Zhao He, an expert in smart grid research for many years, was interviewed on issues related to smart grids. China has the conditions to develop smart grids. Zhao He said that the research work of smart grid originated in the United States, and then some other countries have approved their views and started research, with the goal of realizing smart grids in 2020 or beyond. Europe established the European Smart Grid Forum in 2005. At the same time, the world-famous information industry giants such as IBM, Google, and Intel have entered the smart grid field. He told reporters that in fact, as early as Bush’s presidency, the United States has proposed the concept of smart grid. It is only when Obama launches the New Energy Policy that the smart grid has received more attention as an important part of the energy new deal. Zhao He believes that the development of smart grids in the United States is mainly based on the consideration of improving energy structure. In order to alleviate the contradiction between the growth of power demand and the aging grid framework, the contradiction between the operation cost control and the uncertainty of the corresponding regulatory policies. European countries' energy policies place greater emphasis on environmental protection, especially encouraging renewable energy development such as wind, solar and biomass, and promoting low-carbon electricity, renewable energy and efficient energy use. The development of smart grids in Europe is mainly to meet the needs of new energy sources. China is also faced with the objective needs of improving energy structure and protecting the environment. It is necessary to develop smart grids. According to reports, at present, China is in a leading position in the field of basic technology research in the power grid. Have the conditions to develop smart grids. Zhao He said that the intelligent distribution network has the connotation and characteristics of controllability, flexibility (real-time analysis), reliability, self-healing and economy. For power customers, the smart grid can not only help the electricity customers to automatically save energy, but also enable the electricity customers to sell the remaining power. For grid operators, smart grids can also achieve more optimal control and reduce grid maintenance costs. Equal attention has been paid to smart grid technology as well as UHV technology. At present, China is vigorously developing UHV. The 1000 kV Jindongnan-Nanyang-Jingmen UHV AC test demonstration project has been safely operated for more than 100 days. According to the plan, by 2020, China's UHV power grid will be basically completed. By then, the power transmission will reach 200 million kWh or more, accounting for 25% of the total installed capacity of the country. There is currently no consensus in the industry regarding whether UHV technology should be developed or smart grid technology should be developed. Zhao He said that UHV technology is a solution to the problem of power transmission efficiency. Smart grid technology covers all aspects of power generation, transmission, distribution, and demand side. UHV can be understood as "open source" and the smart grid is understood as "throttle." The smart grid and UHV should be developed in parallel at the same time, and the two do not conflict. The development of UHV can adapt to the needs of China's long-distance transmission of electrical energy. The development of smart grids can make our grid more flexible, more economical, more reliable and safer. However, Zhao He believes that if the development of smart grid, it should pay more attention to the distribution network. In his view, once the transmission grid is built, it is relatively stable, and the requirements for the distribution network are much more complicated. According to Zhao He's description, the smart grid will be powered according to the user's demand for power quality, safety and reliability. The expansion, maintenance and operation of the grid are flexible, optimized and planned, with flexible demand side management and users. Drive the value-added services market, coordinate local energy management and the full integration of distributed generation, renewable energy and large-scale centralized power generation. However, although China currently has the conditions for developing a smart grid, there are some difficulties. As a systematic and complex project, from the initial research to the gradual realization, a long process is required. Zhao He believes that compared with developed countries, China's main grid of power grids still has certain defects. There are also some problems in the distribution network. For example, the distribution network structure is relatively weak, which limits the power supply capacity. The distribution network automation application is small, and the practical level is low. The relevant technical standards and specifications of the distribution network are not perfect. The lack of uniformity and standardization of terms; the lack of basic data management in distribution networks, and the need for information technology needs to be improved. It is understood that the main difficulties facing the development of smart grids in China are technical, management and policy support issues. “For example, the smart grid is a more flexible grid, which means that the current grid standards need to be adjusted accordingly.†Smart grid is a very complex system engineering, not one day can be achieved. When talking about the policy package, Zhao He gave an example. For example, the technical research on the peak-to-valley pilot needs the supporting support of the national electricity price policy. At present, there are certain technical problems in the smart grid. Zhao He said that the smart grid involves the development of five important grid technologies—large-capacity power storage technology, power quality control technology, trend flexible control technology, high-level information integration technology, and intelligent scheduling technology. He believes that the development of smart grid technology, the next step is to study the intelligent distribution network control theory and method to achieve grid self-healing control; research distributed power into the distribution network operation control and protection technology, optimize the transmission and distribution of all links Coordinated scheduling; research on the use of power electronics technology to achieve power quality control and flexible distribution of electrical energy, reduce losses, improve power supply reliability and power quality. Ac Contactor,Contactor For Ac Unit,Compressor Contactor,Air Conditioner Contactor NanJing QUANNING electric Co.,Ltd , https://www.quanningtrading.com