Evaluation of IEC 61175 for semanticinterpretation in OPAL-RT referencedistribution network and Jess-OPC

Abstract: In the past few decades the electric power system has seen tremendous growth in termstechnology such as integration of DG and advanced power electronics devices. Such developmentsmainly include renewable energy, increased use of HVDC transmission, state ofthe art communication systems and adaptation of information modeling standards appliedto power systems. In this thesis work a RBTS distribution grid network model has beenimplemented in OPAL-RT to integrate automation and ICT with more devices. These motivateuse of standardization like IEC 61850 and IEC 61175. This network model is usedfor verification of earlier developed monitoring and control methods at the ICS department.The verification setup involves interfacing of the network models in OPAL-RT with Jessrule engine via OPC. The focus of this master project work is evaluation of the use of IEC61175 for consistent signal naming in the network model. It is done through detailed signalmodeling in the Simulink model for use in the real time simulation and implementation ofa graphical user interface to show all the signals along with their measured value in a treeview. Second part of the work focuses on utilization of the signal modeling in high-levelapplications. The applications can utilize the consistent signal naming done by using IEC61175 to implement a semantic reasoning model for interpretation of the signals and therebyimprove the monitoring and control functions. An interface has been implemented to generatean XML file of the mapped signals along with the last measured value for the parserimplemented in Java. After parsing the XML file all the data is used for the Jess rule engineto fire the particular rule in a specific situation. Some rules are implemented for monitoringthe system voltage and for finding out the signals associated with distributed generationunit to calculate their actual generation in the network. In this project an ontology basedapproach is also performed in JADE to get a clear idea of integration of information sources.Results of the work show that proper signal designation in a network according the standardIEC 61175 can potentially help reduce the complexity and improve reliability of operations.