Electric giant with strong strength layout of the global market.Below small make up for you to take stock of ten internationally famous electrical companies.
1ABB(power generation industry)
ABB group is one of the top 500 companies in the world. Headquartered in Zurich, Switzerland, ABB group is composed of two international companies with a history of more than 100 years
2German SIEMENS (strength of metallurgical industry)
SiemensAG, headquartered in Berlin and Munich, is one of the world's largest electrical engineering and electronics companies.
Siemens operates in more than 190 countries and has approximately 600 factories, r&d centers and sales offices worldwide.The company's business is mainly concentrated in the four major salesman areas: industry, energy, infrastructure and urban, medical.Siemens' global operations are run by 13 business groups, including Siemens financial services LLC and Siemens real estate asset management group.Siemens also has a joint venture, Bosch Siemens home appliances group.
3Schneider (strength low voltage distribution)
Schneider electric co., LTD. (SchneiderElectricSA) is one of the world's top 500 enterprises. It was founded by schneider brothers in 1836.Today, headquartered in luet, France, schneider electric is a global leader in energy efficiency management, providing integrated solutions for energy and infrastructure, industry, data centers and networks, buildings and housing markets in more than 100 countries.
4American HONEYWELL (petrochemical industry)
Honeywell was formed in 1999 by the merger of two world-renowned companies, alliedsign and honeywell.Its history dates back to 1885, when an inventor named AlbertButz patented the furnace standard and alarm.He founded Butz electric meter company on April 23, 1886. A few weeks later, he invented a simple yet flexible device called the "damperflapper."In 1904, MarkHoneywel, a young engineer, was trying to perfect the performance of a thermal generator.Two years later, he founded honeywell thermal technologies, which makes generators for heating hot water
5EMERSION (petrochemical industry)
Emerson electric was founded in 1890 as a motor and fan manufacturer in st. Louis, Missouri.In more than 100 years, Emerson has grown from a regional manufacturer to a global powerhouse in technology solutions
6ROCKWELL (USA)
Rockwell automation co., LTD. (NYSE:ROK) is the world's largest industrial automation and information company dedicated to helping customers improve productivity and sustainable development in the world.Rockwell automation, headquartered in Milwaukee, Wisconsin, has operations in more than 80 countries and employs about 22,000 people
7Toshiba (strong power electric drive)
ToshibaCorporation is the largest semiconductor manufacturer in Japan and the second largest integrated motor manufacturer. It is a subsidiary of mitsui group.The company was founded in July 1875, formerly known as Tokyo shipo electric co., LTD., which was merged by Tokyo electric co., ltd. and shipo manufacturing co., LTD in 1939. Its business areas include digital products, electronic components, social basic equipment, household appliances, etc.
8Omron (Japan's strength in cheap electrical products)
Omron group was founded in 1933 when Mr. Ichigashi set up a small factory in Osaka called the ichigashi electric manufacturing institute with only two employees.In the initial stage of the company in addition to the production of timer, later specialized in the production of protective relays.The manufacturing of these two products became omron's starting point.
9Alstom, France (rail transit)
Alstom is a global leader in rail transit, power equipment and power transmission infrastructure and is known for innovative and environmentally friendly technologies.Alstom group has more than 93,500 employees in more than 70 countries and regions.Alstom has been involved in China's construction for more than 50 years, and is a reliable partner in rail transit, power equipment and power transmission infrastructure in China.It has more than 30 entities and business organizations in China and employs about 10,000 people.On October 1, 2013, alstom's largest hydropower equipment production base was officially opened in tianjin.
10General electric
General electric is a global technology and services company headquartered in fairfield, Connecticut.Its history can be traced back to Thomas Edison, who founded the Edison electric light company in 1878.1892 the Edison electric light company and the thomson-houston electric company merged to form the general electric company (GE).
State grid co., ltd. was established on December 29, 2002. It is a wholly state-owned company directly managed by the central government in accordance with the company law.The company takes investment in construction and operation of power grid as its core business, and undertakes the basic mission of ensuring safe, economic, clean and sustainable power supply.
