諧振原(yuan)因 隨著工(gong)業的飛速發展(zhan)，非線(xian)性電(dian)力負荷大量增(zeng)加，某些(xie)負荷不(bu)僅產生(sheng)諧波(bo)，還引起供電(dian)電(dian)壓波(bo)動與(yu)閃變，甚至引起三相電(dian)壓不(bu)平衡。引起(qi)三相電壓不平衡的原因有多種，如：單相接地(di)、斷(duan)線諧振(zhen)等，運(yun)行管理人(ren)員只有將(jiang)其正確區分開(kai)來，才能快速處理。

一(yi)(yi)(yi)、 斷(duan)線(xian)(xian)(xian)(xian)(xian)故(gu)障 如果一(yi)(yi)(yi)相(xiang)斷(duan)線(xian)(xian)(xian)(xian)(xian)但(dan)未(wei)接(jie)地(di)，或(huo)斷(duan)路器、隔離開關一(yi)(yi)(yi)相(xiang)未(wei)接(jie)通，電(dian)(dian)(dian)(dian)壓互感器保(bao)險(xian)絲(si)熔斷(duan)均造成三相(xiang)參數不對稱。上一(yi)(yi)(yi)電(dian)(dian)(dian)(dian)壓等級線(xian)(xian)(xian)(xian)(xian)路一(yi)(yi)(yi)相(xiang)斷(duan)線(xian)(xian)(xian)(xian)(xian)時，下(xia)一(yi)(yi)(yi)電(dian)(dian)(dian)(dian)壓等級的電(dian)(dian)(dian)(dian)壓表現為三個相(xiang)電(dian)(dian)(dian)(dian)壓都降低，其中(zhong)一(yi)(yi)(yi)相(xiang)較(jiao)(jiao)低，另兩相(xiang)較(jiao)(jiao)高(gao)但(dan)二者電(dian)(dian)(dian)(dian)壓值接(jie)近(jin)。本(ben)級線(xian)(xian)(xian)(xian)(xian)路斷(duan)線(xian)(xian)(xian)(xian)(xian)時，斷(duan)線(xian)(xian)(xian)(xian)(xian)相(xiang)電(dian)(dian)(dian)(dian)壓為零，未(wei)斷(duan)線(xian)(xian)(xian)(xian)(xian)相(xiang)電(dian)(dian)(dian)(dian)壓仍(reng)為相(xiang)電(dian)(dian)(dian)(dian)壓。

二、接(jie)(jie)地(di)故(gu)(gu)障 當線(xian)路一(yi)相(xiang)斷線(xian)并單相(xiang)接(jie)(jie)地(di)時，雖引(yin)起三相(xiang)電(dian)(dian)(dian)壓(ya)不平衡，但接(jie)(jie)地(di)后電(dian)(dian)(dian)壓(ya)值(zhi)不改變。單相(xiang)接(jie)(jie)地(di)分為(wei)金屬(shu)性接(jie)(jie)地(di)和非金屬(shu)性接(jie)(jie)地(di)兩(liang)種(zhong)。金屬(shu)性接(jie)(jie)地(di)，故(gu)(gu)障相(xiang)電(dian)(dian)(dian)壓(ya)為(wei)零(ling)或接(jie)(jie)近(jin)零(ling)，非故(gu)(gu)障相(xiang)電(dian)(dian)(dian)壓(ya)升高1.732倍(bei)，且持久不變；非金屬(shu)性接(jie)(jie)地(di)，接(jie)(jie)地(di)相(xiang)電(dian)(dian)(dian)壓(ya)不為(wei)零(ling)而是降低為(wei)某一(yi)數(shu)值(zhi)，其他兩(liang)相(xiang)升高不到1.732倍(bei)。

