葜軱NG电厂厂用电系统设计特点.doc

惠州LNG电厂厂用电系统的设计特点
陈晓强
Chen xiao qiang
(广东惠州天然气发电有限公司设备管理部惠州大亚湾经济开发区石化工业园邮编 516082)
(Guangdong huizhou LNG power Equipment management Dept Petro chemical industrial park of Daya Bay E&T Development Zone Huizhou. PRC Zip code:516082 )
[摘要] 21世纪初,我国在东南沿海大力建设LNG一体化工程项目,并配套引进建设一批环保高效的液化天然气发电厂。由于大功率的燃气轮机组三机同轴,并具有启动迅速的特点,故一般设计为电网调峰电厂、采用每天两班制运行方式。燃机电厂的厂用电具有哪些特点?本文作了一些阐述。
[Abstract] Early 21st Century,Our country constructs the LNG integration engineering project vigorously in the southeast coast, and the necessary introduction constructs one batch of environmental protection highly effective liquefied natural gas power plant。Because high efficiency gas turbine unit which three machines are coaxial, and has the start rapid characteristic, therefore the general designed for the work peakload, selects the daily double shift movement method。Which characteristics does the gas turbine power plant ’s factory use electricity has ?This document some elaborations.。
[关键词] 燃机电厂两班制运行高阻接地低压控制中心保安电源
[Key word] Gas turbine power plant Double shift movement High-resistance earth Low-voltage control center Security power source
概况广东惠州液化天然气电厂一期工程建设3台两班制运行390MW级的单轴燃气蒸汽联合循环机组,。是国内目前从国外引进在运行的9F级机组容量最大的燃机电厂之一,由于单轴燃气蒸汽联合循环机组的起动及运行方式有其特殊性,因此,厂用电系统既要满足各单元机组和全厂的安全运行,又要满足各机组起动的灵活性。
一、惠州LNG电厂的单轴燃气蒸汽联合循环机组设计按两班制运行,具有以下几个特点:
与常规燃煤电厂相比,辅机少,厂用电率低,约为2%。没有锅炉一次风机、送风机、引风机、制粉系统、输煤系统、排渣系统、