继电保护发展现状 电气工程及自动化专业毕业设计外文翻译中英文对照

1、外文翻译（原文）山东理工大学毕业设计（外文翻译材料）学 院：专 业：学生姓名：指导教师：电气与电子工程学院电气工程及其自动化relay protection development present situationabstract: reviewed our country electrical power system relay protection technological development process, has outlined the microcomputer relay protection technology achievement, propose the f

2、uture relay protection technological development tendency will be: computerizes, networked, protects, the control, the survey, the data communication integration and the artificial intellectualization.key word: relay protection, present situation development, future development1 relay protection dev

3、elopment present situationthe electrical power system rapid development to the relay protection propose unceasingly the new request, the electronic technology, computer technology and the communication rapid development unceasingly has poured into the new vigor for the relay protection technology de

4、velopment, therefore, the relay protection technology is advantageous, has completed the development 4 historical stage in more than 40 years time.after the founding of the nation, our country relay protection discipline, the relay protection design, the relay manufacture industry and the relay prot

5、ection technical team grows out of nothing, has passed through the path in about 10 years which advanced countries half century passes through. the 50s, our country engineers and technicians creatively absorption, the digestion, have grasped the overseas advanced relay protection equipment performan

6、ce and the movement technology , completed to have the deep relay protection theory attainments and the rich movement experience relay protection technical team, and grew the instruction function to the national relay protection technical teams establishment. the relay factory introduction has diges

7、ted at that time the overseas advanced relay manufacture technology, has established our country relay manufacturing industry. thus our country has completed the relay protection research, the design, the manufacture, the movement and the teaching complete system in the 60s. this is a time which the

8、 mechanical and electrical relay protection prospers, was our countries relay protection technology development has laid the solid foundation.from the end of the 50s, the transistor relay protection was starting to study. in the 60s to the 80s， it is the times which the transistor relay protection v

9、igorous development and widely used. tianjin university and the nanjing electric power automation plant cooperation research 500kv transistor direction high frequency protection the transistor high frequency block system which develops with the nanjing electric power automation research institute is

10、 away from the protection, moves on the gezhou dam 500kv line , finished the 500kv line protection to depend upon completely from the overseas import time.from the 70s, start based on the integration operational amplifier integrated circuit protection to study. has formed the completely series to at

11、 the end of 80s integrated circuit protection, substitutes for the transistor protection gradually. the development, the production, the application the integrated circuit protects which to the beginning of the 90s still were in the dominant position, this was the integrated circuit protection time.

12、 the integrated electricity road work frequency conversion quantity direction develops which in this aspect nanjing electric power automation research institute high frequency protected the vital role, the tianjin university and the nanjing electric power automation plant cooperation development int

13、egrated circuit phase voltage compensated the type direction high frequency protection also moves in multi- strip 220kv and on the 500kv line.our country namely started the computer relay protection research from the end of the 70s, the institutions of higher learning and the scientific research cou

14、rtyard institute forerunners function. huazhong university of science and technology, southeast the university, the north china electric power institute, the xian jiao tong university, the tianjin university, shanghai jiao tong university, the chongqing university and the nanjing electric power auto

15、mation research institute one after another has all developed the different principle, the different pattern microcomputer protective device. in 1984 the original north china electric power institute developed the transmission line microcomputer protective device first through the evaluation and in

16、the system the find application, had opened in our country relay protection history the new page, protect the promotion for the microcomputer to pave the way. in the host equipment protection aspect, the generator which southeast the university and huazhong university of science and technology devel

17、op loses magnetism protection, the generator protection and the generator? bank of transformers protection also one after another in 1989、1994 through appraisal and investment movement. the nanjing electric power automation research institute develops microcomputer line protective device also in 199

18、1 through appraisal. the tianjin university and the nanjing electric power automation plant cooperation development microcomputer phase voltage compensated the type direction high frequency protection, the xian jiao tong university and the xuchang relay factory cooperation development positive seque

19、nce breakdown component direction high frequency protection also one after another in 1993, in 1996 through the appraisal. here, the different principle, the different type microcomputer line and the host equipment protect unique, provided one batch of new generation of performance for the electrica

