near dc 中文意思是什麼
near dc
解釋
近直流-
In the thesis, a signal processing scheme of polarization - insensitive fiber optic michelson interferometric magnetic sensor is described : making the interferometer work near the quadrature with closed loop controlling working point method, the fundamental frequency component of the magnetic field sensing signals can be detected to measure the input direct current ( dc ) magnetic field by phase sensitive demodulation
本文主要介紹了偏振無關光纖michelson干涉型微弱磁場傳感器信號處理的方案:通過閉環控制工作點演算法使干涉儀工作在正交工作點處，再利用相敏檢波演算法提取傳感器輸出信號的基頻分量，以測量直流磁場的大小。 -
On the contrary, because of the effect of positive damping provided by the inverter, the unit near a inveter will have no subsynchronous oscillation risk. based on the same method described above, a damping study is carried out for a hybrid ac / dc system, which include a hvdc link and an ac transmission line in parallel
研究表明，系統整流站附近的同步發電機組要承受電氣負阻尼作用，因此有可能引起機組低頻扭轉振蕩模式失穩；而hvdc的逆變站向其臨近同步發電機組提供正阻尼，因而機組不存在次同步振蕩危險。 -
Based on the detailed investigation about the present conditions of polution in yichang and three gorges dc converter stations and its prediction, and concerning the esdd measurement of dc, ac equipment near the three gorges dc converter station, the operating experience and the atmospheric characters of the yichang city, the porper data of esdd of three gorges dc converter station is presented. and further more, presents the related structural parameters of outer insulation of out door dc, ac equiptment
針對宜昌市大氣污染和三峽換流站站址附近污穢狀況，結合三峽換流站附近交、直流設備鹽密測量和運行經驗以及宜昌氣候特徵，提出了三峽換流站適用的等值附鹽密度值，並在此基礎上提出了交、直流戶外設備外絕緣的有關結構參數。
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