Dynamic average modeling of a bidirectional solid state transformer for feasibility studies and real-time implementation

Martínez-Velasco, Juan A.; Alepuz, Salvador; González-Molina, F.; Martin-Arnedo, J.

doi:10.1016/j.epsr.2014.08.005

Cited by 30 publications

(33 citation statements)

References 32 publications

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“…The configuration selected for the basic cell is the single-phase DAB converter presented in [13,14], although the present model incorporates some changes in the control strategies and the MV-side design is three-phase, while the configuration used in [13,14] was single-phase. As for the LV side, it is based on the three-phase four-wire configuration and control strategy implemented by the authors in some previous works; see [15,17]. Figure 1a shows the configuration of the converter cell that would be the base of the modular design implemented in this work.…”

Section: Sst Configurationmentioning

confidence: 99%

“…Input stage: The control strategy for any single cell follows the principles used in some previous works, see [15,17]. The input stage is implemented by means of a multilevel converter; see, for instance [13,20].…”

Section: Switching Strategies and Control Descriptionmentioning

confidence: 99%

“…The proposed bidirectional SST design is based on the commonly accepted three-stage design [15][16][17][18]: (1) the input voltage at power frequency is first converted into dc voltage by the MV-side three-phase converter working as rectifier; (2) the isolation stage is implemented by means of a dual active bridge (DAB) dc-dc converter, with an intermediate high-frequency transformer that reduces the MV square waveform into a LV square waveform; (3) a low voltage (LV) three-phase dc/ac converter working as inverter provides the output power-frequency ac voltage to LV loads.…”

Section: Sst Configurationmentioning

confidence: 99%

“…The three-phase four-wire LV converter allows connecting loads and/or generators with either one, two or three phases. A Space Vector Modulation (SVM) PWM switching strategy has been used in the LV-side converter, see Figure 5 and references [15,17,26]. The main task of the LV-side converter controllers is to achieve positive-sequence capacitor voltages (i.e., to have balanced voltages at capacitor terminals) with stable frequency and voltage, independently of the power direction (i.e., load or generation) and the current balance.…”

mentioning

confidence: 99%

“…Isolation stage: The amount and direction of the active power flow between primary and secondary of each high-frequency transformer is according to the following expression [25] (see also [15][16][17]):…”

mentioning

confidence: 99%

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EMTP Model of a Bidirectional Cascaded Multilevel Solid State Transformer for Distribution System Studies

et al. 2017

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This paper presents a time-domain model of a MV/LV bidirectional solid state transformer (SST). A multilevel converter configuration of the SST MV side is obtained by cascading a single-phase cell made of the series connection of an H bridge and a dual active bridge (dc-dc converter); the aim is to configure a realistic SST design suitable for MV levels. A three-phase four-wire converter has been used for the LV side, allowing the connection of both load/generation. The SST model, including the corresponding controllers, has been built and encapsulated as a custom-made model in the ATP version of the EMTP for application in distribution system studies. Several case studies have been carried out in order to evaluate the behavior of the proposed SST design under different operating conditions and check its impact on power quality.

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Section: Sst Configurationmentioning

confidence: 99%

Section: Switching Strategies and Control Descriptionmentioning

confidence: 99%

Section: Sst Configurationmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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EMTP Model of a Bidirectional Cascaded Multilevel Solid State Transformer for Distribution System Studies

et al. 2017

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Power Electronics Applications

Martínez-Velasco

Martin-Arnedo²

2019

Transient Analysis of Power Systems

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DC fault analysis of solid‐state transformer using circuit equivalent

Kamble,

Chaturvedi,

Borghate

et al. 2024

Circuit Theory & Apps

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The use of power converters in modern power systems is making the system more active. To enhance the future power grid's reliability, efficiency, interactivity, and security, digital controllers and power electronic circuits are being employed. One critical component of the power system is the 50‐Hz transformer, which is currently robust. However, there is growing interest in solid‐state transformers (SSTs) or power electronic transformers (PETs) as potential alternatives to conventional transformers. These alternatives are particularly relevant for the future grid, which will have a high penetration of renewable energy sources, electric vehicles, and nonlinear loads. To analyze the impact of faults in the power network, it is necessary to establish an accurate circuit model for SSTs, which has not been adequately addressed in the existing literature. This research paper proposes an averaged representation of SSTs and compares the results of switched and averaged models under varying load conditions for the designed SST. Additionally, an equivalent circuit model is developed for DC fault analysis using transformation techniques and a transformer analogy to shift parameters to the DC fault location. The proposed circuit equivalent model is compared with the switched model, offering accurate and efficient results for a pole‐to‐pole and pole‐to‐ground DC fault.

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Dynamic average modeling of a bidirectional solid state transformer for feasibility studies and real-time implementation

Cited by 30 publications

References 32 publications

EMTP Model of a Bidirectional Cascaded Multilevel Solid State Transformer for Distribution System Studies

EMTP Model of a Bidirectional Cascaded Multilevel Solid State Transformer for Distribution System Studies

Power Electronics Applications

DC fault analysis of solid‐state transformer using circuit equivalent

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