Method and device for predicting capacitance value of DC support capacitor

Abstract

The embodiment of the present invention discloses a method and a device for predicting the capacitance value of a DC support capacitor. In this method, a preset combined neural network model is used to duplicate the data to be tested to obtain duplicate data, and one of the data to be tested and the duplicate data is input into the first long short-term memory network to obtain the first time correlation feature, and the other input To the first convolutional neural network to obtain the first spatial correlation feature, input the first temporal correlation feature to the second long short-term memory network to obtain the second temporal correlation feature, and input the first spatial correlation feature to the second volume The second spatial correlation feature is obtained by integrating the neural network, and the second time correlation feature and the second spatial correlation feature are input to the fully connected layer to obtain the capacitance prediction value of the DC support capacitance. In the present invention, the predicted capacitance value of the DC support capacitor is obtained based on the preset combined neural network model prediction, which can meet the needs of real-time monitoring of the capacitance value of the rail vehicle.

Description

technical field [0001] The present invention relates to the technical field of capacitance measurement, and in particular, to a method and device for predicting the capacitance value of a DC support capacitor. Background technique [0002] At present, the DC support capacitor of the rail vehicle is an important component of the traction system, and the real-time measurement of the capacitance value is required to ensure the stable operation of the rail vehicle. [0003] Existing hardware-based capacitance value measurement methods, such as special instrument measurement method, AC impedance calculation method, and dual voltmeter method, all need to remove the capacitance to be measured separately, or build a special test circuit based on test requirements, and use related Professional equipment measures the capacitance value of the capacitor. [0004] The above method of removing the capacitors alone is complicated to operate, and because the traction system of the rail veh...

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Problems solved by technology

[0004] The above-mentioned method of separately removing the capacitors is complicated to operate, and because the traction system of rail vehicles is very complex and precise, each part of the traction system interacts and interacts, and the various types of sensors included in the traction system make the recorded data complex and massive. It is very difficult to use a similar test circuit to measure the capacitance of the DC support capacitor in the traction system, and it takes a long time, which makes the measurement cost high and the measurement time is long. It can be seen that the capacitance measurement method in the prior art is difficult to adapt to The need for real-time monitoring of capacitance values ​​of rail vehicles

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