Modern Quarrying October-November 2015

AROUND THE INDUSTRY

Smarter energy grid needed South Africa would get a much better return on its energy investments if it planned a smarter and more flexible electricity grid, Institute for Security Studies (ISS) researcher Steve Hedden believes. Government’s response to power

“Electricity generation is thus becoming decentralised and intermit- tent, and the line between consumer and producer is blurring, Hedden says. At the same time, the electricity sector is transitioning away from a centralised monopolistic model, with new players taking on roles and responsibilities his- torically controlled by Eskom. The grid used to handle only a one-way flow of power from producer to consumer. Now it has to accommo- date potentially millions of small-scale producers feeding energy into the grid. Small-scale residential power genera- tion from solar panels could account for 30 GW of electricity-generating capacity in South Africa by 2050, but its contribu- tion today is retarded by an absence of clear policies and regulation. “A more intelligent grid would be the result of investments in grid effi- ciency, and better electricity planning, operations and policies,” Hedden adds. www.issafrica.org

the grid at all, though transmission was included in an IRP update in November 2013. “Grid planning can’t be an after- thought. It has to be built in from the start,” he says. Planning the grid was much easier when a few big power stations pro- vided energy mostly to a few big cit- ies, with one organisation responsible for the entire system. In South Africa it was Eskom producing electricity at coal-fired power plants in Mpumalanga, the largest net supplier, and delivering most of it to the economic heartland of Gauteng, the largest net consumer. The source of power is shifting. By 2040, Limpopo’s new coal-fired plants will make it the largest net supplier; and new gas and renewable capacity will make the three Cape provinces net producers. Planners must also now consider the rise of renewable energy, and the addition of independent power produc- ers (IPP). On top of this is small-scale res- idential generation as frustrated citizens install their own rooftop solar panels.

shortages and load-shedding has been a thrust towards more power generation from coal-fired power plants, oil and gas, renewables, and potentially a fleet of new nuclear power stations. “But fixing South Africa’s energy crisis is not just about gen- erating more energy,”Hedden says at the Pretoria launch of a new research paper called Gridlocked. “It doesn’t make sense to invest heavily in generation capacity without also rethinking transmission and distribution.” Energy planning in South Africa has neglected the key element of how elec- tricity moves from generation to con- sumption, Hedden maintains. The Integrated Resource Plan for Electricity 2010–2030 (IRP 2010), adopted in March 2011, did not address

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MODERN QUARRYING

October - November 2015