5 minute read
South Africa needs to face grid realities to overcome the power crisis
by kwedamedia
Levington is the founder of Nexuses (Pty) Ltd., a strategic advisory practice that focuses on the adoption of the green economy in South Africa’s just energy transition. He is a member of the Green Hydrogen Panel and the Project Committee of the South African Renewable Energy Masterplan.
Government, business and labour have consistently been self-serving in their approach to managing the electricity supply industry which has prioritised their vested interests over that of the general public.
For the last 20 years, the increasingly polarised arguments about South Africa’s electricity mix have obsessed with generation technologies – with the assumption that transmission and distribution were such a small part of the overall capital expenditure, that it was not important.
The electricity crisis has changed all of that. Electricity, no matter how it is generated, is of no use unless it can be delivered cost-effectively to a commercial enterprise that can convert it into economic value or to a residential customer to access a better life.
We’re facing a situation where Eskom’s coal fleet is organically decommissioning itself, the energy policy-making framework has become fractured along ideological lines and, whilst legislation has been in place for over two years, SA Inc has woken up to the reality that self-generation is not the free lunch that Eskom has provided them for the last 90 years.
Most importantly, all of South Africa’s key stakeholders have finally woken up to the global new reality that any realistic net zero ambitions over any time horizon will rely as much on the grid as it
will on the mass adoption of solar photovoltaic (PV) and wind.
The architecture of South Africa’s electricity sector as we know it today was set by close interactions between Eskom and South Africa’s mining sector in the 1950s.
And it is here that the history of our electricity supply industry (ESI) determines the extent of the challenge facing the country’s energy transition from both an economic and just transition perspective.
From the 1950s to the 1970s, there was a dramatic scaling up of the size of power stations to exploit the country’s huge coal resources located in Mpumalanga and deliver power to the gold and platinum fields located to the north and west of Johannesburg.
The scale of these capital projects dwarfed the economics of any transmission infrastructure required and thus the pattern was set that the needs of industrial-scale electricity customers would always
be prioritised over those of residential or even small commercial consumers. To some extent, Apartheid was just the formalisation of that relationship between the government of the time and the mining titans.
Today, South Africa yearns for a Just Energy Transition (JET) that will see a large-scale acceleration in the deployment of renewable energy, supported by natural gas and batteries, to solve our fossil fuel addiction and cure all of our social ills. In studies performed by the Council for Scientific and Industrial Research (CSIR) and Meridian Economics in 2021, even a moderate growth scenario for South Africa forecast a 2050 electricity mix with over 150 GW of renewables deployed.
If we were to believe the electric vehicle and green hydrogen ambitions in the JET Investment Plan, we could easily add 100 GW on top of that. Whilst fossil fuel purists might want to scoff at such ambition, it should be recognised that China alone will install more than 300 GW of wind and solar in 2023.
However, if we want to be genuine in meeting both our economic and developmental goals using renewable energy then South Africa needs to wake up to a few realities concerning its grid:
The spatial deployment of a renewables-rich 2050 electricity mix should mean that a National Distribution (rather than Transmission) Plan is critical to address energy poverty and access.
The role of transmission is to move large blocks of power from one part of the country to another: a future energy system where distributed generation will be located closer to where it will be consumed will mean we should be as deliberate about the planning and implementation of the future electricity distribution system as we now are about transmission.
South Africa’s transmission voltages are an anachronism of its past, set at 275 kV because this was the lowest voltage that Eskom power stations connected to each other. Elsewhere in the world, 80 kV and above are generally regarded as transmission voltages.
This causes all kinds of misalignment around grid planning and grid connection. Many independent power producers connect at 132 kV (which is oddly referred to by Eskom as “sub-transmission”).
The digitalisation of economies the world over and the rise of the “prosumer” class will require such networks to create a “smart” relationship between customer and electricity distributor. This will lead to greater integration between traditional electricity distribution and information and communication technology sectors.
Lastly, the historical thesis on which South Africa’s electricity system was designed, whereby the lion’s share of the benefits flow to the political and business elites, needs to be reversed.
To do this, the impact on the delivered cost of electricity due to the prioritisation of the mineral-energy industrial complex, as well as socalled “baseload” technologies, needs to be properly understood and should play a critical role in any decisions on South Africa’s future electricity mix.