20、l power system fine, the function has been complete, the work reliable relay protection installment. along with the microcomputer protective device research, in microcomputer aspect and so on protection software, algorithm has also yielded the very many theories result. may say started our country r

21、elay protection technology from the 90s to enter the time which the microcomputer protected.2 relay protections future developmentthe relay protection technology future the tendency will be to computerizes, networked, the intellectualization, will protect, the control, the survey and the data commun

22、ication integration development.2.1 computerizes along with the computer hardware swift and violent development, the microcomputer protection hardware also unceasingly is developing. the original north china electric power institute develops the microcomputer line protection hardware has experienced

23、 3 development phases: is published from 8 lists cpu structure microcomputer protection, does not develop to 5 years time to the multi- cpu structure, latter developed to the main line does not leave the module the big modular structure, the performance enhances greatly, obtained the widespread appl

24、ication. huazhong university of science and technology develops the microcomputer protection also is from 8 cpu, develops to take the labor controlling machine core partially as the foundation 32 microcomputers protection.the nanjing electric power automation research institute from the very beginni

25、ng has developed 16 cpu is the foundation microcomputer line protection, obtained the big area promotion, at present also is studying 32 protections hardware system. southeast the university develops the microcomputer host equipment protects the hardware also passed through improved and the enhancem

26、ent many times. the tianjin university from the very beginning is the development take more than 16 cpu as the foundation microcomputer line protection, in 1988 namely started to study take 32 digital signals processor (dsp) as the foundation protection, the control, the survey integration microcomp

27、uter installment, at present cooperated with the zhuhai automatic equipment company develops one kind of function complete 32 big modules, a module was a minicomputer. uses 32 microcomputers chips only to focus by no means on the precision, because of the precision the a/d switch resolution limit, i

28、s surpassed time 16 all is accepts with difficulty in the conversion rate and the cost aspect; 32 microcomputers chips have the very high integration rate more importantly, very high operating frequency and computation speed, very big addressing space, rich command system and many inputs outlet. the

29、 cpu register, the data bus, the address bus all are 32, has the memory management function, the memory protection function and the duty transformation function, and (cache) and the floating number part all integrates the high speed buffer in cpu.the electrical power system the request which protect

30、s to the microcomputer enhances unceasingly, besides protection basic function, but also should have the large capacity breakdown information and the data long-term storage space, the fast data processing function, the formidable traffic capacity, with other protections, the control device and dispa

31、tches the networking by to share the entire system data, the information and the network resources ability, the higher order language programming and so on. this requests the microcomputer protective device to have is equal to a pc machine function. in the computer protection development initial per

32、iod, once conceived has made the relay protection installment with a minicomputer. at that time because the small machine volume big, the cost high, the reliability was bad, this tentative plan was not realistic. now, with the microcomputer protective device size similar labor controlling machine fu

33、nction, the speed, the storage capacity greatly has surpassed the same year small machine, therefore, made the relay protection with complete set labor controlling machine the opportunity already to be mature, this will be one of development directions which the microcomputer protected. the tianjin

34、university has developed the relay protection installment which cheng yong tong microcomputer protective device structure quite same not less than one kind of labor controlling machine performs to change artificially becomes. this kind of equipment merit includes: has the 486pc machine complete func

35、tion, can satisfy each kind of function request which will protect to current and the future microcomputer. size and structure and present microcomputer protective device similar, the craft excellent, quakeproof, guards against has been hot, guards against electromagnetic interference ability, may m

36、ove in the very severe working conditions, the cost may accept. uses the std main line or the pc main line, the hardware modulation, may select the different module willfully regarding the different protection, the disposition nimble, and is easy to expand.relay protection installment, computerizes

37、is the irreversible development tendency. how but to satisfies the electrical power system request well, how further enhances the relay protection the reliability, how obtains the bigger economic efficiency and the social efficiency, still must conduct specifically the thorough research. 2.2 network

38、edthe computer network has become the information age as the information and the data communication tool the technical prop, caused the human production and the social life appearance has had the radical change. it profoundly is affecting each industry domain, also has provided the powerful means of

39、 communication for each industry domain. so far, besides the differential motion protection and the vertical association protection, all relay protections installment all only can respond the protection installment place electricity spirit. the relay protection function also only is restricted in th