The business area of the company covers 26 [1] provinces (autonomous regions and municipalities directly under the central government), covering more than 88% of the land area, and the population of power supply service exceeds 1.1 billion people.With registered capital of 829.5 billion yuan and total assets of 3.808.83 billion yuan, the company operates steadily in the Philippines, Brazil, Portugal, Australia, Italy, Greece, China (Hong Kong) and other countries and regions.
The company has been awarded the a-level enterprise in the performance assessment of central government for 13 consecutive years. From 2016 to 2017, it has been awarded the 2nd place in fortune global 500 and the 1st place in China top 500. It is the largest public utility enterprise in the world.[2]
In December 2018, the "top 500 world brands 2018" compiled by the world brand lab was revealed, and state grid co., ltd. ranked 30th [3].On July 22, 2019, the fortune global top 500 list was released, and state grid co., ltd. ranked the fifth [4].On September 1, 2019, the list of top 100 leading enterprises in China's strategic emerging industries was released in jinan, with state grid co., ltd. ranking 20th.[5] the list of China's top 500 service enterprises in 2019 was released in jinan, and state grid co., ltd. ranked the first.
Ultrahigh pressure company since its inception, earnestly practiced south network strategy, fulfill the duties given by the southern power grid company, speed up the implementation of the national power to east strategy, ZhuWangJia southern power grid to ensure safe and reliable operation, to achieve greater scope in the area of the southern power grid, larger power resources optimization configuration, promote the south five provinces (area) health, rapid and sustainable economic and social development made outstanding contribution.At the same time, the ultra-high pressure company won the national "May 1" labor award, the central enterprise advanced collective, the national "ankang cup" competition winner enterprise, the national "workers pioneer collective", guangdong civilized unit and other honorary titles, as well as the national invention and other more than 10 scientific and technological innovation achievements.
Asset position editor
By the end of 2009, ultra-high pressure the company's total assets of 41.7 billion yuan, mainly including "eight in four straight" 12 500 kv and above power to east channel, which is 500 kv TianGuang exchange one, two, three, four, 500 kv double your wide communication, ShiXian ac double circuit, a total of eight ac transmission channel, plus or minus 800 kv CSG, plus or minus 500 kv TianGuang dc and dc + 500 kv for your wide one, two, a total of four back dc dc power transmission channel.The power transmission capacity from west to east (transmission terminal) exceeded 20 million kw.Transmission lines of 500 kv and above exceed 15,000 kilometers, and 31 kilometers of submarine cables, among which transmission lines of 500 kv and above account for half of the entire southern power grid.16 500 kv substations (volare, propylite, liping, guests, hechi, pingguo, baise, left, guilin, nanning, LiuDong, wuzhou, congratulation state, huadu, fukuyama, yong), 500 kv and above on the eight (nest, guangzhou, bivouac, zhaoqing, XingRen, baoan, chuxiong, guangzhou east), 500 kv series compensation station 7 (hechi, pingguo, baise, inkstone mountain, guilin, congratulation state, yulin);The transformation capacity is about 18250 mva;Converter capacity 10,300 mw;Series compensation capacity 6411 MB.
Honorary editor
Since its establishment, the company to perform the duties given by the southern power grid company, speed up the implementation of the national power to east strategy, ZhuWangJia southern power grid to ensure safe and reliable operation, to achieve greater scope in the area of the southern power grid, larger power resources optimization configuration, promote the south five provinces (area) health, rapid and sustainable economic and social development made outstanding contribution.At the same time, the ultra-high voltage company won the national "May 1" labor award, the national "ankang cup" competition winner enterprises, the national "pioneer of the workers collective", guangdong civilized unit and other honorary titles, and the national invention and other more than 10 scientific and technological innovation achievements.
