3RK1902-0AB00
3RK1902-0AJ00
3RK1902-0AP00
3RK1902-0AR00
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3RK1902-4BA00-5AA0
3RK1902-4CA00-4AA0
3RK1902-4DA00-5AA0
3RK1902-4GB50-4AA0
3RK1902-4HB15-5AA0
3RK1902-4HB50-5AA0
3RK1902-4HC01-5AA0
3RK1902-4PB15-3AA0
3RK1903-0AA00
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3RK1903-0AC10
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3RK1911-0BG30
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3RK1911-5BA50

對(duì)于設(shè)計(jì)人員缺乏創(chuàng)新的機(jī)制和動(dòng)力。在工程中應(yīng)用新技術(shù)總會(huì)有一定的風(fēng)險(xiǎn)，這
需要設(shè)計(jì)人員投入大量的精力進(jìn)行調(diào)研和方案論證，但現(xiàn)實(shí)往往是對(duì)應(yīng)用新技術(shù)的
研究沒有額外的投入，尤其對(duì)新技術(shù)的成功應(yīng)用也并無特別的獎(jiǎng)勵(lì)機(jī)制。
 
另外，還應(yīng)考慮到現(xiàn)場(chǎng)總線的可靠性和可用性。
 
因?yàn)殡姀S發(fā)電機(jī)組連續(xù)安全穩(wěn)定運(yùn)行是至關(guān)重要的。
控制系統(tǒng)的可靠性是保證機(jī)組可用
率的重要因素。為了提高系統(tǒng)的可靠性，現(xiàn)場(chǎng)總線技術(shù)
(FF
和
Profibus)
已經(jīng)采用了多項(xiàng)措
施，常用的有分散和冗余二項(xiàng)。
  
   
①
 
分散方面。對(duì)
FCS
系統(tǒng)而言，主要通過網(wǎng)絡(luò)分散和控制分散來提高可用性。除去將
一般控制功能下放到現(xiàn)場(chǎng)，
設(shè)計(jì)中通過上層網(wǎng)絡(luò)的區(qū)域劃分和下層網(wǎng)絡(luò)的風(fēng)險(xiǎn)管理等，
做到
一個(gè)回路的故障不影響到另一個(gè)回路。在工程設(shè)計(jì)中，建議主要控制策略還是采用常規(guī)
DCS
應(yīng)用方式，
按工藝系統(tǒng)分散在不同的控制器內(nèi)實(shí)現(xiàn)，
功能分散能夠滿足要求。
火電廠機(jī)組控
制中存在大量控制回路之間的相互聯(lián)鎖、
信號(hào)交換，
當(dāng)不同檢測(cè)控制設(shè)備處在不同網(wǎng)絡(luò)分段
時(shí)，如何確保它們之間聯(lián)鎖、交換信號(hào)的實(shí)時(shí)可靠性將是一個(gè)需要關(guān)注的問題。
 
②
3RK1922-2BA00
3RK1922-2BA01
3RK1922-2BP00
3RK1922-2BQ00
3RK1922-3BA00