![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
With the rapid growth of China's renewable energy power generation, the drawbacks of the traditional power grid are increasingly apparent, and the urgency and importance of China's smart grid construction is further enhanced. Experts believe that China should do a good job in distributed energy construction and energy storage technology research and development, and vigorously promote the construction of smart grids to solve the problem of grid connection of renewable energy. While strengthening the breakthrough in research and development of free technology, we will actively use international resources, learn from advanced experience, deepen international cooperation, and jointly promote the construction of smart grids in China. Renewable energy is connected to the grid and needs smart grid construction to speed up the smart grid. It is also known as the power grid “highway†and is one of the most advanced new energy industries in the world. With the rapid growth of China's renewable energy generation, this poses a challenge to the traditional power grid, and China's smart grid construction needs to accelerate. The director of the Institute of Superconductivity, China Electric Power Research Institute, came to Shanghai to participate in the 4th China Smart Grid Conference. He said that renewable energy generation, such as wind power and solar power, is highly volatile, and China's existing power grid facilities are used. The rate is low and the ability to regulate peak-to-valley differences is weak. With the increasing power generation of renewable energy, China's power grid construction can no longer continue to take the old road. Therefore, China should strengthen the construction of smart grid to cope with the grid connection of large-scale renewable energy power generation. To Xiaokang, taking wind power as an example, China's wind power installed capacity has been ranked first in the world. The concentrated development of large-scale wind power has put pressure on the load of the existing power grid. In recent years, de-networking accidents have occurred in many areas, and relevant departments have to adopt measures to “limit winds†and “discard windsâ€. The data released by the National Energy Administration proves that the problem of wind curtailment in some areas of China is becoming more and more serious. In 2011, the total amount of wind power curtailment in the country exceeded 10 billion kWh, and the average utilization hours decreased significantly. The utilization hours of individual provinces (districts) have dropped to about 1600 hours, seriously affecting the economics of wind farm operation. Wind power grid-connected operation and consumption has become an important factor restricting the sustainable and healthy development of wind power in China. Wang Sicheng, a researcher at the Energy Research Institute of the National Development and Reform Commission, said: "The problem of grid connection has become a bottleneck for the development of new energy. It is necessary to come up with practical and feasible policies. Don't wait for the surplus in all areas to worry." It is understood that in addition to wind power, solar power generation There are also problems with grid connection. Recently, the National Energy Administration issued the "Twelfth Five-Year Plan for Solar Power Development". By the end of 2015, China's installed capacity of solar power has reached 21 million kilowatts, and the annual power generation has reached 25 billion kilowatt hours. According to the reporter's investigation, at present, China's research and testing of solar power grid-connected is relatively insufficient. If grid technology is not strengthened, it may affect the progress of large-scale grid-connected solar power generation, which may affect the development of China's solar power industry. According to relevant persons from the State Grid, in recent years, although the State Grid Corporation is actively constructing smart grids and new energy transmission lines, and addressing key issues such as safe and stable operation, peaking and frequency modulation, and scheduling decisions after solar power is connected to the grid, At present, it is unable to meet the large-scale centralized Internet access of new energy sources such as solar energy. Distributed energy construction and energy storage technology research and development is an important supporting solution to the problem of grid connection of renewable energy. Experts propose that the research and development of distributed energy construction and energy storage technology is an important supporting measure for China's smart grid construction, which can greatly reduce the load pressure of the power grid. . Taking wind power as an example, Feng Limin, deputy director of the Smart Grid Office of Jilin Power Company, said that Jilin Province has abundant wind power resources, but wind power has almost no rules to follow, making it difficult to use. Large-scale wind power grid connection will bring difficulties to the grid frequency adjustment, and may even worsen the local grid voltage level. Starting from distributed energy is an effective entry point to solve the problem of large-scale grid connection of wind power. Feng Limin said that the decentralized construction of wind farms and the decentralization of wind power into the grid can improve the capacity of the grid. At the same time, compared with centralized access, it can also reduce the pressure on the grid load. Especially in rural areas, rural power grid construction is relatively weak, power supply capacity of distribution network is insufficient, power supply radius is too long, and terminal power supply capacity will be greatly affected. Wind power decentralized access can also effectively solve the low voltage problem of rural power grids. The construction of distributed energy in solar power generation has been put on the agenda. According to the "Twelfth Five-Year Plan for Solar Power Development", by the end of 2015, China will focus on the construction