This year's two sessions, for the first time, national energy security has risen to a strategic level as important as food security. Ensuring national energy security and promoting low-carbon transformation of the energy structure have become important topics of the two sessions.

Building a new power system with new energy as the main body is not only an important direction for the transformation and upgrading of my country's power system, but also a key way to achieve carbon peaking and carbon neutrality. Therefore, renewable energy represented by photovoltaics is ushering in a period of rapid development.

01 What are the key points for long-term operation of photovoltaic power plants?

The new situation of energy development has put forward higher expectations and requirements for the photovoltaic industry. How to ensure the long-term reliability and asset safety of photovoltaic power plants is an important proposition given to photovoltaic practitioners by the times.

In the outdoor operation of more than 25 years, photovoltaic power plants will inevitably face the impact and test of harsh weather environments such as strong winds, rainstorms, hail, heavy snow, etc., and all of these, only high-quality, high-quality, reliable and high-quality photovoltaics Only products can successfully "break through". Safety and reliability are the foundation and bottom line of the stable operation of photovoltaic power plants, and are also a necessary condition to ensure customer value and income. Sedum Environmental Technology believes that the stability and safety of the entire life cycle of photovoltaic power plants deserves great attention and attention from the entire industry.

Global photovoltaics will add about 100GW in 2018, and will reach more than 200GW by 2022. In the long run, the photovoltaic industry is expanding on a large scale, and the reliability and asset safety of photovoltaic power plants have become the top priorities for stabilizing the industry and helping to achieve the "dual carbon" goal as scheduled. The reliability of power plants should be studied from the perspective of energy security, and the safety margin of component design should be discussed from the perspective of cost per kilowatt hour.

02 Distributed photovoltaic projects will be the fastest growing field in the next decade

my country's photovoltaic power generation has ushered in a long-term good development opportunity period. It is preliminarily predicted that during the "14th Five-Year Plan" period, the increment of renewable energy will account for about 50% of the increment of primary energy consumption, and will become the main body of increment of energy consumption. At the same time, the proportion of distributed photovoltaics continues to increase, and the new industrial and commercial distributed photovoltaic installed capacity will account for 71% in the first quarter of 2022.

The main development points of distributed photovoltaic projects are mainly to build as many as possible, to optimize roofs with better conditions, to allow people to innovate business models, and to have clear property rights. The design points pay more attention to data evaluation, data verification, multi-party comparison of equipment plans, optimal ratio of project consumption, and comprehensive and accurate cost information, so as to further ensure reliable power generation performance.

03 Selection principle of photovoltaic power station

The main selection principle of photovoltaic power station is cost first and efficiency first. On the premise that the cost of components is not very different, the components with high conversion efficiency are given priority. If the high and low voltage of the components meet the project conditions, low-voltage products are preferred. The use of excellent components can ensure reliable power generation performance to a greater extent and ensure the reliability of the life cycle.

Photovoltaic power plants have large capacity, many types and quantities of power generation units, many fault points, heavy troubleshooting workload, fast technology update, short equipment replacement cycle, and higher and higher assessment standards for power plants by the power grid, all of which are the operation and maintenance of photovoltaic power plants. status quo.

The biggest risk affecting the reliability of photovoltaic power plants comes from components, including hot spots, cracks, battery attenuation, etc.; followed by DC combiner boxes, inverters, brackets, etc. The cost of components accounts for about 60% of the total investment in the power station. If a component fails, it cannot be repaired, it can only be replaced, and the loss is very large.

An excellent module has a crucial impact on the reliability of photovoltaic power plants, and the application of modules is also a process that must withstand the test of harsh environments and various force majeure factors.

All-factor management in the whole process, reducing defects in each link, strengthening quality control in the construction stage, actively improving the quality and efficiency of power plants, and actively carrying out technological innovation are all important ways to improve photovoltaic reliability.

04 How can the quality of Sedum Guangyao series component products be guaranteed?

By fully guaranteeing the technological leadership and quality reliability of module products, Sedum Environmental Technology ensures the maximization of power plant revenue, provides long-term value for photovoltaic power plants in all scenarios, and facilitates energy transformation and the development of new power systems.

Sedum Environmental Technology believes that future technological innovation should return to the main channel of efficiency improvement, and efficiency improvement can save BOS costs without changing the design boundary conditions, which is the eternal theme of photovoltaic technology development.

The risk of natural factors is the biggest obstacle to the stability of photovoltaic power plants. The reliability of photovoltaic power plants should be improved from the aspects of accurate assessment of local meteorological and geological conditions in the early stage of design, multi-dimensional component selection, design and reliability assessment. sex.

In the development process of photovoltaic power plants, environmental risk is the biggest obstacle to the stability of photovoltaic power plants. The local meteorological and geological conditions should be accurately evaluated in the early stage of design, and the reliability of power plants should be improved through necessary measures such as component selection and power station design. Mainstream mature products should be selected for the component selection of large centralized power stations. Therefore, the industry should form a unified component size standard as soon as possible.

05 Technological innovation brings industry progress, but also brings the take-off of enterprises

The supply chain quality assurance service found that component design, component design, reliability assessment, production process, packaging and transportation, system design, and operation and maintenance will have an impact on the new version of components.

High currents put more pressure on component reliability and performance. We need to identify the risks of design and development, manufacturing, transportation and installation, equipment operation and maintenance one by one. Larger components bring greater voltage and current. If the components are partially blocked by shades, frames, or the back side of the junction box, the safety risk caused by hot spots will be magnified.

Technological innovation drives inverter innovation, injects innovative vitality into the photovoltaic market, promotes the development of the photovoltaic industry, and better interprets the value demands of maximizing customer value.

Photovoltaic power plants should put reliability and asset safety first, and photovoltaic products and technologies should take the cost of electricity as the final evaluation standard, and comprehensively consider cost, power generation and reliability.