Supervision of a distributed energy resources generation system using IEC and ISA standards

This paper develops a proposal for designing a SCADA system for the supervision of a photovoltaic generation system using IEC 61850 and ISA S101 international standards, and industrial communication protocols such as Modbus TCP and OPC. The complete description of the elements of the generating system and communication architecture for this, based on the standard IEC 61850-7-420 is performed. This standard contains the logical nodes (LNs) for modeling systems of distributed energy resources (DER). An important contribution of this work is the design of the human-machine interface (HMI) of the SCADA, which follows the guidelines of the new standard ISA S101, which makes innovative proposals for graphical display of the processes to improve situational awareness in the supervision. The standard has been proposed for industrial processes, but is expected to be adopted in the power systems supervision. Additionally, the inclusion of a section that allows to select two new modes of operation (back up and optimization), as a contribution to the objective of integration of distributed generation in existing power system to promote the transition to a smart grid is highlighted. Finally, the continuous calculation of the amount of CO2 emissions that are avoided and the update on the carbon debt caused by the use of DER sources as a contribution to improving energy efficiency and a new variable to the relevant supervision system is presented. For this job is used mature technology in the electronic component of process control so the contribution is aimed at DER sources supervision and their integration into the power system.