It is even more critical to start “green power” in the era of energy saving for all people

Studies have shown that in our country, a one percentage point increase in the utilization rate of electricity, the coal consumption of coal-fired generating units can be reduced by approximately 2.3 g/kWh. Electricity is a high-quality, efficient, and clean secondary energy source. "Relying coal as electricity, replacing oil with electricity, and electricity from a distance" is an important means to optimize the allocation of energy resources and promote economic development.

Electric energy substitute "replacement" green score

At the beginning of this year, there was a large area of ​​smog across the country, and people’s daily production and life were affected to varying degrees. A number of experts have said that the haze problem has to do with China's economic development methods, especially related to energy development.

Specifically, the causes of haze mainly include automobile exhaust, exhaust gas from heating coal in winter, and exhaust gas from industrial production. Therefore, to reduce the burning and use of oil products and coal, the implementation of “replacement of coal by electricity, electricity by oil, and electricity from afar” is the key to solving the problem of smog.

Electricity is a high-quality, efficient and clean secondary energy source that can widely replace fossil energy in end-use energy consumption. Some studies have shown that the increase in the proportion of electric energy in terminal energy consumption also means a decrease in energy consumption per unit of GDP. At present, China has become the world's largest energy consumer. Changing the balance of power development methods on the ground and over-reliance on coal energy utilization are the key to solving environmental problems. Accelerating the construction of a strong and smart grid with UHV as the backbone grid, promoting the optimization of power resources in a wide range, and focusing on the use of clean energy will be an effective measure to deal with haze and an important means to optimize the allocation of energy resources and promote economic development.

On April 23rd, the State Grid Corporation of China participated in the 2013 International Public Utilities and Energy Conference with the theme of “Revolution in Energy Production and Consumption” and stated at the meeting that the State Grid Corporation of China has determined the development goals and accelerated the construction The UHV power grid is a strong smart grid with coordinated development of backbone grids and all levels of power grids. The construction of the "Three China" UHV synchronous power grid is the core, and the northwest and northeast power grids are the sending end. The development of AC and DC is coordinated. The grids are strong and safe. High-efficiency, economical and environmentally-friendly modern power grid system to realize the optimization of energy allocation in the country.

Practice has proved that with the improvement of electrification level and energy substitution as the main direction, advancement of terminal energy alternatives and reduction of direct combustion of coal will help ease the pressure of environmental protection. The electric car that is currently eagerly concerned by consumers is a typical application of electricity and oil. According to estimates by professionals, electric vehicles are zero emissions during the driving process, and the pollution emission from the coal-fired power plants converted from the consumed electricity amount is obviously less than the pollution emissions from the exhaust gas from the same mileage fossil vehicles.

Efficient use of new energy is one of the effective means to practice energy-saving and low-carbon. Smart grids play an important role in the process of new energy integration and consumption. It is expected that by 2020, the State Grid Corporation of China can accumulatively reduce carbon dioxide emissions by 10 billion tons through the construction and operation of a strong smart grid and the promotion of the development of a low-carbon economy.

New energy and grid transmission more "green"

In the process of new energy use, the grid plays an important role in acceptance and delivery. The State Grid Corporation of China has made great efforts for the integration of new energy sources. It has invested a great deal of energy in terms of technology, capital, and personnel training, and has handed in a beautiful answer sheet for the integration of new energy sources.

In June 2012, China's wind power grid-connected capacity replaced the United States as the world's first. By the end of the year, the total installed capacity of wind power grids in China had reached 63 million kilowatts; the annual wind power generation capacity exceeded 100 billion kwh, accounting for 2% of the country's total electricity generation. Wind power, the clean energy source, has become China's third largest power source. Among them, the State Grid Corporation of China has 56.76 million kilowatts of grid-connected wind power capacity within the scope of dispatch, an average annual growth rate of 79% since the “Eleventh Five-Year Plan” period, and an annual power generation capacity of more than 90 billion kwh, an average annual growth rate since the “Eleventh Five-Year Plan” period. 96%. The National Grid has become the world's largest connected wind power grid and the fastest growing grid of wind and solar power.

At present, the distributed photovoltaic industry is developing rapidly. Since the State Grid Corporation of China released its opinion on supporting distributed energy grid-connected, distributed photovoltaic grid-connected business volume has been continuously increasing throughout the country. According to the latest data from the Marketing Department of the State Grid Corporation of China, from November 1, 2012 to June 7, 2013, the State Grid Corporation of China received a total of 11,128 consulting services related to distributed power grid interconnection, and 604 business units reporting installations, with a power generation capacity of 1.204 million. Kilowatts; currently 79 households have completed grid connection, with a grid capacity of 87,500 kilowatts, and cumulative power generation of 22,985.4 kilowatt-hours.

