scholarly journals Transient Analysis of Electric Energy Distribution Systems with Distributed Generators during Contingencies

2019 ◽  
Vol 17 ◽  
pp. 483-488
Author(s):  
Wandry Rodrigues Faria ◽  
◽  
Marcelo Escobar de Oliveira ◽  
Jonas Villela de Souza ◽  
Luis Gustavo Wesz da Silva ◽  
...  
Keyword(s):  
Energy Distribution ◽  
Transient Analysis ◽  
Distribution Systems ◽  
Electric Energy ◽  
Distributed Generators

scholarly journals Electric systems failures produced by CG lightning in Eastern Amazonia

2014 ◽  
Vol 29 (spe) ◽  
pp. 31-40 ◽  
Author(s):  
Ana Paula Paes dos Santos ◽  
José Ricardo Santos de Souza ◽  
Everaldo Barreiros de Souza ◽  
Alexandre de Melo Casseb do Carmo ◽  
Wanda Maria do Nascimento Ribeiro
Keyword(s):  
Energy Distribution ◽  
Transmission Lines ◽  
Distribution Systems ◽  
Electric Energy ◽  
Electricity Distribution ◽  
Power Outages ◽  
Lightning Strikes ◽  
Area Of Interest ◽  
The Pacific ◽  
Cg Lightning

Operational records of power outages of the electric energy distribution systems in eastern Amazonia presented a large number of events attributed to lightning strikes, during the 2006 to 2009 period. The regional electricity concessionary data were compared to actual lightning observations made by SIPAM's LDN system, over two areas where operational sub systems of transmission lines are installed. Statistical relations were drawn between the monthly lightning occurrence density and the number of power outages of the electric systems for both areas studied. The results showed that, although with some delays between these variables peaks, the number of power disruptions has a tendency to follow the behavior of the lightning occurrence densities variations. The numerical correlations were positive and may be useful to the transmission lines maintenance crews at least for the Belém-Castanhal electricity distribution sub system. Evidence was found, that the SST's over certain areas of the Pacific and Atlantic Oceans, influence convection over the area of interest, and may help to prognosticate the periods of intense electric storms, requiring repair readiness for the regional electric systems.

scholarly journals Study of Volt/VAr control applied to future electrical energy distribution systems

2019 ◽  
Author(s):  
Guilherme de Oliveira Custodio ◽  
Fernanda Caseño Trindade Arioli
Keyword(s):  
Energy Distribution ◽  
Power Control ◽  
Distribution Systems ◽  
Reactive Power ◽  
Electrical Energy ◽  
Photovoltaic Systems ◽  
Reactive Power Control ◽  
Control Functions ◽  
Distributed Generators ◽  
Control Scheme

Recently, several approaches have been proposed to mitigate the technical impacts caused by distributed generators in electrical energy distribution systems. Among these approaches one can detach the control scheme known as Volt/VAr, a centralized scheme that integrates voltage and reactive power control functions. In this context, this work aims to study the Volt/VAr control solved by an optimization tool, and focused on distribution systems with a high monitoring level and a massive integration of photovoltaic systems.

A Conceptual Model for Mitigating Security Vulnerabilities in IoT-Based Smart Grid Electric Energy Distribution Systems

2021 ◽  
Vol 55 ◽  
pp. 122-131
Author(s):  
Hassan Jimoh Onawola ◽  
Olumide Babatope Longe ◽  
Garba Aliyu ◽  
Bukhari Badamasi
Keyword(s):  
Smart Grid ◽  
Energy Distribution ◽  
Conceptual Model ◽  
Distribution Systems ◽  
Electric Energy ◽  
Cyber Attacks ◽  
Cyber Attack ◽  
Grid Infrastructure ◽  
Security Vulnerabilities ◽  
Systems Research

Smart Grid (SG) systems involves large Information Communication Technology (ICT) infrastructure integrated with the power grid system to allow bidirectional flows of information, for effectiveness and to provide economic and sustainable processes that facilitates constant electricity supplies. As a result of open IoT used in smart grid infrastructure, electricity generation and distribution information are getting more vulnerable to online threats. The need to find effective and mitigating measures to the vulnerability and threats in the systems. As broadband network moves from 4G to 5G networks with its attendant advantages, smart grid interoperability will require a well-structured security strategy to avert cyber-attacks and ensure grid security. Cyber-attack issues are critical factors that need to be understood and mitigating techniques developed to ensure the smooth running of smart grid systems. Research has shown that severe vulnerabilities in the implementation of the smart meter pose a threat to grid infrastructure, as such, it is only when these issues are resolved that we can have a sustainable and realistic smart grid technology. This study addressed these concerns by developing a conceptual model for the mitigation of security vulnerabilities in IoT-based smart grid electric energy distribution systems.

Investigation of solutions to the problem of voltage sags in electric energy distribution systems

2018 ◽  
Author(s):  
Felipe Bayma B. Rolim ◽  
Fernanda C. L. Trindade ◽  
Dirceu Jose Ferreira ◽  
Camilla Pereira Nakanami
Keyword(s):  
Energy Distribution ◽  
Distribution Systems ◽  
Electric Energy ◽  
Voltage Sags

scholarly journals Real Fault Section Estimation in Electrical Distribution Networks Based on the Fault Frequency Component Analysis

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1145 ◽  
Author(s):  
Ehsan Gord ◽  
Rahman Dashti ◽  
Mojtaba Najafi ◽  
Hamid Reza Shaker
Keyword(s):  
Energy Distribution ◽  
Distribution Systems ◽  
Fault Location ◽  
Electric Energy ◽  
Transient State ◽  
Electrical Energy ◽  
Distribution Networks ◽  
Component Analysis ◽  
Frequency Component ◽  
Network Simulator

: Fault location in electrical energy distribution networks is an important task, as faults in distribution grids are among the main causes of electricity supply disruption. Fault location in the distribution systems, however, is a challenging task because of the topology of the distribution networks, as well as the main and side branches. Therefore, it is necessary to address these challenges through an intelligent approach to fault location. In this paper, fault location in electric energy distribution networks is addressed considering the changes in fault distance and fault resistance in the presence of different fault types. A new method for fault location is developed for conditions where the minimum information is available and only information at the beginning of the feeder is used. This facilitates wide adoption of the technique as it does not require significant investments in instrumentation and measurement. The proposed intelligent method is based on the impedance and transient state estimation. This technique employs a specific impedance analysis for determining possible fault locations considering the unbalanced performance of distribution systems, distances, and different fault resistances. To determine the real faulty section, real fault frequency component analysis and the simulated faults at possible fault locations are used. At this stage of the process, it is possible to eliminate multiple estimations with the help of comparison and identification of the similarities. Therefore, a real faulty section is determined. It is observed that some conditions of electric energy distribution networks affect the accuracy and performance of the proposed method significantly; thus, a detailed investigation is conducted to neutralize these conditions. Simulation results and calculations based on MATLAB along with a practical test of the proposed method in power network simulator confirm a satisfactory performance.

A Target Voltage Control Method for Distribution Systems based on Nodal P&Q Prices for PV Distributed Generators

2020 ◽  
Vol 140 (6) ◽  
pp. 456-464
Author(s):  
Naoto Yorino ◽  
Tsubasa Watakabe ◽  
Ahmed Bedawy Khalifa ◽  
Yutaka Sasaki ◽  
Yoshifumi Zoka
Keyword(s):  
Distribution Systems ◽  
Control Method ◽  
Voltage Control ◽  
Distributed Generators
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