单抽供热机组负荷控制系统的解耦设计及动态响应特性研究

doi:10.3969/j.issn.1674-1951.2021.03.007

华电技术 ›› 2021, Vol. 43 ›› Issue (3): 40-47.doi: 10.3969/j.issn.1674-1951.2021.03.007

单抽供热机组负荷控制系统的解耦设计及动态响应特性研究

秦海山¹, 栾丛超², 侯晓宁¹, 种道彤²^,^*()

1.华电郑州机械设计研究院有限公司,郑州 450046
2.陕西省能源高效清洁转换工程技术研究中心,西安 710049

收稿日期:2020-11-25 修回日期:2021-03-02 出版日期:2021-03-25 发布日期:2021-03-25
通讯作者: 种道彤
作者简介:秦海山（1980—），男，河南郑州人，高级工程师，从事火力发电厂设计工作（E-mail：qinhs@chec.com.cn）。
栾丛超（1993—），男（满族），辽宁丹东人，硕士，从事热力系统仿真与运行优化等方面的研究（E-mail：luancongchao@foxmail.com）。
侯晓宁（1989—），女，河北邢台人，工程师，硕士，从事火力发电厂设计工作（E-mail：houxn@chec.com.cn）。
基金资助:
国家重点研发计划项目(2017YFB0602101);陕西省自然科学基金项目(2019ZY-CXPT-03)

Decoupling design of the load control system in a single-extraction heating unit and its dynamic response characteristics

QIN Haishan¹, LUAN Congchao², HOU Xiaoning¹, CHONG Daotong²^,^*()

1. Huadian Zhengzhou Mechanical Design Institute Company Limited,Zhengzhou 450046, China
2. Shaanxi Energy Efficient Clean Conversion Engineering Technology Research Center, Xi'an 710049,China

Received:2020-11-25 Revised:2021-03-02 Online:2021-03-25 Published:2021-03-25
Contact: CHONG Daotong

摘要/Abstract

摘要：

供热机组存在的耦合现象导致热、电负荷独立调节困难,难以满足电网自动发电控制系统的要求。采用增量方程的方法将供热机组数学模型线性化,通过计算得到供热机组各输入、输出之间的静态相对增益,从而进行变量配对,在此基础上应用多变量解耦理论对控制系统进行解耦设计,分析解耦优化前后控制系统作用下的热、电负荷调节动态特性。结果表明,优化后的控制系统能够改善热、电负荷的调节品质,优化供热机组的调节特性。

关键词: 供热机组, 热电解耦, 相对增益, 控制系统, 多变量解耦, 变负荷

Abstract:

The coupling of heat load and electric load in heating units makes it difficult to adjust the load independently. The adjustment cannot meet the requirements of Automatic Generation Control（AGC）. Taking increments equation to linearized the mathematical model of the heating unit, the static relative gain between each input and output of the heating unit is calculated. Then, the variables are paired. On this basis, the control system is decoupled with the help of multivariable decoupling theory. The dynamic characteristics of thermal and electric load regulation made by the control system before and after the decoupling are analysed. The results show that the optimized control system can improve the regulation of heat and electric load, and optimize the regulation characteristics of heating units.

Key words: heating unit, decoupling of thermal and electric load, relative gain, control system, multivariable decoupling, variable load, dynamic response

中图分类号:

TK323

秦海山, 栾丛超, 侯晓宁, 种道彤. 单抽供热机组负荷控制系统的解耦设计及动态响应特性研究[J]. 华电技术, 2021, 43(3): 40-47.

QIN Haishan, LUAN Congchao, HOU Xiaoning, CHONG Daotong. Decoupling design of the load control system in a single-extraction heating unit and its dynamic response characteristics[J]. Huadian Technology, 2021, 43(3): 40-47.

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静态相对增益	数值
λ₁₁	0.981 6
λ₁₂	0.018 4
λ₁₃	0
λ₂₁	0.015 4
λ₂₂	0.981 7
λ₂₃	0.002 9
λ₃₁	-0.002 9
λ₃₂	0
λ₃₃	1.002 9

单抽供热机组负荷控制系统的解耦设计及动态响应特性研究

Decoupling design of the load control system in a single-extraction heating unit and its dynamic response characteristics

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