變(bian)電(dian)(dian)站，改(gai)變(bian)電(dian)(dian)壓的(de)場所。為了把發(fa)(fa)電(dian)(dian)廠(chang)發(fa)(fa)出來的(de)電(dian)(dian)能輸送到較遠的(de)地方，必須(xu)把電(dian)(dian)壓升高，變(bian)為高壓電(dian)(dian)，到用戶(hu)附近(jin)再按需要(yao)把電(dian)(dian)壓降低，這種升降電(dian)(dian)壓的(de)工作靠變(bian)電(dian)(dian)站來完成。變(bian)電(dian)(dian)站的(de)主要(yao)設備是(shi)開(kai)關和(he)變(bian)壓器(qi)。