Voltage Graph of Grid Voltage Reduction in Ontario

[RoughRider]

I've thrown a couple of graphs onto a web page for you to view. On January
19th, a province wide voltage reduction test of 5% was conducted. The
graphs indicate only a 3% reduction from 242 to 235V.

http://www.qsl.net/va3pla/Voltage.html

Enjoy!

 

[_jj_]

Depending on your local distribution system,
you may not even have seen any voltage change at all...
.... you might have line regulators that counter-act
the system voltage reduction.
Regards

 

[RoughRider]

I should add that the observations were made in a small town that uses a
primary distribution voltage of 4.8kV. The town is fed directly from the
44kV grid typical of hundreds of other towns in the province.

 

[_jj_]

I should add that the observations were made in a small town that uses a
primary distribution voltage of 4.8kV. The town is fed directly from the
44kV grid typical of hundreds of other towns in the province.

There really is no "typical" in Ontario.
The individual 44 kV line could be regulated beyond the substation ;
certain 4800 v distribution lines may be regulated ...
etc
Regards

 

[Mr Wizzard]

There really is no "typical" in Ontario.
The individual 44 kV line could be regulated beyond the substation ;
certain 4800 v distribution lines may be regulated ...

So how does the power company regulate 44kV lines,
and 4800 v lines ? Outside of the generators themselves
at the turbines (which I believe output 6.9kV) how do
they regulate any of it I wonder ? (post generator).

 

[Pop]

:
:
: >I should add that the observations were made in a small town
that uses a
: >primary distribution voltage of 4.8kV. The town is fed
directly from the
: >44kV grid typical of hundreds of other towns in the province.
: >
:
:
: There really is no "typical" in Ontario.
: The individual 44 kV line could be regulated beyond the
substation ;
: certain 4800 v distribution lines may be regulated ...
: etc
: Regards

Do you have a point with your irrelevant "observations"?

 

[Mr Wizzard]

Some have pole top regulators. They look like long
75kVA cans with only high voltage lines in and out of
the top and no secondary terminals or wiring. There
will typically be a gauge looking dial on one side with
a 0 at the top and +25 at the 5 o'clock position
and -25 at the 7 o'clock position. These numbers and
description may vary from brand to brand.

Yer kidding!? Large pole-top "Variac's?" who-knew?
So someone's gotta climb the pole to crank the dial ?
Any idea how they work?

 

[SQLit]

Yer kidding!? Large pole-top "Variac's?" who-knew?
So someone's gotta climb the pole to crank the dial ?
Any idea how they work?

I was waiting for permission to enter Paramount Studios in Hollyweird, CA.
Across the street from the front gate is a residential neighborhood. There
were pole top power correction cap banks that switched in and out
automatically. Some times with a fair "snap" sound. The distribution was
something like 5kV, not sure of the exact voltage that LA DWP uses.

As for the automatic operation equipment, I do not know for sure. I can
think of several ways to do it.

I know the utilities use voltage correction equipment at every substation in
the USA. At least everyone I have worked in. Mostly the western US.

 

[Mr Wizzard]

I was waiting for permission to enter Paramount Studios in Hollyweird, CA.
Across the street from the front gate is a residential neighborhood. There
were pole top power correction cap banks that switched in and out
automatically. Some times with a fair "snap" sound. The distribution was
something like 5kV, not sure of the exact voltage that LA DWP uses.

PF (Power Factor) correction capacitors are different from regulators, no?

As for the automatic operation equipment, I do not know for sure. I can
think of several ways to do it.

Short of changing taps on a taped transformer, how would you do it ?

I know the utilities use voltage correction equipment at every substation in
the USA. At least everyone I have worked in. Mostly the western US.

But thats "Power Factor correction", thats not power "regulation" is it ?

 

[_jj_]

They are not microscopic ... I've seen 'em.