At present, photovoltaic products cannot be opened in the Chinese market. The main reason is that my country's power grid has limited acceptance of new energy sources such as solar and wind power. To solve this problem, my country urgently needs to develop a strong smart grid.
The strong smart grid is based on the UHV grid as the backbone grid and the coordinated development of all levels of grids. It is supported by the communication and information platform. It has the characteristics of informatization, automation, and interaction, including the power generation, transmission, and All links of power transformation, distribution, power consumption and dispatch cover all voltage levels, realizing a highly integrated modern power grid of “power flow, information flow, and business flow”.
Most of the new energy gathering places such as wind and solar energy in China are located in the western and northern regions, and more than 75% of energy demand is concentrated in the eastern and central regions. In recent years, China has adopted conventional power station construction and management methods and adopted concession bidding methods to build large-scale Photovoltaic power plants and wind power plants. Regardless of wind power generation, photovoltaic, solar thermal and other new energy generation factors such as “instability of power generation load” and “large transmission loss” have brought problems to the grid.
The basic national conditions of the unbalanced distribution of energy resources and energy demand require my country to implement optimized allocation of energy resources across the country. A strong smart grid can provide a good platform for the optimal allocation of new energy resources. New energy generation such as solar and wind energy can be connected to the grid in time, and the connection process can be controlled by itself. Through efficient transmission, the stability and utilization of new energy can be greatly improved. rate. Through the construction of a strong smart grid, the formation of a strong receiving-end and sending-end power grid will significantly improve the grid's ability to access, absorb and regulate new energy such as solar and wind energy, and vigorously promote the development of new energy. Through the construction of a strong and smart grid, a UHV transmission network with “strong communication and strong directivity” is formed. Through the cross-regional, long-distance, large-capacity, low-loss and high-efficiency transmission of new energy, the rich new energy in the west can be transported to energy demand The eastern region with a large amount has significantly improved the power grid's ability to optimize the allocation of large-scale energy resources. According to data from the State Grid Corporation of China, a loop of UHV DC grid can send 6 million kilowatts of electricity, which is equivalent to 5-6 times the existing 500-kV DC grid, and the transmission distance is also 2 to 3 times the latter. Therefore, in theory, if UHV transmission and transformation is adopted, the problem of “large transmission loss” of new energy power generation will be alleviated. On this basis, if the smart grid is used to deploy between “new energy power generation” and “traditional energy power generation” （when wind and light are insufficient, the grid mainly transmits and distributes traditional energy power generation, and vice versa when wind and light are sufficient）, then , The instability of new energy power generation will also be effectively compensated.
The development of a strong smart grid can provide a broad domestic market for my country's new energy power generation equipment manufacturers and reduce their dependence on the international market. At the same time, our country can truly enjoy the benefits of clean energy. Taking photovoltaic power generation as an example, the photovoltaic power generation industry is indeed a clean energy industry, while the photovoltaic power generation equipment manufacturing industry is a completely high energy-consuming industry. Before my country exported a large number of power generation equipment, to a certain extent, it is a cheap export of my country's energy. The development of a strong smart grid will effectively improve my country's energy consumption structure, reduce transmission loss rates, improve grid operation economy, and increase power efficiency.
Therefore, in the current period of economic structural transformation, my country should expand investment in the field of smart grids, and by promoting the construction of smart grids, provide a broad domestic market for my country's new energy equipment companies, improve my country's energy structure, and promote energy conservation and emission reduction.