基于差压电流比混合模型的磨煤机变加载策略优化

doi:10.3969/j.issn.2097-0706.2024.12.002

综合智慧能源 ›› 2024, Vol. 46 ›› Issue (12): 10-16.doi: 10.3969/j.issn.2097-0706.2024.12.002

基于差压电流比混合模型的磨煤机变加载策略优化

陈然璟(), 陈祎璠(), 曹越^*(), 司风琪()

东南大学能源转换及过程测控教育部重点实验室，南京 210096

收稿日期:2023-05-06 修回日期:2023-05-30 出版日期:2023-06-02
通讯作者: *曹越（1989），男，副教授，硕士生导师，博士，从事新型动力循环、热力系统性能优化和智能控制理论方面的研究，ycao@seu.edu.cn
作者简介:陈然璟（1999），男，硕士生，从事热力学性能优化方面的研究，marchon@seu.edu.cn；
陈祎璠（1998），男，硕士生，从事热力学性能优化方面的研究，220204875@seu.edu.cn；
司风琪（1973），男，教授，博士生导师，博士，从事智慧电厂及电力大数据、热工自动控制优化方面的研究，fqsi@seu.edu.cn。
基金资助:
国家自然科学基金项目(52206006);江苏省基础研究计划青年基金项目(BK20210240)

Coal mill variable loading force optimized strategy based on the fused model of the ratio of pressure-drop to current

CHEN Ranjing(), CHEN Yifan(), CAO Yue^*(), SI Fengqi()

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education，Southeast University，Nanjing 210096，China

Received:2023-05-06 Revised:2023-05-30 Published:2023-06-02
Supported by:
National Natural Science Foundation of China(52206006);Natural Science Foundation of Jiangsu Province(BK20210240)

摘要/Abstract

摘要：

在“双碳”背景下对燃煤机组低负荷运行提出了新的挑战，磨煤机作为制粉系统关键设备，急需对磨煤机控制策略进行优化以提高其运行效率和安全性。使用某电厂磨煤机运行数据，结合磨煤机运行时出力、进出口差压和电流的机理关系，使用回归法和相关性分析等数据挖掘手段分析各运行参数间的关系。提出利用差压电流比评价磨煤机运行情况，该参数与磨煤机出力相关性较低，适合作为变出力判断依据。运行数据表明，在基本运行线附近磨煤机差压电流比适中，过大或过小均不是最佳运行区间。基于差压电流比的分布情况，得到了具体变加载曲线，提出的变加载策略具有抑制振动、提高运行效率的效果。对同机组其他磨煤机基于差压电流比的变加载策略具有良好通用性。

关键词: 磨煤机, 加载力, 运行优化, 机理融合, 数据挖掘

Abstract:

The proposal of the "dual carbon" goals posed a challenge to coal-fired generating units under low-load operation. As the key equipment of a coal pulverizing system， a coal mill is in urgent need of optimizing its control strategy so as to enhance the efficiency and safety. Base on real operation data of a coal mill， data mining tools such as regression method and correlation analysis are adopted to uncover the relationships between its operating parameters including the outputs and the ratio of pressure-drop to current. The ratio of pressure-drop to current， which is weakly related to the mill capacity， is taken to evaluate the operating condition， making the parameter a proper criterion for the performance of the mill under variable load operation. Operation data show that moderate ratios of pressure-drop to current that near the operation baseline provide an optimal value range for the parameter. Considering the distribution of the ratio of pressure-drop to current， a specific loading force strategy is obtained， which can supress the vibration and enhance the efficiency of the coal mill. The strategy made based on the ratio of pressure-drop to current is applicable to mills of the same type.

Key words: coal mill, loading force, runtime optimization, mechanism fusion, data mining

中图分类号:

TK01：TM621

陈然璟, 陈祎璠, 曹越, 司风琪. 基于差压电流比混合模型的磨煤机变加载策略优化[J]. 综合智慧能源, 2024, 46(12): 10-16.

CHEN Ranjing, CHEN Yifan, CAO Yue, SI Fengqi. Coal mill variable loading force optimized strategy based on the fused model of the ratio of pressure-drop to current[J]. Integrated Intelligent Energy, 2024, 46(12): 10-16.

图/表 12

图1

图2

表1

磨煤机运行工况拟合结果

参数	拟合值	误差	R²
$k$	1.090 0	0.006 740 0	0.063 8
$b$	0.053 7	0.000 137 4	0.063 8

表1

图3

图4

图5

图6

图7

图8

表2

图9

图10

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出入口差压区间/kPa	磨煤机振动/（mm·s^-1）	加载力偏置/%
>6.0	/	+15
>5.5	/	+10
>5.0	/	0
<4.5	>1	-10
<4.0	>2	-20
<3.5	>3	-25

基于差压电流比混合模型的磨煤机变加载策略优化

Coal mill variable loading force optimized strategy based on the fused model of the ratio of pressure-drop to current

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