Design and implementation of AC-DC hybrid multi-port energy router for power distribution networks

Yuan, Liqiang; Wei, Shusheng; Ge, Junjie; Zhao, Zhengming; Huang, Renle

doi:10.1109/icems.2015.7385104

Cited by 14 publications

(10 citation statements)

References 9 publications

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“…soft open points [2], hybrid transformers [3], and loop balance controller [4, 5], were proposed to act as critical nodes in future distribution systems to interlink grid segments with the same or different voltage levels. These new devices, herein generally classified as solid‐state transformers (SSTs), share several standard functions, including, Serving as multiport nodes to interconnect distribution grids with the same or different voltage forms and levels [1]; Serving as interfaces for distributed generation sites and energy storage systems [1, 2]; Providing power flow and voltage control, electrical isolation, and power quality enhancements [1–19]; Enabling fault detection, isolation, post‐fault reconfiguration and restoration [1, 2, 4, 5]; and, Facilitating flexible power dispatch and optimisation when multiple SSTs work in coordination [1, 2, 4, 5]. …”

Section: Introductionmentioning

confidence: 99%

Overview of grounding schemes for solid‐state transformers in distribution networks

Zang

Wang

Zhang

et al. 2021

IET Generation Trans & Dist

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Proposed to be the critical enabling component for future distribution networks, solidstate transformers (SSTs) have drawn much attention lately. They have a massive potential to help reduce size and weight, improve efficiency, integrate microgrids, renewables and energy storages in distribution systems, and can fulfil multiple grid functions such as bidirectional power flow control, fault isolation, system reconfiguration, and post-fault restoration. The introduction of these power electronics devices in distribution systems, however, also brings new challenges to the grid. Extra levels of electromagnetic interference, stray current, and personnel safety are among the most prominent practical issues that proper grounding arrangements can address. In this paper, considerations that should be factored into the grounding scheme design for SST ports with different voltage forms and levels are thoroughly reviewed and summarised. The characteristics of various grounding schemes used in AC and DC distribution systems are evaluated and compared in detail from different perspectives. Based on the comprehensive review, several combinations of grounding schemes are recommended for typical SSTs. In addition, the inclusion of new relay protection devices in the SST grounding scheme design, considering their characteristics and unique requirements, to enhance protection and reliability is also discussed.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%

Overview of grounding schemes for solid‐state transformers in distribution networks

Zang

Wang

Zhang

et al. 2021

IET Generation Trans & Dist

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“…Based on the functions of SST, ERs also need to achieve the intelligent management and real-time communication of the smart grid, DERs, and loads. Benefiting from the progress in power electronics and communication technology, ERs are developing rapidly and showing attractive features in power quality control [9], AC-DC hybrid distribution [10], active management of bidirectional power flows [11], convenient access to DERs [12], [13], energy management optimization [14], [15], etc. It appears that ERs can play an important role in the future smart grid.…”

Section: Introductionmentioning

confidence: 99%

“…However, the structures presented in [16]- [18] lack the support of experimental results. Literature [10] introduced the design and implementation of a multi-port ER of which the performance was verified by experiments. Literature [19] introduced a household ER that is suitable for low-voltage and small-capacity load area and presented the corresponding mathematical model and control strategy.…”

Section: Introductionmentioning

confidence: 99%

“…Literature [20] discussed the different operation modes of the ER and validate the design of a single phase ER by simulations and experimental results. Nevertheless, no energy storage device is included in the ERs presented in [10], [19], and [20], and there is no discussion on the energy management strategy of ERs. Considering that the energy storage device can support the regular operation of ERs in islanded mode and achieve energy distribution optimization in grid-connected mode, the energy storage device should be an essential component of ERs, and it is necessary to study the energy management strategy that is suitable for ERs in low-voltage distribution network.…”

Section: Introductionmentioning

confidence: 99%

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An AC–DC Hybrid Multi-Port Energy Router With Coordinated Control and Energy Management Strategies

Liu

Zhou

et al. 2019

IEEE Access

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Energy router is an intelligent power electronic device that can realize the active management of power flow and provide convenient access to distributed energy resource. This paper presents the structure of an AC-DC hybrid multi-port energy router, which acts as the interface between the power consumer and the distribution network. The corresponding coordinated control strategy is developed to guarantee the regular operation of the energy router and a mode switch strategy with advanced compensation is proposed to achieve seamless transition between grid-connected mode and islanded mode. A novel and practical fuzzy logic controller considering unit-time electricity charge is proposed for the energy router to prolong battery life, to improve economic benefits of power consumers, and to smooth fluctuations of renewable energy generation or load consumption. The simulation and experimental results have validated the coordinated control and energy management strategies and demonstrated that the energy router has satisfactory performance.

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“…According to the different types of technology implementations, the ER can be typically divided into three categories as: SST‐based ER, multi‐port converter (MPC)‐based ER and power line communication (PLC)‐based ER [2]. Among which, MPC‐based is widely applied in the medium‐/low‐voltage distribution networks or micro‐grids to achieve the different electricity types (AC/DC) conversion and stable bus voltage regulation [6].…”

Section: Introductionmentioning

confidence: 99%

Decentralised DC voltage control and flexible power regulation for multi‐port converter‐based energy router

Huang

Wang

Chen

et al. 2019

J. eng.

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Design and implementation of AC-DC hybrid multi-port energy router for power distribution networks

Cited by 14 publications

References 9 publications

Overview of grounding schemes for solid‐state transformers in distribution networks

Overview of grounding schemes for solid‐state transformers in distribution networks

An AC–DC Hybrid Multi-Port Energy Router With Coordinated Control and Energy Management Strategies

Decentralised DC voltage control and flexible power regulation for multi‐port converter‐based energy router

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