INDUSTRY I GRID
However, supplying the power generating plants with grid- stabilising characteristics will not be sufficient in the future to guarantee grid stability.
To balance out the fluctuations in the amount of energy fed into the grid by renewable sources, we will firstly have to massively expand our grid infrastructure. Secondly, reserve and control power are important, as indeed are more energy storage facilities over the medium term.
Pumped-storage hydroelectricity is currently the only means of energy storage. Possible solutions in the future include compressed air energy storage or a vehicle-to-grid (V2G) system, i.e. a system in which an overtaxed electrical grid can draw energy from a group of cars, and then recharge them at times when energy is in abundance.
Conclusion
The grid compatibility of photovoltaic systems is becoming more and more important. The complex certification process should be mastered with the help of qualified experts. To avoid costly rework or retrofitting measures, the aspect of grid compatibility and the required certification should be considered right from the plant’s design stage. TÜV SÜD’s experts provide support in ensuring a targeted and efficient certification procedure.
© 2012 Angel Business Communications. Permission required.
Excursus: Hazard potential and operational risks
In addition to grid compatibility certification, which assesses the interoperability of the entire electrical architecture, owners must also identify plant-specific risks at an early stage to take appropriate risk-prevention measures. Photovoltaic systems connected to the grid are power plants, and their hazard potential consequently differs little from that of other technical plants.
Most damage to photovoltaic plants is caused by inexpert installation. Covering or dismantling of lightning protection systems and inadequate securing of cable routing may cause considerable fire-safety hazards. The required inverters form another critical point; they must be installed and operated under the environmental conditions specified by the manufacturer.
The aspect that the plant and its cable system are exposed to all kinds of weather conditions over years should also be taken into account.
TÜV SÜD’s experts identify potential hazards and risks throughout Germany, thus making the world a safer place.
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Issue V 2012 I
www.solar-international.net 19
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