The integration of advanced measuring technologies in distribution systems allows distribution system operators to have better observability of dynamic and transient events. In this work, the applications of distribution grid measurement technologies are explored in detail. The main contributions of this review are (a) a comparison of eight advanced measurement devices for distribution networks, based on their technical characteristics, including reporting periods, measuring data, precision, and sample rate; (b) a review of the most recent applications of micro-Phasor Measurement Units, Smart Meters, and Power Quality Monitoring devices used in distribution systems, considering different novel methods applied for data analysis; and (c) an input-output table that relates measured quantities from micro-Phasor Measurement Units and Smart Meters needed for each specific application found in this extensive review. This paper aims to serve as an important guide for researches and engineers studying smart grids., Peer Reviewed, Postprint (published version)

The paper presents a set of prototype smart grid technologies and services and validates the economic viability of the proposed solution using cost–benefit analysis (CBA). The study considered the EU-funded project called RESOLVD and implemented the technologies and services in a real-life pilot. The paper focuses on the analysis of technological solutions which enhance the operational efficiency and the hosting capacity of low-voltage electricity distribution grids. The solutions provided better integration of a hybrid battery storage system, with the grid interfacing power electronics, smart gateways for the interconnection of assets at the grid edge, and sensors enhancing infrastructure observability and control. The result from the CBA indicates the economic viability of the project, high scalability, and replicability. The economic benefits were realized with the breakeven value of eight secondary substations (SS) and 16 feeders. The scenario test on the DSO’s willingness to pay for the software as a service (SaaS) revealed that the payback period can further be reduced by almost half with a higher internal rate of return (IRR) and net present value (NPV). Both the CBA and scenario tests showed RESOLVD solution can become more economically viable when deployed in largescale. Moreover, the CBA results provide evidence to the energy policy by allowing DSOs to consider both CAPEX and OPEX for better investment decisions. Further, the paper proposes an alternative business approach that shifts from grid reinforcement to service provision. The paper also discusses the research implications on energy policy and business, The RESOLVD project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 773715

The paper presents a set of prototype smart grid technologies and services and validates the economic viability of the proposed solution using cost–benefit analysis (CBA). The study considered the EU-funded project called RESOLVD and implemented the technologies and services in a real-life pilot. the technologies and services on the EU-funded H2020. The paper focuses on the analysis of technological solutions which enhance the operational efficiency and the hosting capacity of low-voltage electricity distribution grids. The solutions provided better integration of a hybrid battery storage system, with the grid interfacing power electronics, smart gateways for the interconnection of assets at the grid edge, and sensors enhancing infrastructure observability and control. The result from the CBA indicates the economic viability of the project, high scalability, and replicability. The economic benefits were realized with the breakeven value of eight secondary substations (SS) and 16 feeders. The scenario test on the DSO’s willingness to pay for the software as a service (SaaS) revealed that the payback period can further be reduced by almost half with a higher internal rate of return (IRR) and net present value (NPV). Both the CBA and scenario tests showed RESOLVD solution can become more economically viable when deployed in largescale. Moreover, the CBA results provide evidence to the energy policy by allowing DSOs to consider both CAPEX and OPEX for better investment decisions. Further, the paper proposes an alternative business approach that shifts from grid reinforcement to service provision. The paper also discusses the research implications on energy policy and business., Peer Reviewed, Objectius de Desenvolupament Sostenible::9 - Indústria, Innovació i Infraestructura, Objectius de Desenvolupament Sostenible::11 - Ciutats i Comunitats Sostenibles, Postprint (published version)

Comunicació de congrés presentada a: VI Congreso Smart Grids: Madrid, 12 Diciembre 2019, organitzat per GrupoTecmaRed i co-organitzat per FutuRed, RESOLVD (Renewable penetration levered by efficient low volatge distribution grids) es un proyecto de investigación financiado por el programa europeo H2020 (2017/20, LCE-01-2016-2017, Ref. 773715,) que tiene como objetivo construir un piloto de red de baja tensión inteligente y eficiente, con capacidad de operación y gestión energética local, que maximice la capacidad de generación renovable inyectable en dicha red y su consumo local. La operación consiste en posibilitar la conexión de líneas de baja tensión de diferentes centros con el propósito de evitar congestiones y variaciones de tensiones en episodios de alta generación o consumo. La gestión energética se realiza mediante baterías instaladas en el centro de transformación con el propósito de minimizar la importación de energía de la red, RESOLVD (Renewable penetration levered by efficient low volatge distribution grids) es un proyecto de investigación financiado por el programa europeo H2020 (2017/20, LCE-01-2016-2017, Ref. 773715)

© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works, This paper proposes a triangular modulation with zero current switching (ZCS) for a hybrid Si-SiC isolated bidirectional DC-DC converter (IBDC). Three of the four legs in the IBDC operate at ZCS and use Si IGBTs, while the fourth operates at zero voltage switching (ZVS) and uses SiC MOSFET. In that case, the turn-off switching losses are concentrated regardless of the direction of the power. The main contribution of this paper resides in the proposed dead-band compensation mechanism. This dead-band compensation is crucial when addressing ZCS modulation and improves the overall efficiency of the full operating range. As a co-benefit, the proposed mix of semiconductor technologies can result in an effective cost reduction compared with a full SiC IBDC. The paper contains a detailed explanation of the implemented modulation applied to an IBDC. The paper contributes to deploy a theoretical implementation where the effect of parasitic capacitance on semiconductors during the dead-band is analytically considered. The presented method results are validated on a laboratory set-up using a 20 kW - 40 kHz hybrid Si-SiC IBDC., Postprint (author's final draft)

Comunicació presentada a: 25th International Conference on Electricity Distribution: Madrid, 3-6 June 2019, This paper analyses the impact of batteries in the hosting capacity of a low voltage grid with prosumers with photovoltaic generation installed under different scenarios. Storage location in the grid has been selected with the criterion of reducing congestion. Two scenarios have been considered: the first with current demand of consumers in the grid and the second by increasing their demand profile proportionally, whilst maintaining the daily load curve shape, until a congestion situation is reached. Simulation of increasing PV generation and storage capacity is performed until a congestion is given, resulting for the first scenario an increase of 140% of PV production is achieved with 100kWh of storage. In the second scenario 230 kWp of maximum hosting capacity can be achieved with 400kWh of storage, This work has been developed in collaboration with the European project RESOLVD of the Horizon 2020 research and innovation program (topic LCE-01-2016-2017) and grant agreement N773715

The paper presents a set of prototype smart grid technologies and services and validates the economic viability of the proposed solution using cost–benefit analysis (CBA). The study considered the EU-funded project called RESOLVD and implemented the technologies and services in a real-life pilot. the technologies and services on the EU-funded H2020. The paper focuses on the analysis of technological solutions which enhance the operational efficiency and the hosting capacity of low-voltage electricity distribution grids. The solutions provided better integration of a hybrid battery storage system, with the grid interfacing power electronics, smart gateways for the interconnection of assets at the grid edge, and sensors enhancing infrastructure observability and control. The result from the CBA indicates the economic viability of the project, high scalability, and replicability. The economic benefits were realized with the breakeven value of eight secondary substations (SS) and 16 feeders. The scenario test on the DSO’s willingness to pay for the software as a service (SaaS) revealed that the payback period can further be reduced by almost half with a higher internal rate of return (IRR) and net present value (NPV). Both the CBA and scenario tests showed RESOLVD solution can become more economically viable when deployed in largescale. Moreover, the CBA results provide evidence to the energy policy by allowing DSOs to consider both CAPEX and OPEX for better investment decisions. Further, the paper proposes an alternative business approach that shifts from grid reinforcement to service provision. The paper also discusses the research implications on energy policy and business., Peer Reviewed, Objectius de Desenvolupament Sostenible::9 - Indústria, Innovació i Infraestructura, Objectius de Desenvolupament Sostenible::11 - Ciutats i Comunitats Sostenibles

The purpose of the paper is to introduce a new bi-directional approach to assess the gapbetween the customer needs and technology developers’ perception on the value propositions ofinnovations which includes storages. The paper used two methods; the first comprehensive senseand respond analysis investigated technology developers’ perceptions using the value propositionsdefined under the EU-funded H2020 RESOLVD project. The second method focused on customersand collected a survey which covered challenges, value propositions and preparedness to adopt newtechnology. The H2020 RESOLVD project has developed an intelligent low-voltage grid managementsystem with storage. The results from the sense and respond analysis showed that most of thevalue propositions aligned with the responses from the broader survey which are needed within fiveyears (e.g., improved power quality of grid, fault detection, reduced technical loss). However, thecybersecurity perception differed between developers and distribution system operators (DSOs). Thecustomer survey highlighted that certain value propositions of technological solutions are neededmore urgently than others, and therefore, technology developers should prioritize these in furtherdevelopments. Regarding the use of flexibility to manage the LV grid, unclear regulations wereexpressed as a key barrier, thereby affecting business feasibility around battery storage., Peer Reviewed

