Modern Loads & Poor Power Quality Harmonics Issues 29/30 Nov - - PowerPoint PPT Presentation

Modern Loads & Poor Power Quality Harmonics Issues

29/30 Nov’ 2017 Distribution Utility Meet (DUM 2017) Bangalore

India’s Grid PQ – Nearing Cliff?

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Region-wise Power Quality Parameters observed across the country

(Source: Swachh Power by Power Grid Corporation of India Ltd. | Year 2014)

The Hidden Menace within

Source: Efficienergi survey

Voltage Variation Rapid Voltages Sags / Swells Transient V - Unbalanc e High Vthd I - Unbalanc e High Ithd # of Locations Surveyed 969 969 969 969 969 892 969 892 Health Score # Location Wise 10% 27% 6% 15% 1% 14% 25% 41% 0% 25% 50% 200 400 600 800 1000 # Locations Surveyed

Survey on Power Quality in Industries/IT

Volta ge Varia tion Rapi d Volta ges Sags / Swell s Trans ient V - Unba lance High Vthd I - Unba lance High Ithd # of Facilities Studied 66 66 66 66 66 70 66 70 Health Score # Facility Wise 44% 67% 14% 48% 8% 12% 55% 87% 0% 25% 50% 75% 100% 64 65 66 67 68 69 70 71 # Industries

Survey on Power Quality in Industries/IT

Clear Winner!!!

Expect Further PQ Deterioration

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2017 2018 2019 2020 By 2019, 770 million LED bulbs and 35 million LED streetlights to be deployed Massive growth EV and charging infrastructure Solar Installed base expected to go up by 10x; Wind by 2-3x in 2020 Over Half-Million AC Drives will be added in the industry, annually

Harmonics to increase by ~ 50-60% by 2020, from the current levels with adverse effect on other PQ indices too.

Cities with Metros to double (7 to 14) by 2020, 19 More Cities in Plan Digital india Push & White Good Penetration

Powering Tomorrow's India

Efficiency Without Quality?

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High Low LEDs High Bubble size indicates relative LOAD estimate Impact on Power Quality ----- > Impact on Energy Efficiency ----- > Factory Automation Legacy VFD IT Equipment Overloading of Existing Infra (Xfmr/cable) Arc Furnaces Telecom Infrastructure Old Motors New Gen UPS/VFD Legacy UPS Inverters Low

Poor Power Quality From Harmonics

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Figure A These sinusoidal wave shapes contain many high frequency components called “Harmonics” Figure B Presence of harmonics increases RMS and peak current of the waveform. This increases over heating, relay malfunctioning and damage to insulation Figure C Harmonic currents flowing through the impedance of a distribution network produce harmonic voltage drop, resulting in distorted voltage waveform.

Overheating Interference Resonance Insulation Failures Capacitor Failures

Machine Vibration Frequent Fuse Blowing Burning Out Small Auxiliary Equipment Supply Distribution System Distortion Malfunctioning

• f Electronic

Equipment Severe Lamp & Computer Screen Flicker

How It Impacts You and Industry?

• Positive, negative and zero sequence harmonics can cause different effects, as

noted in the table. Harmonic voltages and current can also cause the following problems

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Telephone Interference PLC & Computer Failures Misoperation

• f SCR

Drives Frequent Tripping of Circuit Breakers

The PQ Challenge

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• ABSENCE of unified standards and

regulations akin to PF Improvement

• UTILITIES can ill-afford to ignore diverse

impacts of PQ in such a dynamic scenario

• STRIKING lack of investments in attempts

to measure, assess, learn, analyse and improve electrical power quality issues among stakeholders

Comparison of LS Graph

Without Interruption With Interruption

Comparison of LS Graph

Without Interruption With Interruption

Harmonic Trend in Domestic Complex

• The load survey graph taken in a distribution

transformer with exclusive domestic loads.

• The first and second slide shows the

difference between load curve on different

• days. Left curve is the day without load

shedding and load curve is balanced. The right hand side load curve with load sheddings shows increase load after resumption of power supply.

Vision

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To propagate a common Platform to monitor, measure and ensure harmonics & power quality compliance assurance

Industry’s first! Benefits all Stakeholders Technology Neutral

The Platform

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UNIFIED software tool to improve compliance assurance of power quality parameters

Free (Version 1) Restricted Access (Version 2) Restricted Access (Version 3)

Inviting Evangelists & Associates

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Drive user empanelment, especially SMEs Lead/Support Partner for stakeholder consortium Resources to propagate platform (People,

Infrastructure etc.)

Knowledge to structure and scale up Platform Financial Grant for Platform

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www.apqi.org

Thank You

Email: Thirumoorthy A D <adtmoorthy@gmail.com> Contact : manas.kundu@copperalliance.asia For any query related to tool connect with Rajen Mehta <rajen@efficienergi.com>