In recent years, with the concern of energy consumption and environmental protection, China's solar photovoltaic power generation industry shows a rapid development trend. It has gradually formed a situation of industrialization, scale, competition, and has played a certain positive role in the improvement of China's energy structure and the construction of a clean energy system. Since 2011, China has maintained a rapid growth in the annual installed photovoltaic capacity, and the newly installed capacity has ranked first in the world.
Overview of photovoltaic inverter industry development
Photovoltaic inverter is a power electronic equipment connecting solar photovoltaic panels and the power grid. Its main function is to convert the direct current generated by solar panels into alternating current that can be connected to the grid through the power module. It is one of the core equipment in the solar photovoltaic power generation system. The reliability and safety of photovoltaic inverter are directly related to the stability operation of the solar power generation system. Its conversion efficiency directly affects the power generation efficiency of the solar photovoltaic power generation system, and its service life is directly related to the service life of the photovoltaic power generation system.
With the rapid development of photovoltaic panel technology, the price of polycrystalline silicon drops rapidly, so that the cost of photovoltaic power generation gradually decreases and the capacity of photovoltaic power station becomes larger and larger. The reliability and stability requirements of photovoltaic power generation for inverters are gradually improved. Under the influence of such comprehensive factors, centralized inverters are bred.
The working principle of the centralized inverter is as follows:
the solar panel converts the solar energy into direct current, which flows to the centralized inverter through the box, and then converts the direct current into alternating current and finally merges into the power grid. With the rise of China and other emerging photovoltaic markets, the construction scale of large ground photovoltaic power stations increases rapidly, and centralized inverters are widely used. The output power of inverters is usually above 500KW.
In recent years, the requirements of photovoltaic power generation on power quality and power generation efficiency have been gradually improved. The application effect of centralized inverter in tracking the maximum power point is not good, and the series inverter and the distributed inverter have been gradually welcomed by the market. Compared with the centralized inverter, the series inverter has realized multi-channel MPPT scheme, and proved the power generation efficiency of the system. `Besides, the distributed photovoltaic inverter improves the MPPT control effect, realizes high-power power generation, improves the power generation efficiency when the construction cost is similar, and has a lower construction cost compared with the serial inverter solution.
The development trend of photovoltaic inverter
Reliability, conversion efficiency and cost are the core elements of inverter products. The future development direction of photovoltaic inverter will also focus on these three core elements, mainly towards the trend of high reliability, high conversion efficiency and low cost. At the same time, there are also some other factors to consider, such as the local conditions of the inverter, intelligent inverter, optical storage integration inverter, etc.
Although the National Development and Reform Commission adjusts the benchmark photovoltaic electricity price every year according to the cost changes, according to the requirements of the 13th five-year plan for electric power development (2016-2020), by 2020, the installed capacity of non-petrochemical energy power generation will reach about 770 million kilowatts, an increase of about 250 million kilowatts compared with 2015, accounting for 39%.
According to the requirements of the 13th five-year plan for solar energy development, by the end of 2020, the installed capacity of photovoltaic power generation will reach over 105 million kw, maintaining a stable development scale every year on the basis of the 12th five-year plan. Based on the national development plan, the photovoltaic power generation industry will maintain stable development in the future. At the same time, many countries around the world are also vigorously developing photovoltaic power generation. Accordingly, the market demand of the company's photovoltaic inverter products will maintain stable growth in the next few years.
The solar inverter data logger
can help us better monitor the work of photovoltaic inverter, protect and improve the life of solar inverter.