The incredible Power Losses caused by Harmonics not measurable but evident with theoretical calculations.
The misconception that High Power factor is high efficiency is blown away by the Power Loss on cables and transformer. Drives and 3rd Harmonics (due to imbalance and 3rd harmonics) can cause huge I2R losses.
We investigated the 100 KW drive losses in a Japanese motor cycle factory, and the 3rd harmonic losses due to imbalance and 3rd harmonics of single phase loads. We simulated these conditions with simulation software, and the result shows incredible unimaginable power losses, if harmonics of 100% in drives and 3rd Harmonic current in office building can cause huge losses.
Installation of Advanced Universal Passive filters, and Neutral Compensator, closer to loads will not only Mitigate Harmonics to IEEE-519 but also save substantially on Power and reducing carbon foot print.The other benefits include reduction of heat in transformer and cables, MCB tripping and protecting and extending the life cycle of the drive itself.
The Practice of reducing Harmonics following good electrical practices and employing the appropriate Innovative Passive Harmonic filters can result in huge savings in Power as well reduction of capital expenses and operational expenses. Thus the plant being efficient and productive making the operation competitive.
The practice of Installing appropriate Harmonic filter closer to loads has multiple advantages;
# Power factor is improved >0.98
#KVA is reduced. Frees up for extra Loading. Reduction in KVA Charges
#Power quality is improved complying with IEEE-519. Voltage distortion and current distortion reduced substantially
# As power Quality is improved it improves the performance and life cycle of the Load.
# Substantial reduction if I2R losses and reduction in heat in cables and transformers.
#In this case the return on Investment (ROI) is as low as 7 months. Excellent by any standards. Proves that Investment in Power quality is worth the investment.
# Return on Investment calculation does not include other tangible benefits like performance of Drives, longevity of drives, failures of MCB and cable replacement cost and trouble free operation.
We are reproducing the data collected and the simulation results with Power loss and ROI calculation.
DATA COLLECTED
SOLUTIONS:
COMPRESSOR-1:
BEFORE INSTALLATION OF ADVANCED UNIVERSAL PASSIVE HARMONIC FILTER:
AFTER INSTALLATION OF ADVANCED UNIVERSAL PASSIVE HARMONIC FILTER:
PERFORMANCE OF ADVANCED UNIVERSAL PASSIVE HARMONIC FILTER AFTER INSTALLATION IN COMPRESSOR-1:
VTHD - 0.1 %
ITHD - 5.5%
POWER FACTOR - 0.99
KVA - 62.5
MLDB:
BEFORE NEUTRAL COMPENSATOR INSTALLED:
VOLTAGE & CURRENT WAVEFORM:
AFTER NEUTRAL COMPENSATOR INSTALLED:
VOLTAGE & CURRENT WAVEFORM AFTER NEUTRAL COMPENSATOR INSTALLED:
POWER LOSS CALCULATION:
LOSSES IN TRANSFORMER DUE TO HARMONICS:
REFER:
https://electrical-engineering-portal.com/transformer-extra-losses-due-to-harmonics
CABLE LOSS DUE TO HARMONICS:
TOTAL KW SAVINGS AFTER INSTALLATION OF FILTER :
TRANSFORMER KW LOSS + CABLE KW LOSS
3.7 KW + 0.74 KW
4.4 KW
TOTAL KVA SAVINGS:
BEFORE INSTALLATION OF FILTER:
AFTER INSTALLATION OF FILTER:
.BEFORE INSTALLATION OF FILTER - AFTER INSTALLATION OF FILTER
88.6 KVA - 68.5
20 KVA
TOTAL SAVINGS IN RUPEES:
KW SAVINGS = 4.4 KW * 24 HRS * 30 DAYS * 12 MONTHS * RS.7
= 2,66,112 / YEAR
KVA SAVINGS = 20 KVA * 12 MONTHS * RS.400
= 96,000 / YEAR
KW SAVINGS + KVA SAVINGS
2,66,112 + 96,000
3,62,112 / YEAR
RETURN ON INVESTMENT
FILTER COST / SAVINGS PER YEAR
2,10,000 / 3,62,112
7 Month
Team Supervisor at PT PLN (Persero)
1 年I know that it is an old thread in Linkedin, but, in where I work (utility company), we didnt look out for this subject at all. It is fascinating to know how harmonics bring losses to the grid, I'll surely deep dive this subject. Thank you John for the insight!
CEO @ WAVEFORMS | Power Quality Filters & APFC Products Expert
4 年The losses are more when harmonics are more. Most drives have DC choke hence the harmonics will be lesser . However this particular drive was rich in harmonics more than 100% hence loss due to distortion of current waveform will be more die to skin effect in cables, heat losses due to I2R Losses, iron losses and copper losses. These losses are not quantifiable however theoretical calculation establish these losses.?
Experienced Electrical Engineer, looking for new challenges.
4 年Have you been able to verify these calculations through real-life measurements? Passive harmonic filters, and the likes, will in themselves be added loads, that will have to be supplied, with no increase in output from the device they are filtering for. In addition to direct capital cost, what are the increment in maintenance cost, cost of the "real estate" occupied, etcetera?
Global Business Manager -Comsys AB Sweden- Power quality solutions, DC power solutions
4 年Depends on the network it varies. Probably taken in to account downtime, failures , replacement costs, improved productivity etc...