Novel railway uninterruptible phase-separation passing and power quality compensation device for double-line traction network

Abstract

Overvoltage and overcurrent problems during passing phase-separation and negative sequence current penetration problem are the critical problems in high speed, heavy duty electrified railways, which greatly constrants the safe operation of railway and safety and stability of power system.A novel uninterruptible phase-separation passing and power quality compensation scheme for double-line traction network is proposed in this paper.System configuration, working principle and control strategies are studied.Typical operating modes are designed with the composition of the condition that whether there is locomotive passing neutral section and simulations under various operation modes are carried out in PSCAD.Results show that the proposed scheme can help locomotives from two elirections passing phase-separation without loss of power simultaneously one locomotive passing neutral section to ensure optimal power quality.

Keywords

• electrified railway
• traction substation
• uninterruptible phase-separation passing scheme
• power quality compensation