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PV System Quality and Performance

PV System Quality and Performance. Suryacon - Jan. 2018, Pune Vaman Kuber Founder & CEO, Solar Systems Solutions (Sol2Sys), Pune. Contents. Quality Design Aspects Electrical Design Highlights Safety and Protection Performance Monitoring Performance Optimization. Plant Generation.

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PV System Quality and Performance

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  1. PV System Quality andPerformance Suryacon- Jan. 2018, Pune Vaman KuberFounder & CEO, Solar Systems Solutions (Sol2Sys), Pune

  2. Contents • Quality Design Aspects • Electrical Design Highlights • Safety and Protection • Performance Monitoring • Performance Optimization Vaman Kuber

  3. Plant Generation Vaman Kuber

  4. Governing Factors • Generation • Performance Ratio • POA Insolation • Plant Availability • Performance Ratio • System Loss Factors • Module Degradation Vaman Kuber

  5. Defining PR and CUF • Potential Energy = Rated Array kWp x (24 x 365) h • Capacity utilization factor (CUF) : Generation (kWh) / Potential Energy (kWh) • Rated Energy = Rated Array kWp x POA PSH • Plant performance ratio (PR):Generation (kWh) / Rated Energy (kWh) • Generation (kWh) = Rated Energy – Energy Losses • Generation (kWh) = Rated Energy x PR Vaman Kuber

  6. System Loss Diagram Installation Operation Design Vaman Kuber

  7. Quality-a step ahead! • Year on year performance for reduced LCOE • Quality is key to long term performance • Quality governs safety, reliability and durability • Standards Compliance is a good start • Quality Value Chain: Feasibility through to O&M Vaman Kuber

  8. Factors governing Quality • Feasibility and Design Inputs • Components Selection and QAP • PV-Inverter-BoS Design Integration • Installation and Test Processes • Monitoring and Performance Evaluation • Operation and Maintenance Practices • Quality Checks, Feedback and Improvements Vaman Kuber

  9. Quality Design Aspects • PV Module, Inverter and BoS Selection and QAP • Plant & Array Layout: Tilt, Inter-row Spacing, Inverter Placement • Safety & Protection: Human, Electrical, Grounding, LA, SPD • Electrical Design: PV-Inverter, Cabling, Protection, Switchgear, Power Evacuation • Structure Design: Wind Resistance, Material, Surface Treatment, Fasteners, pedestals • Monitoring and Communication Vaman Kuber

  10. Quality Electrical Design • Module Power and Current Mismatch • PV-Inverter Sizing and Integration: • Max. Power Point Voltage, Grounding, PID • DC Overloading • Inverter MPP Tracking and Conversion Efficiency, Thermal Design • String level Monitoring • Protection: Fuses, SPDs • DC Cabling: • Layout Optimization • Sizing and Power Loss • Terminations- Number and Quality • AC Cable Sizing and Power Loss • Safety & Protection Vaman Kuber

  11. Performance Monitoring • Energy Generation, POA Radiation and Module back surface temperature Monitoring • Daily, weekly, monthly and yearly performance evaluation • Compare with estimates and make corrections Vaman Kuber

  12. 500kWpPlant Performance Insolation Vaman Kuber

  13. Performance Evaluation • DC Performance • kWp DC Rating • POA Insolation • DC Energy • Inverter Performance • AC Performance • kW AC Rating • AC Energy Vaman Kuber

  14. Inverter Performance • DC and AC energy generation • Inverter power and energy efficiency • Inverter Performance Ratio • MPP input voltage, current and power • String current • Shading, soiling and connectivity Vaman Kuber

  15. DC and AC Performance • Thermal loss • Soiling loss • DC cable loss • AC cable loss Vaman Kuber

  16. Shadow Analysis MPPT Input Monitoring Vaman Kuber

  17. Specific Generation • Base Line Specific Generation • POA Radiation and Expected Generation • Quantify Effect of Dust Vaman Kuber

  18. Inverter Performance Vaman Kuber

  19. Inverter Generation Profiles Generation Loss Vaman Kuber

  20. Performance Optimization • Low temp variation of module power • Better response to low and diffuse light • Reduced mismatch of modules • Efficient module cleaning regime • Improved MPPT efficiency • Improved Inverter efficiency • Optimized DC and AC cable lengths and size • Reduced number of interconnections Vaman Kuber

  21. System level Standards • IEC 62548 - Installation and Safety requirements for photovoltaic (PV) arrays including DC array wiring, electrical protection devices, switching and earthing provisions. • IEC 62446: 2009 - Grid connected PV systems – minimum requirements for system documentation, commissioning tests, and inspection. • IEC 61724 - Photovoltaic system performance monitoring - Guidelines for measurement, data exchange and analysis. • IEC61727 – Characteristics of the Utility Interface of PV Systems • CEA Technical Standard for Connectivity to Grid-2012 Vaman Kuber

  22. Safety & Protection • IEC 62548: Installation and Safety requirements for PV Arrays • String, Sub-array and Array Overcurrent Protection Device • String, Sub-array and Array Disconnection Device • String, Sub-array and Array Cable Sizing • Equipotential Bonding and Protective Earthing • Earth Leakage Monitoring and Protection • System Earthing: IEC 62561-7 • Lightning Arrestor: IS/IEC 62305-1, 2, 3 and 4 • Surge Protection Devices: IEC 61643-11 (AC) and -31 (DC) Vaman Kuber

  23. Solar PV Project Life Cycle Value Addition enhancesQuality, Performance and Returns Vaman Kuber

  24. Vaman Kuber

  25. Quality Packs Vaman Kuber

  26. Quality Pack Deliverables Vaman Kuber

  27. Conclusion • Life Cycle Cost reduction by maximizing Generation • Maximum Generation by optimizing performance • Performance optimization by quality design integration, monitoring and feedback • Sustainability achieved through Quality Value Chain Vaman Kuber

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