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The reporter learned that China's distributed power supply has grown rapidly in recent years, and the development of distributed renewable energy is the most prominent. According to statistics, as of the end of 2017, the installed capacity of distributed photovoltaic power generation was 29.66 million kilowatts, distributed wind power was 3.61 million kilowatts, and distributed natural gas power generation was 1.2 million kilowatts. Behind the ever-increasing data, the “into the network” road for distributed power access to the grid, the hot network and the gas network has gone a bit hard.

“Distributed energy is the only way to promote China's energy transformation.” Gao Hu, director of the Energy Economic Center of the Energy Research Institute of the National Development and Reform Commission, believes that distributed power must grow as quickly as possible.

In the horizontal direction, the development of distributed energy is becoming a global trend. Ma Tianrui, senior researcher at the World Resources Institute and director of the Global Distributed Energy Program, said: "These trends include the gradual formation of new business models, the emergence of peer-to-peer local energy deals and local energy markets, and renewable energy cogeneration is generating electricity and heating. And the three of the refrigeration are equal."

Longitudinally, as early as the 1970s, distributed natural gas multi-connection was the first to develop, and distributed power was widely concerned in the early 21st century. In recent years, it has developed toward the integrated energy system. China has also issued a series of policies to guide the establishment of a number of pilot demonstration projects with different application scenarios and different demonstration orientations in order to explore typical distributed energy utilization models suitable for park, urban and rural energy needs. China's relevant policies cover almost all clean energy resources such as solar energy, wind energy, natural gas, biomass energy and geothermal energy, as well as various types of projects such as power generation, gas production, heating and comprehensive utilization.

“Although the policy system has effectively promoted the development of distributed energy, there are also weak links.” Huang Bibin said, “For example, the natural gas project is an agricultural waste utilization project and an energy project involving the Ministry of Agriculture, the Ministry of Finance, the Energy Bureau, etc. Communication and coordination between multiple departments needs to strengthen coordination of measurement subsidies, land use concessions, financial concessions, and pipe network access. For example, distributed energy systems contain multiple clean energy sources, but need to be implemented according to different energy types. After filing, grid-connecting and subsidy-related procedures, after the unified system is connected to the grid, it is difficult to distinguish between different technologies."

How to make distributed power better connected to the grid, hot network and gas network?

In terms of distributed power supply access to the power grid, in recent years, the state has successively issued a series of distributed power supply related policy documents and management specifications, and grid companies have also issued documents to clarify the relevant grid-connected service requirements. "But the problem lies in the economics of accessing the network." Huang Bibin pointed out that under various access plans, operating modes and power grid transformation programs, there are differences in the total social costs.

According to him, State Grid Energy Research Institute Co., Ltd. has conducted empirical research on typical high, medium and low pressure cases in China. Under different scenarios, the comprehensive economic results of typical cases can differ by 40%. “Although the policy that is constantly being adjusted will also affect the calculation of some boundary conditions, but in any case, the cost of accessing the network should not be too high.”

In terms of heating networks and gas networks, the “into the network” of distributed power sources seems to be more rugged. On the one hand, China is the fastest growing market for heating and cooling demand in the world. In the central and northern regions, more than half of the major cities have district heating systems, and demand is increasing, but the degree of marketization of heating needs to be improved. . Therefore, the industry strongly urges to liberalize access restrictions in the heating market, in order to better open the heating market and promote the use of distributed energy in small and medium-sized cities and rural areas.

Although the national level issued the “Opinions on Accelerating the Use of Natural Gas” issued last year, it is necessary to promote natural gas distributed energy demonstration projects in conditional regions and occasions, and to distribute LNG as a gas source in uncovered areas of the pipe network. Pilots of energy applications, but the gaps in “third-party access standards and corresponding regulatory systems” have left the industry “worried” – lack of accessibility principles to follow, and low entry prices, how to achieve “fair access”? In addition, "when the pipeline provides transportation services to third parties", "when the binding relationship between natural gas sales and pipeline transportation is lifted" and "the independence of pipeline transportation services" are still unknown.

Many people in the interview believe that the work done by the grid may be the future direction of the heating network and the gas network. In other words, the current exploration of distributed power sources in the power grid may bring some thoughts and references for various types of distributed power access to the heat network and gas network.