】】1746-P6【【1746-P6】】

】】1746-P6【【1746-P6】】

一般中小變電站綜合自動(dòng)化中的自動(dòng)化設(shè)備有：可編程自動(dòng)化監(jiān)控裝置、可編程變壓器自動(dòng)化屏、可編程微機(jī)計(jì)量屏、可編程微機(jī)線路保護(hù)屏、可編程微機(jī)同期系統(tǒng)、可編程中心信號(hào)屏、可編程電容屏、可編程微機(jī)直流電源系統(tǒng)等均應(yīng)用了PLC為其智能化單元，并且都能夠掛網(wǎng)運(yùn)行，方便地實(shí)現(xiàn)遙信、遙測(cè)、遙控功能，取代了傳統(tǒng)的RTU。本文主要介紹由OYES PLC構(gòu)成的變壓器自動(dòng)化部分在自動(dòng)化變電站中的實(shí)現(xiàn)。同時(shí)適用于老式變電站的自動(dòng)化改造及新式變電站的建設(shè)。

1變壓器自動(dòng)化的構(gòu)成方案在中小型變電站中，一臺(tái)變壓器及其配套設(shè)備一般包括：斷路器及操作單元、變壓器、變壓器控制屏、避雷器、差動(dòng)保護(hù)屏、變壓器接地系統(tǒng)等。下面以?xún)煞N情況分別講述變壓器的自動(dòng)化構(gòu)成方案。

1.1變壓器及配套設(shè)備為常規(guī)設(shè)備假如斷路器及操作單元、變壓器、差動(dòng)保護(hù)屏、變壓器防雷接地系統(tǒng)等均為不含智能單元及計(jì)算機(jī)接口的常規(guī)設(shè)備，那么只需將變壓器控制屏部份選用可編程變壓器自動(dòng)化屏，就能構(gòu)成比較完備的變壓器自動(dòng)化系統(tǒng)。變電站中控室內(nèi)的變壓器控制屏及其配套設(shè)備分別與可編程變壓器自動(dòng)化屏通過(guò)電纜直接連接，進(jìn)行信息交換。中控室或遠(yuǎn)方的主計(jì)算機(jī)監(jiān)控系統(tǒng)通過(guò)對(duì)可編程變壓器自動(dòng)化屏的監(jiān)控來(lái)實(shí)現(xiàn)對(duì)變壓器的監(jiān)控，其中的信息交換由主計(jì)算機(jī)監(jiān)控系統(tǒng)中的工控機(jī)與可編程變壓器自動(dòng)化屏中的OYES PLC通過(guò)工業(yè)現(xiàn)場(chǎng)通訊網(wǎng)絡(luò)來(lái)實(shí)現(xiàn)。這種變壓器自動(dòng)化系統(tǒng)一般適用于改造舊站或建設(shè)資金規(guī)模不大的自動(dòng)化新站。

   1.2 變壓器及配套設(shè)備為智能化設(shè)備假如斷路器及操作單元、變壓器、差動(dòng)保護(hù)屏、變壓器防雷接地系統(tǒng)等均已含有智能單元及計(jì)算機(jī)接口，那么變壓器控制屏部份選用可編程變壓器自動(dòng)化屏，就可以非常方便地構(gòu)成功能強(qiáng)大的變壓器自動(dòng)化系統(tǒng)。變電站中控室內(nèi)的變壓器控制屏及其配套設(shè)備分別與可編程變壓器自動(dòng)化屏通過(guò)工業(yè)現(xiàn)場(chǎng)通訊網(wǎng)絡(luò)與中控室或遠(yuǎn)方的主計(jì)算機(jī)監(jiān)控系統(tǒng)進(jìn)行信息交換?？删幊套儔浩髯詣?dòng)化屏與變壓器及配套設(shè)備之問(wèn)僅有極少量的電纜連接，整個(gè)系統(tǒng)顯得非常簡(jiǎn)單。

   2可編程變壓器自動(dòng)化屏的組成及實(shí)現(xiàn)：可編程變壓器自動(dòng)化屏的硬件設(shè)備一般包括：PLC，PLC輸入/輸出信號(hào)隔離繼電器，近地操作按鈕及故障事故指示燈、警器、智能變壓器油溫度巡檢儀，智能信號(hào)測(cè)試議，小直流電源，通訊適配器等。軟件主要由OYES PLC自動(dòng)化監(jiān)控程序和與監(jiān)控主計(jì)算機(jī)的通訊程序組成。

