BENTLY 330180-90-00監(jiān)測器模塊
控制系統(tǒng)采用DSP+FPGA+ARM三核技術(shù)，對此種轉(zhuǎn)矩波動大的螺桿式壓縮機(jī)采用無PG（速度傳感器）的電壓開環(huán)（SVC）控制。一方面可輕松實(shí)現(xiàn)低轉(zhuǎn)速、大轉(zhuǎn)矩的帶重載啟動；另一方面，當(dāng)負(fù)荷波動瞬間轉(zhuǎn)矩增大時，內(nèi)置的DSP高速數(shù)字處理芯片可在100毫秒內(nèi)迅速降低運(yùn)行轉(zhuǎn)速，提高輸出的電磁轉(zhuǎn)矩，防止因負(fù)載瞬間波動電流突然增大造成的設(shè)備頻繁跳閘，滿足現(xiàn)場運(yùn)行工況要求。
BENTLY 330180-90-00監(jiān)測器模塊此外，對原料提純分離中的壓縮機(jī)組使用高壓變頻調(diào)速還有如下幾大優(yōu)勢：
電機(jī)為額定頻率60HZ的變頻電機(jī)，采用直驅(qū)方式，中間省去了增速箱等附屬裝置，降低了系統(tǒng)損耗。使用變頻傳動，滿足轉(zhuǎn)速輸出要求，其輸出頻率范圍0.5～120HZ，頻率分辨率0.01HZ；提高了傳動效率和控制精度。
采用DCS集中控制，起停采用現(xiàn)場硬接線按鈕，不僅滿足了設(shè)備運(yùn)行的安全可靠，而且還提高了工藝流程優(yōu)化調(diào)整和監(jiān)控的實(shí)時性和靈活性。原料氣儲罐容積有限從而造成壓縮機(jī)吸氣壓力不穩(wěn)定，負(fù)荷隨時間無規(guī)律波動。使用變頻調(diào)速可在壓縮機(jī)出口加裝壓力傳感變送器，變頻器可根據(jù)負(fù)荷變化實(shí)時調(diào)整運(yùn)行轉(zhuǎn)速，實(shí)現(xiàn)輸出壓力恒定的閉環(huán)控制。運(yùn)行頻率越低，制冷壓縮機(jī)的能耗也越低，從而在滿足工藝要求的條件下能實(shí)現(xiàn)一定的節(jié)能降耗。
化工企業(yè)生產(chǎn)設(shè)備繁多，經(jīng)常大批量同時啟動時容易造成廠內(nèi)母線電壓陡降，引起設(shè)備欠壓跳閘。GD5000系列變頻器具有優(yōu)良的抗電網(wǎng)電壓波動性能。網(wǎng)側(cè)電壓在+10%～-15%之間波動時可做到滿載輸出。同時具有AVR功能，能夠根據(jù)母線電壓的波動自動調(diào)整輸出電壓。網(wǎng)側(cè)電壓在短時間小于85%～65%額定值或大于110%～120%額定值時，高壓變頻器降額運(yùn)行不停機(jī)，可保證壓縮機(jī)持續(xù)運(yùn)行。
?作為工藝循環(huán)中的關(guān)鍵負(fù)載，GD5000系列變頻器具有功率單元工作情況（溫度、直流母線電壓、電流等）的實(shí)時監(jiān)控和單元自動旁路功能。大運(yùn)行體系，是變電設(shè)備運(yùn)行集中監(jiān)控業(yè)務(wù)與各級電網(wǎng)電度業(yè)務(wù)的高度融合從而實(shí)現(xiàn)“調(diào)控一體化”的統(tǒng)一體系，是目前電網(wǎng)控制的發(fā)展趨勢。
為推進(jìn)大運(yùn)行體系建設(shè)及按蒙東電力公司網(wǎng)損在線計算分析系統(tǒng)的要求，建設(shè)呼倫貝爾地調(diào)電量采集系統(tǒng)Jiangsu Province. This PLC has high performance price ratio, short supply cycle, built-in programming communication mini-b small U port, and can complete the task of program upload and download by using an ordinary u port data cable (I used the data cable of the previous old Nokia mobile phone) without a special programming cable. It is fast and easy to use. The host CPU (fx3ga-24mr-cm) expands a special adapter fx3u-485adp-mb for RS485 communication through fx3g-cnv-adp connection. Fx3u-485adp-mb supports standard Modbus protocol. The total extended distance of communication given by the official is 500 meters. Mitsubishi n:n network is used in this system, and the communication is set at 9600 baud rate. Six sets (including main and sub stations) are networked. The communication is also stable and reliable within nearly 1000 meters underground. The whole set of equipment operates normally. Hulusu coal washing plant is one of the few large-scale coal washing plants under construction in China with a centralized control system i/o of 5000 points. NA400 PLC produced by NANTUO Aotuo company is another 10 million ton coal washing project after the centralized control system of China coal gold ocean Coal Preparation Plant No. 3 (12million tons). At present, the commissioning of the main plant of the project is being carried out in a tense and orderly manner. As the core equipment of the whole control system, NANDA Aotuo's NA400 series PLC products have excellent performance and high testability in this project. The reliable and convenient
