电力系统继电保护毕业论文中英文资料外文翻译文献.doc

电力系统继电保护论文中英文资料

Relay protection development present situation

[Abstract ] reviewed our country electrical power system relay protection technological devil orpiment process, has outlined the microcomputer relay protection technology achievement, pro posed the future relay protection technological development tendency will be: Computerizes, n networked, protects, the control, the survey, the data communication integration and the artificial I intellectualization.
[Key word ] relay protection present situation development, relay protections future development
1 relay protection development present situation
The electrical power system rapid development to the relay protection proposed unceasingly t he 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 velopment, therefore, the relay protection technology is advantageous, has completed the deve lopment 4 historical stage in more than 40 years time.
After the founding of the nation, our country relay protection discipline, the relay protection de sign, the relay manufacture industry and the relay protection technical team grows out of noth ing, has passed through the path in about 10 years which advanced countries half century pa sses through. The 50's, our country engineers and technicians creatively absorption, the diges tion, have grasped the overseas advanced relay protection equipment performance and the m ovement technology，completed to have the deep relay protection theory attainments and the rich movement experience relay protection technical team, and grew the instruction function t o the national relay protection technical team's establishment. The acheng relay factory introd uction has digested at that time the overseas advanced relay manufacture technology, has est ablished our country relay manufacturing industry. Thus our country has completed the relay p rotection research, the design, the manufacture, the movement and the teaching complete sys tern in the 60's. This is a time which the mechanical and electrical relay protection prospers, was our country relay protection technology development has laid the solid foundation.
From the end of the 50's, the transistor relay protection was starting to study. In the 60's to t he 80's in are the times which the transistor relay protection vigorous development and widely
uses. 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 away from th e protection, moves on the Gezhou Dam 500 kv line , finished the 500kv line protection to d epend upon completely from the overseas import time.
From the 70's, started based on the integration operational amplifier integrated circuit protectio n to study. Has formed the complete series to at the end of 80’s integrated circuit protection, substitutes for the transistor protection gradually. The development, the production, the applica tion the integrated circuit protects which to the beginning of the 90's still were in the dominan t position, this was the integrated circuit protection time. The integrated electricity road work fr equency conversion quantity direction develops which in this aspect Nanjing electric power aut omation research institute high frequency protected the vital role , the Tianjin University and t he Nanjing electric power automation plant cooperation development integrated circuit phase v oltage compensated the type direction high frequency protection also moves in multi- strip 220 kv and on the 500kv line.
Our country namely started the computer relay protection research from the end of the 70’s， the institutions of higher learning and the scientific research courtyard institute forerunners fu notion. Huazhong University of Science and Technology, southeast the university, the North C hina electric power institute, the Xian Jiaotong University, the Tianjin University, Shanghai Jiao tong University, the Chongqing University and the Nanjing electric power automation research institute one after another has all developed the different principle, the different pattern microc omputer protective device. In 1984 the original North China electric power institute developed the transmission line microcomputer protective device first through the appraisal, and in the system the find application, had opened in our country relay protection history the new page, pr otected the promotion for the microcomputer to pave the way. In the host equipment protectio n aspect, the generator which southeast the university and Huazhong University of Science a nd Technology develops loses magnetism protection, the generator protection and the generat or?Bank of transformers protection also one after another in 1989，in 1994 through appraisal, investment movement. The Nanjing electric power automation research institute develops micro computer line protective device also in 1991 through appraisal. The Tianjin University and the Nanjing electric power automation plant cooperation development microcomputer phase voltag e compensated the type direction high frequency protection, the Xian Jiaotong University and the Xu Chang relay factory cooperation development positive sequence breakdown component direction high frequency protection also one after another in 1993，in 1996 through the appra isal. Heres, the different principle, the different type microcomputer line and the host equipme nt protect unique, provided one batch of new generation of performance for the electrical po wer 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 starte d our country relay protection technology from the 90*s to enter the time which the microcom puter protected.
2 relay protections future development The relay protection technology future the tendency will be to computerizes, networked, the int ellectualization, will protect, the control, the survey and the data communication integration de velopment.
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 de velops the microcomputer line protection hardware has experienced 3 development phases: Is published from 8 lists cpu structure microcomputer protection, does not develop to 5 years ti me to the multi- cpu structure, latter developed to the main line does not leave the module t he big modular structure, the performance enhances greatly, obtained the widespread applicati on. Huazhong University of Science and Technology develops the microcomputer protection al so is from 8 cpu, develops to take the labor controlling machine core partially as the foundati on 32 microcomputers protection.
