does not happen or happens to the position signal, then the PLC control unit considers the error to be a fault and sends out a command duly to adjust the blade to a safe position, namely a feathering position, thereby simplifying the control procedure of the blade and increasing the running reliability of the blade; the driving of the blade is realized by the DC motor; the control characteristic is more stable due to linear control.

Description

technical field [0001] The invention relates to a control system of a wind power generator, in particular to a pitch control system of a wind power generator. Background technique [0002] The wind turbine with variable pitch technology can adjust the pitch angle of the blades through the variable pitch system, optimize the output of the wind rotor, improve the output power characteristics of the wind turbine, and eliminate the influence of air density changes and blade surface roughness on power output . The variable pitch wind turbine can actively reduce the wind pressure on the impeller by fully feathering. It has the advantages of good starting performance, stable output power, small force on the structure of the unit, convenient and safe shutdown, and less difficulty in transportation and lifting. In addition, the blades can be feathered through the pitch control system, which greatly reduces the load on the transmission system under braking conditions when the unit fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00G05D13/00G05B19/05H02J7/00H02J7/32
CPCY02E10/723Y02E10/72
Inventor 陈建华程颖李爱英林海军刘欣村张鹏
Owner 连云港杰瑞电子有限公司
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