On-site acceptance refers to checking the quality before acceptance when the photovoltaic equipment reaches the location designated by the customer. On-site acceptance is to comprehensively assess the quality of the equipment and clarify the responsibilities of all parties. At the same time, it helps investors and owners to strengthen the quality control of power plants and reduce the failure rate in the later period.

Brackets, photovoltaic modules, combiner boxes and inverters are key equipment for photovoltaic power plants. The quality differences will directly affect the operation of the power plants. Huayang Testing provides on-site acceptance services for power plants owners, EPCs, construction companies, manufacturers, etc. based on IEC and GB photovoltaic standards and technical agreement on equipment procurement.

Service scope: 

Brackets inspection
◆ Quantity, specification, model and size.
◆ whether the thickness and opening position of material are consistent with the drawings.
◆ Whether the surface anti-corrosion treatment meets the requirements.

Modules on-site inspection
◆ Outer packaging, quantity, specification and model inspection.
◆ Modules visual inspection.
◆ Modules raw material characteristic test.
◆ Modules power characteristic test.
◆ Modules EL characteristic test.
◆ Other specific entrusted projects.

Combiner boxes and inverters inspection
◆ Quantity and specification model inspection.
◆ Whether the label content meets the technical requirements.
◆ Whether the connection point and polarity of the load are indicated.
◆ Whether the appearance and main parts are damaged or damp.
◆ Whether the components are loose or missing.
◆ Visual inspection of inverter (combination box).

Standard：
◆IEC 62446-1:2016《Photovoltaic (PV) systems – Requirements for testing, documentation and maintenance–Part1:Grid connected system – Documentation, commissioning tests and inspection》
◆IEC 61215-1:2016《Terrestrial photovoltaic (PV) modules – Design qualification and type approval – Part 1: Test requirements》
◆GB/T 6495.1-1996《Photovoltaic devices Part 1: Measurement of photovoltaic current-voltage characterisitics》
◆GB/T 6495.4-1996《Procedures for temperature and irradiance corrections to measured I-V characteristics of crystalline silicon photovoltaic devices》
◆GB/T 6040-2002《General rules for infrared analysis》
◆GB/T 13912-2002《Metallic coatings - Hot dip galvanized coatings on fabricated iron and steel articles – Specification and test methods》

Power technical supervision is to monitor and manage the power generation equipment, power supply equipment and operation status in the power system. At the same time, master their operating performance and changes, and then feedback to the production, design and manufacturing departments to improve product quality.

Annual technical supervision of the key equipment for power plants is required in order to objectively and scientifically verify whether the photovoltaic power plant meets the international, national and industry related photovoltaic power generation technical standards. Further improve the operation safety and reliability of photovoltaic power generation equipment and prevent the occurrence of major accidents.

Service scope:
◆ Technical supervision of photovoltaic modules.
◆ Inverter technical supervision.
◆ Insulation supervision.
◆ Power quality supervision
◆ Energy saving supervision
◆ Metal supervision
◆ Chemical supervision
◆ Relay protection supervision
◆ Electric measurement supervision, etc.

Standard：
◆DL/T 1051-2007《Guide for technology supervision in electrical power system》
◆DL/T 1054-2007《Technology supervision code for the insulation of high voltage electric equipment》
◆GB 50794-2012《Code for construction of PV power station》
◆GB 50797-2012《Code for design of photovoltaic power station》
◆NB/T 32004-2013《Technical specification of grid-connected PV inverter》
◆NB/T 32006-2013《Test code for power quality of photovoltaic power station》

The technical due diligence on photovoltaic power plants refers to a series of investigations on the equipment quality, construction quality, power generation performance and potential risks of the target power plant during the acquisition and financing process. It is one of the most important links in the process of acquisition and merger, and also an important risk prevention tool in the process of acquisition and operation. In the process of investigation, professional experience and expert resources are usually used to form independent opinions, which are used to evaluate the merits and demerits of M & A as decision support for management. From the buyer's perspective, due diligence is also risk management. Due diligence must be completed by a professional third-party organization.

At present, the technical due diligence on power plant has covered all aspects of project information verification, preliminary design evaluation, performance evaluation, quality assessment of key power generation equipment, quality assessment of power generation unit project, technical contract review, operation and maintenance evaluation, etc.

Service scope:
◆ Data integrity check of photovoltaic power station
◆ Preliminary design evaluation
◆ Power plant capacity check
◆ Power generation capacity estimation
◆ Key equipment contract compliance assessment
◆ Quality assessment of key power generation equipment
◆ Project quality evaluation of power generation unit
◆ On-site inspection of performance of key components
◆ System efficiency evaluation
◆ Statistical assessment of major defects in photovoltaic power plants

