OMICRON Magazine

Magazine | Issue 2 2018 Substation HV/MV J51 L01 SS1 SS2 G01 G03 L03 L02 G02 J52 Computing center Distribution grid 1 2 3 4 5 6 Two medium voltage cables supply power to the computing center. The protection consists of a combination of directional and non-directional protection systems. The network model in the relaySimTest simplifies the development and implementation of the test plan. «By supplementing conventional tests, system-based test cases have proved to be a simple yet powerful tool for demonstrating the reliability of a protection system as a whole.» Frédéric barré Tests, commissioning, technical consultancy and diagnostics, CESSA test cases were identified in advance. having the option of controlling all the test sets from a single PC was instrumental in making the entire test process incredibly simple. A separate communication channel was used between the respective substations, although relaySimTest also supports a mobile Internet connection. The CMGPS 588 GPS clock was used in order to time-synchronize all of the test sets so that the transient signals could be injected simultaneously. the right concept for the job The test ran for two days and included six main test cases – each with an open or closed busbar coupling and with different fault loops: 1. Fault in incoming line J52 2. Fault in busbar SS2 3. Fault in outgoing feeder G03 4. Fault in bus coupler 5. Fault in outgoing feeder L03 6. Fault in incoming line J51 There were more than 50 test steps here that needed to be implemented. The proposed protection concept showed www.cottens-badoux.ch 11