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NB/T 10185-2019: (Technical specifications for performance testing and quality assessment of key equipment for grid-connected photovoltaic power plants)
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NB/T 10185-2019629 Add to Cart 5 days (Technical specifications for performance testing and quality assessment of key equipment for grid-connected photovoltaic power plants) Valid

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Basic data

Standard ID: NB/T 10185-2019 (NB/T10185-2019)
Description (Translated English): (Technical specifications for performance testing and quality assessment of key equipment for grid-connected photovoltaic power plants)
Sector / Industry: Energy Industry Standard (Recommended)
Classification of Chinese Standard: F19
Word Count Estimation: 27,217
Date of Issue: 2019-06-04
Date of Implementation: 2019-10-01
Regulation (derived from): Natural Resources Department Announcement No. 7 of 2019
Issuing agency(ies): National Energy Administration

NB/T 10185-2019: (Technical specifications for performance testing and quality assessment of key equipment for grid-connected photovoltaic power plants)


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical specifications for performance testing and quality assessment of key equipment for Grid-connected PV Power Plants ICS 27.160 F 19 NB Energy Industry Standards of the People's Republic of China Performance testing and quality of key equipment for grid-connected photovoltaic power plants Evaluation of technical specifications 2019-06-04 released 2019-10-01 implementation Issued by National Energy Administration

Table of contents

Foreword...III 1 Scope...1 2 Normative references...1 3 Terms and definitions...2 4 Key equipment...3 5 Testing procedures...3 6 Photovoltaic modules...3 6.1 Sampling inspection requirements...3 6.2 Product technical requirements...4 6.3 Testing requirements...4 6.4 Electroluminescence test of photovoltaic modules...9 6.5 Photovoltaic module infrared thermal imaging test...9 7 Photovoltaic mounting system...9 7.1 Sampling inspection requirements...9 7.2 Material compliance check...9 7.3 Structural verification...10 7.4 Carrying capacity check...10 7.5 Appearance and size check...10 7.6 Film thickness test of zinc coating...10 7.7 Tracking performance verification...10 8 Photovoltaic combiner box...11 8.1 Sampling inspection requirements...11 8.2 Technical requirements...11 8.3 Check items...11 9 Photovoltaic inverter...12 9.1 Sampling inspection requirements...12 9.2 Technical requirements...12 9.3 Maximum conversion efficiency...12 9.4 Power quality...12 10 Step-up transformer...12 10.1 Sampling inspection requirements...12 10.2 Requirements...12 11 Monitoring system...12 11.1 Basic function check...12 11.2 Data collection capability evaluation...13 11.3 Calculation and processing capacity evaluation...13 11.4 Performance Check...14 12 Overall system performance and quality assessment...15 12.1 Consistency Check...15 12.2 System performance...15 Appendix A (informative appendix)...18 Appendix B (informative appendix)...21

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009 "Guidelines for Standardization Work Part 1.Standard Structure and Compilation". This standard was proposed and managed by China Electrical Equipment Industry Association. Drafting organizations of this standard. China Quality Certification Center, Beijing Institute of Electrical Technology and Economics of Machinery Industry, China Inspection Group Southern Electronic Products Testing (Shenzhen) Co., Ltd., China Three Gorges New Energy Co., Ltd., Nanjing Zhonghua Nanxin Testing Technology Co., Ltd., Hanergy Mobile Yuan Holding Group Co., Ltd. Drafters of this standard. Shi Lei, Lian Qianjun, Guo Yan, Wang Zhiyong, Chen Aiguo, Shuai Zhengfeng, Wang Jianjian, Xu Yike, Zha Li. Technical specifications for performance testing and quality assessment of key equipment for grid-connected photovoltaic power stations

