DI880 阿克苏县
水是人们生活与生产中必不可少的一项资源，随着社会的不断发展以及人口不断增多，社会各界对水的需求量也越来越大，对供水系统的性与供水质量也提出了越来越高的要求。在工厂送水泵组中应用高压变频器实施变频节能改造，可以实现PID调节控制送水泵机组管网压力，同时也可以使负荷较低时水泵的节流损失实现大限度地降低，使机组的经济效益实现全面的提升。因此，对高压变频器在送水泵组中的应用进行探究具有至关重要的现实意义。
1、主要设备及技术参数
旧厂有6台送水泵，与扩建水厂及赤湖水厂通过合理调度，负责供应全市的生活与工业用水，根据用水量将其中的1-2台投入使用。水泵配套电机型号为Y560-8型，功率为630kW/10kV。选用HARSVERT-VA10/045变频器并配套一面手动一拖二切换柜。
2、技术改造
对送水泵房中的2#泵与4#泵实施变频节能改造，在已建成的送水泵房内对两组630kW/10kV电机机组添加变频调速系统的改造，将原设计的转子串级调速拆除改为高压变频器变频调速。采用变频器一拖二手动切换方式：(1)高压供电回路使用旧电路。(2)采取恒压变流形式来调节技改送水泵的转速，将压力维持在0.5MPa;(3)在MCC室并列安置原低压供电设备及变频柜。(4)增设10kV电力电缆，并更换Y560-8型电机1台。(5)通过硬接线来实现与PLC控制系统的数据交换，可是将通讯接口保留下来，选用Profib-us-DP作为通讯协议。(6)调速范围控制在20-50Hz。
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