Life cycle management for power transformers in the Eskom distribution network - case study
- Chilwane, Sarah Refilwe Mpho
- Authors: Chilwane, Sarah Refilwe Mpho
- Date: 2014-06-20
- Subjects: Eskom (Firm) , Electric transformers - South Africa - Maintenance and repair
- Type: Thesis
- Identifier: uj:11553 , http://hdl.handle.net/10210/11260
- Description: M.Ing. (Engineering Management) , Electricity is a crucial key component in every day life influencing the economy, safety; health, productivity and comfort just to name a few. The benefits and importance of electricity can be easily taken for granted by the consumer. Towards the end of 2007, South Africa suffered numerous power outages and that lead to the implementation of load shedding by Eskom, the electricity utility in South Africa, in order to manage the shortage of electricity. Electricity utilities constantly make decisions that affect the cost, reliability and quality of their services. Therefore engineering designs and maintenance strategies should be updated frequently. The benefits of these updates to the system would have a significant performance improvement in regards to reliability and the quality of the electricity. The outline of asset management is therefore to focus on the business assets so that the organisation could serve the customers effectively. As a result, the focus for the research is to develop a life cycle management plan for one of the main assets utilised in the distribution network namely power transformers. The research would include a study of power transformers and customs that could be used to improve the reliability, logistics, safety and the capital investments of the network. Power transformers are static equipment, and failure rate is very low compared to other assets found in substations. As a result of their sizes, transformers requires more time and special arrangements should a failure occur. A risk and condition analysis was conducted on transformers and the results and conclusions were discussed.
- Full Text:
- Authors: Chilwane, Sarah Refilwe Mpho
- Date: 2014-06-20
- Subjects: Eskom (Firm) , Electric transformers - South Africa - Maintenance and repair
- Type: Thesis
- Identifier: uj:11553 , http://hdl.handle.net/10210/11260
- Description: M.Ing. (Engineering Management) , Electricity is a crucial key component in every day life influencing the economy, safety; health, productivity and comfort just to name a few. The benefits and importance of electricity can be easily taken for granted by the consumer. Towards the end of 2007, South Africa suffered numerous power outages and that lead to the implementation of load shedding by Eskom, the electricity utility in South Africa, in order to manage the shortage of electricity. Electricity utilities constantly make decisions that affect the cost, reliability and quality of their services. Therefore engineering designs and maintenance strategies should be updated frequently. The benefits of these updates to the system would have a significant performance improvement in regards to reliability and the quality of the electricity. The outline of asset management is therefore to focus on the business assets so that the organisation could serve the customers effectively. As a result, the focus for the research is to develop a life cycle management plan for one of the main assets utilised in the distribution network namely power transformers. The research would include a study of power transformers and customs that could be used to improve the reliability, logistics, safety and the capital investments of the network. Power transformers are static equipment, and failure rate is very low compared to other assets found in substations. As a result of their sizes, transformers requires more time and special arrangements should a failure occur. A risk and condition analysis was conducted on transformers and the results and conclusions were discussed.
- Full Text:
The reliability and maintainability of the transmission transformers in South Africa
- Authors: Molabe P.P.
- Date: 2018
- Subjects: Eskom (Firm) , Electric transformers - South Africa - Maintenance and repair , Electric insulators and insulation , Electric power transmission , Electric power supplies to apparatus
- Language: English
- Type: Masters (Thesis)
- Identifier: http://hdl.handle.net/10210/286013 , uj:30941
- Description: M.Phil. (Engineering Management) , Abstract: The power utilities have the challenging task of supplying electricity and meeting stakeholders expectations with constrained resources. Like other power utilities, Eskom has a mandate of generating and distributing electricity in a safe, reliable and cost-effective ways. The success and failure of the South African power utility are depended on the capabilities of the transformers and the maintenance strategies adopted to support the systems. This study presents the finding of the reliability and maintainability analysis of the transmission transformers in Eskom from the period of 2014 to 2016. The study used statistical methods to analyse secondary data from Eskom operational records and reports. During the period of analysis, Eskom experienced twenty-nine failures related to transmission transformers. The study shows that Eskom was operating with the ageing transmission transformers, the protection system and bushings came out as dominating causes for malfunctions. It is recommended that Eskom change the maintenance strategy and focus on replacing the high failing component or systems to improve reliability.
- Full Text:
- Authors: Molabe P.P.
- Date: 2018
- Subjects: Eskom (Firm) , Electric transformers - South Africa - Maintenance and repair , Electric insulators and insulation , Electric power transmission , Electric power supplies to apparatus
- Language: English
- Type: Masters (Thesis)
- Identifier: http://hdl.handle.net/10210/286013 , uj:30941
- Description: M.Phil. (Engineering Management) , Abstract: The power utilities have the challenging task of supplying electricity and meeting stakeholders expectations with constrained resources. Like other power utilities, Eskom has a mandate of generating and distributing electricity in a safe, reliable and cost-effective ways. The success and failure of the South African power utility are depended on the capabilities of the transformers and the maintenance strategies adopted to support the systems. This study presents the finding of the reliability and maintainability analysis of the transmission transformers in Eskom from the period of 2014 to 2016. The study used statistical methods to analyse secondary data from Eskom operational records and reports. During the period of analysis, Eskom experienced twenty-nine failures related to transmission transformers. The study shows that Eskom was operating with the ageing transmission transformers, the protection system and bushings came out as dominating causes for malfunctions. It is recommended that Eskom change the maintenance strategy and focus on replacing the high failing component or systems to improve reliability.
- Full Text:
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