Selective Harmonic Measurement and Compensation Using Smart Inverters in a Microgrid with Distributed Generation

Sousa, Tiago J. C.; Monteiro, Vítor; Afonso, José Augusto Bastos

doi:10.1109/indin.2018.8471952

Cited by 3 publications

(4 citation statements)

References 40 publications

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“…Therefore, the effectiveness of the ZSF is greater the smaller its zero-sequence impedance against the respective system impedance at the PCC. In this context, the main function of the ZSB is to adapt the total impedance in the PCC seen by the filter, aiming for a performance of the ZSF in line with the mandatory standards [20][21][22][23][24][25][26][27].…”

Section: Electromagnetic Zero-sequence Supressor (Zss)mentioning

confidence: 99%

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New Topology of a Hybrid, Three-Phase, Four-Wire Shunt Active Power Filter

Freitas

Oliveira

et al. 2023

Energies

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With a view to reducing harmonic content in electrical power systems, and, consequently, improving power quality level, filters and other harmonic compensation devices are widely used. In the category of filters, they can be distinguished into two classes that are related to the operating mode, active or passive, both widely known and applied in electrical power grids and in the most diverse industry sectors. In this sense, taking into account the use of compensating devices in four-wire electrical systems feeding single-phase, non-linear loads, this paper presents a new hybrid arrangement of harmonic compensation that incorporates both active and passive filtering, which performs all functions concerning the harmonic compensation of a four-leg shunt active power filter. In this hybrid arrangement, the harmonic filtering of positive and negative sequence components is performed by a three-leg shunt active power filter, while the filtering of zero-sequence harmonics is attributed to the electromagnetic zero-sequence suppressor. The results, which confirm the effectiveness of the proposed hybrid arrangement, are proven through simulations and experimental tests in different operating scenarios, revealing a substantial improvement in the system’s power factor, as well as a reduction in harmonic distortions.

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Section: Electromagnetic Zero-sequence Supressor (Zss)mentioning

confidence: 99%

“…Solutions involving passive, active, or hybrid power filters are employed with the aim of reducing or even eliminating the problems caused by harmonic currents, as presented in [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

New Topology of a Hybrid, Three-Phase, Four-Wire Shunt Active Power Filter

Freitas

Oliveira

et al. 2023

Energies

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“…Some of these challenges are related to the standardization of voltage levels, network codes, and protection systems, as presented in [69][70][71]. In [72], the context of smart homes is presented, foreseeing the use of auxiliary services such as selective harmonics measurement for the main AC grid, while control solutions for power electronics As investigated in [60][61][62], hybrid AC/DC grids play a preponderant role in the residential sector, also contributing to the importance of smart homes as central to the development of future power grids. In this sense there are worldwide several projects, concluded or ongoing concerning hybrid AC/DC grids, permitting a greater attractiveness for power grids in the coming decades, e.g., as shown in [63][64][65].…”

Section: Hybrid Ac/dc Gridsmentioning

confidence: 99%

Section: Hybrid Ac/dc Gridsmentioning

confidence: 99%

Review of a Disruptive Vision of Future Power Grids: A New Path Based on Hybrid AC/DC Grids and Solid-State Transformers

et al. 2021

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Power grids are evolving with the aim to guarantee sustainability and higher levels of power quality for universal access to electricity. More specifically, over the last two decades, power grids have been targeted for significant changes, including migration from centralized to decentralized paradigms as a corollary of intensive integration of novel electrical technologies and the availability of derived equipment. This paper addresses a review of a disruptive vision of future power grids, mainly focusing on the use of hybrid AC/DC grids and solid‑state transformers technologies. Regarding hybrid AC/DC grids in particular, they are analyzed in detail in the context of unipolar and bipolar DC grids (i.e., two‑wire or three‑wire DC grids), as well as the different structures concerning coupled and decoupled AC configurations with low‑frequency or high‑frequency isolation. The contextualization of the possible configurations of solid‑state transformers and the different configurations of hybrid transformers (in the perspective of offering benefits for increasing power quality in terms of currents or voltages) is also analyzed within the perspective of the smart transformers. Additionally, the paper also presents unified multi‑port systems used to interface various technologies with hybrid AC/DC grids, which are also foreseen to play an important role in future power grids (e.g., the unified interface of renewable energy sources and energy storage systems), including an analysis concerning unified multi‑port systems for AC or DC grids. Throughout the paper, these topics are presented and discussed in the context of future power grids. An exhaustive description of these technologies is made, covering the most relevant and recent structures and features that can be developed, as well as the challenges for the future power grids. Several scenarios are presented, encompassing the mentioned technologies, and unveiling a progressive evolution that culminates in the cooperative scope of such technologies for a disruptive vision of future power grids.

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