摘要
统计了某300 MW火力发电机组的调峰运行参数,基于快速傅里叶变换(FFT)对调峰数据进行频谱分析,得到机组调峰运行特性。采用有限元计算的方法对调峰运行的高压导汽管疲劳损伤进行了研究。结果显示:当机组负荷不低于128 MW时,负荷与主蒸汽压力的波动密切相关,而与主蒸汽温度无明显的关联性;每天调峰2次的情况居多,约占调峰运行总天数的 1/2 ,每天调峰1次的情况约占调峰运行总天数的 1/3;每天调峰3次的情况较少。在高压导汽管支吊架设计及应用良好、机组调峰负荷率不低于42%的情况下,以每天调峰2次计算,高压导汽管可运行6.25×10^(5) d。
The peaking operation parameters of a 300 MW thermal power unit were collected and subjected to spectral analysis through using fast Fourier transformation (FFT) to identify the characteristics of peaking operation for the unit. The fatigue damage of high-pressure steam pipe during peaking operation was studied by finite-element calculation. Results show that, when the unit load is not less than 128 MW, the load is closely related to fluctuations in the steam pressure but not to the main steam temperature. The frequency of peak regulation occurs twice daily, accounting for half of the total days of peaking operation;peak regulation once a day accounts for one-third of the total days while peak regulation three times a day is low. Under the conditions of well-designed and well-applied support hangers for high-pressure steam pipes and a peak regulation load rate of not less than 42%, the high-pressure main steam pipe can operate for 6.25×10^(5) days with peak regulation twice a day.
作者
赵建军
刘长福
谌康
王旭
李凤强
卢波
褚建忠
Zhao Jianjun;Liu Changfu;Shen Kang;Wang Xu;Li Fengqiang;Lu Bo;Chu Jianzhong(Beijing Gaojing Thermal Power Plant of Datang International Power Generation Co.,Ltd.,Beijing 100041,China;North Electric China Power Test and Research Institute of Datang Intelligent Energy Technology Research Institute Co.,Ltd.,Beijing 100044,China)
出处
《发电设备》
2023年第6期375-380,共6页
Power Equipment
关键词
火力发电机组
调峰
主蒸汽系统
管道
疲劳
thermal power generating unit
peak regulation
main steam system
pipeline
fatigue
