Techno-Commercial aspects in Solar Power Development in Odisha Land - - PowerPoint PPT Presentation

Techno-Commercial aspects in Solar Power Development in Odisha

Land Related Issues

i. Availability. ii. Quality

• iii. Ownership
• iv. Cost

Comparison Between Technologies

Sl No. Parameters Crystalline Thin film 1 Efficiency 13 to 16 % 8 to 12 % 2 Output/ MW High Varies as light 3 Performance in low light. Poor Better 4 Cost of cell High Low 5 Module of weight Light Heavy 6 Land required per MW 4 to 5 7 to 8 7 Maintenance Less High 8 De-Rating Low More 9 Availability Easy Limited 10 Temperature effect Yes Less 11 Stabilization Stable After 4-6 months

PV Related Issues

• i. Domestic/ Imported.
• ii. D.C and A.C Capacity.
• iii. Technology.
• iv. Module capacity and authenticity requirement
• v. Specifications to be provided.

Minimum technical requirement as per MNRE

• Confirm to standard.
• Traceability

i. Manufacture.

• ii. Month and Year.
• iii. Country of origin.
• iv. I-V curve of the module.
• v. Wp, Im, Vm and FF
• vi. Sl No: and module no
• vii. Test Certification.

viii.Warranty

STANDARDS

• Crystalline Modules : IEC 61215
• Thin film Modules : IEC 61646
• Module Safety : IEC 61730
• PV module (corrosive atmosphere) : IEC 61701
• PCU and inverter efficiency : IEC 61683

Modules Mounting Structures

• Design of Members
• Height and tilt angle.
• Foundation.
• Tracking.

Effect of Tracking

Sl No. Mode Energy Yield Land Requirement 1 Fixed Horizontal

• 8 to 9%
• 50% to 30%

2 Single Axis Seasonal +3 to 5% +20 to 30% 3 Single Axis Daily +20 to 25% +20 to 40% 4 Two Axis +25 to 30% +80 to 120%

Balance of System

• Cables
• Power Control Unit. Matching inverter, surge

protection , MPPT, Containerised design.

• Wake up and sleep mode.
• Paralleling (RMU/ individual feeders)

EVACUATION

• Voltage level.
• Transmission line cost and time.
• System study.
• Pooling sub-station requirement.
• Stability Problem

Protection features and grid integration

• DC side protection.
• Over voltage/ SPD protection to be provided

between +ve to E, -ve to E & +ve to –ve.

• Both +ve and –ve should be fuse protected and

DC switch be provided.

• Inverter Protection.
• DC side : Breaker, SPD, Fuse, Capacitor.
• AC Side : Filter, Varistor, AC breaker.

Grid Integration

• Isolation in AC side.
• AC:- OV, UV, OC, OC in stages, low f, high f

protections.

• DC:- OV, UV, OC, EF, reverse polarity.
• Grid isolation and abnormality.
• Emergency stop.
• Harmonics and reactive power consideration.
• LVRT and such other additional features.

Rooftop Installation

• Installation conditions.
• Capacity Limitations
• Sale of Energy (Net Metering, GBI)
• Commercial Transaction Issues.

Keeping cost of energy low

• Tariff based bidding.
• Turnkey Contract.
• Turnkey contract with complete freedom for

design.

• Working in PPP mode.
• Reduction in O&M period.
• Govt. help through different schemes.
• Taking advantage of economy of scale (Solar

Parks)

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