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style="display:none"> <li id="5hlvxzllpl3" class="left_nav_xl"><a href="/SonList-1408386.html" title="壓敏電阻測試儀">壓敏電阻測試儀</a></li> </div> </ul> </ul> </div> <div id="5hlvxzllpl3" class="page-right"> <div id="5hlvxzllpl3" class="onurl"> <a href="/"><img src="/Skins/333987/images/home.png"></a><a href="/">網(wǎng)站首頁</a>><a href="/article.html">技術(shù)文章</a> > 微機繼電保護測試儀使用方法</div> <div id="5hlvxzllpl3" class="page-news"> <div id="5hlvxzllpl3" class="newshowheader"> <h1 class="nd_title">微機繼電保護測試儀使用方法</h1> <div id="5hlvxzllpl3" class="article-info"> <span> 瀏覽：</span> 1452<span id="5hlvxzllpl3" class="split">|</span> <span id="publishtime">更新時間：2021-05-26</span> <span id="5hlvxzllpl3" class="split">|</span> </div> </div> <div id="5hlvxzllpl3" class="page-newshow"> <p><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">微機繼電保護測試儀試驗方法步驟</span></p><p><span style="background-color:rgb(255, 255, 255); color:rgb(24, 24, 24)">微機繼電保護測試儀</span><span style="background-color:rgb(255, 255, 255); color:rgb(24, 24, 24); font-family:微軟雅黑,arial,宋體; font-size:15px">（又稱</span><span style="background-color:rgb(255, 255, 255); color:rgb(24, 24, 24)">繼電保護測試儀</span><span style="background-color:rgb(255, 255, 255); color:rgb(24, 24, 24); font-family:微軟雅黑,arial,宋體; font-size:15px">）內(nèi)部的交直流電壓、電流源采用了新電源技術(shù)，使儀器在電路設(shè)計、器件選型、面板布局、內(nèi)部結(jié)構(gòu)設(shè)計上達到較高水平。該繼電保護校驗儀具有功能完善、選材優(yōu)良、測試項目數(shù)據(jù)清晰、操作簡單等優(yōu)點，是電力繼保部門的首要選擇設(shè)備</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">6.2.1微機繼電保護測試儀交、直流試驗 </span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><img alt="微機繼電保護測試儀交流試驗" src="http://www.yzceshi.com/Upload/Pic/2012938330848.jpg" style="border:0px; font-family:宋體,tahoma,arial; font-size:14px; margin:0px; max-width:100%; padding:0px" /><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">該項測試模塊可用于交流電壓、電流及功率繼電器及各種保護裝置進行自動或手動試驗。也可用于各種直流電壓、直流電流繼電器的自動或手動試驗。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">該程序是一通用型試驗模塊，是所有程序中使用功能 </span>的模塊。各相電壓、電流的幅值，相位及頻率均可自行設(shè)定。并可按各自步長按設(shè)定的時間進行任意變化，以對各種繼電器及保護裝置進行任意試驗。測定動作值、返回值、動作時間等。試驗界面如上圖：<br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">電壓初值為57.73V、電流、相位互差120°、頻率50Hz。直流可變否標志：在直流一欄內(nèi)如果選“√”，表示該相輸出直流?？勺兎褚粰谌邕x“√”表示該參數(shù)將參與變化，不選取則為固定不變。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">自動試驗：程序輸出時，參與變化的量將按設(shè)定步長和間隔時間自動變化，其他量值固定不變。繼電器動作則停止輸出，程序自動返回。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">手動試驗：程序連續(xù)輸出當前值，當點擊“增加”按鈕時，可變的量即增加一個步長，當點擊“減小”按鈕時，可變的量即減小一個步長。如果繼電器動作，可記錄動作值和動作時間，這時測試儀并沒有停止輸出，操作者可反方向變化參數(shù)，直到繼電器返回，記錄返回值和返回時間。所以手動試驗可用來做返回值。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">試驗間隔時間：自動試驗時每變化一個步長的間隔時間。打開參數(shù)、保存參數(shù)、恢復數(shù)據(jù)，界面上設(shè)置的數(shù)據(jù)，可以用“保存參數(shù)”保存在硬盤文件中，以后可以用“打開參數(shù)”調(diào)出，界面上的數(shù)據(jù)在試驗時增減后被改變，可用“恢復參數(shù)”將數(shù)據(jù)恢復為初始值。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">試驗時，計算機自動計算并顯示線電壓、負序電壓、零序電壓等數(shù)據(jù)，并顯示各相電流、電壓的矢量圖。