25 6 1997 11 33 (461000), (IPC) (LAN ),,,,,,,, (PC),, PC,,,,,,,,,,,, 1 111, (LAN )(W AN ),,,,,,,,,,, 112,,,,, : 1997 06 25
34 113,,,,,,, 30, 10 5 114,,,, 70% 115,,,, GLQ 2,, 35,, 35 116,,,,, 117,,, 18,, 118,,,,,,,, 119,,,, 2 211,,,,, ( IPC) PC,,,, - 40 + 80,, (M TBF) 90, 000 230, 000 ;, PC
25 6 1997 11 35,,,,, PC, ;, PC,,,,, PC 1 2 1, FA X, FA X, 2,, 1, 1 (1), 386 486,, (CR T ) (2) (3) FA X, (4) 212,,,,,, 3 2 3,,
36 3 (1) (2) (3) (4) (5) (SO E) (6) (GPS), 011m s (7),,, (8),,,,, (9),, 3,,, PSHA,,,,,,, ;, (10) PC,,,,, 4 5 4, ; 5 (LAN ),
25 6 1997 11 37, (11), 4, a1,, ; b1 ; c1,,,, 5 d1 (GPS) 011m s e1 (SO E) ; f1 ; g1,, h1 ; i1,,, j1, 4 5 5,,,, 6,,,,, 8,,,,, 20 30,
38,,,,,,,, 6 PC,,, PC,, g, (LAN ),,,, 1. 1, 199312 21 220 500kV 1, 31 1, 41 220 500kV 5 1 GPS 1, 199513 61 1, 1993 71 1 1, 1993 11995 11995 ( 29 ) 3,,, 11 1 2 1 1, 199313 3 P refo rm ance and testing of telep ro tection Equipm ent of pow er System IEC834-1. 1988 4 SSB System ESB 500 fo r pow er line Carrier Comm uniction 5 SW T 500F6 System W ith F6M odulation fo r T ransm ission of p ro tection Singnals fo r D irect o r indirect Ro2 mo te T ripp ing. Simm ens A G Docum entation F ile
YT F (S) - 500 remo te trip signal transm ission device is a new generation of remo te tripp ing device w h ich is developed basing on the advanced techno logy of SW T - 500F6 telep ro tection signal audio tran sm ission device and ESB 500 pow er line carrier of Siem ens company. D iffering w ith o ther remo te tripp ing signal transm ission devices in Ch ina, the device can sim ultaneously transm it the remo te tripp ing signals of tw o independent sys2 tem ṡ It has h igher safety and reliability than that of o ther devices, because it adop ts the patent techniques of Siem ens company, the keyed frequence- sh ift F6 modulation technique and the pulse no ise restraint tech2 nique. Keywords: R emo te trip Safety R eliability Keyed frequence- sh ift D evelopm en t of IC- Based Com plete Protection Suitable for Small or M iddle Scale Hydro (Thermal) Power Station s Zhang Dawe i et al(30) A n IC- based p ro tective device w h ich is suitable fo r the sm all o r m iddle scale hydro (therm al)pow er stations w ith the single generato r capacity no t mo re than 50MW and the outgo ing vo ltage no t h igher than 35kV is in2 troduced. T he device uses digital dial setting and its m ain p ro tective unit is equipped w ith elem ent failure lock2 ing circuiṫ So it has h igher reliability and flexibility. Keywords: P ro tection digital setting IC- based Sm all and m iddle- scale hydro (therm al)p row er stations G ENERAL D ESCR IPTION Curren t State of fault Recorder and D iscussion on New Schem Su Hongxun et al(33) T he m ain functions and impo rtant features of the new generation of com bined fault reco rder and monito r de2 vice w h ich is set up on IPC technique, LAN technique and comm unication technique are described in view of the sho rtcom ings of fault reco rder in Ch ina. Keywords: Fault reco rder H armonic analysis O n- line data analysis IPC LAN D iscussion on the M aloperation Cause of HF Block ing Type Protection Zhang Keyuan et al(39) T he influence of 150H z line- frequence component w h ich com es into the transceiver of H F p ro tection via H F channel is analyzed. Com bined w ith the analysis on the interrup ted w aves of receiver s H F signal reco rded at tw o faults, the judgem ent is given that the m aloperation results from the 50H z line- frequence component w h ich com es into the H F output circuit of the transceiver w hen the H F channel is no t grounded w ell. T h is pa2 per p resents a m ethod of restricting the line- frequency component and suggests to verify the co rrectness of the analysis by farther sim ulation com bined w ith site experience. Keywords: R eceiving interrup t H F channel H F transfo rm er saturation L in - frequency component Ground po tential rise EXPER IENC E EXCHANG E THR D istance Protection Appl ied in Dayawan Nuclear Power Sta tion Zhang Huagui(45) Fo r the connections of 500kV one- and- a- half CB s, line p ro tection is equipped acco rding to line layout and operates to tw o CB ṡ T he available distance p ro tections can be selected from dom estic CKJ - 1, L Z96 and RA ZFE of ABB company, 7SL 32 of Siem ens company, TL S of GE company, and THR of R eyro lle company, etc. T he THR distance p ro tection used on the D ayaw an nuclear pow er station to Zengcheng 500kV line is in2 troduced. Keywords: Static type D istance p ro tection Sw ing block ing Analysis and Coun term easure of Anomaly in Con trol C ircuit Y u Junfeng et al(49) T he anom aly of contro l circuit is carefully analyzed in th ree aspects and the detailed so lution is p resented bas2 ing on som e typ ical examp leṡ Keywords: Contro l circuit CB T ripp roof relay System reliability REL IAB IL ITY RES EARCH Study on the Testing and A ssessm en tm ethod of M easurem en t Relay s Reliability Han Tianx ing et al(52) Because the failure of relay and p ro tective device can lead great lo ss to pow er system and o ther industries, to rise the relialility of equipm ent used in the pow er system is very necessary. M easurem ent relay is a basic unit of relay p ro tection fo r pow er system, so to study the reliability of m easurem ent relay becom es mo re impo r2 tanṫ T he reliability data system is set up basing on the operation feature of the relay. M any impo rtant ques2 tions, such as how to perfo rm the verification, assessm ent and statistic of the reliability are discussed and the testing p rocedure is described. Basing on the above test theo ry of reliability, the reliability tester of m easure2 m ent relay is studied. Key words:m easurem ent relay R eliability data system R eliability test The design ing of Resisting D isturbance of the Subrack Han Zaol in, X iao Juan (56) A long w ith the developm ent of modern scientific technique,mo re and mo re equipm ent in pow er, electronic and apparatus industries use subrack structure to lay electronic elem entṡ To decrease the influence of electrom ag2 netic w ave and static electricity p roduced from the equipm ent and environm ent on the function of the equip2 m en t, how to im p rove the function and reliab ility of resisting distu rbance in aspects of m aterial selection, earth ing design, card screening,mounting location and ventage design are discussed. Key words: Subrack A nti- interference design Screening