| » Papers |
| The DEMOCRAT project team has published the following papers: |
| Venue: ISGT Europe 2019 – Bucharest, Romania, 29th September – 2nd October, 2019. |
| https://site.ieee.org/isgt-europe-2019/ |
| Paper: 420 |
| Title: Fault Analysis in a Microgrid Context: DEMOCRAT Project |
Abstract:
The development of energy storage systems and the transition to greener generation profiles, driven by global environmental concerns, have contributed to the transformation from traditional thermal generator–based microgrids to renewable energy–based systems. The main challenge of these solutions is to ensure flexibility, reliability and energy quality while providing ancillary services. This work presents the dynamic analysis of the behaviour of a microgrid (MG) integrating storage under different operational contexts and exposed to different fault scenarios. The proposed methodology allows to evaluate the contribution from Converter–Based Distributed Generation (CBDG) to fault currents in MGs, and the ability the system’s protections have to suppress them. Moreover, it focuses on the dynamic response of the Battery Energy Storage System (BESS) to different Short–Circuit (SC) faults. A MATLAB/Simulink simulation is developed, in order to model the connection of the MG envisioned in the DEMOCRAT project to the Low Voltage (LV) and Medium Voltage (MV) grids and its operation in isolated mode. |
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| Venue: CIRED 2019 - Madrid, Spain, 4-6 June 2019 |
| http://www.cired2019.org/ |
| Paper: 1186 |
Title: Adaptive Energy Resource Management System – scaling out microgrid based solutions
in electrical power systems |
Abstract:
The ever-growing deployment of Distributed Energy Resources (DER), typically from renewable energy sources such as PV generations across distribution networks and at the customer level as well, can potentially boost the transition towards more sustainable electrical grids and improve grids reliability, as the production of electricity becomes more redundant, i.e., spread across wide areas, rather than being centralized on the power supply system. However, besides the impacts of large DER deployment – such as reverse power flows, voltage rise, increased load profiles volatility thoroughly presented in the literature [1,2], it is typically deployed to be operated on grid connected mode, and thus it is not suitable for improving grids reliability during grid outages. On top of that, the nominal power of these assets is typically not dimensioned to supply all the nearby load, during contingency situations.
This paper presents therefore, an Adaptive Energy Resource Management System (AERMS) which, based upon on DER and energy storage systems, is capable of building an innovative micro-grid based solution that enables not only the on-grid and off-grid grid operation but also extends these functionalities by endowing the micro-grid with advanced management capabilities, in such a way it works as a flexible asset of distribution networks, by aggregating and coordinating their DER, flexible loads and other assets such as charging stations infrastructures for Electric Vehicles (VE) and street light circuits.
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| Venue: CIRED Workshop - Ljubljana, Slovenia, 7-8 June 2018 |
| www.cired2018-workshop.org |
| Paper: 0390 |
| Title: DEMOCRAT: Demonstrator of a micro-grid integrating storage |
Abstract:
The increasing integration of renewable energy sources in electrical systems along with the inclusion of recent technologies such as Electric Vehicles that require large amounts of energy from the grid in a short period of time lead to additional variability on consumption patterns and the network management becomes more challenging. A microgrid integrating Battery Energy Storage Systems (BESS) can contribute to mitigate these challenges, allowing a more flexible, efficient and reliable network operation. Therefore, and in order to meet the identified challenges, Efacec presents an innovative microgrid demonstration project: DEMOCRAT, with the integration of solutions and technologies in the field of Smart Grids and storage. |
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