

RSVG系列低壓靜止(zhi)無(wu)功(gong)(gong)(gong)發(fa)生(sheng)器是利用可關斷大功(gong)(gong)(gong)率電(dian)力電(dian)子器件(jian)(IGBT)組成自換相橋式電(dian)路,經過電(dian)抗器并(bing)聯在(zai)電(dian)網上(shang),通過調節橋式電(dian)路交(jiao)流(liu)側輸(shu)出電(dian)壓的(de)(de)幅(fu)值和相位(wei),迅速的(de)(de)發(fa)出或(huo)者吸收所(suo)需要的(de)(de)無(wu)功(gong)(gong)(gong)功(gong)(gong)(gong)率,從(cong)而實現動態調節無(wu)功(gong)(gong)(gong)的(de)(de)目的(de)(de),不僅可以(yi)跟蹤補償系統(tong)無(wu)功(gong)(gong)(gong)電(dian)流(liu),還可以(yi)對14次以(yi)下諧(xie)波電(dian)流(liu)進行跟蹤補償。
主要功能
1.提高線路輸(shu)出穩定(ding)性;
2.維(wei)持受電端電壓(ya),加(jia)強系(xi)統電壓(ya)穩定(ding)性;
3.補償系統無功功率,提高功率因數,補償電網三相(xiang)不平衡(heng);
4.抑制(zhi)電壓波(bo)動和(he)閃變;
5.在傳統(tong)SVG的功能(neng)基礎上(shang),增加了(le)治理14次以下特征諧(xie)波(bo)的功能(neng),其治理能(neng)力為RSVG額定(ding)電流50%左右(you)
鐵路機車是單相(xiang)負荷,通常(chang)采用VV變接入三(san)相(xiang)電(dian)(dian)(dian)網,機車運(yun)行(xing)時(shi)會產(chan)生很大的負序電(dian)(dian)(dian)流注入電(dian)(dian)(dian)網,而且機車牽引(yin)變流器采用相(xiang)控整(zheng)流技(ji)術,會產(chan)生嚴重的奇次諧波。
隨著電(dian)(dian)氣(qi)化(hua)鐵(tie)路的(de)迅速發展,其對電(dian)(dian)力供、用電(dian)(dian)系統側(ce)的(de)影響(xiang)也日益突出(chu)。因鐵(tie)路為27.5kV單(dan)相負載(zai),如果不(bu)(bu)進(jin)行平衡(heng)化(hua)補償(chang),將會造成公共并網點電(dian)(dian)壓嚴重(zhong)不(bu)(bu)平衡(heng),進(jin)而對并網點的(de)其它負載(zai)產生(sheng)嚴重(zhong)影響(xiang)。
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