Electrical Power Planning in SADC and the Role of the Southern African Power Pool

2016 ◽  
pp. 133-151
Author(s):  
Simon Krohn ◽  
Simbarashe Mangwengwende ◽  
Lawrence Musaba
Keyword(s):  
Electrical Power ◽  
Power Pool

Effect of size and shape of nanofillers on electrostatic and thermal behavior of epoxy-based composites

2021 ◽  
pp. 096739112110324
Author(s):  
Mihir N Velani ◽  
Ritesh R Patel
Keyword(s):  
Thermal Properties ◽  
Breakdown Strength ◽  
Electrical Power ◽  
Filler Loading ◽  
Filler Concentration ◽  
Computational Technique ◽  
Electrical Power System ◽  
Potential Applications ◽  
Different Shapes

The role of nanodielectrics in the electrical power system is becoming crucial owing to its superior properties and potential applications in the field. Yet, the materials face limited breakdown strength and thermal properties. Further, the nanodielectrics have not found a comprehensive commercial platform because of the costly manufacturing process, and characterization and testing facilities. Therefore, to reduce the involved cost, in this work, an FE (finite element) based computational technique has been implemented to visualize the effect of shape, size, and filler concentration under the application of high voltage (HV). The epoxy-based nanodielectrics have been modeled incorporating a range of different shapes and size nanofillers—Al2O3, BN, BeO, SiO2, and TiO2. The paper discusses the 2D-analysis of the modeled nanodielectric in the steady-state electrostatic fields and thermal domains. It shows the insights of the nanofillers’ choice to ensure a perfect blend of electrical and thermal properties. The epoxy with square-shaped BeO fillers showed a rise in the electric field of nearly 1.5 times than unfilled neat epoxy, which indicates a significant surge in thermal conductivity at specific filler loading.

The Effect of Nonlinear Piezoelectric Coupling on Vibration-Based Energy Harvesting

2008 ◽  
Author(s):  
Angela Triplett ◽  
D. Dane Quinn
Keyword(s):  
Energy Harvesting ◽  
Electrical Power ◽  
Original System ◽  
Constitutive Relationship ◽  
Ambient Vibration ◽  
Attractive Alternative ◽  
Maximum Output ◽  
Power Sources ◽  
Mechanical Coupling

Advances in electronic and consumer technology are increasing the need for smaller, more efficient energy sources. Thus vibration-based energy harvesting, the scavenging of energy from existing ambient vibration sources and its conversion to useful electrical power, is becoming an increasingly attractive alternative to traditional power sources such as batteries. Energy harvesting devices have been developed based on a number of electro-mechanical coupling mechanisms and their design must be optimized to produce the maximum output for given environmental conditions. While the role of nonlinearities in the components has been shown to be significant in terms of the overall device efficiency, few studies have systematically investigated their influence on the system performance. In this work the role of a nonlinear piezoelectric relationship is considered on the performance of a vibration-based energy harvester. Using a Poincare´-Lindstedt perturbation analysis the response of the harvesting system is approximated, including mechanical damping, stiffness nonlinearities, and the above mentioned nonlinear piezoelectric constitutive relationship. The predicted behavior is then compared against numerical simulations of the original system, focusing on the relationship between the power generated by the device, the ambient vibration characteristics, and the nonlinearities in the system.

scholarly journals Listrik dan Perubahan Sosial Pada Masyarakat Desa Terpencil Studi Kasus pada Masyarakat Dusun Punik, Kecamatan Batu Lanteh, Kabupaten Sumbawa

2020 ◽  
Vol 10 (2) ◽  
pp. 234
Author(s):  
Taufiq Ramdani
Keyword(s):  
Social Change ◽  
Rural Communities ◽  
Oral Tradition ◽  
Electrical Power ◽  
Indigenous Communities ◽  
Social Events ◽  
Gender And Age ◽  
The Family ◽  
Normative Criteria

