Energy Scheduling of Battery Storage Systems in Micro Grids

Microgrids in island mode with high penetration of renewable energy sources in combination with gensets and battery storage systems need a control system for voltage and frequency. In this study the main goal is maximization of the energy feed-in by renewable sources. Therefore it is necessary to keep the State of Energy for the Battery Storage System in a range that the excess energy can be absorbed and used in a later period of the day. In this paper an approach for State of Charge scheduling based on load and generation prediction is described

Digest of "Evaluation of Equivalent Circuit Diagrams and Transfer Functions for Modeling of Lithium-Ion Batteries"

The rapid developments in the field of electrochemistry, enabled lithium-ion batteries to achieve a very good position among all the other types of energy storage devices. Therefor they became an essential component in most of the modern portable and stationary energy storage applications, where the specific energy plays an important role. In order to analyze and optimize lithium-ion batteries an accurate battery model for the dynamic behavior is required. This paper presents a comparison between equivalent circuit diagrams and fractional rational functions with the complex variable s for lithium-ion battery modeling. It is described how to identify the parameters of the models in both time and frequency domains. The validation of the different models is done for high and low dynamic current profiles. In the first step the dependency of all model parameters on the temperature and on the battery age is neglected

Energy Scheduling of Battery Storage Systems in Micro Grids

Microgrids in island mode with high penetration of renewable energy sources in combination with gensets and battery storage systems need a control system for voltage and frequency. In this study the main goal is maximization of the energy feed-in by renewable sources. Therefore it is necessary to keep the State of Energy for the Battery Storage System in a range that the excess energy can be absorbed and used in a later period of the day. In this paper an approach for State of Charge scheduling based on load and generation prediction is described

La energía eólica en Alemania: experiencia a tener en cuenta para el caso colombiano

A general description of the aspects related to the beginning, development, current state and future of wind power in Germany is presented. Some topics like green energy policies, energy potential and some technical and operative problems are showed. Finally, many useful ideas extracted from German experience are presented, in order to provide guidelines for the future development of WE in the Colombian power system.En el presente artículo, se realiza una descripción general de los aspectos relacionados con el inicio, desarrollo, situación actual y perspectivas de la energía eólica en Alemania. Se trabajan tópicos como el marco regulatorio, la descripción del potencial eólico y algunas problemáticas técnicas y operativas experimentadas por algunos operadores de red del sistema Alemán. Finalmente, se plantean, guardando las proporciones, algunas comparaciones con el caso colombiano y los respectivos análisis para el proceso de implantación masiva de la energía eólica en Colombia