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Join Date: Apr 2017
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How to Calculate Positive and Zero-Sequence Resistance and Reactance?

04/01/2017 4:42 PM

Hello there!
Given cable thickness, is it possible to calculate the positive- and zero-sequence resistance and reactance of the cables required to perform power flow analysis?
The utility company has provided me with .DWF file with GIS and cable characteristics.
The following parameters are taken from .dwf file
LVAerialLine,ByPassFeederNo: no
LVAerialLine,CSABlue: no
LVAerialLine,CSANeutral: 70Cu Bare
LVAerialLine,CSARed: no
LVAerialLine,CSASL: 35Cu PVC
LVAerialLine,CSAYellow: 70Cu PVC
LVAerialLine,FeatId: 41595
LVAerialLine,FeederNo: 2

Your help is greatly appreciated.

Thank you!

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#1

Re: How to calculate positive- and zero-sequence resistance and reactance?

04/01/2017 4:52 PM

yes

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#2

Re: How to calculate positive- and zero-sequence resistance and reactance?

04/01/2017 4:57 PM

No, you also need to know the configuration and spacing of the individual conductors.

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#6
In reply to #2

Re: How to calculate positive- and zero-sequence resistance and reactance?

04/08/2017 11:42 AM

Once the spacing is available, how do i proceed?

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#3

Re: How to Calculate Positive and Zero-Sequence Resistance and Reactance?

04/02/2017 12:10 AM
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#4

Re: How to Calculate Positive and Zero-Sequence Resistance and Reactance?

04/05/2017 5:09 AM
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#5

Re: How to Calculate Positive and Zero-Sequence Resistance and Reactance?

04/05/2017 5:14 AM

Also:

https://www.academia.edu/6746956/Book_electric_power_distribution_handbook_alimuddin_jte

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#7

Re: How to Calculate Positive and Zero-Sequence Resistance and Reactance?

04/10/2017 12:52 PM

In my opinion it is about LT AERIAL BUNCHED CABLE of 1 live 1 neutral 1 street lighting. Usually the rated voltage is 1.1 kV and the insulation is about 1.5-2 mm thick.

Approximate, according to BS7671 Table 4D2B 70oC 70mm^2 copper 2 conductors 50 Hz r=0.63 ohm/km [two wires go and forth] x=0.160 ohm/km.

If the messenger is grounded[earthed] then the Xo reactance could be the same.

The Ro depends on messenger resistance. For ACSR 7/1 it could be 0.5 ohm/km

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