PVCROPS Develops Innovative New PV Power Ramp Rate Control System

PVCROPS has developed an innovative new system that makes it possible for transmission system operators to halve the size of the energy storage systems required to mitigate against PV power fluctuations.

Over the last few years, the considerable increase in the number of multi-MW PV plants has led transmission system operators (TSO) to express concern over potential PV power fluctuations caused by transient clouds. As a result, new grid codes are being issued in order to include new criteria that make it easier for the TSO to react appropriately to harmful short-term power fluctuations. Faced with this situation, some type of energy storage system (ESS) is required in order to smooth out these fluctuations and comply with the regulations.

Previous studies dealt with the ESS capacity required to comply with the maximum allowable ramp-rates stated in the grid code regulations, for any PV plant size for the worst fluctuation model. As the sign of the first fluctuation is unknown, a double capacity battery is required to absorb both the upward and downward fluctuations.

Members of the PVCROPS Team have developed two innovative management strategies which make it possible to half the size of the ESS state of the art. The general validity of both strategies has been confirmed through simulations carried out with real operational PV power output data taken every 5 seconds in the course of one year at the 38.5MW PV power plant of Moura, Portugal.

To learn more about this technology, contact Stephen Davis on +353 1 402 7144 or email stephen.davis@dit.ie

Click here to view this article on Renewable Energy World. To view the full paper written by PVCROPS researchers, visit Sciencedirect.com