Power quality with solid state transformer integrated smart-grids

Vaca-Urbano, Fernando; Alvarez-Alvarado, Manuel S.

doi:10.1109/isgt-la.2017.8126684

Cited by 21 publications

(9 citation statements)

References 12 publications

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“…Another great advantage of using SST is the integration of energy storage systems and distributed energy resources (DERs), which could enhance the PQ and increase power efficiency, leading to a stable system operation [135].…”

Section: B Microgrid Applicationmentioning

confidence: 99%

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

et al. 2020

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Solid-state transformer (SST) is an emerging technology integrating with a transformer power electronics converters and control circuitry. This paper comprehensively reviews the SST topologies suitable for different voltage levels and with varied stages, their control operation, and different trends in applications. The paper discusses various SST configurations with their design and characteristics to convert the input to output under unipolar and bipolar operation. A comparison between the topologies, control operation and applications are included. Different control models and schemes are explained. Potential benefits of SST in many applications in terms of controllability and the synergy of AC and DC systems are highlighted to appreciate the importance of SST technologies. This review highlights many factors including existing issues and challenges and provides recommendations for the improvement of future SST configuration and development.

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Section: B Microgrid Applicationmentioning

confidence: 99%

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

et al. 2020

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“…The simplest form of the power angle equation and is basic to an understanding of all stability problems. The relation shows that the power transmitted depends upon the transfer reactance and the angle between the two voltages [16][17][18].…”

Section: B the Power-angle Equationmentioning

confidence: 99%

Análisis de Estabilidad del Sistema de Potencia de una micro-red Híbrida para Operación Conectado y No-conectado a la red Utilizando el Software ETAP

et al. 2021

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El este artículo se trabajó bajo un diseño de micro-red híbrida que incluye generación fotovoltaica y red eléctrica para realizar un análisis de estabilidad de la respuesta de la micro-red considerando escenarios de operación aislada y conectada a la red red. La metodología de análisis de estabilidad se desarrolló utilizando el software ETAP, a partir del modelado y simulación de 4 casos correspondientes a distintos escenarios de operación de la micro-red de carga concentrada de 400 kW, en los que se identificó las posibles fallas de estabilidad. Finalmente se probó y resolvió el peor tipo de falla ocurrida, determinando que el sistema fotovoltaico no influye en la estabilidad en operación aislada, adjudicando la inestabilidad a los dispositivos auxiliares de la red, y a la rapidez de respuesta de los mismos a las fallas. Se concluyó que el tiempo de despeje crítico y el ángulo de despeje crítico de la falla son cruciales para saber si un sistema de energía eléctrica podrá volver a una condición estable o volverse inestable.

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“…Table 5 shows the description of the electrical circuit and mathematical model of each stage of the SST. The deduction of each formulation is presented in [26], where i Li is the current flowing into the converter, V grid is the voltage of the grid, m represents the modulation index, V rout is the MCHBC voltage output, R i is the resistance of the input filter, L i is the inductance of the input filter, E CHVDC is the energy storage in the high-voltage DC link, V LVDC is the voltage in the low side of the transformer, V HVDC is the voltage in the high side of the transformer, f S is the switching frequency of the IGBTs, L DAB is leakage inductance of the transformer, P DAB is the power required by the system, ϕ is the phase angle between the high-and low-voltage side of the transformer, E CLVDC is the stored energy in the capacitor, V f is the voltage inverter, R f is the filter resistance, L f is the filter inductance, C f is the filter capacitance, i Lf is the current flowing out the inverter, V o is the load voltage, and the terms dq0 represent the frames after applying Park transformation.…”

Section: Solid-state Transformermentioning

confidence: 99%

Solid-State Transformer for Energy Efficiency Enhancement

Vaca-Urbano¹,

Alvarez-Alvarado²,

Recalde³

et al. 2020

Research Trends and Challenges in Smart Grids

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The rapid evolution of power electronic solutions in all around the globe brings a common problem, which is the adoption of nonlinear loads. This fact carries out a strong impact over the quality of power systems and consequently on energy efficiency, since nonlinear loads act as sources of harmonic currents that flow to other loads or even sources, causing non-optimal performance in their operation. Nowadays, conventional transformers are limited to just manage (increase or decrease) voltage level, but they are not able to deal with power quality events, such as harmonics, sag, swell, among others. Hence, there is a need to incorporate a versatile smart device to deal with the challenges previously described for a smart grid environment. This chapter introduces a solid-state transformer (SST) with topology of multilevel cascade H bridge converter as a solution. SST is an emerging technology that has the advantages of low volume, low weight, fault isolation, and other management features. Within its fundamental operation, this chapter presents a detailed description of a SST system comprising communication and control, highlighting their main advantages in comparison with conventional transformer such as mitigation of waveform harmonic distortion, allowance of integration of distributed generation, and bi-directional power flow.

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Power quality with solid state transformer integrated smart-grids

Cited by 21 publications

References 12 publications

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

Análisis de Estabilidad del Sistema de Potencia de una micro-red Híbrida para Operación Conectado y No-conectado a la red Utilizando el Software ETAP

Solid-State Transformer for Energy Efficiency Enhancement

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