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Wind turbine pitch system

A technology of pitch control system and relay, which is applied in the direction of wind power generation, wind engine, wind engine control, etc. It can solve the problems of poor effect and achieve good protection effect

Inactive Publication Date: 2011-04-13
SUZHOU NENGJIAN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the existing wind power generation pitch systems only use some simple 24V through signals as protection, and the effect is poor when encountering 24V short-circuit and other situations.

Method used

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Embodiment Construction

[0013] The specific implementation manner of the present invention will be described below by way of example with reference to the accompanying drawings.

[0014] The invention discloses a pitch-changing system for wind power generation.

[0015] Such as figure 1 As shown, an overspeed relay 10 needs to be added in the wind power generation pitch system in the present invention, and the +24VDC signal voltage from the main control enters the overspeed relay 10 through the heavy-duty plug 11 and the overvoltage protector 12, and the overspeed relay 10 Accept the safety signal from the internal PLC of the pitch control system, the safety signal can be pulse, square wave, analog (such as 0--±10V, 4--20mA or 0--20mA) and other forms. Under normal circumstances, there is a pulse signal input to the overspeed relay 10, and the first auxiliary contact 13 and the second auxiliary contact 14 of the overspeed relay 10 are closed, so that the +24VDC signal voltage of the main control pas...

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Abstract

The invention provides a wind turbine pitch system, which comprises an overspeed relay, a first axis control cabinet, a second axis control cabinet and a third axis control cabinet, wherein the overspeed relay is used for receiving main control voltage signals and PLC (programmable logic controller) security signals in the wind turbine pitch system, and the first, second and third axis control cabinets are electrically connected with the overspeed relay and used for pitch starting; the overspeed relay comprises a first auxiliary contact and a second auxiliary contact; when the PLC security signals are input in the overspeed relay, the first and second auxiliary contacts are closed, the first, second and third axis control cabinets operate; and when the PLC security signals disappear, the first and second auxiliary contacts are broken off, and the first, second and third axis control cabinets stop operating. The wind turbine pitch system provided by the invention has the advantage that: because a safety chain control method is adopted, the protection effect is good.

Description

technical field [0001] The invention relates to a wind power generation device, in particular to a wind power generation pitch control system. Background technique [0002] As non-renewable energy is facing the dilemma of depletion worldwide, in order to meet the needs of industrial production and human life, people's attention and utilization of renewable energy such as solar energy, wind power, and hydropower have been increasing day by day. Among them, wind power generation is a relatively mature energy development technology with high conversion efficiency, especially in plateaus, coastal areas and other areas. [0003] Wind power generation has high safety requirements. At present, most of the existing wind power generation pitch systems only use some simple 24V straight-through signals as protection, and the effect is poor when 24V is short-circuited. Contents of the invention [0004] Aiming at the deficiencies of the prior art, the purpose of the present inventio...

Claims

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Application Information

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IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 傅建民王政朱益军韩炜
Owner SUZHOU NENGJIAN ELECTRIC
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