1 Scope

This standard specifies photovoltaic modules, bracket systems, combiner boxes, inverters, step-up transformers, monitoring systems for grid-connected photovoltaic power plants Test items and evaluation methods for key equipment. This standard applies to photovoltaic power plants that are connected to the grid through a voltage level of 35kV and above, and connected to the public grid through a voltage level of 10kV. Refer to the implementation for photovoltaic power plants of other voltage levels.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 700-2006 Carbon structural steel GB/T 1591-2008 Low-alloy high-strength structural steel GB 1094.1-2013 Power Transformer Part 1.General Rules GB 1094.2-2013 Power Transformer Part 2.Temperature Rise of Liquid-immersed Transformer GB 1094.3-2016 Power Transformer Part 3.Insulation level, insulation test and external insulation air gap GB/T 3190-2008 Chemical composition of wrought aluminum and aluminum alloy GB 5237.1-2008 Aluminum alloy building profiles Part 1.Base material GB 5237.2-2008 Aluminum alloy building profiles Part 2.Anodized profiles GB 5237.3-2008 Aluminum alloy architectural profiles Part 3.Electrophoretic paint profiles GB 5237.4-2008 Aluminum alloy building profiles Part 4.Powder spraying profiles GB 5237.5-2008 Aluminum alloy building profiles Part 5.Fluorocarbon paint spray profiles GB 7251.1-2013 Low-Voltage Switchgear and Control Equipment Part 1.General Rules GB/T 13912-2002 Technical requirements and test methods for hot-dip galvanized coatings on steel parts with metal coverings GB/T.19964-2012 Technical Regulations for Connecting Photovoltaic Power Stations to Power Systems GB/T 29319-2012 Technical Regulations for Connecting Photovoltaic Power Generation System to Distribution Network GB/T 29320-2012 Technical requirements for solar tracking system of photovoltaic power station GB 50009-2012 Building Structure Load Code GB 50794-2012 Construction Specification for Photovoltaic Power Station GB 50797-2012 Design Code for Photovoltaic Power Station DL/T 793-2012 Reliability Evaluation Regulation of Power Generation Equipment NB/T 32004-2018 Technical Specification for Grid-connected Inverter for Photovoltaic Power Generation IEC /TS 62804-1.2015 Photovoltaic modules-potential induction test method Part 1.Crystalline silicon IEC 61724-1.2017 Photovoltaic system performance inspection part 1 monitoring IEC /TS 61724-2.2016 Photovoltaic system performance inspection Part 2.Power generation capacity calculation method IEC /TS 61724-3.2016 Photovoltaic system performance. Part 3.Energy consumption evaluation method IEC /TS 62782.2016 Photovoltaic (PV) module cyclic (dynamic) mechanical load test IEC 61215-1-2016 Terrestrial photovoltaic modules-Design requirements and structural qualification-Part 1.Test requirements IEC 61215-2-2016 Photovoltaic modules for terrestrial use-Design requirements and structural qualification-Part 2.Test procedures IEC 61730-2-2016 Photovoltaic module safety-Part 2.Test requirements IEC 61853-1-2011 Photovoltaic module performance measurement and energy efficiency evaluation Part 1.Irradiance and temperature performance measurement and power rating evaluation IEC 62446-1-2016 Photovoltaic (PV) system testing, documentation and maintenance requirements Part 1.Grid-connected systems-documentation, commissioning and inspection IEC 62446-3-2017 "Photovoltaic (PV) System-Requirements for Testing and Commissioning, System Documentation and Performance Maintenance Part 3.Photovoltaic Modules and Outdoor infrared thermal imaging of power station"

3 Terms and definitions

3.1 Fastening force Use bolts or other forms of fasteners to provide grip and tightening force for connecting nodes to reduce metal fatigue. Fasteners such as bolts And the nut must be greater than the fastening force of the connection node. 3.2 Hot-dip galvanizing The process of immersing fully treated steel or cast iron parts in a molten zinc bath to form zinc and (or) zinc-stick alloy coatings on the surface Process and method. 3.3 Average coating thickness The arithmetic mean of the local thickness of the coating after sampling a certain large part or a certain batch of galvanized parts. 3.4 Service hours The number of hours the device has been in operation. 【DL/T 793-2012, 2.8.1】 3.5 Unplanned outage hours The number of hours that the equipment is in an unplanned outage state. 3.6 Photovoltaic inverter boost unit A power generation unit that includes inverters, step-up transformers and other equipment responsible for inverting the DC power of the photovoltaic system into AC power and boosting it yuan.

4 key equipment

The key equipment for grid-connected photovoltaic power plants defined in this standard includes. a) Photovoltaic modules, crystalline silicon photovoltaic modules and thin-film photovoltaic modules, excluding concentrating photovoltaic modules b) Photovoltaic combiner box, including DC combiner box and AC combiner box; c) Photovoltaic mounting system, including fixed photovoltaic mounting system and tracking photovoltaic mounting system, excluding floating mounting system; d) Photovoltaic inverters, including micro inverters, string inverters, centralized inverters, and distributed inverters; e) Step-up transformers are divided into oil-immersed step-up transformers and dry-type step-up transformers; f) Monitoring and control system.

