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Renewable penetration levered by Efficient Low Voltage Distribution grids

Periodic Reporting for period 2 - RESOLVD (Renewable penetration levered by Efficient Low Voltage Distribution grids)

Reporting period: 2019-04-01 to 2021-03-31

RESOLVD is H2020 research and innovation action (LCE-01-2016-2017. Ref. 773715, Oct'17-March'21, https://resolvd.eu) coordinated by the Universitat de Girona and participated by other six partners: Joanneum Research (Research center, Austria), Smart Innovation Norway (Research center, Norway), Universitat Politècnica de Catalunya (Univ, Spain), Comsensus (SME, Slovenia), Intracom Telecom (Industry, Greece) and Estabanell Energia (SME/DSO, Spain) that aims to contribute to setting the next generation of competitive technologies and services for smart grids.
The overall objective of RESOLVD is to improve efficiency and the hosting capacity of distribution networks in a context of highly distributed renewable generation by introducing energy flexibility and control by acting on the grid through innovative advanced power electronics devices, with certain storage management capabilities, and increasing observability of low voltage distribution grids. Specific objectives include:
· Design, develop and test a new PMUs and power electronic device to operate the LV grid and provide flexibility through the integration of storage devices.
· Enhanced observability of LV grid with wide area monitoring capabilities and early detection of sudden variations in both demand and generation.
· Resilient and efficient operation of the LV grid, including optimal configuration based on demand and generation forecasting and providing self-healing capabilities.
· Propose and analyse potential and barriers of new business models.
The proposal extends until the integration of software services and instrumentation (PMUs, power electronics, etc.) in a data analytics infrastructure, at the same time that assures interoperability with DSO legacy systems (i.e. SCADA. AMI/MDMS, etc.) for an enhanced energy management of low voltage grids.
The execution pf RESOLVD has been split in 9 work packages: WP1(use case and requirement analysis), WP2 (power electronics technologies), WP3 (observability: components and technologies), WP4 (integration and data platform), WP5 (integration and validation -not started-), WP6 (business models and exploitation), WP7(dissemination and communication), WP8 (management) and WP9 (ethics). During the first 18 months the efforts focused on the consolidation of the overall project specifications and starting the development of individual components accordingly. Second term extended until month 42, and continued with the individual validation of software and hardware components and their further integration in the RESOLVD platform, deployment in the pilot site and validation in the real environment.

Thus, WP2 has focused on the construction and validation in the laboratory of the power electronics device, its integration with heterogeneous groups of batteries and the development of power sharing algorithms to optimally manage them. WP3 included activities to improve grid observability and management strategies: test and validation of algorithms for energy (demand and generation) forecasting, fault detection and isolation and grid operation scheduling and the implementation of the corresponding APIs, ready for integration. Also in WP3, three hardware developments were completed: synchrophasors –PMUs-, power quality monitors –PQMs- and associated gateways -GW-. Integration off these HW and SW components and modules previously described, together with legacy system in a single platform under the Enterprise Service Bus (ESB) paradigm and managing the corresponding data flows was the focus of WP4. Piloting, test and validation was the focus of WP5. It started with the definition of test scenarios and selection of KIPis accordingly; followed by conditioning the pilot site and finally deploy and execute the validation tests accordingly.

The tests performed in the pilot demonstrated the capability of RESOLVD solutions to improve the voltage profile in LV grids in 1.7% by injecting power to correct voltage variations due to variations on generation and demand. Also the use of batteries in the pilot allowed a reduction of 9% of transport losses due to a reduction of exchanged energy at substation level together with a peak reduction of 18-19% in the daily demand profile. Versatility of the power electronic device was demonstrated in the improvement of power quality (phase compensation, harmonic reduction) resulting also a reduction of transport losses estimated in 166.7W/Ohm.

Apart from research and technical activities, the developments have been accompanied of a very intense work in WP6 that result in a set of individual Key Exploitable Results derived from technological developments (Power Electronics Device managing heterogeneous batteries, Phasor Measurement Unit (PMU) & Edge Computing, Power Quality Monitor And Smart Gateway, Enterprise Service Bus (ESB) and Data Management Platform, Cybersecurity Methodology, RESOLVD LV Decision Support Toolkit (LVD-DST)) that can be combined in several packages to satisfy multiple DSO necessities. For them, associated business models and exploitation plans have been developed.

Results from all these activities have been reported in multiple communication and dissemination actions within WP7 with a great involvement and commitment of all the partners, resulting in 18 conference papers and 6 journal papers (plus other 7 under review/preparation) and many networking, demo and survey activities.
RESOLVD supposes a step ahead towards LV smart grids, capable of integrating a large share of renewables, with the integration of RES and increasing its hosting capacity by introducing local energy balancing supported by grid storage management and grid scheduling. This is possible through the integration of HW nad SW technologies with DSO legacy systems (SCADA; AMI/MDMS) to extend the operational ana management capabilities of the grid close to the demand and distributed generation. A Key Exploitable Results derived from technological developments have been validated: Power Electronics Device managing heterogeneous batteries, Phasor Measurement Unit (PMU) for MV/LV monitoring & Edge Computing, Power Quality Monitor And Smart Gateway, Integration and interoperability through an Enterprise Service Bus (ESB) and Data Management Platform, Cybersecurity Methodology and a LV Decision Support Toolkit (LVD-DST)) that can be combined in several packages to satisfy multiple DSO necessities and operational requirements. Some of the operational capabilities that RESOLVD offers include the operation of storage and grid configuration to avoid congestion, peak reduction, voltage compensation, power quality improvement and local energy management. RESOLVD expects to impact in the development of LV smart grid concept with this set of enabling technologies for the energy transitions, aligned with EU policies and roadmaps, tested and validated in a real environment.
A complete analysis of regulation and implications of RESOLVD have been summarised in a white paper, publicly available, included in D7.6 and disseminated in several forums. Achievements are aligned with the EU goal of integrating a share of renewables in the power network exceeding 50% by 2030 and subsequent objectives, by providing tools and methods to manage local RES by scheduling storage deployed near the generation, reducing evacuation problems, improving the local consumption of local RES and reducing congestions.
Business model development methodology
PMU device
Dual active bridge modules
UI-ESB-Schedule user interface
Three phase h-bridge ac-dc power module
Decision Support toolkit: FDA Module 2
Decision Support toolkit: Forecasting Module 2
Complete PED cabinet
Decision Support toolkit: Forecasting Module 1
RESOLVD Security thread model
Overall RESOLVD architecture
Board integrating protection relays and measurement devices for the different subsystems of the PED
Decision Support toolkit: FDA Module
RESOLVD General Vision
Board integrated in one of the two bridges composing the dual active bridge modu