A Multi-Directional Power Converter for a Hybrid Renewable Energy Distributed Generation System with Battery Storage

The focus of this paper is on power flow control in the asymmetric quad-active-bridge (QAB) converter and its limitations imposed by uneven values of parasitic elements in the isolation transformer. The QAB converter under study is intended for solid-state transformer applications in asymmetric configuration, where one of the ports is placed at the low voltage side and rated for the threefold power of the medium voltage ports. Significant imbalance between leakage inductance could be observed between them. The steady-state analysis of the asymmetric QAB converter and assessment of power losses using numerical simulation are provided. Experimental waveforms were obtained using a prototype rated for cumulative MV dc link of 2400 V and power of 30 kW.

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“…(15) for any k. Below, all powers are assessed in unit, where a unit corresponds to PQAB defined in Eq. (11).…”

Section: B Steady-state Analysis Of the Asymmetric Qab Convertermentioning

confidence: 99%

“…To reduce number of units along with the capital costs, the quad-active-bridge (QAB) converter [11], [12] was applied to the SST in asymmetric configuration as shown in Fig. 1 [13].…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of asymmetric quad-active-bridge converter

Chub

Costa

Liserre

2017

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

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“…On the other hand, the solar varies over time and is dependent on environmental conditions (temperature, irradiance, etc.). That combining a photovoltaic generation system with a wind energy conversion system will reduce the zero-power intervals is suggested since sunny days are usually quiet and strong winds are frequently occurred at cloudy days or at nighttimes [3]. Hence, hybrid systems have the potential to arrange undesired conditions.…”

Section: Introductionmentioning

confidence: 99%

A Novel Multi-loop Fuzzy Logic Dynamic Controller for Wind/Photovoltaic-Grid Interface DC Energy Utilization Farm

Sharaf¹,

Altaş²,

Ozkop³

2024

RE&PQJ

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This paper proposes a novel control system for control of a hybrid wind/photovoltaic (PV) farm utilization with alternative power source for DC type loads. A controller consisting of six different loop controllers is mainly used to regulate the DC-DC converter to reduce a weighted total sum of all loop errors, to mainly track a given speed reference trajectory depicting the demand for discharge or flow and also to ensure power quality, reliability and stability. The proposed control function is digitally simulated using the MATLAB/Simulink/ SimPower System software environment. The dynamic performance of the hybrid system is examined for the control system validation under normal and abnormal operating conditions.

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“…Multidirectional converter has recently been proposed as an alternative power conversion concept which has both rectifier and inverter capability [ 26 , 27 ]. Most desired features of multidirectional converter can be fulfilled by using Matrix Converter structures.…”

Section: Introductionmentioning

confidence: 99%

Novel Modulation Method for Multidirectional Matrix Converter

Toosi

Misron

Hanamoto

et al. 2014

The Scientific World Journal

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This study presents a new modulation method for multidirectional matrix converter (MDMC), based on the direct duty ratio pulse width modulation (DDPWM). In this study, a new structure of MDMC has been proposed to control the power flow direction through the stand-alone battery based system and hybrid vehicle. The modulation method acts based on the average voltage over one switching period concept. Therefore, in order to determine the duty ratio for each switch, the instantaneous input voltages are captured and compared with triangular waveform continuously. By selecting the proper switching pattern and changing the slope of the carriers, the sinusoidal input current can be synthesized with high power factor and desired output voltage. The proposed system increases the discharging time of the battery by injecting the power to the system from the generator and battery at the same time. Thus, it makes the battery life longer and saves more energy. This paper also derived necessary equation for proposed modulation method as well as detail of analysis and modulation algorithm. The theoretical and modulation concepts presented have been verified in MATLAB simulation.

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A Multi-Directional Power Converter for a Hybrid Renewable Energy Distributed Generation System with Battery Storage

Cited by 4 publications

References 0 publications

Analysis and design of asymmetric quad-active-bridge converter

Analysis and design of asymmetric quad-active-bridge converter

A Novel Multi-loop Fuzzy Logic Dynamic Controller for Wind/Photovoltaic-Grid Interface DC Energy Utilization Farm

Novel Modulation Method for Multidirectional Matrix Converter

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