Locomotive traction converter network voltage fluctuation composite detection control device and control method thereof

Abstract

The invention relates to locomotive traction converter network voltage fluctuation control, in particular to a locomotive traction converter network voltage fluctuation composite detection control device and a control method thereof. The invention provides the locomotive traction converter network voltage fluctuation composite detection control device and the control method thereof to solve the problems and defects existing in an existing locomotive traction converter network voltage fluctuation detection control method. The method is realized through four-quadrant rectifier control software.The voltage outer loop of the control device is changed into a sliding mode controller from a traditional PI controller, and a multiple control algorithm is further added, so that on one hand, the network voltage jump quantity can be quickly controlled when network voltage fluctuation is detected, and on the other hand, the pollution of alternating-current side current harmonics to a power grid isreduced. The robustness and the anti-interference capability of a control system are improved; faults of a locomotive high-voltage system, a traction system, an auxiliary system and the like cannot be caused when network voltage fluctuation occurs; thus safe and stable operation of a train is guaranteed.

Description

technical field [0001] The invention relates to network voltage fluctuation control of locomotive traction converters, in particular to a compound detection control device and control method for network voltage fluctuations of locomotive traction converters. Background technique [0002] With the increase of my country's railway operating mileage year by year, the railway traction power supply system is getting larger and larger, and new models are constantly emerging, and some new problems have emerged in the operation process. The network voltage fluctuation caused by harmonics is caused by the unreasonable matching of electrical coupling parameters between the locomotive / EMU and the power supply system. It is usually related to high harmonic content and system capacitive equipment, which will cause high voltage, Failure of traction, auxiliary systems, etc. Low-frequency grid voltage fluctuations and the continuous amplification of grid voltage are mostly caused by defect...

AI Technical Summary

Problems solved by technology

[0005] The invention solves the problems and defects existing in the existing method for detection and control of network voltage fluctuations of locomotive traction converters, and provides a compound detection and control device for network voltage fluctuations of locomotive traction converters and its control method

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