Electrified railway in-phase power supply device and multi-target coordinated instantaneous current control method

Abstract

The invention relates to an electrified railway in-phase power supply device and a multi-target coordinated instantaneous current control method adopted by the device. After the in-phase power supply device is used, the electrified railway whole-line in-phase power supply can be realized, the output power of two power supply arms of a traction transformer can be balanced, and the negative sequence problem can be thoroughly solved; the load reactive power and the harmonic current can be compensated, and the electric energy quality of a traction power supply system can be comprehensively improved; the voltage of a traction electric network can be stabilized, the transient state stability of the voltage can be improved, the power supply distance of the power supply arms can be increased, and the amount of power substations can be reduced; the electrified railway in-phase power supply device and the multi-target coordinated instantaneous current control method are multiple in targets, the multi-target can be simultaneously controlled, the control harmony at two sides can be guaranteed, the dynamic response capability is stronger; a rectification side inverter takes the active power transfer and the stable direct voltage as a control target, and participates the reactive power control; and an inversion side inverter performs active power, reactive power and harmonic wave control, and participates the stable control of the direct voltage.

Description

technical field [0001] The invention relates to an electrified railway in-phase power supply device and a multi-objective coordinated instantaneous current control method adopted. Background technique [0002] At present, my country's traction power supply system adopts a different-phase (two-phase) unilateral power supply mode. The unilateral power supply mode and the existing traction substation wiring mode and its commutation connection determine that there must be an electrical phase separation link on the traction network. When the automatic phase separation device on the ground fails, the train will break through the phase separation link; while the automatic phase separation device on the train fails, it will affect the operation of the locomotive. The electric phase separation link has a great restrictive effect on high-speed and heavy-duty traffic. At the same time, problems such as negative sequence and harmonics will become more serious under high-speed and heavy ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a multi-objective coordinated instantaneous current control method for in-phase power supply devices of electrified railways to solve the problem that the existing traction converter control methods have relatively few control targets, relatively simple control strategies, and cannot be applied to in-phase power supply devices problem, and provides a same-phase power supply device for electrified railways using the method

Images