40、e excision breakdown part, reduces the accident to affect the scope. this mainly is because lacks the powerful data communication method. overseas already had proposed the system protection concept, this in mainly referred to the safe automatic device at that time. because the relay protection funct

41、ion not only is restricted in the excision breakdown part and the limit accident affects the scope (this is most important task), but also must guarantee the entire system the security stable movement. this requests each protection unit all to be able to share the entire system the movement and the

42、breakdown information data, each protection unit and the superposition brake gear in analyze this information and in the data foundation the synchronized action, guarantees the system the security stable movement. obviously, realizes this kind of system protection basic condition is joins the entire

43、 system each main equipment protective device with the computer network, that is realization microcomputer protective device networked. this under the current engineering factor is completely possible.regarding the general non- system protection, the realization protective device computer networking

44、 also has the very big advantage. the relay protection equipment can obtain system failure information more, then to the breakdown nature, the breakdown position judgment and the breakdown distance examination is more accurate. passed through the very long time to the auto-adapted protection princip

45、le research, also has yielded the certain result, but must realize truly protects to the system movement way and the malfunction auto-adapted, must obtain the more systems movement and the breakdown information, only then realization protection computer networked, can achieve this point.regarding ce

46、rtain protective device realization computer networking also can enhance the protection the reliability. the tianjin university in 1993 proposed in view of the future three gorges hydroelectric power station 500kv ultrahigh voltage multi-return routes generatrix one kind of distributional generatrix

47、 protection principle, developed successfully this kind of equipment initially. its principle is disperses the traditional central generatrix protection certain (with to protect generatrix to return way to be same) the generatrix protection unit, the dispersible attire is located in on various retur

48、n routes protection screen, each protection unit joins with the computer network, each protection unit only inputs this return route the amperage, after transforms it the digital quantity, transmits through the computer network for other all return routes protection unit, each protection unit acts a

49、ccording to this return route the amperage and other all return routes amperage which obtains from the computer network, carries on the generatrix differential motion protection the computation, if the computed result proof is the generatrix interior breakdown then only jumps the book size return ro

50、ute circuit breaker, breakdown generatrix isolation. when generatrix area breakdown, each protection unit all calculates for exterior breakdown does not act. this kind the distributional generatrix protection principle which realizes with the computer network has the high reliability compared to the

51、 traditional central generatrix protection principle. because if a protection unit receives the disturbance or the miscalculation when moves by mistake, only can wrongly jump the book size return route, cannot create causes the generatrix entire the malignant accident which excises, this regarding l

52、ooks like the three gorges power plant to have the ultrahigh voltage generatrix the system key position to be extremely important.by above may know, microcomputer protective device may enhance the protection performance and the reliability greatly, this is the microcomputer protection development in

53、evitable trend.2.3 protections, control, survey, data communication integrations in realization relay protection computerizing with under the condition, the protective device is in fact a high performance, the multi-purpose computer, is in an entire electrical power system computer network intellige

54、nt terminal. it may gain the electrical power system movement and breakdown any information and the data from the net, also may protect the part which obtains it any information and the data transfer for the network control center or no matter what a terminal. therefore, each microcomputer protectiv

55、e device not only may complete the relay protection function, moreover in does not have in the breakdown normal operation situation also to be possible to complete the survey, the control, the data communication function that is realization protection, control, survey, data communication integration

56、.at present, in order to survey, the protection and the control need, outdoor transformer substation all equipment, like the transformer, the line and so on the secondary voltage, the electric current all must use the control cable to direct to . lays the massive control cable not only must massivel

57、y invest, moreover makes the secondary circuit to be extremely complex. but if the above protection, the control, the survey, the data communication integration computer installation, will install in outdoor transformer substation by the protection device nearby, by the protection device voltage, th

58、e amperage is changed into after this installment internal circulation the digital quantity, will deliver through the computer network, then might avoid the massive control cable. if takes the network with the optical fiber the transmission medium, but also may avoid the electromagnetic interference

59、. now the optical current transformer (ota) and the optical voltage transformer (otv) in the research trial stage, future inevitably obtained the application in the electrical power system. in uses ota and in the otv situation, the protective device should place is apart from ota and the otv recent place, that is should place by the protection device nearby. ota and the otv light signal inputs after this integration installment in and transforms the electrical