300MW汽轮机危急遮断系统优化

为提高现有300 MW发电机组汽轮机危急遮断保护系统(ETS)的可靠性,将成熟的PLC控制等技术应用到保护系统控制逻辑的实现中。首先从危急遮断保护系统的原理入手进行了分析,建立了被测点和控制量之间的逻辑关系,采用了PLC控制等技术,来对双网双机双电源热备进行了优化。最后,对吴泾热电厂2台300 MW机组汽轮机危急遮断保护系统进行了优化。研究结果表明:采用该技术进行优化能极大地避免由于单点测量故障、单控制回路和单电源引起的发电机组汽轮机危急遮断保护系统的非正常保护动作。

Optimization of turbine emergency trip system with 300 MW

In order to improve reliability of the existing emergency trip system（ETS） of the 300 MW unit in a power plant,programmable logic controller（PLC） technology were applied to the protection system to realize the control logic.Firstly,the logic connection between measure points and manipulated variables was established based on the protection principles,then,the double nets dual machine double power supply for the PLC control system was put forward to optimize it.The optimization job of the emergency trip system of two 300 MW units was completed in Wujing Thermoelectric.The results show that using the optimization technology will greatly avoid the single point measurement fault,abnormal protection movements caused by single control circuit and single power.