Strategic shift from “strong grid†to “strong smart gridâ€
At the end of 2002, China's power system was separated from the factory network. At that time, due to the rapid growth of power demand brought about by the rapid economic development, China is experiencing years of continuous power shortage. In order to alleviate the power shortage, a large number of power projects have been launched, and more than 70% of the industry's fixed investment flows to power plant construction. The long-term investment trend of “re-issuing light supply and no use†has led to a serious problem of lag in power grid development, which has severely restricted the supply of power across regions and the timely delivery of power, which has become a major bottleneck affecting the overall power supply capacity of the country. Under this background, State Grid Corporation comprehensively analyzed the situation faced by China's power grid development, and clearly proposed to build a strong national grid with UHV grid as the backbone grid and coordinated development of all levels of power grids. This major strategy of “building a strong grid†has played an important role in the development of power grids in recent years. With the construction of inter-regional interconnection projects such as the Three Gorges Power Transmission and Transformation Project and UHV Engineering, in addition to Taiwan and other regions, the national networking pattern has taken shape. The national network has strongly supported the implementation of the country's western development and the West-East Power Transmission Strategy, which has greatly eased the power shortage in some areas and promoted the overall investment efficiency of the power industry.
Building a strong smart grid is a strategic choice to adapt to the new situation of China's power grid development. It is another major change and innovation in the development mode of the power grid after the UHV has made a major breakthrough, and has realized the strategy from “strong grid†to “strong smart gridâ€. change. It is reflected in the following aspects:
First, the strong smart grid is a holistic and systematic approach to objectively describe the basic characteristics of modern power grid development. A strong smart grid is a system concept that covers a complete intelligent system in all areas of “generation, transmission, substation, distribution, electricity, dispatch, communication informationâ€. “Strong†and “smart†are the two basic development requirements of modern power grids. “Strong†and “smart†are mutually intertwined and interdependent. “Strong†is the foundation. The power grid needs to have a strong grid structure, strong and safe power transmission and supply capacity, to meet the needs of large-scale resource optimization configuration. "Intelligence" is the key. The new technologies are highly integrated, and the characteristics of informationization, automation and interaction are obvious. It is an inevitable trend to meet the diversification of power services.
Second, "strong" and "smart" are equal, and it is a strategic choice based on the actual development of China's power grid. The basic requirements for providing users with sufficient power and more intelligent power services are two aspects that must be equalized in power grid construction. The two should be built simultaneously and simultaneously, and they are indispensable. Different from the developed countries in Europe and the United States where the scale of the power grid has been basically stable, the development of China's power grid must simultaneously solve the volume expansion and qualitative leap. This determines that the development of China's smart grid should adhere to the synergy of smart grid construction and strong grid construction, that is, the construction of a strong grid and intelligent system organically unified, the two support each other and complement each other. At the same time, under the background of the common development trend of the smart grid, this is also the only way for the independent innovation development and industrial upgrading of China's power industry.
The third is the inheritance and development based on the existing development results, the system enhances the intelligent level of the power grid, and fosters new business and service models. Building a strong smart grid is based on the existing power grid development and technology accumulation, giving full play to the advantages of technology, system and management. In accordance with the principle of integrity, the system will improve the intelligent level of the power grid and promote the full play of the overall efficiency of the power grid infrastructure. The integration of applications, including information and intelligent control technologies, will bring new value-added services such as information and communication services, energy efficiency and demand side management. At the same time, the overall level of smart grid improvement, the variety of users, the richer business content, and the increased market competitiveness will also promote the further enrichment and improvement of service channels, service content and service methods.
A comprehensive view of the benefits of a strong smart grid
According to the information revealed in the 2012 China Smart Grid Construction International Forum held in Beijing in March, the construction of a strong smart grid will generate huge economic and social benefits. Below we explain the benefits of a strong smart grid through several different perspectives.
Compared with the traditional power grid, the smart grid can bring about 200 billion yuan in environmental benefits, power consumption benefits, power grid benefits, power generation benefits and other social benefits.
Global resources, environment, and economic issues are becoming more and more prominent. Renewable energy is developing rapidly. Countries around the world are faced with the problem of how to access and fully utilize renewable energy. They need to respond with intelligent technologies and means.
The research and practice in Europe and the United States shows that smart grid construction can bring expected benefits to power companies, users and society. Actively developing smart grids has become a realistic choice for international power development.
