供热机组汽轮机低压缸排汽流量软测量

doi:10.16182/j.issn1004731x.joss.201805023

系统仿真学报 ›› 2018, Vol. 30 ›› Issue (5): 1803-1811.doi: 10.16182/j.issn1004731x.joss.201805023

供热机组汽轮机低压缸排汽流量软测量

田亮, 王桐

华北电力大学控制与计算机工程学院河北保定 071000

收稿日期:2016-05-26 修回日期:2016-08-01 出版日期:2018-05-08 发布日期:2019-01-03
作者简介:田亮(1976-),男,内蒙古磴口,博士,副教授,研究方向为大型火电机组建模及软测量;王桐(1991-),女,河北廊坊,硕士生,研究方向为火电机组数据统计及应用。
基金资助:
国家973计划(2012CB215200)

Soft-sensor Method of Low Pressure Cylinder Exhaust Flow of Heating Units

Tian Liang, Wang Tong

School of Control and Computer Engineering, North China Electric Power University, Baoding 071000, China

Received:2016-05-26 Revised:2016-08-01 Online:2018-05-08 Published:2019-01-03

摘要/Abstract

摘要： 电网要求供热机组在供热季内尽量降低发电负荷下限以提高风电负荷消纳能力,汽轮机低压缸排汽流量是决定发电负荷下限的主要参数。通过分析汽轮机侧工质流动质量-能量平衡关系,选择凝结水流量、凝结水焓升、6号低加焓降作为辅助变量,建立了低压缸排汽流量静态软测量模型,并进一步选择了汽轮机7、8段抽汽压力、温度,利用Flügel公式计算出汽轮机末级蒸汽流量引入动态补偿。通过对比分析一330 MW供热机组的静态运行数据,以及汽轮机低压缸进汽流量调节蝶阀和热网抽汽调节蝶阀开度扰动实验数据,验证了准确度及动态响应速度能够满足现场要求。

关键词: 供热机组, 低压缸排汽流量, 软测量, 数据拟合

Abstract: In order to improve the capacity of absorbing the wind power, power grid requests heating units to reduce the power load limit as far as possible. Turbine exhaust steam flow is a main parameter which determines power load limit. By analysing the balance of the mass-energy on vapor flow, and choosing the condensate flow and enthalpy rise of condensate and enthalpy drop of number 6 low pressure heater as auxiliary variables, soft-sensor method of low pressure cylinder exhaust flow is established. Furthermore, number 7 and number 8 extraction pressure and temperature are chosen simultaneously and dynamic low pressure cylinder exhaust flow is calculated by FlÜGEL formula as dynamic compensation. The comparison between the static operating data of a 330 MW heating unit, the disturbance experimental data of low-pressure valve and extraction valve show that the accuracy and the dynamic respond speed of the soft-sensor signal satisfy the in-field requirements.

Key words: heating unit, low pressure cylinder exhaust flow, soft-sensor method, data fitting

中图分类号:

TK273

田亮, 王桐. 供热机组汽轮机低压缸排汽流量软测量[J]. 系统仿真学报, 2018, 30(5): 1803-1811.

Tian Liang, Wang Tong. Soft-sensor Method of Low Pressure Cylinder Exhaust Flow of Heating Units[J]. Journal of System Simulation, 2018, 30(5): 1803-1811.

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供热机组汽轮机低压缸排汽流量软测量

Soft-sensor Method of Low Pressure Cylinder Exhaust Flow of Heating Units

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