大型火电励磁国产化技术概述与应用

Overview and application of large thermal power excitation localization

大型火电机组励磁系统进行国产化替代,要打破技术壁垒,从信息系统、控制系统和电子器件等多方面实现突破。首先,对现代励磁技术的控制与指令子系统、通信子系统、整流子系统及灭磁子系统等关键技术进行了系统地总结归纳,针对各技术所涉及的研究现状、存在问题及难点进行了分析与概述;其次,叙述了大型超临界670 MW火电机组HN-i6200励磁系统的国产化替代历程,对于火电机组励磁系统运行的特殊要求,开展针对性设计,研制高可靠性的国产直流开关,并通过试验研究攻克火电机组励磁系统的运行策略,成功研制出全国产化HN-i6200型励磁系统。现场测试与系统建模验证了全国产化励磁系统工作性能,为电力工业励磁技术的国产化提供了技术与实践参考。

It is necessary to break the technical barrier and make breakthroughs in information system,control system,device and other aspects when reforming large thermal power excitation system domestically.The article first systematically concludes and summarizes the key technologies of modern excitation technology,including control and command subsystems,communication subsystems,rectifier subsystems,and excitation subsystems.It analyzes and summarizes the research status,existing problems,and difficulties involved in each technology at home and abroad.Secondly,the localization and replacement process of the HN-i6200 excitation system for largescale supercritical 670 MW thermal power units was described.Targeted design was carried out to meet the special requirements of the excitation system operation for thermal power units,and highly reliable domestic DC breakers were developed.Through experimental research,the operation strategy of the excitation system for thermal power units was overcome,and a nationally produced HN-i6200 excitation system was successfully developed.The onsite testing and system modeling have verified the working performance of the nationwide production excitation system,providing technical and practical references for the localization of excitation technology in the power industry.