solar pv dc concepts

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  • 1. SteelPlantsPowerPlantsOil & GasPlantsHeavyIndustriesSOLAR PV DC ENGINEERING CONCEPTSPrabhuraj HarakangiBE(E&E), M.Tech Energy 8147814995II Om Bhaskaraye Vidmahe Divakraraye Dheemahi Tanno Suryah Prachodayat II

2. Types OF Solar PV SYSTEMS :2 Stand alone system Solar VFD System OFF Grid / Hybrid System On Grid / Grid Tied System:1) Net Metering (IMPORT - EXPORT)2) Captive Consumption 3. 3Net Metering (IMPORT - EXPORT) :ACLOADSGrid SupplySolar PV Plant Grid Tied InverterUPSEMBUS BAR 4. The solar modules generate DC electricity. The DC power goes through a Solar4ON Grid Inverter Solar Grid Tied Inverter: performs the conversion of the variable DC output into aclean sinusoidal AC power Inverter output connected to Bus Bar (Distribution Panel) The Solar Current will be given lead angle in synchronization process and it willbe forcefully injected into the bus barProtections : DC Side modules will be given with SPD, DC Dis-connector Switch which willprotect the Solar System For all kinds of faults the Solar Inverter will react first and ISOLATE itself fromthe system in Microseconds of time ANTI ISLANDING 5. 5Advantages : Simple and Safe systems which gives Direct Savings and Revenue Load Independent system Most Efficient System, Very Least Losses & Maintenance Free System 25 years of Guaranteed Generation with faster Payback Period 1kW of Solar Power Plant Generates 5.5Units of Electricity per Day Accelerated Depreciation on the InvestmentLimitations: No Back up will be given from the system, since solar power directly utilized Stable Grid is a must Infrastructure problem Policy from Govt is required 6. 6Captive Consumption System :ACLOADSGridDGGrid Tied InevrterAMFDUPSSolar PV PlantBUS BAR 7. 7 Working Principle: SYNCHRONISATION Feed: Least Resistive Path Profit: Direct Savings on Electricity Bills, Save more when synchronized withDiesel Generator Prerequisites:Detailed Site AnalysisDetailed Load AnalysisDG Rating and Health of DG 8. 8Detailed Site Analysis : Location: State, Country with Latitude and Longitude Shadow free area available: .. Sq meters North to South: meters East to West : .. meters Type of Roof : Flat Roof or Tilt Roof If Flat Roof : RCC or any other If Tilted : Metal Sheet, Asbestos Sheet, RCC roof or any other Tilt Face south to north or east to west and Tilt Angle: Obstacles: Cement Columns, AC Fan Units , Chiller Unitsand other if any - Height of Obstacle Attachments: Google Map, Layout of Site or Photo of Site 9. 9Google earth for AREA : Marking the polygon points on google earth and importing it in earthpoint.uswebsite to find out the areaName Shape TypeNumberof PointsArea(Sq Meters)Perimeter/ Length(Meters)Centroid/ Mid-Point(Degrees)AREA 1 Polygon 4 3,152.0951 257.0110 18.0906738, 073.9988409AREA 4 Polygon 4 1,810.8342 221.3670 18.0906385, 073.9985618TOTAL AREA 4,962.9293 10. 10Marking site using GPS Machine: Garmin GPS Unit Etrex 20: Imported to Base Camp, Map Source andGoogle Earth for detailed location analysis Area, Distance, Elevation 11. 11Meteonorm database: 12. 12PV Syst Challenges: 13. PV Syst Challenges:13 Double orientation Voltage mis-match,higher losses Single orientation Less losses, MultipleMPPT option Vertical stringing 14. 14Tlit Angle : Tilt angle is equal to Latitude Losses due to Tilt Angle Lower Latitude advantages Super structure concept 15. 15Structure Types: 16. Structure Types:16 17. 17Detailed Electrical Survey: Sources of Energy : Electricity Board :Contract Demand -kVA, Peak Load - kVA Diesel Generator : Rating - kVA (Make and Life inYears) Other Sources: Please specify with details Load and Consumption Details : Load type : 1 Phase or 3 Phase Type of Loads : Mention Type of Machines and Equipmentsused Operating Hours : Hours and am (if Load works in 2 or 3Shifts, weekly holidays) Consumption : .Units (Average of last six months) 18. 18Case Study in absence of DG: DG of 125kVA 100kW Minimum 30% Load on DG : 30kW for safe and healthy operationLOAD SOLAR RESULT COMMENTS100kW 50kW SUCCESS Remaining will be supplied by DG100kW 70kW SUCCESS DG operates at exactly 30% Load100kW 80kW FAILURE DG is unsafe, DG synchronize but may supply atHigh Frequency and Inverter out of Sync100kW 120kW FAILURE Reverse feeding from Solar to DG, DG will trip.No synchronization Total Block outPossible Solutions: Proper Solar PV capacity selection Alternate energy storage: Automatic Response Devices or PLCs Compressed air technology using VFDs instead of Battery and Fuel Cells 19. 19Inverter Selection: Inverter types: Central Inverters and String InvertersPossibility of breakdown and Cost difference Inverter Voltage Range Inverter Efficiency curve with Power Inverter Efficiency curve with Voltage Protection devices availability: DC Fuses, DC dis connector, SPD Number of MPPTs and inputs 20. 20Protection Devices: IP 65 Box BLOCKING DIODE: DC Fuses SPD or MOV (T-MOV): Lightning Arrestor Earthing DC dis connector 21. 21 22. Communication Details:22Thank YouGlentec Engineering Services LLPCorporate Office:# 48, 2nd Floor, 4th Stage, 4th Block,Siddaiah Puranik RoadBasaveshwara Nagar,Bangalore-560 079For more details about us, refer below linkwww.glentec-eso.comContact Details:M: +91 9845307614O: +91 80 2340 9622Email:


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