   2.1 OYES PLC的選型從上述的被控對(duì)象的電氣特性看出，這個(gè)系統(tǒng)幾乎是對(duì)開(kāi)關(guān)量進(jìn)行監(jiān)控。溫度模擬量及信號(hào)模擬量均有智能儀表對(duì)其監(jiān)控，智能儀表的輸出觸點(diǎn)開(kāi)關(guān)量進(jìn)入PLC，因此OYES PLC只需選用基本模塊及通訊模塊，而不需非凡模塊。接下來(lái)應(yīng)確定PLC輸入∕輸出點(diǎn)數(shù)，統(tǒng)計(jì)可編程變壓器自動(dòng)化屏對(duì)變壓器及配套設(shè)備的監(jiān)控點(diǎn)數(shù)，一般輸入不超過(guò)64點(diǎn)數(shù)，輸出不超過(guò)40點(diǎn)采用插撥方式擴(kuò)展、模塊尺寸小巧，安裝使用方便、維護(hù)簡(jiǎn)單，具有應(yīng)用靈活、安全、可靠等特點(diǎn)。

   2.3可編程變壓器自動(dòng)化屏的硬件，組成可編程變壓器自動(dòng)化屏的各部件應(yīng)嚴(yán)格照按電氣規(guī)范設(shè)計(jì)、連接。此外，與PLC相連的部份應(yīng)嚴(yán)格按照OYES PLC廠家技術(shù)要求進(jìn)行設(shè)計(jì)、連接。

   2.4 OYES PLC的自動(dòng)化監(jiān)控程序，變電站的變壓器組成方式不同決定了可編程變壓器自動(dòng)化屏PLC的監(jiān)控程序的不同。在此以一臺(tái)主變壓器為例，其開(kāi)機(jī)預(yù)備條件及開(kāi)機(jī)程序.其開(kāi)機(jī)預(yù)備條件及開(kāi)機(jī)程序如圖1，

   3可編程變壓器自動(dòng)化屏的運(yùn)行，可編程變壓器自動(dòng)化屏在變壓器的自動(dòng)化運(yùn)行中處于實(shí)時(shí)監(jiān)控的重要位置，它通過(guò)輸入∕輸出信號(hào)隔離繼電器按變電站變電設(shè)備的狀態(tài)∕控制信號(hào)，可編程邏輯控制器將上述信號(hào)按具體的自動(dòng)化流程進(jìn)行實(shí)時(shí)控制，并與監(jiān)控主計(jì)算機(jī)通過(guò)網(wǎng)絡(luò)傳遞數(shù)據(jù)。完成變壓器的開(kāi)、停，運(yùn)行維護(hù)與繼電保護(hù)。它不僅使變壓器處于閉環(huán)自動(dòng)控制之中，而且使變壓器自動(dòng)化與測(cè)控保護(hù)系統(tǒng)協(xié)調(diào)運(yùn)行，從而使整個(gè)變壓器處于*運(yùn)行狀態(tài)。OYES PLC每個(gè)輸入∕輸出信號(hào)都有指示燈，使得變電站這個(gè)信號(hào)比較分散的場(chǎng)所維護(hù)檢修工作變得異常輕易。

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本公司主營(yíng)產(chǎn)品：
DCS集散式控制系統(tǒng)、PLC可編程控制器、數(shù)控系統(tǒng)、
(CPU處理器、模塊、卡件、控制器、伺服驅(qū)動(dòng)、工作站、驅(qū)動(dòng)器、
馬達(dá)、 內(nèi)存卡、 電源，機(jī)器人備件等)各類(lèi)工控產(chǎn)品

主要業(yè)務(wù): 
ABB         DCS卡件
A-B         1756，1747，1785系列 PLC CPU，
Siemens     6DD，6FX，6SC，6FC，6S5系列，
Foxboro     系統(tǒng)卡件，
Triconex    系統(tǒng)模塊，
Rexroth     力士樂(lè)全系列產(chǎn)品，
Modicon     停產(chǎn)模塊 等各類(lèi)工控產(chǎn)品
Schneider   施耐德 140系列PLC,CPU 
Ovation     系統(tǒng)模塊

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Acuity Cadet P/S Wedge

LOT OF THREE BLACK & BURGANDY LEATHER ACUITY GOLF CLUB HEAD COVERS

Amway NUTRILITE Vision Health with Lutein For Eye Health &Visual Acuity 60tabs

RAFFERTIE VISUAL ACUITY EP NEW VINYL

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Verbal Command: Expand Your Vocabulary & Verbal Acuity by Verbal Power, Chris...

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