Simplified distribution grid model for power quality studies in the presence of photovoltaic generators

Patsalides, Minas; Efthymiou, Venizelos; Stavrou, Andréas; Georghiou, George E.

doi:10.1049/iet-rpg.2014.0231

Cited by 17 publications

(11 citation statements)

References 53 publications

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“…Some of them do not use machine learning. Patsalides et al presented a simplified distribution grid model (SDGM) to investigate voltage variation and PV capacity in a distribution grid (Patsalides et al 2015). The SDGM makes use of Thevenin equivalent circuits (TEC), which consist of a voltage source and impedance according to Thevenin's theorem (Brittain 1990).…”

Section: Applications Of Surrogate Models In the Energy Domainmentioning

confidence: 99%

Towards domain-specific surrogate models for smart grid co-simulation

2019

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Surrogate models are used to reduce the computational effort required to simulate complex systems. The power grid can be considered as such a complex system with a large number of interdependent inputs. With artificial neural networks and deep learning, it is possible to build high-dimensional approximation models. However, a large data set is also required for the training process. This paper presents an approach to sample input data and create a deep learning surrogate model for a low voltage grid. Challenges are discussed and the model is evaluated under different conditions. The results show that the model performs well from a machine learning point of view, but has domain-specific weaknesses.

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Section: Applications Of Surrogate Models In the Energy Domainmentioning

confidence: 99%

Towards domain-specific surrogate models for smart grid co-simulation

2019

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“…Depending on the grid configuration and the type of RES, different power quality problems may arise [17,18]. Steady state simulations of electricity networks help in analysing the system performance under the different conditions.…”

Section: A Model Verficationmentioning

confidence: 99%

The impact of simulation studies on the distribution grid operation and planning in Cyprus

Armenakis

Stasopoulos

Kaskiris

et al. 2016

2016 18th Mediterranean Electrotechnical Conference (MELECON)

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Simulation tools offer a wide range of prospective advantages that give utilities and system operators the ability to improve power quality and operational costs. The use of such tools can make the analysis/study of complex power networks simpler, giving valuable answers about the power quality behaviour of electricity networks in the presence of intermittent renewable energy generation and can help in reducing undesirable energy losses. In this work, steady-state simulations are performed by undertaking measurement investigations and model development in order to assess the impact of such studies on system planning and operation. By using DigSILENT PowerFactory, typical feeders of Nicosia district, Cyprus are realized into circuit form and simulated while considering demand and renewable energy production time series measurement data. The aim of the paper is to reveal the operational benefit of using design and analysis tools for proactive or corrective actions. From the simulations, it has been shown that network reconfiguration tasks lead to the reduction of power losses which can inevitably create an economic benefit for electricity utilities. In addition, simulation tools can help utilities meet challenging voltage regulation requirements/issues. One example of eliminating voltage violations through transformer tap optimization is also provided.

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“…Again, another known issue is the reduced system inertia that happens when high PV power is injected into the line [8]. Since other specific problems (e.g., presence of time-varying loads, not dispatchable energy sources, not optimized allocation of energy sources because of the previous combined effects) that are directly related to grid-connected RES can affect the operation of the grid, in the last years the attention of the researchers has been posed on the grid integration of the PV systems [9][10][11][12][13], wind plant [14], and so on.…”

Section: Introductionmentioning

confidence: 99%

Phase Coherence Index, HHT and Wavelet Analysis to Extract Features from Active and Passive Distribution Networks

Vergura¹,

Carpentieri²

2018

Applied Sciences

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The modern Power Distribution Systems (PDS) operate more and more often with distributed generators and the optimal operation of the utility distribution systems has to take into account the possibility of bi-directional energy flows, although this event may only occur for some of the PDS. For this reason, the analysis methods that are usually employed to investigate the electrical behavior of the PDS can be more or less effective, depending on the typology of electrical loads connected to the line and on the presence or absence of Renewable Energy Sources (RES). This paper proposes either a methodology to select the best performing mathematical tool to investigate the electrical behavior of the PDS-depending on their linearity and stationarity-either an index to discriminate the PDS on the basis of a different amount of PV penetration. The proposed approach is applied to three real cases of PDS with different characteristics: residential and commercial, in the presence or absence of PV plants. In addition, two indices that are able to characterize the PDS in terms of periodicity and disturbance of the electrical signal are considered, specifically the phase coherence between two arbitrary signals and the phase coherence between an arbitrary signal and a reference one. The combined use of these indices can give valuable information about the degree of non-linearity and can be a measure of the PV penetration in a distribution circuit.

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Simplified distribution grid model for power quality studies in the presence of photovoltaic generators

Cited by 17 publications

References 53 publications

Towards domain-specific surrogate models for smart grid co-simulation

Towards domain-specific surrogate models for smart grid co-simulation

The impact of simulation studies on the distribution grid operation and planning in Cyprus

Phase Coherence Index, HHT and Wavelet Analysis to Extract Features from Active and Passive Distribution Networks

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