矢量圖可用“放大鏡”進行放大和縮小。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">注意：1、交流電壓每</span><span style="color:#000000"><span style="font-family:arial; font-size:15px">相</span>大為75V，當需要較高輸出電壓時，可將兩通道串聯(lián)使用。如VA輸出<span style="font-size:16px">75V。相位0°。VB輸出75V，相位180°。則VAB輸出為150V。<br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="font-family:arial"> 2、直流電壓每相</span>大為±110V。若所需電壓大于110V時，可將兩相串聯(lián)使用。如將VA設(shè)為110V，VB設(shè)為－110V。則VAB可輸出220V。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="font-family:arial; font-size:15px"> 3、交流電流單相為30A。當所需電流大于30A時?？刹捎脙上嗷蛉嚯娏鞑⒙?lián)輸出，但各相電流必須設(shè)為同相位。請盡量用較粗，較短的線，以減小回路電阻。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="font-family:arial; font-size:15px">3﹑界面</span></span>下面一行是信息提示欄，當顯示設(shè)備連接正常，說明程序可以輸出。當顯示設(shè)備沒有連接，說明電腦與主機沒連上，須重新進行聯(lián)機。保護動作時間也會顯示在此欄。</p><p><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px"><img alt="" src="https://img76.chem17.com/9/20201220/637440495238456716832.jpg" style="height:544px; width:800px" /></span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">6.2.2 微機繼電保護測試儀整組試驗 </span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><img alt="微機繼電保護測試儀" src="http://www.yzceshi.com/Upload/Pic/20129383351560.jpg" style="border:0px; font-family:宋體,tahoma,arial; font-size:14px; margin:0px; max-width:100%; padding:0px" /><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">該軟件用于模擬輸電線路各種故障情況。用于試驗保護裝置的跳閘、重合及后加速等功能。適用范圍：南自，南瑞，許繼，四方。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">故障類型可選AN、BN、CN、AB、BC、CA、ABN、BCN、CAN、ABC。整定阻抗可以Z/φ方式輸入或R、X方式輸入。以一種方式輸入，另一種方式的值計算機自動算出。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">短路阻抗=阻抗系數(shù)×整定阻抗。以此值作為短路點阻抗進行故障模擬。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">零序補償系數(shù)K0=（Z0/Z1-1）/3，一般K0取KX。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">測試原理：按時間控制和接點控制兼容方式，接點優(yōu)先的原則。如果接點動作則轉(zhuǎn)入下一狀態(tài)，如果接點不動則按時轉(zhuǎn)入下一狀態(tài)。有時現(xiàn)場沒有跳閘節(jié)點和重合節(jié)點，這時可以將故障時間設(shè)成略大于保護動作時間，跳閘后狀態(tài)時間，設(shè)為略大于重合閘的動作時間，而</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">保護的動作時間和重合閘動作時間可由保護屏上直接讀出。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">合閘角：故障發(fā)生時刻A相電壓的初相角。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">PT安裝位置：模擬一次側(cè)電壓互感器是安裝在母線側(cè)還是線路側(cè)。PT安裝于母線側(cè)時故障相斷開后該相電流為零，電壓恢復到正常相電壓57.73；PT安裝于線路側(cè)時，故障相斷開后，該相電流及電壓均為零。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">故障方式有三種：瞬時性、*性、轉(zhuǎn)換性。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">轉(zhuǎn)換性故障可分為前轉(zhuǎn)換和后轉(zhuǎn)換。前轉(zhuǎn)換是指故障跳開后，重合前發(fā)生轉(zhuǎn)換性故障。此時保護應(yīng)三跳。不再重合。后轉(zhuǎn)換是指故障跳開后，重合閘動作，重合后發(fā)生轉(zhuǎn)換性故障。這時相當于*性故障。只是故障相別不一樣。這時保護應(yīng)該是加速永跳。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">各種狀態(tài)輸出順序：正常態(tài)→故障態(tài)→跳閘后狀態(tài)→重合→三跳（加速跳）。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">接線方式和操作方法同脫機軟件的“整組試驗”。