Double reheat ultra-supercritical unit reheat steam temperature control

ZHAO Zhidan; HAO Defeng; WANG Haitao; GAO Yufeng

English

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Double reheat ultra-supercritical unit reheat steam temperature control

Thermal Power Generation Vol. 44, Issue 12, Pages: 113-118(2015)

更新时间：2025-09-28

- Double reheat ultra-supercritical unit reheat steam temperature control
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621
- Published：2015
- 稿件说明：
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ZHAO Zhidan, HAO Defeng, WANG Haitao, et al. Double reheat ultra-supercritical unit reheat steam temperature control[J]. Thermal Power Generation, 2015, 44(12): 113-118.
DOI：

ZHAO Zhidan, HAO Defeng, WANG Haitao, et al. Double reheat ultra-supercritical unit reheat steam temperature control[J]. Thermal Power Generation, 2015, 44(12): 113-118. DOI：

摘要

目前

国内对二次再热超超临界机组再热蒸汽温度控制研究仅限于仿真研究

国内首台投产的二次再热超超临界机组基于国外二次再热超超临界机组的再热蒸汽温度控制

结合成熟的超临界机组再热蒸汽温度控制策略及燃用褐煤机组再热蒸汽温度的烟气再循环控制策略的特点

构建了再热蒸汽温度控制策略。以华能安源电厂二次再热超超临界660MW机组为对象

探讨和研究其再热蒸汽温度控制策略

并分析了控制难点。结果表明:对于二次再热超超临界机组的再热蒸汽温度控制

在主蒸汽压力、中间点温度投入自动控制方式后

再投入烟气挡板、烟气再循环系统控制

可提高各种扰动下控制系统对再热蒸汽温度的调节品质

且能够满足机组运行的要求;尽管该控制策略以华能安源电厂二次再热超超临界660MW机组再热蒸汽温度控制为对象

但其仍可为不同再热系统结构的二次再热超超临界机组再热蒸汽温度控制策略设计提供参考。

Abstract

Currently

domestic research on reheat steam temperature control for secondary reheat ultra-supercritical units is limited to the simulation study.Based on the foreign secondary reheat ultra-supercritical units reheat steam temperature control

combined with sophisticated supercritical unit reheat steam temperature control strategy and flue gas recirculation control features of reheat steam temperature for units burning lignite

the reheat steam temperature control strategy for double reheat ultra-supercritical units is established.Thus

taking the secondary reheat ultra-supercritical 660 MW unit in Huaneng Anyuan Power Plant as an object

the reheat steam temperature control strategy and the difficulties in control were investigated and discussed.The results show that

for reheat steam temperature control in secondary reheat ultrasupercritical units

putting the smoke baffle and flue gas recirculation system control after the main steam pressure and middle point temperature were into automatic control

can improve the control quality of reheat steam temperature for the control system under various disturbances.Moreover

the units' operation requirements can be satisfied.Although this control strategy regards the reheat steam temperature control in 660 MW ultra-supercritical double reheat unit in Huaneng Anyuan Power Plant as the object

it can provide a reference for reheat steam temperature control strategy design for double reheat supercritical units with different reheat systems.

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