諧振引起三相電壓不平衡有兩種

一種是基頻諧(xie)振，特征類似于單相(xiang)接地(di)，即一相(xiang)電(dian)(dian)壓(ya)降低，另兩(liang)相(xiang)電(dian)(dian)壓(ya)升(sheng)高，查(cha)(cha)找故(gu)(gu)障原因時不易(yi)找到故(gu)(gu)障點，此(ci)時可檢查(cha)(cha)特殊用戶，若不是接地(di)原因，可能就是諧(xie)振引起的。

另一種是(shi)分頻諧振或(huo)高(gao)頻諧振，特征是(shi)三相電壓同時升高(gao)。

另外，還要注意，空投母線切除部(bu)分線路(lu)或(huo)單(dan)相(xiang)接(jie)地故(gu)障消失(shi)時，如出現(xian)接(jie)地信號(hao)，且(qie)一相(xiang)、兩相(xiang)或(huo)三相(xiang)電(dian)壓(ya)(ya)(ya)超過(guo)線電(dian)壓(ya)(ya)(ya)，電(dian)壓(ya)(ya)(ya)表指針打到頭，并同(tong)時緩(huan)慢(man)移動，或(huo)三相(xiang)電(dian)壓(ya)(ya)(ya)輪(lun)流升高(gao)超過(guo)線電(dian)壓(ya)(ya)(ya)，遇到這種情況，一般均屬諧振引(yin)起。

三相不(bu)平衡的危害和影響

對變壓(ya)(ya)(ya)(ya)器(qi)(qi)的危害(hai)。在(zai)生產(chan)、生活(huo)用電中(zhong)，三相(xiang)負(fu)載(zai)(zai)不(bu)平衡時，使變壓(ya)(ya)(ya)(ya)器(qi)(qi)處于不(bu)對稱運行狀態。造成變壓(ya)(ya)(ya)(ya)器(qi)(qi)的損(sun)耗增(zeng)大(包括(kuo)空載(zai)(zai)損(sun)耗和負(fu)載(zai)(zai)損(sun)耗)。根據變壓(ya)(ya)(ya)(ya)器(qi)(qi)運行規程規定(ding)，在(zai)運行中(zhong)的變壓(ya)(ya)(ya)(ya)器(qi)(qi)中(zhong)性線電流(liu)不(bu)得超過(guo)變壓(ya)(ya)(ya)(ya)器(qi)(qi)低(di)壓(ya)(ya)(ya)(ya)側額定(ding)電流(liu)的25%。此(ci)外，三相(xiang)負(fu)載(zai)(zai)不(bu)平衡運行會(hui)造成變壓(ya)(ya)(ya)(ya)器(qi)(qi)零序電流(liu)過(guo)大，局部金屬件(jian)升溫增(zeng)高，甚至會(hui)導(dao)致變壓(ya)(ya)(ya)(ya)器(qi)(qi)燒(shao)毀。

對(dui)用電(dian)(dian)設備的影響。三相(xiang)(xiang)電(dian)(dian)壓不(bu)(bu)(bu)平衡(heng)的發(fa)生(sheng)將導致(zhi)達到數倍(bei)電(dian)(dian)流(liu)(liu)不(bu)(bu)(bu)平衡(heng)的發(fa)生(sheng)。誘導電(dian)(dian)動(dong)(dong)機中(zhong)(zhong)逆(ni)扭矩增(zeng)(zeng)加，從(cong)而(er)使(shi)電(dian)(dian)動(dong)(dong)機的溫度上升(sheng)，效率下降，能耗增(zeng)(zeng)加，發(fa)生(sheng)震動(dong)(dong)，輸出虧耗等影響。各相(xiang)(xiang)之間(jian)的不(bu)(bu)(bu)平衡(heng)會導致(zhi)用電(dian)(dian)設備使(shi)用壽(shou)命縮短，加速設備部(bu)件更換(huan)頻率，增(zeng)(zeng)加設備維護的成(cheng)本。斷路(lu)器允(yun)許(xu)電(dian)(dian)流(liu)(liu)的余量減少，當負載(zai)變更或交替時(shi)容易發(fa)生(sheng)超載(zai)、短路(lu)現象。中(zhong)(zhong)性(xing)線中(zhong)(zhong)流(liu)(liu)入過(guo)大的不(bu)(bu)(bu)平衡(heng)電(dian)(dian)流(liu)(liu)，導致(zhi)中(zhong)(zhong)性(xing)線增(zeng)(zeng)粗(cu)。

