Primary frequency modulation of multivariable co-optimization for 1000MW units

CHANG Dongfeng; WANG Wei; JIANG Hao; WANG Qian; FU Yiwei; GAO Lin; LIU Hao

doi:10.19666/j.rlfd.201801004

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Primary frequency modulation of multivariable co-optimization for 1000MW units

更新时间：2025-09-28

- Primary frequency modulation of multivariable co-optimization for 1000MW units
- Thermal Power Generation Vol. 47, Issue 11, Pages: 123-128(2018)
- 作者机构：
  
  1. 西安西热节能技术有限公司
  2. 西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201801004
  CLC： TK323;TM621
- Published Online：24 October 2018，
  
  Published：2018
- 稿件说明：
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CHANG Dongfeng, WANG Wei, JIANG Hao, et al. Primary frequency modulation of multivariable co-optimization for 1000MW units[J]. Thermal power generation, 2018, 47(11): 123-128.
DOI：

CHANG Dongfeng, WANG Wei, JIANG Hao, et al. Primary frequency modulation of multivariable co-optimization for 1000MW units[J]. Thermal power generation, 2018, 47(11): 123-128. DOI： 10.19666/j.rlfd.201801004.

摘要

为经济有效地提升深度调峰下火电机组一次调频响应能力

提出了一种多变量协同优化一次调频方案

该方案包括主蒸汽调节阀节流、凝结水变负荷、旁路给水调节以及调节附加抽汽等技术

通过变负荷特性试验对各项技术一次调频特性进行了详细分析

充分发挥了各项技术的优势及耦合增益

并成功应用于某超超临界1 000 MW机组。优化后该机组在一次调频响应能力不降低的基础上

主蒸汽调节阀的运行开度平均提高了5.3%

高压缸运行效率平均提高3.1%

折合供电煤耗降低约1.5 g/(kW·h)

节能效果显著。该技术可应用于火电机组一次调频和自动发电控制(AGC)优化

以及提高机组灵活性等技术改造项目。

Abstract

Aiming to effectively improve the responsiveness of primary frequency modulation of thermal power unit under deep peaking

the scheme of primary frequency modulation technology of multivariable co-optimization is carried out in this study. This scheme includes throttling of main steam regulating valve

condensed water throttling

bypassing feedwater regulation

additional extraction steam adjustment and other technologies. The characteristics of primary frequency modulation have been analyzed in detail through various variable load characteristics tests

which give full play to the advantages and coupling gains of various technologies and have been successfully applied in a 1 000 MW USC unit. On the base of maintaining the responsiveness of primary frequency modulation

the operation opening of main steam regulating valve and the operation efficiency of high pressure cylinder increase by 5.3% and 3.1% on average

equal coal consumption reduces about 1.5 g/(kW·h)

which has considerable economic benefit. The multivariable co-optimization technology in this study can be applied to the optimization of primary frequency modulation and AGC of thermal power units and the technological transformation projects of improving the flexibility of thermal power unit.

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