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R231 million Pennyville and Mondeor substation upgrades to help stabilise Joburg power grid

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Last Tuesday, 18 June 2019, the Executive Mayor of the City of Joburg, Councillor Herman Mashaba joined the MMC for Environment and Infrastructure Services, Councillor Nico de Jager, on an oversight visit to two City Power substations in the south of Johannesburg.

The two substations are currently undergoing infrastructure build upgrades, which are expected will increase City Power’s capacity to provide reliable power supply to residents. In order to future-proof these upgrades, City Power ensured that new service connections can be made from the substations without compromising the stability of the grid.
Mayor Mashaba said these substations “will add significantly” to the City Power grid once newly refurbished, and said they would “ease the burden of the R170 billion infrastructure backlog” saddling his administration. The upgraded grid will be able to handle a high demand of electricity during peak hours.

The building of a primary plant at Mondeor Substation is 90% complete. The R134 million upgrade will allow the transfer of electricity from Eikenhof to Mondeor substations and also ensures that Mondeor Substation becomes a back-up power supplier to Rand Water Board in the event of a power failure at Eikenhof substation.
The completion of a double busbar at the Pennyville Substation’s switching station will increase capacity and ensure transfer of power between Fordsburg and the future Quattro substations. This R97 million upgrade will cater for growth in the inner city and act as a backup for Delta Substation.

Furthermore, with the installation of Scada, DC-system and telecommunications equipment at these substations, the monitoring, gathering and processing of real-time data will allow City Power to detect fault on the network much earlier.

 As refurbishments continue, City Power is undertaking to avoid any power disruptions as a result thereof. However, the City of Joburg has promised that if extreme circumstances necessitates that power be switched off, residents will be notified well in advance.