IGCC汽机主汽调门双LVDT优化研究  

Research on the Optimization of Double LVDT for the Main Valve of IGCC Steam Turbine

作　　者：丁建博 冯松 张宇 王鑫伦 苏岩 刘凤琪 Ding Jianbo;Feng Song;Zhang Yu;Wang Xinlun;Su Yan;Liu Fengqi(Huaneng(Tianjin)Coal Gasification Power Generation Co.,Ltd.,LTD.,Tianjin,300452,China;Huaneng Tongliao Wind Power Co.,Ltd.,Inner Mongolia Autonomous Region,Tongliao,028000,China)

机构地区：[1]华能(天津)煤气化发电有限公司,天津300452 [2]华能通辽风力发电有限公司,内蒙古自治区通辽028000

出　　处：《仪器仪表用户》2022年第9期78-81,77,共5页Instrumentation

摘　　要：天津IGCC示范电站的汽机采用上海汽轮制造的LZN93-9.2/4.0/0.586联合循环凝汽式汽轮机。高调、再热调都是伺服型油动机,油动机LVDT是阀位闭环控制中重要的位置反馈元件。但在原机组中,EH系统的伺服型执行机构都是每台执行机构配备了一支LVDT,一旦损坏,将直接影响阀位控制和机组的稳定性。本文将IGCC机组主汽调门单LVDT控制,改造成双LVDT控制,确保一个故障后阀门仍然能够正常调节,通过机械部分、支架设计安装调试,对双LVDT测试检查以保证机械部分可靠性。在电气部分增加线路、变送器来实现新增LVDT正常工作,最后通过DEH的逻辑控制实现双LVDT无扰动切换工作,真正实现双LVDT冗余工作,从而增加设备冗余性,提高设备机组可靠性。The steam turbine of Tianjin IGCC Demonstration Power Station adopts LZN93-9.2/4.0/0.586 combined cycle condensing steam turbine manufactured by Shanghai Turbine.The high profile and reheat regulators are all servo-type oil motors.The oil motor LVDT is an important position feedback element in the valve position closed-loop control.However,in the original unit,the servo-type actuators of the EH system are equipped with an LVDT for each actuator.Once damaged,it will directly affect the valve position control and the stability of the unit.In this paper,the single LVDT control of the main steam regulating valve of the IGCC unit is modified,and the double LVDT control is modified to ensure that the valve can still be adjusted normally after a fault.Through the design,installation and debugging of the mechanical part and the bracket,the double LVDT test is checked to ensure the reliability of the mechanical part.In the electrical part Add lines and transmitters to realize the normal operation of the new LVDT,and finally realize the non-disturbance switching of dual LVDT through the logic control of DEH,which truly realizes the redundant operation of dual LVDT,from in-creasing equipment redundancy and improving equipment reliability.

关 键 词：IGCC LVDT 主汽调门 汽轮机 

分 类 号：TM611.3[电气工程—电力系统及自动化]