母線區分 的英文怎麼說
中文拼音 [mǔxiànqūfēn]
母線區分
英文
bs bus section-
The main element analysis of whole rocks, the ree analysis and the trace element analysis have been done for the granitoid samples in this area. the chemical composition analysis has been done for the amphiboie and biotite minerals. the epma and x - ray powdered crystal diffraction have been done for k - feldspar, plagioclase, amphiboie, biotite, quartz, magnetite, titanite
對本區花崗巖類樣品進行了全巖主量元素、稀土元素及微量元素分析，對角閃石和黑雲母單礦物進行了化學成分分析，對鉀長石、斜長石、角閃石、黑雲母、及石英、磁鐵礦、磷灰石和榍石進行了電子探針和x射線粉晶衍射分析。The mutual inductor of electric current and voltage mutual inductor play an important role in relay protection. prevent from ct differential to protect and miss movement an important subject that the generatrix is protected on the saturation, put forward two electric current pass zero hour linear to spread person who become put into differential to protect in ct in recent years, avoid ct saturation district, can judge the bus bar trouble correctly
但是在母線區外發生短路故障（特別是故障電流含有大量非周期分量）時， ct會出現飽和現象， ct飽和后，不能正確地傳變一次側電流，從而使二次電流發生嚴重畸變，產生很大的差電流，這樣就容易引起誤動作。防止ct飽和時差動保護誤動作一直是母線保護的一個重要課題，近年來提出的在ct二次電流過零時的線性傳變區投入差動保護，避開ct飽和區，能對母線故障做出正確判斷。The influence of both synchronous generator and the distance from local power plant to load bus on load modeling are analyzed. when the influences are not negligible, the composite induction motor load model can not effectively describe the actual load. besides, the identifiability in this case is analyzed
分析了同步發電機在綜合負荷中所佔的比例、地方發電廠離負荷母線的距離對負荷建模的影響，指出當同步發電機影響必須計及時，通常的感應電動機綜合負荷模型就不能正確描述區域負荷，並對由此引起的可辨識性及建模問題作了分析。The recursive criterion of transient current protection based on mallat wavelet transform is presented in order to meet the real - time demands. the reserch shows deficiency existed in the prevenient principle of transient current protection, so a new improved scheme of transient current protection is proposed. the characteristics of transient protection at different bus distribution capacitance is also analysed in this thesis. the study shows that operate of transient protection is correct when the bus distribution capacitance change. other conclusion include : the trip of transient protection must be locked when the power circuit breaker of transimission line operated, because the trip is incorrect at this time ; the features of transient current and it ' s energy is different between the fault and thunder over - voltage in transimission line, and them can be identified ; the ratio of high frequency component of current in serise capaciters compensation line, svc and hvdc system is far little than fault transient current, so all of them do not affect the working of trasient current protection
應用功率譜估計方法討論了故障高頻暫態噪聲信號在頻率軸上的分佈情況，利用功率譜分析結果實現的非參數化系統辨識方法研究了母線分佈電容對電流高頻暫態信號的衰減特性。論文的後半部分（第五，六，七章）著重分析了現有基於故障電流的暫態保護原理和判據存在的問題，提出了新的實現方案，並討論了暫態電流保護的運行性能。利用多分辨分析和小波分解快速演算法構成的遞推暫態保護判據，可以準確區分故障線路和非故障線路，實現超高速暫態電流保護，計算更為簡單方便，計算速度更快。Three kinds of the usual methods of rotor flux estimation are compared and analyzed, and the method of rotor flux estimation based on the voltage model is studied in detail. and the output phase voltage is reconstructed by means of the dc - bus voltage and the switching states of the inverter, the effect of the dead time and saturating voltage - drop of the switches on flux estimation is discussed. and the method of synchronizing instant speed identification is also studied deeply
本文對三種常用的轉子磁鏈觀測方法進行了對比分析，在此基礎上著重研究了基於電壓模型磁鏈觀測方法，分析了利用直流母線電壓和逆變器三相開關管的狀態進行輸出電壓重構方法，討論了死區時間和開關管飽和壓降對磁鏈觀測結果的影響，深入研究了同步瞬時轉速辨識方法。分享友人