This standard specifies the technical, safety, and power quality requirements for interconnecting solar photovoltaic (PV) power systems with the electrical distribution grid. It provides criteria for voltage, frequency, protection schemes like anti-islanding, and harmonic limits to ensure the safe, reliable, and stable operation of the grid with integrated PV generation.
Specifies general requirements for the safe and reliable grid interconnection of photovoltaic (PV) systems, including protection and operational aspects.
Quick Reference Values
Nominal grid frequency50 Hz
Continuous frequency operating range47.5 Hz to 52.0 Hz
Anti-islanding detection time limit< 2 seconds
Total Harmonic Current Distortion (THDi) limit< 5%
Power factor requirement at full output> 0.9 lagging
DC injection limit< 0.5% of inverter's rated output current
Practical Notes
Anti-islanding protection is a critical safety feature; its functionality must be tested and verified during commissioning as per Clause 8.
Ensure the selected grid-tie inverter has a valid type test certificate conforming to IS 16221 and other relevant standards mentioned herein.
Always consult the local electricity distribution company (DISCOM) for their specific interconnection requirements, which may be in addition to this standard.