Time Duration Prediction of Electrical Power Outages

Concerns exists regarding natural disasters, but what about the resulting power outages? This study investigates the characteristics of a digital visual narrative depicting the loss of electrical power after a natural disaster to identify how such situations are represented in images found on the internet. A qualitative approach with an exploratory scope was taken using digital methods. Six events in different places were selected, and 4691 images were analyzed using the Google Cloud Vision API. A constant comparison method was used to identify categories from these images. Then, a manual analysis was performed on a sample of the images of each event, and then categorized. It was found that more than half of the images refer to categories such as infrastructure, nature, and hazards, while the energy category was represented in 13.02% of the images. Most images were photographs; however, the non-photographic images found contained useful information regarding energy. Even when all events featuring power outages, few focused on the lack of energy and more on impacts to the infrastructure, despite energy being required for cities’ recovery.

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Application of Zone Selective Interlocking in Electrical Power Distribution System

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.b3622.129219 ◽

2019 ◽

Vol 9 (2) ◽

pp. 2294-2299

Keyword(s):

Power Distribution ◽

Distribution System ◽

Electrical Power ◽

Circuit Breaker ◽

Power Outages ◽

Power Distribution System ◽

Electrical Distribution ◽

Potential Damage

The two major concerns in today’s electrical distribution system are the potential damage from fault stress and the costs associated with power outages. The optimal way to limit fault stress is to clear the fault in the shortest amount of time. Unfortunately, clearing the fault within the shortest amount of time might sacrifice coordination and lead to broader power outages. Zone Selective Interlocking Coordination assures the possible sustaining of faults for over currents and voltages with different faults. The circuit breaker operation and principle depend upon the open and close operation for the continuity of supply/service. To reduce the stress on the system, generated energy during fault conditions to be considered and its coordination to be checked

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Four bits data sequence generators based ytterbium doped fiber amplifiers for upgrading maximum Q factor and minimum BER

Journal of Optical Communications ◽

10.1515/joc-2020-0051 ◽

2020 ◽

Vol 0 (0) ◽

Author(s):

Aadel M. Alatwi ◽

Ahmed Nabih Zaki Rashed ◽

IS Amiri

Keyword(s):

Electrical Power ◽

Optical Power ◽

Fiber Amplifiers ◽

Q Factor ◽

Data Sequence ◽

Time Duration ◽

Received Power ◽

Time Period ◽

Amplitude Level ◽

Period Duration

AbstractWe have simulated four bits data sequence generators based ytterbium-doped fiber amplifiers for upgrading max. Q factor and min. BER. Optical power variations against time duration after fiber cable length of 250 km with the bits sequence generators of 0101, 1000, and 1010 respectively are simulated. As well as the electrical power/total received power variations against frequency after photodetector receiver with the bits sequence generators of 0101, 1000, and 1010 respectively are discussed in details. Moreover, the signal power amplitude level with the time period duration after photodetector receiver/3R regenerator with the bits sequence generators of 0101, 1000, and 1010 respectively are clarified to show the max. Q factor and min. BER values for each case.

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Evaluation of the effects of electrical power outages on small and medium scale enterprises (SMEs)

World Journal of Advanced Engineering Technology and Sciences ◽

10.30574/wjaets.2021.3.2.0073 ◽

2021 ◽

Vol 3 (2) ◽

pp. 065-073

Author(s):

Frederick I. Olajide ◽

A. O. Ibe

Keyword(s):

Power Generation ◽

Power Supply ◽

Electrical Power ◽

Correlation Coefficients ◽

Negative Effects ◽

Power Outages ◽

Public Power ◽

Medium Scale ◽

Private Power ◽

Alternative Sources

This study evaluated the effects of electrical power outages on Small and Medium Scale Enterprises (SMEs). The study was guided by two specific objectives of determining the cost of alternative sources of power supply and its impact on the profitability of businesses of selected SMEs in Elelenwo community in Obio/Akpor Local Government of Rivers State and to suggest possible ways of reducing the power outages in Elelenwo Community. The costs of power supply using private power generation and that of public power generation from Port Harcourt Electricity Distribution (PHED) were collected from selected SMEs in the study area. Findings established the fact that electrical power outages have significant negative effects on the businesses of small and medium scale enterprises (SMEs) which in turns affect their profitability and sustainability. This was established by finding the correlations of the costs of running businesses with private power generation and that of using public power generation for selected SMEs and the results yielded negative correlation coefficients. The study also suggested possible ways of reducing the power outages.