In general, a strong smart grid has many functions to promote optimal allocation of energy resources, promote clean energy development, and guide energy production and consumption layout. As far as China is concerned, the above functions and benefits are mainly brought about by the four major measures to develop a strong smart grid.
Measure 1: Increase the construction of coal-fired power bases, accelerate the development of UHV trans-regional power transmission, transform the traditional power development model based on “local balanceâ€, and build a “di-regional transmissionâ€-based power development model to realize coal transportation and transmission. And take it.
The benefits that can be achieved include: rational division of coal transportation and transmission, improvement of coal comprehensive development and utilization efficiency; optimization of the use of China's environmental resources, reducing environmental losses; improving energy transmission economy, reducing power supply costs; saving energy transmission channel footprint, Improve land use efficiency and so on.
Through the overall planning and construction of UHV grids and large-scale pit-mouth power plants in the west and north, the central and eastern regions can reduce sulfur dioxide emissions by 550,000 tons per year in 2020, reducing environmental losses by 4.5 billion yuan. Through the integration of coal and electricity, the coal mines and power plants can be complemented and comprehensively utilized in the allocation of water, coal, ash, land and other resources, greatly reducing the damage of coal mining to the ecological environment.
Measure 2: Accelerate the construction of a clean energy power generation base, effectively utilize the UHV transmission channel of the coal power base, and promote the joint transportation of wind and light.
The benefits that this measure can achieve include: vigorously promoting the development of clean energy scale; promoting optimization of power supply structure, reducing greenhouse gas emissions; improving utilization efficiency of transmission channels and reducing long-distance transportation costs of wind power.
Take the development of clean energy as an example. Intelligent technologies such as wind power prediction, energy storage, and wind and light coordinated control can optimize system operation efficiency and improve system operation economy and clean energy consumption. By 2020, compared with the traditional power grid, the cross-regional consumption of wind power through the strong smart grid can increase the scale of wind power development in China by about 54 million kilowatts, replace the fossil energy consumption by 34 million tons of standard coal, and reduce carbon dioxide and sulfur dioxide. Nitrogen oxides were 94 million tons, 382,000 tons, and 24,000 tons.
Measure 3: Simultaneously strengthen the construction of peaking power supply such as transmission and reception network and pumped storage.
This measure can be realized: to provide a strong grid platform for large-scale nuclear power access; to increase wind power consumption capacity, to achieve 150 million kilowatts of wind power development scale in 2020; to improve the overall efficiency of power systems, reduce the effective installation of the system; Sexuality and reliability.
The “Sanhua†receiving power grid can exert significant peak and peaking benefits, reduce peak load and reduce grid load and valley difference. In the case of large-scale acceptance of hydropower, wind power and coal power outside the zone, the capacity of the thermal power generator assembly machine can be reduced by rationally configuring the system to adjust the peak power supply. It is estimated that by 2020, the development of a strong smart grid will reduce the installed capacity of coal-fired power in China by about 63 million kilowatts.
Measure 4: Accelerate the intelligent construction of power grids at all levels, and basically build a strong smart grid.
The benefits that this measure can achieve include: improving the economics of power system operation; improving the utilization efficiency of power grid equipment, reducing investment in power grid construction; improving the energy efficiency of end-user equipment. By 2020, compared with the traditional power grid, the user's electricity consumption will be 45.1 billion yuan. kWh; promote new product development and new service market formation; improve power supply reliability and reduce power outage losses.
It is estimated that by 2020, China's electricity load will be reduced by about 49 million kilowatts compared with the traditional power grid, which can reduce the investment in power grid construction by about 18 billion yuan. In the case of a strong smart grid, the smart grid can bring about the environmental benefits of quantitative assessment compared with the traditional grid. The total benefit of electricity, power grid, power generation and other social benefits is about 200 billion yuan.
UHV viewing angle: UHV resource optimization configuration benefits appear
As of the end of October last year, China's first UHV transmission line "Jindongnan-Nanyang-Jingmen 1000 kV UHV test demonstration project" has accumulated 25.7 billion kWh of electricity. The line has become an important energy transmission channel in the north-south direction of China. In fact, the measured transmission loss rate is only 1.7%, which is about 1/3 of the 500 kV project. The energy saving and consumption reduction effect is very significant.
China's vast territory, primary energy distribution and regional economic development is extremely uneven, which determines the need for large-scale cross-regional deployment of energy resources, the need to optimize the allocation across the country, the construction of cross-regional power grids has become an important way to achieve this goal. With the construction of long-distance transmission lines and the development of a strong smart grid with a UHV grid as the backbone grid, the scale of trans-regional transmission continues to grow rapidly, and the benefits of optimizing the allocation of power resources in a wider range are increasingly apparent.
