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technical transformation of photovoltaic power station

due to the technical level and other reasons, the early built photovoltaic power station gradually showed its performance defects after a period of operation. with the rapid development of photovoltaic industry, the improvement of photovoltaic system efficiency, the decline of system cost, and the rapid progress of technology, the technical transformation of photovoltaic power station arises spontaneously.

the technical transformation of photovoltaic power station is mainly through the deep integration of the internet of things, cloud computing, big data, artificial intelligence, new materials, new technologies and photovoltaic power generation industry to transform the power station with low performance indicators into a new intelligent photovoltaic power station. after the transformation, the power generation of the photovoltaic power station has been greatly increased, and the operating cost has been significantly reduced.

through analysis and calculation, it is found that the greater the decay of the old components, the higher the system efficiency, and the higher the grid price of the existing power plants, the better the benefits of technological transformation will be; at the same time, efficient modules with high cost performance ratio will bring better benefits.

at present, the technical transformation of the power station is mainly divided into benefit oriented technical transformation, production oriented technical transformation and safety oriented technical transformation. among them, the benefit oriented technical transformation includes the capacity increase and transformation of the power station, the replacement of old equipment, and the transformation of pid effect suppression device; production type technical transformation includes upgrading of agc/avc system, reactive power compensation and monitoring system; the technical improvement of safety includes the technical improvement of the safety protection of the power monitoring system, the transformation of corroded roof bridges, cable trays, lightning protection and grounding, safety signs, and non-standard ladder climbing.

noa has rich experience in photovoltaic projects, can carry out technical transformation and troubleshooting for photovoltaic systems, and provide professional technical support for photovoltaic system upgrading, so as to improve the performance of photovoltaic systems and solve photovoltaic system failures.

service content

the technical support provided by noa involves many aspects of the photovoltaic power station, which can provide the overall technical support of the power station, as well as technical transformation or troubleshooting of a single item.

one. service content

1. technical transformation of photovoltaic power station modules
2. photovoltaic power station bracket technology transformation
3. transformation of converter box technology
4. technical transformation of pv inverters
5. technical transformation of facilities in the substation room of the photovoltaic power station
6. technical transformation of pv power station cables
7. troubleshooting of pv power stations
8. technical transformation programme implementation

two. reference standard
1. iec62446-1:2016 amd1:2018 amendment 1 - photovoltaic (pv) systems - requirements for testing, documentation and maintenance - part 1: grid connected systems - documentation, commissioning tests and inspection
2. cnca/cts 0004-2009a technical specification of grid-connected pv inverter
3. cnca/cts 0016-2015 guideline of performance testing and quality assessment for grid-connected pv power plants
4. cnca/cts 0004-2010 basic accesptance requirements for grid-connected pv systems
5. gb/t 14549-1993 quality of electric energy supply harmonics in public supply network
6. gb/t 50796-2012 code for acceptance of photovoltaic power project
7. gb 50794-2012 code for construction of pv power station
8. gb 50797-2012 code for design of photovoltaic power station

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 zero in case of fire.

what are the factors that affect the overall technical transformation income of photovoltaic power plants?

(1) feed-in tariff of the project; (2) power reduction of old modules; (3) system efficiency of photovoltaic power station; (4) style of the new module.

what are the common failures of photovoltaic power station?

(1) module failure; (2) inverter fault; (3) box transformer failure; (4) 35kv single-phase grounding; (5) natural disasters; (6) high voltage cable terminal fault; (7) the combiner box is on fire.

what are the factors that affect the output power of photovoltaic power plants?

the solar radiation, tilt angle of battery modules, dust and shadow blocking, and temperature characteristics of modules cause the system power to be low due to improper system configuration and installation.

what are the common faults of the string inverter for external feedback?

it can be classified into six categories: pv voltage anomaly, power grid anomaly, insulation impedance anomaly, leakage current anomaly, communication anomaly and low output power. among them, the low output power does not belong to a fault, although it has a great impact on user income, which requires necessary analysis.

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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