A multi-station cooperative unbalance compensation method for high-speed railway

Abstract

The invention discloses a multi-station cooperative unbalance compensation method for a high-speed railway, which uses a group of traction substations that take turns commutating as a whole to perform unbalance compensation, and each traction substation includes a compensation device for unbalance compensation, and each compensation device The power supply end of the power supply leads to the traction grid; each compensation device is controlled by a slave controller, and each slave controller exchanges information with the master controller, so as to realize the collaborative compensation of multiple stations. The present invention is more suitable for the occasion of multi-station cooperative compensation, and can use the compensation devices of each station to work together to compensate the negative-sequence imbalance when any one or more stations in the multi-station has a negative-sequence imbalance. The principle of the method is simple and flexible , fast processing speed, suitable for practical applications.

Description

technical field [0001] The invention belongs to the technical field of traction power supply for high-speed railways, and in particular relates to a multi-station cooperative unbalance compensation method for high-speed railways. Background technique [0002] The load of high-speed railway electric locomotives causes unbalanced three-phase currents and negative sequence currents. The negative sequence current brings additional loss to the generator, causing rotor heating and additional vibration, which seriously affects the safe and stable operation of the power system. Locomotive harmonics bring extra power loss to electric equipment, cause relay protection devices to malfunction or refuse to operate, and reduce the reliability of the power system. Therefore, the imbalance problem of high-speed railway power supply system has been widely concerned. [0003] At present, the research on the compensation method of negative-sequence unbalance of high-speed railway is mainly a...

AI Technical Summary

Problems solved by technology

The specific action object of the multi-station cooperative compensation method based on the RPC compensation principle is the six traction power supply arms of the three traction substations; when performing multi-station collaborative compensation, how much active power is balanced by each traction power supply arm of each station, and how much is compensated? Reactive power requires more complex calculations and analysis, and the control is also more cumbersome. Since collaborative control has high requirements for real-time performance, the effect is not ideal in practical applications.

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