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Transient Overvoltage Simulation in 500 kV Transmission Line Plan of Sarawak, Malaysia using PSCAD

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.d1458.029420 ◽

2020 ◽

Vol 9 (4) ◽

pp. 2481-2490

Keyword(s):

Transmission Line ◽

Transmission Lines ◽

Rapid Development ◽

Electrical Power ◽

Research Work ◽

Electrical Equipment ◽

Transmission System ◽

Time Duration ◽

Three Phase

Transmission system is a crucial system in electrical power since the system transmit the electricity from power generation to consumer load. According to World Bank, the power losses from transmission lines are rapidly increasing from year to year at the rate of 3.85% in the year of 2013 to 5.792% in 2014. Losses in transmission system are most likely from power quality problems such as transients. Transients are the outcome of high unexpected increment in voltage or current surge magnitudes. The peak values of both voltages and current are usually more than twice of that normal voltage and current amplitudes. The surges due to transients can vitally cause power system failure and breakdown of electrical equipment especially at the substations. There were few known transient overcurrent and overvoltage problems, which are due to faults, lightning and line energizing, respectively. This research work mainly focuses on simulating transients for 500 kV transmission system which employ Sarawak as the case study location. Sarawak currently has main 275 kV transmission line covering the whole Sarawak from Miri to Kuching known as Sarawak backbone, but due to lots of industries and rapid development and urbanization boom in Sarawak, there is a planned of 500 kV transmission line as a backup if the 275 kV transmission line proves inadequate. In Sarawak, the 500 kV is planned to be energized at 275 kV. But, in fact this work is for that transmission line to be operated at 500 kV, hence, monitoring the highest transient may occur. The results revealed that lightning and three-phase faults of 1.0 s fault time duration cause the highest change in amplitude of current on the line up to 9.06 pu and 9.27 pu, respectively. The highest lightning amplitude is observed when lightning was simulated at the receiving end of the line which is near to the Tada substation.

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The Power Usage Allocating System to Optimize Based on the Priority Load

MATEC Web of Conferences ◽

10.1051/matecconf/201821802005 ◽

2018 ◽

Vol 218 ◽

pp. 02005

Author(s):

N. Aidah Hartina ◽

Y. Trieksa Sekina ◽

Mohamad Ramdhani ◽

Ahmad Sugiana

Keyword(s):

Energy Consumption ◽

Electronic Devices ◽

Electrical Power ◽

Control Device ◽

Active Power ◽

Easy Access ◽

Power Outages ◽

Boarding House ◽

Current Measuring ◽

Excess Power

Monitoring energy consumption in a household is an essential thing for optimization of electrical power usage. Unnecessary or excessive power usage can lead to power outages and damage the electronic devices, so the end-user needs a control device to overcome it. In this paper, we propose an easy-access device that can provide real-time information about energy consumption and optimization of power consumption. The method for current measuring is used ZMCT103c whose works on some transformer and for voltage measuring is used ZMPT101b whose works on step down transformer. This system is focused on loads management priority in study case boarding house with total active power 900 watts which are created to scaled loads allocation based on electronic devices susceptible to damage that caused by power outages with assumption 2 (two) rooms and 3 (three) loads each room. The system has priority mechanism for load usage that could not be shut down such as PC (personal computer) and refrigerator. The device works by distributing maximum 55% of active power from excess power room to needed power room so that can avoid power outages and increase the efficiency of power usage.

