采用DEH对200MW机组汽轮机调节系统的改造

Retrofit of Regulation System of a 200 MW Steam Turbine With DEH Technologies

荆门热电厂在对5号机组（200MW）的热控设备进行改造时，采用DEH-ⅢA数字电液调节系统对原有的液压调节系统进行了改造，实现了汽轮机的纯电调控制。通过对DEH投运过程中出现问题的分析和处理，保证了DEH各项功能的实现，改善了汽轮机的调节手段，提高了机组的自动化控制水平。在对老机组热控设备的改造工作中，应注意老机组自身的特点，处理好改造部分与保留部分的接口关系，作好对运行维护人员的技术培训，确保改造后的机组能安全稳定的运行。

When thermaldynanlic regulation system of #5 turboset in Jingmen Thermal Power Plant has to be retrofited, leaders associated decide to adopt DEH-ⅢAtype Digital Electro-Hydraulic Regulation System instead of the obsolete one.Through a series of works, all functionsof the DEH system are realized, so automization levelof this unit is raised to a new stage. In this retrofiting of an old reedation system some experience are obtainedand introduced here with the article.