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

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 wind turbine 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 commercial development. my country has abundant reserves of wind energy resources, and the development of wind energy is of 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 area of ​​energy development. [0003] In terms of the development of wind power technology, the single-unit capacity of wind turbines is developing towards large-scale development, and megawatt-level wind turbines have become the mainstream products i...

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

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