Analysing the Voltage Unbalance Impact of Wind Farm on Traction Power Supply System

The voltage unbalance (VU) problem aroused the severe operation accident for wind farm, as the single-phase traction power supply system (TPSS) and wind farm connected to a common busbar. This paper presents a uniform mathematical model to portray the VU transfer between the TPSS of high-speed railway (HSR), wind farm and asymmetric grid. Furthermore, an estimating approach for VUF of TPSS is proposed to illustrate the VU impact of wind farm on TPSS. Finally, the effectiveness of proposed model is verified by a case study, and revealed the reason of how to the wind farm affects VU propagation.