】】1746-P6【【1746-P6】】

】】1746-P6【【1746-P6】】

一般中小變電站綜合自動化中的自動化設備有：可編程自動化監控裝置、可編程變壓器自動化屏、可編程微機計量屏、可編程微機線路保護屏、可編程微機同期系統、可編程中心信號屏、可編程電容屏、可編程微機直流電源系統等均應用了PLC為其智能化單元，并且都能夠掛網運行，方便地實現遙信、遙測、遙控功能，取代了傳統的RTU。本文主要介紹由OYES PLC構成的變壓器自動化部分在自動化變電站中的實現。同時適用于老式變電站的自動化改造及新式變電站的建設。

1變壓器自動化的構成方案在中小型變電站中，一臺變壓器及其配套設備一般包括：斷路器及操作單元、變壓器、變壓器控制屏、避雷器、差動保護屏、變壓器接地系統等。下面以兩種情況分別講述變壓器的自動化構成方案。

1.1變壓器及配套設備為常規設備假如斷路器及操作單元、變壓器、差動保護屏、變壓器防雷接地系統等均為不含智能單元及計算機接口的常規設備，那么只需將變壓器控制屏部份選用可編程變壓器自動化屏，就能構成比較完備的變壓器自動化系統。變電站中控室內的變壓器控制屏及其配套設備分別與可編程變壓器自動化屏通過電纜直接連接，進行信息交換。中控室或遠方的主計算機監控系統通過對可編程變壓器自動化屏的監控來實現對變壓器的監控，其中的信息交換由主計算機監控系統中的工控機與可編程變壓器自動化屏中的OYES PLC通過工業現場通訊網絡來實現。這種變壓器自動化系統一般適用于改造舊站或建設資金規模不大的自動化新站。

   1.2 變壓器及配套設備為智能化設備假如斷路器及操作單元、變壓器、差動保護屏、變壓器防雷接地系統等均已含有智能單元及計算機接口，那么變壓器控制屏部份選用可編程變壓器自動化屏，就可以非常方便地構成功能強大的變壓器自動化系統。變電站中控室內的變壓器控制屏及其配套設備分別與可編程變壓器自動化屏通過工業現場通訊網絡與中控室或遠方的主計算機監控系統進行信息交換。可編程變壓器自動化屏與變壓器及配套設備之問僅有極少量的電纜連接，整個系統顯得非常簡單。

   2可編程變壓器自動化屏的組成及實現：可編程變壓器自動化屏的硬件設備一般包括：PLC，PLC輸入/輸出信號隔離繼電器，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，智能信號測試議，小直流電源，通訊適配器等。軟件主要由OYES PLC自動化監控程序和與監控主計算機的通訊程序組成。

   2.1 OYES PLC的選型從上述的被控對象的電氣特性看出，這個系統幾乎是對開關量進行監控。溫度模擬量及信號模擬量均有智能儀表對其監控，智能儀表的輸出觸點開關量進入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。接下來應確定PLC輸入∕輸出點數，統計可編程變壓器自動化屏對變壓器及配套設備的監控點數，一般輸入不超過64點數，輸出不超過40點采用插撥方式擴展、模塊尺寸小巧，安裝使用方便、維護簡單，具有應用靈活、安全、可靠等特點。

   2.3可編程變壓器自動化屏的硬件，組成可編程變壓器自動化屏的各部件應嚴格照按電氣規范設計、連接。此外，與PLC相連的部份應嚴格按照OYES PLC廠家技術要求進行設計、連接。

   2.4 OYES PLC的自動化監控程序，變電站的變壓器組成方式不同決定了可編程變壓器自動化屏PLC的監控程序的不同。在此以一臺主變壓器為例，其開機預備條件及開機程序.其開機預備條件及開機程序如圖1，

   3可編程變壓器自動化屏的運行，可編程變壓器自動化屏在變壓器的自動化運行中處于實時監控的重要位置，它通過輸入∕輸出信號隔離繼電器按變電站變電設備的狀態∕控制信號，可編程邏輯控制器將上述信號按具體的自動化流程進行實時控制，并與監控主計算機通過網絡傳遞數據。完成變壓器的開、停，運行維護與繼電保護。它不僅使變壓器處于閉環自動控制之中，而且使變壓器自動化與測控保護系統協調運行，從而使整個變壓器處于*運行狀態。OYES PLC每個輸入∕輸出信號都有指示燈，使得變電站這個信號比較分散的場所維護檢修工作變得異常輕易。

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本公司主營產品：
DCS集散式控制系統、PLC可編程控制器、數控系統、
(CPU處理器、模塊、卡件、控制器、伺服驅動、工作站、驅動器、
馬達、 內存卡、 電源，機器人備件等)各類工控產品

