COMPARISION OF RUN BACK STRATEGY BETWEEN SUPERCRITICAL AND SUBCRITICAL UNITS

LI Hua-dongShandong Provincial Electric Power Research Institute

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COMPARISION OF RUN BACK STRATEGY BETWEEN SUPERCRITICAL AND SUBCRITICAL UNITS

Thermal Power Generation Vol. 38, Issue 7, Pages: 14-17(2009)

更新时间：2025-09-28

- COMPARISION OF RUN BACK STRATEGY BETWEEN SUPERCRITICAL AND SUBCRITICAL UNITS
- 作者机构：
  
  山东电力研究院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK323
- Published：2009
- 稿件说明：
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LI Hua-dongShandong Provincial Electric Power Research Institute. COMPARISION OF RUN BACK STRATEGY BETWEEN SUPERCRITICAL AND SUBCRITICAL UNITS[J]. Thermal Power Generation, 2009, 38(7): 14-17.
DOI：

LI Hua-dongShandong Provincial Electric Power Research Institute. COMPARISION OF RUN BACK STRATEGY BETWEEN SUPERCRITICAL AND SUBCRITICAL UNITS[J]. Thermal Power Generation, 2009, 38(7): 14-17. DOI：

摘要

辅机故障快速减负荷(RB)功能的可靠性对于防止机组非正常停机、提高电网稳定性具有重要意义。在亚临界机组RB控制策略的基础上

针对超临界机组的运行特性

阐述了超临界机组RB控制策略与亚临界机组RB控制策略相同和特殊之处。亚临界机组RB时

主蒸汽压力变化率小于等于1 MPa/min时不会出现虚假汽包水位;超临界机组RB时

主蒸汽压力的降速率设定值大于亚临界机组的降速率设定值。

Abstract

The reliability of run back(RB) function has important signigicance for preventing abnormal shutdown of the units and for enhancing stability of the power grid.Based on the RB control strategy of the subcritical units

directing against the operation characters of supercritical units

the identical and exceptional points in RB control strategy of supercritical and subcritical units have been expounded.In the case of RB on subcritical unit

false water level in the drum can't appear under variation velocity of the main steam pressure≤1 MPa/min

but

in the event of RB on supercritical unit

the set value for velocity of load reduction of the main steam pressure is greater than that of subcritical unit.

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