Overview of Maintenance Infrastructure Delivery of Eskom Eng

Overview of Maintenance & Infrastructure Delivery of Eskom Eng Logan Pillay 10/28/2021 Eskom Academy of Learning 1

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Overview • Unplanned Capability Loss Factor (UCLF) measured by the time a generator had spent out of service owing to plant failure • UCLF increased from 5. 1 % in 2010 to 11 % in 2014 as a result of a delay in maintenance by Eskom • Out of 87 coal-fired generating units, 32 require major ‘Surgery’ and 4 are in a critical condition • Medupi is scheduled to be synchronised to the grid on 24 December 2014 • This additional capacity will not be fully leveraged if the condition of existing power plants continue to decline

How Eskom is Dealing with Maintenance Challenges • Eskom has decided that we cannot put off maintenance any longer and asked industrial clients to cut back on consumption to accommodate maintenance • This strategy yielded good results with ‘Tightly forged’ relationship with 140 large customers • Eskom’s ‘Winter plan’ where industrial customers curtail their energy demand to enable maintenance activities, yielded good results • Turbine and Generator maintenance and refurbishment done by Rotek Engineering (Part of Eskom), this can be done without contracts etc • Rotek is a strategic asset for Eskom, no costly transportation overseas • Eskom has a better handle on system after managing to deal with some opportunity maintenance over South Africa’s winter months, reducing partial losses from an excess of 3500 MW to 1500 MW

How Eskom is Dealing with Infrastructure Development Challenges • Medupi and Kusile when fully commissioned will deliver 2 X 4800 MW onto the grid • Labour disruptions both at Medupi and in July 2014 at Kusile by civil contractors, disciplinary action is being taken • Full workforce is now on site at Kusile and Eskom transferred additional resources into project, planned synchronisation of first unit is 2016 • A commercial strategy has been defined to increase contractors resources and improve their performance • Boiler contractor improved boiler construction progress from 0. 48 % a week in March to 0. 74 % a week in September, further improvement is required to achieve the target date (This is being addressed)

How Eskom is Dealing with Infrastructure Development Challenges • Eskom is working with Control and Instrumentation (C&I) contractor to ensure it supported the target synchronisation date and had implemented ‘Additional measures’ to migrate the schedule and risk • Eskom is simultaneously developing 60 grid – strengthening projects to bolster and upgrade it’s national transmission network • All of these designs for new Transmission and Substations are being done inhouse • Eskom is also documenting the design philosophy under a series of technical books named the ‘Eskom Power Series’ • Training courses are also developed based on these books

Eskom Power Series • Knowledge capture and retention is a concern in the industry, there is a gap between experienced engineers and young graduates • Eskom pioneered a strategy to capture this know how and make it accessible to young graduates, consulting companies, Universities and Universities of technology – ‘Open source Engineering’ • 12 technical books have been produced and is sold internationally bringing R 1 million revenue into Eskom but also assisting to build a local industry for the Power industry • Titles include overhead line design, Insulators, Transformers, Instrument Transformers, High Voltage Direct Current (HVDC), Corona, Thermodynamics, Engineering Calculations for wind and concentrated solar thermal • Non technical books are also being produced such as Mentorship and Coaching, Winning with People, and a Procurement Book ( South Africa’s biggest challenge)

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Concluding Remarks • Eskom cannot solve South Africa’s challenges alone, strong partnerships are required between Government, State owned enterprises and private sector • Long Term Planning is crucial for development of the Country • Turn ‘Strategies’ into ‘Dreams’ 14

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