OVATION系統(tǒng)DCS卡件 Westinghouse 1C31194G03 Ovation Control Module
OVATION系統(tǒng)DCS卡件 Westinghouse 1C31194G03 Ovation Control Module
OVATION系統(tǒng)DCS卡件 Westinghouse 1C31194G03 Ovation Control Module
以往的繼電器連鎖方式無(wú)法提供形象的信息給操作人員,只能在出現(xiàn)故障后把相關(guān)的連鎖點(diǎn)都檢查一遍,處理時(shí)間長(zhǎng),影響生產(chǎn)進(jìn)程,對(duì)隱含故障點(diǎn)無(wú)法判斷?,F(xiàn)采用PLC控制則避免了上述問(wèn)題,還可同時(shí)增加打印功能,完善系統(tǒng),為經(jīng)后的系統(tǒng)擴(kuò)展做好充分的準(zhǔn)備。具體功能如下所述:
(1) 控制保護(hù)功能
a. 當(dāng)汽輪機(jī)轉(zhuǎn)速超過(guò)10%時(shí),同時(shí)操作面板提示汽機(jī)超速,并提醒操作人員進(jìn)行檢查超速原因;當(dāng)汽輪機(jī)轉(zhuǎn)速超過(guò)12%時(shí),操作面板再次提示汽機(jī)超速,并提示操作人員通知技術(shù)人員進(jìn)行檢修維護(hù),技術(shù)人員可根據(jù)實(shí)際情況確定是否停機(jī)或超速運(yùn)行;當(dāng)轉(zhuǎn)速超過(guò)15%時(shí),汽輪機(jī)自行逐步減速,同時(shí)提示減速原因,1小時(shí)后汽輪機(jī)停機(jī),同時(shí)操作面板上顯示汽機(jī)超速停機(jī),打印機(jī)打印出停機(jī)原因:汽機(jī)超速停機(jī)。
b. 當(dāng)汽輪機(jī)軸向位移大于Ⅰ值(安全臨界值)時(shí),報(bào)警并提醒操作人員與同技術(shù)人員進(jìn)行檢查超速原因;當(dāng)汽輪機(jī)軸向位移大于Ⅱ值(安全隱患發(fā)生臨界值)時(shí),1小時(shí)后停機(jī)。同時(shí)操作面板上顯示原因,打印機(jī)打出停機(jī)原因:軸向位移大停機(jī)。
c. 當(dāng)潤(rùn)滑油壓低于Ⅰ值時(shí),報(bào)警并提醒操作人員與同技術(shù)人員進(jìn)行檢查超速原因;當(dāng)潤(rùn)滑油壓低于Ⅱ值時(shí),啟動(dòng)交流油泵;當(dāng)潤(rùn)滑油壓低于Ⅲ值(危險(xiǎn)臨界值)時(shí),停機(jī)。同時(shí)操作面板顯示停機(jī)原因,打印機(jī)打印停機(jī)原因:潤(rùn)滑油壓低停機(jī)。當(dāng)潤(rùn)滑油壓低于Ⅵ值(設(shè)備損壞臨界值)時(shí),停盤(pán)車(chē)。
d. 當(dāng)軸承油溫高于Ⅰ值時(shí),報(bào)警并啟動(dòng)油溫冷卻系統(tǒng);當(dāng)軸承油溫高于Ⅱ值時(shí),1小時(shí)后停機(jī);同時(shí)操作面板顯示停機(jī)原因,打印機(jī)打印停機(jī)原因:軸承回油溫度高停機(jī)。
e. 當(dāng)軸承軸瓦溫度高于Ⅰ值時(shí),報(bào)警并啟動(dòng)油溫冷卻系統(tǒng);當(dāng)軸承軸瓦溫度高于Ⅱ值時(shí)警報(bào)連續(xù)提示,停機(jī);同時(shí)操作面板顯示停機(jī)原因,打印機(jī)打印停機(jī)原因:軸承軸瓦溫度高停機(jī)。
f. 當(dāng)電氣送來(lái)發(fā)電機(jī)故障信號(hào)時(shí),停機(jī);同時(shí)操作面板顯示停機(jī)原因,打印機(jī)打印停機(jī)原因:發(fā)電機(jī)故障停機(jī)。
g. 當(dāng)主汽溫度低于Ⅰ值時(shí),報(bào)警;當(dāng)主汽溫度低于Ⅱ值時(shí)停機(jī),同時(shí)操作面板顯示停機(jī)原因,打印機(jī)打印停機(jī)原因:主汽溫度低停機(jī)。
(2) 記憶功能 在自動(dòng)主汽門(mén)跳閘后,由操作面板顯示出導(dǎo)致動(dòng)作原因,以便于進(jìn)行事故分析。
(3) 保護(hù)投退功能 在操作盤(pán)上設(shè)置保護(hù)投退開(kāi)關(guān),以便運(yùn)行人員和檢修人員試驗(yàn)和維修,防止在試驗(yàn)或維修過(guò)程中,以及汽輪機(jī)啟動(dòng)過(guò)程中,由于某個(gè)條件不滿足而引起的系統(tǒng)誤動(dòng)作。
(4) 打印功能 系統(tǒng)能夠?qū)崟r(shí)打印保護(hù)投退開(kāi)關(guān)的投退時(shí)間及內(nèi)容、所有保護(hù)動(dòng)作的時(shí)間和內(nèi)容。
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