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Home > Archive > Electrical Engineering > January 2008 > Electricity Board Charging
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Electricity Board Charging
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| Why we are charged for Watt power only. We are being not charged for
VAR power. Inductance and capacitance is also load and they also
consume power. Then why we are not charged for it.
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| On Mon, 14 Jan 2008 06:37:33 -0800 (PST), rtk <rtarunkumar@gmail.com>
wrote:
>Why we are charged for Watt power only. We are being not charged for
>VAR power. Inductance and capacitance is also load and they also
>consume power. Then why we are not charged for it.
VAR power is stored briefly and then returned. Except for losses, it
is not consumed.
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| Chuck wrote:
> On Mon, 14 Jan 2008 06:37:33 -0800 (PST), rtk <rtarunkumar@gmail.com>
> wrote:
>
>
> VAR power is stored briefly and then returned. Except for losses, it
> is not consumed.
>
Nicely stated.
Wires, generators and transformers have be larger for lower power
factor. It is common for some users, particularly industrial, to pay a
penalty for their VAR 'use', metered separately from Watts. That
produces an incentive to lower the VAR use by doing power factor correction.
Also common to charge for the peak power ("demand") used since high
peaks also require larger wires, generators, transformers. This provides
an incentive for industries to level out their energy use eliminating peaks.
--
bud--
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| Paul Hovnanian P.E. 2008-01-14, 5:25 pm |
| bud-- wrote:
>
> Chuck wrote:
>
> Nicely stated.
>
> Wires, generators and transformers have be larger for lower power
> factor. It is common for some users, particularly industrial, to pay a
> penalty for their VAR 'use', metered separately from Watts. That
> produces an incentive to lower the VAR use by doing power factor correction.
>
> Also common to charge for the peak power ("demand") used since high
> peaks also require larger wires, generators, transformers. This provides
> an incentive for industries to level out their energy use eliminating peaks.
Right. I'd like to see a peak VA charge. This would encourage load
leveling and power factor correction. But metering technology being what
it is, it won't pay to upgrade it except for major consumers.
--
Paul Hovnanian paul@hovnanian.com
-----------------------------------------------------------------------
Procrastinators: The leaders for tomorrow.
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| Paul Hovnanian P.E. wrote:
> bud-- wrote:
>
> Right. I'd like to see a peak VA charge. This would encourage load
> leveling and power factor correction. But metering technology being what
> it is, it won't pay to upgrade it except for major consumers.
>
With electronic meters couldn't they add all kinds of features to a
single meter? Watts, VAR, demand, harmonic penalty and time of day rates
in a single meter on your house? All reported by a radio link. My kid's
meter was just changed from mechanical to digital/electronic (both with
radio link).
Would seem like the common Watts, VAR and demand could at least be
combined in a single meter for new installations.
--
bud--
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| On Tue, 15 Jan 2008 10:14:34 -0600, bud-- <remove.budnews@isp.com>
wrote:
>Paul Hovnanian P.E. wrote:
>With electronic meters couldn't they add all kinds of features to a
>single meter? Watts, VAR, demand, harmonic penalty and time of day rates
>in a single meter on your house? All reported by a radio link. My kid's
>meter was just changed from mechanical to digital/electronic (both with
>radio link).
>
>Would seem like the common Watts, VAR and demand could at least be
>combined in a single meter for new installations.
As Paul pointed out, the problem is not technological but economic.
The benefits of all these measurements for residential customers would
not cover the costs of upgrading the instrumentation.
Besides, utilities don't need to know each consumer's load
characteristics. They can set rates based on the entire consumer
class.
Chuck
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