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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Fiber Bragg Grating Temperature Sensors in a 6.5-MW Generator Exciter Bridge and the Development and Simulation of Its Thermal Model
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Fiber Bragg Grating Temperature Sensors in a 6.5-MW Generator Exciter Bridge and the Development and Simulation of Its Thermal Model

机译：6.5 MW发电机励磁桥中的光纤光栅温度传感器及其热模型的开发与仿真

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摘要

This work reports the thermal modeling and characterization of a thyristor. The thyristor is used in a 6.5-MW generator excitation bridge. Temperature measurements are performed using fiber Bragg grating (FBG) sensors. These sensors have the benefits of being totally passive and immune to electromagnetic interference and also multiplexed in a single fiber. The thyristor thermal model consists of a second order equivalent electric circuit, and its power losses lead to an increase in temperature, while the losses are calculated on the basis of the excitation current in the generator. Six multiplexed FBGs are used to measure temperature and are embedded to avoid the effect of the strain sensitivity. The presented results show a relationship between field current and temperature oscillation and prove that this current can be used to determine the thermal model of a thyristor. The thermal model simulation presents an error of 1.5 °C, while the FBG used allows for the determination of the thermal behavior and the field current dependence. Since the temperature is a function of the field current, the corresponding simulation can be used to estimate the temperature in the thyristors.
机译：这项工作报告了晶闸管的热建模和表征。晶闸管用于6.5兆瓦发电机励磁桥中。使用光纤布拉格光栅（FBG）传感器执行温度测量。这些传感器的优点是完全无源且不受电磁干扰，并且还可以多路复用在单根光纤中。晶闸管热模型由一个二阶等效电路组成，其功率损耗导致温度升高，而损耗则基于发电机中的励磁电流进行计算。六个多路复用的FBG用于测量温度，并被嵌入以避免应变敏感性的影响。给出的结果表明了场电流与温度振荡之间的关系，并证明了该电流可用于确定晶闸管的热模型。热模型仿真的误差为1.5°C，而所使用的FBG允许确定热行为和励磁电流依赖性。由于温度是励磁电流的函数，因此可以使用相应的仿真来估算晶闸管中的温度。

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