cng ty in lc 3

Gii php kt ni Recloser vi h thng miniSCADA qua giao thc IEC 60870-5-104 bng ng truyn Internet 3G/GPRS

1/ Ni dung gii php

1.1/ Khi qut giao thc IEC104

Giao thc IEC 60870-5-104 (IEC104) l phn m rng ca giao thc IEC 101 vi mt s thay i trong cc dch v truyn thng (lp vt l - physical layer v lp lin kt - link layer). IEC104 chy trn nn tng giao thc TCP/IP kt ni vo mng LAN (Local Area Network) vi b nh tuyn (Router) v cc thit b mng khc nhau (ISDN, X.25, Frame Relay..), ng thi c th c s dng kt ni vi mng WAN (Wide Area mng). Lp ng dng (application layer) ca giao thc IEC104 c nh ngha ging IEC 101 vi cc ng dng ln hn do bng thng truyn dn c m bo. Phng thc truyn d liu qua mng Ethernet c th s dng theo hnh thc (Point-to-Point) hoc (Point to MultiPoint), a ch cc i tng c xc nh theo a ch mng (Ip) ca cc thit b u cui.Vi cc c im trn, giao thc IEC104 d dng c trin khai cho cc gii php truyn thng SCADA ca li in phn phi, trn c s h tng Internet cng cng vi c ch bo mt hiu qu.1.2/ M t gii php

Ti cc Recloser: Cu hnh giao thc IEC104 cho cc Recloser vi a ch Ip cng lp mng, tng ng vi cc a ch Station (Unit number) theo lp lin kt (link layer). Kt ni cng 10/100 BaseT ca Recloser vi thit b modem 3G/GPRS Router qua giao thc mng TCP/UDP tc 10/100Mb/s. Modem s dng SIM 3G ca cc nh cung cp dch v hin c (Vina, Mobile, Viettel), modem c cp ngun 12VDC t b iu khin Recloser.

Ti DCC: lp t thit b Load Balancing VPN Router h tr kt ni a im VPN, kt ni vi Internet bng thng rng (FTTH) vi a ch Ip tnh. Thit lp mng ring o (VPN) theo c ch SSH hoc IPsec t cc modem 3G router ti Recloser vi thit b Load Balancing VPN Router ti DCC. T thit b Load Balancing VPN Router nh tuyn a ch Ip c cp pht qua VPN kt ni vi mng LAN SCADA; thit lp c ch Firewall ti Router theo a ch Ip cp pht hoc a ch MAC ca thit b.

B sung license IEC104 ti 2 my tnh FrontEnd, cu hnh line IEC104 vi cc station tng ng a ch Ip c cp pht qua Router n cc Recloser. Xy dng i tng qu trnh (Proccess Object) cho cc Recloser trn SCADA tng ng vi cc a ch theo danh sch tn hiu ti Recloser.2/ Yu cu k thut thit b:

m bo kt ni Recloser vi SCADA bng modem 3G vi giao thc IEC104, cc thit b phi p ng mt s yu cu k thut sau:

2.1/ RecloserChc nng truyn thng ca cc Recloser phi m bo cc yu cu c th sau: C kh nng kt ni vi h thng SCADA/DMS qua cc phng thc truyn thng ph bin: modem PSTN, radio UHF, 3G/GPRS

H tr giao thc IEC 60870-5-104 slave, c bng Interoperability v giao thc phi p ng km theo. H tr cc giao din kt ni: 10/100 BaseT; RS232 H tr cp ngun ngoi t 5 12VDC (1000 mA)

2.2/ Modem 3G Router

Modem 3G Router l mt b nh tuyn kt ni Internet qua mi trng GPRS/ EDGE/UMTS/HSPA+ cho php kt ni n cc thit b u cui qua cc giao thc mng TCP/UDP. Modem thit lp ng truyn VPN vi Router ti trung tm theo c ch ng hm Ip (Ip-Ip tunneling), ng thi thc hin chc nng bc tng la (firewall) cho php x l thng tin hai chiu trn tro cn NAT (Network Address Translation). Modem phi c ch to theo tiu chun cng nghip m bo yu cu lp t ti cc Recloser trong mi trng nhit v m cao. Modem phi tho mn cc yu cu k thut c th sau:Giao tip mng di ng- Dual SIM: Standard 3V/1.8V (15KV ESD protection)- Auto 3G/GPRS connect/reconnect; automatic network

failover- GSM 850/900/1800/1900 MHz

- W-CDMA 850/900/1900/2100 MHz

- GPRS class 12 / EDGE class 10

- 3G UMTS: Up to 384 Kbits/sec

- HSPA+ mode: download to 7.2 Mbps; upload to 5.76 Mbps

- Tx Power: