Cape Town Mayor Geordin Hill-Lewis is taking steps to protect the city from Stage 3 load-shedding by 2027 at a minimum – but preferably Stage 4 – in a move that he believes will facilitate “meaningfully faster” growth across the metropole.
“Not only is it inconvenient to have load- shedding, but right now the energy crisis is the biggest handbrake on the South African economy.”
The mistake that the City of Cape Town has made for a long time is to assume that there is a credible pathway out of load-shedding at a national level, and that the end of load-shedding is just around the corner, notes Hill-Lewis.
“I think time has shown that this is not the case, and that it is unlikely to be the case for at least the medium term, or until there is significant additional power generation capacity brought on board at a national level.
“However, taking additional capacity on board is taking so long, and there is so much resistance to doing so, that we have realised that we cannot wait for State-owned power utility Eskom or the Department of Mineral Resources and Energy for an answer, and that we must press ahead and do this ourselves,” he says.
“I think we must be really aggressive about trying to reduce our reliance on Eskom, and to bring additional capacity on line as quickly as possible.”
Hill-Lewis believes that reducing Cape Town’s reliance on Eskom should also ease pressure on the national grid, thereby lowering the likelihood of national load-shedding.
“Also, the price of Eskom power is now so high and the price of renewable power so low, that this actually is an opportunity to begin passing on savings to the consumer.”
South Africa’s electricity tariffs have increased by more than 300% over the last decade, while renewable energy is becoming more affordable, with the cost of solar dropping by 90% since 2000.
Power Through IPPs
Cape Town would primarily look to procure additional power through independent power producers (IPPs), says Hill-Lewis.
“Initially, the proportion that comes from IPPs would be so small that it won’t make a difference to the overall price.
“But, as that portion grows and the Eskom portion shrinks, we might get to a situation where you can pass on savings to consumers.”
Tenders to procure up to 300 MW of electricity from IPPs have already been published.
At this point, the city is not looking at building its own power-generation facilities, says Hill-Lewis.
“We are having this debate internally in the city’s structures. Quite a few people think we should do our own project, but I have a fairly strong preference for IPPs.
“But, I do understand that if we do a storage project aimed at load-shedding reduction, then there may – and I stress may – be a stronger argument for doing our own project, but that is still to be determined.”
IPP power generation from renewable sources (mostly solar in this case) will not stop load-shedding in itself.
“If you just have extra energy, you are lowering your load, but you don’t have spare capacity for when load-shedding hits.
“The trick is to combine that with some method of storage. Contracting IPPs is the easy part of this process. Figuring out storage is the real conundrum.”
At this stage, however, the City of Cape Town is going to market to secure IPP renewable generators first, with storage projects to follow at a later stage.
“There are various options available to us,” explains Hill-Lewis.
While the cost of battery storage is falling, it remains high, so Cape Town is also considering other options, including pumped storage.
“We can expand the Steenbras pumped- storage hydroelectricity scheme, but that is very capital intensive. So there are lot of options, but that will follow at a later stage.”
IPP Timelines
“We have very specific timelines for IPPs, at between 40 and 50 months from now to the completion of the projects and for all of the planned power to be available.
“We are not necessarily setting a cap at 300 MW, but I suspect we’ll end up around there. To do co...