5 Testing procedures

The key equipment and systems on the power plant site are tested according to the sampling method. The complete photovoltaic inverter boost unit is used as the power generation unit for sampling. Typical elements include. a) Equipment type, model, manufacturer; b) Structural information, including. electrical structure, supporting structure; c) Power generation. 1) Count the representative power generation units in the historical power generation of the power station in the same month (test implementation period) in the past year and the same month. When it can provide historical records of power generation, the power generation in the past one month is used for statistics. 2) According to the actual unit kilowatt power generation of each unit (kwh/kw) and the expected unit kilowatt power generation or theoretical unit kilowatt power generation The two units with the largest deviation (including positive deviation and negative deviation) and the two units with the smallest deviation are selected. yuan. 3) When there are less than 4 power generating units, all power generating units shall be regarded as the subject of random inspection. Random sampling is adopted, and the results of random inspection of key equipment should cover all typical elements.

6 Photovoltaic modules

6.1 Sampling inspection requirements In the selected power generation unit, calculate the real-time output power of the combiner box or photovoltaic string, and select the highest and lowest power generation. The median value of the combiner box or photovoltaic string, and then randomly select the photovoltaic modules according to the typical factors. If the combiner box or photovoltaic When covering typical elements, the real-time power generation should be used as the sampling basis, and the number of samples should be increased until all elements are covered. 6.2 Product technical requirements It shall have the test reports and certifications of IEC 61215 series and IEC 61730 series standards issued by nationally recognized institutions. 6.3 Testing requirements 6.3.1 Visual inspection Test according to IEC 61215-2 4.1 (MQT01). 6.3.1.1 Serious appearance defects a) The mechanical integrity of the module depends on the laminate or other adhesion forces, and the sum of the area where bubbles occur exceeds 1% of the module area; b) The loss of mechanical integrity affects the installation and work of components; c) Broken, cracked or damaged outer surface (front, back, junction box, frame); d) Any part of the short circuit or adhesive failure; e) Air bubbles or delamination forming a continuous channel between the edge of the module and the live parts; f) The output terminal fails and the live part is exposed; g) There are any signs of melting or burning on the sealing material, backplane, surface, diode or any component part; h) The crack of a single battery, and its extension line may cause the battery to fail more than 10%. 6.3.1.2 General appearance defects a) The nameplate of the component is dropped or cannot be distinguished; b) Scratches on the glass surface of the module ≥100mm; c) There are more than two obvious bubbles with diameter > 1mm in the module; d) The first layer of film is scratched on the backplane, or the scratch is ≥50mm; e) The bulge or pit area of the back plate ≥100mm2; f) A small amount of wrinkles on the back panel, 0.5mm ≤ arch starting point height ≤ 2mm; g) There is obvious dirt between the laminate cell, EVA and glass, and foreign matter and impurities are mixed into the surface of the component cell; h) There is obvious dislocation at the joint of aluminum alloy frame; or there is obvious gap at the interface; i) Weathering, abrasion, bite marks, cracks and other aging phenomena of wires, connectors or junction boxes; j) There is embrittlement of component wires; k) The wires, connectors or junction boxes are damaged, but the conductive parts are not exposed; l) Phenomena such as missing, falling off or corrosion of the component grounding wire; m) There is the phenomenon of undissolved or hollow EVA; n) Severe chalking or severe yellowing of the backplane is aging; o) The front and rear glass of the double-glass module is not tightly sealed, causing gaps or bubbles; p) Oxidation and corrosion of the silver grid of the cell; q) The diode in the component junction box is burned out or short-circuited; r) The components are affected by heavy dust, bird droppings, etc., causing the output electrical performance to drop by more than 5%. 6.3.1.3 Slight appearance defects a) A few wrinkles on the back panel, clean surface, and arch starting point ≤0.5mm; b) Poor anodized coating on the surface of the frame and scratches; c) Scratches on the glass surface of the module < 100mm; d) The scratches on the backplane of the module do not break the first film and are less than 50mm; e) The area of the bulge or pit of the back plate is less than 100mm²; f) There are obvious chromatic aberrations in the component cells; g) The components are blocked by dust, bird droppings, etc., but they have not caused hot spots or reduced electrical performance by no more than 5%. 6.3.2 Power generation performance 6.3.2.1 Test method Test according to IEC 61215-2 4.2 (MQT02) method. 