摘要
大型火力发电厂许多重要系统均配置旁路,用于启停该系统,其旁路门通常不是调节门而是全开全关的阀门,当机组正常运行时,旁路门通常处于全关状态,若机组在运行时主回路的调节门发生故障,造成被调对象失控,在此紧急情况下,及时开启旁路门能避免事故发生,防止事件进一步扩大。以某1 000 MW机组一起发电机冷氢温度高ETS跳机为例,分析事故原因,制定防范措施,提出旁路门参与控制的设想,并经试验验证,最终优化旁路门的控制逻辑,从而提高运行设备的安全可靠性。
Many key systems of large thermal power plants are equipped with bypasses for the purpose of system startup and shutdown. The bypass gates often are not adjustable gates but opened and closed valves. In normal operation, the bypass gates are closed; in the case of adjustable gate fault in the main circuit and uncontrollability of the adjusted objects, open the bypass gate in time can prevent the accidents and avoid the event deterioration. This paper takes a tripping event of ETS due to hydrogen overheat in mega-kilowatt unit as an example to analyze the accident cause and prepare preventive measures by proposing an idea of bypass gate control. Through test and verification, the control logic of bypass gate is optimized to improve safety and reliability of the operating units.
作者
范永江
FAN Yongjiang(Shenhua Guohua Ninghai Power Plant,Ningbo Zhejiang 315612, Chin)
出处
《浙江电力》
2018年第5期61-65,共5页
Zhejiang Electric Power
关键词
旁路门
控制
优化
超超临界
汽轮机
bypass gate
control
optimization
ultra-supercritical
steam turbine
作者简介
范永江（1970）,男,高级工程师,长期从事发电厂生产管理工作.
