Development trends of distributed power sources

In recent years, distributed power sources have developed rapidly in various parts of China. State Grid Hebei Electric Power takes the southern region of Hebei as a sample to analyze and predict the development trend of distributed power generation, providing reference for the construction of smart energy systems.

China is rich in new energy resources and has the resource conditions and technological potential for large-scale development. At the same time, under the common vision of strengthening cooperation and promoting innovation globally, as a new economic growth point, the prospects of the renewable energy industry are quite promising, and promoting the development of the new energy industry is imperative.

In recent years, the southern region of Hebei Province has experienced rapid development of distributed power generation based on new energy due to factors such as natural conditions, residential distribution structure, and air pollution prevention and control in Beijing Tianjin Hebei. The average annual growth rate of installed capacity has exceeded 300%. State Grid Hebei Electric Power combs out current policies, outlines the current development status of new energy and distributed power generation, analyzes and predicts the development trend of distributed power generation, proposes development suggestions for new energy and distributed power generation, and provides scientific reference for the construction of new energy system.

Policy benefits promote sustainable development of distributed power generation

The implementation of the national new energy strategy and the formulation and release of relevant policies have consolidated institutional guarantees for the construction and promotion of distributed power generation, promoting significant development of distributed power generation, and presenting a trend of "multiple points, wide areas, and local high-density grid connection". In the past three years, the average annual growth rate of distributed power generation in China has exceeded 100%.

In 2017, the National Development and Reform Commission and the Energy Administration jointly issued multiple documents such as the "Notice on Conducting Pilot Marketization Transactions for Distributed Power Generation", officially launching the construction of pilot projects for market-oriented transactions for distributed power generation. The Hebei Provincial Government actively responded by issuing the "Notice on Conducting Pilot Marketization Transactions for Distributed Photovoltaic Power Generation", formulating detailed rules for the implementation of distributed power generation market transactions, and making detailed regulations on the scale and trading methods of power stations that can participate in the pilot market transactions. By coordinating factors such as access and consumption capacity, distributed photovoltaic power generation resources and sites are mainly selected in the southern region of Hebei, which can be consumed nearby while ensuring the profitability of market-oriented transactions in distributed photovoltaic power generation. It is expected that in the future pilot selection, priority will be given to areas with surplus consumption capacity.

As one of the "Top Ten Targeted Poverty Alleviation Projects" of the Poverty Alleviation Office of the State Council, photovoltaic poverty alleviation has realized the organic combination of poverty alleviation development, new energy utilization, energy conservation and emission reduction. The Guiding Opinions on the Implementation of the 13th Five Year Plan for Renewable Energy Development issued by the National Energy Administration put forward new construction indicators for photovoltaic. Most provinces, such as Shandong Province, Hebei Province, Shanxi Province, Inner Mongolia, etc., use all the new construction indicators for photovoltaic poverty alleviation projects.

New technologies and models will change the development trend of distributed power generation

New technologies will lead the development of distributed power generation. In the grid connection of distributed power sources, energy storage devices can smooth the output power of the power source through appropriate charging and discharging, thereby reducing the impact or fluctuation during the connection of distributed power sources. The combination of distributed generation and Energy storage will greatly improve the energy utilization and economy of the system.

In addition, the application of intelligent grid connection technology plays a promoting role in distributed power generation. When a large amount of clean energy is connected, the power supply and load using virtual synchronous machine technology can independently participate in the operation and management of the power grid, and have a consistent operating mechanism with synchronous units to resist external disturbances on the synchronous system.

The optimal layout of distributed generation and flexible and efficient grid connection is one of the important tasks of green energy development in Xiong'an. Hebei Southern Power Grid will take Xiong'an as the leader, drive the construction of the energy system of the New Area with technological exploration and breakthrough, and improve the energy system and mechanism of the New Area with innovation and iteration of thinking. Xiong'an will become an incubator and experimental field of new energy and distributed power generation technologies, new management, and new models, so as to establish an energy system with clean low-carbon as the development direction, electricity as the center, and smart grid as the configuration platform.

The new mode will stimulate new momentum in distributed power generation. The flexibility of the power grid is the core of new energy consumption, and power auxiliary services are one of the means to improve the flexibility of the power grid. In November 2017, the National Energy Administration released the "Work Plan for Improving the Compensation (Market) Mechanism of Electric Power Auxiliary Services", proposing to achieve full coverage of electric power auxiliary service compensation projects, encourage energy storage equipment and demand side resources to participate in providing electric power auxiliary services, and allow third parties to participate in providing electric power auxiliary services. In the long run, auxiliary services will serve as a breakthrough point for large-scale energy storage to participate in grid regulation, and become a new driving force for the rapid development of new energy, energy storage and other industries.

Building a safe, reliable, efficient, clean, and low-carbon smart energy system

In view of the current situation of the rapid development of distributed generation, based on traditional energy systems, advanced information technology and intelligent management technology should be used to integrate meteorological data, power grid data, etc., carry out Big data analysis, deeply couple information systems and energy systems, achieve the coordinated development, integration and complementarity of "source network load storage", and build a safe, reliable, intensive, efficient, clean and low-carbon smart energy system.