of distributed photovoltaic power generation systems in the central and eastern regions, and build a total installed capacity of 10 million kilowatts of distributed photovoltaic power generation. In combination with smart grid technology, China will build 30 new energy microgrid demonstration projects during the “Twelfth Five-Year Plan†period. In doing so, the power is absorbed locally, and the power can be fully utilized. Second, it is not necessary to transmit power over long distances, saving a lot of investment and reducing transmission loss. Third, the power is dispersed, and the voltage level of the access system is low. In addition to building distributed energy, research and development of energy storage technology is also an effective measure to solve the problem of grid connection of renewable energy power generation with smart grid construction. “The most urgent application of energy storage technology lies in wind power.†The experts from the Academy of Electric Power came to Xiaokang to say that the problem of off-network and abandonment caused by large-scale wind power development has brought new regulations to the country: the wind rate exceeds 20%, and the local No new wind power projects can be built. If the energy transmission technology is used to change the transmission of wind power from power transmission to time transmission, it can smooth the fluctuation of wind power instability. However, Xiaokang believes that energy storage technology is a difficult problem in the world. The capacity, safety and economy of energy storage technology still need to further increase research and development breakthroughs. At present, State Grid has invested in the “Landscape Storage and Demonstration Project†integrating wind power generation, photovoltaic power generation, energy storage power station and intelligent substation in Zhangbei, Hebei Province, which proves that the integrated project can solve the problem of renewable energy grid connection. Feasibility, but due to the high cost of the battery, this project is still difficult to break even. According to reports, the project balance point needs to achieve 5,000 cycles of battery recycling, and the cost of power generation per kWh is 1,500 yuan. The industry insiders told reporters that according to China's current battery technology costs are at least double the balance point. -- The trend of international cooperation At present, the smart grid has become a hot spot for global research and development. Due to the different national conditions and economic development characteristics of different countries and regions, smart grid construction also has its own characteristics. This also contributes to international cooperation and complementarity. The United States is the earliest proponent of the smart grid concept and the earliest practitioner of the development of smart grid. After years of development, it has accumulated some successful experiences. Matin J. Schoenbauer, director of the US Department of Energy's China Office, expressed his hope that Chinese and American companies will further strengthen cooperation in the smart grid industry when attending the 4th China Smart Grid Conference in Shanghai. “China and the United States have better complementarities in smart grid construction.†Matin said that China’s smart grid construction has advantages in terms of transportation. The US smart grid construction has more sufficient experience in distribution and user application promotion. It can provide better service solutions based on the characteristics of end-user consumption, comprehensive consideration of demand and supply balance. At present, a US company has built a smart grid energy-assisted project in Tianjin, which can reduce power consumption and improve energy efficiency. The staff of Sino-US joint venture and Anhui Meineng Energy Storage System Co., Ltd. told reporters that the United States and Japan have obvious advantages in energy storage technology. The company uses ZBB's third-generation intelligent power storage and control technology to develop products ranging from 50 kWh to 5,000 kWh and above. Yang Xianli, deputy secretary-general of the Smart Grid Equipment Working Committee of China Electrical Equipment Industry Association, said that different countries have different complementary points in the field of smart grid construction. Take the United States as an example, the United States has obvious advantages in the basic technology of smart grid. Among them, the sensor technology in the United States is a key technology worthy of reference in China, which is one of the key technologies for smart grid construction. The development of smart grid construction in Europe is relatively early, and the technology is relatively mature. Especially in the field of distributed energy, the technology of grid-connected wind power is worth learning from. “Denmark has become the largest R&D base for smart grids in Europe.†Lin Na, the consulate general of the Kingdom of Denmark in Shanghai and the clean technology project manager of the Danish Technology Entrepreneurship Center, said that about 22% of the research and development results of the European smart grid are produced in Denmark. There are a large number of distributed energy sources in Denmark, and there are many cogeneration companies with a wide range of smart grid applications. There are also mature technologies in wind power integration. Yang Haorui, investment manager of the Danish Investment Promotion Agency, said that the cost of wind power generation in Denmark can be equal to the cost of traditional energy generation, and wind power companies can achieve better profits. At present, many Chinese companies have set up wind farms in Denmark and set up R&D centers. It is hoped that Chinese companies and Denmark will carry out more extensive and in-depth cooperation on renewable energy technology utilization and smart grid.
Switches And Sockets,Multi Plug Socket With Switch,Remote Control Plug Socket,Electrical Sockets And Switches
B-F-B-ic international Ltd.co , https://www.ledgather.com