Low-temperature wind power generator protective controller and method based on Cortex-m3 processor

Abstract

The invention discloses a low-temperature wind power generator protective controller and a method based on a Cortex-m3 processor. Constant currents larger than 1mA are injected to a first sensor and a second sensor. A channel switcher is switched to a first sensor state to measure external temperature and switched to a second sensor state to measure internal temperature. A measured first sensor signal and a measured second sensor signal are converted to temperature values through operation and calibration of the Cortes-m3ARM processor after being amplified by an instrument amplifier and converted by an A / D converter. An optocoupler in a heating device drives a large current thyristor, the Cortes-m3ARM processor sends a connection signal to the heating device, the large current thyristor is connected, a heating wire starts to heat, a motor rotor is heated, and effective current values of the thyristor and the heating wire are controlled through control of a connection angle of the thyrustor. Different temperature areas of work of parts according to different work conditions of the parts of a low-temperature wind power generator can be arranged, and control requirements are met.

Description

technical field [0001] The invention relates to a protection controller of a generator set, which implements temperature control, multi-point networking communication and remote monitoring of a wind power generator under ultra-low temperature conditions. Background technique [0002] Most of the wind power generation areas are concentrated in high latitudes and high altitude areas, where the low temperature conditions are harsh. If the motor rotor is forced to start at low temperature, it will accelerate the early wear of the rotor and greatly shorten the service life of the wind turbine. The use of high-end synthetic metal materials will inevitably increase the cost of motor manufacturing. Ordinary temperature sensors in traditional wind turbine protection controllers often lead to large deviations in measurement accuracy and low test stability in low-temperature and harsh environments. Most of the selected controller processors cannot adapt to the extremely harsh low tem...

AI Technical Summary

Problems solved by technology

If the motor rotor is forced to start at low temperature, it will accelerate the early wear of the rotor and greatly shorten the service life of the wind turbine

The use of high-end synthetic metal materials will inevitably increase the cost of motor manufacturing

Ordinary temperature sensors in traditional wind turbine protection controllers often lead to large deviations in measurement accuracy and low test stability in low temperature and harsh environments

Most of the selected controller processors cannot adapt to the extremely harsh low temperature environment, resulting in the slow response speed of the entire controller

If the motor rotor cannot be preheated in time for a long time, it will cause damage to the wind turbine in severe cases

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