主要業務: 
ABB         DCS卡件
A-B         1756，1747，1785系列 PLC CPU，
Siemens     6DD，6FX，6SC，6FC，6S5系列，
Foxboro     系統卡件，
Triconex    系統模塊，
Rexroth     力士樂全系列產品，
Modicon     停產模塊 等各類工控產品
Schneider   施耐德 140系列PLC,CPU 
Ovation     系統模塊

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High Acuity Nursing

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ACUITY EXTREME SPIN DN2 60* LOB WEDGE STOCK TRUE TEMPER STEEL SHAFT

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American Optical Child Vision Acuity Chart Projector Slide Optometry Ophthalmic

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Acuity RCX Ladies Right Handed 5 Fairway Wood 20* Graphite W/A Callaway Ball

NWOT ACUITY MENS XXL BLACK GOLF RAIN PANTS ELASTIC WAIST WITH SNAP ADJUST NYLON

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High-Acuity Nursing by Kathleen Dorman Wagner

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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

FAIRVIEW HOOPS ACUITY BLACK V NECK PULLOVER WARMUP JACKET -XLARGE

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

RVSI Acuity CiMatrix PS-50 Power Supply Adapter Kit NEW

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Acuity Mens Pleat-Front * Cotton Chino Golf Shorts sz 38 NWT Natural Tan

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Acuity Golf Ball Monogrammer

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Pullover Jacket, Golf etc., Size Men's M / Medium, by Acuity

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ACUITY 1 Wood Golf Head Cover

ACUITY 3 Wood Golf Head Cover

ACUITY 5 Wood Golf Head Cover

The Baby Boomer's Eye Chart: A Visual Acuity Program for the Middle-Aged, Paul B

Acuity golf ball monogrammer - New

Acuity Striker 125cc Utility Club Headcover/ Sock (121)

Raffertie - Visual Acuity (NEW 12" Vinyl)

OPTICAL LAB EQUIPMENT - ACUITY LENS FINER / POLISHER

Gerber Coburn Acuity Plus Finer/Polisher Lens Making for Opthalmic Optician
£3000 ex VAT, new in 2009, Full working order
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Acuity Pro All-in-one Computer and Software Bundle 23"

Acuity 002-MV4000 Mentor Vision 4000 Controller Unit ! WOW !

HAAG-STREIT Lotmar Visometer(attachment for assessment of retinal visual acuity)

Welch Allyn PROPAQ CS 246 Multiparameter Patient Monitor Wireless Acuity w/Stand

Welch Allyn PROPAQ CS 246 Multiparameter Patient Monitor Wireless Acuity w/Stand

Welch Allyn PROPAQ CS 246 Multiparameter Patient Monitor Wireless Acuity w/Stand

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17 inch LCD Vision Acuity Test Chart Linux Platform Remote Control Wall-mounted

Good Lite illuminated acuity viewer with charts

010-PV9080 ACUITY

19" Wide Screen Color LCD Acuity Chart System Projector Vision Chart Brand New

LITHONIA LIGHTING / ACUITY SWITCHPAK SPAK 8S 120/277 LIGHTING CONTROL NEW

AS-DS40-601 ACUITY DIMENSION MODULE *NEW*

NextAcuity Digital Visual Acuity - Optometry Ophthalmology Optician 
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NEW RVSI MX-600 KIT Camera ACUITY CIMATRIX IDENTICS

Protocol PROPAQ Encore 202 EL Patient Monitor, w/ Wireless Acuity, w/ Stand

Protocol PROPAQ Encore 202 EL Multiparameter Patient Monitor, Acuity, Stand

Manual Halogen Projector System Acuity Cross Slide Mirror Set Screen

ACUITY IMAGING 070-200000 REV:B FRAME GRABBER BOARD

AS-DS41-601 ACUITY DETECTION SENSOR

ACUITY IMAGING CM4000 ANALOG CAMERA AND 1:2.8 50MM LENS

Acuity Visual Sensor AS-DS11-301 New

Electrohome 38-C34ANA-01 Acuity Monitor 110-240V ! WOW !

Visual Acuity Software w/remote Optometry Ophthalmology Optician
NextAcuity Software with Remote and Red/Green Glasses

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Bausch and Lomb Vision Acuity Projector
Visual Acquiring Testing Projector w/ slide and 3 bulbs

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Acuity Golf Club Set for ages 10-15

DIGITAL ACUITY SOFTWARE with Patient Education Module
Eye Chart software, visual acuity software. NEW

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Visual Acuity Eye Chart software. NEW

RVSI ACUITY CM400 CCTV CAMERA

Juno Systems RV123/RV123P Binocular Vision/Acuity Screener w Stand

Acuity CiMatrix CM4000 B/W CCD Camera, super miniture

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