茂名热电厂4号机组采用DEH-ⅢA型电液调节系统的改造

Transformation of Unit 4 in Maoming Cogeneration Power Plant to use DEH-A digital electro-hydraulic control system

针对茂名热电厂4号机组汽轮机原采用的纯液压调节系统所存在的不足,将汽轮机的调节系统改造成为DEH-ⅢA型数字式电液调节系统。为此,介绍了DEH-ⅢA型系统的硬件结构、软件结构、系统的功能和特点。经过2年多的运行证明,采用数字式电液调节系统后,缩短了机组的起停时间,减轻了运行人员的劳动强度,提高了机组的快速调峰能力。

Owing to the defects of the hydraulic control system originally used for Unit 4 steam turbine in Maoming Cogeneration Power Plant, a transformation was conducted and DEH-ⅢA digital electro-hydraulic （DEH） control system adopted. This paper describes the hardware structure, software configuration, functions and features of the DEH-ⅢA system. Over two-year operation proves the capabilities of the DEH control system in shortening the startup and shutdown duration of the unit. saving labour and improving the quick peak-shaving ability of the unit.