Simulation of Devices for Voltage Regulation in 25 kV AC Electric Traction Network

摘要

This paper proposes a MATLAB/Simulink simulation model aimed at energy efficiency estimation of different devices for voltage regulation in the AC traction network. The electrified railroad section with the length of 40 km is modelled. The model contains blocks of high-voltage power supply, a high-voltage overhead line, symmetrical three-phase load, power transformers with on-load tap changer (OLTC), an overhead line, rails, and electric rolling stock and device with booster transformer (BT). The model allows to estimate a technical loss in all elements of the power supply system. The operating regime is simulated with the three-phase and single-phase load combination and different devices for voltage regulation. The speed of trains is 50 km/h, the train interval is 10 min. The total technical loss when applying of transformer OLTC is 12.08% more than for the option without adjustment, due to an increase in losses in the overhead line. The use of a device with BT will reduce annual losses by 2.06%.