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 pro

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