Improved boiler-turbine coordinated control of 1000 MW power units by introducing condensate throttling

被引：34

作者：

Wang, Wei ^{[1
]}

Li, Lu ^{[1
]}

Long, Dongteng ^{[1
]}

Liu, Jizhen ^{[1
]}

Zeng, Deliang ^{[1
]}

Cui, Can ^{[1
]}

机构：

[1] North China Elect Power Univ, Sch Control & Comp Engn, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China

来源：

JOURNAL OF PROCESS CONTROL | 2017年 / 50卷

基金：

中国国家自然科学基金;

关键词：

Load-following capability; Coordinated control; Condensate throttling; Decoupling controller; DYNAMIC-MODEL; TIME-DELAY; SYSTEMS; DESIGN; INVERSION; PLANT;

D O I：

10.1016/j.jprocont.2016.12.002

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Improving the operating flexibility of coal-fired units has become more and more important since an increasing number of fiuctuant renewable energy connected to the power grid would make the power system easily unstable. However, it is difficult for the 1000 MW power units to improve their load change capability because the large delay of their once-through boilers. In this paper, the condensate throttling and coordinated control are combined to accelerate the load response, and a 4-inputs 3-outputs control model is firstly set up. Then a dual controller is designed to realize the combination control of fuel flow and condensate water flow on turbine load; also, the dual controller can recover the condensate water flow and deaerator level to their former values. Furthermore, the feedforward control based on stable inversion is developed to advance the response of fuel regulation, and the main steam pressure control and separator outlet enthalpy control are decoupled for convenient control. Finally, simulation tests and analyses on a 1000 MW unit are carried out to prove the effectiveness of our strategy. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：11 / 18

页数：8

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