protection n. 1.保護(hù),保衛(wèi),防御,掩護(hù),包庇,照顧 (from; against)。 2.保護(hù)者,防護(hù)物 (against); 〔美俚〕(歹徒向人索取的)保護(hù)費(fèi)。 3.護(hù)照,通行證;〔美國(guó)〕(國(guó)籍)護(hù)照;通行證。 4. 【經(jīng)濟(jì)學(xué)】保護(hù)貿(mào)易制,保護(hù)政策。 protection against cold 防寒用具。 protection against moths [lightning] 除蟲(chóng),避(雷)。 protection at halts 駐軍警戒。 protection on move 行軍警戒。 under the protection of 在…保護(hù)下,受…保護(hù),托…照顧。
Design of microcomputer protection system in gaogang water conservancy hinge 高港水利樞紐微機(jī)保護(hù)系統(tǒng)
Calculation for setting - up of microcomputer protection of the hv asynchronous motors 高壓異步電動(dòng)機(jī)微機(jī)保護(hù)的整定計(jì)算
After detailed analysis , the correct expressions are formulated and what the false expressions will bring about to the microcomputer protection is discussed 這里通過(guò)詳細(xì)的數(shù)學(xué)推導(dǎo),給出了在不同數(shù)學(xué)模型下信號(hào)相量實(shí)部和虛部的具體表達(dá)式,并討論了各種錯(cuò)誤在微機(jī)保護(hù)應(yīng)用中帶來(lái)的問(wèn)題。
Lzct bushing type current transformer is suitable for is suitable for current measurement , metering and microcomputer protection of distribution equipments in 35kv and 10kv ac power system 該型電流互感器的環(huán)型鐵芯和二次繞組采用優(yōu)質(zhì)環(huán)氧樹(shù)脂真空澆注在可阻燃的塑料殼體內(nèi),防潮濕,性能穩(wěn)定,無(wú)需維護(hù)。
In the course of settling new types of transformer microcomputer protection , it is still a key and difficult problem how to prevent protection miss - operating caused by magnetizing inrush when transformer suddenly is closed in no load 在研究新型微機(jī)變壓器保護(hù)過(guò)程中,如何防止變壓器突然空載合閘時(shí)出現(xiàn)的勵(lì)磁涌流所造成的保護(hù)誤動(dòng)作,仍然是最關(guān)鍵和最困難的問(wèn)題。
It not only adapts to the state while only switches act , but also to the state while relay protections act ; in addition , through using electric information collected by microcomputer protection , more accurate results are gained 其主要內(nèi)容為城市電網(wǎng)繼電保護(hù)的配置、繼電保護(hù)的整定值、系統(tǒng)基本參數(shù)等。同時(shí)通過(guò)內(nèi)存中實(shí)時(shí)數(shù)據(jù)庫(kù)的映射,利用scada系統(tǒng)通道向本系統(tǒng)提供實(shí)時(shí)遙信信息和遙側(cè)信息。
The old excitation setting in an _ kang hydro power plant restricts the development of the microcomputer regulator of speed , microcomputer protection and the computer supervisor and control that has altered , has become a bottleneck in improving the level of automation in power plant 安康水電站原勵(lì)磁裝置嚴(yán)重制約已實(shí)施改造的微機(jī)調(diào)速、微機(jī)保護(hù)、計(jì)算機(jī)監(jiān)控作用的發(fā)揮,已成為進(jìn)一步提高電廠整體自動(dòng)化水平的瓶頸。
This thesis chooses b spline wavelet that adapts to the analysis of power system signal , and uses the wavelet transformer to analyze the magnetizing inrush current and inner fault current . a transformer microcomputer protection was designed in this thesis , and in the base of intermission angle principle , a new criterion was established , which pierces through the traditional method with accurate measurement of intermission angle , but analyses the wave by wavelet transform . this criterion is lower in hardware , so it will be realized in the existing hardware 本文選擇適合電力系統(tǒng)信號(hào)分析的b樣條函數(shù)作為母小波,對(duì)勵(lì)磁涌流和內(nèi)部故障電流進(jìn)行小波分析,并設(shè)計(jì)微機(jī)型變壓器保護(hù)基本配置,在以往間斷角原理鑒別勵(lì)磁涌流的基礎(chǔ)上,突破傳統(tǒng)精確測(cè)量勵(lì)磁涌流間斷角的方法,直接對(duì)信號(hào)小波變換后的波形進(jìn)行分析,建立一個(gè)新的鑒別勵(lì)磁涌流判據(jù),該判據(jù)對(duì)硬件要求不高,可以在現(xiàn)有一般硬件平臺(tái)上實(shí)現(xiàn);并編寫(xiě)以b樣條函數(shù)為母小波的小波變換判據(jù)算法程序。
The development about a lot of protection measure to synchronous motor and many kinds of protection device inside and outside our country have been investigated in this thesis , and moreover , a microcomputer protection device for large - scale synchronous motor have been designed in this thesis 本文調(diào)查分析了國(guó)內(nèi)外同步電動(dòng)機(jī)各種保護(hù)方法和各類保護(hù)裝置的研究發(fā)展?fàn)顩r,結(jié)合現(xiàn)實(shí)際情況,設(shè)計(jì)并初步實(shí)現(xiàn)了一種性能良好的、實(shí)用的、完全能滿足現(xiàn)階段大中型同步電動(dòng)機(jī)保護(hù)需要的微機(jī)保護(hù)裝置。