對(dui)線損的(de)影響(xiang)。三(san)相(xiang)四線制結(jie)線方式，當(dang)(dang)三(san)相(xiang)負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)平衡時線損最小；當(dang)(dang)一(yi)(yi)相(xiang)負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)重(zhong)，兩相(xiang)負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)輕(qing)的(de)情(qing)況(kuang)(kuang)下(xia)線損增量較小；當(dang)(dang)一(yi)(yi)相(xiang)負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)重(zhong)，一(yi)(yi)相(xiang)負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)輕(qing)，而第三(san)相(xiang)的(de)負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)為平均負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)的(de)情(qing)況(kuang)(kuang)下(xia)線損增量較大(da)；當(dang)(dang)一(yi)(yi)相(xiang)負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)輕(qing)，兩相(xiang)負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)重(zhong)的(de)情(qing)況(kuang)(kuang)下(xia)線損增量最大(da)。當(dang)(dang)三(san)相(xiang)負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)不(bu)平衡時，無(wu)論何(he)種負(fu)(fu)(fu)荷(he)(he)(he)(he)(he)分配(pei)情(qing)況(kuang)(kuang)，電流不(bu)平衡度越大(da)，線損增量也越大(da)。

三(san)相不平衡的危害及解決辦法

一、三相電壓或(huo)電流不平衡等因素(su)產生的主要危(wei)害(hai)：

1、旋(xuan)轉(zhuan)電(dian)(dian)機在不對(dui)稱狀態下(xia)運(yun)行，會(hui)使轉(zhuan)子產生附(fu)加損(sun)耗及(ji)發熱(re)，從而(er)引起電(dian)(dian)機整體或局部升溫，此外反(fan)向磁場產生附(fu)加力矩(ju)會(hui)使電(dian)(dian)機出(chu)現振動。對(dui)發電(dian)(dian)機而(er)言(yan)，在定子中還會(hui)形成一系列高次諧波。

2、引起以負序(xu)分量為啟(qi)動元件的多(duo)種保護發生誤(wu)動作，直接(jie)威脅電網運行。

3、不平衡電壓使硅整流設(she)備出現非特(te)征性(xing)諧波。

4、對發電(dian)(dian)機、變(bian)壓器而言，當三相(xiang)負荷不平(ping)衡時(shi)，如(ru)控制最(zui)大(da)相(xiang)電(dian)(dian)流(liu)為(wei)額(e)定值，則其(qi)余兩相(xiang)就不能滿載，因而設備(bei)利(li)用率下降，反之如(ru)要(yao)維持額(e)定容量，將(jiang)會造(zao)成負荷較大(da)的一相(xiang)過負荷，而且還會出現磁路不平(ping)衡致使波(bo)形畸變(bian)，設備(bei)附加損耗增加等(deng)。

二、由(you)不(bu)(bu)對稱負荷(he)引起的電網三(san)相電壓不(bu)(bu)平衡(heng)可以采取的解決辦法：

1、將不(bu)(bu)對稱負荷分散接(jie)(jie)在不(bu)(bu)同的(de)(de)供電點，以(yi)減少集中連接(jie)(jie)造成不(bu)(bu)平衡(heng)度嚴重超標的(de)(de)問題。

2、使(shi)用交叉換相等辦法使(shi)不對稱(cheng)負(fu)荷合(he)理分配(pei)到(dao)各相，盡(jin)量使(shi)其平(ping)衡化。

3、加大(da)負(fu)荷接入點(dian)的(de)短路容量，如改(gai)變網絡或(huo)提高供電(dian)(dian)電(dian)(dian)壓級別提高系統承受(shou)不平衡負(fu)荷的(de)能(neng)力。

