管网阀门远程调控的意义与技术方案

译文:
管网阀门是供水系统中的重要设施,起到输送、关断、调节供水流量、压力和改变流向等管网调控作用,是供水系统畅通输配和管网抢修、维护、改造的重要保证措施。 管网阀门上述功能的及时实现直接影响供水安全和供水行业的服务质量。重要的是,当供水系统发生重大故障以及处理大的爆管事故时,管网阀门如不能及时有效地调控将延误处理事故时机,造成严重后果。 供水管网科学调度与实时调控首先要解决阀门远程调控问题,管网中若干重要阀门和关键阀门能否实现及时有效地调控直接影响供水安全,在调度中心直接实现对管网重要阀门远程调控操作对保证供水系统安全正常运行具有重要意义。 实现方案 供水系统实现科学调度的关键是增加控制手段和工作模式与管理制度的创新。针对xx依靠人工操作调控阀门不能及时应对突发事故处理、不利于供水管理和服务的现状,通过对项目目标、设备工作环境以及RTU、电动执行机构等因素和设备技术参数进行考察和分析后,提出利用现有管网测压RTU设备对管网重要阀门进行遥测、遥控的技术方案,以及时应对管网事故和适应工况变化,提高供水管理和服务水平。 技术方案 ①远程通讯/控制终端选型 管网阀门远程调控系统和现有SCADA系统兼容,可以充分利用现有设备、无线频谱等资源。RTU选用现有SCADA系统中采用的MOSCADRTU,根据控制目标重新编写相应控制程序。 ②上位机组态编程 在调度中心端上位机设定控制窗口和操作画面,通过基于短波电台的无线SCADA系统实时检测阀门端运行参数,通过指令控制MOSCADRTU实现对阀门的遥测、遥控功能。 ③执行机构选型 管网阀门安装在潮湿环境下的阀门井里,工作环境恶劣。为确保控制可靠性和设备安全,选用防护等级为IP68的电动头和高可靠性阀门配合作为执行机构,达到正常工作要求。 ④电源 在被控阀门点附近单位寻找合适的动力/照明电源作为被控阀门系统的工作电源。根据电源情况选择电动头的驱动电源方式。在条件许可的情况下,尽可能选用动力电源作为工作电源。 ⑤附属仪表 为及时掌握阀门调控情况和效果,在阀门下游安装压力传感器。采集的压力信号通过RTU传输到SCADA系统,平时作为测压点使用。 系统安全措施 为保证设备安全和人身安全,方案设计和项目实施采取的技术措施有: ①供电安全 由于工作场合特殊,电源箱设计有漏电保护器。电动头电源仅在进行远程调控操作时通过RTU控制接通,阀门井内设备平时和市电隔离。 ②阀门井及井盖设计选型 良好的外部环境是设备安全运行的重要因素。尽管设计选用设备能满足“浸水环境”工作,为提高系统可靠性,阀门井设计采用电信防水井盖,防止雨水侵入阀门井,为执行机构提供良好的外部工作环境。阀门井设计考虑了对井室积水作下渗处理,井室内设有渗水坑。 井室内设定位置设计安装干簧管水位开关,若因某种原因阀门井进水/渗水,水位达到设定高度时RTU会发送水位报警信息提示检修。 ③操作时管网运行安全 阀门远程操作采取“动—停—动”的间歇运行模式进行控制,减少因阀门调控产生压力波动对管网安全运行的影响。该控制过程由“调度端上位机—现场RTU”在程序控制下共同实现。 ④操作权限及系统管理 关键阀门是影响供水运行的重要设备,为防止误操作,调度中心上位机设有登陆密码和管理权限,并制定了相应的管理操作规程,如:对阀门远程调控系统操作实行操作票制度、定期对阀门进行启闭操作防止设备锈蚀、根据季节定时遥控接通电动头内置防潮xx电热装置等。