Scale and development editors
The company has 11 offices and centers, under which are guangzhou bureau, guiyang bureau, kunming bureau, nanning bureau, tiansheng bridge bureau, liuzhou bureau, wuzhou bureau, baise bureau, qujing bureau, Dali bureau and maintenance test center (guangzhou bureau, guiyang bureau and kunming bureau are super-large enterprises).The units and their branches are distributed in guangdong, guangxi, yunnan, guizhou and hainan.As of July 2009, the company has more than 4300 employees.Among them, 63 percent are undergraduates or above, and 9.8 percent are postgraduates or above.Personnel with intermediate or above titles accounted for 31.9%, employees under 40 years old accounted for 84%.
The prospect for the development of China southern power grid's west-to-east transmission is very broad. During the 11th five-year plan period, guangdong will receive an additional 12.3 million kilowatts of west-to-east transmission, which will form an eight-to-five-direct transmission channel, and send the largest power in guangdong to 22.4 million kilowatts.At the same time, the uhv company will actively participate in the implementation of the "go global" strategy of China southern power grid co., ltd. to expand the network scale of the main grid frame and surrounding regional power grids.During the 12th five-year plan period, the company plans to build xiluodu and nuozhadu hydropower stations to deliver power to guangdong, and the investment in power grid construction will exceed 60 billion yuan.At the end of the 12th five-year plan, the company will deliver 34.8 million kilowatts of electricity from the west to the east, and the annual electricity sales will exceed 200 billion kilowatt-hours.
History editor
South China power grid office
On December 31, 1984, south China power grid office was set up by the former Ministry of Water Resources and electric power to take charge of the planning, networking and coordination of south China power grid in order to develop the hydropower resources of hongshui river and unify the planning and centralized management of power development in guangdong and guangxi.
China southern power co. LTD
In order to further implement the joint power management work of the four provinces (districts) in south China, the state decided to establish China southern power joint venture company in November 1989.On December 7, 1996, the state defined the company as a wholly-owned subsidiary of the state electric power company, continuing to undertake the joint venture of four provinces (regions) and raise funds to develop hongshui river basin and other power resources.To construct transmission backbone network between provincial (regional) power grids to realize the task of sending electricity from the west to the east;Manage interconnected power grids according to law and manage their assets.
National power company southern company
On December 18, 1999, the national power company southern company was established.Guodian southern company is a branch of state electric power company, and it is the dispatching and management command center, market trading and settlement center of state electric power company in China southern power grid.
China southern power grid corporation
On February 16, 2003, approved by China southern power grid corporation, uhv transmission company was formally established.As a branch of China southern power grid co., LTD., uhv transmission company is responsible for the management, operation, maintenance and construction of cross-provincial backbone grids and important contact lines of China southern power grid.
If the current passes through any wire, heat will be generated, leading to the loss of power. Assuming the resistance of the wire is R, the power loss on the wire can be obtained according to the power formula as follows :P loss =I^2*R.It can reduce the power loss of power transmission line.Therefore, there are two ways to reduce power loss :1.2. Reduce the current in the wire.The first method was abandoned because it could not be implemented well, so the second method was adopted.As the power of electric energy can not be arbitrarily reduced, according to the formula: P=UI power = voltage * current.If the power is constant and the voltage is high, the current will be lower.It is known that the only way to decrease the current in the wire without changing the power is to increase the voltage.Therefore, the long-distance transmission of electric energy generally USES the method of high-voltage transmission.Summarize the advantages of high voltage transmission: reduce power loss, increase or decrease transmission distance, reduce wire diameter and reduce material consumption.
The benefits of wireless transmission have a wide range of applications
First of all, wireless power transmission has this feature, which can be used to transfer power from offshore wind farms to our land, and in some areas where natural conditions are relatively difficult and dangerous, we can also use this technology to transfer power.In addition, for electric vehicles, there is no need to unplug the battery, direct wireless transmission charging and so on.
It can be said that its application field is very broad, even can say that in the future, we will not need to connect the mobile phone power transmission, directly can walk on the road for long-distance transmission.
The benefits of wireless transmission save time and effort
Technically, this wireless transmission technology is essentially the same as our radio communication technology.From another point of view, the former is the transmission of energy, while the latter is the transmission of information, it can be said that the transmission medium is different.
