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Medupi power station project, South Africa – update

Image of Medupi power plant at night

Photo by Eskom

27th October 2023

By: Sheila Barradas

Creamer Media Research Coordinator & Senior Deputy Editor

     

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Name of the Project
Medupi power station project.

Location
An 883 ha site in Lephalale, Limpopo, in South Africa.

Project Owner/s
State-owned power utility Eskom.

Project Description
Medupi will be the fourth-biggest coal-fired power plant and the biggest dry-cooled power station in the world. The power station will comprise six units with an installed capacity of 4 764 MW.

The planned operational life of the station is 50 years.

The power station will use high-tech supercritical boilers, which will operate at higher temperatures and pressures, compared with those of older boilers, thereby providing greater efficiency. Supercritical technology will result in more efficient use of natural resources, such as water and coal, and will have an improved environmental performance and footprint.

It is the first baseload coal-fired power station to be built in South Africa in more than 20 years and its delivery on schedule is viewed as critical.

The project is somewhat unique because Medupi is being built in reverse order – traditionally Eskom has always started building Unit 1 and ended with Unit 6. This new approach is the result of the rock agglomeration on the southern side of the site, which was excavated and reused for engineering fill on the northern side.

The project forms part of the utility’s integrated strategic electricity plan and is designed to be wet flue-gas desulphurisation (WFGD) ready.

Potential Job Creation
At the peak of its construction, the project employed more than 18 000 people on building activities and another 2 000 supporting employees on site.

Further, more than 4 600 artisans, technicians, engineers and managers have been formally trained by Eskom’s contractors.

Capital Expenditure
The capital cost of the project is R122-billion so far, and Eskom expects to spend about R135-billion on completion of balance of plant.

Planned Start/End Date
All six units’ construction and commissioning activities were completed by July 2021, after more than a decade under construction. The project started construction in 2007.

The first unit, Unit 6, was synchronised to the grid on March 2, 2015. It attained full power (796 MW) on May 26, 2015, and attained commercial operation on August 23, 2015.

Unit 5 was first synchronised to the national grid on September 8, 2016. It reached full power (796 MW) on December 17, 2016, and attained commercial operation on April 3, 2017.

Unit 4 was first synchronised to the national grid on May 31, 2017. It reached full power (796 MW) on June 19, 2017, and attained commercial operation on November 28, 2017.

Unit 3 was first synchronised to the national grid on April 8, 2018. It reached full power (796 MW) on May 16, 2018, and attained commercial operation on June 28, 2019. 

Unit 2 was synchronised to the national grid on October 7, 2018. It reached commercial operation status on November 12, 2019.

Unit 1 was synchronised to the grid on August 27, 2019. It reached commercial operation on July 31, 2021.

Latest Developments
Electricity Minister Kgosientsho Ramokgopa told MPs on October 24 that the country would receive a significant boost in 2024 with the earlier-than-expected return to service of Medupi Unit 4.

He added that an interim solution had been found to expedite the return to service of Medupi Unit 4 by April 2024, instead of August, adding another 800 MW of baseload to the grid ahead of winter, Business Day reported.

Ramokgopa was giving an update on the Energy Action Plan and short- to medium-term interventions to limit the intensity and frequency of loadshedding, and expressed confidence in government’s ability to resolve the problem. He cautioned, however, that “we have turned the corner but we are not necessarily out of the woods”.

Key Contracts, Suppliers and Consultants
Principal Contracts:
Parsons Brinckerhoff (execution partner); Roshcon (enabling civils); Rula Bulk Materials Handling (coal overland conveyor and ash dump conveyor); Mitsubishi Hitachi Power Systems Africa, or now MHI Power (boiler); Alstom S&E Africa (turbine); LP Services consortium (low-pressure services); Alula Water (water treatment plant); Karrena-Concor joint venture, or JV (chimneys and silos); MPS JV (main civils); Actom (electrical power installation and medium-voltage switchgear); General Electric (low-voltage switchgear system); Siemens (auxiliary transformers and generator transformers); Standby Systems (uninterruptible power supply); Alstom C&I (control and instrumentation); Honeywell Automation & Control Solutions South Africa (fire detection and access control); T-Systems (information technology (IT) and IT infrastructure); Siemens ACI Open Consortium (laboratory and analysers); Civcon/G4 JV (miscellaneous infrastructure and reservoirs); Basil Read (buildings, ash dump infrastructure, clarifiers and coal stockyard extension); NCI (diesel generators); thyssenkrupp Materials Handling (coal stockyard equipment); Clyde Bergemann Africa (dust handling and conditioning systems); ELB Engineering Services (terrace coal and ash); Aveng Grinaker-LTA (buildings phases 1 and 3); Nugen Technologies (nitrogen); Stefanutti Stocks/Mathomamayo JV (raw-water pumpstation and substation); WBHO (Excess Coal Stock Yard); Eskom Rotek Industries (dust handling plant – completing scope); and Exxaro (coal supply).

Contact Details for Project Information
Eskom media desk, email mediadesk@eskom.co.za.

Edited by Creamer Media Reporter

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