How can smart grids better adapt to new energy access and provide a platform for the integration and use of renewable energy? How can smart grids better interact with users and benefit users? How does the smart grid construction draw a clearer line of technological development on the connotation and extension to make itself more “intelligentâ€? At the 2014 China Clean Power Summit smart grid sub-forum organized in 2014, many industry experts and business leaders conducted in-depth discussions. Faster "standardization" of smart grids “The CEC has previously published two reports on the smart grid, one is “Smart Grid Policy Research†and the other is “Smart Grid Development Research Report.†We believe that the development of the smart grid is also facing many practical problems.†Zhang Weidong, deputy director of the planning and statistics department of the Electric Power Enterprise Federation, introduced that the core requirement of the development of clean energy for the smart grid is energy storage or mediation. In addition to the power system itself, mediation may extend to the entire energy system. . From a development point of view, China’s hydropower may face a “fault†crisis in 10 years; coal power development will stagnate after 2030, and it is currently facing the problems of developing coal power, causing haze, land destruction and subsidence. Compared to coal-fired electricity, nuclear power has become a type of alternative "power supply" that has to be hoped for; China's natural gas resources are insufficient, and if large-scale development, it requires a lot of imports, so natural gas power generation is "noble" enjoyment; wind power development Fast, but in 2012, the amount of wind was up to 20%, and in 2013 it was close to 15%. Therefore, reducing wind-reduction is not a small challenge; solar power “seems beautifulâ€, and one square kilometer can theoretically hold about 100,000 kilowatts. Solar energy, but it involves costs and transportation problems, can only "step by step." "What's gratifying is that the smart grid standardization work has been developing rapidly in recent years, and some key areas of standards have made positive progress." Liu Yongdong, deputy director of the China Electricity Council Standardization Center, said that at present, the new energy is connected to the grid, especially large-scale The relevant national standards for renewable energy grid-connected, wind power, and photovoltaic have been successively introduced and continuously improved. For example, in the field of power transmission, the UHV AC/DC standard system is basically complete, and the standard system for UHV AC/DC transmission is completed for the first time in the world. In the field of substations, many key substation national standards have been completed and the framework structure has been basically established. In the field of electricity use, a series of industry standards for smart meters have also been introduced. In terms of smart demand side management, the standard charging system for electric vehicles has been basically established. Therefore, the smart grid is developing very rapidly from a standard perspective. How to narrow the market application gap? In 2000, Germany decided to use half a century's time to bid farewell to the fossil energy era, enter the era of renewable energy, and become the world's first industrial power to enter the era of renewable energy. "China's development of renewable energy, wind power and photovoltaic power generation are the biggest bottlenecks, and wind-reduction rates are as high as 15%, which means nearly 10 billion yuan each year." It is equivalent to 1/50 of China's.†Tao Guangyuan, China-Germany Renewable Energy Cooperation Center believes that the development of wind power and photovoltaic power generation requires large-scale development of long-distance high-voltage transmission and distribution networks, which requires early research and planning. At the same time, reasonable renewable energy grid-connected electricity price system and electricity sales price system also need to be stipulated. In this regard, we can refer to the German experience in the electricity market. We can even generate negative electricity prices in the peak bands of wind power and photovoltaic power generation. “Who uses electricity for whom?†This seemingly loss-making trade can make the wind fall dramatically, from the whole In the interest chain, the positive effect of promoting the development of smart grids can still be achieved. The core rules for smart grid implementation are applicable to the market, motivating users, realizing asset optimization, and meeting efficient operations. But the fact is that the smart grid is still far from the vast majority of the people. How to shorten the application gap? “The smart grid is an important part of a smart city. Perception, interconnection and intelligence are the goals that the smart grid respects. China has installed 200 million smart meters in 3 years, which is the largest in the world, but in terms of practical results, Many functions did not come into play.†Wu Wenpeng, chief scientist of China Electric Power Research Institute, believes that the advanced measurement system in the smart grid can accurately collect power consumption information, but the acquisition is only one of them, and the user must also use the power in time. Information is fed back to the user in order to form an interaction. If the time-of-use price is introduced, relevant departments should promptly transmit information to users through mobile phones or websites, allow users to better grasp the time of electricity consumption through interaction, save economic costs, and receive obvious social and economic results. Will promote the popularity and coverage of smart meters. Of course, there should be big data analysis and application support behind this. It is not only necessary to comprehensively grasp the information of power distribution, transmission, and power consumption, but also the analysis and advanced application of the collected data. It should promote the development of smart grids through standards, policies, and electricity prices. Technical and policy improvements need to be synchronized According to China's energy development goals in 2020, if energy storage is used for stable output of 30% wind power and photovoltaic power generation in the country, direct benefits will be 600 billion yuan, 69 million tons of raw coal will be saved, and the emission of sulfur dioxide and carbon dioxide will be 1.2 million tons respectively. 139 million tons. "Based on the current cost situation, among various energy storage technologies, sodium-sulfur batteries are one of the first to go commercialization, and are widely used in peak load shifting, renewable energy grid-connected and emergency power supplies, etc." China Electric Power Academy of New Energy Tao Yibin, deputy director of the Institute's energy storage room, said that sodium-sulfur battery technology has long been monopolized by Japan's NGK. China began to study sodium-sulfur batteries in the 1960s, but due to some insurmountable difficulties, progress has been very limited for a long period of time. Until 2006, the Shanghai Institute of Ceramics, Chinese Academy of Sciences and the Shanghai Electric Power Company collaborated to independently develop 650 ampere-hours of large-capacity single-cell sodium-sulfur batteries for energy storage, and then used it for a period of two years to push it into engineering research. We have developed a 2 MW low-volume platform and our country has thus become the only country in the world except Japan to reach this level. The state should study relevant industrial standards of energy storage technology as soon as possible, strengthen the investment in basic research of energy storage technology, earnestly encourage technological innovation, and master independent intellectual property rights; from the initial stage of the development of large-scale energy storage technologies, they should pay attention to environmental factors and prevent environmental pollution; The role of energy storage in energy conservation and emission reduction was brought into play, and the encouragement policy for new energy was extended to energy storage. “In addition to the technical aspect, the macro policy level also needs to be continuously followed up.†Zhang Weidong puts forward several suggestions: decision support and electricity price reform still need to be promoted, sales must focus on guiding electricity interaction, promote clean energy consumption, in addition to ladder price In addition, the peak and valley electricity prices and time-of-use electricity prices can be piloted; the support for financial and taxation policies for clean energy and smart grids should be moderated to avoid waste; pilot projects should be promoted to provide factual evidence; independent innovation and personnel training should be strengthened; and technologies should be used to promote further economic development. Coordinate the promotion of industrial chain extension and coordinated development of related industries, such as promoting the development of intelligent power industry alliances; and overall promote the internationalization of smart grid industry. Fluorescent Brightener BBU Optical Brightener BBU,Liquid Blancophor BBU,Liquid Blancophor Bayer,Fluorescent Brightener Agent BBU FORING IMPORT & EXPORT CO.,LTD , https://www.foringfor.cn
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Accelerating the process of smart grid standardization