課程設(shè)計(jì)-35kv電網(wǎng)繼電保護(hù)設(shè)計(jì)——距離保護(hù)-wenkub.com
2025-06-03 08:22 本頁(yè)面
【正文】 ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。 Have declared the end of the encounter that haven39。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強(qiáng)心劑，或者說(shuō)，是自以為是的精神寄托罷了。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個(gè)人的時(shí) 候，自己的想法總是特別地清晰。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開(kāi)頭的年齡已經(jīng)到了尾聲。s 21 win. Michel Platini, president of European football39。s antiracism taskforce, is in London for the Football Association39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。要面對(duì)社會(huì)的挑戰(zhàn)，只有不斷的學(xué)習(xí)、實(shí)踐，再學(xué)習(xí)、再實(shí)踐。然后根據(jù)設(shè)計(jì)要求進(jìn)行距離保護(hù)的整定，并且對(duì)其進(jìn)行靈敏度較驗(yàn)。阻抗繼電器本身較長(zhǎng)復(fù)雜，還增設(shè)了振蕩閉鎖裝置，電壓斷線閉鎖裝置，因此距離保護(hù)裝置調(diào)試比較麻煩，可靠性也相對(duì)低些。 車(chē)輛與動(dòng)力工程學(xué)院課程設(shè)計(jì)說(shuō)明書(shū) 16 第四章 距離保護(hù)的評(píng)價(jià) 主要優(yōu)點(diǎn)：能滿足多電源復(fù)雜電網(wǎng)對(duì)保護(hù)動(dòng)作選擇性的要求；阻抗繼電器是同時(shí)反應(yīng)電壓的降低和電流的增大而動(dòng)作的，因此距離保護(hù)較電流保護(hù)有較高的靈敏度。 距離保護(hù) III段的整定計(jì)算和校驗(yàn) (1)動(dòng)作阻抗：按躲開(kāi)最小負(fù)荷阻抗整定； Kzq=1,reK=, relK =， ssK =， I = ZL當(dāng)保護(hù) 2 的 ?段末端發(fā)生短路時(shí)，分支系數(shù)為： =I12/I34=1于是 )10*1*(* 1. ???s e tZ Ω (2)動(dòng)作時(shí)間，與相鄰保護(hù) 2 的 ?段配合，則 車(chē)輛與動(dòng)力工程學(xué)院課程設(shè)計(jì)說(shuō)明書(shū) 15 t1=t239。 車(chē)輛與動(dòng)力工程學(xué)院課程設(shè)計(jì)說(shuō)明書(shū) 14 距離保護(hù)Ⅲ段的動(dòng)作時(shí)間，應(yīng)比與之配合的相鄰設(shè)備保護(hù)動(dòng)作時(shí)間大一個(gè)時(shí)間級(jí)差t? ，但考慮到距離Ⅲ段一般不經(jīng)歷震蕩閉鎖，其動(dòng)作時(shí)間不應(yīng)小于最大的震蕩周期（ ~2s） 。 靈敏度校驗(yàn)。 當(dāng)線路上的負(fù)荷最大且母線電壓最低時(shí)，負(fù)荷阻抗最小，其值為 m a x...m a x..m in..m in.)~(LNLLL IUIUZ ?? 式中 min.. LU 為正常運(yùn)行母線電壓的最低值； max.. LI 為被保護(hù)線路最大負(fù)荷電流； NU.為母線額定電壓。 如 果與相鄰下級(jí)線路距離保護(hù)Ⅱ段配合靈敏系數(shù)不滿足要求，則應(yīng)改為與相鄰下級(jí)線路距離保護(hù)的Ⅲ段相配合?？紤]到各種誤差因素，要求靈敏系數(shù)應(yīng)滿足 ?? ??ABsetsen ZZK 如果 senK 不滿足要求，則距離保護(hù) 1的Ⅱ段應(yīng)改為與相鄰元件的保護(hù)Ⅱ段相配合，計(jì)算方法與上面類(lèi)似。距離Ⅱ段的整定阻抗為：
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