International Journal of Engineering and Applied Physics, 2024
This study assessed the impacts of natural phenomena-induced electrical faults on the distributio... more This study assessed the impacts of natural phenomena-induced electrical faults on the distribution system of Lagos, served by Ikeja and Eko electricity distribution companies. The research evaluated the frequency, technical, cost, and reliability impacts of these faults. The study employed statistical and software-based short circuit fault analyses as well as system reliability indices methods to identify the most vulnerable feeders to nature-induced faults. It also simulated the network's response to fault currents and estimated the monthly costs of nature-induced outages. For the data period, an average of 20 to 43 nature-induced faults occurred annually on the networks. The obtained fault currents ranged from 0.67kA to 0.78kA and 0.52kA to 1.02kA for the 11kV and 33kV networks, respectively, which was useful for setting up installed breakers. The estimated average monthly cost of nature-induced energy loss was found to be between ₦3 million and ₦143 million for Eko and between ₦0.01 million and ₦108 million for Ikeja. The System Average Interruption Frequency Index and System Average Interruption Duration Index did not exceed 4 and 60, respectively, on 33kV network. In conclusion, natural phenomena-induced electrical faults had significant impacts, particularly in terms of monthly costs and investments in its mitigation should be explored.
The distribution system is essential in the provision of electricity for all consumers. However, ... more The distribution system is essential in the provision of electricity for all consumers. However, outages occasioned by faults are a major setback in ensuring a regular supply of electricity to consumers in a populous state like Lagos. This study analyses the outage causes, their cost, energy loss, and duration of outages experienced by electricity consumers in the distribution systems of Lagos State. The fault reports of Eko Electricity Distribution Company (EKEDC) and Ikeja Electricity Distribution Company (IKEDC) were used for the analysis. The analysis revealed that the main causes of outages on the network are transient faults (356.78 occurrences per month) and jumper cuts (352.83 occurrences per month). The average monthly cost impacts of the outages on the network are estimated to be between ₦631m & ₦837m and ₦837m & ₦1.66b for the 11kV and 33kV networks of the State respectively. The average monthly energy lost due to outages on the network for the period under review is sign...
This paper analysed empirical system data of nature-induced electrical faults, its variation, and... more This paper analysed empirical system data of nature-induced electrical faults, its variation, and ratings in the distribution networks of Lagos State, Nigeria, which affect the power distribution system infrastructure, end-users of electricity, and the economic development of the distribution companies, consumers, and the nation at large. Fault-based outage data (at installed 11 kV and 33 kV nominal network voltages) were obtained and analysed by natural phenomena (NPs) using relative frequency, seasonal variation, and probabilistic statistics. From obtained results, the following were established: NP-induced electrical faults are prevalent in the distribution systems of Lagos State, and it is more towards or closer to the mainland; vegetation (67%) and birds/snakes (24%) are the most predominant fault-causing NPs in the distribution networks; floods (0.1%) rarely cause electrical faults in these distribution networks despite being a coastal region; and NP-induced electrical faults ...
International Journal of Engineering and Applied Physics, 2024
This study assessed the impacts of natural phenomena-induced electrical faults on the distributio... more This study assessed the impacts of natural phenomena-induced electrical faults on the distribution system of Lagos, served by Ikeja and Eko electricity distribution companies. The research evaluated the frequency, technical, cost, and reliability impacts of these faults. The study employed statistical and software-based short circuit fault analyses as well as system reliability indices methods to identify the most vulnerable feeders to nature-induced faults. It also simulated the network's response to fault currents and estimated the monthly costs of nature-induced outages. For the data period, an average of 20 to 43 nature-induced faults occurred annually on the networks. The obtained fault currents ranged from 0.67kA to 0.78kA and 0.52kA to 1.02kA for the 11kV and 33kV networks, respectively, which was useful for setting up installed breakers. The estimated average monthly cost of nature-induced energy loss was found to be between ₦3 million and ₦143 million for Eko and between ₦0.01 million and ₦108 million for Ikeja. The System Average Interruption Frequency Index and System Average Interruption Duration Index did not exceed 4 and 60, respectively, on 33kV network. In conclusion, natural phenomena-induced electrical faults had significant impacts, particularly in terms of monthly costs and investments in its mitigation should be explored.
The distribution system is essential in the provision of electricity for all consumers. However, ... more The distribution system is essential in the provision of electricity for all consumers. However, outages occasioned by faults are a major setback in ensuring a regular supply of electricity to consumers in a populous state like Lagos. This study analyses the outage causes, their cost, energy loss, and duration of outages experienced by electricity consumers in the distribution systems of Lagos State. The fault reports of Eko Electricity Distribution Company (EKEDC) and Ikeja Electricity Distribution Company (IKEDC) were used for the analysis. The analysis revealed that the main causes of outages on the network are transient faults (356.78 occurrences per month) and jumper cuts (352.83 occurrences per month). The average monthly cost impacts of the outages on the network are estimated to be between ₦631m & ₦837m and ₦837m & ₦1.66b for the 11kV and 33kV networks of the State respectively. The average monthly energy lost due to outages on the network for the period under review is sign...
This paper analysed empirical system data of nature-induced electrical faults, its variation, and... more This paper analysed empirical system data of nature-induced electrical faults, its variation, and ratings in the distribution networks of Lagos State, Nigeria, which affect the power distribution system infrastructure, end-users of electricity, and the economic development of the distribution companies, consumers, and the nation at large. Fault-based outage data (at installed 11 kV and 33 kV nominal network voltages) were obtained and analysed by natural phenomena (NPs) using relative frequency, seasonal variation, and probabilistic statistics. From obtained results, the following were established: NP-induced electrical faults are prevalent in the distribution systems of Lagos State, and it is more towards or closer to the mainland; vegetation (67%) and birds/snakes (24%) are the most predominant fault-causing NPs in the distribution networks; floods (0.1%) rarely cause electrical faults in these distribution networks despite being a coastal region; and NP-induced electrical faults ...
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