Grid frequency and voltage must remain stable for a reliable supply of consumers. However, wind energy and solar power systems provide electrical energy intermittently. How power supply can still function reliably is outlined in the BINE Projektinfo brochure ‘Stable grid with 100 per cent green electricity’ (06/2015).
Researchers model electricity grid with 100 per cent renewable energy
As part of the research project ‘Combined Power Plant 2’, scientists demonstrated that renewable energy can also offer so-called ancillary services. These services support the grid by ensuring that the energy provided is equal to the energy demanded at all times.
Grid inertia is lowered whenever the power supply is fully covered by renewable energy. Technically, wind turbines and solar power systems are fast enough to compensate for this. The power electronics of PV systems can provide primary balancing power within milliseconds, while wind turbines need approximately five seconds.
Voltage stability is another ancillary service that can be provided by renewable energy in the future. Within a given grid level, the voltage may fluctuate by a maximum of ten per cent. Only then can the system remain stable, avoiding damage to insulators and components. The scientists designed a set of rules for the use of renewables with which they can keep the voltage within a predetermined voltage range regardless of the season.
The research project ‘Combined Power Plant 2’ was carried out under the leadership of the Fraunhofer Institute for Wind Energy and Energy System Technology (IWES).
The BINE-Projektinfo brochure “Testing towers and foundations” (05/2015) follow this link:
Uwe Milles/Birgit Schneider
About BINE Information Service
Energy research for practical applications
The BINE Information Service reports on energy research topics, such as new materials, systems and components, as well as innovative concepts and methods. The knowledge gained is incorporated into the implementation of new technologies in practice, because first-rate information provides a basis for pioneering decisions, whether in the planning of energy-optimised buildings, increasing the efficiency of industrial processes, or integrating renewable energy sources into existing systems.
About FIZ Karlsruhe
FIZ Karlsruhe – Leibniz Institute for Information Infrastructure is a not-for-profit organization with the public mission to make sci-tech information from all over the world publicly available and to provide related services in order to support the national and international transfer of knowledge and the promotion of innovation.
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http://www.bine.info/en - BINE-Informationsdienst
Rüdiger Mack | idw - Informationsdienst Wissenschaft
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