解決(jue)三(san)相負荷(he)不平衡的(de)幾點措施

一、重視低(di)壓(ya)配(pei)電(dian)(dian)網(wang)的規(gui)(gui)劃工作，加強與(yu)地(di)方政府(fu)規(gui)(gui)劃等(deng)部門的工作溝通，避(bi)免(mian)配(pei)電(dian)(dian)網(wang)建設無序，尤(you)其避(bi)免(mian)在低(di)壓(ya)配(pei)電(dian)(dian)網(wang)中(zhong)出現(xian)頭(tou)痛醫頭(tou)，腳(jiao)痛醫腳(jiao)的局(ju)面，在配(pei)電(dian)(dian)網(wang)建設和(he)(he)改造當(dang)中(zhong)對低(di)壓(ya)臺(tai)區(qu)進行(xing)合理的分區(qu)分片供(gong)電(dian)(dian)，配(pei)變布點盡(jin)量接近負荷中(zhong)心，避(bi)免(mian)扇型(xing)供(gong)電(dian)(dian)和(he)(he)迂回(hui)供(gong)電(dian)(dian)，配(pei)電(dian)(dian)網(wang)絡(luo)的建設要遵循“小容量、多布點、短半徑”的配(pei)變選址原(yuan)則。

二、在(zai)(zai)對(dui)采用(yong)低(di)(di)壓三(san)相(xiang)四線(xian)制供(gong)電(dian)(dian)的地(di)區，要積極爭(zheng)取對(dui)有條(tiao)件的配電(dian)(dian)臺區采用(yong)3芯或(huo)者(zhe)4芯電(dian)(dian)纜(lan)或(huo)者(zhe)用(yong)低(di)(di)壓集束導(dao)線(xian)供(gong)電(dian)(dian)至用(yong)戶(hu)端，這樣可(ke)以在(zai)(zai)低(di)(di)壓線(xian)路(lu)施工(gong)(gong)中最大程度(du)的避免(mian)三(san)相(xiang)負荷出現(xian)偏相(xiang)的出現(xian)，同時(shi)要做好(hao)低(di)(di)壓裝表工(gong)(gong)作(zuo)，單相(xiang)電(dian)(dian)表在(zai)(zai)A、B、C三(san)相(xiang)的分布盡(jin)量均(jun)勻，避免(mian)出現(xian)單相(xiang)電(dian)(dian)只掛接在(zai)(zai)一相(xiang)或(huo)者(zhe)兩相(xiang)上，在(zai)(zai)線(xian)路(lu)末端造成(cheng)負荷偏相(xiang)。

