汽轮机主汽阀活动试验建模分析与控制优化  

Modeling of Steam Turbine's Governing System During Main Steam Valve Activity Test and Control Optimization

作　　者：盛锴 彭双剑 寻新 王伯春 傅强 

机构地区：[1]国网湖南省电力公司电力科学研究院,湖南长沙410007

出　　处：《系统仿真学报》2017年第10期2542-2548,2555,共8页Journal of System Simulation

摘　　要：针对某300 MW机组汽轮机主汽阀活动试验负荷波动剧烈的问题,建立了主汽阀活动试验时的汽轮机调节系统模型,该模型由包含主汽阀活动试验逻辑的电液调节系统模型、调节汽阀模型和考虑调节汽阀流量特性的汽轮机模型组成。依据模型分析了主汽阀活动试验时负荷剧烈波动的原因,指出引起负荷波动的主要原因是控制方式、DEH(Digital Electric Hydraulic Control System)设置、机组特性的不匹配,通过仿真试验研究了解决该问题的控制优化方法,基于此方法指导实际机组的主汽阀活动试验。试验结果表明,经控制优化后主汽阀活动试验引起的负荷波动问题得到显著改善。A Model of 300 MW thermal power unit＇s governing system of steam turbine is established to analyze its load fluctuation during main steam valve activity test. The model contains three sub-models; they are the model of turbine＇s governor during main steam valve activity test, the model of electric-hydraulic servo actuator, and the model of turbine considering governing valve＇s discharge characteristic. The analyses on these models indicate that mismatch among control model, configuration of DEH （Digital Electric Hydraulic Control System） and characteristic of the unit is the cause of load fluctuation. Through simulation, the method for load fluctuation suppression was determined. Result of actual main steam valve activity test based on the method shows that load fluctuation is obviously suppressed after control optimization.

关 键 词：主汽阀活动试验 负荷波动 汽轮机调节系统 控制优化 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]