Non-Linear Behavioral Modeling for DC-DC Converters and Dynamic Analysis of Distributed Energy Systems

Zheng, Xuemei; Ali, Husan; Wu, Xiaohua; Zaman, Haider; Khan, Shahbaz

doi:10.3390/en10010063

Cited by 12 publications

(7 citation statements)

References 42 publications

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“…Considering two sources in parallel supplying a load, there is a need to avoid circulating current between both sources [36][37][38]. These currents generate undesired losses and fluctuations in the system, so to control the power delivery from paralleled converters there are several techniques [39][40][41][42][43][44].…”

Section: Converter Parallelizationmentioning

confidence: 99%

Wind Energy Harnessing in a Railway Infrastructure: Converter Topology and Control Proposal

et al. 2020

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Long distances in the vicinities of railways are not exploited in terms of wind energy. This paper presents a scalable power electronics approach, aimed to harness the wind potential in a railway infrastructure. The key aspect of this proposal relies on both using the wind energy in the location, and the displaced air mass during the movement of a train along the railway, in order to produce electrical energy. Vertical Axis Wind Turbines (VAWT) are used in order to take advantage of the wind power, and widely used and well-known power converter techniques to accomplish the goal, showing MPPT techniques, parallelization of converters and power delivery with a Solid State Transformer (SST). Results are shown according simulations of the whole system, with and without train activity, resulting that 30.6 MWh of the energy could be generated without the train, and the energy generated with the assistance of the train could reach 32.3 MWh a year. Concluding that almost the 10% of the energy could be provided by the assistance of the train.

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Section: Converter Parallelizationmentioning

confidence: 99%

Wind Energy Harnessing in a Railway Infrastructure: Converter Topology and Control Proposal

et al. 2020

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“…For DC-based DESs, measurement techniques of various frequency response parameters, including impedance parameters, are well established and widely reported in the literature [26,27]. However, for three-phase AC systems, the measurement methods for impedance parameters are not For DC-based DESs, measurement techniques of various frequency response parameters, including impedance parameters, are well established and widely reported in the literature [26,27]. However, for three-phase AC systems, the measurement methods for impedance parameters are not intuitive due to the time-varying nature of the operating point.…”

Section: ( ) =mentioning

confidence: 99%

A dq-Domain Impedance Measurement Methodology for Three-Phase Converters in Distributed Energy Systems

et al. 2018

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A distributed energy system (DES) using controlled power electronics converters delivers power to loads, via conventional, as well as a number of renewable, energy sources. However, stability concerns retard the integration of power electronics converters into an existing DES. Therefore, due to the high penetration of power converters, the overall network analysis of DES is becoming increasingly difficult. Impedance-based DES modeling emerged as an effective technique as it reduces the system into source and load subsystems and offers easier analysis of the dynamic interactions between them. These models can be obtained using either analytical calculations, simulations, or experimental measurements. In this work, firstly, a line-to-line current injection technique is used for the measurement of alternating current (AC) impedances. Since it requires repeated injections, a d q -domain impedance measurement methodology based upon a set of independent perturbations and measurements is proposed. The perturbation is injected via a sweep signal which is preprocessed by the digital signal processor (DSP) prior to injection. The d q reference frame is synchronized with the three-phase AC system using a low-bandwidth phase-locked loop (PLL). The close matching of impedance parameters measured in simulation using the proposed approach with those obtained using analytical expressions and the line-to-line current injection technique verifies the effectiveness of the approach. Furthermore, the method was also implemented experimentally, and the close matching of the results with the analytical and simulation results validates the overall modeling and measurement procedure.

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“…As conventional bidirectional isolated or non-isolated converter control methods and strategies have been widely presented in the literature, details on the related control analyses and design are provided in [26][27][28][29][30][31][32][33][34][35][36][37][38]. Given that the proposed new converter has many different transition control strategies across different states and modes, the switching control is mainly used during the transition process between the switching devices depending on the application requirements.…”

Section: Control Strategymentioning

confidence: 99%

A Multifunctional Isolated and Non-Isolated Dual Mode Converter for Renewable Energy Conversion Applications

Wang

Gan

et al. 2017

Energies

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Abstract:In this paper, a multifunctional isolated and non-isolated dual-mode low-power converter was designed for renewable energy conversion applications such as photovoltaic power generation to achieve different operating modes under bi-directional electrical conversion. The proposed topology consists of a bidirectional non-isolated DC/DC circuit and an isolated converter with a high-frequency transformer, which merge the advantages of both the conventional isolated converter and non-isolated converter with the combination of the two converter technologies. Compared with traditional converters, the multifunctional converter can not only realize conventional bi-directional functions, but can also be applied for many different operation modes and meet the high output/input ratio demands with the two converter circuits operating together. A novel control algorithm was proposed to achieve the various functions of the proposed converter. An experimental platform based on the proposed circuit was established. Both the simulation and experimental results indicated that the proposed converter could provide isolated and non-isolated modes in different applications, which could meet different practical engineering requirements.

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Non-Linear Behavioral Modeling for DC-DC Converters and Dynamic Analysis of Distributed Energy Systems

Cited by 12 publications

References 42 publications

Wind Energy Harnessing in a Railway Infrastructure: Converter Topology and Control Proposal

Wind Energy Harnessing in a Railway Infrastructure: Converter Topology and Control Proposal

A dq-Domain Impedance Measurement Methodology for Three-Phase Converters in Distributed Energy Systems

A Multifunctional Isolated and Non-Isolated Dual Mode Converter for Renewable Energy Conversion Applications

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