The Impact of Underground Cables on Power Transmission and Distribution Networks

2006 ◽  
Author(s):  
H. Al-Khalidi ◽  
A. Kalam
Keyword(s):  
Power Transmission ◽  
Distribution Networks ◽  
Underground Cables ◽  
The Impact ◽  
Transmission And Distribution

A Novel FACTS Based (DDSC) Compensator for Power-Quality Enhancement of L.V. Distribution Feeder with a Dispersed Wind Generator

2006 ◽  
Vol 7 (3) ◽  
Author(s):  
Adel M Sharaf ◽  
Khaled Mohamed Abo-Al-Ez
Keyword(s):  
Power Quality ◽  
Distributed Generation ◽  
Distribution System ◽  
Power Transmission ◽  
Traditional Approach ◽  
Distribution Networks ◽  
System Capacity ◽  
Quality Enhancement ◽  
Wind Generator ◽  
Transmission And Distribution

In a deregulated electric service environment, an effective electric transmission and distribution networks are vital to the competitive environment of reliable electric service. Power quality (PQ) is an item of steadily increasing concern in power transmission and distribution. The traditional approach to overcoming capacity and quality limitations in power transmission and distribution in many cases is the addition of new transmission and/or generating capacity. This, however, may not be practicable or desirable in the real case, for many of reasons. From technical, economical and environmental points of view, there are two important - and most of the time combined - alternatives for building new transmission or distribution networks to enhance the transmission system capacity, and power quality: the Flexible alternating current transmission devices and controllers, and the distributed generation resources near the load centers. The connection of distributed generation to the distribution grid may influence the stability of the power system, i.e. angle, frequency and voltage stability. It might also have an impact on the protection selectivity, and the frequency and voltage control in the system. This paper presents a low cost FACTS based Dynamic Distribution System Compensator (DDSC) scheme for voltage stabilization and power transfer and quality enhancement of the distribution feeders connected to a dispersed wind generator, using MATLAB/ SimPower System simulation tool.

Bio-Inspired Modeling Approaches for Human Networks With Link Dissipation

2019 ◽  
Author(s):  
Varuneswara Panyam ◽  
Astrid Layton
Keyword(s):  
Transmission Lines ◽  
Water Distribution ◽  
Energy Transport ◽  
Power Transmission ◽  
Ecosystem Model ◽  
Distribution Networks ◽  
Power Grids ◽  
Power Transmission Lines ◽  
The Impact ◽  
Human Networks

Abstract Structural similarities between human networks and biological ecosystems have inspired biomimetic design of human networks. The approach requires the networks to be represented as graphs, where the actors are nodes and the connections between actors are links. A major oversight in the application of ecosystem-based modeling to human networks thus far has been in the selection of actors and links. Transfers between species in a biological ecosystem are direct, happening when the species are co-located. Human networks often require a physical aid to complete the transaction, such as power transmission lines, pipelines, or vehicles. These exchange methods experience dissipation, which is not captured in current applications of ecosystem-based human network modeling. Human networks modeled as ecosystems thus far simply categorize exchanges as links in the graph, effectively forcing dissipation during material/energy transport to be neglected. This dissipation can sometimes be high relative to the total energy/material exchanged and thus is a potentially large oversight. Three hypothetical power grids and three Italian urban water distribution networks are used to quantify the impact of modeling interaction aids — power lines and water pipelines — as actors (and thus including any dissipation) in an ecosystem model. Ecological structural and flow metrics previously applied to human networks are evaluated between the two modeling methods. The comparison shows that the impact of this overlooked aspect is potentially significant and warrants consideration.

scholarly journals Influence of Composition of Power Plant Fleets and Ownership of Transmission and Distribution Networks to Incumbent Company’s Business Success in Some Former Socialist EU Countries

2021 ◽  
Vol 70 (1) ◽  
pp. 29-35
Author(s):  
Krešimir Komljenovic
Keyword(s):  
Power Plants ◽  
Social Issues ◽  
Distribution Networks ◽  
Business Success ◽  
Open Market ◽  
Secondary Sources ◽  
Renewable Power ◽  
Access To Data ◽  
The Impact ◽  
Transmission And Distribution

By joining the EU, companies from eastern countries, which until then had largely operated in regulated circumstances, had to adapt to the open market. Liberalization and deregulation were imposed on them as new mantras, in contrast to ensuring the supply at all costs and addressing social issues. How these companies flourished in new circumstances is a legitimate topic for managerial research. This article researches the impact of the "hard assets" composition, that those companies operated, on their expected business success after a multi-year adjustment period. Positivistic research philosophy, "case study", and the deduction approach are used. The data were collected mainly from secondary sources. 3 research goals were selected with 3 relevant research questions. An attempt was made to respond to them on the example of 7 Central European countries and 11 companies, direct successors of original incumbents. The property is grouped into 3 groups: classical power plants (nuclear, hydro, coal), renewable power plants (wind, solar, bio mass) and lines (transmission and distribution). Criteria for success are selected according to usual praxis, but also adjusted to accessible data, predominantly from the company's annual financial statements. Contrary to the developed intuition, and based on cases of companies analyzed, there was no significant correlation between the selected criteria of success and the observed asset classes, serving as independent variables. The biggest problem in the research was access to data. This paper is an extraction from an MBA dissertation.

scholarly journals Performance Investigation of a Silicon Photovoltaic Module under the Influence of a Magnetic Field

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Dioari Ulrich Combari ◽  
Emmanuel Wendsongré Ramde ◽  
Idrissa Sourabie ◽  
Martial Zoungrana ◽  
Issa Zerbo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Power Transmission ◽  
Photovoltaic Module ◽  
Electrical Parameters ◽  
Solar Module ◽  
Current Voltage ◽  
Power Point ◽  
The Impact ◽  
Transmission And Distribution ◽  
The Magnetic Field

Aside from the terrestrial magnetic field that is generated from the earth core, power transmission, and distribution lines, transformers and other equipment do produce a certain amount of magnetic field that could interfere with the performance of photovoltaic modules. This study conducted an experiment and investigated the performance of a silicon photovoltaic module subjected to a magnetic field. The current-voltage and power-voltage characteristics were plotted in the same axis system and allowed us to find, as a function of the magnetic field, the electrical parameters of the photovoltaic module such as maximum electric power, fill factor, conversion efficiency, and charge resistance at the maximum power point. These electrical parameters were then used to calculate the series and shunt resistances of the equivalent circuit of the photovoltaic module. The results have shown that the efficiency of a solar module is affected by the presence of magnetic fields. However, the magnitude of ambient magnetic field generated by power transmissions lines and other equipment is extremely low (in the order of 10−2 mT or less) as compared to the values of the magnetic field used in this study. That made it difficult to conclude as to the impact of such field on solar photovoltaic installations.

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