Multivariable optimization strategy of primary frequency modulation for an ultra-supercritical 1000 MW unit

WANG Qian; HUI Wentao; LYU Yongtao; LIU Hao; GAO Lin; CHANG Dongfeng; WANG Wei

doi:10.19666/j.rlfd.201804114

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Multivariable optimization strategy of primary frequency modulation for an ultra-supercritical 1000 MW unit

Thermal Power Generation Vol. 48, Issue 1, Pages: 24-29(2019)

更新时间：2025-09-28

- Multivariable optimization strategy of primary frequency modulation for an ultra-supercritical 1000 MW unit
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 西安西热节能技术有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201804114
  CLC： TK323;TM621
- Published Online：05 January 2019，
  
  Published：2019
- 稿件说明：
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WANG Qian, HUI Wentao, LYU Yongtao, et al. Multivariable optimization strategy of primary frequency modulation for an ultra-supercritical 1000 MW unit[J]. Thermal Power Generation, 2019, 48(1): 24-29.
DOI：

WANG Qian, HUI Wentao, LYU Yongtao, et al. Multivariable optimization strategy of primary frequency modulation for an ultra-supercritical 1000 MW unit[J]. Thermal Power Generation, 2019, 48(1): 24-29. DOI： 10.19666/j.rlfd.201804114.

摘要

针对凝结水节流变负荷技术在燃煤机组灵活性改造时存在响应滞后10～20 s的情况

本文在某超超临界1 000 MW机组上进行凝结水节流变负荷、抽汽调节变负荷及给水分配变负荷试验

重点分析了后两种变负荷技术的安全性及有效性;并在传统凝结水节流技术的基础上

结合该机组回热系统的布置情况

提出凝结水节流与抽汽调节、给水分配变负荷技术相结合的一次调频多变量优化控制策略

再利用改进的滑压优化系统进一步提高机组节能潜力。一次调频考核试验验证了该优化策略的有效性和可行性

同时证明投入多变量优化系统及滑压优化系统后

该机组年平均节约煤耗1.5 g/(kW·h)

节能效果显著。

Abstract

The condensate throttling varying load technology has a response lag of 10～20 s during the flexible retrofit of coal-fired units

to solve this problem

the condensate throttling test

high pressure heater extraction adjustment test and feedwater distribution tests on an ultra-supercritical 1 000 MW unit were carried out.Especially

the security and effectiveness of the last two load-changing methods were analyzed in detail.Combining the conventional condensate throttling technology with the special layout of the regenerative system of this unit

a multivariable optimization strategy of primary frequency modulation including condensate throttling

extraction adjustment and feedwater distribution was proposed. Moreover

the improved sliding pressure optimization system was used to further improve the energy saving potential of the unit. Through the primary frequency modulation assessment test

the effectiveness and feasibility of the improved strategy was proved. The experiment proves that

after the multivariable optimization system and sliding pressure optimization system was put into service

the annual average coal consumption of the unit decreased by 1.5 g/(kW·h)

indicating the energy saving effect is dramatic.

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