UHV transmission trading is the most important part of the trans-regional transmission trading system. As a concentrated manifestation of cross-regional power transmission, UHV transmission plays an increasingly important role in optimizing the allocation of energy resources and promoting the construction of large energy bases.
From the perspective of resource optimization and configuration, as China's energy strategy moves westward, the distance between large energy bases and energy consumption centers is getting farther and farther, and the scale of energy transmission will also become larger and larger. On the basis of traditional railway, highway, shipping, pipeline and other modes of transportation, improving the transportation capacity of the power grid is also an option to ease the transportation pressure.
In April this year, State Grid Corporation re-launched the “Twelfth Five-Year Plan for UHV Power Gridâ€, and proposed to promote the construction of UHV into the “Twelfth Five-Year Plan†of the national grid. If this is successful, the UHV construction process will undoubtedly be further accelerated, and the power “highway†will usher in new development.
Peaking perspective: promoting pumped storage can promote new energy development
As a peaking power supply, pumped storage power stations can meet the requirements of smart grids to the greatest extent in promoting the development of new energy such as wind power, improving the safe and stable operation of power systems, and energy conservation and emission reduction.
China's "Twelfth Five-Year Plan" clearly states that "reliant on advanced technologies such as information, control and energy storage, promote the construction of smart grids, and build a safe, stable, economic and clean modern energy system." It has become an important part of China's power and energy development to develop energy storage devices, build smart grids, enhance the grid's ability to optimize the allocation of energy resources, and solve the problems brought about by the rapid development of clean energy such as wind power.
Pumped storage is the most mature and economical large-scale energy storage method of the current technology. It has rapid start-stop, flexible operation and strong tracking load capacity, which can meet the requirements of smart grid construction. Pumped storage has become an important part of China's smart grid construction.
The pumped storage power station is a power station with energy storage function, which combines the characteristics of power generation and energy storage. It solves the contradiction that electric energy is not easy to store, and can effectively adjust the dynamic balance of power supply and supply.
The economic and social benefits brought by pumped storage are mainly reflected in three aspects:
First, ensure the safe and stable operation of the power system and improve the quality of power supply. China's power supply structure is dominated by coal-fired power, and there is a shortage of peaking power supplies such as gas. The peaking range of coal-fired power units is relatively small, and the peak-shaving capability is relatively poor, which cannot guarantee rapid adjustment under power system accidents.
Pumped storage power stations can quickly adapt to load changes, from pumping conditions to full load operation is generally only 2 to 3 minutes, can quickly adjust the output in a wide range. The pumped storage power station can effectively ensure and improve the stability of the grid operating frequency and voltage quality, improve the safe and stable operation level of the power system, and meet the requirements of power users for power quality. For example, the Beijing Shisanling Pumped Storage Power Station is known as “the last match that lights up Beijingâ€.
In 2011, nine pumped-storage power stations, such as the Ming Tombs, Panjiakou, Taishan and Zhanghewan, which were owned by State Grid Xinyuan Holdings Co., Ltd., started a total of 15,900 times, which played an important role in the safe and stable operation of the power system.
Second, in conjunction with the operation of thermal power units, energy conservation and emission reduction of power systems can be realized. Pumped storage can reduce the number of thermal power units involved in peaking start and stop, improve the load level of thermal power units, increase the load rate of thermal power units and ensure their operation in high efficiency areas, reducing fuel consumption of power systems.
According to estimates, Taian Pumped Storage Power Station has installed 1 million kilowatts. In theory, peaking and filling valleys can save 240,000 tons of coal, reduce sulfur dioxide emissions by 15,000 tons, emit 2,475 tons of nitrogen oxides, emit 7 tons of soot, and emit 55 tons of carbon monoxide. The fuel consumption is 133,000 tons, saving investment and operating expenses of 50.1 million yuan per year.
Third, improve the ability to absorb renewable energy such as wind power. Power system construction of a pumped-storage power station of appropriate scale can fully utilize the complementarity of pumped storage and wind power operation. Pumped storage power station can smooth the randomness and volatility of wind power and solar power generation, improve the economic efficiency of transmission lines, balance the imbalance of wind power generation, reduce the impact of wind power on the power grid, and solve the problem of current wind power transmission. The actual problem.
