Position Control Method And Experiment Research Of Adjustable Inlet Guide Vane For Heavy-duty Gas Turbine's Compressor

The environmental index is more and more strict recently.Considering this problem,clean power generation technology has been the important trend.Gas-fired power generation,as one of clean power generation technology,produce power by using gas turbine as motive power machine.During the runtime of the gas turbine,particularly in the start-stop condition,gas turbine is liable to occurring surge owing to the mismatches of rotor speed and air inflow or air inlet direction;and during the combined cycle condition,if the air inflow or air inlet direction will changing quickly and precisely according to the size of the load and discharge temperature,then the combined cycle will gain higher efficiency.Gas turbine's air inflow and air inlet direction is reaulated by compressor's inlet guide vane(hereinafter referred to as IGV),traditional IGV position control use PID algorithm,when cumulative control deviation is more than 20%,protection system get involved and generation unit trip.At the background,based on the position control system of gas turbine compressor 's IGV and its working principle,revolving around the problem of designing a control strategy which is suitable for this machinery and its results very well,this papper carried out the study of theory and experiment.Firstly,studied the major part of the position control system of gas turbine compressor's IGV and its operating principle,established mathematical model of the control system of IGV basing on theory of mechanism and hydrodynamics;established physical simulation model of the control system of IGV basing on Sim Hydraulics toolbox on the MATLAB.Gain the transfer function of the control system using the system identification method.Analyzed the bode graph of the transfer function,designed the control strategy according to the basic konwledge contorller design,direct at the pure time delay in the studied system,Smith predictor is added,using MATLAB to attain modeling experiment.It turned out that,with the optimized control strategy,the system gained a good control effectiveness and validated the feasibility of the optimized control strategy.Based on theory study of the control system and its optimized control strategy design,designed and established the position control experiment table of hydraulic servo system.Authored data acquisition and instrument control software and conducted an experiment according to the typical working conditions.Analyzing the experimental data can validate the feasibility of the optimized control strategy.