Indirect Front-End Smart Transformer with Reactive Power Management

Guzman, Pablo; Vázquez, N.; Liserre, Marco

doi:10.1109/ipemc-ecceasia48364.2020.9367850

Cited by 4 publications

(3 citation statements)

References 10 publications

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“…However, the LMM mathematical model has the issue of the power transfer range overlapping in various operating modes (17) . As a result, finding optimal solutions for current stress is challenging due to power transfer and phase shift ratio limitations (18) . The TPS control technique uses a cost function to address the issue of current stress optimization for specific power transfer.…”

Section: Optimal Unified Tps Control Strategymentioning

confidence: 99%

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Optimal Unified Triple-Phase-Shift Control Technique for Dual Active Bridge Converter

Chaturvedi¹,

Ansari²,

Palwalia³

2023

IJST

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Objectives:The variable output voltage from the wind energy conversion system is effectively regulated through the Solid-State Transformer (SST) using Dual Active Bridge (DAB) converter employing a Triple phase shift (TPS) control technique. Methods: A wind energy based system integrated with SST employing a DAB converter is proposed. The system comprises of Permanent Magnet Synchronous Generator (PMSG) based Wind Energy System (WES), SST, and resistive load. The SST provides an easy interface between the load and the WES.MATLAB Simulink-based analysis is done to compare the various control techniques used for DAB dc-dc converter. Findings: The DAB converter provides several benefits including its ability to provide bi-directional power flow, making it suitable for use in applications where power can flow in either direction, such as renewable energy systems. The Single-Phase Shift (SPS) is among the majorly adopted control strategies for DAB converters however it performs unsatisfactorily with varying load conditions. In this paper, a Triple-Phase Shift (TPS) control strategy has been reported. A detailed mathematical analysis along with MATLAB Simulink based results suggest that this control technique reduces current stress on semiconductor switches by reducing peak inductor current by almost 23% and 9% as compared to conventional phase shift modulation technique, therefore, improving the efficiency of the converter. Novelty: The phase shift ratio used in the TPS control technique for the DAB converter is modified by incorporating a virtual power component that enhances the dynamic response of the output voltage.

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Section: Optimal Unified Tps Control Strategymentioning

confidence: 99%

“…With the help of k and p*, different optimal phase-shift ratios of TPS control are selected from Eq. ( 17) and (18). Finally, the PWM pulse generator is used to generate the pulse signal for the switches of the DAB converter.…”

Section: Optimal Unified Tps Control Strategymentioning

confidence: 99%

Optimal Unified Triple-Phase-Shift Control Technique for Dual Active Bridge Converter

Chaturvedi¹,

Ansari²,

Palwalia³

2023

IJST

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“…The Impact of SSTs on the distribution grid is studied in [6,18,[21][22][23][24][25] even with the possibility of power supply during fault conditions [26]. In [27], a closer look is taken at the power delivery characteristics of SSTs; further requirements have been mentioned in [28].…”

Section: Introductionmentioning

confidence: 99%

Decision Process for Identifying Appropriate Devices for Power Transfer between Voltage Levels in Distribution Grids

Dyussembekova,

Schütt,

Leiße

et al. 2024

Energies

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During the energy transition, new types of electrical equipment, especially power electronic devices, are proposed to increase the flexibility of electricity distribution grids. One type is the solid-state transformer (SST), which offers excellent possibilities to improve the voltage quality in electricity distribution grids and integrate hybrid AC/DC grids. This paper compares SST to conventional copper-based power transformers (CPT) with and without an on-load tap changer (OLTC) and with additional downstream converters. For this purpose, a corresponding electricity distribution grid is set up in the power system analysis tool DIgSILENT PowerFactory 2022. A DC generator like a photovoltaic system, a DC load like an electric vehicle fast charging station, and an AC load are connected. Based on load flow simulations, the four power transformers are compared concerning voltage stability during a generator-based and a load-based scenario. The results of load flow simulations show that SSTs are most valuable when additional generators and loads are to be connected to the infrastructure, which would overload the existing grid equipment. The efficiency of using SSTs also depends on the parameters of the electrical grid, especially the lengths of the low-voltage (LV) lines. In addition, a flowchart-based decision process is proposed to support the decision-making process for the appropriate power transformer from an electrical perspective. Beyond these electrical properties, an evaluation matrix lists other relevant criteria like characteristics of the installation site, noise level, expected lifetime, and economic criteria that must be considered.

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