DCS一體化實(shí)現(xiàn)多種功能，有許多好處，例如，維護(hù)方便，備品備件減少，RAC3.5-100-460-A00-W1-220信息共享快速、可靠，人機(jī)界面統(tǒng)一等等，DCS功能最早包括DAS、MCS、SCS和FSSS，發(fā)展到今天，DCS一體化范圍可以進(jìn)一步擴(kuò)大。
1) DEH采用DCS系統(tǒng)實(shí)現(xiàn)問題，規(guī)程中提出二個(gè)前提，一是由汽輪機(jī)廠負(fù)總責(zé)，即提
RAC3.5-100-460-A00-W1-220出和審定功能框圖和性能要求，并落實(shí)與汽機(jī)的接口，二是DCS公司有成功應(yīng)用DCS實(shí)現(xiàn)DEH的經(jīng)驗(yàn)。目前大部分DCS公司已經(jīng)能滿足上述要求了，當(dāng)然我們?nèi)匀徊慌懦馄啓C(jī)廠或DEH專業(yè)廠供應(yīng)專門DEH系統(tǒng)的方案，一般說來，他們經(jīng)驗(yàn)更豐富一些，當(dāng)前已經(jīng)可以方便的解決DCS與DEH間雙向冗余通訊，實(shí)現(xiàn)用DCS操作員站作為單一人機(jī)界面(個(gè)別情況下，對(duì)于控制信號(hào)可以采用硬接線實(shí)現(xiàn))。
2) ETS納入DCS問題。經(jīng)歷這一段實(shí)踐DCS可信度大大提高，已有一些工程成功的
RAC3.5-100-460-A00-W1-220將ETS納入DCS，但必須注意ETS的控制器處理周期不應(yīng)大于50ms，最好在20-30ms間。另外應(yīng)采用獨(dú)立的冗余控制器，以盡可能提高可靠性。最近國家電力公司組織審查《老廠自動(dòng)化技術(shù)改造導(dǎo)則》時(shí)，決定宜采用獨(dú)立控制器改為應(yīng)采用獨(dú)立控制器。
3) 自動(dòng)同期裝置(ASS)納入DCS問題。早期電氣控制納入DCS時(shí)，由于缺乏經(jīng)驗(yàn)，
RAC3.5-100-460-A00-W1-220僅把發(fā)變組和廠用電的順控系統(tǒng)(SCS G/A)納入DCS，規(guī)定自動(dòng)同期裝置(ASS)、自動(dòng)勵(lì)磁調(diào)節(jié)裝置(AVR)和發(fā)電機(jī)保護(hù)系統(tǒng)不納入DCS，經(jīng)過四、五年實(shí)踐SCS G/A 納入DCS無論從管理上和技術(shù)上均已成熟，取得成功應(yīng)用經(jīng)驗(yàn)。關(guān)于ASS裝置，目前已有DCS公司有將其納入DCS的技術(shù)，因此，在審查老廠技改導(dǎo)則時(shí)，將相關(guān)條文改為，當(dāng)DCS的公司有將其納入DCS的成功應(yīng)用經(jīng)驗(yàn)時(shí)，也可將ASS納入DCS，這充分體現(xiàn)了技術(shù)發(fā)展時(shí)規(guī)程也要跟著變化的思想，防止規(guī)程成了束縛技術(shù)發(fā)展的框框。
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RAC3.5-100-460-A00-W1-220
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RAC3.5-150-460-L00-W1-220
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