Melhoria do simulador do sistema turbogerador
Abstract
The turbogenerator system, comprising a crucial turbine and generator
component in power generation systems, along with an initial boiler, has seen
advancements in technology over the years, leading to new possibilities in system
control. However, before implementing these controls in the final system, validation
becomes necessary. To achieve this, a turbogenerator system simulator was
developed using a Programmable Logic Controller (PLC) and a Human-Machine
Interface (HMI). Nevertheless, the current simulator faces challenges in accurately
reproducing real system behaviors and maintaining computational efficiency for
simulations. Such limitations may result in imprecise and inadequate outcomes,
hindering the analysis of various turbogenerator operational scenarios, and prolonging
Factory Acceptance Testing (FAT) for electrical panels storing the system's control,
encompassing PLC, HMI, Speed Regulator, Protection Relays, and other components
based on complexity. This work aims to enhance the simulator, addressing these
limitations, to reduce engineering time for validating new controls and improve FAT
efficiency. Assessing the necessary improvements for the simulator, some limitations
in analog inputs and outputs hindered the implementation of all enhancements.
Therefore, focus was placed on impactful improvements, including two controls: Digital
Synchronizer and Load Control (DSLC) by Woodward for load control and
Woodward's 505 model for power control. The simulator's PLC is WEG PLC 300, and
the WEG HMI was utilized, with improvements made in ladder language to match the
existing code. Testing DSLC control necessitated revising the previous code due to
deviations from expectations. Power control with the speed regulator showed
oscillation of 1.24% above and 0.72% below the desired value, with an error of
approximately 0.98% during testing. Moreover, load control with DSLC revealed that
higher simulated loads increased oscillation rate and control error. In conclusion, the
implemented simulator improvements signify significant strides in understanding and
optimizing the turbogenerator system, resulting in more efficient FAT work and
reduced engineering time investment in this process.
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