1) equivalent impedance of buses
母线综合阻抗
2) bus bar impedance
母线阻抗
3) integrated impedance
综合阻抗
1.
Based on the ratio between the fault component voltage phasor of the busbar and the sum of all branch current phasor of the busbar,which is defined as the fault component integrated impedance,a novel busbar protection principle is proposed.
提出了基于故障分量综合阻抗的母线保护新原理。
2.
Based on the ratio between the sum of voltage phasors and the sum of current phasors at two terminals of the transmission line, which is defined as the integrated impedance, a new transmission line pilot protection principle is proposed.
提出了一种基于综合阻抗的纵联线路保护新原理。
3.
Based on the ratio between the sum of two terminals fault component voltage phasor of the transmission line and the sum of two terminals current phasor of the same line,which is defined as fault component integrated impedance,a new transmission line pilot protection principle is proposed.
提出了一种基于故障分量综合阻抗的纵联线路保护新原理。
4) Impedance synthesis
阻抗综合
1.
Vector fitting(VF) is used to approximate the rational functions and impedance synthesis theory is applied to provide equivalent circuits suitable to EMTP and PSCAD.
本文对HVDC阀体内的晶闸管、阻容吸收电路和饱和电抗器的阻抗频率特性进行了测量(频率范围:100kHz～50MHz),在此基础上,通过矢量匹配方法对测量所得的离散点进行有理函数逼近,基于阻抗综合理论建立了阀体主要器件的高频等效电路。
5) bus equivalent impedance
母线总阻抗
6) Compound resistance method
阻抗综合法
补充资料：星接阻抗和三角接阻抗的变换
星接阻抗和三角接阻抗的变换
transformation between starc-onnected and delta-connected impedances
x ing]一e乙日kongl介e sonJ一00}Iez日伙ongde匕一。一〕huon星接阻抗和三角接阻抗的变换(t ransfor-mation betweenstar一eonneeted and delta-eonneeted imPedanees)接成星形的三个阻抗和接成三角形的三个阻抗互相替代的等效变换。它们之间的关系可用一组变换公式表示。按这组公式，用星接阻抗替换三角接阻抗或者反过来，不会影响稳态下电路其他部分的正弦电压和电流，常用于对称三相电路的分析和计算。 图1为三个阻抗21、Z:、23接成星形(又称丫形)。图2为三个阻抗Z小22。、Zal接成三角形(又称△形)。它们之间的变换公式如下:人23土图1星接阻抗图2三角接阻抗(1)将星形连接变换成三角形连接212一Z:+22+2 122及3一22+za十警(1)、|冬|矛231一23+21+2321(2)将三角形连接变换成星形连接z、-二一典乒兴-) 艺‘2士乙“3十乙31…_2 oqZI，}Z。一下万~一二-二二-汁 乙‘2士乙23十乙3‘1_Z。IZoq}艺q一二二一~二，二二--，-二二-~J 乙12十乙23十艺32夕(2) 当三个星接阻抗相等，即21一Z:一23一z丫、三个三角接阻抗相等即212一223一231一Z△时，变换公式是 Z二一32丫，Z丫一Z△/3
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条