利用一次调频扰动计算火电机组锅炉蓄热系数

doi:10.11930/j.issn.1004-9649.2017.03.071.06

中国电力 ›› 2017, Vol. 50 ›› Issue (3): 71-76.DOI: 10.11930/j.issn.1004-9649.2017.03.071.06

利用一次调频扰动计算火电机组锅炉蓄热系数

卫丹靖¹, 田亮¹, 乔弘², 刘吉臻¹

1. 华北电力大学自动化系,河北保定 071003;
2. 中国能源建设集团广东省电力设计院有限公司,广东广州 510000

收稿日期:2016-05-30 出版日期:2017-03-20 发布日期:2017-03-17
作者简介:卫丹靖（1992—）,女,陕西渭南人,硕士研究生,从事火电机组建模与控制研究。E-mail:15230236101@163.com

Calculation of Boiler Heat Storage Coefficient for Thermal Power Units Based on Primary Frequency Regulation Disturbance

WEI Danjing¹, TIAN Liang¹, QIAO Hong², LIU Jizhen¹

1. Department of Automation, North China Electric Power University, Baoding 071003, China;
2. China Energy Construction Group Guangdong Electric Power Design Institute Co., Ltd.,Guangzhou 510000, China

Received:2016-05-30 Online:2017-03-20 Published:2017-03-17

摘要/Abstract

摘要： 锅炉蓄热系数是火电机组负荷-压力被控对象中一个关键动态参数,准确估计出其大小能够为优化协调控制系统提供重要支持。依据对象负荷-压力简化非线性动态模型构建炉跟机方式的协调控制系统,从时域及频域角度分析其闭环响应特性,发现汽轮机调节门输入与燃料量输入对机前压力和发电负荷输出响应的时间及频率存在较大差异,可认为在小时间尺度范围内机前压力和发电负荷仅受汽轮机调节门输入的影响。因此可利用短周期的一次调频扰动工况下的数据辨识锅炉蓄热系数,准确度与汽轮机调节门开度扰动试验相当。通过某330 MW机组数据辨识及现场调试,证明以上方案可行。

关键词: 火电厂, 锅炉, 锅炉蓄热系数, 协调控制, 一次调频, 对象模型

Abstract: The heat storage coefficient of the boiler is a key dynamic parameter of the load-pressure controlled object for thermal power units, of which the precise estimation provides important support for optimizing the coordinated control system. According to the simplified nonlinear dynamic model of the load-pressure object, the coordinated control system in the boiler following mode is established to analyze its closed-loop response characteristics using the frequency domain and the time domain methods. The results show that there are big differences in the time and frequency responses of the throttle pressure and the generation load outputs to the governor valve opening and the fuel flow inputs. It can be considered that the throttle pressure and the generation load are only affected by the governor valve opening within a small time scale. Therefore, the data under primary frequency regulation disturbance conditions in a short cycle are used to identify the boiler heat storage coefficient, which accuracy is good as that of the governor valve opening disturbance experiment. In addition, the feasibility of the methods is proved through the data identification and the field experiments in a 330 MW unit.

Key words: thermal power plant, boiler, boiler heat storage coefficient, coordinated control, primary frequency regulation, object model

中图分类号:

TM621
TP273

卫丹靖, 田亮, 乔弘, 刘吉臻. 利用一次调频扰动计算火电机组锅炉蓄热系数[J]. 中国电力, 2017, 50(3): 71-76.

WEI Danjing, TIAN Liang, QIAO Hong, LIU Jizhen. Calculation of Boiler Heat Storage Coefficient for Thermal Power Units Based on Primary Frequency Regulation Disturbance[J]. Electric Power, 2017, 50(3): 71-76.

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利用一次调频扰动计算火电机组锅炉蓄热系数

Calculation of Boiler Heat Storage Coefficient for Thermal Power Units Based on Primary Frequency Regulation Disturbance

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