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MAIN CONTENTS
2014年
4期
94-96
,共3页
反馈装置%LVDT%调试
反饋裝置%LVDT%調試
반궤장치%LVDT%조시
feedback device%LVDT%debugging
本文涉及电厂汽轮机高、中压主汽门，高、中压调门开度的反馈装置--LVDT，解决了调试过程中人力、工时、环境、干扰等多项问题。机组运行过程中，由DCS向现场调门发送开度信号来自动调节流量、压力等参量，而获取现场阀门开度的唯一手段就是现场的位置反馈装置传送回控制室CRT的电流信号，如果反馈的信号和送出的信号偏差超过一定数值，就会造成系统的不稳定现象，可能造成整个机组切换手动，造成不必要的损失。而由于机组车头处温度较高，电子器件损坏概率直线上升，备件更换的频率也随之上升，所以位置反馈的校验装置就显得更加重要了。位置反馈不准确则意味着无法真实反映阀门的开度，而阀门的开度直接控制了进油/进气量，对机组的负荷量和设备的正常运转均会带来影响。电厂汽轮机高、中压主汽门，高、中压调门是对汽轮机负荷进行调节的关键运行设备，而LVDT位置反馈是电厂运行人员对这些门开度进行连续监测的唯一途径，它的准确性直接影响电厂机组的负荷情况。以往的调试方法费时、费力，且存在安全隐患。现按现场LVDT装置接头的规格，自制一工具，将电流表串入现场回路中，使调试人员能在现场单独观测电流变化，实现现场调试、现场观测，减少环境干扰、提高检修效率。
本文涉及電廠汽輪機高、中壓主汽門，高、中壓調門開度的反饋裝置--LVDT，解決瞭調試過程中人力、工時、環境、榦擾等多項問題。機組運行過程中，由DCS嚮現場調門髮送開度信號來自動調節流量、壓力等參量，而穫取現場閥門開度的唯一手段就是現場的位置反饋裝置傳送迴控製室CRT的電流信號，如果反饋的信號和送齣的信號偏差超過一定數值，就會造成繫統的不穩定現象，可能造成整箇機組切換手動，造成不必要的損失。而由于機組車頭處溫度較高，電子器件損壞概率直線上升，備件更換的頻率也隨之上升，所以位置反饋的校驗裝置就顯得更加重要瞭。位置反饋不準確則意味著無法真實反映閥門的開度，而閥門的開度直接控製瞭進油/進氣量，對機組的負荷量和設備的正常運轉均會帶來影響。電廠汽輪機高、中壓主汽門，高、中壓調門是對汽輪機負荷進行調節的關鍵運行設備，而LVDT位置反饋是電廠運行人員對這些門開度進行連續鑑測的唯一途徑，它的準確性直接影響電廠機組的負荷情況。以往的調試方法費時、費力，且存在安全隱患。現按現場LVDT裝置接頭的規格，自製一工具，將電流錶串入現場迴路中，使調試人員能在現場單獨觀測電流變化，實現現場調試、現場觀測，減少環境榦擾、提高檢脩效率。
본문섭급전엄기륜궤고、중압주기문，고、중압조문개도적반궤장치--LVDT，해결료조시과정중인력、공시、배경、간우등다항문제。궤조운행과정중，유DCS향현장조문발송개도신호래자동조절류량、압력등삼량，이획취현장벌문개도적유일수단취시현장적위치반궤장치전송회공제실CRT적전류신호，여과반궤적신호화송출적신호편차초과일정수치，취회조성계통적불은정현상，가능조성정개궤조절환수동，조성불필요적손실。이유우궤조차두처온도교고，전자기건손배개솔직선상승，비건경환적빈솔야수지상승，소이위치반궤적교험장치취현득경가중요료。위치반궤불준학칙의미착무법진실반영벌문적개도，이벌문적개도직접공제료진유/진기량，대궤조적부하량화설비적정상운전균회대래영향。전엄기륜궤고、중압주기문，고、중압조문시대기륜궤부하진행조절적관건운행설비，이LVDT위치반궤시전엄운행인원대저사문개도진행련속감측적유일도경，타적준학성직접영향전엄궤조적부하정황。이왕적조시방법비시、비력，차존재안전은환。현안현장LVDT장치접두적규격，자제일공구，장전류표천입현장회로중，사조시인원능재현장단독관측전류변화，실현현장조시、현장관측，감소배경간우、제고검수효솔。
This paper relates to a power plant steam turbine high, medium pressure main steam valve, high pressure valve, open degree feedback device -- LVDT, solve the manpower, time, environment, a number of problems in the process of debugging interference. During operation of the unit, from DCS to the control sending opening signal to automatically adjust the flow rate, pressure and other parameters, and access to on-site valve opening degree is the only means of field position feedback device are transmitted back to the control room CRT current signal, if the signal error feedback signal and sent over a certain value, it will cause no the stability of system, may cause the entire unit manual, causing unnecessary losses. But because the unit head at high temperature, electronic device damage probability of straight up, the frequency of replacement of spare parts will also rise, so check device position feedback becomes more and more important. The position feedback is not accurate means can not be a true reflection of the valve opening, and the opening of the valve to control the oil / air intake, normal operation load and equipment on the unit's will bring influence. Steam turbine high, medium pressure main steam valve, high pressure valve, is the key equipment for adjusting the turbine load, while the LVDT position feedback is the only way to plant personnel for continuous monitoring of the door opening, it directly affects the accuracy of the load condition of the power plant unit. Debugging method of the time-consuming, laborious, and hidden safety problems. At site LVDT connector specifications, a tool, the current list into the field circuit, the debugging personnel can observe current change alone in the field, realize the site debugging, field observation, reduce environmental interference, improve the maintenance efficiency.
