Technical specification of grid-connected PV inverter
1 Scope
This technical specification specifies the product classification, terms and definitions, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of grid-connected PV inverters.
This technical specification is applicable to photovoltaic power generation inverter for grid connection.
2 Normative references
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 edition of the referenced document (including any amendments) applies.
GB 4208-2008 Degrees of protection provided by enclosure (IP code) (IEC 60529: 2001, IDT)
GB 7260.2-2009 Uninterruptible power systems (UPS) - Part 2: Electromagnetic compatibility (EMC) requirements (IEC 62040-2: 2005, IDT)
GB 10593.1-2005 Measuring methods of environmental parameters for electric and electronic products - Part 1: Vibration
GB/T 191-2008 Packaging - Pictorial marking for handling of goods
GB/T 2423.1-2008 Environmental testing for electric and electronic products - Part 2: Test methods - Tests A: Cold (IEC 60068-2-1: 2007, IDT)
GB/T 2423.2-2008 Environmental testing for electric and electronic products - Part 2: Test methods - Test B: Dry heat (IEC 60068-2-2: 2007, IDT)
GB/T 2423.3-2006 Environmental testing for electric and electronic products - Part 2: Testing method - Test Cab: Damp heat steady state (IEC 60068-2-78: 2001, IDT)
GB/T 3859.2-1993 Semiconductor convertors - Application guide (IEC 60146-1-2: 1991, EQV)
GB/T 12325-2008 Power quality - Deviation of supply voltage
GB/T 12326-2008 Power quality - Voltage fluctuation and flicker
GB/T 13384-2008 General specifications for packing of mechanical and electrical product
GB/T 14549-1993 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543-2008 Power quality - Three-phase voltage unbalance
GB/T 15945-2008 Power quality - Frequency deviation for power system
GB/T 17626.2-2006 Electromagnetic compatibility (EMC) - Testing and measurement techniques - Electrostatic discharge immunity test (IEC 61000-4-2: 2001, IDT)
GB/T 17626.3-2006 Electromagnetic compatibility - Testing and measurement techniques - Radiated radio-frequency electromagnetic field immunity test (IEC 61000-4-3: 2002, IDT)
GB/T 17626.4-2008 Electromagnetic compatibility - Testing and measurement techniques - Electrical fast transient/burst immunity test (IEC 61000-4-4: 2004, IDT)
GB/T 17626.5-2008 Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test (IEC 61000-4-5: 2005, IDT)
GB/T 17626.6-2008 Electromagnetic compatibility - Testing and measurement techniques - Immunity to conducted disturbances induced by radio-frequency fields (IEC 61000-4-6: 2006, IDT)
GB/T 17626.8-2006 Electromagnetic compatibility - Testing and measurement techniques - Power frequency magnetic field immunity test (IEC 61000-4-8-2001, IDT)
GB/T 17626.12-1998 Electromagnetic compatibility - Testing and measurement techniques - Oscillatory waves immunity test (IEC 61000-4-12: 1995, IDT)
GB/T 17626.14-2005 Electromagnetic compatibility - Testing and measurement techniques - Voltage fluctuation immunity test (IEC 61000-4-14: 2002, IDT)
GB/T 18479-2001 Terrestrial photovoltaic (PV) power generating systems - General and guide (IEC 61277: 1995, IDT)
GB/T 20514-2006 Photovoltaic systems - Power conditioners - Procedure for measuring efficiency (IEC 61683: 1999, IDT)
GB/Z 6829-2008 General requirements for residual current operated protective devices
IEC 62109-1-2010 Safety of power converters for use in photovoltaic power systems - Part 1: General requirements
IEC 62109-2-2011 Safety of power converters for use in photovoltaic power systems - Part 2: Particular requirements for inverters
EN 50530-2010 Overall efficiency of grid connected photovoltaic inverters
IEC 60990-1999 Methods of measurement of touch current and protective conductor current
IEC 62116-2008 Test procedure of islanding prevention measures for utility - Interconnected photovoltaic inverters
Q/GDW 617-2011 Technical rule for photovoltaic power station connected to power grid
Q/GDW 618-2011 Technical procedures for photovoltaic power station connected to power grid
3 Terms and definitions
For the purposes of this technical specification, the following terms and definitions apply.
3.1 photovoltaic grid-connected inverter
equipment that converts DC power generated by solar cells into AC power and feeds it into power grid
Note 1: Inverters mentioned in this specification refer to photovoltaic grid-connected inverters;
Note 2: The technical requirements and test methods specified in this specification are not applicable to inverters in AC MODULE.
3.2 photovoltaic array simulator
power source for simulating static and dynamic current and voltage characteristics of photovoltaic array
3.3 inverter AC output terminal
power outputting connection point on AC side of the inverter
3.4 maximum powder point tracking
automatic adjustment behavior of tracking and controlling the changes of output voltage and current caused by the changes of surface temperature and solar irradiance of photovoltaic modules to keep the array working at the maximum output all the time, and further to obtain the maximum power output
3.5 maximum powder point tracking efficiency
ratio of the DC power obtained by the inverter under test to the power theoretically provided by the PV simulator working at the maximum power point within the specified measurement period TM
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
3.1 photovoltaic grid-connected inverter
3.2 photovoltaic array simulator
3.3 inverter AC output terminal
3.4 maximum powder point tracking
3.5 maximum powder point tracking efficiency
3.6 conversion efficiency
3.7 overall (total) efficiency
3.8 islanding
3.9 intentional islanding
3.10 unintentional islanding
3.11 anti-islanding
3.12 simulated utility
3.13 quality factor
3.14 resonant frequency
3.15 temporary
4 Product classification
4.1 Product types
4.2 Output power spectrum
5 Technical requirements
5.1 Service conditions
5.2 Quality requirements for body and structure
5.3 Performance indexes
5.4 Electromagnetic compatibility
5.5 Protection function
5.6 Array insulation impedance detection
5.7 Array residual current detection
5.8 Communication function
5.9 Automatic power-on/power-off
5.10 Soft start
5.11 Insulation voltage resistance
5.12 Degrees of protection provided by enclosure
5.13 Environmental test requirements
5.14 Power control and voltage regulation
5.15 Continuous working test
5.16 Temperature rise
6 Test methods
6.1 Test environmental conditions
6.2 Quality inspection of body and structure
6.3 Performance index test
6.4 Electromagnetic compatibility test
6.5 Protection function test
6.6 Array insulation impedance detection test
6.7 Array residual current detection test
6.8 Communication function test
6.9 Automatic power-on/power-off test
6.10 Soft start test
6.11 Insulation resistance and withstand voltage tests
6.12 Test for degree of protection provided by enclosure
6.13 Environment test
6.14 Power control and voltage regulation test
6.15 Continuous working test
6.16 Temperature rise test
7 Inspection rules
7.1 Inspection classification
7.2 End-of-manufacturing inspection
7.3 Type inspection
8 Marking, packaging, transportation and storage
8.1 Marking
8.2 Packaging
8.3 Transportation
8.4 Storage
Annex A (Informative) Technical parameters of grid-connected PV inverter
Annex B (Informative) Selection of anti-islanding protection scheme
Annex C (Informative) Transient voltage protection
Annex D (Informative) Inverter efficiency
Annex E (Informative) Test procedure for dynamic maximum powder point tracking (MPPT) efficiency of inverter
