公司新闻
  • 您现在的位置:首页 > 新闻资讯 > 公司新闻 >
  • 净化工程中的变频器控制系统的使用
    来源:http://www.jnyhrs.com 浏览: 发布日期:2020-12-21
    1.保护发电机,以确保净化设备的安全可靠运行。
    1. Protect the generator to ensure the safe and reliable operation of the purification equipment.
    净化工程的阶段有3套过程设备。主电源使用3台天然气发电机组。共3×1 840 kW,2用1备。1台发电机组接在Ⅰ段母线上,2台发电机组接在Ⅱ段母线上。当1台发电机组因故停止供电,净化工程配电装置有一段母线失电,该段母线所供负荷有可能是2套装置的负荷,为了使2套装置不因发电机故障而停产,接在该段母线上的MDEA循环泵、再生塔回流泵、TEG循环泵同时自启动,在这瞬间只有1台发电机组运行(备用发电机组还未启动正常运行),带一段母线的正常负荷和另一段母线同时自启动的负荷。
    There are three sets of process equipment in the first stage of the purification project. Three natural gas generating sets are used for the main power supply. A total of 3 × 1 840 kW, 2 for use and 1 for standby. One generator set is connected to section I bus, and two generator sets are connected to Section II bus. When one generator unit stops power supply for some reason, a section of bus bar of power distribution device of purification project loses power, and the load supplied by this section of bus may be the load of two sets of devices. In order to make the two sets of devices stop production due to generator failure, MDEA circulating pump, regeneration tower reflux pump and TEG circulating pump connected to the bus bar will start automatically at the same time. At this moment, only one generator set is in operation (standby generator set) The normal load with one section of bus and the load of self starting of another bus at the same time.
    经计算,这瞬间发电机组能承受的大冲击电流为2 957A,而此时厂内瞬间冲击电流达3772 A,必然会导致发电机组全部甩负荷,进而迫使全厂停产。净化工程中,采用变频器后,全厂冲击电流降至1 768 A,这样一期工程时3台发电机组可以满足要求。
    According to the calculation, the maximum impulse current that the generator set can bear is 2957a, while the instantaneous impulse current in the plant is 3772 a, which will inevitably lead to load rejection of all generating units and force the whole plant to stop production. In the purification project, after using frequency converter, the impulse current of the whole plant is reduced to 1768 a, so that three generating units can meet the requirements in the first phase project.
    净化工程
    Purification engineering
    2.控制、接线系统优化
    2. Optimization of control and wiring system
    空气净化工程
    在净化工程设计选用了变频器,变频器的特点在于有良好的人机介面,LCD显示,安装方便,操作简单。显示面板可以直接显示变频器的输出电压、电流和频率以及电机运行消耗的能量、运行时间等。其净化工程控制系统是基于变频器的特殊控制程序进行控制的,具有工频和变频操作的方式,且这两种操作方式互锁,并相互独立;能详细、准确地反应变频器工况。:上述接线设计有以下特点:
    In the purification project design, the frequency converter is selected. The characteristics of the frequency converter are good man-machine interface, LCD display, convenient installation and simple operation. The display panel can directly display the output voltage, current and frequency of the inverter, as well as the energy consumed by motor operation, operation time, etc. The purification engineering control system is controlled based on the special control program of frequency converter, with power frequency and frequency conversion operation mode, and the two operation modes are interlocked and independent of each other; it can reflect the working condition of frequency converter in detail and accurately. The above wiring design has the following features:
    a)变频器加装接触器作旁路,提高了供电的可靠性。
    a) The frequency converter is equipped with contactor as bypass, which improves the reliability of power supply.
    b)变频器采用手动、自动启动两种方式,可通过转换开关来切换、选择。净化工程中,参与自启动的泵可以分批自启动,不仅可以减小启动电流,而且还可以避免双电源切换时,工艺装置重新开车。
    b) The frequency converter adopts manual and automatic starting modes, which can be switched and selected by the transfer switch. In the purification project, the pumps participating in the self starting can start automatically in batches, which can not only reduce the starting current, but also avoid the process unit restart when the dual power supply is switched.
    c)变频器运行方式可开环运行,也可闭环运行。开环运行时,采用手动调节电位器。在净化工程设计中,考虑到场地天然气处理规模较大,重要性十分突出,初期就采用这种新的控制系统,还没有实践经验。
    c) The operation mode of frequency converter can be open-loop or closed-loop. In open-loop operation, the potentiometer is adjusted manually. In the design of purification project, considering the large scale of natural gas treatment on site and its importance is very prominent, this new control system has been adopted in the initial stage, and there is no practical experience.
    本文由空气净化工程整理发布,您是不是对这些内容有所了解了呢?更多的内容请点击:http://www.jnyhrs.com 我们会有更多精彩内容等你查看。
    This article is organized and released by air purification project. Do you know something about these contents? For more information, please click: http://www.jnyhrs.com  We'll have a lot more to see.