Faced with the increasingly severe problem of energy shortage in the world, the development and utilization of renewable energy has become a common choice for all countries in the world to ensure energy security and realize sustainable development. In view of the limitations of China's energy endowment, accelerating the development and utilization of renewable energy is an inevitable choice for China to achieve sustainable energy development. Policies support the development of renewable resources and benefit greatly from the development of smart microgrids.

Unprecedented policy support measures will be introduced

“A series of laws and regulations and supporting policies have been issued in succession in China, which not only provides a strong guarantee for the development of renewable energy, but also expresses our country’s determination to unswervingly develop renewable energy.” National Energy Administration New Energy and Renewable Energy Director Dong Xiufen said at the “Seventh China Electromechanical Equipment Innovation and Development Forum” smart microgrid sub-forum.

Since the enactment of the "Renewable Energy Law" in 2005, China has successively issued the "Guiding Catalogue for the Development of Renewable Energy Industries," "Mid-term and Long-term Development Plan for Renewable Energy," "11th Five-Year Plan for Renewable Energy," and "Can The Interim Measures for the Development of Renewable Energy and the Management of Special Funds, the Trial Measures for the Administration of Renewable Energy Power Generation Prices and Expenses, and the Interim Measures for the Administration of Supplementary Energy for Renewable Energy Electricity Prices have ensured the rational use of renewable energy.

Meng Xianji stated: “The difficulty in grid connection is a problem in the application side of renewable energy, and the new regulations on the construction and maintenance subsidies for power grids in the Interim Measures for the Administration of Renewable Energy Price-Added Subsidy Funds, and the economic stimulus to the grid will inspire them to attract new ones. The enthusiasm for energy access to the Internet.” To promote the development of distributed generation, the National Energy Administration will issue relevant management measures to address the current status of distributed energy development in China, and issue guidance on the issues of distributed generation and grid connection; A number of targeted policies and measures will be introduced; for the recent “double counter” investigations in the United States and the recent EU, the National Energy Administration will have some follow-up actions in the near future.

It is reported that China will soon implement a renewable energy power quota system, stipulate the proportion of renewable energy according to the total electricity consumption of all localities, establish a sustainable and reliable market for renewable energy, and solve the problem of “who will buy it and who will use it”. While increasing incentive support, it strictly regulates the phenomenon of wind abandonment to prevent blind expansion of wind power and waste of energy. Recently, the National Energy Administration issued an emergency document, requiring all provinces (regions and cities) to strictly implement the wind power project approval plan. In areas where wind power has exceeded 20% of wind, no new wind power construction project may be arranged in principle.

Strong smart grid effectively enhances accommodation capacity

On August 15th, at the State Grid’s press conference to promote new energy development such as wind power, a spokesperson for the State Grid, Zhang Zhengling, stated that China’s grid-connected wind power is 52.58 million kilowatts, which has replaced the United States as the world's largest wind power country. The grid-connected wind power within the national power grid dispatched area reached 50.26 million kilowatts, which is an average annual growth rate of 87% in six years.

Large-scale wind power consumption is a worldwide problem. In China, because of limited resources, there are objective reasons such as the concentration of wind power resources, distance from load centers, single power supply structure in wind power concentrated areas, and weak system peak adjustment capability. Compared with foreign countries, the issue of wind power consumption in China is even more prominent.

“The key issue at the moment is that the linkages between the regions are still weak, and a unified national market and a nationwide networking capacity are not yet formed. It is difficult to adapt to the large-scale development of wind power in the next step and optimize the deployment in a larger area. Needs.” Shu Yinhao, deputy general manager of the State Grid Corporation of China, said at a press conference to promote new energy development such as wind power.

Huang Weiguang, director of the Clean Energy Technology Development Center of the Chinese Academy of Sciences, also stated: “The UHV has played a significant role in promoting the cross-regional allocation of energy resources, especially the opening of large-scale hydropower and large-scale wind power transmission channels in the western region.” Technical management issues have also been continuously resolved.

“When large-scale uncontrollable wind power and photovoltaic grid-connected, the use of power generation scheduling methods for power balancing is not necessarily economic. The use of load scheduling methods to track uncontrollable power supplies may be an effective complement to future power system dispatch. Smart grid is The optimal platform for load scheduling.” Wang Xifan put forward a new concept of load scheduling at the Smart Microgrid Forum and proposed a new path for the consumption and utilization of renewable energy.

"In 2012, China has entered a period of full-scale construction of a strong smart grid. On the one hand, its construction and development can solve the problem of safe and stable power grid operation brought about by large-scale clean energy access, and effectively improve the ability of the grid to accept clean energy; on the other hand, Strong cross-regional grid structure can provide output conditions for the scale and intensive development of clean energy away from the load center, said Shen Jiang, deputy director of the State Grid Corporation of China Smart Grid Department, in an interview with the reporter.

Smart Microgrid Renewable Energy Utilization

On August 16, the verification and acceptance of the “Pilot Project for Distributed Power Generation, Energy Storage, and Microgrid Access Control” by Hellhund in Mengdong, provided important demonstrations for China's distributed renewable energy access to the power grid. Landmark significance. “Microgrid is another good path for the use of renewable energy. In light of the limitations of China’s resource endowments, microgrids have the advantage of self-use, reducing the burden on the grid, increasing investment enthusiasm, and facilitating the development of the market; because of their good safety performance The chance of survival is high, and the use of renewable energy will play a greater role in promoting.” said Meng Xianyi.

The 12th Five-Year Plan for Renewable Energy Development clearly states that by 2015, 30 new energy microgrid demonstration projects will be built throughout the country. “For the construction and demonstration of microgrids, the National Energy Administration will organize a number of demonstration projects and implement a series of promotion measures to implement renewable energy planning and promote industrial development,” said Dong Xiufen.

Du Hong, general manager of Beijing North Micro-grid Technology Co., Ltd., said: “Photovoltaic power generation is the first choice for renewable energy. The current economic growth rate has slowed down, export is blocked, and the photovoltaic industry is facing difficulties; developing our own renewable energy needs and markets, Supporting the development of smart microgrid technology will promote the use of renewable energy." "2012 7th China Electric Equipment Innovation and Development Forum" smart microgrid sub-forum, put forward a new concept of "micro-grid with Chinese characteristics." Micro-grid with Chinese characteristics supports a variety of new energy distributed generation, can achieve rapid isolation, no impact on the large power grid; can be connected to the grid, but also isolated network operation, plug and play, seamless switching; at the same time, with energy storage systems, Support peak-cutting and valley-filling, with high-efficiency energy management capabilities, and improve energy efficiency.

“A good microgrid is an exemplary distributed power source or an exemplary load for a large power grid; a good microgrid is a reliable power grid for users, with high reliability; it is a Intelligent, two-way interactive grid." Du Hong explained China's unique microgrid.

“Although micro-grid technology has become a frontier technology for power system development, at present, the development of micro-grid lacks relevant technical standards and specifications. With the establishment and improvement of technical standards and specifications, in the future, micro-grid will become an open renewable energy application. 'Golden Key'.” Meng Xianzhe is full of confidence in the development and utilization of renewable energy.