三(san)(san)、在低(di)壓(ya)配電(dian)(dian)(dian)(dian)網(wang)零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)采用(yong)多點(dian)(dian)接地，降低(di)零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)能(neng)損(sun)(sun)耗(hao)。目前(qian)由(you)(you)于(yu)(yu)三(san)(san)相(xiang)負(fu)荷(he)的(de)(de)(de)(de)分布(bu)不(bu)平(ping)衡，導(dao)致了(le)零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)出(chu)現電(dian)(dian)(dian)(dian)流，按照規程要求零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)流不(bu)得超過(guo)相(xiang)線(xian)(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)流的(de)(de)(de)(de)25%，在實際運行當中(zhong)，由(you)(you)于(yu)(yu)零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)導(dao)線(xian)(xian)(xian)(xian)(xian)截(jie)面(mian)較細，電(dian)(dian)(dian)(dian)阻值較相(xiang)同長度的(de)(de)(de)(de)相(xiang)線(xian)(xian)(xian)(xian)(xian)大(da)(da)，零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)流過(guo)大(da)(da)在導(dao)線(xian)(xian)(xian)(xian)(xian)上也會造(zao)(zao)成(cheng)一(yi)定比例的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)能(neng)損(sun)(sun)耗(hao)，所以建議在低(di)壓(ya)配電(dian)(dian)(dian)(dian)網(wang)公用(yong)主零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)采用(yong)多點(dian)(dian)接地，降低(di)零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)能(neng)損(sun)(sun)耗(hao)，避免因為負(fu)荷(he)不(bu)平(ping)衡出(chu)現的(de)(de)(de)(de)零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)電(dian)(dian)(dian)(dian)流產(chan)生(sheng)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)嚴重危(wei)及(ji)人(ren)身安全，而且(qie)通過(guo)多點(dian)(dian)接地，減低(di)了(le)因為發熱(re)等原因造(zao)(zao)成(cheng)的(de)(de)(de)(de)零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)斷股斷線(xian)(xian)(xian)(xian)(xian)，使得用(yong)戶使用(yong)的(de)(de)(de)(de)相(xiang)電(dian)(dian)(dian)(dian)壓(ya)升高，損(sun)(sun)壞(huai)家(jia)用(yong)電(dian)(dian)(dian)(dian)器。此外對于(yu)(yu)零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)損(sun)(sun)耗(hao)問(wen)題，在目前(qian)一(yi)般低(di)壓(ya)電(dian)(dian)(dian)(dian)纜(lan)中(zhong)，零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)(de)截(jie)面(mian)為相(xiang)線(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)(de)1/2，電(dian)(dian)(dian)(dian)阻值大(da)(da)造(zao)(zao)成(cheng)了(le)在三(san)(san)相(xiang)負(fu)荷(he)不(bu)平(ping)衡時，零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)損(sun)(sun)耗(hao)加(jia)大(da)(da)，為此可以考(kao)慮到適當增大(da)(da)零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)(de)導(dao)線(xian)(xian)(xian)(xian)(xian)截(jie)面(mian)，例如采用(yong)五芯(xin)電(dian)(dian)(dian)(dian)纜(lan)，每相(xiang)用(yong)一(yi)個(ge)芯(xin)線(xian)(xian)(xian)(xian)(xian)而零(ling)(ling)(ling)線(xian)(xian)(xian)(xian)(xian)則用(yong)兩(liang)個(ge)芯(xin)線(xian)(xian)(xian)(xian)(xian)。

四、對單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)負(fu)(fu)荷占較大(da)比(bi)重的(de)(de)(de)(de)供電(dian)(dian)地(di)區(qu)積極(ji)推廣(guang)單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)變(bian)供電(dian)(dian)。目(mu)(mu)前(qian)在(zai)城市(shi)居民小(xiao)區(qu)內大(da)部分的(de)(de)(de)(de)負(fu)(fu)載電(dian)(dian)器是采用單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)電(dian)(dian)，由于(yu)線(xian)路負(fu)(fu)荷大(da)多為動(dong)力、照明混載，而電(dian)(dian)氣設備使用的(de)(de)(de)(de)同(tong)時率較低，這(zhe)樣使得(de)低壓(ya)三(san)(san)相(xiang)(xiang)(xiang)(xiang)負(fu)(fu)荷在(zai)實際(ji)運行中的(de)(de)(de)(de)不平(ping)衡的(de)(de)(de)(de)幅度(du)更大(da)。另外從目(mu)(mu)前(qian)農(nong)村的(de)(de)(de)(de)生(sheng)活(huo)用電(dian)(dian)情況看，在(zai)很多欠(qian)發達(da)和(he)不發達(da)地(di)區(qu)的(de)(de)(de)(de)農(nong)村存在(zai)著(zhu)人均用電(dian)(dian)量(liang)小(xiao)，居住(zhu)分散，供電(dian)(dian)線(xian)路長等問題，對這(zhe)些(xie)地(di)區(qu)可以(yi)考慮到對于(yu)用戶較分散、用電(dian)(dian)負(fu)(fu)荷主要(yao)以(yi)照明為主、負(fu)(fu)荷不大(da)的(de)(de)(de)(de)情況，采用采用單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)變(bian)壓(ya)器供電(dian)(dian)的(de)(de)(de)(de)方(fang)式(shi)，以(yi)達(da)減少損耗和(he)建設資金的(de)(de)(de)(de)目(mu)(mu)的(de)(de)(de)(de)。目(mu)(mu)前(qian)單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)變(bian)壓(ya)器損耗比(bi)同(tong)容量(liang)三(san)(san)相(xiang)(xiang)(xiang)(xiang)變(bian)壓(ya)器減少15％～20％，有的(de)(de)(de)(de)廠家生(sheng)產的(de)(de)(de)(de)單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)變(bian)在(zai)低壓(ya)側可以(yi)引出380V和(he)220V兩(liang)種電(dian)(dian)壓(ya)等級，同(tong)時在(zai)一些(xie)地(di)區(qu)也(ye)已(yi)開展利用多臺單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)變(bian)向三(san)(san)相(xiang)(xiang)(xiang)(xiang)負(fu)(fu)荷供電(dian)(dian)的(de)(de)(de)(de)試點，為使用單(dan)(dan)相(xiang)(xiang)(xiang)(xiang)變(bian)供電(dian)(dian)提(ti)供了更加廣(guang)闊的(de)(de)(de)(de)空(kong)間。

