厦门莫格电气自动化有限公司
我们提供:PLC模块,DCS卡件,ITCC卡件,AI DI AO DO模块
网络模块 计数模块 适配器模块 CPU模块 扫描模块
本特利3500系列卡件 Triconex模块 HIMA模块 ICS卡件 GE 燃机备件 艾默生DCS备件
联系人:雷琳
24小时销售热线:18050035902
Q Q : 1982497648
电话:0592-6808394
传真:0592-6514751
地址:厦门市湖里区安岭路1012号202之二单元
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控制与操作
机组LCU可以接受上位机或LCU操作面板上的输入命令,执行相应操作。机组LCU都是通过其开出继电器的空接点去动作现场设备,共使用单接点形式的开出点50多点,分别作用于各种管路的电磁阀、电路的断路器、高压油泵、润滑油泵、漏油箱油泵的电动机等现地设备输入点。
机组的控制操作需要编写以下主要流程:
1) 机组顺序控制流程。该流程包括以下几种工况:停机—空载;空载—发电;发电—空载;空载—停机。
2) 紧急停机流程。
3) 发电组事故报警流程。
4) 发电组事故报警及停机流程。
5) 高压顶起油泵控制流程。
6) 润滑油泵控制流程。
7) 漏油箱油泵控制流程。
8) 故障、事故音响处理流程。
9) 其它流程。
2.3 机组的有功和无功调节
LCU装置对机组有功(P)、无功(Q)调节是根据LCU控制面板或主机设置的P、Q值,通过对机组的导叶开度和励磁电压进行调节,使机组按给定的P、Q值运行。对于P、Q的调节,LCU输出的调节量采用脉宽的方式,调节脉冲均通过中间继电器输出给微机调速器和微机励磁调节器,在P、Q的调节中还设立了发电机电压、电流、P、Q负荷差等多种调节保护,确保P、Q调节在安全的范围内进行。PLC直接通过以太网与厂级网络进行通讯,可确保当现地LCU中操作面板出现故障,监控系统仍能从远方监控所控设备(包括机组开、停机控制、增减有、无功率等)。
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