水电自动化与大坝监测
水電自動化與大壩鑑測
수전자동화여대패감측
HYDROPOWER AUTOMATION AND DAM MORNITORING
2015年
2期
20-23,26
,共5页
混流式机组%低负荷运行%尾水管压力脉动%多元线性回归%稳定性
混流式機組%低負荷運行%尾水管壓力脈動%多元線性迴歸%穩定性
혼류식궤조%저부하운행%미수관압력맥동%다원선성회귀%은정성
the mixed flow units%Low-load operation%The draft tube pressure pulsation%multiple linear regression%stability
目前已经建成或正在建的大型水电站中混流式机组运用广泛。由于水力因素影响，机组固有特性决定其无法在低负荷稳定运行。因此，本文通过介绍混流式机组在低负荷运行时的稳定性影响因素、尾水管压力脉动的成因、特性、对机组稳定性的影响以及其与运行工况和空化关系，提出运用多元线性回归分析算法建立回归模型的思路。利用该模型定量分析机组稳定性与工况参数、空化系数和时间因子的影响关系，进行稳定运行区的划分和机组稳定运行时的寿命预测。
目前已經建成或正在建的大型水電站中混流式機組運用廣汎。由于水力因素影響，機組固有特性決定其無法在低負荷穩定運行。因此，本文通過介紹混流式機組在低負荷運行時的穩定性影響因素、尾水管壓力脈動的成因、特性、對機組穩定性的影響以及其與運行工況和空化關繫，提齣運用多元線性迴歸分析算法建立迴歸模型的思路。利用該模型定量分析機組穩定性與工況參數、空化繫數和時間因子的影響關繫，進行穩定運行區的劃分和機組穩定運行時的壽命預測。
목전이경건성혹정재건적대형수전참중혼류식궤조운용엄범。유우수력인소영향，궤조고유특성결정기무법재저부하은정운행。인차，본문통과개소혼류식궤조재저부하운행시적은정성영향인소、미수관압력맥동적성인、특성、대궤조은정성적영향이급기여운행공황화공화관계，제출운용다원선성회귀분석산법건립회귀모형적사로。이용해모형정량분석궤조은정성여공황삼수、공화계수화시간인자적영향관계，진행은정운행구적화분화궤조은정운행시적수명예측。
The mixed flow units are widely used in large hydropower station now,including the have built station or the building station.Due to hydraulic factors,the inherent characteristic of mixed flow units decided its unstable operation at low load.So In this paper,by introducing the mixed flow units at low load stability influence factors when running,the causeand features of the draft tube pressure pulsation,as well as the influence on the stability of the unit,the relationship between vibration and operation condition,vibration and cavitation.A train of thought which building regression model u-sing multiple linear regression analysis algorithm is put forward.Quantitative analysis of the influence of Working parame-ters,cavitation coefficient and time factor's influence on the stability,division of stable operation area and life prediction of unit stable operation.
