Realization of main automatic control in load rejection test for turbine power plants

WANG Zheng; LI Wei; LI Xiaolin; SHEN Qiankun; ZHAO Weigang

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Realization of main automatic control in load rejection test for turbine power plants

Thermal Power Generation Vol. 43, Issue 1, Pages: 106-109(2014)

更新时间：2025-09-28

- Realization of main automatic control in load rejection test for turbine power plants
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 华能白山煤矸石发电有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM311
- Published：2014
- 稿件说明：
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WANG Zheng, LI Wei, LI Xiaolin, et al. Realization of main automatic control in load rejection test for turbine power plants[J]. Thermal Power Generation, 2014, 43(1): 106-109.
DOI：

WANG Zheng, LI Wei, LI Xiaolin, et al. Realization of main automatic control in load rejection test for turbine power plants[J]. Thermal Power Generation, 2014, 43(1): 106-109. DOI：

摘要

机组甩负荷试验是大型汽轮发电机组上网运行的必备条件。在甩负荷过程中

由于机组参数变化幅度较大

因此控制系统在手动方式下难以控制各参数。对此

根据机组甩负荷过程特点

对汽轮机高/低压旁路控制系统、锅炉主控系统的相关控制回路等进行了设计和优化

并提出了新的给水控制策略。机组50%、75%甩负荷试验结果表明

控制系统在自动方式下

机组转速控制正常

锅炉燃烧稳定

各主要参数变化平稳

机组具备重新快速并网的能力

提高了控制系统在机组甩负荷工况下的控制品质

从而保证了机组和电网运行安全性。

Abstract

Load rejection test is requisite for large steam turbine power plants running on grid. During the load rejection

due to the large variation of unit parameters

it becomes difficult to control each parameter under manual mode.Thus

according to the characteristics of load rejection

design and optimization for relative control loops of several main systems was conducted

such as the turbine HP/LP bypass system and boiler master control system.Moreover

a new control method for feed-water control was put forward.The 50% and 75%load rejection tests indicate that

with the control system under the automatic control mode

the turbine speed is under control

the combustion in boiler is stable

each main parameter changes smoothly

and the unit can connect to the grid again quickly.Therefore

the control quality is enhanced

which ensures the operation safety of the unit and grid.

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