The utility is looking to save a further 1000 megawatts through reduced use by both large and residential customers.
South Africa’s state-owned power utility said it will ask more industrial customers to cut use to prevent managed blackouts during peak-demand times.
“We are currently in negotiations with some of our existing customers to see if we can increase beyond the contracted capacity, but we are also looking at new customers we can bring into interruptible space to ensure we can grow the reserve,” Eskom Holdings acting chief executive Collin Matjila said in a presentation in Johannesburg on Thursday.
The utility has struggled to satisfy demand for power in Africa’s second-biggest economy in the last decade, with a lack of working generating capacity forcing Eskom to schedule rolling blackouts for the first time in six years in March to prevent the total collapse of the grid.
Eskom targets savings of as many as 1 000 megawatts through reduced use by both large and residential customers during peak demand times, said Steve Lennon, Eskom’s group executive for sustainability. It can also interrupt supply to BHP Billiton’s Hillside and Mozal aluminum smelters, saving 2 000 megawatts. Customers who are members of the Energy Intensive Users group, which includes the local units of companies including ArcelorMittal and Glencore, will be targeted, he said.
“We’ve already signed up 190 megawatts and we’ve got about another 200 megawatts that’s in the pipeline,” he said.
Eskom is spending some $50-billion in the five years through 2017 revamping old plants and building new ones to improve reliability of power supply.
“Until new significant generation capacity is online and plant reliability improves, the threat of Eskom not being able to meet demand remains,” Public Enterprises minister Lynne Brown said.
The first of six units of the coal-fired Medupi plant, a 4 764-megawatt facility that will be the world’s largest dry-cooled plant, will be synchronised by the end of the year, with commercial operation expected in the first quarter of 2015, Matjila said.
Medupi has been beset by delays for more than two years, and costs have increased as much as 15% to R105-billion because of contractors’ underperformance and labour disruptions.
The company is going to the market to seek about 500 megawatts of capacity from independent power producers by the end of the year, Lennon said. “We believe there’s quite a lot of co-generation capacity that could be made available immediately from the industrial sector and there are also opportunities for entrepreneurs if they want to have a look at aggregation of standby generators,” he said.
The utility, whose prices are regulated, would recover the costs through “regulatory mechanisms” because it views these expenses as “prudently incurred,” Lennon said.
The Department of Public Enterprises and National Treasury are looking at ways to plug Eskom’s funding gap, Brown said. The shortfall, which has been reduced to R191-billion from R225-billion through cost-cutting measures, resulted after the regulator rejected the company’s plans to raise electricity prices 16% annually in the five years to 2018, instead allowing only an 8% increase.– Bloomberg