Off-course driving system protection apparatus and method

Abstract

The invention belongs to the technical field of a wind power generator, and specifically relates to an off-course gear and off-course motor protection apparatus and method, and applicable to an off-course system of the wind power generator. A soft starter is connected between four sets of off-course motors and a power supply in series; the soft starter adopts a three-phase anti-parallel thyristor as a voltage regulator; and when the motor is started, the output voltage of the thyristor is increased gradually, and the motor is accelerated gradually until the thyristor is fully switched on, and the motor works on mechanical characteristic of a rated voltage. By virtue of the off-course driving system protection apparatus and method, the problems of increasing of maintenance cost of a wind generator set and influence to the use efficiency of a fan caused by abrasion, teeth collision and the like of an acceleration off-course speed reducer and an off-course bearing gear when static mechanical equipment is suddenly loaded with high moment can be solved; and therefore, smooth starting is realized, the starting current is lowered, and tripping caused by start overcurrent can be avoided.

Description

technical field [0001] The invention belongs to the technical field of wind power generators, in particular to a protection device and method for a yaw gear and a yaw motor, and is suitable for a wind power generator yaw system. Background technique [0002] In order to obtain the maximum wind energy, the impeller must always be facing the wind direction, and the yaw system is required to align the wind direction. The yaw system consists of three parts: yaw detection and control, yaw drive, and yaw brake, while the yaw drive consists of a yaw motor, a yaw reducer, and a yaw bearing. In order to be evenly stressed during the yaw process, four sets of yaw motors and yaw reducers are generally used. [0003] Since the outer teeth of the yaw bearing and the yaw reducer are rigidly connected, the yaw motor uses a power frequency 690V power supply. If the motor is started directly at full power frequency, there will be the following disadvantages: [0004] 1. Damage the motor in...

AI Technical Summary

Problems solved by technology

[0012] In order to solve the problems caused by directly using power frequency full-voltage starting motor, a protection device and method for yaw drive system are provided to solve the problem of sudden large torque added to stationary mechanical equipment and acceleration of yaw reducer and yaw bearing Gear wear or even toothing, etc., increase the maintenance cost of wind turbines and affect the efficiency of wind turbines

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