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• Time of issue:2021-03-29
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(Summary description)Smart grid: energy transformation requires more intelligent power grid construction. During the 14th five year plan, the investment scale of the grid exceeds 6 trillion, and the smart grid meets the market space of hundreds of billion.
During the 13th Five Year Plan period (2016-2020), China's grid investment was 2.6 trillion, which was nearly 60% higher than that of 1.6 trillion in the 12th Five Year Plan period. The scale of China's power system is expanding.
According to the chairman of the State Grid, under the background of carbon neutral energy transformation, the investment scale of power grid in China during the 14th Five Year Plan period may exceed 6 trillion, and the market space is broad. Facing the huge scale power system, it is necessary to improve the intelligence of the power system, so as to make the power system more efficient.
Smart grid is to take UHV grid as backbone grid, use advanced technology to build a power grid system based on information. Its essence is to solve the related problems existing in energy supply side by intelligent construction of power transmission and distribution links.
Specifically, smart grid has three tasks:
1) Ensure that the energy allocation work is completed smoothly. Smart grid needs to transport clean energy (photovoltaic, wind power, etc.) in the west to the East and central load center, and carry out intelligent adjustment and configuration to complete the large-scale and efficient consumption of clean energy.
2) To ensure the safety and stability of energy supply. After the clean energy is incorporated into the power system in a large range, the smart grid should adjust the peak load according to the power consumption in different regions and different times to ensure the power supply of the whole country.
3) Reduce the loss in the process of energy supply. The energy saving of distribution network can improve the distribution of power grid resources and reduce unnecessary losses.
From 2016 to 2020, the construction of smart grid has entered a high-speed development period, with a total planned investment of RMB 1.4 trillion, of which 175billion yuan is invested in intelligent planning, accounting for 12.5%. During the 14th five year plan, the industrial scale of smart grid will reach a trillion levels, with a compound growth rate of about 20%.
Energy saving of distribution network: help the power sector to neutralize carbon, with an annual market space of more than 40 billion.
The power industry is the main carbon emission source in China, accounting for more than 50% in 2018, and it is the key emission reduction department to achieve the carbon neutralization target. In addition, the target of power sector emission reduction is more than 40% of the energy activities, which is the most important task in the process of carbon neutralization.
The energy saving of distribution network can help the power department to decarbonize deeply: energy saving of distribution network can reduce the energy-saving loss of distribution network, and provide energy saving transformation and comprehensive energy efficiency treatment solution; It can effectively solve the problems of high line loss rate (the more can reduce 30%), and the greater the reactive power loss.
Therefore, in the background of carbon neutralization, the energy saving of distribution network can effectively help the distribution network to save energy with low loss and help the power department to decarbonize in depth.
According to the current development progress, China's line loss rate in 2019 is 5.9%, which is still a gap with the international leading level: the average line loss rate in Japan, Korea and Germany in 2012 is 4.12%. This means that there is still a large space for energy conservation of domestic distribution network.