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Changes in Ice Storm Impacts over Time: 1886–2000

Weather Climate and Society ◽

10.1175/2009wcas1013.1 ◽

2010 ◽

Vol 2 (1) ◽

pp. 23-35 ◽

Cited By ~ 17

Author(s):

David A. Call

Keyword(s):

Rural Areas ◽

Carbon Monoxide Poisoning ◽

Electrical Power ◽

Economic Losses ◽

Ice Storm ◽

Secondary Effects ◽

Negative Effects ◽

Power Outages ◽

Ice Storms ◽

Business Sectors

Abstract Ice storms have a variety of negative effects on society. Through an analysis of newspaper accounts of nine exceptional ice storms, the most widespread and longest lasting impact is the loss of electrical power. Power outages also cause secondary effects, such as carbon monoxide poisoning and fire, and they can force people to leave their homes because of a lack of heat. Other impacts of ice storms are transportation disruptions, school and business closings, and economic losses to agriculture and some business sectors. However, some businesses, such as those associated with the hospitality sector, actually benefit from ice storms. Modern power outages have a longer duration than those associated with earlier storms. Rural areas are most likely to suffer from long power outages because utilities prioritize areas with greater numbers of customers and because fallen trees may limit accessibility. Several suggestions for reducing electrical disruption, such as aggressive tree-trimming programs and burial of lines, are analyzed. While these may help, less reliance on electricity for lighting and heating systems could also provide a benefit.

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PREDIKSI DURASI BERBASIS EARNED SCHEDULE MENGGUNAKAN FAKTOR PENGARUH INTERNAL DAN EKSTERNAL SERTA VARIABEL DUMMY

JMTS: Jurnal Mitra Teknik Sipil ◽

10.24912/jmts.v3i2.6990 ◽

2020 ◽

Vol 3 (2) ◽

pp. 289

Author(s):

Graciella Graciella ◽

Basuki Anondho

Keyword(s):

Construction Project ◽

Influence Factors ◽

Total Duration ◽

Coefficient Of Determination ◽

External Influence ◽

Time Duration ◽

Dummy Variable ◽

Building Type ◽

Scheduled Time ◽

Duration Prediction

ABSTRACTThe success of a construction project could be seen based on whether the project has met the predetermined quality requirements, within a set budget and within the scheduled time duration. Time becomes one of the important aspects in planning a construction project because delay in the project can trigger various problems. Therefore, development of duration prediction technique could be a reliable option to increase prediction accuracy. The purpose of this study is to determine the relationship between the results of the duration estimation using earned schedule method with internal influence factors such as the number and gross floor area, external influence factors such as index of education, technology absorption, labor experience, technology availability, and innovation, and building type as dummy variable in predicting the total duration. The feasibility analysis showed that the equation of duration prediction using earned schedule method with internal and external influence factors as well as the dummy variable gave R2 value of 0.784 which means that the independent variables used could well explain the prediction of duration. There is an increase in the results of the coefficient of determination by 2.75% in the regression analysis using building type as dummy variable.ABSTRAKKeberhasilan suatu proyek konstruksi dapat dilihat berdasarkan ketepatan waktu yang telah dijadwalkan, ketepatan biaya yang telah dianggarkan, serta ketepatan mutu yang telah ditentukan sebelumnya. Waktu menjadi salah satu aspek penting dalam perencanaan suatu proyek konstruksi dikarenakan keterlambatan dalam proyek dapat memicu berbagai masalah baik dalam segi ekonomi maupun hukum, sehingga pengembangan suatu metode prediksi durasi dapat menjadi pilihan untuk meningkatkan akurasi prediksi. Tujuan dari penelitian ini adalah untuk mengetahui hubungan antara hasil prediksi durasi menggunakan metode Earned Schedule dengan faktor pengaruh internal berupa jumlah dan luas lantai, faktor pengaruh eksternal berupa indeks pendidikan, penyerapan teknologi, pengalaman tenaga kerja, ketersediaan teknologi, dan inovasi, serta variabel dummy berupa tipe bangunan dalam prediksi durasi total proyek pembangunan gedung bertingkat tinggi di Jakarta. Analisa dilakukan dengan menghitung estimasi durasi berdasarkan metode earned schedule yang menggunakan schedule performance index (SPI) dengan indikator waktu. Hasil analisa uji kelayakan regresi linier berganda menunjukkan bahwa persamaan prediksi durasi dengan faktor pengaruh internal dan eksternal serta variabel dummy memberikan nilai R2 sebesar 0.784 yang artinya variabel bebas yang digunakan dapat menjelaskan prediksi durasi dengan baik. Terdapat peningkatan hasil koefisien determinasi pada analisis regresi dengan menggunakan variabel dummy berupa tipe bangunan yaitu sebesar 2.75% dari nilai tanpa penggunaan variabel dummy.

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