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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19 views

Meaning of impedances in IEEE Test Feeders

I'm having a dilemma about impedances for different line configurations in IEEE Test feeders. What do these impedances mean for arbitrary configuration like Configuration 601: Do they represent phase ...
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1answer
42 views

Return path for current flow in transmission lines?

We know that all current flow in loops, i.e. if they start at a source they must come back to the source. So for transmission lines, does the current that flow through our appliances in our homes go ...
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3answers
235 views

How does current flow to the ground in Delta connection (Ungrounded) in an Earth Fault?

I'm an electrical engineering student and I'm currently in In-Plant training in Electricity Company of my country. Recently I visited an electrical grid. I got to know about Earthing transformer. I ...
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41 views

AC resistance of LVAC transmission line

I'm currently working on a project to determine the transmission losses in an LVAC line, as part of an off-grid distributed generation system. The manufacturer of the cable has given me a DC ...
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4answers
3k views

Purpose of cylindrical attachments on Power Transmission towers

Attached below is an image of a Power transmission pole. What I am interested in is the cylindrical shaped objects attached to the transmission tower. Some other observations and relevant information:...
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2answers
175 views

Surge arrester placement in substation

Is it enough to place surge arrester on the terminals of the transformer in a substation, or every power line entering the substation should have its own?
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1answer
901 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
340 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
162 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, ...
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1answer
80 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 ...
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1answer
57 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 ...
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2answers
69 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, ...
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1answer
55 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
1k 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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1answer
240 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
281 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, ...
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1answer
89 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 ...
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1answer
52 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
624 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 ...
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3answers
496 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 ...