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Relay protection device of variable pitch blade system of wind driven generator

A relay protection device and wind power generator technology, which is applied in the control of wind power generators, battery circuit devices, wind power generators, etc., can solve problems such as malfunction, system power consumption, and relay protection occupying a large space in the shaft control cabinet. Achieve the effects of reduced power consumption, small size, and reduced number of relays

Active Publication Date: 2011-02-02
DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional relay protection takes up a lot of space in the shaft control cabinet; multiple relays are required to be interlocked and linked, which consumes system power; the cantilever beam structure of the relay may malfunction when the fan vibrates, reducing the number of relays and reducing the possibility of malfunction

Method used

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  • Relay protection device of variable pitch blade system of wind driven generator
  • Relay protection device of variable pitch blade system of wind driven generator
  • Relay protection device of variable pitch blade system of wind driven generator

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Embodiment Construction

[0036] Such as figure 1 , figure 2 As shown: the present invention is a digital protection device for fan pitch system, which is arranged in the shaft control cabinet that drives the blades to operate, and is a power supply protection switch realized by the on / off of the relay. It mainly includes the following parts:

[0037] The power supply is used to supply power to the pitch motor and its brakes;

[0038] Pitch motor relay, used to control the power on or off of the pitch motor;

[0039] Brake brake relay, used to control the power-on or power-off of the brake brake;

[0040] The relay control circuit is used to control the power-on or power-off of the pitch motor relay and the brake relay, and the relay control circuit is a digital circuit;

[0041] Control power supply, used to supply power to the relay control circuit, is 24VDC.

[0042] The power supply is two-way switchable power supply, which is 400VAC power supply and 230VAC UPS power supply. The pitch motor ...

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Abstract

The invention provides a relay protection device of a variable pitch blade system of a wind driven generator. The device comprises a power source, a variable pitch blade motor relay, a brake relay, a relay control circuit and a control power source, wherein the power source is used for supplying power to the variable pitch blade motor and a brake thereof; the variable pitch blade motor relay is used for controlling power-on or power-down of the variable pitch blade motor; the brake relay is used for controlling the power-on or power-down of the brake; the relay control circuit is used for controlling the power-on or power-down of the variable pitch blade motor relay and the brake relay; the control power source is used for supplying power for the relay control circuit; and the relay control circuit is a digital circuit. The device has the advantages of realizing digital protection of a single blade, improving the action feature and the performance of the relay protection, occupying small space and volume of a shaft control cabinet and greatly reducing the power consumption, along with high correctness, stability, reliability and self-examination and polling capacity, friendly man-machine interface, superior technical structural conditions, remarkable economic benefit and obvious technical improvement, and is flexible and convenient to use, and easy to use on a large scale and popularize.

Description

technical field [0001] The invention relates to the field of new energy, in particular to a digital protection system for a fan pitch system in wind power generation control technology. Background technique [0002] Wind energy is the fastest-growing clean energy among renewable energy sources, and it is also the most promising power generation method for large-scale development and commercialization. my country has abundant reserves of wind energy resources, and the development of wind energy has great practical significance for improving the energy structure and alleviating energy shortages. In recent years, the scale of my country's wind power industry has gradually expanded, and wind power has become an important field of energy development. [0003] In terms of wind power technology development, the single-unit capacity of wind power generators is moving towards large-scale development, and megawatt-level wind power machines have become mainstream products in the inter...

Claims

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Application Information

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IPC IPC(8): F03D7/00H02J9/04H02P9/04H02J7/00
CPCY02E10/723Y02E10/766Y02B10/70Y02E10/72Y02E10/76
Inventor 闵泽生曾斌陈辉
Owner DONGFANG ELECTRIC AUTOMATIC CONTROL ENG CO LTD
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