Standard:
◆IEC 62446-1:2016《Photovoltaic (PV) systems – Requirements for testing, documentation and maintenance–Part1:Grid connected system – Documentation, commissioning tests and inspection》
◆IEC 61215-1:2016《Terrestrial photovoltaic (PV) modules – Design qualification and type approval – Part 1: Test requirements》
◆IEC 61730-2:2016《Photovoltaic (PV) module safety qualification – Part 2: Requirements for testing》
◆GB 50794 《Code for construction of PV power station》
◆GB/T 50796-2012 《Code for acceptance of photovoltaic power project》
◆GB/T 19964-2012《Technical requirement for connecting photovoltaic power station to power system》
◆NB/T 32004-2013 《Technical specification of grid-connected PV inverter》
◆NB/T 32006-2013 《Test code for power quality of photovoltaic power station》
◆CNCA/CTS 0016-2015 《Guideline of Performance Testing and Quality Assessment for Grid-connected PV Power Plants》

Photovoltaic poverty alleviation is an effective poverty alleviation mode of targeted poverty alleviation, which is listed as one of the top ten projects of targeted poverty alleviation. It has started the transformation of poverty alleviation and development from "blood transfusion poverty alleviation" to "precision poverty alleviation". With one-time investment and long-term benefits, it can be popularized and applied to poor areas in China. It will become an important poverty alleviation measure to realize that all poor areas and the poor population will step into an overall well-off society by 2020.

Service scope:
◆ Check the qualification of construction, supervision and related organizations.
◆ Control the quality of key equipment on site during construction.
◆ Examine the construction quality of key projects such as electrical, civil engineering, installation and concealed projects.
◆ The inspection and acceptance of the safety and power generation performance of the power station are completed after the project is finished and grid-connected.
◆ A comprehensive evaluation of the power generation performance, operation and maintenance quality and poverty alleviation effect of the power station will be conducted after the acceptance of the power station.

Standard:
◆GB/T 36115-2018《Targeted poverty alleviation-Technical guide of village photovoltaic power station》
◆GB/T 36119-2018《Targeted poverty alleviation-Management and evaluation guide of village photovoltaic power station》
◆GB/T 50796-2012 《Code for acceptance of photovoltaic power project》
◆NB/T 32004-2013 《Technical specification of grid-connected PV inverter》
◆NB/T 32006-2013 《Test code for power quality of photovoltaic power station》
◆CNCA/CTS 0016-2015 《Guideline of Performance Testing and Quality Assessment for Grid-connected PV Power Plants》

After a period of operation of the photovoltaic power plant, the problems existing in the construction stage will be gradually exposed. The non-standard design and installation of power plant, low equipment and system efficiency will also cause loss of power generation. Technical reconstruction is the most effective way to improve the power generation efficiency of the power plant. At present, the technical reconstruction of power plant is mainly divided into three aspects: benefit-oriented, production-oriented and safety-oriented.

Service value:
◆ Improve equipment efficiency and power generation capacity.
◆ Improve equipment safety and optimize production environment.
◆ Improve the ability to deal with equipment failures.
◆ Reduce the cost of operation and maintenance, and improve the overall profitability of the power plant.

Huayang Testing pioneered the "Testing cloud" platform of the photovoltaic industry, using a new architecture of "testing + Internet + big data + artificial intelligence". A large number of test data and common problems in the process of testing and evaluation have been stored in the "testing cloud" platform over the years, and a large number of technical transformation experience cases have been accumulated. Multi-dimensional analysis through "AI + artificial" provides strong technical support for photovoltaic power plant fault finding, problem analysis, and technical reconstruction.

In order to promote the healthy development of photovoltaic industry, reasonably evaluate the quality of grid connected photovoltaic power generation system, and provide the basis for equity financing, property rights transaction and quality guarantee of photovoltaic power plants, our company has formulated the "code for comprehensive evaluation of grid connected photovoltaic power stations" based on a large number of investigations and field tests of domestic large-scale photovoltaic power plants. The sampling plan, data revision, on-site inspection, performance monitoring, quality assessment, test methods, and scoring principles of grid-connected photovoltaic power plants are all stipulated. The implementation of the specification will achieve an objective assessment of the comprehensive performance of photovoltaic power plants, and quantitative test data can be given for each quality and efficiency point of photovoltaic power plants. And then, it provides technical support for the subsequent improvement of the quality of photovoltaic power plants, and provides a basis for large-scale power plant transactions, quality guarantees, and financing.

Assessent eleents:
◆ Project Information
◆ Equipment quality
◆ Construction quality
◆ System performance
◆ Operation and maintenance quality

Standard:
◆IEC 62446-1:2016《Photovoltaic (PV) systems – Requirements for testing, documentation and maintenance–Part1:Grid connected system – Documentation, commissioning tests and inspection》
◆IEC 61215-1:2016《Terrestrial photovoltaic (PV) modules – Design qualification and type approval – Part 1: Test requirements》
◆IEC 61730-2:2016《Photovoltaic (PV) module safety qualification – Part 2: Requirements for testing》
◆GB 50794 《Code for construction of PV power station》
◆GB/T 50796-2012 《Code for acceptance of photovoltaic power project》
◆GB/T 19964-2012《Technical requirement for connecting photovoltaic power station to power system》
◆NB/T 32004-2013 《Technical specification of grid-connected PV inverter》
◆NB/T 32006-2013 《Test code for power quality of photovoltaic power station》
◆CNCA/CTS 0016-2015 《Guideline of Performance Testing and Quality Assessment for Grid-connected PV Power Plants》