应用谐振腔微扰法在线测量发电机的氢气湿度

On-line Hydrogen Humidity Measurement for Generators by Resonant Cavity Perturbation Method

针对目前测量发电机氢气湿度方法和仪器的不足,提出了采用谐振腔微扰测量氢气湿度的新方法.根据微波谐振腔微扰原理,推导了氢气湿度与谐振器频偏的关系,提出了在线测量氢气湿度的方案.为提高测量精度,对模型设计以及实验装置进行了优化,并给出了一种简单、实用的温度补偿方法.试验结果表明:该系统结构简单、成本适中、测量精度较高,能够实现氢气湿度的在线测量.

Aiming at the deficiency of currently used ways and instruments for measuring the hydrogen humidity in generators, a new method based on resonant cavity perturbation principle is being put forward, while the relationship between hydrogen humidity and resonance frequency offset deduced, and therefore an on-line way for hydrogen humidity measurement proposed. For the sake of higher measurement precision, the design model and test rig are optimized, after which a simple and applicable way by temperature compensation is obtained. Test results show that featured by simple structure, moderate cost and higher precision, the way proves to be applicable for on-line measurement of hydrogen humidity.