Methods of Modulation for Current-Source Single-Phase Isolated Matrix Converter in a Grid-Connected Battery Application

Goh Teck Chiang,Takahide Sugiyama

doi:10.3390/en13153845

Goh Teck Chiang, Takahide Sugiyama

Open Access

https://doi.org/10.3390/en13153845

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Abstract

This paper discusses three methods of modulation for a single-phase isolated matrix converter. The matrix converter is combined with a transformer integration to perform power decoupling control in order to reduce the number of component and capacitor volumes. Due to the reason of (i) Alternating current (AC/AC) direct conversion and (ii) transformer integration, obtaining a clean sinusoidal grid current waveform in the modulation of matrix converter (MC) is important. Three methods of modulation are compared in terms of control complexity, quality waveform, and inductive-capacitive-inductive (LCL) filter sizing. The principal control of each method is described. Finally, a prototype was tested to verify the validity and the effectiveness of grid current control and power decoupling in the spoken circuit structure.

Highlights

Rapidlyexpanding expandinggrowth growthofofbattery batterystorage storagesystem system(BSS)(BSS)has hasurged urgedhigh highdemands demandsfor foraaThe single-phasepower powerconverter. converter.Figure Figure1a1ashows showsthe theapplications applicationssuch suchasashome homeenergy energymanagement management single-phase system (HEMS), uninterruptible power supply (UPS), and small-scale datacenter, which usesaa system (HEMS), uninterruptible power supply (UPS), and small-scale datacenter, which uses single-phase power converter as an interface between BSS and grid (AC V Hz).These single-phase power converter as an interface between BSS and grid (AC 80–240 V 50/60 Hz)
25 shows the relationships between the transformer voltage, MCresolved voltage, and thecurrent fluctuation of the grid inductor current(a)isCarrier smaller than D-FF. It can be and grid inductor based on three modulations: comparison withHowever, D-FF, (b) delta-sigma confirmed from the voltage pulse width that it has an inconsistent frequency due to the conversion with Pulse Density Modulation (PDM), and (c) carrier comparison with zero-vector commutation, respectively. level of quantization error
Switching devices are placed on both sides, a planer transformer is placed in the middle and the fsw_mc

Summary

Introduction

1ashows showsthe theapplications applicationssuch suchasashome homeenergy energymanagement management single-phase system (HEMS), uninterruptible power supply (UPS), and small-scale datacenter, which usesaa system (HEMS), uninterruptible power supply (UPS), and small-scale datacenter, which uses single-phase power converter as an interface between BSS and grid (AC V Hz). These single-phase power converter as an interface between BSS and grid (AC 80–240 V 50/60 Hz). These applicationsrequire requireisolation isolationand andtypically typicallyrate ratefrom from.

Methods

Results

Conclusion