US 11,307,226 B2Granted

Method for monitoring electrical energy in traction power networks

AssigneeNanjing Institute of Railway Technology

InventorsQihou Song, Honggao Feng, Baichuan Xu

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Abstract

The present invention provides a method for monitoring electrical power in high-speed rail traction power supply networks/systems, comprising: collecting voltage and current analog signals from a traction power supply system, and converting the voltage and current analog signals into voltage and current digital signals; obtaining, by a processing unit, digital signals and transfer commands; compressing, by the processing unit, the digital signals according to the transfer commands to digital signal frames; and constructing a data link between the processing unit and a storage unit and transmitting the compressed digital signal frame to the storage unit. The processing unit may use run-length coding algorithm to compress the digital signal to be stored to obtain several compressed digital signal frames. Under different conditions of data link, transmission of compressed digital signal frames is adjustable to improve the reliability of digital signal transmission.

Claims14

Dependent claims

A method for monitoring electrical power in a high-speed rail traction power supply system, comprising:

collecting voltage and current analog signals from the traction power supply system, and converting the voltage and current analog signals into voltage and current digital signals;
obtaining, by a processing unit, the digital signals and a transfer command;
compressing, by the processing unit, the digital signals to digital signal frames according to the transfer command;
and
constructing a data link between the processing unit and a storage unit and transmitting the compressed digital signal frame to the storage unit, wherein constructing a data link between the processing unit and a storage unit and transmitting the compressed digital signal frame to the storage unit comprises transmitting, by the processing unit, compressed digital signal frames with small weighting factors to the storage unit if transmission speed of the data link is low;
and
transmitting, by the processing unit, compressed digital signal frames with large weighting factors to the storage unit if transmission speed of the data link is high.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/706,816Filed 8 Dec 2019
Priority: CN 201910564136.825 Jun 2019
Published: US 2020/0408813 A131 Dec 2020
Granted: 19 Apr 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

B60L 3/12
Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy…:…
G01R 19/175
Arrangements for measuring currents or voltages or for indicating presence or sign thereof: indicating the instants of passage of current or…
B60L 15/20
Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles: for control of the vehicle or its…
G01R 19/2513
Using digital measurement techniques: arrangements for monitoring electric power systems, e.g. power lines or loads; Logging

Family

US 2020/0408813 A1Pre-grant publication · published 31 Dec 2020
US 11,307,226 B2This patent

From the US filing history. Foreign family members aren’t listed.

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