1000MW机组高加水位测量偏差分析与处理  

Deviation Analysis and Treatment of Water Level Measurement for High-pressure Heater of 1000 MW Units

作　　者：郑卫东[1] 孙长生[2] 付望安 张鹏[2] 李捍华[1] 

机构地区：[1]华能玉环电厂,浙江省台州市317604 [2]浙江省电力试验研究院,杭州市310014

出　　处：《电力建设》2011年第6期90-93,共4页Electric Power Construction

基　　金：国家工程项目(发改能源[2007]1697号)

摘　　要：介绍了华能玉环电厂1 000MW机组高压加热器(简称高加)水位测量的基本原理和测量表计间偏差问题的查找方法;分析了机组高加磁性翻板式水位计和差压式水位计2种类型表计测量偏差产生的原因,指出了水位测量在测量筒体、安装、维护等方面存在的问题;探讨了高加水位测量通过红外线点温计和红外成像仪测量水位筒体表面温度梯度、辅助判断水位测量位置的新方法,提出了该机组高加水位测量偏差问题的处理建议,为火电机组高加水位测量系统安装、检修、运行和维护提供参考。The basic principle of measuring water level of high-pressure（HP） heater and the method for finding measurment deviation of different instruments are introduced in 1 000 MW units of Huaneng Yuhuan Power Plant.The reasons of why the measurement deviation occuring of the magnetic-flap and pressure-difference water-level meter are analyzed.Furthermore,the problems of water-level measurement existed in barrel,installation and maintainance are pointed out.A new method for assistant determination of water-level measuring locations is presented,where the temperature gradient of barrel surface is measured by infrared thermometer and thermal mapper.The suggestions for treating measured deviation of the water level are discussed,providing references to the installation,trouble shooting,operation and maintenance of water-level measurement of HP heater in power plants.

关 键 词：高加水位 磁性翻板式水位计 差压式水位计 测量偏差 红外线 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]