GIS母线波阻抗如何计算
最近学习下变电所雷电过电压计算方面的论文,基本上都是采用波阻抗及波速来描述GIS母线的管线特性,ATP-MTP自带算例EXA—9也是这么做的。采用linezt—3模型,需计算母线的零序、正序波阻抗及波速,但不知道参数怎么计算,望高手进指点下。 好像有相关的论文吧 我记得在哪见过~~~~不好意思,忘记了,难道是某个GB上? 不知是多少kv的GIS110KV100Ω 250m/us
220kV 70Ω 250m/us 110kV的电缆 18Ω 150m/us 波阻抗应该有正序、零序的说法吧,linezt—3模型里需填写A+、A0,B+、B0的,line=1 时A=Modal surge impedance in Z=sqrt(L'/C')A+= Pos. sequence. A0= Zero sequence.
B=propagation velocity in v=1/sqrt(C'*L') B+= Pos. sequence B0= Zero sequence. 多谢楼上的资料
Name : LINEZT_3 - Distributed parameters (Clarke) 3 phase. Transposed
Card : BRANCH
Data:Values are entered in the two independent modes of the system, here called + and 0.
R/l= Resistance pr. length in
The lossless part can be described in three ways
0. Inductance L' in if Xopt=0 or in if Xopt=power frequency
Capacitance C' in if Copt=0 or in if Copt=power frequency
1. Modal surge impedance in ; Z=sqrt(L'/C')
Modal propagation velocity in ; v=1/sqrt(L'*C')
2. Modal surge impedance in
Modal propagation time in ; T=sqrt(L'*C')*length
Xopt. and Copt. are set in menu: ATP|Settings/Simulation.
The user can choose conductance modeling G=0 (the usual case) and G=R*C/L (distortionless)
length= length of line in
Node : IN1= Start node. Letter 'A', 'B' or 'C'
is added to nodename for node 1, 2 and 3.
OUT1= End node. Letter 'A', 'B' or 'C'
is added to nodename for node 1, 2 and 3.
Only branch voltage output is reliable.
RuleBook: IV.D.1 我的linezt-3没有+ - 0 是电网绝缘配合及其模拟的计算导则吗?
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