發電機組的故障趨勢分析經常受到負荷變化的影響。尤其基于振動分析，當負荷變化
明顯時，與能量有關的故障特征值發生相應變化，影響了故障趨勢分析的效果。為了減少這種影響，提出一種綜合分析的反映發電機組故障惡化程度的趨勢曲線。它是基于無量綱波形統計分析與幅值域分析，提取對能量不敏感的形狀因子，實現形狀與能量綜合分析。實驗結果表明，它比傳統的振動通頻值能更好的反映發電機組的故障發展趨勢。
關鍵詞：振動分析; 發電機組; 趨勢分析
Abstract： The trend analysis of faults in generator sets is often influenced by load variation. Especially, when the load of generator sets change obviously, the fault parameters based on vibration analysis, which are related to energy, are changing with the load accordingly. So, the results of fault trend analysis are easier to be influenced. To avoid this effect, a new synthetic analysis curve to reflect the fault deterioration trend is presented. It realizes the synthetic analysis of shape and energy and it gets the waveform factors which are not sensitive to the variation of energy by using the analysis of nondimensional parameters of waveform and values of amplitude. The results of experiments proved that it can show the fault trend better than the traditional analysis of vibration amplitude.
Key Words: vibration analysis; generator sets; trend analysis