基于频率信号的火电机组一次调频改造及优化  

Primary frequency modulation transform and optimize ofthermal power units based on frequency signals

作　　者：李华[1] 陈志刚[2] 柴琦[2] 范乐 兀鹏越[2] Li Hua;Chen Zhigang;Chai Qi;Fan Le;Wu Pengyue(Huaneng Ruijin Electric Co.,Ltd,Ganzhou,Jiangxi 341108;Xi’an Thermal Power Research Institute Co.,Ltd,Xi’an 710054;Xi’an University of Technology,Xi’an 710048)

机构地区：[1]华能瑞金发电有限责任公司,江西赣州341108 [2]西安热工研究院有限公司,西安710054 [3]西安理工大学,西安710048

出　　处：《电气技术》2019年第2期101-104,共4页Electrical Engineering

摘　　要：一次调频属于发电厂需要为电网无偿提供的基本辅助服务,当一次调频不能满足电网要求时要被考核。某些机组一次调频合格率低的原因之一是机组一次调频信号是来自机组转速信号,而电网考核一次调频采用的是频率信号,因此,信号源的差异导致一次调频性能变差。采用高精度频率源进行技术改造,同时进行了逻辑的优化,由此明显提高了一次调频的合格率,基本避免被考核情况的发生。Primary frequency modulation is a basic auxiliary service that the power plant needs to provide free of charge for the power gird. When the primary frequency modulation can not meet the requirements of the power grid, it must be assessed. One of the reasons for the low pass rate of the primary frequency modulation is that the primary frequency modulation signal source of the unit is from the speed signal of the unit, and the frequency signal is used for the power grid assess the primary frequency modulation. The difference of the signal source leads to the worse performance of the primary frequency modulation. After the technical transformation of high precision frequency source, the logical optimization is carried out at the same time, which realizes the obvious improvement of the pass rate of the primary frequency modulation, and basically avoids the occurrence of the assessment.

关 键 词：火电机组 辅助服务 一次调频 智能变送器 

分 类 号：TM621[电气工程—电力系统及自动化]