Electricity has been a vital force of soclial change. Access to electricity is an inevitable drive to multidmentional transfromation of society. The purpose of this research is to describe the forms of social change that occurs in Punik remote rural communities as a result of the presence of diesel generating electrical power (generator) in 2005. Based on a qualitative conducte in Punik Village of Batu Lanteh Subdistrict of Sumbawa regency, this research found the following conclusions: (a) shifts in the layers of social status, which is based on the extent of the diversity of manifestations and clumps of technology that can have, how expensive, how far the complexity or level of sophistication, how people are able to do and have it , (b) changes in the distribution of roles in the family and society, where the role of the family and society to adapt following the relative availability of resources beyond the normative criteria, namely gender and age, (c) shifts in basis and the orientation of interaction and cooperation of the elements of intimacy that strengthen kinship and altruism shifted into affective neutrality, individual and economy-oriented interests, (d) shift in the tradition, includig a variety of oral tradition that includes the inauguration of the relationship between individuals that is reduced by functions clump technology innovation; other collective traditions are relatively easier stimulus delivered through the entertainment medi; (e) The change of culture, a culture which previously relied on a livelihood, the human role and traditional equipment based technologies manifestation are displaced by electrical function, (f) the changes social events to adapt with electrical availability.Keywords: Diffusion; Electricity; Generator; Innovations; Remote Indigenous Communities; Social Change.

scholarly journals The Role of Front-End AC/DC Converters in Hybrid AC/DC Smart Homes: Analysis and Experimental Validation

Electronics ◽  
2021 ◽  
Vol 10 (21) ◽  
pp. 2601
Author(s):  
Vitor Monteiro ◽  
Luis F. C. Monteiro ◽  
Francesco Lo Franco ◽  
Riccardo Mandrioli ◽  
Mattia Ricco ◽  
...  
Keyword(s):  
Smart Grids ◽  
Experimental Validation ◽  
Grid Point ◽  
Electrical Power ◽  
Smart Homes ◽  
Electric Mobility ◽  
Control Algorithms ◽  
New Paradigm ◽  
Front End

Electrical power grids are rapidly evolving into smart grids, with smart homes also making an important contribution to this. In fact, the well-known and emerging technologies of renewables, energy storage systems and electric mobility are each time more distributed throughout the power grid and included in smart homes. In such circumstances, since these technologies are natively operating in DC, it is predictable for a revolution in the electrical grid craving a convergence to DC grids. Nevertheless, traditional loads natively operating in AC will continue to be used, highlighting the importance of hybrid AC/DC grids. Considering this new paradigm, this paper has as main innovation points the proposed control algorithms regarding the role of front-end AC/DC converters in hybrid AC/DC smart homes, demonstrating their importance for providing unipolar or bipolar DC grids for interfacing native DC technologies, such as renewables and electric mobility, including concerns regarding the power quality from a smart grid point of view. Furthermore, the paper presents a clear description of the proposed control algorithms, aligned with distinct possibilities of complementary operation of front-end AC/DC converters in the perspective of smart homes framed within smart grids, e.g., enabling the control of smart homes in a coordinated way. The analysis and experimental results confirmed the suitability of the proposed innovative operation modes for hybrid AC/DC smart homes, based on two different AC/DC converters in the experimental validation.

The Electrification of Colonial Calcutta: Role of the Innovators, Bureaucrats and Foreign Business Organization, 1880–1940

2017 ◽  
Vol 34 (1) ◽  
pp. 48-76
Author(s):  
Suvobrata Sarkar
Keyword(s):  
Local Community ◽  
Electrical Power ◽  
Vital Role ◽  
Load Factor ◽  
British India ◽  
Important Place ◽  
Electrical Systems ◽  
Technological Advances ◽  
Politics And Culture

