伦理片92伦理午夜_公用小荡货芊芊_欧美 国产 亚洲视频_国产成人aaaaa级毛片

在(zai)(zai)電(dian)(dian)(dian)(dian)力系統(tong)中(zhong)，諧(xie)(xie)(xie)(xie)振(zhen)有(you)(you)三種(zhong)不(bu)同類(lei)型(xing)：低頻(pin)(pin)諧(xie)(xie)(xie)(xie)振(zhen)、工(gong)頻(pin)(pin)諧(xie)(xie)(xie)(xie)振(zhen)、高頻(pin)(pin)諧(xie)(xie)(xie)(xie)振(zhen)。諧(xie)(xie)(xie)(xie)振(zhen)回(hui)(hui)路(lu)由帶鐵(tie)(tie)芯(xin)的(de)電(dian)(dian)(dian)(dian)感(gan)受元(yuan)(yuan)(yuan)件(jian)(jian)（如空載變壓(ya)器(qi)(qi)、電(dian)(dian)(dian)(dian)壓(ya)互(hu)(hu)感(gan)器(qi)(qi)）和系統(tong)中(zhong)的(de)電(dian)(dian)(dian)(dian)容元(yuan)(yuan)(yuan)件(jian)(jian)組成(cheng)。受鐵(tie)(tie)芯(xin)飽和的(de)影響，鐵(tie)(tie)芯(xin)電(dian)(dian)(dian)(dian)感(gan)元(yuan)(yuan)(yuan)件(jian)(jian)的(de)電(dian)(dian)(dian)(dian)感(gan)參數是(shi)非(fei)線(xian)(xian)性，這種(zhong)含有(you)(you)非(fei)線(xian)(xian)性元(yuan)(yuan)(yuan)件(jian)(jian)的(de)回(hui)(hui)路(lu)，在(zai)(zai)滿足一定諧(xie)(xie)(xie)(xie)振(zhen)條件(jian)(jian)時會(hui)(hui)(hui)產生(sheng)鐵(tie)(tie)磁(ci)(ci)(ci)諧(xie)(xie)(xie)(xie)振(zhen)。由于電(dian)(dian)(dian)(dian)壓(ya)互(hu)(hu)感(gan)器(qi)(qi)的(de)非(fei)線(xian)(xian)性電(dian)(dian)(dian)(dian)感(gan)與線(xian)(xian)路(lu)對地電(dian)(dian)(dian)(dian)容的(de)匹(pi)配而引起(qi)(qi)鐵(tie)(tie)磁(ci)(ci)(ci)諧(xie)(xie)(xie)(xie)振(zhen)過電(dian)(dian)(dian)(dian)壓(ya)，直接威脅電(dian)(dian)(dian)(dian)力系統(tong)的(de)安全運行，嚴(yan)重時會(hui)(hui)(hui)引起(qi)(qi)電(dian)(dian)(dian)(dian)壓(ya)互(hu)(hu)感(gan)器(qi)(qi)（PT）的(de)爆炸，造(zao)成(cheng)事(shi)故(gu)。傳統(tong)的(de)解決辦法是(shi)在(zai)(zai)電(dian)(dian)(dian)(dian)壓(ya)互(hu)(hu)感(gan)器(qi)(qi)開口三角(jiao)兩端并接一個電(dian)(dian)(dian)(dian)阻，從理論上講(jiang)對頻(pin)(pin)率越(yue)低的(de)鐵(tie)(tie)磁(ci)(ci)(ci)諧(xie)(xie)(xie)(xie)振(zhen)阻值(zhi)應取(qu)得越(yue)小(xiao)，但太(tai)小(xiao)的(de)電(dian)(dian)(dian)(dian)阻并在(zai)(zai)PT開口三角(jiao)上會(hui)(hui)(hui)影響其正(zheng)常運行，嚴(yan)重時會(hui)(hui)(hui)造(zao)成(cheng)PT燒毀。另外因為鐵(tie)(tie)磁(ci)(ci)(ci)諧(xie)(xie)(xie)(xie)振(zhen)的(de)頻(pin)(pin)率往往不(bu)是(shi)單一的(de)，所以這種(zhong)方法就難于消除(chu)所有(you)(you)頻(pin)(pin)率的(de)諧(xie)(xie)(xie)(xie)振(zhen)。

針(zhen)對以上情況(kuang)，我公(gong)司在總結了其它同(tong)(tong)行的不足之后(hou)自主(zhu)研發出(chu)DWX-Ⅲ微機型消諧裝(zhuang)(zhuang)置(zhi)，本裝(zhuang)(zhuang)置(zhi)采用(yong)在PT開(kai)口三角(jiao)處并接一雙向高性(xing)能開(kai)口三角(jiao)的電(dian)網(wang)零序(xu)電(dian)壓信(xin)號進行分(fen)析，向可控硅(gui)發出(chu)指令(ling)。當系統發生(sheng)鐵磁諧振(zhen)(zhen)時(shi)，PT開(kai)口三角(jiao)形出(chu)現伴有不同(tong)(tong)頻率(lv)成分(fen)的零序(xu)電(dian)壓，裝(zhuang)(zhuang)置(zhi)根據不同(tong)(tong)頻率(lv)，不同(tong)(tong)電(dian)壓值自動識(shi)別并區分(fen)鐵磁諧振(zhen)(zhen)與(yu)接地，是(shi)分(fen)頻諧振(zhen)(zhen)、基頻諧振(zhen)(zhen)還是(shi)高頻諧振(zhen)(zhen)，若(ruo)為接地，則由信(xin)號繼(ji)電(dian)器發出(chu)接地信(xin)號。僅當電(dian)網(wang)中發生(sheng)鐵磁諧振(zhen)(zhen)時(shi)，可控硅(gui)才會(hui)導通，三角(jiao)形繞組被短接，鐵磁諧振(zhen)(zhen)在強烈的阻尼作用(yong)下(xia)迅(xun)速消失，當諧振(zhen)(zhen)消失后(hou)，可控硅(gui)恢復到阻斷狀態。

該裝置適用于(yu)66KV及(ji)以下電(dian)壓等級的(de)中性(xing)點不接(jie)地、經(jing)消弧(hu)線圈接(jie)地、經(jing)電(dian)阻接(jie)地的(de)小電(dian)流接(jie)地系(xi)統，可廣(guang)泛用于(yu)電(dian)力(li)、石(shi)油(you)、化工、煤(mei)炭、冶金(jin)、建筑(zhu)等供(gong)電(dian)系(xi)統。