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原文:
Pipeline valve is an important water supply system facilities, play transportation, off, regulate water flow, pressure and changes in the flow control pipe network such as the role of water supply systems and the smooth transmission and distribution pipe network repairs, maintenance, and transformation of an important guarantee for measures. Pipeline valves to achieve the above functions directly affect the timely supply of safe water and water supply industry, quality of service. Importantly, when the water supply system, as well as a major failure of the blast tube to handle large incidents, pipeline valves timely and effective manner if they can not control the timing and delay dealing with incidents, resulting in serious consequences. Water supply pipe network of science and real-time dispatching control valve remote control must first solve the problem, a number of important valve in the pipe network and critical valve can be achieved directly affect the timely and efficient regulation of water supply security in the Dispatch Center directly to achieving the important pipeline valves Door remote control operation on the normal operation to ensure security of water supply system of great significance. Implementations Scientific control of the water supply system to achieve the key is to increase the means of control and mode of operation and management system for innovation. Totally dependent on manual control for the valve can not respond promptly to deal with unexpected incidents, is not conducive to the status of water management and service, through the project objectives, equipment, working environment, as well as RTU, electric actuators and equipment, technical parameters such factors as an inspection and analysis proposed use of the existing pipe network pressure measuring equipment to pipe network RTU important valve for telemetry, remote technical programs, as well as when the deal pipeline accidents and to adapt to changing conditions, improve water management and service levels. Technical Program ① long-distance communication / control terminal selection Pipeline valve remote control system is compatible with existing SCADA systems, you can make full use of existing equipment, wireless spectrum and other resources. RTU use the existing SCADA system used in MOSCADRTU, under the control objectives to re-write the appropriate control procedures. ② host computer configuration programming Host computer at the dispatch center side window, set the control and operation of the screen, through the short-wave radio station based on real-time detection of wireless SCADA system, the valve-side operating parameters through the command, control valves MOSCADRTU realize telemetry, remote control function. ③ Selection of implementing agencies Pipeline valves installed in humid environments valve wells, poor working environment. In order to ensure control reliability and equipment safety, protection grade IP68 optional electric head and valve with high reliability, as the executing agency, to the normal job requirements. ④ Power Supply Near the valve unit charged with finding the right power / lighting power supply as the power supply was charged with the valve system works. According to the head of the power to choose electric drive power mode. When conditions permit, as far as choice of power supply as a working power supply. ⑤ subsidiary Instrument To grasp the situation and effectiveness of the control valves, pressure sensors installed in the downstream valve. The pressure signal collected through the RTU transmission to the SCADA system, usually used as a pressure measuring point. System security measures In order to ensure the safety and security equipment, program design and project implementation of technical measures taken include: ① security of electricity supply As a result of a special occasion, power supply box design leakage protector. Electric power only during the first remote-control operation is controlled through the RTU connected, valve wells equipment in peacetime and municipal electrical isolation. ② valve chambers and the wells Design and Selection A favorable external environment is an important factor in the safe operation of equipment. Although the selection of equipment designed to meet the "immersion environment" to work to improve system reliability, the valve shaft is designed with waterproof covers telecommunications, preventing rain water intrusion valve well, as the executing agency to provide a good external work environment. Well valve design considerations of well water for infiltration treatment room, well equipped indoor water seepage pits. Well set the location of interior design and installation of reed level switches, Ruoyin Well for some reason the valve inlet / seepage, the water level reaches the set height water level alarm information will be sent RTU maintenance tips. ③ When you do the safe operation of pipeline Valve remote operations to take "action - stop - move" the intermittent operation mode to control and reduce the stress caused by fluctuations of the valve regulating the safe operation of pipelines. The control process by the "Scheduling client host computer - on-site RTU" together under the realization of the program control. ④ operating authority and system management The key impact of the water supply valve is an important equipment running in order to prevent misuse, control center host computer passwords and login with administrative rights, and developed a corresponding management operating procedures, such as: remote control system for valve operation system for the implementation of Operation , on a regular basis to prevent the valve to open and close operation of equipment corrosion, according to regular season, the first built-in moisture-proof electric remote control connected to dehumidifier electric devices.


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