Empanellment of Rooftop Grid Connected SPV Power Plant started. The last date and time for submission of E-bids is extended upto 20.07.2017 at 4.30 PM and opening of bids will be on 21.07.2017 at 11.30 a.m. For more details, pl visit www.etender.punjabgovt.gov.in.
Beneficiaries of projects above 5 KW capacity are required to submit hard copies of all reports along with necessary certificates in PEDA Office in addition to online submission for release of subsidy


Technical specifications

General Technical specifications

1. SPV Modules

  • Indigenously manufactured PV modules should be used.
  • The PV module should have crystalline silicon solar cells and must have a certificate of testing conforming to IEC 61215 Edition II / BIS 14286 from an NABL or IECQ accredited Laboratory.
  • The power output of the module(s) under STC should be a minimum of 100 Wp at a load voltage* of 16.4 ± 0.2 V. Vnom 12V.
  • The open circuit voltage* of the PV modules under STC should be at least 21.0 Volts.
  • The module efficiency should not be less than 14 %.
  • The terminal box on the module should have provision for opening to replace the cable, if required.
  • PV modules must be warranted for their output peak watt capacity which should not be less than 90 % at the end of 10 years and 80% at the end of 25 years.
  • Identification and Traceability

Each PV module used in any solar power project must use a RF identification tag. The following information must be mentioned in the RFID used on each module (This should be inside the laminate and must be able to withstand harsh environmental conditions.)

  • Name of the Manufacturer of PV module
  • Name of the manufacturer of Solar Cells.
  • Month and year of the manufacture (separately for solar cells and module).
  • Country of origin (separately for solar cells and module).
  • I-V curve for the module.
  • Peak wattage, Im ,Vm and FF for  the module.
  • Unique serial no and model no of the module.
  • Date and year of obtaining IEC PV module qualification certificate.
  • Name of test lab issuing IEC certificate
  • Other relevant information on traceability of solar cells and module as per ISO  9000 series.

2. Battery

  • Tubular Lead Acid battery having minimum rating of 2 V 200Ah &12V, 150 Ah & higher capacities at C/10 discharge rate.
  • 75% of the rated capacity of the battery should be between fully charged and load cut off conditions.
  • Battery should conform to the latest BIS/ International standards.

3. Balance of system (BOS)

  • Cables should confirm to applicable standards i,e IEC 60189, IS 694/ IS1554, IS/IEC 69947.
  • Switches / Circuit Breakers / Connector should confirm to IS/IEC 60947 part I,II,III, EN 50521 standards.
  • Junction Boxes should confirm to IP 65 for outdoor / IP 21 for indoor use and IEC 62208 standards.
  • SPV system design should  confirm to IEC 62124 standards
  • Installation of systems  should confirm to IEC 60364-7-712  standards

4. Power Conditioning Unit (PCU)

The PCU should convert DC power produced by SPV modules, in to AC power and adjust the voltage & frequency levels  to suit the local grid conditions. The inverter shall interconnect and feed power to the LT power supply of the building and also shall have the provision to power critical loads.

Common Technical Specification :

Control Type : Voltage source, microprocessor assisted ,  output regulation

Out put voltage : Single Phase, 230 V ac ( +12.5 %, - 20 % V ac)

                       : 3 phase, 415 V ac ( +12.5 %, - 20 % V ac)

Frequency:  50 Hz ( +3 Hz, -3 Hz)

Total Harmonic Distortion : less than 3%

Operating temperature Range : 0 to 55 deg C

Inverter standards :

Inverter should comply with IEC 61683/IS 61683 for efficiency and Measurements and should comply IEC 60068-2 (1, 2, 14, 30) / Equivalent BIS Standard for environmental testing. Inverter should supervise the grid condition continuously and in the event of grid failure (or) under voltage (or) over voltage, Solar System should be disconnected by the circuit Breaker / Auto switch provided in the inverter.                

