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Questions tagged [distribution-network]

Power networks of medium voltage (2kV to 35kV typically) that connect the higher voltage transmission system to most of the electricity consumers. This tag covers anything related to electric power distribution system operation, protection, maintenance and capacity upgrade.

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1answer
143 views

Why ship power distribution systems have no neutral?

What is the reason for this difference between the distribution systems of power companies and the systems implemented at ships?
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3answers
88 views

Convert kW generated per minute to kWh

I have the data of power generated by a solar panel per minute in kW. I need to calculate the total number of kWh generated per day. How do I do this? So far, I divided each value of kW by 60 and ...
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1answer
60 views

Precise definition of a “radial” electrical distribution system topology

I'm confused about what is meant by "radial" topology of an electrical distribution system. This site claims we can generally group electrical distribution systems into three classes: radial, loop, ...
4
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1answer
71 views

How do you close a switch on a high-voltage network?

This is something I've been curious about for a long time. Let's say you're a utility trying to connect two segments of a distribution grid. Both segments will have about the same frequency, because ...
0
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1answer
37 views

How to estimate/compute for disconnected neutral potential rise?

This is a different question, I want to know what could be the minimum distances between poles before the ungrounded neutral in one pole can create different potential from the other neutrals in other ...
2
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2answers
60 views

Regarding Power Market demand and supply

As I have read, that power supply should be equal to demand. As it can't be stored .So basically this means power is generated in real time. Consider an area where power comes from a Substation A, ...
2
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1answer
51 views

Edge betweenness centralities for distribution grids [closed]

Graph centralities like edge betweenness centralities are commonly used to study the vulnerability in transmission networks, can they equally be used to study radial distribution networks ?
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6answers
733 views

Why am I getting shocked from “hot” line and touching “ground” (Earth)

So I live in an EU country and don't have Earth grounding for my house. Still I am getting shocked when touching "hot" line (220VAC) and standing on "ground" (Earth). How is this possible? From my ...
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0answers
21 views

Topological observibility in OPP problem

I have a short question about observability analyzing constraint in optimal PMU placement problem in power system. Observability analyzing has two method: numerical and topological. Most of papers use ...
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1answer
159 views

zig zag vs open delta

Can we use zig-zag connection of transformers instead of open delta in electrical distribution ? If yes, then which one is the more preferable compared to other and why ?
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3answers
183 views

Australian suburban power distribution

In Melbourne, Australia I see a lot of utility poles like the one in the picture below. There are power lines on two levels. Three lines on the top level and four lines in the lower level. I assume, ...
0
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1answer
75 views

Symmetrical three-phase power flow problem, √3

I have done quite a lot of research regarding the power flow problem for the steady state operation of an electric system. In many papers about the power flow problem the power flow equation are ...
0
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1answer
206 views

The critical clearing time (CCT) of a fault in DIgSILENT

How can I determine the critical clearing time (CCT) of a fault in DIgSILENT? How can I use DPL to determine the critical clearing time (CCT) of a fault in DIgSILENT?
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1answer
41 views

Approaching to Integral from Limit of Sum ->Finding voltage drop due to uniformly distributed load current on a distributor

As shown in the picture above, I want to calculate the voltage drop due to a distributed load. l is the length of the distributor; n is simply no of segments, n=l/Δx; I have written down the sum to ...
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1answer
482 views

Service Wire Burn

I have a Distribution Transformer rated 25kVA 14.4/240 kV installed in the system. One phase of the serving 3 phase line of our electric utility in 23kV primary side are faulted in Line to ground ...
2
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3answers
440 views

Isolation provided by transformers

I have a few questions about transformers and isolation. I will describe my understanding (maybe wrong) and questions about them. Transformers provide safe isolation by disconnecting two circuits ...