《变电站-外文翻译-外文文献-英文文献-变电站的综合概述.pdf》由会员分享，可在线阅读，更多相关《变电站-外文翻译-外文文献-英文文献-变电站的综合概述.pdf（7页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
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
22、n the total project（2)loadanalysis(3)the calculation of the shortcircuit electric current(4)the design of anelectric shock the system design to connect with system and the choice of line project（5）the choice and the settle of the protective facility（6)the contents to defend thethunder and protection
23、 of connect the earth.Along with the high and quickdevelopment of electric power technique，electric power system then can change fromthe generate of the electricity to the supply the power.Design the task this time is aim at intensity of mastering of every subjectknowledge of this speciality reflect
24、ing,and of test this specialitys study result.first，analyze the tend of load department according to all parameter of load about systemand circuit on task book。It expounds the necessity to this situation from the rspect ofincreasing load.Then through to the generalization of planning to build the tr
25、ansformersubstation and the analysis of the load materials,safe，economy and dependability areconsidered,has confirmed the mainly wiring form of 10kV。Calculated and suppliedpower in the range and confirmed TV stations number of the main voltage transformerthrough load finally,capacity and type，capaci
26、ty and type of using the voltagetransformer stand surely at the same time，finally,the result of calculation ofcalculating that and short out according to the electric current of largest lasting job,make the circuit to protect，the voltage transformer is protected,the bus bar isprotected,prevent the t
27、hunder from protecting。This graduation project take the 10kV transformer substation as the main designobject，this 10kV transformer substation is the local important transformer substation，is the electrical power system 10kV voltage rank important part.This transformersubstation is equipped with 2 ma
28、in transformers，in the station the host wiring dividesinto 10kV，and 0.4 kV two voltages ranks.This design first chapter is an introduction，3mainly elaborated the transformer substation in electrical power system status.Designsthe transformer substation the principle and the goal as well as the trans
29、formersubstation basic situation。Second chapter is shoulders the computation and thetransformer choice，carries on the load computation according to the knowntransformer substation load material to the transformer substation.Through the loadwhich obtains had determined the host changes the capacity a
30、nd anumber，the hostchange the pattern，the winding wiring way，the accent press the way and the hostchanges the impedance。Third chapter is the transformer substation electricity hostwiring design，separately through to 10kV side electricity host wiring drawing up，chooses the stablest reliable wiring wa
31、y。Fourth chapter is the short class computation,first determined short-circuits the spot,calculates various parts reactance，then torespectively shortcircuits separately to carry on the computation,obtains respectivelyshort-circuits the shortcircuit current。Fifth chapter is the electrical equipmentch
