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② 系统的运转频率的调节采用开环手动调节方式。考虑到输油系统要求平稳运行的特点,本系统不宜采用闭环调节控制。因为受整个输油系统管网波动的影响,如采用闭环控制,很容易造成系统的自动停机,或者引起整个输油系统的扰动,给输油生产的调度指挥带来不利的影响。而采用开环人为控制,通过运行时间的技术摸索,在不同工况下,人为地设定和调整变频系统的参数,即可减少部分初期投资,又可保障输油系统的平稳运行。
③ 现场设置、启动、停止以及紧急停机按钮,控制室内设上位机对运行参数进行实行显示,地方便了现场操作人员的操作和对设备运行状太的监视。
④ 优化系统的保护参数,确保输油系统的连续平稳运行。在应用于输油系统时慎重选择,并对一些保护的参数按实际需要进行设置。避免由于变频系统的保护过于灵敏而而造成输油泵停机,影响输油系统的平稳运行。
⑤ 在变频调速系统内设置适合于现场实际的报警功能,并对运行的参数,操作情况,故障情况具有详细的记录功能。
五、应用效果
南一油库2#输油泵机组变频调速系统于2003年4月18号正式投运成功,经过两个月的试运行,取得了明显的节能效果,对于在单泵运行,双泵并联运行、三泵并联运行等不同的工况下
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