冷凝水温度对汽包水位计测量误差的影响及消除  

Influence and Measurement Error caused by Condensate Temperature in Drum Level DP-transmitter

作　　者：史昱[1] 郎澄宇[2] 

机构地区：[1]山东交通学院 [2]山东电力研究院

出　　处：《电站系统工程》2007年第4期53-54,共2页Power System Engineering

摘　　要：发电厂汽包水位的准确测量直接关系到机组的安全稳定运行和汽水调节品质。分析了用于电站锅炉汽包水位测量的差压式汽包水位计测量误差产生的各种原因,并针对取样管冷凝水温度变化对测量误差产生的原因进行了讨论。通过计算校核,得出不进行冷凝水温度补偿,将导致汽包水位测量误差远大于国家电力公司规定的测量允许误差范围,会给机组的安全运行带来隐患,并就冷凝水温度动态补偿给出了一种切实可行的方案。该方案简单实用,便于推广。The correct measurement of drum level plays a very important role for the stability and safety of power plant units running and the quality of the steam-water adjustment. It analyzes the causes of measurement error of differential pressure drum level transducer in power plant units. It discusses the error caused by the changes of the condensate temperature in sampling pipe, Through the calculation and calibration, it draws the conclusion that the measurement error will much surpass the allow range ruled by the state power corp. and will also influence the safety running of units. It also bring forwards a practical method for condensate temperature＇s dynamic compensation.

关 键 词：锅炉 冷凝水温度 水位测量 误差 动态补偿 平衡容器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]