GE通用电气IC693PWR322F模块DCS控制系统

GE通用电气IC693PWR322F模块DCS控制系统

随着我国电力工业的迅速发展，火电厂的装机容量和单机容量都日益增大，热工保护系统的规模也大幅度上升，对热工保护系统的控制方式、运行水平的要求也越来越高热工保护的主要作用是当机组在启停和运行过程中发生危及设备和人身安全的故障时，自动采取保护或联锁措施，防止事故产生和避免事故扩大，从而 机组的正常启停和安全运行。

热工保护是通过对设备工作状态和机组运行参数的严密监视，发生异常情况时，及时发出报警信号，必要时自动启动或切除某些设备或系统，使机组维持原负荷运行或减负荷运行。当发生重大故障而危及机组设备时，停止机组（或某一部分）运行，避免事故进一步扩大。　

发电机组的性对本机、对电网乃至对国民经济来说都极为重要，因此，保护控制系统的，对保障机组的安全稳定运行显得十分关键。保护装置在机组正常运行时是长期不动作的，而一旦出现异常情况却要求必须可靠的立即动作，因此对于热工保护装置应有必要的监视和试验手段，以确保热工保护装置本身动作的正确和可靠。　

机组运行的，不仅依赖于各设备的性能，而且同各类保护控制装置的准确性和可靠性密切相关。电厂原有热工保护装置较落后且投运时间较长，保护系统由继电器组成控制回路，回路硬接线多，加上继电器长期带电工作，继电器触点易老化，导致接触不良，易产生拒动或误动的情况。

With the rapid development of China's power industry, the installed capacity and single capacity of thermal power plants are increasing, and the scale of thermal protection system has also risen significantly, and the requirements for the control mode and operation level of thermal protection system are also getting higher and higher. The main role of thermal protection is that when the unit is in the process of starting and stopping and operation, when the fault endangers equipment and personal safety, Automatically take protective or interlocking measures to prevent accidents and avoid the expansion of accidents, so as to ensure the normal start and stop of the unit and safe operation.

Thermal protection is through the close monitoring of the working state of the equipment and the unit operating parameters, when abnormal conditions occur, the alarm signal is issued in time, and if necessary, some equipment or systems are automatically started or removed, so that the unit can maintain the original load operation or load reduction operation. When a major failure occurs and endangers the unit equipment, stop the operation of the unit (or a part of it) to avoid further expansion of the accident.

The nature of the generator set is very important to the machine, to the power grid and even to the national economy, therefore, the protection of the control system is very critical to ensure the safe and stable operation of the unit. The protection device does not operate for a long time during the normal operation of the unit, and once an abnormal situation occurs, it requires reliable immediate action, so the thermal protection device should have the necessary monitoring and test means to ensure the correct and reliable action of the thermal protection device itself.