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主營(yíng)DCS控制系統(tǒng)備件，PLC系統(tǒng)備件及機(jī)器人系統(tǒng)備件，
優(yōu)勢(shì)品牌：Allen Bradley、BentlyNevada、ABB、Emerson Ovation、Honeywell DCS、Rockwell ICS Triplex、FOXBORO、Schneider PLC、GE Fanuc、Motorola、HIMA、TRICONEX、Prosoft等各種進(jìn)口工業(yè)零部件
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控制系統(tǒng)裝備水平的確定階段
主要包括:
3.1.1確定自動(dòng)控制系統(tǒng)的設(shè)計(jì)原則
一般地, 設(shè)計(jì)應(yīng)本著技術(shù)成熟, 裝備先進(jìn), 適用性強(qiáng),可靠性高的原則進(jìn)行。
3.1.2 確定分布式控制系統(tǒng)的基本組成
分布式控制系統(tǒng)主要由控制站單元、操作顯示站單元以及數(shù)據(jù)通信總線組成。各站點(diǎn)單元由數(shù)據(jù)通信總線聯(lián)結(jié)在一起組成控制系統(tǒng), 并通過(guò)數(shù)據(jù)通信總線進(jìn)行相互間的通信,實(shí)現(xiàn)系統(tǒng)內(nèi)部的數(shù)據(jù)共享。
3.1.3 確定自動(dòng)控制系統(tǒng)的應(yīng)用功能層次, 并提出各個(gè)應(yīng)用功能層次上對(duì)系統(tǒng)硬件和軟件的基本要求
在進(jìn)行應(yīng)用功能層次劃分時(shí),現(xiàn)場(chǎng)檢測(cè)、傳動(dòng)級(jí)和基礎(chǔ)自動(dòng)化級(jí)是必需的;至于過(guò)程監(jiān)控級(jí)和信息管理級(jí),則應(yīng)根據(jù)工程項(xiàng)目的資金情況及用戶的生產(chǎn)管理水平?jīng)Q定取舍。
3.1.4提出自動(dòng)控制系統(tǒng)的合理控制范圍及主要控制和管理功能
一般地, 高爐生產(chǎn)主體工藝系統(tǒng)宜納入控制范圍。
3.1.5 推薦幾種典型的分布式控制系統(tǒng)構(gòu)成方案
高爐自動(dòng)控制上所應(yīng)用的分布式控制系統(tǒng), 一般按對(duì)電氣邏輯順序控制功能與儀表連續(xù)調(diào)節(jié)控制功能的不同側(cè)重分為兩類: 一類是電氣邏輯順序控制功能與儀表連續(xù)調(diào)節(jié)控制功能均由同一類型控制器進(jìn)行控制的全DCS 控制系統(tǒng),如美國(guó)西屋(Westinghouse) 公司的OVATION 控制系統(tǒng), 德國(guó)西門子公司的PCS7 控制系統(tǒng)等; 另一類是電氣邏輯順序控制功能與儀表連續(xù)調(diào)節(jié)控制功能分別由不同類型控制器進(jìn)行控制的“PLC + DCS”控制系統(tǒng), 如由美國(guó)霍尼韋爾公司的儀表連續(xù)調(diào)節(jié)控制器HPM 與美國(guó)GE 公司的電氣邏輯順序控制PLC 共同組成的Total Plant 控制系統(tǒng),由日本橫河公司的儀表連續(xù)調(diào)節(jié)控制器FCS 與日本安川公司的電氣邏輯順序控制器CP23500H 共同組成的控制系統(tǒng)等。
3.1.6提出國(guó)內(nèi)外設(shè)備分交意見(jiàn)。
3.1.7進(jìn)行自動(dòng)控制系統(tǒng)投資估算。
3. 2 分布式控制系統(tǒng)綜合評(píng)估階段
主要從以下幾個(gè)方面對(duì)用戶認(rèn)可的幾種系統(tǒng)構(gòu)成方案進(jìn)行綜合評(píng)估和比較,選出在技術(shù)性能、使用性能、可靠性等方面均比較出色的控制系統(tǒng)。
(1) 對(duì)控制系統(tǒng)控制站單元的技術(shù)性能進(jìn)行評(píng)估。包括現(xiàn)場(chǎng)數(shù)據(jù)采集能力及信號(hào)隔離措施;輸入及輸出信號(hào)處理精度; 內(nèi)存容量及存儲(chǔ)數(shù)據(jù)掉電保持時(shí)間;模件能否帶電插拔及容錯(cuò)能力;應(yīng)用軟件的組態(tài)方式。
(2) 對(duì)控制系統(tǒng)操作站單元的技術(shù)性能進(jìn)行評(píng)估。包括內(nèi)存容量及CRT 分辨率;實(shí)時(shí)多任務(wù)操作系統(tǒng)的可靠性; 是否具備多種應(yīng)用支持軟件(如圖形組態(tài)軟件, 數(shù)據(jù)庫(kù)管理軟件, 報(bào)表生成軟件, 歷史趨勢(shì)軟件, 故障報(bào)警軟件, 以及系統(tǒng)維護(hù)軟件等) ;圖形軟件的組態(tài)方式。
(3) 對(duì)控制系統(tǒng)通信單元的技術(shù)性能進(jìn)行評(píng)估。包括通信網(wǎng)絡(luò)結(jié)構(gòu)及網(wǎng)絡(luò)控制方式; 通信網(wǎng)絡(luò)容量及數(shù)據(jù)傳輸速率;通信網(wǎng)絡(luò)容錯(cuò)能力。
(4) 對(duì)控制系統(tǒng)綜合性能進(jìn)行評(píng)估。包括控制系統(tǒng)的開(kāi)放性和可擴(kuò)展性; 是否兼容其它自動(dòng)化軟、硬件產(chǎn)品;是否很容易地對(duì)系統(tǒng)硬件和軟件進(jìn)行升級(jí);控制系統(tǒng)的可靠性;系統(tǒng)的容錯(cuò)能力和平均無(wú)故障時(shí)間是否滿足要求等; 控制系統(tǒng)的經(jīng)濟(jì)性,著重考察系統(tǒng)的性能價(jià)格比;控制系統(tǒng)在高爐控制上的的應(yīng)用業(yè)績(jī); 控制系統(tǒng)供應(yīng)商的售后服務(wù)能力。
3. 3 控制系統(tǒng)初步設(shè)計(jì)階段
主要是以控制系統(tǒng)裝備水平階段確定的原則為依據(jù), 以對(duì)分布式控制系統(tǒng)綜合評(píng)估后得出的結(jié)論為基礎(chǔ), 并結(jié)合工藝實(shí)際情況進(jìn)行控制系統(tǒng)的初步配置。其主要工作內(nèi)容包括:
(1) 結(jié)合工藝及用戶意見(jiàn)確定控制系統(tǒng)控制范圍,分布式控制系統(tǒng)基本構(gòu)成方案和主要控制、管理功能。
(2) 明確三電專業(yè)分工,對(duì)三電專業(yè)各自應(yīng)完成的控制及管理功能進(jìn)行劃分。Determination stage of control system equipment level
It mainly includes:
3.1.1 Determine the design principle of automatic control system
Generally, the design shall be carried out based on the principles of mature technology, advanced equipment, strong applicability and high reliability.
3.1.2 Determine the basic composition of the distributed control system
The distributed control system is mainly composed of control station unit, operation display station unit and data communication bus. Each station unit is connected by the data communication bus to form the control system, and communicates with each other through the data communication bus to realize the data sharing within the system.
3.1.3 Determine the application function level of the automatic control system, and propose the basic requirements for system hardware and software at each application function level
Field detection, transmission level and basic automation level are necessary when dividing application function levels; As for the process monitoring level and information management level, the choice should be made according to the capital situation of the project and the production management level of users.
3.1.4 Propose the reasonable control range and main control and management functions of the automatic control system
