摘要
燃气透平的背压是决定燃气轮机性能的重要参数之一,对燃气轮机运行效率以及安全性都具有不可忽略的影响。该文采用模块化建模方法,结合燃气轮机的控制策略,基于仿真平台建立某重型燃气轮机的动态仿真模型,研究透平背压调控过程及负荷波动过程机组的动态特性。结果表明,建立的动态模型可以较为准确地模拟重型燃气轮机的动态特性。对不同输入信号的仿真结果进行对比分析,探究透平背压的不同变化趋势对燃气轮机动态特性的影响,包括背压降低时不同控制策略下燃气轮机透平进出口温度变化对机组的影响及不同控制策略面对扰动时各参数动态响应的差异。验证了透平背压调控对燃气轮机动态响应特性和变几何性能的优化作用,包括低背压下燃气轮机具有更快的响应速度及更高的级效率,透平背压调控能够确保机组在更大的负荷范围内透平进出口温度维持在目标值附近,可保证机组高效、稳定运行。
The back pressure of a gas turbine is one of the important parameters that determine its performance,and it has an undeniable impact on the operational efficiency and safety of the gas turbine.This article adopts a modular modeling method,combined with the control strategy of a gas turbine,to establish a dynamic simulation model of a heavy-duty gas turbine based on a simulation platform.The dynamic characteristics of the unit during the process of turbine back pressure regulation and load fluctuation are studied.The results indicate that the established dynamic model can accurately simulate the dynamic characteristics of heavy-duty gas turbines.The simulation results of different input signals are compared and analyzed to explore the impact of different trends in turbine back pressure on the dynamic characteristics of gas turbines,including the impact of temperature changes at the inlet and outlet of gas turbines under different control strategies on the unit when the back pressure decreases.The differences in dynamic responses of various parameters to disturbances under different control strategies are discovered.The optimization effect of turbine back pressure regulation on the dynamic response characteristics and variable geometry performance of gas turbines has been verified,including the faster response speed and higher stage efficiency of gas turbines under low back pressure.Turbine back pressure regulation can ensure that the turbine inlet and outlet temperature remains close to the target value within a larger load range,thereby facilitating the efficient and stable operation of the unit.
作者
何怡冲
李永毅
林育超
张国强
杨泽雨
张磊
HE Yichong;LI Yongyi;LIN Yuchao;ZHANG Guoqiang;YANG Zeyu;ZHANG Lei(School of Energy,Power and Mechanical Engineering,North China Electric Power University,Changping District,Beijing 102206,China;Department of Power Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2024年第8期3155-3164,I0018,共11页
Proceedings of the CSEE
基金
国家科技重大专项(J2019-L-0009-0009)
中央高校基本科研业务费项目(2021MS078)
河北省自然科学基金面上项目(E2020502013)。
关键词
燃气轮机
模块化建模
动态模型
透平背压
响应特性
gas turbine
modular modeling
dynamic model
turbine back pressure
response characteristic