From as early as the 1880s until today, electrical power has served as a useful medium for ushering an urban industrial era throughout the world. This article examines the process of electrification in a colonial setting—Calcutta, the capital of British India till 1911. Access to electricity depended upon economics and technological advances, as well as a combination of local community and regional characteristics such as location, landscape, demographics, politics and culture. Western techno-scientific discourse occupied an extremely important place in the colonization of India. It is known that Western technology and ideas manipulated various technological projects in the colony, including electrification. Was there something unique about Calcutta and its plan that led to the electrification of a colonial metropolis almost simultaneously with other Western industrial nations? By the middle of the twentieth century, electricity, with its elaborate infrastructure of wires, generation stations and poles, emerged as the industrial era’s most prominent symbol of progress in Calcutta. The Calcutta Electric Supply Corporation Ltd (CESC), with its head office in London, played the most vital role, debating and resolving various technical questions, such as load factor, fuel sources, operating generation stations and electricity supply to industry, traction and population centres. This article, based on extensive archival research, shows how, despite colonial derivatives, the resulting electrical systems were locally initiated and customized to the needs and characteristics of the region.

scholarly journals Contribution of Regional Power Pools for Energy Security in Africa: Empirical Evidence from the Eastern and Southern African Regions

2021 ◽  
Vol 12 (6) ◽  
pp. 33
Author(s):  
Zerubabel G. Tefera ◽  
Maria Nzomo
Keyword(s):  
Energy Security ◽  
Eastern Africa ◽  
African Union ◽  
Regional Power ◽  
Linear Regression Models ◽  
Main Research ◽  
Power Pool ◽  
Energy Cooperation ◽  
Integration Project

Despite the considerable energy problem in Africa, it is not clear how the proliferation of regional power pool (RPPs), as the most feasible solution, address the problem by fostering energy cooperation. The main research objective was to analyse and compare the role of RPPs, particularly the Eastern and Southern African power pools (EAPP and SAPP), in fostering energy cooperation and addressing energy security in their respective sub-regions. The study employed a mixed research design. The study targeted 100 leaders and senior experts from the EAPP, SAPP, regional economic communities, financial institutions, scholars, the African Union (AU), and the United Nations. Qualitative data were analysed thematically, while quantitative data was analysed via descriptive and inferential analysis. Simple linear regression models were used to test the hypotheses. From the finding, in Eastern Africa, weak power pool arrangement, EAPP, has contributed significantly to the prevailing energy insecurity ( =.345, p<.05); on the other hand, strong regional power pool in Southern Africa, SAPP, significantly contributes to energy security ( =.323, p< .05), thus depicting that strong RPP is a key predictor of energy security in the region. Based on the findings, the study concludes that the institutionalised attempt to energy security in Africa can address most of Africa’s energy security challenges. However, Africa must embrace the role of these energy security institutions by pursuing a deliberate policy to strengthen them so that its overall integration project, as stipulated in the African Union Agenda 2063, can be materialised.   Received: 12 August 2021 / Accepted: 13 October 2021 / Published: 5 November 2021

scholarly journals The Role of Indonesian Constitutional Court In Protecting Energy Security

2016 ◽  
Vol 13 (2) ◽  
pp. 241
Author(s):  
Muhammad Siddiq Armia
Keyword(s):  
Significant Role ◽  
Energy Security ◽  
Electrical Power ◽  
Public Debate ◽  
Law Reform ◽  
Constitutional Court ◽  
Mineral Mining ◽  
Basic Norm ◽  
The Law

After more a decade, Indonesian Constitutional Court (ICC) has importantly played a significant role in the law reform, such  as  protecting  energy  security  through  their judgements. ICC comes out of the box, creating unpredictable judgements, and ensuring the justice values. In protecting energy security ICC makes important breakthrough with reviewing Act Number 22 of 2001 on the Oil and Earth Gas, Act Number 4 of 2009     on the Mineral Mining and Coal, and invaliding Act Number 20 of 2002 on the Electrical Power. Those acts contradict the basic norm in the 1945 Constitution. Although creating public debate, ICC judgment should be   appreciated.

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