Delay stability analysis of heavy-duty gas turbine control loop
In industrial production processes,time delays can have adverse effects on the performance of control systems,and may even lead to system instability.This article investigates the stability issues of time-delay in the load/speed control loop of a heavy-duty gas turbine from the perspective of switching systems.The model of GE MS109FA 275 MW heavy-duty gas turbine under 100%load is taken as the research object.The load/speed control loop with time-varying delay is transformed into a class of switching system by augmenting the state variable and selecting the change of time delay as the switching signal.By using the norm correlation lemma,a necessary and sufficient condition to ensure the stability of the load/speed control loop with time-varying delay is derived and the stability verification algorithm is given.The hardware-in-the-loop simulation is carried out based on the domestic heavy-duty gas turbine NuCON control system.The results of this study can provide theoretical references for the design and parameter adjustment of heavy-duty gas turbine control system.
heavy-duty gas turbinetime-delaystabilityhardware-in-the-loop
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