Smart grids play an important role in the process of new energy integration and consumption. It allows smooth renewable energy such as wind energy and photovoltaics to enter the network, reducing the impact on the large power grid and allowing the grid to accept and deliver more “green electricity”.

Xie Kechang, vice president of the Chinese Academy of Engineering, commented on the role of smart grids in new energy sources: A strong smart grid with UHV as the backbone grid can eliminate clean energy and realize coordinated development of wind, light, water, and fire, and joint transportation. To achieve scientific deployment of resources, to achieve multi-energy complementary configuration, supply and demand coordinated operation. In addition, the smart grid can improve the efficiency of comprehensive energy utilization, address the uneven distribution of energy supply and demand, effectively reduce PM2.5 pollution, and achieve remarkable results in air pollution control.

In addition, the State Grid Corporation of China has given full play to the platform role of the power grid and improved the efficiency of clean energy use. Such as the use of energy-saving generation scheduling, optimization of power trading, etc., to absorb more clean hydropower. During the “Eleventh Five-Year Plan” period, the State Grid Corporation of China dispatched Sichuan Electric Power to East China to absorb 12 billion kilowatt-hours of Sichuan hydropower during the period, equivalent to saving 4 million tons of standard coal and 10.4 million tons of carbon dioxide emissions.

New technologies and new processes have been developed and applied in power grid planning and construction, operation and management, etc. This has made remarkable achievements in energy saving in power grids. The State Grid Corporation of China also promotes new energy-saving technologies to electricity customers, publicizes energy-saving concepts among electricity customers, and promotes energy-saving and emission-reduction throughout the society.

Explore new technologies and new processes

Promoting Social Energy Saving and Emission Reduction Facing ever-increasing pressures for energy conservation and emission reduction, the State Grid Corporation of China continues to explore and develop new technologies and new technologies, and promotes them to the society. This has effectively and effectively improved the energy efficiency of power grids, reduced power grid losses, and allowed power grids to save energy. More efficient, but also promote social energy-saving emission reduction.

Through the energy conservation service companies and energy efficiency service activity groups, the State Grid Corporation actively promotes new energy-saving technologies to customers within the supply scope. These energy-saving service companies and energy efficiency service activity groups have advanced technology and “enter the enterprise and prescribe medicines” to publicize energy-saving concepts, help customers implement energy-saving reforms, and effectively promote energy-saving and emission-reduction work in the entire society.

According to the data, during the “11th Five-Year Plan” period, the State Grid Corporation of China has promoted 221,000 energy-saving and environmental protection technology projects such as green lighting, high-efficiency motors, reactive power compensation devices, and customer-friendly energy-saving transformers. The newly-added heat pump has an area of ​​75.5 million square meters of heat and cooling. The number of energy substitution technologies such as electric heating and agricultural electric power irrigation was 15,800, and the capacity of electric heat storage, cold air conditioning and air conditioning was approximately 5.22 million kilowatts, and a total of 661 batches of energy-efficient power plant projects were implemented. These efforts have played an important role in promoting energy conservation and emission reduction.

At the same time, relying on technological progress, the State Grid Corporation has made remarkable achievements in reducing line losses. According to statistics, at the end of the "Eleventh Five-Year Plan," the State Grid Corporation's line loss rate was lower than the SASAC assessment target value of 0.32 percentage points; in 2011, the line loss rate further decreased, lower than the "12th Five-Year" SASAC assessment target value of 0.27 Percentile point, and lower than the United States, the United Kingdom, France, Russia and other countries, the line loss rate has reached the international upper middle class. Through strengthening line loss management, the State Grid Corporation saved a total of 51.8 billion kWh of electricity in 2006~2011, equivalent to saving 17.27 million tons of standard coal and 42.92 million tons of carbon dioxide emissions. In 2012, the State Grid Corporation's line loss rate decreased by 0.03 percentage points, saving 1,050 million kilowatt hours of electricity.

Recently, State Grid Energy Service Co., Ltd. has become a state-level energy-saving filing company. The continuous improvement of the energy-saving service system will continue to guide and stimulate more social enterprises to participate in the power demand side management, learn the knowledge of the electric power demand side management, promote the promotion and application of the electric power demand side management technology and demonstration engineering experience, and reduce the energy consumption of production. The whole society saves energy and reduces emissions.

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