水电站机电技术2025，Vol.48Issue(12)：1-3,27,4.DOI:10.13599/j.cnki.11-5130.2025.12.001
水电厂现地LCU国产化探索
Exploration of LCU localization in hydropower plants
摘要
Abstract
This paper examines the current status of localization of programmable logic controllers(PLCs)—the core control equipment used in hydropower plants—and presents a development pathway for localizing local control units(LCUs).The pathway includes hardware research and LCU drawing design,PLC hardware testing,PLC software testing,formulation of communication protocols,design of basic functional blocks,program design,joint development,on-site installation and commissioning,unit trial operation,and project acceptance for specific hydropower plants.A case study presents an LCU retrofit at a river-basin hydropower plant,in which the original imported LCU devices were replaced with domestically produced units.The retrofit achieved a much higher CPU main frequency than the foreign product and reduced the switchover time between service and standby CPUs from about 200 ms to about 50 ms,eliminated at the same time the disturbances caused by switching.The CPU scan speed also improved substantially over the foreign device,improving the signal-processing efficiency.Additional modifications included unifying external communication protocols and reinforcing PLC trusted functions.The applicability of the retrofitted LCU was verified through two years of monitoring under real operating conditions.关键词
现地LCU/国产化/DCS系统Key words
LCU/localization/DCS system分类
建筑与水利引用本文复制引用
夏国强,张捷,张玉平..水电厂现地LCU国产化探索[J].水电站机电技术,2025,48(12):1-3,27,4.基金项目
中国长江电力股份有限公司科研项目资助(2124020009). （2124020009）