Generally, the main process system of blast furnace production should be included in the control scope.
3.1.5 Recommend several typical distributed control system composition schemes
The distributed control system applied to the automatic control of blast furnace is generally divided into two categories according to the different emphasis on the electrical logic sequence control function and the continuous regulation control function of the instrument: one is the full DCS control system whose electrical logic sequence control function and the continuous regulation control function of the instrument are controlled by the same type of controller, such as the OVATION control system of Westinghouse, PCS7 control system of Siemens, Germany; The other is the "PLC+DCS" control system where the electrical logic sequential control function and the instrument continuous regulation control function are controlled by different types of controllers, such as the Total Plant control system composed of the instrument continuous regulation controller HPM of Honeywell and the electrical logic sequential control PLC of GE, The control system consists of the instrument continuous regulation controller FCS of Yokogawa Corporation of Japan and the electrical logic sequence controller CP23500H of Yaskawa Corporation of Japan.
3.1.6 Put forward opinions on domestic and foreign equipment delivery.
3.1.7 Estimate the investment of automatic control system.
3.2 Integrated evaluation stage of distributed control system
The following aspects are mainly used to comprehensively evaluate and compare several system composition schemes recognized by users, and select the control systems that are excellent in technical performance, use performance, reliability, etc.
(1) Evaluate the technical performance of the control station unit of the control system. Including on-site data acquisition capability and signal isolation measures; Input and output signal processing accuracy; Memory capacity and storage data power-off retention time; Whether the module can be plugged and unplugged with power and has fault tolerance capability; Configuration mode of application software.
(2) Evaluate the technical performance of the control system operation station unit. Including memory capacity and CRT resolution; Reliability of real-time multitask operating system; Whether there are various application support software (such as graphic configuration software, database management software, report generation software, historical trend software, fault alarm software, and system maintenance software); Configuration mode of graphic software.
(3) Evaluate the technical performance of the control system communication unit. Including communication network structure and network control mode; Communication network capacity and data transmission rate; Fault tolerance of communication network.
(4) Evaluate the comprehensive performance of the control system. Including the openness and scalability of the control system; Whether it is compatible with other automation software and hardware products; Whether the system hardware and software can be easily upgraded; Reliability of control system; Whether the fault tolerance and MTBF of the system meet the requirements; The economy of the control system, focusing on the performance price ratio of the system; Application performance of control system in blast furnace control; After sales service capability of the control system supplier.
3.3 Preliminary design stage of control system
It is mainly based on the principle of determining the equipment level of the control system, based on the conclusion obtained after the comprehensive evaluation of the distributed control system, and combined with the actual process conditions to conduct the preliminary configuration of the control system. The main work contents include:
(1) The control scope of the control system, the basic composition scheme of the distributed control system and the main control and management functions are determined based on the process and user's opinions.
(2) Clarify the division of work of the three electricity disciplines, and divide the control and management functions that the three electricity disciplines should complete.