Power Control : MPPT

Other important Features/Protections required in the INVERTER

  • Automatic morning wake-up and nightly shutdown
  • Mains (Grid) over-under voltage and frequency protection
  • Fool proof protection against ISLANDING.
  • Included authentic tracking of the solar array’s maximum power operation voltage (MPPT).
  • Array ground fault detection.
  • LCD and piezoelectric keypad operator interface Menu driven
  • Automatic fault conditions reset for all parameters like voltage, frequency and/or black out.
  • Surge arresters on AC and DC terminals for over voltage protection from lightning-induced surges.
  • INVERTER should be rated to operate at 0 –55 deg. Centigrade unless provision for air conditioning is included in INVERTER
  • All parameters should be accessible through an industry standard communication link.
  • Overload capacity (for 10 sec) should be 150 % of continuous rating

Harmonics Standard :

As per the standard of IEEE 519, the permissible individual harmonics level shall be less than 3% (for both voltage and current harmonics) and Total Harmonics Distortion (THD) for both voltage and current harmonics of the system shall be less than 5%.

Technical and interconnection requirements

Overall conditions of service 

State Distribution/Supply Code 

State Distribution/Supply Code 

Overall Grid Standards 

Central Electricity Authority (Grid Standard) Regulations 2010 

Central Electricity Authority (Grid Standard) Regulations 2010 

Equipment 

BIS / IEC / IEEE 

BIS / IEC / IEEE 

Meters

Central Electricity authority (Installation & operation of meters) Regulation 2006 as amended time to time 

Central Electricity authority (Installation & operation of meters) Regulation 2006 as amended time to time 

Safety and supply 

Central Electricity Authority(measures of safety and electricity supply) Regulations, 2010 

Central Electricity Authority(measures of safety and electricity supply) Regulations, 2010 

Harmonic Requirements Harmonic Current 

IEEE 519 CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations 2013 

IEEE 519 CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations 2013 

Synchronization 

IEEE 519 CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations 2013 

Photovoltaic system must be equipped with a grid frequency synchronization device. Every time the generating station is synchronized to the electricity system. It shall not cause voltage fluctuation greater than +/- 5% at point of connection. 

Voltage 

IEEE 519 CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations 2013 

The voltage-operating window should minimize nuisance tripping and should be under operating range of 80% to 110% of the nominal connected voltage. Beyond a clearing time of 2 second, the photovoltaic system must isolate itself from the grid. 

Flicker 

IEEE 519 CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations 2013 

Operation of Photovoltaic system should not cause

Frequency 

IEEE 519 CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations 2013 

When the Distribution system frequency deviates outside the specified conditions (50.5 Hz on upper side and 47.5 Hz on lower side), There should be over and under frequency trip functions with a clearing time of 0.2 seconds. 

DC injection 

IEEE 519 CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations 2013 

Photovoltaic system should not inject DC power more than 0.5% of full rated output at the interconnection point or 1% of rated inverter output current into distribution system under any operating conditions. 

Power Factor 

IEEE 519 CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations 2013 

The photovoltaic system in the event of fault, voltage or frequency variations must island/disconnect itself within IEC standard on stipulated period. 

Overload and Overheat 

IEEE 519 CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations 2013 

The inverter should have the facility to automatically switch off in case of overload or overheating and should restart when normal conditions are restored. 

Paralleling Device 

IEEE 519 CEA (Technical Standards for Connectivity of the Distributed Generation Resources) Regulations 2013 

Paralleling device of photovoltaic system shall be capable of withstanding 220% of the normal voltage at the interconnection point. 

Meter Configuration options

 The metering system for rooftop solar system, under net-metering arrangement, shall be as elaborated below which should be applicable till such time the Central Electricity Authority notifies the standards in this matter.

a) Two Meter Configuration without Storage The metering protocol for ‘Grid connected rooftop solar PV system without storage’ and location of solar meter and consumer meter shall be in accordance with the schematic below:-

Dig1

The utility meter (Net-meter) has to be bi-directional meter to register both import grid electricity amount as well as export solar electricity amount.                                                                     

 Two Meter Configuration with Storage The metering protocol for ‘Grid connected rooftop solar PV system with storage’ and location of Solar Meter (SM) and Utility Meter (UM) shall be in accordance with the schematic below:- 

Dig2

The utility meter (Net-meter) has to be bi-directional meter to register both import grid electricity amount as well as export solar electricity amount.

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