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The White Paper on Chinaâ€™s Energy Policy (2012), which was recently released, elaborates on Chinaâ€™s current status, policies, and targets for energy use. The White Paper pointed out that the country will formulate distributed energy standards, improve the formation mechanism and policies of distributed energy on-grid tariffs, and strive to achieve direct supply of distributed generation and non-discriminatory accessibility to the power grid. State Grid Corporationâ€™s "Opinions on Doing a Good Job of Distributed Photovoltaic Power Grid-connected Services," which was implemented on November 1 this year, points out that domestic distributed photovoltaic power generation companies can access the national grid and enjoy free access services.
The 12th Five-Year Plan for Energy Development in China also highlights the development of distributed energy. At present, the development of distributed generation has been pushed to the front. In order to better understand the issues related to distributed generation, the reporter specifically interviewed Wei Xinhua, deputy inspector of the Industrial and Commercial Research Department of the State Council Research Office.
Distributed generation is still in its infancy. Reporter: What is the specific concept of "distributed power generation"?
Wei Xinhua: So far there has been no definite and unified definition of distributed generation. In my opinion, distributed generation is a form of distributed energy use. According to the different primary energy sources used, distributed generation can be divided into fossil energy, renewable energy, and hybrid distributed generation. Specifically, it mainly includes solar power generation (photovoltaic cells, solar thermal power generation), wind power generation, biomass power generation, hydropower, tidal energy, ocean energy power generation, as well as waste heat, residual pressure and waste gas utilization power generation, and small natural gas cooling, heat and electricity Multiple supply and so on.
Reporter: What is the development of distributed generation?
Wei Xinhua: With the development of power generation technology using decentralized energy resources, the concept of â€œdistributed power generationâ€ or â€œdistributed power supplyâ€ emerged in the 1980s. Today, distributed generation is well developed in the United States, Japan, and Europe. In recent years, China's distributed power generation has also achieved rapid development, and it has taken an internationally leading position as a whole. As of the end of 2010, the proportion of distributed generation installed capacity in China, Germany, the United States, and Japan was 3.5%, 22.8%, 2.5%, and 5.5%, respectively.
Here, I would like to point out that the overall leading position of distributed power generation in China illustrates the supporting role of China's power infrastructure, especially the power grid. Without the development of electric power infrastructure and power grids, we cannot explain the rapid development of distributed generation, especially wind power and solar power generation. Both China and the world have achieved significant development in distributed generation.
However, compared with the development of distributed generation in the future, distributed generation is still in its infancy from a worldwide perspective.
Distributed generation will bring about a grid revolution Reporter: State Grid Corporation of China proposed that distributed power generation projects with voltages of 10 kilovolts and below and individual projects with a capacity of no more than 6 megawatts can be accessed free of charge. The development of distributed generation will profoundly influence the development and evolution of the power grid. How do you see the relationship between distributed generation and the grid?
Wei Xinhua: China has been arranging power supply according to the demand of electricity load for a long time. Now more access to distributed generation will bring about revolutionary changes in the power grid system, and the ability of the grid to allocate power generation resources will be improved. Enhanced. From the point of view of grid technology, the characteristics of decentralized and random changes in a large number of distributed generations will affect the safe and stable operation of the medium-voltage or low-voltage distribution systems that are connected to them, and thus the requirements for the grid are getting higher and higher. The grid will also be smarter. The ability of the grid to allocate energy resources and its scale complement each other, and the basis for achieving this is the intelligentization of the power grid, that is, modern large-scale power grids will introduce more information technologies and continuously implement information technology to transform the power grid.
In addition, under the circumstances that a large number of distributed generations are connected, how to reform and innovate the electricity market will create a multi-win-win business model in any region or within an electricity market. This will lead to long-term strategies and less expediency. It is the future that needs careful research and effort. The relationship between distributed generation and the power grid must also consider the development of future energy storage systems.
Reporter: In what areas will distributed generation also affect?
Wei Xinhua: Distributed generation will promote the development of equipment manufacturing. Last year, the National Development and Reform Commission issued the "Guidance on the Development of Distributed Natural Gas Resources". One of the important goals is the development of equipment. Distributed generation will also promote the development of information technology. On the one hand, distributed generation will promote the application of information technology in power generation, power collection, transportation, and end-users. On the other hand, the development of information technology will promote the expansion of installed capacity and generation capacity of distributed generation in the future, promote the improvement of distributed generation efficiency and the higher intelligence of the power grid, thus creating a more stable and virtuous cycle of distributed generation development. .
Distributed generation is the trend of the times Reporter: The "third industrial revolution" has been widely discussed recently. Its core is the combination of information technology and new energy, especially distributed energy use, especially distributed generation. How do you see the development trend of distributed generation?
Wei Xinhua: From a realistic point of view, in China, the dependence on fossil energy, especially coal, will be long-term.
Then there are two problems, one is the relationship between large traditional energy bases and distributed generation, and the other is the issue of centralized development and decentralized development of distributed energy.
On the one hand, we must have decentralized and centralized distributed generation; on the other hand, we must also consider large coal-fired power, large hydropower, and large nuclear power, which is determined by our energy resources endowments. We must have centralized development of distributed generation, such as â€œThree Northâ€ wind power. At the same time, we must also cope with more decentralized distributed power generation, such as wind power, solar energy, and biomass power generation.
Reporter: How do you view the gradual increase in the proportion of distributed generation?
Wei Xinhua: There is no doubt that the proportion of distributed generation is increasing, while the proportion of traditional energy is decreasing. The proportion of distributed development of distributed generation is increasing, and the proportion of distributed development of distributed generation is also increasing. It may be faster in the future, and the proportion of distributed development of distributed generation will be relatively reduced. Therefore, our job is to seek a balance between "two upswings" and "two downs," and steadily push forward changes in the energy landscape. The development of distributed generation may be a long-term process. It will continue to advance and it will accelerate. We must be prepared.
With the development of technology, distributed generation may also see new forms of energy. The combination of technological developments, public environmental policies, and the expansion of the electricity market, together with the various advantages of distributed generation, make it a very important choice and content for the development of the power industry in the 21st century.
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