Predicting Reliability of Electric Power Distribution Grid Using Historical Outage Data
Erwin Normanyo,
Godwin Diamenu
Issue:
Volume 11, Issue 4, July 2022
Pages:
66-78
Received:
22 October 2021
Accepted:
25 January 2022
Published:
29 July 2022
DOI:
10.11648/j.epes.20221104.11
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Abstract: Demand for energy is on the increase posing serious complexity issues to power systems in general impacting reliability negatively. The electric power distribution grid is one of the most important entities in a power system contributing up to 90% of reliability problems. Reliability of the electric service provided to end users or load points can be altered by the faults originated either inside or outside of the functional zones of an electric power distribution grid. Reliability analyses of electric power systems in general is based on historical analysis approach where the historical outage data is used to assess the reliability performance of the generation, transmission or the distribution component of the power system. This approach even though gives the appropriate reliability indices indicating the performance of the electric power system component under consideration; however, the computed reliability indices are usually historic making any improvement decision(s) taken to be reactive. In this research article, the historical outage data is rather used to predict the performance of the electric power distribution grid into its future operations and maintenance activities. Analysis of predictive reliability (PR) normally helps in determining the performance state that the design, planning, and operation of the grid will attain when certain reliability objectives and associated performance outcomes are met. The PR is conducted by computing reliability indices using present fault rates, outage durations and number of affected customers. The predicted SAIFI, SAIDI, CAIDI, CAIFI and ASAI values of the years 2020, 2025, and 2030 gave an indication that the reliability of the electric power distribution grid within the metropolis would see varying monthly but improved yearly performances. Better performances regarding these indices are envisaged as the years advance towards the year 2030.
Abstract: Demand for energy is on the increase posing serious complexity issues to power systems in general impacting reliability negatively. The electric power distribution grid is one of the most important entities in a power system contributing up to 90% of reliability problems. Reliability of the electric service provided to end users or load points can ...
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Voltage Profile Analysis of 132kV Transmission Line Using Powerworld Simulator: A Case Study of JUJA-RABAI Line
Joel Mwithui Kitheka,
Peter Musau Moses,
Abraham Mutunga Nyete,
Nicodemus Odero Abungu
Issue:
Volume 11, Issue 4, July 2022
Pages:
79-86
Received:
7 July 2022
Accepted:
1 August 2022
Published:
9 August 2022
DOI:
10.11648/j.epes.20221104.12
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Abstract: The growing power demand has made the government of Kenya to increase it’s financial budget to address the issue of transmission and distribution of power. The increasing set up of distribution sub-stations both in urban and rural areas has called for immediate investigation to find out whether the existing transmission lines are capable of handling the load demand without voltage collapse. This paper presents a study to analyze the current voltage profile of Juja-Rabai 132kv transmission lines before new sub-stations are set up to address the growing power demand. The network load flow analysis was carried out using Decoupled load flow analysis method and powerworld software which uses Newton Raphson method. In this study bus voltages of each substation were computed by forming Jacobian matrices. The power flow calculations was used to validate the simulated data. The voltage profile calculations resulted to a flat voltage profile while the simulated results showed violation of voltage profile from Voi Substation to Rabai substation. This violation was corrected using a shunt compensator in Voi substation. This paper revealed that more substations can be terminated in Juja – Rabai 132 kV transmission line to address the existing power demand without voltage violation in the power network.
Abstract: The growing power demand has made the government of Kenya to increase it’s financial budget to address the issue of transmission and distribution of power. The increasing set up of distribution sub-stations both in urban and rural areas has called for immediate investigation to find out whether the existing transmission lines are capable of handlin...
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