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This paper presents a high-gain boost converter for an fuel cell (FC) applications. A model-based control structure based-on flatness principle for a distributed DC generation is studied. As the derived dynamic model of the converter model is nonlinear, advanced control techniques using differential flatness are applied. Utilizing the flatness property, we propose simple solutions to the system performance...
The aim of this paper is to estimate the capacitor's voltages by tacking the hybrid behavior of the multicellular converter into account. A nonlinear finite time observer is given in order to solve this problem. The stability and properties of the proposed homogeneous finite time observer are studied using Lyapunov theory. Our approach enables the stabilization of the observation errors in spite of...
This paper presents a three-level three-phase diode clamped inverter that uses an auxiliary circuit to equalize its DC-bus capacitor voltages. The proposed converter is used in an Active Power Filter (APF) and a controller is designed for this new APF. A state space model of this filter is obtained first. Three single input single output (SISO) robust controllers are designed to compensate the load...
This paper presents the emulation of an isolated wind energy conversion system, which is composed by a doubly-fed induction generator, a back-to-back converter connected to its rotor, a LC filter to minimize the harmonic pollution in the generated voltage and an isolated three-phase load. In first instance, the test bench is described and its operational capabilities are introduced. Afterwards, the...
Power-synchronization control is particularly applicable to voltage-source converters based high-voltage direct-current (HVDC) transmission connected to weak ac systems. In this paper, the multivariable feedback design aspect of the power-synchronization control is investigated by two design approaches: internal model control (IMC) and Hinfin control. The paper shows that both of the methods can meet...
This paper presents a state model of a three-phase, four-wire five-level diode-clamped converter (DCC) employed in a Static Compensator (StatCom) for medium power applications. Two auxiliary circuits are used to equalize the voltages across the DC-bus capacitors. A detailed controller design procedure is presented. The proposed controller is composed of a DC-link voltage sub-controller to keep the...
This paper proposes a novel control strategy for IPMSM drive system. The proposed single-phase to three-phase power converter does not require a reactor and an electrolytic capacitor at dc-link, and obtains unity input power factor. The proposed control method improves the source current waveform at any load conditions by using the feedback control. The proposed control system is constructed by using...
This paper proposes a novel interphase power controller (IPC) based on multilevel cascaded H-bridge converters, which are fed by diode bridge sources. In the proposed structure the fundamental modulation scheme is applied to decrease the switching loss in the converters. Furthermore, in this paper the mathematical model of IPC is derived. Based on this model a new method with the aid of MATLAB Simulink...
In this paper is studied the single-phase two-cell multilevel cascade H-bridge power converter connected to the grid, acting as a synchronous rectifier. The power exchange process between the cells of the converter and the grid is analyzed. Based on this analysis and on the power converter model the stages of the controller design process are shown. A new controller for the cascade power converter...
Conventional PWM voltage mode or current mode control techniques are commonly used in practice for controlling switched-capacitor converters. However, such control methods are only useful for applications involving small operating regions. This paper discusses the application of nonlinear control in the form of sliding mode control on switched-capacitor converters. The result is an enlarged operating...
This paper proposes an input-paralleled output-paralleled half-bridge converter based on single half-bridge converter, which is very suitable for the low output voltage and large output current application. All modules share a common capacitor-leg, that can reduce the number of main circuitpsilas capacitors and make topology simple. The traits and rules of combination converter are introduced and...
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