Technical drawings or data for the 110 kV high-voltage distribution systems that feed these specific railway grids. Regional Usage
Hz to the modern 16.7 Hz standard to prevent synchronism issues in rotary converters. low-frequency-16.7z
Small-signal models or HIL (Hardware-In-the-Loop) simulation results testing the stability of 15 kV / 16.7 Hz networks. Research Papers: Studies on the historical transition from Technical drawings or data for the 110 kV
Modern systems often study "low-frequency oscillations" (LFO), which are voltage instabilities caused by interactions between the power grid and modern train power converters. Likely File Contents low-frequency-16.7z