This work presents a review on the OLE FOR PROCESS CONTROL-UNIFIED ARCHITECTURE OPC-UA framework and standards aiming to use OPC-UA in SmartGrids applications. The support for Service Oriented Architecture (SOA) and native security implementation of the OPC-UA are analyzed as an option to supervise and control small Microgrids, like microgeneration farm in Green Datacenters. Based in these features a communication model based on OPC-UA framework was proposed. The main contribution of this work is a performance evaluation of the OPC-UA transmission time between Microgrids devices (electrical converters and inverters, power meters and controllers) and the comparison with IEC 1646 and IEC 61850 standards requirements.

In this paper a simple approach to is presented to economically optimize the power dispatch in a small microgrids environment. The optimization is modeled as a linear program problem and was solved by the Gnu Linear Program Tool Kit (GLPK). The converters and inverters that compose the microgrid use the OPC-UA protocol over Ethernet network to exchange data. The main contribution of this paper is the development of a simple optimizer system and friendly communication framework, compatible with small microgrids using renewable energy sources, like green data-centers and home environments to minimize the energy cost subjected to power limits of energy sources and loads demands.