<p><font face="Verdana">【摘要】分析了汽轮机保护系统( ETS) 的现状, 对SIEMENS S7- 200 PLC 进行了详细介绍, 以一台25MW 背压汽轮机保护系统为例, 利<br/>用S7- 200 PLC 对该机组保护系统进行了改造, 取得了满意效果。<br/>【关键词】汽轮机; 保护系统; PLC<br/>The Application of PLC Used in Turbine Emergency Tr ip System<br/>Li Peng<br/>(Nor theast Electr ic Power Control Ltd. Shenyang 110179)<br/>【Abstract】The turbine emergency trip system ( ETS) is analyzed and the S7- 200 PLC is developed in detail. As an application example, the<br/>emergency trip system of an extraction turbine unit is reformed using the S7- 200 PLC.<br/>【Key words】Turbine, Emergency trip system (ETS), PLC</font></p>
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