32、oice，the electrical equipment including the generatrix,the circuit breaker,theisolator,the electric current and the voltage transformer,the fuse.Sixth chapter is thepower distribution equipment,mainly carries on the design to the transformer substationpower distribution equipment.Seventh chapter is
33、anti-radar with the earth，this chapterhas carried on the choice to the arrester,as well as has determined the earth way。Through to the 10kV transformer substation design，causes me has to the electricalengineering and its the automated specialized branch curriculum to be comprehensive,system grasping
34、,strengthened apply theory to reality the ability，raised the projectconsciousness，exercised me independently to analyze and the solution electric powerproject design question ability.key words substation,load，transmission system，distribution highvoltage network，correction equipment。4变电站的综合概述变电站的综合概述
35、随着经济的发展和现代工业建设的迅速崛起，供电系统的设计越来越全面、系统，工厂用电量迅速增长，对电能质量、技术经济状况、供电的可靠性指标也日益提高，因此对供电设计也有了更高、更完善的要求.设计是否合理,不仅直接影响基建投资、运行费用和有色金属的消耗量,也会反映在供电的可靠性和安全生产方面,它和企业的经济效益、设备人身安全密切相关。电力工业是国民经济的一项基础工业和国民经济发展的先行工业，它是一种将煤、石油、天然气、水能、核能、风能等一次能源转换成电能这个二次能源的工业，它为国民经济的其他各部门快速、稳定发展提供足够的动力，其发展水平是反映国家经济发展水平的重要标志。由于电能在工业及国民经济的重要
36、性，电能的输送和分配是电能应用于这些领域不可缺少的组成部分。所以输送和分配电能是十分重要的一环。变电所是使电厂或上级电站经过调整后的电能书送给下级负荷，是电能输送的重要部分。其功能运行情况、容量大小直接影响下级负荷的供电,进而影响工业生产及生活用电。若变电所系统中某一环节发生故障，系统保护环节将动作。可能造成停电等事故，给生产生活带来很大不利。因此，变电所在整个电力系统中对于保护供电的可靠性、灵敏性等指标十分重要。变电所是联系发电厂和用户的中间环节，起着变换和分配电能的作用。根据变电所任务的不同，可将变电所分为升压变电所和降压变电所两大类.升压变电所一般建在发电厂，降压变电所一般建立在靠近负荷
37、中心的低点。根据电压等级还可分为中压变电所（60 千伏及以下）、高压变电所（110220 千伏）、超高压变电所(330765 千伏）和 特高压变电所(1000 千伏及以上)。按其在电力系统中的地位可分为枢纽变电所、中间变电所和终端变电所。这就要求变电所的一次部分经济合理，二次部分安全可靠，只有这样变电所才能正常的运行工作，为国民经济服务。变电所有升压变电所和降压变电所两大类。升压变电所通常是发电厂升压站部分,紧靠发电厂。降压变电所通常远离发电厂而靠近负荷中心。下面的所设计得就是 10KV 降压变电所。变电所的主要设备有电力变压器，母线和开关设备等。变电所内都装设有各种保护装置，这些保护装置是根
38、据下级负荷地短路、最大负荷等情况来整定配置的，因此,在发生类似故障是可根据具体情况由系统自动做出判断应跳闸保护，并且，现在的跳闸保护整定时间已经很短,在故障解除后，系统内的自动重合闸装置会迅速和闸恢复供电。这对于保护下级各负荷是十分有利的。这样不仅保护了各负荷设备的安全利于延长是使用寿命，降低设备投资，而且提高了供电的可靠性，这对于提高工农业生产效率是十分有效的。工业产品的效率提高也就意味着产品成本的降低，市场竞争力增大，进而可以使企业效益提高，为国民经济的发展做出更大的贡献。生活用电等领域的供电可靠性,可以提高人民生活质量，改善生活条件等.5变电所是电力系统的一个重要组成部分，由电器设备及配
39、电网络按一定的接线方式所构成，他从电力系统取得电能，通过其变换、分配、输送与保护等功能，然后将电能安全、可靠、经济的输送到每一个用电设备的转设场所.作为电能传输与控制的枢纽，变电站必须改变传统的设计和控制模式,才能适应现代电力系统、现代化工业生产和社会生活的发展趋势.随着计算机技术、现代通讯和网络技术的发展，为目前变电站的监视、控制、保护和计量装置及系统分隔的状态提供了优化组合和系统集成的技术基础。该地区变电所所涉及方面多，考虑问题多,分析变电所担负的任务及用户负荷等情况,选择所址，利用用户数据进行负荷计算，确定用户无功功率补偿装置.同时进行各种变压器的选择，从而确定变电站的接线方式，再进行短
40、路电流计算,选择送配电网络及导线，进行短路电流计算。选择变电站高低压电气设备，为变电站平面及剖面图提供依据。本变电所的初步设计包括了：（1）总体方案的确定（2)负荷分析（3）短路电流的计算（4）高低压配电系统设计与系统接线方案选择(5）继电保护的选择与整定（6）防雷与接地保护等内容。随着电力技术高新化、复杂化的迅速发展,电力系统在从发电到供电的所有领域中，通过新技术的使用，都在不断的发生变化。变电所作为电力系统中一个关键的环节也同样在新技术领域得到了充分的发展。本次设计任务旨在体现对本专业各科知识的掌握程度，同时检验本专业的学习结果。首先根据任务书上所给系统与线路及所有负荷的参数,分析负荷发展
41、趋势.从负荷增长方面阐明了建站的必要性，然后通过对拟建变电站的概括以及出线方向来考虑,并通过对负荷资料的分析，安全，经济及可靠性方面考虑，确定了 10kV以及站用电的主接线，然后又通过负荷计算及供电范围确定了主变压器台数,容量及型号，同时也确定了站用变压器的容量及型号，最后，根据最大持续工作电流及短路计算的计算结果，做出线路保护,变压器保护,母线保护，防雷保护。本次毕业设计以 10kV 变电站为主要设计对象，该 10kV 变电站是地区重要变电站，是电力系统 10kV 电压等级的重要部分。该变电站设有 2 台主变压器，站内主接线分为 10kV、0.4 kV 三个电压等级。本设计的第一章为绪论，主
42、要阐述了变电站在电力系统中的地位.设计变电站的原则和目的以及变电站的基本情况。第二章是负荷计算及变压器的选择，根据已知变电站的负荷资料对变电站进行负荷计算.通过得出的负荷确定了主变的容量和台数、主变的型式及主变阻抗.。三章是变电站电气主接线的设计,分别通过对 110kV、35kV、10kV 侧电气主接线的拟定,选择出最稳定可靠的接线方式。第四章是短流计算，首先确定短路点，计算各元件的电抗,然后对各短路点分别进行计算，得出各短路点的短路电流。第五章是电气设备的选择，电气设备包括母线、断路器、隔离开关、电流和电压互感器、熔断器。第六章是配电装置，主要对变电站的配电装置进行设计。通过对 110kV变电站设计,使我对电气工程及其自动化专业的主干课程有一个较为全面，系统的6掌握，增强了理论联系实际的能力，提高了工程意识,锻炼了我独立分析和解决电力工程设计问题的能力。关键词 变电站、负荷、输电系统、配电系统、高压网络、补偿装置7