The global concern over the security of energy supply and the actions taken to deal with climate change have promoted the rapid development of renewable energy technologies and industries worldwide, such as photovoltaic power generation and wind power generation, with an annual growth rate of more than 20 percent. Renewable energy has become an important alternative energy to achieve energy diversification, cope with global climate change and achieve sustainable development. Especially in the past two years, with the sharp fluctuations of international oil prices and the implementation of the Kyoto Protocol, the development of renewable energy has become a hot spot in the field of international energy, and has been widely concerned by many countries in the world. By the end of 2006, the installed capacity of renewable energy in the world had exceeded 200 million kW, including 80 million kW of small hydropower, 75,000 kW of wind power, 10 million kW of geothermal power, and more than 7 million kW of solar power. The annual growth rate of solar photovoltaic power exceeded 60%, with a production capacity of nearly 2 million kW.
Energy saving advantages of solar lighting
With the development of economy, lighting power will be greatly improved in our country, the research and application of green energy-saving lighting will be paid more and more attention. As a cold light source product, solar LED lighting has the characteristics of high cost performance, green environmental protection, safe and reliable, stable quality, long service life, easy installation and maintenance, etc. It can be widely used in green space lighting, highway lighting, advertising light box lighting, urban landscape lighting and home lighting system. However, the high one-time investment of solar LED lighting is the bottleneck of its development.
At present, lighting consumption accounts for about 20% of the total electricity consumption, reducing lighting electricity consumption is an important way to save energy. In order to achieve this goal, the industry has researched and developed a variety of energy-saving lighting appliances, and achieved certain results. However, the distance from the 'green lighting' requirements are still far away, the development and application of more efficient, reliable, safe, durable new light source is imperative.
By the end of 2006, China's renewable energy utilization totaled 200 million tons of standard coal (excluding conventional biomass energy use), accounting for about 0.5 percentage points, a solid step toward the goal of 10% of the country's total primary energy consumption by 2010. At present, our country is promoting the domestic market development of photovoltaic power generation from the following aspects: first, start power transmission to village project; 2. Use photovoltaic power generation in special projects, such as World Expo and Olympic Games; 3. Build photovoltaic power stations in desert areas; 4. Mobilize some cities to launch rooftop programs; 5. Study and formulate price policies to improve the competitiveness of photovoltaic power generation (90% export of photovoltaic products and the absence of a domestic market may limit the long-term development of China's photovoltaic industry. If the foreign PV industry policy changes or import restrictions are adopted to protect the domestic industry, China's large number of PV projects in recent years will face difficulties).
Technical innovation of solar lighting
LED with low power consumption, extraordinary service life is widely used in signal indication, digital display and other weak current fields. However, due to the small opening Angle of traditional LED light source, high brightness of point area, strong directional light scattering, light source easy to form light spot, poor light uniformity and other factors, its application in the lighting field is restricted.