Low-load operation characteristic analysis and comprehensive optimization of condensate system of a 1000MW unit

LIN Lin; LIU Feng; WANG Hongwu; ZHOU Gang; WANG Yong

doi:10.19666/j.rlfd.202004101

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Low-load operation characteristic analysis and comprehensive optimization of condensate system of a 1000MW unit

更新时间：2025-09-28

- Low-load operation characteristic analysis and comprehensive optimization of condensate system of a 1000MW unit
- Thermal Power Generation Vol. 50, Issue 3, Pages: 152-157(2021)
- 作者机构：
  
  1. 西安西热节能技术有限公司
  2. 广东粤电靖海发电有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202004101
  CLC： TK01
- Published Online：22 February 2021，
  
  Published：2021
- 稿件说明：
移动端阅览
LIN Lin, LIU Feng, WANG Hongwu, et al. Low-load operation characteristic analysis and comprehensive optimization of condensate system of a 1000MW unit[J]. Thermal power generation, 2021, 50(3): 152-157.
DOI：

LIN Lin, LIU Feng, WANG Hongwu, et al. Low-load operation characteristic analysis and comprehensive optimization of condensate system of a 1000MW unit[J]. Thermal power generation, 2021, 50(3): 152-157. DOI： 10.19666/j.rlfd.202004101.

摘要

本文以某超超临界1000MW机组为例

分析了该机组凝结水系统能耗偏高的主要原因

提出了凝结水系统综合优化改造方法

减小了机组凝结水系统阻力

降低了凝结水泵的运行压力。以定性分析结合定量试验的方法

研究了中低负荷段凝结水系统的运行特性

并采用试验的方法进行了优化

探索了凝结水泵最低运行频率。各低负荷工况优化结果表明:在600MW工况下

凝结水系统功耗下降了78.5kW;在500MW工况下

凝结水系统功耗下降了139.6kW;在400MW工况下

凝结水系统功耗下降了187.5kW

折合机组年均厂用电率下降了0.03百分点。

Abstract

By taking an ultra-supercritical 1000MW unit as the object

the main reason for high energy consumption of the condensate system of the unit was analyzed

and the comprehensive optimization retrofit method of the condensate system was put forward

which reduced the resistance of the condensate system and the operating pressure of the condensate pump. The operation characteristics of the condensate system in the middle and low load section were studied by the method of qualitative analysis and quantitative test

and optimized by the experimental method

and the lowest operating frequency of the condensate pump was explored. The optimization results of each low load condition showed that

the power consumption of the condensate system reduced by 78.5 kW at 600MW

and by 139.6 kW at 500 MW. At 400 MW

the power consumption of the condensate system reduced by 187.5 kW

the converted average annual power consumption rate reduced by 0.03 percentage points.

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