变电站-外文翻译-外文文献-英文文献-变电站的综合概述.pdf
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1、英文翻译A comprehensive overview of substationsAlong with the economic development and the modern industry developments ofquick rising,the design of the power supply system become more and more completelyand system。Because the quickly increase electricity of factories,it also increasesseriously to the d
2、ependable index of the economic condition,power supply inquantity。Therefore they need the higher and more perfect request to the power supply.Whether Design reasonable,not only affect directly the base investment and circulatethe expenses with have the metal depletion in colour metal,but also will r
3、eflect thedependable in power supply and the safe in many facts。In a word,it is close withthe economic performance and the safety of the people.The substation is animportance part of the electric power system,it is consisted of the electric appliancesequipments and the Transmission and the Distribut
4、ion.It obtains the electric powerfrom the electric power system,through its function of transformation and assign,transport and safety。Then transport the power to every place with safe,dependable,and economical.As an important part of powers transport and control,thetransformer substation must chang
5、e the mode of the traditional design and control,thencan adapt to the modern electric power system,the development of modern industryand the of trend of the society life。Electric power industry is one of the foundations of national industry andnational economic development to industry,it is a coal,o
6、il,natural gas,hydropower,nuclear power,wind power and other energy conversion into electricalenergy of the secondary energy industry,it for the other departmentsof the nationaleconomy fast and stable development of the provision of adequate power,and its levelof development is a reflection of the c
7、ountrys economic development an importantindicator of the level.As the power in the industry and the importance of the nationaleconomy,electricity transmission and distribution of electric energy used in these areasis an indispensable component.。Therefore,power transmission and distribution iscritic
8、al。Substation is to enable superior power plant power plants or power afteradjustments to the lower load of books is an important part of power transmission.Operation of its functions,the capacity of a direct impact on the size of the lower loadpower,thereby affecting the industrial production and p
9、ower consumption.Substationsystem if a link failure,the system will protect the part of action.May result in poweroutages and so on,to the production and living a great disadvantage。Therefore,thesubstation in the electric power system for the protection of electricity reliability,1sensitivity and ot
10、her indicators。Powerplantsandsubstationsareconnecteduserlinkinthemiddle,transformation and distribution of electric energy to play the role。According to thedifferent tasks substation can be divided into step-up transformer stepdowntransformer substation and two broad categories。Stepup substation bui
11、lt on thegeneral power plant,the general step-down transformer near the load center built onthe low.Voltage can also be divided according to medium voltage substation(60 kVand below),highvoltage substations(110 220 kV),EHV Substation(330 765 kV)and Ultra High Voltage Substation(1000 kV and above).In
12、 electric powersystem according to their status as a hub substation can be divided into the middlesubstation substations and terminals.This requires a substation part of economicrationality,the second part of safe and reliable,the only way to the normal operationof substation work services for the n
13、ational economy.There are step-up transformerstepdown transformer substation and two broad categories。Substations have beenequipped with various protection devices,these devices are based on lowershortcircuit load to a maximum load conditions,such as configuration settings and,therefore,in the event
14、 of the failure was similar to the specific circumstances under tojudge by the system should automatically trip protection,and now the protection ofthe whole trip has been a very short time,the lifting of the fault,the system willautomatically reclosing devices and the gateway to restore power quick
15、ly.This is toprotect the lower the load is very favorable.This will not only protect the safety of theload equipment is in favor of extending the service life and reduce equipmentinvestment,and improved reliability of electricity supply,which is to improve theefficiency of industrial and agricultura
16、l production is very effective。Substations havebeen equipped with various protection devices,these devices are based on lowershort-circuit load to a maximum load conditions,such as configuration settings and,therefore,in the event of the failure was similar to the specific circumstances under tojudg
17、e by the system should automatically trip protection,and now the protection of thewhole trip has been a very short time,the lifting of the fault,the system willautomatically reclosing devices and the gateway to restore power quickly.This is toprotect the lower the load is very favorable。This will no
18、t only protect the safety ofthe load equipment is in favor of extending the service life and reduce equipmentinvestment,and improved reliability of electricity supply,which is to improve theefficiency of industrial and agricultural production is very effective.Increase in theefficiency of industrial
19、 products means lower product costs,increase market2competitiveness,which will enable enterprises to increase for the national economyand make a greater contribution to development。Electricity supply reliability andother fields,can improve peoples quality of life,improve their living conditions.Anal
20、yse change to give or get an electric shock a mission for carrying andcustomers carries etc。circumstance,choose the address,make good use ofcustomer data proceed then carry calculation,ascertain the correct equipment of thecustomer.At the same time following the choice of every kind of transformer,t
21、henmake sure the line method of the transformer substation,then calculate theshort-circuit electric current,choosing to send together with the electric wire methodand the style of the wire,then proceeding the calculation of short-circuit electriccurrent.This first step of design included:(1)ascertai
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