Digital Substation is an engineering publication focused on IEC 61850 automation, protection systems, and digital grid intelligence.
The Yamal LNG plant is powered by an islanded on-site power station rated at 376 MW and built around eight gas-turbine units; its distribution network spans 110, 35, 10 and 0.4 kV and more than five hundred feeders. Islanded operation places tough demands on stability, short-circuit and protection-selectivity calculations — and therefore on how up-to-date the digital model is. The article describes a cycle that automatically updates a DIgSILENT PowerFactory network model from DMS telemetry: the load-flow calculation runs as a single process in external-control (Engine) mode, without opening the GUI, and starts automatically whenever a new export appears. All control, power-balance diagnostics and analysis of the accumulated case history live in a Windows notification-area icon. The solution was built in-house and, in operational effect, is comparable to commercial real-time modules whose licences for a power system of this scale run into tens of millions of roubles.