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In modern distributed energy systems (DES), there is a shift in focus from conventional centralized approach to more advanced distributed architecture. Modeling and analysis of these complex systems is more challenging, as multiple energy sources are connected with different loads through power electronics converters. Due to vastly different dynamic characteristics of these converters, it is necessary...
This paper presents a high efficiency synchronous dc-dc boost converter. The Silicon-Carbide (SiC) MOSFET belongs to the family of wide-bandgap devices and has the inherit property of lower switching and conduction losses as compared to the silicon counter part. The employement of SiC MOSFETs enables the operation of converter at higher switching frequencies, significantly reducing the inductive and...
This paper presents an adaptive control strategy for voltage regulation of three phase inverter in the standalone application. A direct type adaptive fuzzy logic controller (FLC) is employed which reduces the computational cost and guarantees stable load voltage during both steady state and load disturbance. To validate the effectiveness of the proposed control strategy, the output voltage and power...
This paper investigates the dynamic stability of a droop-controlled multi-generator system in the more electric aircraft (MEA). Based on the developed state-space model of the potential dc electrical power system (EPS) architecture, the stability boundaries of EPS operation depending on parameter variations including component parameters and operating conditions are investigated. The effect of multiple...
The Z-source dc-dc converter is a boost-type converter with high voltage gain than conventional boost converter. However, like boost converter, the Z-source dc-dc converter is also a non-minimum phase system, it transfers energy to load indirectly via the Z-network inductors. This paper presents the hysteresis modulation-based control for Z-source converter. Using differential geometry it is proved...
This paper discusses the measurement of frequency response functions at the input and output terminals of a prototype dc-dc buck converter. The frequency domain identification procedure is applied to the measured frequency response functions. The set of these transfer functions is used for black-box modeling of dc-dc converter. Distributed power systems are comprised of numerous such converters in...
The key design objective for switched mode power supplies is to achieve stability. The uncompensated system is affected by disturbances appearing at the input voltage as well as in the load current. To mitigate the effect of these disturbances some sort of control scheme is necessary to be added to the system for stable operation and robustness of the system. The introduction of control scheme into...
This paper deals with the modeling and small-signal stability analysis of a dc-distribution electrical power system (EPS) sourced by a permanent magnet synchronous generator (PMSG). The topology employed here is one of the main candidates for future more electric aircraft (MEA). A detailed mathematical model is developed and comprehensive EPS modal analysis is performed. Eigenvalue sensitivity and...
This paper deals with the small-signal stability analysis of a dc-distribution electrical power system (EPS) sourced by permanent-magnet synchronous generator (PMSG), which is one of the main topology candidate for future more-electric aircraft (MEA). A detailed mathematical model is developed and comprehensive EPS modal analysis including eigenvalues sensitivity and participation factor performed...
The switched mode dc-dc converters have been extensively analyzed for an appropriate method of modeling and analysis along with selection of a suitable control technique for improved stability. Various approaches are followed to develop and analyze a suitable scheme for the control of dc-dc converters. Stability is the primary goal in the design of any controller, which can be achieved by appropriate...
This paper studies the dynamic voltage stability of a typical aircraft power system - variable frequency generation system loaded with PWM rectifier as a constant power load. The L-CCR filter is used for reducing input current harmonics of the rectifier. It establishes the small-signal model of the system. The parameters dominating the system stability were studied based on the eigenvalues of the...
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