Substation Zone Of Influence 4

[3winding]

I am looking for assistance in calculating the 300V Zone of Influence with respect to communications equipment protection at a substation. Does anyone have any references on this?

 

[dpc]

You might do a search on "ground potential rise". Also try

http://www.positronpower.com.

 

[busbar]

One reference is IEEE standard 367 Recommended Practice for Determining the Electric Power Station Ground Potential Rise and Induced Voltage From a Power Fault

TOC at

http://standards.ieee.org/reading/ieee/std_public/description/psystcomm/367-1996_desc.html

 

[3winding]

Thanks Busbar - this standard looks like it covers it.

 

[busbar]

pintalo—

Unfortunately, IEEE does not provide much of anything for free these days, but PDF availability does simplify things a bit.

 

[jbartos]

Suggestion: Visit

http://standards.ieee.org/reading/ieee/std_public/description/psystcomm/487-2000_desc.html

for: IEEE Std 487-2000 IEEE Std 487-2000 IEEE Recommended Practice for the Protection of Wire-Line Communication Facilities Serving Electric Supply Locations - Description

 

[jbartos]

Suggestion: This may come handy:

http://gpr-expert.com/wire-line.htm

since it addresses in:
Figure 2: Block diagram for HVI installation,
the 300 Volts Point Zone of Influence

 

[cuky2000]

Using a combination of twisted pairs wires, shielding and grounding connection could be an effective mitigation for the effect of induced voltage on control and low voltage power cable.
Significant induce voltage could be created on control and low voltage power cable by surge during switching, lightning or fault conditions in a substation.
Fiber optic could be an option for control system since is naturally immune to induce voltage.
The enclose article could be helpful for your application.

http://pm.geindustrial.com/faq/Documents/General/GER-3205.pdf

 

[buzzp]

Current signals would be more immune to this sort of thing than a 0-5V signal.

 

[jghrist]

Getting back to the original question about calculating the 300 volt zone of influence:

I don't have access to IEEE Std 487 or 367, but wouldn't a calculation of equipotential lines around a facility during a fault give you the 300 volt zone of influence. Several grounding packages (for instance SES CDEGS) allow modelling of the ground system and calculation of earth potential at various points.