Fast Load-changing Control Strategy for Cogeneration Units Based on Electro-Thermal Synergy and Energy Balance

WANG Wei; XU Ying; XIE Xinyan; YU Wei; HU Yong; YANG Jian; ZENG Deliang

doi:10.19805/j.cnki.jcspe.2025.240235

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Fast Load-changing Control Strategy for Cogeneration Units Based on Electro-Thermal Synergy and Energy Balance

更新时间：2026-10-10

- Fast Load-changing Control Strategy for Cogeneration Units Based on Electro-Thermal Synergy and Energy Balance
- Chinese Journal of Power Engineering Vol. 45, Issue 6, Pages: 878-886(2025)
- 作者机构：
  
  1. 华北电力大学控制与计算机工程学院,北京,102206
  2. 华电电力科学研究院有限公司,浙江,杭州,310030
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240235
  CLC：
- Online First：16 June 2025，
  
  Published：2025
- 稿件说明：
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王玮,徐颖,谢欣言,蔚伟,胡勇,杨健,曾德良. 基于电热协同与能量平衡的供热机组快速变负荷控制策略动力工程学报, 2025, 45(6): 878-886 https://doi.

org/10.19805/j.cnki.jcspe.2025.240235
王玮,徐颖,谢欣言,蔚伟,胡勇,杨健,曾德良. 基于电热协同与能量平衡的供热机组快速变负荷控制策略动力工程学报, 2025, 45(6): 878-886 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240235.

org/10.19805/j.cnki.jcspe.2025.240235 DOI：

摘要

为适应新型电力系统对供热机组自动发电控制(AGC)调节性能的需求

提出了一种基于电热协同与能量平衡的供热机组快速变负荷控制策略。首先

将供热抽汽调节作为机组发电负荷的主调节回路;进一步

将电热负荷转换信号引入汽机主控

设计了汽机侧电热能量一体化响应回路;最后

设计了锅炉侧精准能量平衡回路。以某300 MW机组为例进行了仿真验证。结果表明:所提协调控制策略可使机组初期的变负荷速率达到额定负荷的5.3%/min

整体变负荷速率达到额定负荷的2.6%/min

机组的AGC综合性能指标相较于传统协调控制策略提升2.2倍;同时

机组热负荷的偏离度小于0.15%

可有效保证供热可靠性。

Abstract

To address the requirements of the new power system for the automatic generation control (AGC) regulation performance of cogeneration units

a fast load-changing control strategy integrating electro-thermal coordination and energy balance was proposed. First

the heating extraction regulation was adopted as the main control loop of the power generating load of the unit. Then

an electro-thermal load conversion signal was introduced into the steam turbine's main control system and the integrated response circuit of electro-thermal energy on the steam turbine side was designed. Finally

a precise energy balance control loop on the boiler side was designed. A simulation verification was conducted using 300 MW unit as an example. Results show that with the proposed coordinated control strategy

the initial load-change rate is increased to 5.3% of the rated load per minute

and the overall rate is raised to 2.6% of the rated load per minute. The AGC comprehensive performance indicators of the unit have been improved by 2.2 times compared to traditional coordinated control strategy. At the same time

the heat load deviation is less than 0.15%

ensuring the reliability of heating effectively.

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references

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