Primary frequency control ability of thermal power units with large capacity:simulation and experiment

DING Ning; LIAO Jinlong; CHEN Bo; YIN Feng; YU Zitao; SHENG Deren

doi:10.19666/j.rlfd.201709218

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Primary frequency control ability of thermal power units with large capacity:simulation and experiment

更新时间：2025-09-28

- Primary frequency control ability of thermal power units with large capacity:simulation and experiment
- Thermal Power Generation Vol. 47, Issue 6, Pages: 85-90(2018)
- 作者机构：
  
  1. 国网浙江省电力公司电力科学研究院
  2. 浙江大学热工与动力系统研究所
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201709218
  CLC： TK261
- Published Online：06 June 2018，
  
  Published：2018
- 稿件说明：
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DING Ning, LIAO Jinlong, CHEN Bo, et al. Primary frequency control ability of thermal power units with large capacity:simulation and experiment[J]. Thermal power generation, 2018, 47(6): 85-90.
DOI：

DING Ning, LIAO Jinlong, CHEN Bo, et al. Primary frequency control ability of thermal power units with large capacity:simulation and experiment[J]. Thermal power generation, 2018, 47(6): 85-90. DOI： 10.19666/j.rlfd.201709218.

摘要

为研究大功率火电机组的一次调频能力

建立了数字式电液控制系统(DEH)和协调控制系统(CCS)的耦合模型

分别仿真分析了DEH和CCS单独作用和协同作用的一次调频动态过程

同时针对低负荷滑压运行机组调频能力不足问题介绍了几种优化运行方式

并通过某百万机组的一次调频试验对提升滑压设定压力、给水小旁路以及混合调频方式进行了分析。结果表明:DEH和CCS协同一次调频效果最佳;通过增加主蒸汽调节阀节流提升滑压设定压力

是提升机组一次调频能力最直接有效的方法;给水小旁路单独作用初始响应较慢

在高负荷段调频特性较好

可作为主蒸汽调节阀调频的有效补充

其调频效果与主蒸汽调节阀节流效果类似。

Abstract

Researching the primary frequency control ability of large-capacity thermal power units is the main purpose of this article. The coupling model of digital electro-hydraulic(DEH) control system and coordinated control system(CCS) was established to analyze the dynamic process of primary frequency modulation.Moreover

several operation modes were introduced to improve the lack of primary frequency control ability on sliding pressure operation. Furthermore

through the primary frequency control experiment in a 1 000 MW unit

the sliding pressure enhancement

small feed water bypass and mixed frequency modulation were tested. The results show that

using the DEH and CCS together to carry out the primary frequency modulation has the best modulation effect. Increasing the sliding pressure by rising the main steam control valve throttling is the most direct and effective method for improving the unit's primary frequency control ability. The initial response is slow for small feed water bypass and the modulation characteristics are better at high loads. It can be regarded as the effective complement to adjust the frequency for main steam regulating valve. The regulating effect is similar with that by increasing the main steam control value throttling.

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