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grid connection acceptance of photovoltaic power station

at present, renewable energy utilization technologies such as photovoltaic, wind power, hydrogen energy, biomass and nuclear power have made great progress and formed a certain scale throughout the country. the development and utilization of renewable energy provide new development opportunities for thousands of enterprises, but also bring huge transformation challenges. the grid connection performance acceptance of photovoltaic power station is the first examination of the overall operation performance of the power station after the grid connection of photovoltaic power station. the purpose of acceptance is to verify whether the construction quality of photovoltaic power station and the performance of key components meet the requirements of relevant standards; make forward rectification suggestions for the problems found in the acceptance process, and provide professional technical consulting services and subsequent re-inspection work to the power station investor, so as to truly eliminate potential dangers and ensure the quality of the power station; the purpose of acceptance is to ensure the quality of the power station, ensure the power generation and service life after the operation of the power station, reduce the risk of power station investment, and ensure the stable income of the photovoltaic power station.

noa, as a fair and authoritative third-party service agency in the industry with multiple internal and external approvals, has advanced power station testing equipment and a professional technical service team. so far, it has provided nearly 10gw of inspection and testing services for the new energy industry, serving more than 500 customers. based on gb/t 50796, gb/t 2828, cnca/cts 0004, cnca/cts 0016, iec 62446 and other standards, and in accordance with the contract, technical specifications, relevant standards for key equipment, sampling standards and other requirements of relevant parties of photovoltaic power stations, provide photovoltaic power station grid connection acceptance services for large-scale ground centralized photovoltaic power stations, distributed photovoltaic power stations, poverty relief photovoltaic power stations of provincial poverty relief offices and local governments, and issue an accurate third-party acceptance report.

service content

one. contents of photovoltaic power station grid connection acceptance service provided by noa

1. review of basic project information

power station capacity verification, document review in the early stage of power station project, power station construction stage and power station operation and maintenance stage.

2. equipment quality and construction quality

visual inspection of power plant modules, inspection of cables, combiner boxes, inverters, transformers, primary equipment, secondary equipment and other electrical equipment.

3. system performance and safety inspection

el test of photovoltaic modules in the power station, efficiency test of photovoltaic system, infrared test of photovoltaic modules, module and string iv test, working current test of photovoltaic strings in the combiner box, working voltage test of photovoltaic strings in the combiner box, grounding continuity test, insulation resistance test, inverter conversion efficiency test, inverter power quality test, grounding lightning protection system test, dust shielding loss analysis, photovoltaic array loss analysis pv ac/dc line loss analysis, etc.

two. reference standard

○  gb/t 50796-2012 code for acceptance of photovoltaic power project
○  gb 50797-2012 code for design of photovoltaic power station
○  gb 50794-2012 code for construction of pv power station
○  iec 62446-1:2016 amd1:2018 amendment 1 - photovoltaic (pv) systems - requirements for testing, documentation and maintenance - part 1: grid connected systems - documentation, commissioning tests and inspection
○  cnca/cts 0004-2010 basic acceptance requirements for grid-connected pv systems
○  cnca/cts 0016-2015 guideline of performance testing and quality assessment for grid-connected pv power plants
○  cqc 9102-2012  technical requirements for evaluation of photovoltaic power generation system
○  cnca/cts 0004-2009a technical specification of grid-connected pv inverter
○  gb/t 20513-2006 photovoltaic system performance monitoring guidelines for measurement, data exchange and analysis

service process

q&a

the photovoltaic power station system is composed of photovoltaic modules, inverters, combiner boxes, brackets and other components. problems in one link will affect the operation of the power station, ranging from loss of power generation to massive fire.

why does the glass surface of module burst?

unreasonable positions of deformed brackets and support blocks are easy to cause stress on the surface of modules, resulting in module burst.

what is the influence caused by the impact on the mudle surface and the bursting of the module glass surface?

carelessness or man-made damage could be happen during construction. affect the light transmittance of modules; water vapor is easy to penetrate into the module through cracks and cause short circuit. it is recommended to replace the defect modules in time, strengthen the construction management and the tracking of the operation and maintenance of the power station.

what influence will bird droppings and other sundries on the glass surface of the module have on the module?

it is easy to cause the local temperature of the module to be too high, forming hot spots for a long time, and reducing the power generation efficiency of the module. please also timely clean up the sundries on the surface of the components and reasonably arrange the maintenance time.

what influence will scratches on the glass surface of the module have on the module?

it is generally caused during the handling or installation of the module. scratches result in poor local light transmittance of the module. long term hot spots are easy to cause battery failure. it is recommended to track the operation of modules for a long time and deal with potential problems in a timely manner.

our advantage

authoritative qualification

noa has been approved by certification and accreditation administration of the people’s republic of china（cnca）(cnca-r-2002-051), and has obtained qualification of china inspection body and laboratory mandatory approval (cma),and has passed the multiple approvals of china national accreditation service for conformity assessment (cnas), international accreditation service (ias), united kingdom accreditation service (ukas), joint accreditation system of australia and new zealand (jas-anz). noa has been approved by state administration for market regulation of china, and has been recognized as inspection and testing institution of china's special equipment, as well as the qualification of china's national equipment supervision and engineering supervision. noa-dci is the notified body of the ce directive of the european commission. noa has been recognized by the international electrotechnical commission (iecq) by obtaining electronic component quality assessment system. it is also a national inspection and assessment notified body of import and export commodity in china.noa is a high-tech enterprise in shanghai.

improve performance, realize asset value appreciation, and service throughout the entire value chain

from pre-design to post-operation, noa has the ability to guarantee the whole life cycle of the business. noa, as an independent third-party inspection company, has a large number of domestic and international standards and specifications proficient in design, welding, non-destructive testing, painting, packaging and other fields the experienced team of professional engineers and inspection experts, with more than ten years of experience in the domestic market, is familiar with all aspects of the domestic industrial equipment supply chain, and can provide you with technical support services for the full life cycle of technical services in a timely manner, combining various products. inspection, certification, testing, consulting, and auditing services can provide you with one-stop all-round comprehensive services.

quality, efficiency and service

noa has formed a mature and solid operation system in the development of more than 20 years. we let technical experts who are familiar with market regulations and testing standards and have professional industry experience to carry out inspection, evaluation and design review work. while meeting the requirements of domestic and international standards, we ensure that customers can obtain satisfactory service results in the first time with accurate time-sensitive management methods, and ensure that customers can seize the opportunity in the market competition.

service area

noa inspection services currently cover europe, australia, russia, some middle east regions and most regions in china. noa can ensure the consistency and continuity of customer service in different regions, and eliminate the impact of unfamiliar environments on customer quality. the guarantees and the impact of project implementation enable customers to participate in different markets across the country or around the world with flawless quality.

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