Smart grid development in the next decade

From the Asia-Pacific Intelligent Power Summit held recently, it was learned that the Ministry of Science and Technology's 863 plan will invest 1.05 billion yuan during the “12th Five-Year Plan” period for research on major special projects of the smart grid. The research includes 20 topics such as large-scale wind power access to the power grid, electric vehicles, high-density distributed power, solar power generation, and power transmission and transformation equipment. This is the first time that the national level has conducted research on the smart grid.

Experts pointed out that since cross-regional power transmission is an unavoidable issue for China, strong grids and intelligence will be the two pillars of China’s future power grid. The integration of large-scale renewable energy into the power grid and integrated power supply is an important feature of China's smart grid in the future, which will greatly reduce the reliance on fossil fuels and help reduce the impact of natural disasters such as freezing rain on the safety of electricity. Given that the smart grid is currently focused on the transmission side, in the next five years, the technological focus must gradually shift to the areas of power distribution and power consumption.

Analysts said that “the next 10 years will be a major stage of construction of the national smart grid. Enterprises that want to make money in this area must seize the time and develop new products as soon as possible, otherwise it will be too late.”

Smart grid, the future development direction of the power grid Driven by the awareness of green energy conservation, the smart grid has become a key area for competitive development in all countries in the world.

The smart grid is an electricity network that is self-repairing, allowing consumers to participate actively, recover from attacks and natural disasters in a timely manner, accommodate all power generation and energy storage, can accept new products, services and markets, and optimize asset utilization and operating efficiency. The digital economy provides power quality.

The smart grid is based on an integrated, high-speed, two-way communication network. It aims to use advanced sensing and measurement technologies, advanced equipment technologies, advanced control methods, and advanced decision support system technologies to achieve reliable, safe, economical, and efficient power grids. Environmentally friendly and safe to use for efficient operation.

Its development is a gradual and gradual evolution, but it is not a radical change. It is the result of the collaborative development of existing technologies and new technologies. It also encompasses a wider range than the network and smart meters.

Build a strong smart grid featuring UHV power grids as backbone grids, coordinated development of power grids at all levels, and featuring information, automation, and interaction to comprehensively improve the safety, economy, adaptability and interaction of power grids. , Intelligence is the key.

Smart equipment, a key smart grid for smart grid development is the future direction of the entire power network, with a focus on new energy generation, network reliability and efficiency. For power equipment manufacturers, how to realize integrated control and integration in power generation, transmission, distribution, and power consumption is the focus of attention; and for automation companies, automation is provided in the entire value chain from power generation to electricity use. , IT and controllable electrical equipment to meet the needs of the smart grid are the core of the future electricity market.

Power equipment is an important infrastructure in the power grid, especially in transmission and distribution networks. To meet the needs of the smart grid in the future, we need to provide efficient and reliable smart power equipment. So, how can we realize the intelligence of electrical equipment?

With the development of science and technology, advanced technologies such as new mutual sensing technology, sensing technology, intelligent components, and communication technologies have made it possible to intelligentize power equipment.

The new type of electronic transformer The traditional electromagnetic current and voltage transformer is difficult to directly complete the computer technology requirements for the digital processing of the complete information of current and voltage, and it is difficult to realize on-line monitoring of changes in the power parameters of the power grid. A new type of current-voltage transformer that can be used with a digital network becomes an urgent need for safe and efficient operation of the power grid.

With the digital development of computer technology and secondary measurement and protection of power equipment, power systems have become increasingly demanding for measurement, protection, control and intelligent data transmission, automation, and safe, reliable and high-quality operation of power grids. The intelligence, miniaturization, modularization, and electromechanical integration of electrical equipment such as measurement, protection, monitoring, and transmission are important for the safety, reliability, and high-quality operation of the power grid. This has become the mainstream of domestic and foreign well-known power equipment manufacturers for product R&D.

The new electronic transformers are divided into two types: active and passive, with excellent insulation performance, anti-electromagnetic interference, unsaturation, easy digital signal transmission, high measurement bandwidth and accuracy, compact structure, light weight, and no noise during operation. In 2003, domestic pilot electronic transformers were started. In 2006, they began to be used in pilot projects throughout the substation, and all-fiber transformers were tested in the last three years.