Zhigang Liu

Electric trains in the mountains are like voracious dragons: when they accelerate, they suddenly suck energy from the grid, fed by sun and wind, causing voltage spikes. This voracity threatens chaos for the weak mountain power system.

The railway overhead contact line resembles a galaxy: energy flows through it like gravity, with trains becoming planets. The more trains draw current simultaneously, the stronger the voltage fluctuations — gravitational waves ripple through the system, threatening blackouts.

The railway's electrical network is like an orchestra: trains are musicians whose systems respond differently to current. When their 'electric voices' fall out of tune, disorder arises — a cacophony that can escalate into dangerous voltage rocking.