Variation of main steam pressure during initial stage of fast cut back under 100% load condition:a simulation research

ZHOU Yunlong; WANG Di; CHEN Lijun

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Variation of main steam pressure during initial stage of fast cut back under 100% load condition:a simulation research

更新时间：2025-09-28

- Variation of main steam pressure during initial stage of fast cut back under 100% load condition:a simulation research
- Thermal Power Generation Vol. 43, Issue 11, Pages: 69-74(2014)
- 作者机构：
  
  1. 东北电力大学能源与动力工程学院
  2. 东北电力大学自动化工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2014
- 稿件说明：
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ZHOU Yunlong, WANG Di, CHEN Lijun. Variation of main steam pressure during initial stage of fast cut back under 100% load condition:a simulation research[J]. Thermal power generation, 2014, 43(11): 69-74.
DOI：

ZHOU Yunlong, WANG Di, CHEN Lijun. Variation of main steam pressure during initial stage of fast cut back under 100% load condition:a simulation research[J]. Thermal power generation, 2014, 43(11): 69-74. DOI：

摘要

为了研究在机组快速甩负荷(FCB)初期锅炉主蒸汽压力的动态特性

建立了300 MW机组汽水系统模型

并进行100%负荷下FCB仿真试验。结果表明:对于主蒸汽压力控制

小容量高压旁路系统同时配置一定量的动力排汽阀(PCV)效果优于大容量高压旁路系统;缩短旁路阀的快开时间

对FCB初期主蒸汽压力的调节较为有效;高压旁路系统及PCV总泄放量低于65%BMCR的机组不适合进行FCB。

Abstract

In order to investigate the dynamic characteristics of main steam pressure at the beginning of fast cut back(FCB)

the model of the steam water system for a 300 MW unit was established.Moreover

on the basis of this model

FCB simulation test under 100%load condition was conducted.The results show that:the pressure control effect of small capacity high pressure bypass equipped with pressure control valve(PCV)was better than that of the large capacity bypass;reducing the early high pressure bypass valve open time was effective for main steam pressure control during initial FCB;the unit with total pressure relief volume from high pressure bypass and PCV less than 65%BMCR was not suitable for carrying out FCB.

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