1774-P1 1774-P1
1774-P1
系統(tǒng)組成
高壓采用微機保護，低壓采用監(jiān)控單元，再用通信電纜將其與計算機聯(lián)網(wǎng)之后就可以組成一個現(xiàn)代化變配電站管理系統(tǒng)——變配電站綜合自動化系統(tǒng)。
2)變配電站綜合自動化系統(tǒng)設計內(nèi)容
a高壓微機保護單元(組屏或安裝在開關柜上)選型及二次圖設計。
b低壓微機監(jiān)控單元(安裝在開關柜上)選型及二次圖設計。
c管理計算機(放在值班室，無人值班時可放在動力調(diào)度室)選型。
d模擬盤(放在值班室或調(diào)度室)設計。
e上位機(與工廠計算機或電力部門調(diào)度聯(lián)網(wǎng))聯(lián)網(wǎng)方案設計。
f通信電纜設計(包括管理計算機與上位機)。
3)管理計算機
管理計算機可根據(jù)系統(tǒng)要求進行配置。
4)模擬盤
用戶要求有模擬盤時，可以設計模擬盤，小系統(tǒng)可以用掛墻式，大系統(tǒng)用落地式，模擬盤尺寸根據(jù)供電系統(tǒng)一次圖及值班室面積來決定。模擬盤采用專用控制單元，將其通信電纜引到管理計算機處。模擬盤還需要一路交流220v電源，容量只有幾十瓦，設計時應與管理計算機電源一起考慮。
5)變配電站綜合自動化系統(tǒng)主要功能
變配電站綜合自動化系統(tǒng)的管理計算機通過通信電纜與安裝在現(xiàn)場的所有微機保護與監(jiān)控單元進行信息交換。管理計算機可以向下發(fā)送遙控操作命令與有關參數(shù)修改，隨時接受微機保護與監(jiān)控單元傳上來的遙測、遙信與事故信息。管理計算機就可通過對信息的處理，進行存盤保存，通過記錄打印與畫面顯示，還可以對系統(tǒng)的運行情況進行分析，通過遙信可以隨時發(fā)現(xiàn)與處理事故，減少事故停電時間，通過遙控可以合理調(diào)配負荷，實現(xiàn)優(yōu)化運行，從而為實現(xiàn)現(xiàn)代化管理提供了必須的條件。110kV及以上電壓等級的變電站是否能夠安全可靠運行直接影響整個電力系統(tǒng)穩(wěn)定和經(jīng)濟運行。變電站綜合自動化技術是計算機技術、通信技術和控制技術相互交融的綜合技術產(chǎn)物，為變電站的保護和控制提供了一種新的技術支持，解決傳統(tǒng)變電進行監(jiān)視和控制復雜、誤動率高等問題;提高了變電站綜合自動化水平，減少了設備檢修維護工作量，增加了變電站供電的可靠性。
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