Off-grid wind and solar complementary power supply new energy model system

In today's China, the severity of the energy situation is well known. The serious environmental pollution caused by energy shortages and inefficient energy is related to national economy and people's livelihood. Complying with the international trend of energy conservation and emission reduction, our government has promised the world that by 2020, the carbon dioxide emissions per unit of GDP will fall by 40% to 50% compared to 2005, and the proportion of non-petrochemical energy in primary energy consumption will reach 15%, which means that each year new energy, Renewable energy consumption increased by 1%.

Therefore, how to vigorously develop and use new energy has become the key to the overall situation. Wind energy and solar energy are undoubtedly international options for new energy. However, in terms of the use of wind energy solar energy, the national policy guide only emphasizes the manufacturing of related parts in its industry, and in terms of application, it mainly focuses on the development of large-scale wind power and large-scale photovoltaic power plants. The national concession approval system also makes the construction of most wind power stations and photovoltaic power stations dominated by a very small number of state-owned large-scale power generation groups. The industry lacks effective competition and the development dynamism has not been truly demonstrated. Many unfavorable factors have made the wind energy solar energy industry in China present an embarrassing situation in which the surface is flourishing and the actual application scale is small and inefficient.

Faced with the difficulties of developing large-scale wind power and photovoltaic power plants, how to adopt new ideas, open up new technological approaches, and maximize the use of wind energy solar energy resources are the core topics for the development of new energy industries. While vigorously promoting the integrated application of wind energy solar miniaturization, it is hopeful that it will become a new growth pole for new energy development.

The integrated application of wind energy solar miniaturization is a comprehensive application of distributed generation and photovoltaic distributed generation of small and medium-sized wind turbines. The system integrates wind power and photovoltaic power generation, and forms an independent renewable power supply system through intelligent control and other technologies. At present, the wind-solar hybrid off-grid energy storage and power supply system is an outstanding representative of this concept. Compared with the traditional disadvantages of miniaturized wind power generation or solar power generation, the system has solved the problems of using wind power alone or solar power generation by season and weather. Constraints cause the wind and light to form strong complementarity between day and night changes and seasonal changes, and improve the stability of the power supply system.

Taking wind energy as an example, wind energy resources in China are unevenly distributed and there are many low wind speed zones. Conventional wind turbines are useless under low wind speeds, and the latest "full-magnet permanent magnet suspension wind turbines" technology wind and solar hybrid systems can be used. The realization of "light wind start, breeze power generation", power generation output power is also significantly higher than the traditional wind turbine 20%, 80% of China's wind energy resources in low wind speed areas will undoubtedly be effectively used and developed. In addition, solar energy and wind energy have strong complementarity in time and area, making wind power complementary off-grid power generation systems have the best matching in resource distribution and that is the best independent power system with the best resource conditions.

Industry sources pointed out that the wind and solar power grids are complementary to the off-grid power supply system for the effective use of resources, and do not produce pollution, the application is also very wide, the market is huge, and it is entirely possible to go hand in hand with large-scale grid-connected wind power and photovoltaic power plants, becoming a new energy field The important growth pole.

Take the urban street lamp new construction project as an example. Although the wind and solar hybrid street lights have higher balances than the traditional street lamps in terms of initial investment, the cost of subsequent use and maintenance will be greatly reduced, and the overall economic benefits have obvious advantages. Compared with the advantages of unit benefits, the overall scale is undoubtedly more persuasive: In 2010, the national road lamp power consumption accounted for about 4% to 5% of the country's total electricity generation, which is equivalent to the annual power generation of the Three Gorges! In 2011, the total amount of wind power in the country was double. If we can realize the transformation of new energy sources for street lamps throughout the country and realize zero power consumption across the entire network, it is equivalent to building a new Three Gorges hydropower station each year.