【正文】
靠性,滿足備調(diào)建設(shè)和應(yīng)急指揮需求,保障電網(wǎng)安全穩(wěn)定運(yùn)行。國調(diào)、網(wǎng)調(diào)、省調(diào)、地調(diào)及各級(jí)備調(diào)節(jié)點(diǎn)全部配置單機(jī)。計(jì)算機(jī)數(shù)據(jù)通信模擬通道傳輸速率一般為1200、2400、4800、9600bit/s;數(shù)字通道傳輸速率一般為N*64kbit/s、N*2Mbit/s、155Mbit/s等。因此,數(shù)字通道減少模擬通道多次A/D轉(zhuǎn)換及PCM轉(zhuǎn)接而引起的通道異常,電路全程數(shù)字化、時(shí)隙化,無A/D轉(zhuǎn)換過程,提供了穩(wěn)定、可靠、實(shí)時(shí)、高QOS的電信級(jí)服務(wù),克服了原有PCM專線方式的眾多問題。RTA、RTB分別通過CPOS接口接入傳輸設(shè)備SDH,速率一般為155Mbit/s,R1通過2個(gè)雙向E1接口接入傳輸設(shè)備SDH,其余網(wǎng)絡(luò)接口之間為100Mbps鏈路。模擬通道使用CDT/華東101規(guī)約,數(shù)字(透?jìng)鳎┩ǖ朗褂肐EC608705101華東2004年修訂版,數(shù)據(jù)網(wǎng)通道使用IEC608705104華東2004年修訂版。關(guān)鍵詞:模擬通道;數(shù)字(透?jìng)鳎┩ǖ?;電力調(diào)度數(shù)據(jù)網(wǎng);SGDnet2;I區(qū)業(yè)務(wù);II區(qū)業(yè)務(wù);IEC608705101;IEC608705104;二次安全防護(hù)Abstract:Communication channel system is the supporting system of SCADA,in this paper , three kinds of munication channels were introduced and pelled ,mention the access method of realtime data and the quality of three channels quality ,high speed、wide band、double equipped network is the direction of data network.Key word: analogical channel ;digital channel ;SGDnet;the second plane ; area Ⅰ data ;area Ⅱ data ;IEC608705101;