The solar grid-connected power generation system converts the solar energy into electrical energy and directly feeds the electrical energy into the grid through the grid-connected inverter without storing energy in the battery. The solar grid-connected power generation system represents the development direction of solar power generation and is an attractive energy utilization technology in the 21st century.
Advantages and disadvantages of solar grid-connected power generation system
(1) Use clean and renewable natural energy, solar power generation, no consumption of non-renewable energy with limited resources, no greenhouse gas and pollutant emissions in use, in harmony with the ecological environment, and in line with the strategy of sustainable economic and social development.
(2) The generated energy is fed into the power grid, and the power grid is used as an energy storage device, eliminating the need for batteries, which can reduce the construction investment by 35%-45% compared with the independent solar photovoltaic system, and greatly reduce the cost of power generation. Omitting the battery can avoid secondary pollution of the battery and increase the mean time between failures of the system.
(3) The perfect combination of photovoltaic modules and buildings can not only generate electricity, but also can be used as building materials and decorative materials, so that material resources can be fully utilized, and various functions can be exerted, which not only helps to reduce construction costs, but also improves the technology of buildings. content, increase the "selling point".
(4) Distributed construction, nearby decentralized power supply, and flexible access to and out of the power grid will not only help strengthen the power system’s ability to resist wars and disasters, but also help improve the power system’s load balance and reduce line losses.
(5) It can play the role of peak regulation. The networked solar photovoltaic system is the hot spot and focus of the developed countries in the field of photovoltaic application, and is the mainstream development trend of the world's solar photovoltaic power generation, with a huge market and broad prospects.
1. Ground applications are intermittent and random, power generation is related to climatic conditions, and it is impossible or rarely to generate power at night or in rainy days;
2. Low energy density. Under standard conditions, the solar radiation intensity received by the ground is 1000 W/m 2. When using large specifications, it needs to occupy a large area;
3. The price is still relatively expensive, 3 to 15 times that of conventional power generation, and the initial investment is high.