Significance of Smart Grid

With the development of strong smart grid, the function of power grid has gradually expanded to promote the optimal allocation of energy resources, ensure the safe and stable operation of power system, provide diversified and open power services, and promote the development of strategic emerging industries. As an important energy transmission and allocation platform in China, strong smart grid will bring great benefits to national economic development, energy production and utilization, environmental protection and other aspects from investment and construction to production and operation.

(1) in the power system. The effective instal capacity of that system can be saved; Reduce the total power generation fuel cost of the system; Improve the utilization efficiency of power grid equipment and reduce construction investment; Improve the transmission efficiency of power grid and reduce line loss.

(2) In terms of electricity users. Can realize two-way interaction and provide convenient services; Improve the efficiency of terminal energy utilization and save electricity; Improve power supply reliability and power quality.

(3) In terms of energy conservation and environment. It can improve energy utilization efficiency and bring benefits of energy saving and emission reduction; Promote the development of clean energy and realize the benefits of alternative emission reduction; Improve the overall utilization rate of land resources and save land occupation.

(4) Other aspects. Can drive economic development and stimulate employment; Ensure the safety of energy supply; Changing coal transportation into electricity transportation can improve energy conversion efficiency and reduce transportation pressure. (1) can effectively improve the security and power supply reliability of power system. Using the powerful "self-healing" function of smart grid, faulty components can be isolated accurately and quickly, and the system can be restored to normal state quickly with less human intervention, thus improving the safety and reliability of power supply of the system.

(2) Realize the sustainable development of power grid. Strong smart grid construction can promote the technological innovation of power grid, realize the improvement of technology, equipment, operation and management, so as to meet the demand of power market and promote the scientific and sustainable development of power grid.

(3) Reduce the effective installed capacity. Taking advantage of the huge differences of power load characteristics in different regions of China, through intelligent unified dispatching, network benefits such as peak shifting and valley filling are obtained; At the same time, through the time-of-use electricity price mechanism, users are guided to use electricity in low valleys, and the peak load is reduced, thus reducing the effective installed capacity.

(4) Reduce the fuel cost of system power generation. Building a strong smart grid can meet the intensive development of coal-fired power bases, optimize the layout of power supply in China, and then reduce the cost of fuel transportation; At the same time, by reducing the peak-valley difference of load, the use efficiency of thermal power units can be improved, coal consumption and power generation cost can be reduced.

(5) Improve the utilization efficiency of power grid equipment. First, by improving the power load curve, the peak-valley difference is reduced, and the utilization efficiency of power grid equipment is improved; Secondly, the service life of power grid infrastructure can be extended by exerting self-diagnosis ability.

(6) Reduce line loss. A strong smart grid based on UHV transmission technology will greatly reduce the loss rate in power transmission; Intelligent dispatching system, flexible transmission technology and real-time two-way interaction with users can optimize power flow distribution and reduce line loss; At the same time, the construction and application of distributed power supply also reduce the network loss of long-distance transmission. Building a strong smart grid is of great significance for promoting energy conservation and emission reduction and developing low-carbon economy: ① supporting large-scale access of clean energy units, accelerating the development of clean energy and promoting the optimization and adjustment of China's energy structure; (2) Guide users to arrange electricity consumption time reasonably, reduce peak load, stabilize the output of thermal power units and reduce coal consumption for power generation; ③ Promote the popularization and application of advanced technologies such as UHV, flexible transmission and economic dispatch, reduce the loss rate of transmission network and improve the operation economy of power grid; (4) Realizing the effective interaction between power grid and users, popularizing intelligent electricity utilization technology and improving electricity utilization efficiency; ⑤ Promote the large-scale application of electric vehicles, promote the development of low-carbon economy and realize the benefits of emission reduction.

The development of smart grid concept has three milestones:

The first is the "smart grid" solution proposed by IBM in 2006. IBM's smart grid is mainly to solve the safe operation of power grid and improve its reliability. It can be seen from the white paper "Innovative Operation Management of Building Smart Grid —— New Ideas of China Electric Power Development" published in China that the scheme provides a big framework, and draws a blueprint for related enterprises to improve operational efficiency and reliability and reduce costs by optimizing the management of power production, transmission and retail. It is a marketing strategy of IBM. The second is the energy plan put forward by Obama after he took office. In addition to the announced plans, the United States will also focus on upgrading the power grid system that costs $654.38+02 billion annually in circuit loss and fault maintenance, and establish a unified power grid across four time zones in the United States. Develop smart grid industry, maximize the value and efficiency of American national grid, and gradually realize the unified management of solar energy, wind energy and geothermal energy in the United States; Comprehensively promote distributed energy management and create the highest energy efficiency in the world.

It can be seen that the smart grid of the US government has three purposes. First, the equipment of the American power grid is relatively backward and needs to be updated urgently to improve the reliability of the power grid operation; The second is to pull the United States out of the quagmire of financial crisis through the construction of smart grid; The third is to improve energy efficiency.

The third is the "interactive power grid" proposed by Wu Jiandong, an energy expert in China. Interactive power grid, English for Interactive Smart Grid, covers the meaning of smart grid. Interactive power grid is defined as: on the basis of open and interconnected information mode, by loading system digital equipment and upgrading the power grid network management system, the whole process of power industry such as power generation, transmission, power supply, electricity consumption, power sales by customers, hierarchical power grid dispatching and comprehensive services is intelligentized, informatized and hierarchical interaction management, which is a comprehensive efficiency reform integrating industrial revolution, technological revolution and management revolution. It will rebuild the information loop of power grid, build a new feedback mode for users, promote the overall transformation of power grid to energy-saving infrastructure, improve energy efficiency, reduce customer costs, reduce greenhouse gas emissions, and maximize the value of power grid.