Abstract
Dynamic simulation of turbomachinery by Hardware in the Loop (HIL) real-time systems has become an essential practice, due to the high cost of real equipment testing and the need to verify the control and diagnostic systems’ reaction to emergency situations. The authors developed a full model of a power generation Gas Turbine Plant, including liquid and gaseous auxiliaries, and the electrical generator and starter motor, integrated in a MATLAB®/Simulink® simulation suite: TGSim Plus™. This allows assembling models of various gas turbine (GT) architectures by customised Simulink® library blocks and simulating steady state and transient conditions, such as complete start-up and shutdown operations as well as emergency, contingent operations and artificially injected fault scenarios. The model solver runs real-time steps at milliseconds scale. The paper describes the main modelling characteristics and typical results of steady state and transient simulations of a heavy-duty gas turbine under development by Doosan Heavy Industries and Construction (Changwon, South Korea). Comparison with benchmark design simulations obtained by a reference non real-time software shows a good match between the two environments, duly taking into account some differences in the GT models setting affecting parts of the sequence. The paper discusses also the bleed streams warm-up influence on GT performance and the start-up states trajectories dependency on control logic and on the starter helper motor torque envelope.
Highlights
Dynamic simulation by Hardware in the Loop (HIL) real-time systems has become a common practice in several industrial fields, in particular in the turbomachinery sector, due to the high cost of real equipment testing and the need to verify the control and diagnostic systems reaction to emergency situations or fault conditions that could damage the machinery
HIL testing consists in interfacing the real prototype or final product control system with a computing platform, which runs a software simulating in real time the dynamic behaviour of the controlled machine or process as if it were the real one in full feedback behaviour, as represented in
PlusTM are shown in Figure 6 comparing the reference data obtained by a design tool [3] and the output provided by TGSim PlusTM
Summary
Dynamic simulation by Hardware in the Loop (HIL) real-time systems has become a common practice in several industrial fields, in particular in the turbomachinery sector, due to the high cost of real equipment testing and the need to verify the control and diagnostic systems reaction to emergency situations or fault conditions that could damage the machinery. Gas Turbine Control System (GTCS): real (online model) or simulated version I/O interface platform characteristics, while offlinesimulations, simulations,run run on on stand-alone stand-alone interface and and HILHIL platform characteristics, while forforoffline workstations, it can be either set at fixed or variable time step, according to the various options workstations, it can be either set at fixed or variable time step, according to the various options available in the Simulink® environment This allows, during the model development phase, to verify and ensure the limits of the fixed time step vis-à-vis the accuracy obtained.
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