The Nanjing electric power automation research institute from the very beginning has develop ed 16 cpu is the foundation microcomputer line protection, obtained the big area promotion, a t present also is studying 32 protections hardware system. Southeast the university develops t he microcomputer host equipment protects the hardware also passed through improved and th e enhancement many times. The Tianjin University from the very beginning is the developmen t take more than 16 cpu as the foundation microcomputer line protection, in 1988 namely star ted to study take 32 digital signals processor (dsp) as the foundation protection, the control, t he survey integration microcomputer installment, at present cooperated with the Zhuhai Jin aut omatic 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 preci sion, because of the precision the a/d switch resolution limit, is surpassed time 16 all is acce pts with difficulty in the conversion rate and the cost aspect; 32 microcomputers chips have t he 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 cpu re gister, 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 protects to the microcomputer enhances uncea singly, besides protection basic function, but also should have the large capacity breakdown i nformation and the data long-term storage space, the fast data processing function, the formid able traffic capacity, with other protections, the control device and dispatches the networking b y to share the entire system data, the information and the network resources ability, the high er 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 iod, once conceived has made the relay protection installment with a minicomputer. At that ti me because the small machine volume big, the cost high, the reliability was bad, this tentativ e plan was not realistic. Now, with the microcomputer protective device size similar labor cont rolling machine function, the speed, the storage capacity greatly has surpassed the same year small machine, therefore, made the relay protection with complete set labor controlling machi ne the opportunity already to be mature, this will be one of development directions which the microcomputer protected. The Tianjin University has developed the relay protection installmen t which Cheng Vongtong microcomputer protective device structure quite same not less than one kind of labor controlling machine performs to change artificially becomes. This kind of eq uipment merit includes: has the 486pc machine complete function, can satisfy each kind of f unction request which will protect to current and the future microcomputer, size and structure and present microcomputer protective device similar, the craft excellent, quakeproof, guards a gainst has been hot, guards against electronmagetic interference ability, may move 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 wilfully regarding the different prote ction, the disposition nimble, is easy to expand.
Relay protection installment，computerizes 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 networked
The computer network has become the information age as the information and the data com munication tool the technical prop, caused the human production and the social life appearanc e has had the radical change. It profoundly is affecting each industry domain, also has provid ed the powerful means of communication for each industry domain. So far, besides the differe ntial motion protection and the vertical association protection, all relay protections installment a II only can respond the protection installment place electricity spirit. The relay protection functi on also only is restricted in the excision breakdown part, reduces the accident to affect the s cope. This mainly is because lacks the powerful data communication method. Overseas alread y had proposed the system protection concept, this in mainly referred to the safe automatic d evice at that time. Because the relay protection function 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 protectio n unit all to be able to share the entire system the movement and the breakdown information data, each protection unit and the superposition brake gear in analyze these information and in the data foundation the synchronized action, guarantees the system the security stable mo vement. Obviously, realizes this kind of system protection basic condition is joins the entire sy stem each main equipment protective device with the computer network, that is realization mic rocomputer protective device networked. This under the current engineering factor is completel y possible.
Regarding the general non- system protection, the realization protective device computer netw orking also has the very big advantage. The relay protection equipment can obtain system fail ure 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 principle research, also has yielded the certain result, but must realiz e truly protects to the system movement way and the malfunction auto-adapted, must obtain t he more systems movement and the breakdown information, only then realization protection c omputer networked, can achieve this point.
Regarding certain protective device realization computer networkings, also can enhance the pr otection the reliability. The Tianjin University in 1993 proposed in view of the future Three Go rges hydroelectric power station 500kv ultrahigh voltage multi- return routes generatrix one kin d of distributional generatrix protection principle, developed successfully this kind of equipment initially. Its principle is disperses the traditional central generatrix protection certain (with to pr otect generatrix to return way to be same) the generatrix protection unit, the dispersible attire is located in on various return routes protection screen, each protection unit joins with the c omputer network, each protection unit only inputs this return route the amperage, after transfo rms it the digital quantity, transmits through the computer network for other all return routes p rotection unit, each protection unit acts according to this return route the amperage and other all return routes amperage which obtains from the computer network, carries on the generatri x differential motion protection the computation, if the computed result proof is the generatrix i nterior breakdown then only jumps the book size return route circuit breaker, Breakdown gene ratrix isolation. When generatrix area breakdown, each protection unit all calculates for exterior breakdown does not ac