IEC 61727 pdf download Photovoltaic (PV) systems – Characteristics of the utility interface
1 Scope and object
This International Standard applies to utility-interconnected photovoltaic (PV) power systemsoperating in parallel with the utility and utilizing static (solid-state) non-islanding inverters forthe conversion of DC to AC.This document describes specific recommendations for systemsrated at 10 kVA or less，such as may be utilized on individual residences single or threephase.This standard applies to interconnection with the low-voltage utility distribution system.
The object of this standard is to lay down requirements for interconnection of PV systems tothe utility distribution system.
NOTE1 An inverter with type certification meeting the standards as detailed in this standard should be deemedacceptable for installation without any futher testing.
This standard does not deal with EMC or protection mechanisms against islanding.
NOTE 2 Interface requirements may vary when storage systems are incorporated or when control signals for Pvsystem operation are supplied by the utility.
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies.For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60364-7-712:2002，Electrical installations of buildings – Part 7-712: Requirements forspecial installations or locations – Solar photovoltaic (PV) power supply systems
IEC 61000-3-3:1994，Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation ofvoltage changes，voltage fluctuations and flicker in public low-voltage supply systems,forequipment with rated current <= 16 A per phase and not subject to conditional connection 1 IEC 61000-3-5:1994，Electromagnetic compatibility (EMC) - Part 3: Limits - Section 5:Limitation of voltage fluctuations and flicker in low-voltage power supply systems forequipment with rated current greater than 16 A IEC 61277:1995,Terrestrial photovoltaic (PV) power generating systems - General and guideIEC 61836:1997,Solar photovoltaic energy systems - Terms and symbols 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 power factor power factor (PF) is calculated by dividing the kilowatt-hours (kWh) by the square root of the sum of the squares of the kilowatt-hours and the kilovarhours (kVARh) over a period of time. Power factor (PF) over a period where E REAL is the energy in kWh and E REACTIVE is the reactive energy in kVARh 3.2 array field the aggregate of all solar photovoltaic arrays within a given system (see IEC 61 277) 3.3 direct current (DC) interface connections between the array field and the input of the inverter/power conditioning system 3.4 electric utility generally, an organization responsible for the installation, operation and maintenance of an electric supply and the low voltage distribution systems (see IEC 61 277) 3.5 safety disconnect control and monitoring subsystem subsystem that monitors utility grid conditions and removes the AC output of the inverter for out of bounds conditions 3.6 total harmonic distortion distortion defined as: