Enter service category Eg. DSTV Installers. Enter City Name, Eg. No documents submitted for verification -- Years in Business -- Employees. Request a quote. Send an enquiry email. Write a Review. There are no photos. He also stresses that the risk of load shedding is arguably more pronounced in the high-maintenance summer months than during winter, when Eskom is geared to meet an evening peak that rises by around 4 MW when compared with loads experienced during the course of the day.
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Sign up for our FREE daily email newsletter. Advertising on Polity. Email advertising creamermedia. Menu Menu Search By. Inside Eskom National Control as peak pressures mount. Deepening Democracy through Access to Information. Follow polityZA. Close Search Polity. All these words. Any of these words. This exact phrase. There are also some solid cyan blocks indicating that digital communications have broken down and that generation information from those stations should be confirmed offline.
Only a few of the open-cycle gas turbines OCGTs , which are hugely expensive to run, are shown to be operating, along with some of the pumped-storage units. Thus, barring any major unforeseen generation losses, Van Heerden is relatively confident Eskom will beat the Thursday evening peak, which will officially endure from to By , demand has breached the 31 MW level and is rising rapidly.
Ten minutes later there are indications that some more OCGT and pumped-storage capacity is being introduced. At , demand breaches the 32 MW mark and frequency levels begin to fall.
The 33 MW level is surpassed less than 15 minutes later , by which time just about all the OCGT generators are shown to be operating. Once all the diesel generators and pumped-storage units are operational available capacity on this Thursday evening rises to nearly 34 MW, with demand closing in fast.
In fact, by , the 34 MW level is breached. At this time, a number of energy-intensive industries begin to switch off either in line with contracts concluded with the utility, or to avoid the higher winter peak tariff. Demand does indeed begin to fall and is back below 33 MW by He explains that, while load shedding remains a possibility in light of the constraints, the utility has no immediate plans to resume implementation, most of which will be conducted with the help of municipalities, which have load-shedding schedules.
Inside the control room where the electricity balance is monitored and maintained, a huge screen the size of those used in a movie theatre, lists rows and rows of figures that constantly change as supply and demand data is updated dynamically. The data on the screen lists the working power stations, the amount of power being generated and the amount of power being used. On the right side of the giant screen, a map depicts the country's transmission system where the frequency of the supply across the country is displayed as engineers try to keep the optimal balance between supply and demand at about 50Hz.
To show how dynamically and rapidly the electricity demand is, Van Heerden points out that when the group started monitoring demand at 5. At that point the load was 31,MW and then, just 12 minutes later, as electrical current was drawn from the plug sockets, the load reached 32,MW.
It would keep climbing until the industrial consumers reduced their consumption because of peak tariffs from 6pm and as they did so, the national grid would stabilise once again. The control room has six engineers together with technicians who each work a hour shift.
Before a team member is appointed, a special evaluation is done on the individual's ability to handle stress because working in the control centre is stressful and needs constantly cool heads. Asked about load shedding and power cuts, Van Heerden insisted that Eskom was doing all it could to prevent these and so far it had managed to do so. He says that some consumers blame any sudden power cut on load shedding when it is not the case and the fault has most often been caused by a problem at a sub-station, a fault in the distribution network or even by thieves stealing electrical cables in another part of town.
Source: Sapa via I-Net Bridge. Category Most recent Most read All industries Most recent Most read Tags power load-shedding supply balance Demand industrial residential. Email Print PDF. Our products include workstations, web applications and data feeds packaged with in-depth news and powerful analytical tools empowering clients to make meaningful decisions. We pride ourselves on our wide variety of in-house skills, encompassing multiple platforms and applications.
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