五、積(ji)極開(kai)展(zhan)變壓(ya)器負荷(he)(he)(he)實(shi)(shi)際(ji)測(ce)量和(he)調整工作(zuo)。配(pei)(pei)變的(de)負荷(he)(he)(he)實(shi)(shi)測(ce)工作(zuo)看似簡單(dan)，但是(shi)在(zai)實(shi)(shi)際(ji)工作(zuo)中有幾點(dian)需要(yao)(yao)(yao)注(zhu)意(yi)，一(yi)是(shi)實(shi)(shi)測(ce)工作(zuo)不能簡單(dan)地(di)測(ce)量配(pei)(pei)變低壓(ya)側Ａ、B、C三相引出線(xian)(xian)的(de)相電(dian)流(liu)(liu)，而且(qie)要(yao)(yao)(yao)測(ce)量零線(xian)(xian)上(shang)的(de)電(dian)流(liu)(liu)，或(huo)者是(shi)測(ce)量零線(xian)(xian)（排）對地(di)電(dian)壓(ya)，從而可以更好地(di)比較出三相負荷(he)(he)(he)的(de)不平衡(heng)情況，二是(shi)實(shi)(shi)測(ce)工作(zuo)要(yao)(yao)(yao)向(xiang)低壓(ya)配(pei)(pei)電(dian)線(xian)(xian)路的(de)末端和(he)分支端延伸(shen)，這樣可以進一(yi)步發現不平衡(heng)負荷(he)(he)(he)的(de)出現地(di)點(dian)，確定(ding)調荷(he)(he)(he)點(dian)，三是(shi)負荷(he)(he)(he)實(shi)(shi)測(ce)工作(zuo)既(ji)要(yao)(yao)(yao)定(ding)期(qi)開(kai)展(zhan)也要(yao)(yao)(yao)不定(ding)期(qi)開(kai)展(zhan)，尤其是(shi)在(zai)大的(de)用戶負荷(he)(he)(he)投運和(he)在(zai)高峰負荷(he)(he)(he)期(qi)間(jian)，要(yao)(yao)(yao)增加實(shi)(shi)測(ce)的(de)次數，通過及(ji)時的(de)測(ce)量配(pei)(pei)變低壓(ya)出線(xian)(xian)和(he)接近用戶端的(de)低壓(ya)線(xian)(xian)路電(dian)流(liu)(liu)，便于(yu)準確地(di)了解設備(bei)的(de)運行情況，做(zuo)好負荷(he)(he)(he)的(de)均衡(heng)合理分配(pei)(pei)。

掃(sao)一(yi)掃(sao)二維碼了解(jie)更多詳情：

更多詳情請咨詢安徽得潤電氣技術有限公司