汽轮发电机噪声的测试与频谱的分析.pdfVIP

2009.№6 27 汽轮发电机噪声的测试与频谱分析 1 2 , 1. 150040 2. 100032 [摘 要] 630Hz 50Hz 60H [关键词] [中图分类号] TM301.4 [文献标识码] B [文章编号] 1000-3983(2009)06-0027-04 Noise Test and Spectrum Analysis for a Turbogenerator 1 2 GOU Zhi-de , WANG Jing (1. Harbin Institute of Large Electric Machinery, Harbin 150040, China 2. North China Electric Power University, Binging 100032, China) Abstract: Noise reflects the information of running generator indirectly. Tests were carried out on the sound pressure level and frequency spectrum of a water-hydrogen cooled turbogenerator. Sound pressure levels of the coupler were larger than other parts of the unit. Comparison was performed with another generator of the same type. At lower loads, the generator sound pressure level increased with reactive power, and the magnitude of different parts differed a lot, with obvious change of the spectrum at center noise frequencies of 630Hz. In order to depress electromagnetic noise, the electricity quality should be improved, and the amplitude of harmonic should be debased. On the other hand, the generator components should be tightened against the electromagnetic force. Their natural frequencies should be far from 50Hz or 60Hz and their multiple frequencies. Key words: turbogenerator; sound pressure level; frequency spectrum; reactive p