描述
Triconex 4351B
1997年7月原電力部召開了熱工自動(dòng)化領(lǐng)導(dǎo)小組第六次擴(kuò)大會(huì),對(duì)電氣設(shè)計(jì)如何與DCS配合提出了具體意見:“實(shí)現(xiàn)爐、機(jī)、電集中管理,使電廠主控室爐、機(jī)、電控制水平協(xié)調(diào)發(fā)展是必要的而且在現(xiàn)有技術(shù)和裝備條件下是可行的,可以起到省人、省主控制室面積,便于集控值班運(yùn)行的作用,而且不提高造價(jià)。領(lǐng)導(dǎo)小組要求以積極的態(tài)度加入電氣納入DCS的工程試點(diǎn)?!卑创司?,九江電廠三期2×350MW、信陽電廠一期2×300MW、益陽電廠一期2×300MW工程電氣系統(tǒng)均納入DCS監(jiān)控?,F(xiàn)依據(jù)這幾個(gè)工程中具體實(shí)施的過程和要求,就電氣系統(tǒng)納入DCS監(jiān)控的一些有關(guān)問題進(jìn)行分析和探討。電氣系統(tǒng)與熱工自動(dòng)化相比在控制要求及運(yùn)行過程中有著很多不同點(diǎn),電氣的主要特點(diǎn)表現(xiàn)為:
(1)電氣設(shè)備相對(duì)熱工設(shè)備而言控制對(duì)象少,操作頻率低,有的系統(tǒng)或設(shè)備運(yùn)行正常時(shí),時(shí)常幾個(gè)月或更長時(shí)間才操作一次。
(3)300MW及以上機(jī)組一般每2臺(tái)機(jī)組共用1臺(tái)起/備變,任一機(jī)組檢修都不能影響另1臺(tái)機(jī)組的正常運(yùn)行,因此DCS控制應(yīng)考慮其控制方式,確保只能有1臺(tái)機(jī)組的DCS實(shí)現(xiàn)對(duì)共用部分的控制,同時(shí)另一機(jī)組DCS能夠?qū)崿F(xiàn)實(shí)時(shí)監(jiān)視,并且這種操作控制權(quán)能實(shí)現(xiàn)切換。
(4)電氣設(shè)備電氣系統(tǒng)的聯(lián)鎖邏輯較簡單,但電氣設(shè)備本身操作機(jī)構(gòu)復(fù)雜。
因此,機(jī)組的電氣系統(tǒng)納入DCS控制,要求控制系統(tǒng)具有很高的可靠性。除了能實(shí)現(xiàn)正常起停和運(yùn)行操作外,尤其要求能夠?qū)崿F(xiàn)實(shí)時(shí)顯示異常運(yùn)行和事故狀態(tài)下的各種數(shù)據(jù)和狀態(tài),并提供相應(yīng)的操作指導(dǎo)和應(yīng)急處理措施,保證電氣系統(tǒng)自動(dòng)控制在最安全合理的工況下工作。
產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢價(jià)格,大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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