6ES5755-1AA12 现货西门子

安全运行监视及事件报警功能

　　（1）主要设备安全运行实时监视

　　计算机监控系统可以使运行人员通过主机兼操作员工作站显示器屏幕对全厂主要设备运行状态和运行参数进行实时监视，包括状态变化监视、越限检查、过程监视、历史趋势分析和监控系统异常监视。

　　·越限检查：主要针对主机定子电流、油温、冷却水压力、定子线圈和铁心的温度计及其它被监视参数，检查设备异常状态并发出报警。

　　·过程监视：监视机组开停机条件、开停机进程、状态转换过程的顺序及转换时间等，并上送至电站控制层。监视机组各种运行工况的转换过程所需要的操作步骤，在发生过程阻滞时，显示阻滞原因，并由机组现地控制单元将机组转换到安全状态。（如开机、停机、冷却水状况等）

　　·趋势分析：分析机组运行参数的变化。（如机组轴承温度趋势监视、发电机温度变化趋势监视、机组电压和负荷变化、励磁电压和电流变化等）

　　·监控系统异常监视：对机组现地控制单元硬件、软件故障自动监视，报警并上送数据信息给电站控制层。实时监视监控系统本身的工作状况，通信状态等。

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