The operation practice of pumped storage power stations in China shows that pumped storage can meet the requirements of smart grid and make it a smart grid in the promotion of new energy development such as wind power, improving the safe and stable operation of power systems, and energy conservation and emission reduction of power systems. The most mature and economical adjustment tool of the technology. Similarly, building a smart grid and building a safe, stable, economic, and clean modern energy system provides a broad space and a rare opportunity for the development of pumped storage.
Equipment perspective: Smart grid construction will drive the equipment industry to improve
The new power grid, represented by the smart grid, has spawned new technologies and business models, creating 30 to 50 times the market space of the Internet, providing a rare opportunity for equipment companies to develop.
China will build a strong and smart grid that is strong, reliable, cost-effective, clean and environmentally friendly, transparent, open, friendly and interactive. The strong smart grid covers six major links of power generation, transmission, substation, power distribution, power consumption, and dispatching, as well as communication and information platforms, involving new energy, software, energy storage, communications, automation, electric vehicles, advanced sensors, and smart appliances. And other fields.
Building a strong smart grid, equipment is critical. The new power grid, represented by the smart grid, will spawn new technologies and business models, creating an industry revolution of 30 to 50 times the market space of the Internet, which will provide a rare opportunity for equipment companies to develop.
As far as power equipment is concerned, the huge investment in smart grid construction in China has provided a powerful technological transformation power for power equipment manufacturers. By 2020, the total investment of the State Grid Corporation in smart grid construction is expected to exceed 4 trillion yuan, and investment in power equipment accounts for about 40% of the total investment of the power grid, which will certainly provide strong financial support and development momentum for the development of smart devices. At the same time, many equipment manufacturers keep up with the demand of the smart grid market, accelerate independent innovation, seize market opportunities, greatly accelerate the upgrading of power equipment development technology and industrial transformation, and enhance the competitive advantages of the industry and enterprises.
As a leading enterprise in China's power equipment industry, China Power Technology Equipment Co., Ltd. has invested a lot of manpower and resources in recent years, through intelligent substation technology, urban distribution network automation technology, wind power and photovoltaic power generation technology, electric vehicle charging and replacing power station technology and Research on the combination of secondary equipment and other aspects has formed a series of key technologies with completely independent intellectual property rights. Its product development and development process is enough to prove the important role of smart grid construction in upgrading the technical strength of equipment manufacturing.
In order to promote long-distance transmission, in order to solve the large-scale access to power grids for long-distance transmission, new energy and clean energy, the power equipment industry is actively carrying out research on UHV DC transmission and flexible AC transmission equipment technology, and will be power electronics technology and modern control technology. Combined, through continuous adjustment and control of power system parameters, the transmission loss is greatly reduced, the transmission capacity of the transmission line is improved, and the stability level of the power system is ensured.
In promoting the development of new energy, the power equipment industry actively participated in the implementation of the new energy strategy, and entered the green environmental protection fields such as wind energy and solar photovoltaic power generation. A number of wind turbines and photovoltaic products with “grid-friendly†characteristics were successively launched, realizing new Energy is stable, reliable and safe.
In addition, in the intelligent substation, urban distribution network, electric vehicle charging and replacement station, microgrid technology and smart meter product development, the equipment manufacturing industry has also carried out many research. The above research results enable the smart grid to enhance the resilience to disturbances, attacks and natural disasters, reduce the risk of large-scale outages, improve the reliability, safety and operational efficiency of the grid; dynamically optimize network resources through intelligent scheduling and monitoring. And operation; realize two-way interaction between power grid and users; can carry out intelligent management of distributed power supply, electric vehicle, energy storage components and marketing business decision-making, realize power consumption information collection, intelligent monitoring, intelligent measurement and so on.
Shenzhen Chengrong Technology Co.ltd is a high-quality enterprise specializing in metal stamping and CNC production for 12 years. The company mainly aims at the R&D, production and sales of Notebook Laptop Stands and Mobile Phone Stands. From the mold design and processing to machining and product surface oxidation, spraying treatment etc ,integration can fully meet the various processing needs of customers. Have a complete and scientific quality management system, strength and product quality are recognized and trusted by the industry, to meet changing economic and social needs .
Phone Holder Usa,Phone Holder For Car,Iphone 12 Pro Max Stand,Iphone 12 Charging Base
Shenzhen ChengRong Technology Co.,Ltd. , https://www.dglaptopstandsupplier.com