Indirect measuring method for wind turbine generator main bearing inner temperature

Abstract

The invention discloses an indirect measuring method for wind turbine generator main bearing inner temperature, and belongs to the technical field of wind power. A plurality of temperature sensors arearranged along the circumference of a main bearing, the main bearing outer layer temperature is measured in a multi-point mode, and the temperature average value of the multi-point measurement is calculated as the main bearing outer layer temperature T outer; the influences of the cabin environment temperature T environment and the wind speed n on the cabin main bearing temperature are combined,a mathematical model for main bearing temperature measuring is constructed, and function relationships between the main bearing inner temperature T inner and the cabin inner environment temperature Tenvironment, the main bearing outer layer temperature T outer and the fan rotating speed n are obtained through function fitting; and the main bearing inner temperature T inner is calculated through afunction expression after fitting. According to the method, the main bearing inner temperature can be detected, a relatively accurate main bearing temperature value can be obtained, the value has important reference significance in the operation of a fan and the maintainance, and the problems that a third party cannot directly measure the main bearing inner temperature or obtain data and interfaces of the main bearing direct measuring temperature are solved.

Description

technical field [0001] The invention belongs to the technical field of wind power, and in particular relates to an indirect method for measuring the internal temperature of a main bearing of a wind turbine. Background technique [0002] The turbine nacelle is affected by many factors such as the harsh environment of the wind farm, strong winds and sand blowing, severe smog, poplar catkins and catkins all over the sky in spring, and high temperature in summer, which lead to limited power operation or even shutdown of the wind turbine. Excessively high temperature will cause the expansion of various parts such as the main shaft, main bearing and base in the nacelle. If it is small, it will affect the normal operation of the fan, and if it is too high, it will damage the fan. Therefore, the temperature monitoring of the fan nacelle has become a key research topic. , the internal temperature detection of the main bearing is an important part of it. [0003] At present, the meth...

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Problems solved by technology

[0004] In view of the above technical problems, solve the problem that the internal temperature of the main bearing cannot be obtained directly

The invention provides an indirect measurement method for the internal temperature of the main bearing of a wind turbine, which solves the problem that a third party cannot directly measure the internal temperature of the main bearing or obtain the data and interface for directly measuring the temperature of the main bearing, and also improves the accuracy of the ambient temperature detection of the fan cabin sex

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