Overspeed protective device and overspeed protective method of wind driven generator

Abstract

The invention discloses an overspeed protective device and an overspeed protective method of a wind driven generator. The overspeed protective device of the wind driven generator can effectively send an alarm signal in time under a specific threshold value, and the protective method is convenient to operate and solves the problem of poor reliability and operability of the prior art. The overspeed protective device of the wind driven generator comprises a counter and a pulse circuit which are connected in series. The overspeed protective method of the wind driven generator comprises an inputting step and an alarming step, wherein in the inputting step, the rotate speed of the wind driven genitor is input into the threshold of the counter, and simultaneously a high-speed counting clock is input into a counter clock to record the rotate speed of the wind driven genitor; and in the alarming step, when the number of clocks recorded by the counter in the period corresponding to the rotate speed of the wind driven genitor is greater than the predetermined threshold value, the pulse alarming pulse circuit can output alarming signals.

Description

technical field [0001] The invention relates to an overspeed protection device and a protection method for a wind power generator. Background technique [0002] With the development of the economy, China's energy and power supply is becoming increasingly tense, and the government and industry have paid more attention to wind power construction than hydropower. The total amount of exploitable wind energy resources in the world is about twice the total energy demand of human beings. The abundance and renewable nature of wind energy are the most attractive reasons. However, due to the development of the current wind power technology, the development of the wind power industry is restricted. At present, my country's wind power output is less than 1% of my country's total power generation. The potential of wind power is unlimited, and technology is the key. Wind power generation technology, especially control technology, has developed rapidly in recent years. However, the core...

AI Technical Summary

Problems solved by technology

However, the core of control technology has not been fully grasped by the domestic technical team, especially the most important protection technology link

At present, the generator overspeed protection technology is immature and lacks operability and reliability

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