30 research outputs found
Development of Smart Grid Standards in View of Energy System Functionalities
A range of technologies must be developed and deployed for achieving a decarbonised energy system. A smart grid aims to integrate these different technologies into a single, over-arching system that is at the same time both complex and interoperable, which cannot be achieved without standardisation. Moreover, standardisation is a method of transferring research into successful processes and products. Without this, existing conventional energy systems will not change much longer, as it is more difficult to achieve significant market penetration of new technologies and deployment of new functions and applications. It seems that standardisation issues are not sufficiently addressed in scientific publications and are treated as a very specific topic by community of researchers despite the fact that standards may serve as a knowledge base for further research and improvement of emerging technologies and approaches. This paper presents a bird's-eye smart grid standardisation review based on a unique functionality - technology approach developed within Horizon 2020 project PANTERA.acceptedVersio
Photovoltaic grid-forming control strategy investigation using hardware-in-the-loop experiments
The frequency stability of a power system is of paramount importance, as a
fast frequency swings in the system can lead to oscillatory instability, and
thereby blackouts. A grid-connected microgrid, that can operate in the islanded
mode can also possess such deteriorating effect due to the higher share of
converter-based sources. In this paper, a coordinated frequency control within
a distribution network is discussed, with a higher share of Photovoltaics (PV).
The main objective of this paper is to test the grid-forming capabilities of
PVs, without the requirement of an energy storage in the network. The tests
were carried out with the help of the Typhoon Hardware-in-the-loop (HIL)
platform using a real Cypriot network feeder. The real-time results confirm the
efficacy of the PV as a grid-forming inverter, provided it has sufficient input
(irradiance) to provide for the loads within the system of interest. The
grid-forming PV also possesses the capability of reconnection with the utility
grid through a synchronizer switch that requires minimal communication, makes
the overall control independent of any other power source, subject to certain
irradiance and loading conditions.Comment: 13th Mediterranean Conference on Power Generation, Transmission,
Distribution and Energy Conversion (MEDPOWER 2022
Stability Studies for Photovoltaic Integration using Power Hardware-in-the-Loop Experiments
The electrical power network is gradually migrating from a centralized
generation approach to a decentralized generation with high shares of renewable
energy sources (RES). However, power systems with low shares of synchronous
generation and consequently low total system inertia, are vulnerable to power
imbalances. Such systems can experience frequency stability problems, such as
high frequency excursions and higher rates of change of frequency even under
small disturbances. This phenomenon is intensified when the grid under
investigation has low or no interconnections (islanded) and thus the challenge
for stable operation becomes more significant for the operators. This work
focuses on how the frequency stability is affected when a photovoltaic (PV)
inverter is integrated into a real non-interconnected distribution grid in
Cyprus. In order to capture the realistic interactions of this integration,
stability experiments in a hardware-in-the-loop (HIL) environment are performed
with the aim to provide insightful results for the grid operator.Comment: The 12th Mediterranean Conference on Power Generation, Transmission,
Distribution and Energy Conversion (MEDPOWER 2020
Photovoltaics merging with the active integrated grid:Grid integration white paper of the EU PV technology platform, working group on grid integration.
Quantification, challenges and outlook of PV integration in the power system: a review by the European PV Technology Platform
Smart Photovoltaic Energy Systems for a Sustainable Future
This book is the result of a concerted effort to shed scientific light on the timely theme of “Smart Photovoltaic Energy Systems for a Sustainable Future” [...
Design of a Smart Nanogrid for Increasing Energy Efficiency of Buildings
Distributed generation (DG) systems are growing in number, diversifying in driving technologies and providing substantial energy quantities in covering the energy needs of the interconnected system in an optimal way. This evolution of technologies is a response to the needs of the energy transition to a low carbon economy. A nanogrid is dependent on local resources through appropriate DG, confined within the boundaries of an energy domain not exceeding 100 kW of power. It can be a single building that is equipped with a local electricity generation to fulfil the building’s load consumption requirements, it is electrically interconnected with the external power system and it can optionally be equipped with a storage system. It is, however, mandatory that a nanogrid is equipped with a controller for optimisation of the production/consumption curves. This study presents design consideretions for nanogrids and the design of a nanogrid system consisting of a 40 kWp photovoltaic (PV) system and a 50 kWh battery energy storage system (BESS) managed via a central converter able to perform demand-side management (DSM). The implementation of the nanogrid aims at reducing the CO2 footprint of the confined domain and increase its self-sufficiency
Integration of Distributed Energy Generation in Energy Citizen side:Key Barriers and Enablers
Distributed energy generations (DEGs) form one of the main pillars enabling DER at the citizens and residential premises. Effective deployment of these resources has a key role in the energy transition's success. Compared to the other energy sector stakeholders, citizens have many specificities that need to be addressed. Analysing and meeting the needs and securing potential engagement in the energy transition is more complicated than dealing with organisations, companies or institutions. This paper thus very specifically analyse the DEG citizen empowerment barriers and main enablers. It examines main challenges and bottlenecks, identifies key enablers, reviews good practices and suggests actions to achieve a smooth and efficient energy transition.</p