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    An Adaptive Passivity Based Control of Grid Connected VSC with Integral Action
    (Institute of Electrical and Electronics Engineers Inc., 2019) Uslu, Akin; Ozbek, Necdet Sinan; Aydemir, Timur
    In this paper, we propose improved passivity based control (PBC) strategy for grid connected voltage source converter (VSC). In order to provide global asymptotical stability of the closed loop control system in the sense of Lyapunov approach, VSC is modelled within port-Hamiltonian framework. Classical PBC techniques are insufficient to achieve zero steady state tracking error. To eliminate this errors caused by constant disturbances, integrator is inserted into to the proposed PBC. Furthermore, designed adaptive observer allows sensorless operation for the proposed method. Simulation results are presented to validate the proposed controller. © 2019 IEEE.
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    Öğe
    Event-Based Control Strategies for HVAC Systems
    (Institute of Electrical and Electronics Engineers Inc., 2019) Ozbek, Necdet Sinan; Uslu, Akin
    Recent developments in hardware and software enable us to develop resource-aware and computationally efficient optimal control strategies, which are important for efficiently usage of energy resources. Event-based control is one of the energy-efficient methods especially for distributed and complex control systems. The prominent feature of the event-based control is the idea of removing unnecessary updating of control input when the system state stays in desired bounds. This paper focuses on the central idea of event-triggered and time-triggered control strategies for Heating, Ventilating, and Air Conditioning (HVAC) applications. Furthermore, recent techniques on HVAC are classified concerning some prominent features. Thus, the present research provides an in-depth guide for designers who investigate the HVAC control application. © 2019 IEEE.