Electric locomotive power factor compensation control method and device

Abstract

The invention discloses a power factor compensation control method of an electric locomotive and a device thereof. According to the detection of network voltage and the current flowing into the locomotive, spectral analysis is carried out; by reading active power and reactive power, a power factor is calculated; and then the switching of a power compensation branch is decided according to the power factor and the network voltage; according to the voltage polarity of a thyristor switch of the power compensation branch, the switch pulse of the thyristor is decided; by collecting the current of the branch and making spectral analysis, whether the current is overcurrent or not is judged; if the current is overcurrent, the reasons thereof can be analyzed and relevant protective measures can be taken; and then information on the working state of a power factor compensation device, the network voltage, the current of the locomotive, the current of each branch can be transmitted to a locomotive microcomputer monitor by a communication mouth and displayed by the monitor. The power compensation control device consists of two 6U board plug-ins. One 6U board plug-in is an interface board which comprises a treatment part of an input / output analog signal and a digital signal; the other 6U board plug-in is a control board which comprises a power calculation part of the active power and the reactive power, a switching part of a power factor compensation branch and a failure treatment part.

Description

technical field [0001] The invention relates to a control method and device for electric locomotive traction equipment, in particular to a power factor compensation control method and device for electric locomotive traction equipment, which are mainly used in the control of electric traction equipment for electric locomotives. Background technique [0002] In China, AC / DC drive electric locomotives are still the main type of railway passenger and freight vehicles, and the number of them is huge and will coexist with AC / DC / AC drive electric locomotives for a long period of time. However, the AC / DC drive electric locomotives currently on the market use phase-controlled rectification circuits, and the power factor is generally lower than 0.85 during operation, which will transmit a large amount of reactive power and harmonic current to the grid. The power factor compensation (hereinafter referred to as "power compensation") device installed on the AC / DC drive electric locomotiv...

AI Technical Summary

Problems solved by technology

[0011] The object of the present invention is to provide a vehicle-mounted power factor compensation control method and device for improving the power factor in view of the low power factor of the existing vehicle-mounted power compensation device

To solve the historical problem that the existing power compensation devices of thousands of locomotives cannot be used, ensure the improvement of locomotive power factor, improve the reliability of locomotives, reduce the energy consumption of electrified lines, and improve the quality of power grids

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