變電站GIS母線高頻振動響聲研究
劉超峰1 ，宋松民1 ，陳英2 ，趙海洋1
(1 河南平高電氣股份有限公司，河南 平頂山 467000；
2 平高集團有限公司，河南 平頂山 467000)
摘 要 ：某變電站 GIS 在帶電調(diào)試期間，母線產(chǎn)生高頻振動響聲。對存在高頻振動響聲的帶電 GIS 母線分別在無任何措施、刷阻尼涂料及增加抱箍的方式下進行試驗研究，通過試驗測試發(fā)現(xiàn)，振動信號的主頻率約 2 879.7 Hz，在 100 Hz 頻率處的振動加速度相對較小。通過仿真計算分析，推斷母線筒產(chǎn)生高頻振動響聲的原因為：母線筒存在約 2 879.7 Hz 的固有頻率，這種固有頻率的模態(tài)振型為典型的整體膨脹收縮，母線加載電壓產(chǎn)生交變的電場力，電場力的激勵頻率與母線筒的固有頻率吻合，產(chǎn)生高頻振動響聲。
關(guān)鍵詞 ：GIS 母線 ；響聲 ；高頻振動 ；模態(tài)振型 ；膨脹收縮 ；激勵
中圖分類號 ：TM595 ；TM63 文獻標識碼 ：A 文章編號 ：1007-3175(2021)06-0029-04
Study on High Frequency Vibration Noise of GIS Bus in Substation
LIU Chao-feng1 , SONG Song-min1 , CHEN Ying2 , ZHAO Hai-yang1
（1 Henan Pinggao Electric Co., Ltd, Pingdingshan 467000, China;
2 Pinggao Group Co., Ltd, Pingdingshan 467000, China）
Abstract: During the period of live commissioning of GIS in a substation, the bus produced the high frequency vibration noise. The live GIS busbars with high frequency vibration noise were tested and studied without any measures, by applying damping coating and by adding hoop. The experimental result shows that the main frequency of the vibration signal is about 2 879.7 Hz, and the vibration acceleration at 100 Hz is relatively small. Through simulation calculation and analysis, it is inferred that the reason for the high frequency vibration of the busbar drum is: the busbar drum has a natural frequency of about 2 879.7 Hz. The mode shape of this natural frequency is a typical overall expansion and contraction, and the busbar loading voltage produces alternating changes. The electric field force, the excitation frequency of the electric field force coincides with the natural frequency of the bus barrel, which produces high frequency vibration noise.
Key words: GIS bus; noise; high frequency vibration; mode shapes; expansion and contraction; excitation
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