Its time-saving and labor-saving performance is shown in many aspects. For example, when the earth is able to operate such wireless transmission, some costs of transmission cable can be saved to a great extent, and some losses caused by resistance in transmission can also be eliminated.
Wireless transmission is made up entirely of coils and has the property of producing a high voltage alternating current that is both high frequency and low current.For this kind of high frequency current can use the air as the transmission of electrical energy over a long distance, so as to reach the use of electrical energy device.
It can be said that this has no adverse effects on the human body.When wireless transmission converts high-voltage current into high-frequency high-voltage current, it can send out power indefinitely!
Once wireless power is available around the world, there will be no need to connect any wires or external devices, just air flowing.You don't have to pay the electricity bill.
China's common voltage grade, from the daily access to 220V civil electricity to 500kV ultra-high voltage, has been widely used for many years of common level.In recent years, China has vigorously promoted uhv transmission, with the voltage level up to 1000kV.So, what are the benefits of uhv transmission?
China has a vast territory and a large population, and its social economy is in a stage of rapid development.The development of uhv transmission technology can not only solve the reverse distribution of energy resources and energy demand in China, regional power grid interconnection and other problems, provide stable and reliable power supply for the sustainable development of China's economy and society, but also provide important technical guarantee for large-scale development and utilization of clean energy, with significant economies of scale.The advantages of uhv transmission are mainly shown in the following aspects:
(1) it can meet the requirements of large-scale, long-distance and high-efficiency power transmission.Reverse distribution characteristics of energy resources and load center in China, most of the energy resources in the west, north, in the load center is concentrated in the Middle East, southeast, large energy base and load center distances of up to 1000 ~ 3000 km, therefore, to ensure a large energy base of intensive development and reliable electric power sent out, need to vigorously develop has a large capacity of transportation, distance, high efficiency, etc of the uhv transmission technology.
(2) conducive to improving environmental quality.Uhv transmission is proposed, which can promote clean energy intensive development and utilization, will China's hydropower in southwest, northwest and north of clean energy such as wind power, solar power, large-scale, long-distance transmission to the central and southeastern load center, to achieve "electricity from afar, is clean electricity", reduce fossil energy consumption and pollutant emissions, has significant environmental benefits.
(3) it is conducive to improving the security of power grid operation.Used "rigidity" of uhv ac/dc hybrid power grid transmission, dc system fault conditions can be greatly reduced by 500 kv power grid current transfer ability insufficiency, the problem such as reactive voltage support the weak, reduce the risk of power blackouts, and can create conditions for the next level gradually hierarchical division of power grid, solve the problem of short circuit current overrun restrictions such as power grid development, improve the flexibility and reliability of the power grid operation.
(4) to improve the overall social benefits.Compared with hv and uhv transmission, uhv transmission can save a lot of transmission corridors, significantly improve the transmission content of the width of each corridor, save precious land resources, and improve the overall utilization efficiency of land resources.
So, the transmission and transformation facilities with such high voltage, does it count as "large electromagnetic radiation facilities"?
The answer is no.This is because the original circular of the state environmental protection administration [2008] no. 664 "reply on the definition of 'large-scale electromagnetic radiation emission facilities' in the measures for the management of environmental protection of electromagnetic radiation" clearly defines large-scale electromagnetic radiation facilities as follows:
According to the second paragraph of article 20 of the measures for the administration of environmental protection of electromagnetic radiation, "sensitive buildings such as residential houses and kindergartens shall not be built in the planning restricted areas delimited according to environmental protection and urban planning around the concentrated use of large electromagnetic radiation emission facilities or high-frequency equipment."The "centralized use of large electromagnetic radiation emission facilities" mentioned in this paragraph refers to the following transmission facilities to be built and used within the same land area: (1) a TV transmission tower with a total power of more than 200kW;(2) the total power of more than 1000kW radio stations, stations.
It can be seen that the voltage level of power transmission and transformation facilities is high again, and it is still not large electromagnetic radiation facilities, please rest assured that electricity.
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