根據供電網絡允許電壓降校核電纜截面
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發布日期：2022-06-27 10:31:13
當電(dian)(dian)(dian)力網絡(luo)中(zhong)無調壓設備，而且電(dian)(dian)(dian)纜(lan)截面(mian)較小、線路較長時(shi)，為(wei)了保證供電(dian)(dian)(dian)質量，應按允(yun)許電(dian)(dian)(dian)壓降校核(he)電(dian)(dian)(dian)纜(lan)截面(mian)積。其(qi)校核(he)公式(shi)如下：根(gen)據我國實際(ji)情況，選擇電(dian)(dian)(dian)纜(lan)截面(mian)的大小時(shi)，應首(shou)先考(kao)(kao)慮長期(qi)允(yun)許載流量；其(qi)次進行熱穩(wen)定的校核(he)；*后考(kao)(kao)慮經濟(ji)電(dian)(dian)(dian)流密度和網絡(luo)允(yun)許電(dian)(dian)(dian)壓降。
理論(lun)上，無(wu)論(lun)根(gen)據哪種(zhong)方(fang)(fang)法選擇的電(dian)纜截面(mian)，都(dou)應(ying)該(gai)用其他方(fang)(fang)法去(qu)校核，亦即應(ying)根(gen)據各種(zhong)方(fang)(fang)法分別求出(chu)*小截面(mian)積，然后(hou)從(cong)中選擇*大值為*終選定值。
