Title:	Minimizing Energy Storage Requirement for PV Power Ramp-Rate Limitation Controlling the Inverters MPPT
Author(s):	I. , J. Marcos, M. García, L. Marroyo
Keywords:	Large Grid-Connected PV Systems, Storage, Prediction, Grid Stability
Topic:	OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (from Cells to Systems)
Subtopic:	Operation of PV Systems and Plants
Event:	29th European Photovoltaic Solar Energy Conference and Exhibition
Session:	5CO.15.3
Pages:	2376 - 2379
ISBN:	3-936338-34-5
Paper DOI:	10.4229/EUPVSEC20142014-5CO.15.3
Price:	0,00 EUR
Document(s):	paper, presentation

Abstract/Summary:

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Short-term variability in the power generated by large grid-connected PV plants can negatively affect power quality and the network reliability. New grid-codes require combining the PV generator with some form of energy storage technology in order to reduce short-term PV power fluctuation. Herein, an effective control is proposed to comply with the maximum allowable ramp-rate limitation with the minimum energy storage capacity. This works presents a new state of charge (SOC) control involving some changes in the the maximum power point tracking (MPPT) algorithm of the inverters. The solution is corroborated with 1-year 5 second power measurements which were recorded at the output of 550 kW inverters at the 38.5 MW Amareleja (Portugal) PV plant.