6.3.2.2 Power generation efficiency The power generation efficiency of photovoltaic modules is expressed by four indicators, namely the conversion efficiency η under the conditions of STC, NOCT, LIC, HTC, and LTC. among them. a) High temperature conditions Battery temperature. 75℃ Irradiance. 1000 W m-2 b) Low temperature conditions Battery temperature. 15℃ Irradiance. 500 W m-2 6.3.3 Reliability For newly-built or expanded photovoltaic power plants, the reliability of photovoltaic modules should be tested, and those that meet the requirements of the test results should be evaluated. Determine it to meet the requirements of the corresponding quality level. For components that have been tested, the test can be omitted. The recommended tests for power stations that have been officially put into operation include PID, bypass diode thermal test and temperature cycling test, which can be carried out as required. Line adjustment. According to the test content/sequence requirements, select a corresponding number of components from the selected components for testing. 6.3.3.1 Test procedure 6.3.3.2 Test items 6.3.3.2.1 Visual inspection Test according to IEC 61215-2 4.1 (MQT01). 6.3.3.2.2 Electroluminescence test Place the tested component in a dark room, connect the positive pole of the DC power supply to the positive pole of the photovoltaic component, and connect the negative pole to the negative pole to the photovoltaic group. The component enters the reverse current of the component short-circuit current, and the camera is used to take a picture of the component. See 6.4 for test requirements and judgments. 6.3.3.2.3 Stability test Test according to IEC 61215-2 4.19 (MQT19). 6.3.3.2.4 Insulation test Test according to IEC 61215-2 4.3 (MQT03). 6.3.3.2.5 Wet leakage current test Test according to IEC 61215-2 4.15 (MQT15). 6.3.3.2.6 Thermal cycle test Test according to IEC 61215-2 4.11 (MQT11). 6.3.3.2.7 Wet Freeze Test Test according to IEC 61215-2 4.12 (MQT12). 6.3.3.2.8 Damp heat test Test according to IEC 61215-2 4.12 (MQT12). 6.3.3.2.9 UV test a) Test according to IEC 61215-2 4.10 (MQT10); b) In this standard, there are various definitions of UV content, among which the ratio of UVA and UVB content in UV content should meet IEC 61215-2 requirements, other attributive terms applicable to this standard. --UV15.The irradiation measurement is not less than 15KWh; --UV30.The irradiation measurement is not less than 30KWh; --UV60.The irradiation measurement is not less than 60KWh. 6.3.3.2.10 Dynamic mechanical load test Test according to the requirements of IEC 62782. 6.3.3.2.11 PID test a) Test according to the requirements of IEC 62804; b) Test conditions are. temperature 85℃, humidity 85%, test voltage. the highest voltage of the system; c) The test time is set according to the test level. 6.3.3.2.12 Hot spot durability test a) Test according to IEC 61215-2 4.9 (MQT09); b) The test time is set according to the test level. 6.3.3.2.13 Thermal performance test of bypass diode a) Test according to IEC 61215-2 4.18.1 (MQT18.1); b) Different test conditions apply to different quality levels, see 6.3.4 for specific requirements. 6.3.4 Testing requirements 6.3.4.1 Quality class C (class C) 6.5 Photovoltaic module infrared thermal imaging test According to IEC 62446-3 "Photovoltaic (PV) System-Test and Commissioning, System Documentation and Performance Maintenance Requirements Part 3.Photovoltaic Modules and Power Stations The outdoor infrared thermal imaging of the ”is detected and the result is judged, the classification of the thermal abnormality is shown in Table 1.

7 Photovoltaic mounting system

7.1 Sampling inspection requirements Among the selected power generation units, three complete bracket systems are selected for testing, covering all types, models and manufacturers. 7.2 Material compliance check The materials and key components of the support system should meet the recommended standards in Table 2 or other equivalent standards. 7.3 Structural verification a) The size and position of the bracket opening as a fixing function should meet the equipment fixing requirements, and the connection point should ensure the grounding continuity; b) All accessible, protruding and corner parts of the support system should be handled safely; c) Without special installation instructions, brackets and fasteners cannot be used as part of component protection; d) Unless there are clear and necessary instructions in the installation book, the finalized bracket system cannot be changed. Such as assembly bolts on components, Punching or other actions that destroy the inherent structure of the component; e) Grounding bolts should be reserved for the support column; f) It is applicable to the support system in the earthquake zone, and the seismic check calculation should be carried out. 7.4 Check of carrying capacity a) Should meet the requirements of GB 50797; b) For threaded fasteners used in cross-sections, the load force ratio of the tightening surface load to the upward, downward and downward slope surface load force of the bracket system design shall be at least 3.1; c) When the perforated screw is used, the perforation load mu......
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