Reactive power control strategies for UNIFLEX-PM Converter

Pipolo, Sabino; Bifaretti, Stefano; Bonaiuto, V.; Tarisciotti, Luca; Zanchetta, Pericle

doi:10.1109/iecon.2016.7793903

Cited by 9 publications

(6 citation statements)

References 6 publications

(7 reference statements)

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“…Q1 boosts the current amplitude so that the cont power demanded by Port 2 and Port 3. In the literature, several posed to share the reactive power [77], mainly based on the follo and apparent power proportional share; (2) active and apparen fuzzy logic approach. The latter is used to provide the set poin power flow.…”

Section: Uniflex-pm Three-port Controlmentioning

confidence: 99%

Power Electronics Converters for the Internet of Energy: A Review

et al. 2022

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This paper presents a comprehensive review of multi-port power electronics converters used for application in AC, DC, or hybrid distribution systems in an Internet of Energy scenario. In particular, multi-port solid-state transformer (SST) topologies have been addressed and classified according to their isolation capabilities and their conversion stages configurations. Non-conventional configurations have been considered. A comparison of the most relevant features and design specifications between popular topologies has been provided through a comprehensive and effective table. Potential benefits of SSTs in distribution applications have been highlighted even with reference to a network active nodes usage. This review also highlights standards and technical regulations in force for connecting SSTs to the electrical distribution system. Finally, two case studies of multi-port topologies have been presented and discussed. The first one is an isolated multi-port bidirectional dual active bridge DC-DC converter useful in fast-charging applications. The second case of study deals with a three-port AC-AC multi-level power converter in H-Bridge configuration able to replicate a network active node and capable of routing and controlling energy under different operating conditions.

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Section: Uniflex-pm Three-port Controlmentioning

confidence: 99%

Power Electronics Converters for the Internet of Energy: A Review

et al. 2022

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“…In [41], the control of power flow profiles has been studied in different network conditions, but the UNIFLEX converter has been allowed to operate with only two ports. In [42], the active and reactive power control capabilities of the three-port UNIFLEX configuration have been investigated, highlighting the conditions that permit to operate at a unitary power factor.…”

Section: Linkmentioning

confidence: 99%

“…A detailed analysis has shown some boundaries on the power flow capability [41]. However, such constraints can be overcome by employing specific strategies to control the reactive power flow [30,42]. The nominal parameters of the UNIFLEX-PM converter are shown in Table 1.…”

Section: Uniflex Convertermentioning

confidence: 99%

Power Flow Management by Active Nodes: A Case Study in Real Operating Conditions

et al. 2021

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The role of distributor system operators is experiencing a gradual but relevant change to include enhanced ancillary and energy dispatch services needed to manage the increased power provided by intermittent distributed generations in medium voltage networks. In this context, the paper proposes the insertion, in strategic points of the network, of specific power electronic systems, denoted as active nodes, which permit the remote controllability of the active and reactive power flow. Such capabilities, as a further benefit, enable the distributor system operators to provide ancillary network services without requiring any procurement with distributed generation systems owners. In particular, the paper highlights the benefits of active nodes, demonstrating their capabilities in reducing the inverse power flow issues from medium to high voltage lines focusing on a network cluster including renewable energy resources. As a further novelty, this study has accounted for a real cluster operated by the Italian distributor system operator Areti. A specific simulation model of the electrical lines has been implemented in DigSilent PowerFactory (DIgSILENT GmbH–Germany) software using real operating data obtained during a 1-year measurement campaign. A detailed cost-benefit analysis has been provided, accounting for different load flow scenarios. The results have demonstrated that the inclusion of active nodes can significantly reduce the drawbacks related to the reverse power flow.

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“…Hybrid-cell modular F u l l y p h a s e m o d u l a r UNIFLEX [39] EPRI [20] ABB [10] FREEDM Gen I [15] Fully modular multi-cell TIPS [56] Dyna C [74] ETH [33] BIST [38] P E T T […”

Section: P Vmentioning

confidence: 99%

“…Authors in [39] under a UNIFLEX project have discussed reactive power control for a three-port fully phase modular SST as illustrated in Figure 26 and presented a supervisory control to maintain reactive power between the three ports. Two methods are discussed to balance reactive power: (a) fuzzy logic control (FLC) method and (b) proportional reactive power (PRP) balancing method.…”

Section: Energy Routing Grid Interconnection and Reactive Powermentioning

confidence: 99%

Solid State Transformers: Concepts, Classification, and Control

et al. 2020

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Increase in global energy demand and constraints from fossil fuels have encouraged a growing share of renewable energy resources in the utility grid. Accordingly, an increased penetration of direct current (DC) power sources and loads (e.g., solar photovoltaics and electric vehicles) as well as the necessity for active power flow control has been witnessed in the power distribution networks. Passive transformers are susceptible to DC offset and possess no controllability when employed in smart grids. Solid state transformers (SSTs) are identified as a potential solution to modernize and harmonize alternating current (AC) and DC electrical networks and as suitable solutions in applications such as traction, electric ships, and aerospace industry. This paper provides a complete overview on SST: concepts, topologies, classification, power converters, material selection, and key aspects for design criteria and control schemes proposed in the literature. It also proposes a simple terminology to identify and homogenize the large number of definitions and structures currently reported in the literature.

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Reactive power control strategies for UNIFLEX-PM Converter

Cited by 9 publications

References 6 publications

Power Electronics Converters for the Internet of Energy: A Review

Power Electronics Converters for the Internet of Energy: A Review

Power Flow Management by Active Nodes: A Case Study in Real Operating Conditions

Solid State Transformers: Concepts, Classification, and Control

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