1000MW超超临界二次再热机组旁路温度控制逻辑设计

Design of Bypass Temperature Control Logic in 1000 MW Ultra-supercritical Second Reheat Units

泰州电厂二期是国内首台二次再热燃煤机组,其旁路系统采用了100%BMCR高压旁路加中低压启动旁路的三级串联旁路系统。高旁和中旁温度采用基于阀后温度的单回路闭环控制,低旁温度控制采用的是一个基于焓值的开环控制策略。

Taizhou Phase II is the ifrst double reheat coal ifred power plant in China. It has a 3 stage cascade bypass system which contains a 100%BMCR HP bypass, an IP bypass for startup and a LP bypass for startup also. HP and IP bypass temperature control is a single parameter close loop control based on the temperature after the bypass valve. LP temperature control is a open loop control based on the enthalpy.