DEH在N55-90型汽轮机上的应用

Application of DEH on N55-90 Model Turbine

DEH(数字电液调节系统 )是采用计算机对汽轮机进行调节、监视和控制的重要装置。大屯煤电电业公司 3#机调速系统改造工程 ,选用了低压透平油纯电调控制系统作为汽轮机的唯一控制手段 ,实现了对机组启动、并网、带负荷过程中的转速、负荷控制 ,保证了机组的正常运行。本文结合现场实际 ,简要介绍了DEH的构成、工作原理、改造情况及应用效果。

Digital Electru-Hydraulic(DEH) system is the important apparatus using computer to modulate,surveil and control the turbine.A pure DEH system of low oil-pressure was adopted as the unique control instrument in the reform of No.3 unit of Datun power plant,which realizes the control for rev and load during the start-up,net-joining and load-carrying of the unit,and ensures the well-balanced operation of the unit. The paper Combines with the practical project, and briefly introduces the structure,working principle,reform circs,and application effect of the DEH system.