Conducted EMI mitigation in transformerless PV inverters ...
PV Power Plants Risk Mitigation - Feria Exposolar · PV Power Plants Risk Mitigation Cumulative...
Transcript of PV Power Plants Risk Mitigation - Feria Exposolar · PV Power Plants Risk Mitigation Cumulative...
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PV Power Plants Risk Mitigation
Cumulative global installed solar photovoltaic (PV) capacity is
set to continue its growth from 271.4 Gigawatts (GW) in 2016 to
756.1 GW by 2025, registering a compound annual growth rate
(CAGR) of 13.1%........
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No. 1 in PV plant assessment and product testing.
More than 35 years of experience in PV.
Inspected PV projects representing more than 20GW.
Power plant inspections since 1990.
8,000 m2 of lab testing areas
250+ PV experts worldwide.
TUV Rheinland
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TUV Rheinland
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TUV Rheinland
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Why are PV investments
growing world wide?
Is it easy to invest in PV?
What are the actual trends?
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Source IRENA
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Investment models and TrendsMarket Shift
Industry Maturity
Customer Orientation
Model
Focus
Cost andPerformance
Juvenile market
Sellers
FIT
OPEX
Module efficiencyWp cost
Mature
Buyers
Auction / PF / PPA
CAPEX
Total system cost Energy Yield
Leveled cost of energyBankability / Insurability
BEFORE NOW
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Investment models and Trends
FITPROJECT F.
AUCTION
PPA
• Easy Financing model• Political RISK• Focus in OPEX• Resource analysis. • Due-diligence. Statistical analysis of
radiation. Quality issues in manufacturing.
• EPC experience.
• Project Finance• Lenders• Bankability• Focus in CAPEX• Engeneering. • Due-diligence. • EPC experience• Energy Yield• Price Driven.
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Investment models and Trends - Basic model PF
SPV
(Equity + Loan)
Equity
Investor
Bank
Utility,
Grid Operator
Insurance
company
Equity
20…30%
Loan
70…80%
Energy
salesBankable
securitiesO & M
company
All risks +
interruption
of operation
Liability
EPC
company
Guarantees
O & M
Contract
Cash
flow
Debt
service
Rate of return
EPC
Contract
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Main Stakeholders
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Loss of Revenue, Risks
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Key risk factors that influence solar plant returns
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Some data
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Technical Risk Matrix of PV Power Plant
Production
Cell mismatch…Modules
Grounding
Inverter
Mounting Structure
Connection & Distribution Boxes
Cabling
Weather Station
Transformer
Storage System
Planning / Development Installation / Transportation Operation / Maintenance
MPPT Issues…
Mounting Structure Corrosion…
Material Incompatibility…
Broken Connector…
Wrong Materials…
…
…
Low quality storage system…
Shadow Diagram…
Inverter Wrongly Sized…
Roof and Static Analysis
missing…
Wrong Sized Cable Gland…
Cable undersized…
No grounding system…
Shadow and Soiling of
irradiance sensors…
Cabin Doors not grounded…
Battery Wrongly Sized…
Mishandling…
Unstable Installation…
Screw not fixed…
Lack of Strain Reliefs…
Different Type of connectors…
Grounding missing…
Misalignment between the solar
irradiance sensors and Array…
Missing Labeling…
Storage system in not ideal
environment conditions…
Hot Spot…
Low Performance…
Damage During Maintenance
Work…
Missing Protection…
Cut, Pressed and/or Broken
Cables…
Broken grounding…
Damaged Sensors…
Wrong Transformer
Configurations…
Operation Problem with PV
inverters…
Equipment
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Quality management of supply chain for PV power plant
development – Example equipment failures
Foundations Rack Connector Substrate
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Result of an internal study: Failures/defects in power plants
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Technical Risk Matrix of PV Power Plant
Production
• Incorrect Soldering
• Cell broken
• Cell mismatch
• Cell overlap
• Bubbles
• Undersized bypass diode
• Junction box adhesion
• Delamination at the edges
• Visually detectable hot
spots
• Failed insulation test
• Failure on mechanical load
• Defective label solar module
• PID
• Lack of certification
• Incorrect Power Rating
Modules
Planning / Development Installation / Transportation Operation / Maintenance
• Glass breakage
• Soiling losses
• Shadow diagram
• Modules mismatch
• Modules not certified
• Flash test report not
available or incorrect
• Modules weight
• Mechanical resistance
• No protection against
reverse current
• Different types of modules
• Lack of experience in the
field
• Special climatic conditions
not considered(salt
corrosion, ammonia,..)
• Module mishandling (Glass
breakage)
• Module mishandling (Cell
breakage)
• Defective backsheet
• Soiling
• Breakage during transport
and installation
• Modules fixing system
• Module frame damage
• Module plug connectors
substituted
• Incorrect connection of
modules
• Short circuit or defect at
modules
• Hot Spot
• Delamination
• Glass breakage
• Soiling losses
• Shading losses
• Snail track
• Cell cracks
• Defective backsheet
• Overheating junction box
• PID
• Failure of bypass diode and
junction box
• Corrosion in the junction
box
• EVA discoloration
• Module degradation
Equipment
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PV Module Product Quality - Examples for PV module failures
Examples for PV module failures
Cell cracks Delamination
Junction box failure
Glass breakage
Potential induced
degradationBypass diode failure
Frame breakage
Safety issues
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Risk : Performance (Yield) and Climatic Conditions
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PV Module Product Quality – Failures in TestingTÜV Rheinland has analyzed a total of 2000 certification projects conducted at the
Cologne Solar Testing Centre from 2002 to 2012.
1740 projects for
C-Si PV Module
370 projects for thin
film PV Module
Annual percentage of failure in IEC projects. Distribution of failures in IEC projects from 2006 to 2013.
Source: IEA PVPS 2014
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PID- Principal riesgo de perdida de producción
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Initial Degradation
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Wrong power classification!
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Performance loss through soiling
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Project Bankability
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How to get a project bankable? How to reduce risks?
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How to get a project bankable? How to reduce risks?
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How to get a project bankable? How to reduce risks?
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How to get a project bankable? How to reduce risks?
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PV asset lifecycle
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Quality assurance and risk minimization
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Photos
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Photos
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Photos
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谢谢! Thanks for your attention! Gracias por Su Atención
Preguntas?
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Vitor Rodrigues
Regional Field Manager
PV Power Plants & Systems
Solar/ Fucelcell Technology
Spain / SAM
www.tuv.com