Modern Loads & Poor Power Quality Harmonics Issues 29/30 Nov’ 2017 Distribution Utility Meet (DUM 2017) Bangalore
India’s Grid PQ – Nearing Cliff? Region-wise Power Quality Parameters observed across the country (Source: Swachh Power by Power Grid Corporation of India Ltd. | Year 2014) 2
The Hidden Menace within Survey on Power Quality in Industries/IT 71 100% Clear Winner!!! 70 # Industries 75% 69 68 50% 67 66 25% 65 64 0% Sags Volta Rapi V - I - / High High ge d Trans Unba Unba Swell Vthd Ithd Varia Volta ient lance lance s Source: Efficienergi survey tion ges # of Facilities Studied 66 66 66 66 66 70 66 70 Health Score # Facility Wise 44% 67% 14% 48% 8% 12% 55% 87% Survey on Power Quality in Industries/IT # Locations Surveyed 50% 1000 800 25% 600 400 200 0% V - I - Voltage Rapid Sags / Transient Unbalanc High Vthd Unbalanc High Ithd Variation Voltages Swells e e # of Locations Surveyed 969 969 969 969 969 892 969 892 Health Score # Location Wise 10% 27% 6% 15% 1% 14% 25% 41%
Expect Further PQ Deterioration Digital india Push By 2019, 770 Massive growth & White Good million LED bulbs EV and charging Penetration and 35 million infrastructure LED streetlights to be deployed Solar Installed Cities with Over Half-Million base expected to Metros to double AC Drives will be go up by 10x; (7 to 14) by 2020, added in the Wind by 2-3x in 19 More Cities in industry, annually 2020 Plan 2017 2018 2019 2020 Harmonics to increase by ~ 50-60% by 2020, from the current levels with adverse effect on other PQ indices too. 4
Powering Tomorrow's India Efficiency Without Quality? High Impact on Energy Efficiency ----- > LEDs Factory Legacy Automation New Gen VFD UPS/VFD Bubble size Legacy UPS indicates Inverters relative LOAD estimate Arc IT Equipment Furnaces Overloading of Low Telecom Existing Infra Infrastructure Old Motors (Xfmr/cable) Impact on Power Quality ----- > High Low 5
Poor Power Quality From Harmonics Figure A Figure B These sinusoidal wave shapes contain Presence of harmonics increases RMS and peak many high frequency components called current of the waveform. This increases over “Harmonics” 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. 6
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 Frequent PLC & Misoperation Telephone Tripping of Computer of SCR Interference Circuit Failures Drives Breakers Insulation Capacitor Overheating Interference Resonance Failures Failures Supply Burning Out Malfunctioning Severe Lamp & Machine Frequent Fuse Distribution Small Auxiliary of Electronic Computer Vibration Blowing System Equipment Equipment Screen Flicker Distortion 7
The PQ Challenge • 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 8
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 To propagate a common Platform to monitor, measure and ensure harmonics & power quality compliance assurance Industry’s Technology Benefits all first! Neutral Stakeholders 13
The Platform UNIFIED software tool to improve compliance assurance of power quality parameters Restricted Restricted Free Access Access (Version 1) (Version 3) (Version 2) 14
Inviting Evangelists & Associates Lead/Support Resources to Financial Grant Partner for propagate for Platform stakeholder platform (People, consortium Infrastructure etc.) Drive user Knowledge to empanelment, structure and especially scale up SMEs Platform 15
Thank You www.apqi.org 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> 16
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