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1.工作原理

    為(wei)(wei)了防止(zhi)電(dian)(dian)(dian)(dian)(dian)磁式電(dian)(dian)(dian)(dian)(dian)壓互感(gan)器(qi)鐵磁諧(xie)振(zhen)的(de)(de)(de)(de)發(fa)生(sheng)(sheng)，在 PT中(zhong)(zhong)性(xing)點(dian)串入阻(zu)尼電(dian)(dian)(dian)(dian)(dian)阻(zu)，可以達到消(xiao)(xiao)(xiao)除諧(xie)振(zhen)的(de)(de)(de)(de)目的(de)(de)(de)(de)。理(li)想的(de)(de)(de)(de)阻(zu)尼電(dian)(dian)(dian)(dian)(dian)阻(zu)，在正常運行(xing)狀(zhuang)態(tai)下(xia)(xia)為(wei)(wei) 0，不(bu)(bu)改變 PT 的(de)(de)(de)(de)零(ling)序回路，因此不(bu)(bu)會(hui)(hui)影(ying)響互感(gan)器(qi)的(de)(de)(de)(de)測量精(jing)度，也不(bu)(bu)會(hui)(hui)放大中(zhong)(zhong)性(xing)點(dian)不(bu)(bu)平衡電(dian)(dian)(dian)(dian)(dian)壓；在諧(xie)振(zhen)發(fa)生(sheng)(sheng)時(shi)，電(dian)(dian)(dian)(dian)(dian)阻(zu)趨于∞，相(xiang)當于互感(gan)器(qi)不(bu)(bu)接地，也就破壞(huai)了零(ling)序諧(xie)振(zhen)回路。將一次消(xiao)(xiao)(xiao)諧(xie)器(qi)串聯安(an)裝在 PT 中(zhong)(zhong)性(xing)點(dian)與(yu)地之間，正常運行(xing)狀(zhuang)態(tai)下(xia)(xia)電(dian)(dian)(dian)(dian)(dian)阻(zu)為(wei)(wei)千歐左(zuo)右，而 PT 一次繞組的(de)(de)(de)(de)阻(zu)抗為(wei)(wei)兆(zhao)歐級，因此不(bu)(bu)會(hui)(hui)對(dui) PT 的(de)(de)(de)(de)各項性(xing)能產生(sheng)(sheng)影(ying)響，同時(shi)也不(bu)(bu)會(hui)(hui)明顯改變系統的(de)(de)(de)(de)各項參數。當 PT 發(fa)生(sheng)(sheng)諧(xie)振(zhen)時(shi)鐵芯飽和，一次繞組激磁電(dian)(dian)(dian)(dian)(dian)流增加，一次消(xiao)(xiao)(xiao)諧(xie)器(qi)電(dian)(dian)(dian)(dian)(dian)阻(zu)快速增長，能夠較好的(de)(de)(de)(de)發(fa)揮出阻(zu)尼作(zuo)用。而且諧(xie)振(zhen)能量越大，一次消(xiao)(xiao)(xiao)諧(xie)器(qi)的(de)(de)(de)(de)消(xiao)(xiao)(xiao)諧(xie)時(shi)間越短，對(dui)設(she)備的(de)(de)(de)(de)絕緣更(geng)為(wei)(wei)有利(li)。

2.型號命名及參數

    一次消諧器型號命名如下：