Photovoltaic power generation device quality appraisal

Photovoltaic power generation refers to a power generation method that uses solar photovoltaic cells to directly convert solar radiation energy into electrical energy. Photovoltaic power generation is the mainstream of solar power generation today.
The basic principle of photovoltaic power generation is the phenomenon that light causes potential differences between different parts of uneven semiconductors or semiconductors and metals. It is first the process of converting photons (light waves) into electrons and light energy into electrical energy; secondly, it is the process of forming voltage. Photovoltaic power generation devices include photovoltaic cells, brackets, inverters, collector lines and other facilities.
In the case of photovoltaic power generation device quality appraisal, Zhongke Testing can provide photovoltaic power generation device quality appraisal services.

photovoltaic power generation system can be divided into five types: photovoltaic grid-connected system, photovoltaic grid-connected energy storage system, photovoltaic off-grid energy storage system, off-grid energy storage system and photovoltaic storage micro-grid system.

NB/T 10635-2021 Technical Supervision Regulations for Photovoltaic Modules of Photovoltaic Power Stations
NB/T 10589-2021 Guidelines for Production Preparation of Photovoltaic Power Stations
GB/T 35694-2017 Safety Regulations for Photovoltaic Power Stations
GB/T 38335-2019 Photovoltaic power station operation regulations
GB/T 32512-2016 Photovoltaic power station lightning protection technical requirements
NB/T 10642-2021 Photovoltaic power station bracket technical requirements
NB/T 32034-2016 Photovoltaic power station on-site component inspection regulations
GB/T 39854-2021 Technical specifications for performance evaluation of photovoltaic power stations
GB/T 32900-2016 Technical specifications for relay protection of photovoltaic power stations

A certain photovoltaic power station frequently experienced tripping problems after it was installed and connected to the grid. After a year of maintenance, it still could not be solved. In the end, the tripping device was removed, and a fire accident even occurred.
was entrusted by the court to conduct an appraisal of the cause of the burning of the terminal posts of the thin-film power generation system of the photovoltaic power generation device involved and whether the generated power met the contract requirements.
appraisal analysis results: The
appraisal analysis expert group discussed the relevant information and on-site investigation of the PVC materials involved in the case and conducted a comprehensive quality and technical analysis, and made the following suggestions and conclusions:
A photovoltaic connector at the inverter of the photovoltaic power generation device involved in the case was burned and fell off. The most severely burned part was at the metal contact of the inner core of the male and female connectors. When power is on, due to poor contact between the inner core metal contacts of the connector's male and female connectors, the contact resistance increases, and then the temperature rise increases. When the temperature range exceeds the temperature range that the plastic shell can withstand, the connector fails, and the connector is burned out and damaged.
The photovoltaic power generation device involved in the case and the thin-film power generation system terminals were burned due to poor connector contact, and the actual power generation of the power station was close to the theoretical power generation.