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This is a tutorial on single phase power quality, it covers some theory, analogies and practical demonstrations on the following topics:
*
Power factor in linear loads -
Real power (
Watts), active power, true power, apparent power (VA - Volt
Amps), reactive power (VAR- Volt Amps Reactive), phase angle, inductive loads, capacitive loads, leading and lagging power factor.
* Power factor in non-linear loads - harmonics, total harmonic distortion (
THD), displacement power factor (
DPF), distortion power factor (dPF), true power factor, total power factor.
*
Power factor correction - passive, active, dynamic, harmonic filtering, synchronous condensers / capacitors, application of capacitors for power factor correction.
*
Power grid stability - Use of
VAR (reactive power) to stabilise grid voltage.
*
Negative and positive effects of large solar (PV) power generation on the grid.
* Do the power factor correction devices for your home save you money?
*
Quick demonstration of some tools to measure power quality:
Siglent
SHS 1102 Oscilloscope - http://www.tester.co.uk/siglent-shs1102-handheld-oscilliscope-bandwidth-60-mhz-2-channel-5-7-inch-display
HT
Instruments HT2209 - http://www.ht-instruments.com/en/products-ht/ac/dc_trms_current_clamp_meters/ht9022
Fluke 345 - http://en-us.fluke.com/products/power-quality-tools/fluke-345-clamp-meter
.html#overview
Fluke 43B - http://www.fluke.com/Fluke/caen/Power-Quality-Tools/Troubleshooting-Power-Meters/Fluke-43B
.htm?
PID=56080
Power factor calculator - http://www.rapidtables.com/calc/electric/power-factor-calculator.htm
Reactive
Power Control in Utility-Scale PV - http://solarprofessional.com/articles/design-installation/reactive-power-control-in-utility-scale-pv
Inverter Reactive
Power Compensation - http://www.blueoakenergy.com/blog/inverter-reactive-power-compensation/
Meet Solar’s
Imaginary Friend, Reactive Power - http://www.renewableenergyworld.com/rea/blog/post/2014/03/meet-solars-imaginary-friend-reactive-power
Power Factor Correction Scam Review - http://www.nlcpr.com/Deceptions1
.php
What are non-linear loads and why are they a concern today?
http://www.mirusinternational.com/downloads/hmt_faq01
.pdf
Power factor
Wiki - http://en.wikipedia.org/wiki/Power_factor
Synchronous
Condenser (sometimes called a synchronous capacitor or synchronous compensator) - http://en.wikipedia.org/wiki/Synchronous_condenser
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Music clip from Youtube
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Phase Three by Huma-Huma
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- published: 23 Feb 2015
- views: 9009