Under the background of realizing the "dual carbon goal", it is expected that in the next five years, my country's annual new installed capacity of photovoltaics will reach 62 to 68GW, and the cumulative installed capacity of China's photovoltaic power plants will reach 561GW in 2025. In the process
With the advancement of battery technology and module packaging technology, the power of photovoltaic modules has become higher and higher, 400Wp+ modules are in the ascendant, and 500Wp modules have entered the market. The internal logic behind this is still the industry's pursuit of low cost of electricity (LCOE), which is used to compare the cost of photovoltaic power generation with other forms of power generation (especially thermal power), and determines the long-term profitability of a power station. High-power components can reduce the cost of BOS (system balancing components), which in turn promotes the decline of LCOE, and has a broad application space in the coming era of parity Internet access. Photovoltaic connector is a kind of auxiliary material of photovoltaic module, and it is the key component of DC side connection of power station. From the perspective of the connector, how do you view the impact of component power increase on power station owners?
1.3 Photovoltaic connector failure Photovoltaic connectors account for less than 0.5% of the initial investment cost of the system, but they are a key component of the photovoltaic system. It ensures that the power generated by the system can be stably transmitted from the components to the inverter and the user side. The EU Horizon 2020 "Solar Bankability" project team gave a list of TOP20 technical failures in the operation and maintenance of power stations based on the on-site operation and maintenance data of 746 power stations. "Burn" is ranked 2nd in the failure list. According to the international standard EN50521 for photovoltaic connectors, the contact resistance must be less than or equal to 5mΩ.
Photovoltaic connectors are one of the key components in the photovoltaic industry chain to achieve "turning light into electricity". They are used in all links of the photovoltaic industry chain, such as junction boxes, combiner boxes, inverters, and so on. With the development of the photovoltaic industry, the market volume of photovoltaic connectors is increasing day by day, but there are only a handful of domestic companies producing photovoltaic connectors. Facing the contradiction between the market demand for photovoltaic connectors and the supply of products, how should domestic connector companies seize the opportunity to innovate and develop? To this end, the reporter of "International Cable and Connection" interviewed Wenzhou Xinhui Photovoltaic Technology Co., Ltd.
2. Failure analysis of resistance Rcr The crimping resistance Rcr is mainly related to the crimping quality and the crimping process. We can judge the quality of crimping by the compression ratio and crimping profile. Good crimping requires a tight profile without gaps, and a regular appearance (re