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q 用于計(jì)算異步電動(dòng)機(jī)開斷電流的系數(shù)
qn標(biāo)稱截面
R和r電阻有名值和相對(duì)值
RG計(jì)算電流I〃K和iP時(shí)的同步電機(jī)的假想電阻
S〃K對(duì)稱短路功率初始值(視在功率)
Sr電氣設(shè)備的額定視在功率
tf假想變比
tmin最小延時(shí)
tr額定變比(分接位開關(guān)于主分接時(shí))
Un系統(tǒng)標(biāo)稱電壓,線電壓(有效值)
Ur設(shè)備的額定電壓,線電壓(有效值)
ukr阻抗電壓,%
uRr電阻電壓,%
 正序、負(fù)序和零序電壓
X和x 電抗有名值和相對(duì)值
Xd和Xq直軸同步電抗和交軸同步電抗
Xdq考慮勵(lì)磁影響后，在復(fù)勵(lì)發(fā)電機(jī)端穩(wěn)態(tài)短路時(shí)的發(fā)電機(jī)計(jì)算電抗
X〃d和X〃q直軸超瞬態(tài)電抗和交軸超瞬態(tài)電抗(二者均為飽和值)
tdsat短路比的倒數(shù)
 正序短路阻抗
 負(fù)序短路阻抗
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