Design of a Medium Voltage Mobile Utilities Support Equipment based Solid State Transformer (MUSE-SST) with 10 kV SiC MOSFETs for Grid Interconnection

Anurag, Anup; Acharya, Sayan; Prabowo, Yos; Jakka, Venkat Nag Someswar Rao; Bhattacharya, Subhashish

doi:10.1109/pedg.2018.8447766

Cited by 28 publications

(3 citation statements)

References 12 publications

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“…Also, the HF transformer is chosen as a star-delta connection to reduce the turn ratio. The smaller and closer turns of the HF transformer enable the ZVS operation [40]. To reduce the harmonics and inrush current effects, the soft-shift modulation control is offered for the isolation stage of the ST.…”

Section: Introductionmentioning

confidence: 99%

Soft-Switching Smart Transformer Design and Application for Photovoltaic Integrated Smart City Power Distribution

Esenboga¹,

Demirdelen²

2022

Sustainability

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Smart city power distributions have become promising technologies to meet the demand for energy in developed countries. However, increase in smart grids causes several power quality problems on the smart grid, in particular, current and voltage harmonic distortions, sudden voltage sag and swells, fault current, and isolation deterioration. Smart transformers are potential solutions to improve the power quality on the electric grid. They present energy efficiency, ensure grid reliability and power flow control, voltage regulation, bidirectional power flow, fault current limiting, harmonic blocking, and galvanic isolation. Therefore, this paper offers an optimal selection of a three-stage (AC-DC-DC-AC) smart transformer model and power control strategy for solar PV power plant integrated smart grids. The topology of the rectifier, isolated bidirectional converter, and inverter has soft-switching features. This enables low conduction loss, low electromagnetic interference (EMI), high efficiency, achievable zero-voltage switching for converters, and zero-current switching for electrical auxiliary systems. Operation strategies of the proposed ST, PWM control, voltage, and current control between converters, including a medium-voltage (MV) high-frequency transformer to realize a 10 kVA, 450 Vdc to 220 Vdc, or 220 Vac ST, are presented. Significantly, the ST prototype achieves 96.7% conversion efficiency thanks to its control strategy, even under unstable power generation conditions from the solar PV plant. Experimental results obtained on the 344 Vac 10.4 A load current validates the dv/dt rate 6.8 kV/us. The dynamic and experimental results of the proposed bidirectional smart transformer demonstrate the success in preventing power quality problems for photovoltaic integrated smart city power distribution.

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Section: Introductionmentioning

confidence: 99%

Soft-Switching Smart Transformer Design and Application for Photovoltaic Integrated Smart City Power Distribution

Esenboga¹,

Demirdelen²

2022

Sustainability

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“…In addition, galvanic isolation and voltage level conversion is done by a three-phase medium frequency transformer (MFT). These topologies can provide full-functionalities of the SST [2], [3], [4], and [5]. Up to now many control techniques are used for AC-AC SSTs, they are emphasizing on the dynamic performance of the SST in the distribution grid.…”

Section: Introductionmentioning

confidence: 99%

Two-stage Input-Output Feedback linearization controller for AC-AC converter-based SST

Beiranvand

Rokrok

Açıkgöz

et al. 2019

2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)

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Classical transformers are the most important constituent of the power system and act as a passive interface between high voltage and low voltage systems. They have undesirable characteristics such as poor voltage regulation, large size/weight, sensitivity to harmonics, and poor power flow control. Solid-state Transformers (SSTs), are an emerging power electronics-based technology, sought to replace classical transformers after a century. SSTs are equivalent to a classical transformer with embedded desired functionalities. In this paper, three-phase AC-AC converter with capacitor at the DC-link is employed as power electronic interface in MV and LV side of the SST. Input-output feedback linearization (IOFL) controller is used to control the AC-AC based SST in two stages for controlling the external and internal states. AC-AC SST is linearized by the input-output feedback linearization technique where an internal dynamics is observed. IOFL is used to control the internal dynamics and second stage of the controller in the outer loop. Simulation studies are realized to confirm the applicability of IOFL controller and the control method.

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“…As one of the novel wide-band-gap devices, the 10 kV SiC MOSFETs show promising features, e.g. simpler topology of converters in high voltage applications, reduced complexities of system, and higher efficiency [9]- [13], and show potentials in applying in power generation system [14], power distribution system [15], data centers [16], railway applications [17], and etc.…”

Section: Background and Motivationmentioning

confidence: 99%

Modeling and Reducing the Parasitic Capacitance in Medium-Voltage Inductors

Zhao¹

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Design of a Medium Voltage Mobile Utilities Support Equipment based Solid State Transformer (MUSE-SST) with 10 kV SiC MOSFETs for Grid Interconnection

Cited by 28 publications

References 12 publications

Soft-Switching Smart Transformer Design and Application for Photovoltaic Integrated Smart City Power Distribution

Soft-Switching Smart Transformer Design and Application for Photovoltaic Integrated Smart City Power Distribution

Two-stage Input-Output Feedback linearization controller for AC-AC converter-based SST

Modeling and Reducing the Parasitic Capacitance in Medium-Voltage Inductors

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