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">如出口接點沒有，也可接一端帶電位的空接點，如圖所示：</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">6.2.3階梯阻抗</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><img alt="微機繼電保護測試儀" src="http://www.yzceshi.com/Upload/Pic/20129383442124.jpg" style="border:0px; font-family:宋體,tahoma,arial; font-size:14px; margin:0px; max-width:100%; padding:0px" /><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px"> 用于線路保護定值校驗，用戶輸入Z1、Z2、Z3的三段阻抗定值。阻抗系數(shù)0.7、0.95、1.05，用戶可修改。規(guī)程規(guī)定0.95倍可靠動作，1.05倍下一段動作。通過測量動作時間可以判斷是哪一段動作。正常態(tài)時間大于保護整組復歸時間，一般取20秒，故障態(tài)時間應(yīng)大于阻抗Ⅲ段動作時間。適用范圍：南自，南瑞，許繼，四方。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">VA、VB、VC、VN、IA、IB、IC、IN接入保護屏相應(yīng)端子，保護只投距離壓板，距離出口空接點，接入測試儀的開關(guān)量輸入通道中的任一路。如出口接點沒有，也可接一端帶電位的空接點，如圖所示：</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">6.2.4 工頻變化量距離保護 </span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">本程序分別模擬U相、V相、W相單相接地瞬時故障和uv、vw、wu相間瞬時故障，模擬故障電流固定，模擬故障前電壓為額定電壓57.73V，模擬故障時間一般為100-150ms，單相接地故障時，短路電壓V=（1+K）I×ZD+（1－1.05m）×Un。相間短路時故障電壓U=2×I×ZD+（1－1.05m）× Un，式中m為系數(shù)，其值分別為0.9和1.2，對于微機保護，當m=0.9時，D++出口（方向元件出口），當m=1.2時，DZ、D++都應(yīng)出口，DZ為突變量距離出口，DZ先動作，可投入主保護及零序保護，其余保護應(yīng)退出。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">ZD——工頻變化量距離保護定值。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">工頻變化量距離保護在m=1.2倍時，應(yīng)可靠動作。在m=0.9時，應(yīng)可靠不動作。適用范圍：南自，南瑞，許繼，四方。如出口接點沒有，也可接一端帶電位的空接點，如圖所示：</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">6.2.5差動試驗</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><img alt="微機繼電保護測試儀" src="http://www.yzceshi.com/Upload/Pic/2012938364517.jpg" style="border:0px; font-family:宋體,tahoma,arial; font-size:14px; margin:0px; max-width:100%; padding:0px" /><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px"> 本程序用于主變差動保護試驗。適用范圍：南自，南瑞，許繼，四方。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">程序定義I1=Ia、I2=Ib，I1為1側(cè)電流（例如高壓側(cè)），I2為2側(cè)電流（例如低壓側(cè)），I1、I2的頻率可定義為基波，二次、三次諧波等。初值、終值、步長、相位用戶可自行設(shè)定，由于測試儀加進去的電流只是加到高低壓側(cè)，并不是真正的動作電流和制動電流，所以，動作電流Id和制動電流Iz需按一定的公式進行折算才能形成，界面上提供了一些公式，用戶根據(jù)保護廠家提供的公式進行選擇。由于I１、I2都在變化，可形成一個二維數(shù)組，并可在直角坐標上描出制動曲線。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px"> 本試驗必須將保護出口接點接入測試儀的開入通道，測量點數(shù)可由起始電流和終止電流來決定，對某些變壓器差動保護由于計算公式不一樣，本程序不一定涵蓋，建議采用“交流試驗”程序用手動方法來進行試驗，將會更方便更直觀一些。使用方法可參照脫機軟件的“差動試驗”程序。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">6.2.6阻抗相位特性</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px"> 微機繼電保護測試儀本程序用于阻抗繼電器的相位特性測試。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span style="color:rgb(0, 0, 0); font-family:arial; font-size:15px">0-360°全程搜索，通過移動鼠標選擇掃描中心，掃描半徑，和掃描步長，均以歐姆表示，掃描范圍一般為100%，正常態(tài)時間應(yīng)大于保護復歸時間，故障態(tài)時間應(yīng)大于保護動作時間，角度步長一般可設(shè)10－15度，選擇開始試驗，先做掃描中心這一點，如果保護不動作，說明掃描中心不在動作區(qū)，程序彈出請重新選擇掃描中心，如果掃描中心動作，則按掃描步長進行掃描，直到不動作區(qū)為止，再增加一個角度步長，重新掃描，直到不動作區(qū)為止，這樣就在掃描中心附近形成了一個明顯的動作區(qū)，這個動作區(qū)的形狀是任意的，可以是圓形、四邊形或多邊形等，這樣就可以試驗圓阻抗和多邊形阻抗的相位特性。</span><br style="font-family: 宋體, Tahoma, Arial; font-size: 14px;" /><span 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