The integration of advanced measuring technologies in distribution systems allows distribution system operators to have better observability of dynamic and transient events. In this work, the applications of distribution grid measurement technologies are explored in detail. The main contributions of this review are (a) a comparison of eight advanced measurement devices for distribution networks, based on their technical characteristics, including reporting periods, measuring data, precision, and sample rate; (b) a review of the most recent applications of micro-Phasor Measurement Units, Smart Meters, and Power Quality Monitoring devices used in distribution systems, considering different novel methods applied for data analysis; and (c) an input-output table that relates measured quantities from micro-Phasor Measurement Units and Smart Meters needed for each specific application found in this extensive review. This paper aims to serve as an important guide for researches and engineers studying smart grids., Peer Reviewed

© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works, This paper proposes a triangular modulation with zero current switching (ZCS) for a hybrid Si-SiC isolated bidirectional DC-DC converter (IBDC). Three of the four legs in the IBDC operate at ZCS and use Si IGBTs, while the fourth operates at zero voltage switching (ZVS) and uses SiC MOSFET. In that case, the turn-off switching losses are concentrated regardless of the direction of the power. The main contribution of this paper resides in the proposed dead-band compensation mechanism. This dead-band compensation is crucial when addressing ZCS modulation and improves the overall efficiency of the full operating range. As a co-benefit, the proposed mix of semiconductor technologies can result in an effective cost reduction compared with a full SiC IBDC. The paper contains a detailed explanation of the implemented modulation applied to an IBDC. The paper contributes to deploy a theoretical implementation where the effect of parasitic capacitance on semiconductors during the dead-band is analytically considered. The presented method results are validated on a laboratory set-up using a 20 kW - 40 kHz hybrid Si-SiC IBDC.

The purpose of the paper is to introduce a new bi-directional approach to assess the gapbetween the customer needs and technology developers’ perception on the value propositions ofinnovations which includes storages. The paper used two methods; the first comprehensive senseand respond analysis investigated technology developers’ perceptions using the value propositionsdefined under the EU-funded H2020 RESOLVD project. The second method focused on customersand collected a survey which covered challenges, value propositions and preparedness to adopt newtechnology. The H2020 RESOLVD project has developed an intelligent low-voltage grid managementsystem with storage. The results from the sense and respond analysis showed that most of thevalue propositions aligned with the responses from the broader survey which are needed within fiveyears (e.g., improved power quality of grid, fault detection, reduced technical loss). However, thecybersecurity perception differed between developers and distribution system operators (DSOs). Thecustomer survey highlighted that certain value propositions of technological solutions are neededmore urgently than others, and therefore, technology developers should prioritize these in furtherdevelopments. Regarding the use of flexibility to manage the LV grid, unclear regulations wereexpressed as a key barrier, thereby affecting business feasibility around battery storage., Peer Reviewed, Postprint (published version)

Comunicació presentada a: 25th International Conference on Electricity Distribution: Madrid, 3-6 June 2019, The paper presents the RESOLVD (Renewable penetration
levered by efficient low voltage distribution grids) project,
which aims to improve the efficiency and the hosting
capacity of distribution networks in a context of highly
distributed renewable generation by introducing flexibility
(storage management) and control in the low voltage (LV)
grid. The analysis methodology - which follows the Smart
Grid Architecture Model (SGAM) framework paradigm- is
presented, along with the identified use cases and actors.
The proposed initial architecture is also presented, as
derived from the use case analysis process together with a
cybersecurity analysis of integration and interoperability
issues. The research is being motivated by business models
and the expected impacts are summarized in the paper, This work has been developed under the European project
RESOLVD of the Horizon 2020 research and innovation
program (topic LCE-01-2016-2017) and grant agreement N773715

This article presents a monitoring strategy based on multilayer principal component analysis (PCA) to detect and diagnose power system disturbances in large amounts of data collected by intelligent electronic devices in low voltage smart grids. The PCA models are built on multiple sliding windows, sized (in terms of length and sampling time) according to the type of phenomena to detect. Abnormalities are detected with use of two complementary statistical indexes, then diagnosed by computing the individual contributions of each monitored variable to the constraint violation of those statistics. As a result, its implementation enables an automatic analysis of multiple phenomena of interest in parallel over time using distinct electrical quantities. Furthermore, the method is demonstrated within the RESOLVD project with data from the OpenLV project containing measurements of active and reactive power gathered at different low voltage distribution substations, This work has been supported by the European Union’s
Horizon 2020 research and innovation framework under the auspices of the project Renewable penetration levered by Efficient Low Voltage
Distribution grids, grant agreement number 773715, and University of
Girona scholarship