Tools for Analysis and Design of Distributed Resources—Part II: Tools for Planning, Analysis and Design of Distribution Networks With Distributed Resources

2011 ◽  
Vol 26 (3) ◽  
pp. 1653-1662 ◽  
Author(s):  
J. A. Martinez ◽  
F. de Leon ◽  
A. Mehrizi-Sani ◽  
M. H. Nehrir ◽  
C. Wang ◽  
...  
Keyword(s):  
Distribution Networks ◽  
Distributed Resources ◽  
Analysis And Design

scholarly journals Smart Transformers as Active Interfaces Enabling the Provision of Power-Frequency Regulation Services from Distributed Resources in Hybrid AC/DC Grids

2020 ◽  
Vol 10 (4) ◽  
pp. 1434 ◽  
Author(s):  
Justino Rodrigues ◽  
Carlos Moreira ◽  
João Peças Lopes
Keyword(s):  
Storage System ◽  
Computational Simulation ◽  
Distribution Networks ◽  
Energy Storage System ◽  
Active Power ◽  
Frequency Regulation ◽  
Distributed Resources ◽  
Regulation Services ◽  
Power Frequency ◽  
Pv Generation

Smart Transformers (STs) are being envisioned as a key element for the controllability of distribution networks in a future context of Renewable Energy Source (RES), Energy Storage System (ESS) and Electric Vehicle (EV) massification. Additionally, STs enable the deployment of hybrid AC/DC networks, which offer important advantages in this context. In addition to offering further degrees of controllability, hybrid AC/DC networks are more suited to integrate DC resources such as DC loads, PV generation, ESS and EV chargers. The purpose of the work developed in this paper is to address the feasibility of exploiting STs to actively coordinate a fleet of resources existing in a hybrid AC/DC network supplied by the ST aiming to provide active power-frequency regulation services to the upstream AC grid. The feasibility of the ST to coordinate the resources available in the hybrid distribution AC/DC network in order to provide active power-frequency regulation services is demonstrated in this paper through computational simulation. It is demonstrated that the aforementioned goal can be achieved using droop-based controllers that can modulate controlled variables in the ST.

scholarly journals Power Quality Investigation of Distribution Networks Embedded Wind Turbines

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
A. Elsherif ◽  
T. Fetouh ◽  
H. Shaaban
Keyword(s):  
Power Systems ◽  
Wind Energy ◽  
Electric Power ◽  
Power Quality ◽  
Wind Turbines ◽  
Distribution System ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Small Scale ◽  
Distributed Resources

In recent years a multitude of events have created a new environment for the electric power infrastructure. The presence of small-scale generation near load spots is becoming common especially with the advent of renewable energy sources such as wind power energy. This type of generation is known as distributed generation (DG). The expansion of the distributed generators- (DGs-) based wind energy raises constraints on the distribution networks operation and power quality issues: voltage sag, voltage swell, voltage interruption, harmonic contents, flickering, frequency deviation, unbalance, and so forth. Consequently, the public distribution network conception and connection studies evolve in order to keep the distribution system operating in optimal conditions. In this paper, a comprehensive power quality investigation of a distribution system with embedded wind turbines has been carried out. This investigation is carried out in a comparison aspect between the conventional synchronous generators, as DGs are widely in use at present, and the different wind turbines technologies, which represent the foresightedness of the DGs. The obtained results are discussed with the IEC 61400-21 standard for testing and assessing power quality characteristics of grid-connected wind energy and the IEEE 1547-2003 standard for interconnecting distributed resources with electric power systems.

Tools for the Analysis and Design of Distributed Resources—Part III: Market Studies

2011 ◽  
Vol 26 (3) ◽  
pp. 1663-1670 ◽  
Author(s):  
A. J. Conejo ◽  
J. M. Morales ◽  
J. A. Martinez
Keyword(s):  
Distributed Resources ◽  
Analysis And Design

Tools for Analysis and Design of Distributed Resources—Part IV: Future Trends

2011 ◽  
Vol 26 (3) ◽  
pp. 1671-1680 ◽  
Author(s):  
J. A. Martinez ◽  
V. Dinavahi ◽  
M. H. Nehrir ◽  
X. Guillaud
Keyword(s):  
Future Trends ◽  
Distributed Resources ◽  
Analysis And Design

On the weaknesses and limitations of EPANET as regards energy

2015 ◽  
Vol 16 (2) ◽  
pp. 369-377 ◽  
Author(s):  
E. Gómez ◽  
E. Cabrera ◽  
J. Soriano ◽  
M. Balaguer
Keyword(s):  
Water Distribution ◽  
Distribution Networks ◽  
Pressurized Water ◽  
Analysis And Design ◽  
Cost Of Energy ◽  
Water Energy Nexus ◽  
Pressurized Irrigation ◽  
The One ◽  
The Cost ◽  
User Friendly

With more than 1,500 citations in ranked journals and hundreds of thousands of downloads, EPANET is the benchmark software for analysis and design of pressurized water distribution networks. User-friendly, powerful and reliable, its public domain use has spread throughout the world. However, from an energy standpoint its capacity is limited to the point at which, in certain circumstances it can supply erroneous results. This is understandable because on the one hand its main aim was to model water quality, and on the other hand, because it was conceived and developed towards the end of the last century before people started talking about the water–energy nexus. Increases in the cost of energy and the need to limit greenhouse gas emissions, however, have made energy efficiency a primary and inescapable objective. As the transport of pressurized water is a big consumer of energy, it seems convenient for EPANET users, particularly for those who applied this software to pressurized irrigation networks, to understand, as far as energy is concerned, its weaknesses and limitations which, in the end, is the aim of this paper.

scholarly journals Supply Restoration in Active Distribution Networks Based on Soft Open Points with Embedded DC Microgrids

Mathematics ◽  
2022 ◽  
Vol 10 (2) ◽  
pp. 211
Author(s):  
Irina I. Picioroaga ◽  
Andrei M. Tudose ◽  
Dorian O. Sidea ◽  
Constantin Bulac
Keyword(s):  
Power Systems ◽  
Critical Loads ◽  
Deterministic Model ◽  
Renewable Energy Sources ◽  
Distribution Networks ◽  
Distributed Resources ◽  
Dc Microgrids ◽  
Novel Technology ◽  
Optimal Coordination ◽  
Restoration Strategies

As disturbances due to natural disasters or man-made attacks intensify awareness regarding power systems’ resilience enhancement, the scientific community concentrates on exploring state-of-the-art technologies for emergency supply restoration strategies. Recent studies are increasingly focusing on the expanded flexibility of soft open points (SOPs) compared to conventional tie-switches to increase the restoration rate of critical loads; however, the potential of this novel technology is not limited to this aspect, with SOPs being used to improve the voltage level and increase the hosting capacity of renewable energy sources (RESs). This paper proposes a deterministic model for the optimal coordination of SOPs and distributed resources in an active distribution network (ADN) aiming at re-establishing the energy supply to critical loads after a prolonged interruption occurrence. At the same time, the support of DC microgrids with integrated RESs, embedded in SOPs, for the restoration process is explored. The efficiency of the proposed optimization model is verified based on a 24-h analysis performed on the modified IEEE 33-bus system, while considering the load and generation uncertainties as well.

scholarly journals Local flexibility market framework for grid support services to distribution networks

2021 ◽  
Author(s):  
Ioannis Bouloumpasis ◽  
Nima Mirzaei Alavijeh ◽  
David Steen ◽  
Anh Tuan Le
Keyword(s):  
Real Time ◽  
Distribution System ◽  
Distribution Networks ◽  
Distributed Resources ◽  
Local Networks ◽  
Holistic Management ◽  
Local Flexibility ◽  
Market Framework ◽  
Voltage Management

AbstractThe increasing volume of distributed resources and user-dependent loads in local networks has increased the concern for congestion and voltage management in distribution networks. To mitigate these issues, the implementation of local flexibility markets has been proposed to assist distribution system operators (DSOs) to manage their networks efficiently. This paper presents the framework of a local flexibility market, including the market participants and their roles. This framework aims to empower DSOs with a market-based instrument for the alleviation of congestion incidents by exploiting the flexibility of local resources. The proposed market aims to provide a tool for the holistic management of distribution networks by trading both reservation and activation of flexibility services, indifferent of the type and the timeline of the needed service. Three market modes are proposed, i.e., long-term, short-term and real-time market, and the interactions among those modes are shown. The operation of the market is explained in detail, including the identification of the needed services, the activation of the market as well as the proposed bidding, clearing and settlement mechanisms. The modelling of the long-term and real-time markets is also presented, along with some indicative simulation results for long-term and real-time services. Finally, the future developments as well as the major conclusions are discussed.

scholarly journals Robust sensor placement for leak location: analysis and design

2015 ◽  
Vol 18 (1) ◽  
pp. 136-148 ◽  
Author(s):  
Joaquim Blesa ◽  
Fatiha Nejjari ◽  
Ramon Sarrate
Keyword(s):  
Water Distribution ◽  
Sensor Placement ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Water Distribution Networks ◽  
Matrix Analysis ◽  
Sensitivity Matrix ◽  
Placement Problem ◽  
Analysis And Design ◽  
Leak Location

In this paper, a nominal sensor placement methodology for leak location in water distribution networks is presented. To reduce the size and the complexity of the optimization problem a clustering technique is combined with the nominal sensor placement methodology. Some of the pressure sensor placement methods for leak detection and location in water distribution networks are based on the pressure sensitivity matrix analysis. This matrix depends on the network demands, which are nondeterministic, and the leak magnitudes, that are unknown. The robustness of the nominal sensor placement methodology is investigated against the fault sensitivity matrix uncertainty. Providing upon the dependency of the leak location procedure on the network operating point, the nominal sensor placement problem is then reformulated as a multi-objective optimization for which Pareto optimal solutions are generated. The robustness study as well as the resulting robust sensor placement methodology are illustrated by means of a small academic network as well as a district metered area in the Barcelona water distribution network.

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