WO-2026092194-A1 - INTELLIGENT SWITCHING CONTROL METHOD FOR POWER SOURCE OF INTERNAL COMBUSTION AND ELECTRIC DUAL-SOURCE LOCOMOTIVE, APPARATUS AND MEDIUM

WO2026092194A1WO 2026092194 A1WO2026092194 A1WO 2026092194A1WO-2026092194-A1

Abstract

An intelligent switching control method for power sources of an internal combustion and electric dual-source locomotive, comprising: capturing an image ahead of a traveling locomotive (S1); performing feature extraction on the image to determine marker features (S2); and, on the basis of the marker features, controlling a power supply system to switch a power source so as to supply power to a power grid or a generator driven by an internal combustion engine, such that a traction motor obtains power from the power supply system to drive the locomotive (S3).

Inventors

YANG, SHOUJUN
ZHANG, YANMIN
ZHAO, XIN
LIU, SIJIA
XU, Chaolin
JIA, Feng
TIAN, Guangxing
SHI, Pengfei
LI, WENBO

Assignees

中车大连机车车辆有限公司

Dates

Publication Date: 20260507
Application Date: 20251017
Priority Date: 20241101

Claims (13)

A method for intelligent switching control of internal and external dual-source locomotive power sources includes: Capture images of the area in front of the locomotive; Feature extraction is performed on the image, and marker features are determined; Based on the characteristics of the marker, the power supply system is controlled to switch between grid power and generator power driven by the internal combustion engine, so that the traction motor obtains power from the power supply system to traction the locomotive.
According to the intelligent switching control method for dual-power locomotives (internal and external), as described in claim 1, the step of extracting features from the image and determining marker features includes: Extract the bounding box features of objects in the image; Calculate the adjacent spatial distance between multiple similar rectangular bounding box features; In response to the fact that the difference in adjacent spatial distances between multiple similar rectangular frame features is less than a first preset threshold, the multiple similar rectangular frame features are determined to be landmark features, and the locomotive is determined to be traveling on an electrified route.
According to the intelligent switching control method for dual-power locomotive systems (internal and external), as described in claim 2, the step of extracting features from the image and determining marker features further includes: If the number of landmark features in the image is less than a second preset threshold, it is determined that the locomotive is traveling on a non-electrified route.
According to the intelligent switching control method for dual-source locomotive power supply as described in claim 3, the method of controlling the power supply system to switch between grid power supply and generator power supply driven by the internal combustion engine based on the characteristics of the marker includes: Based on the characteristics of the markers, determine the pre-driving route of the locomotive after traveling a preset distance ahead; In response to the pre-driving route being switched to an electrified route, the pantograph is sequentially controlled to be raised from a lowered position to connect to the power grid, the main circuit is switched from open to closed to allow the power supply system to be electrically connected to the pantograph, the internal combustion engine is switched from starting to stopping, and the generator is disconnected from supplying power to the power supply system. In response to the pre-driving route switching to a non-electrified route, the internal combustion engine is sequentially controlled to start from a standstill, the generator resumes power supply to the power supply system, the pantograph is raised and lowered to disconnect from the power grid, and the main circuit breaker is closed and opened to disconnect the power supply system from the pantograph.
The intelligent switching control method for dual-source locomotive power (internal and external) as described in claim 4 further includes: During the process of starting the internal combustion engine to generate electricity, the internal combustion engine is controlled to accelerate to a first speed and then the generator is excited. The high-temperature water temperature of the internal combustion engine is acquired in real time, and in response to the high-temperature water temperature being greater than a preset temperature threshold, the pantograph is sequentially controlled to change from raising to lowering to disconnect from the power grid, and the main circuit is changed from closing to opening to disconnect the power supply system from the pantograph.
The intelligent switching control method for dual-source locomotive power (internal and external) as described in claim 5 further includes: In response to the main disconnection, the internal combustion engine is controlled to reduce its speed to the second speed.
The intelligent switching control method for dual-source locomotive power (internal and external) as described in claim 5 further includes: Before the internal combustion engine stops, the four-quadrant rectifier unit in the power supply system is started, and the power grid power introduced by the pantograph is gradually increased through the four-quadrant rectifier unit. The generator is controlled to gradually reduce load, disconnect excitation, and stop the internal combustion engine.
According to any one of the methods for intelligent switching control of internal and external electric locomotive power sources as described in claims 1-7, the method further includes the following manual switching process: Before identifying the characteristics of the marker and preparing to automatically switch the power source, a power mode switching prompt is displayed on the main unit interface. After a preset delay, the power source is automatically switched, and control of the main unit operating handle is locked. In response to the extreme position change of the host operating handle within the preset delay, the automatic power source switching mode is exited and the manual switching mode is switched. Once the host interface displays a message indicating that the power mode switch was successful or the system has switched to manual mode, control of the host control handle is restored.
The intelligent switching control method for dual-source locomotive power (internal and external power) according to claim 8 further includes: In response to an automatic switching mode failure, a hardware soft switch is used to force a switch to manual switching mode. In response to a manual switching mode failure, the function is forcibly switched to automatic switching mode by starting the software switch on the main control screen.
According to the intelligent switching control method for dual-source locomotive power (internal and external power) as described in claim 8, the manual switching mode further includes: Control the hybrid power supply that simultaneously provides power from internal combustion engines and from the power grid.
A dual-power locomotive power source intelligent switching control device, comprising: The image capture module is configured to capture images of the area in front of the locomotive as it travels. The feature extraction module is configured to extract features from the image and determine the features of the markers. The switching control module is configured to control the power supply system to switch between grid power supply and generator power supply driven by internal combustion engine based on the characteristics of the marker, and to enable the traction motor to obtain power from the power supply system to traction the locomotive.
A computer device, comprising: At least one processor; and A memory storing a computer program that can run on the processor, wherein the processor executes the program to implement the intelligent switching control method for the dual power sources of an internal and external locomotive as described in any one of claims 1-10.
A computer-readable storage medium storing a computer program that, when executed by a processor, implements the intelligent switching control method for dual-source locomotive power supply as described in any one of claims 1-10.

Description

Intelligent switching control method, device and medium for dual-power locomotives (internal and external) This application claims priority to Chinese Patent Application No. 202411554674.6, filed with the Chinese Patent Office on November 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field This application relates to the field of intelligent locomotive control, such as a method, device, and medium for intelligent switching control of internal and external dual-power locomotive power sources. Background Technology Traditional dual-power locomotives employ a dual-engine external coupling system, consisting of a diesel-powered car and an electric-powered car, forming an external coupling control mechanism. For example, in Chinese patent application number 115503766A, "A Power Source Conversion Control Method for Dual-Source Power Centralized EMU," the power source conversion control method includes: collecting two feedback signals from the control terminal and the EMU's operating speed; determining whether a power mode conversion request exists by monitoring whether the two feedback signals from the control terminal change; determining whether the EMU's operating speed is zero if a power mode conversion request exists; when the EMU's operating speed is zero, unconditionally and directly performing a power mode conversion based on the two collected feedback signals; when the EMU's operating speed is not zero, lowering the pantograph or disconnecting the motor control switch according to the power mode before conversion, and then performing a power mode conversion. The traditional dual-engine external coupling method has the following disadvantages: 1. Failed to truly integrate internal electric power source; 2. The driver needs to manually operate the vehicle to switch power sources according to the route conditions, which requires a high level of driver attention and can easily lead to driver fatigue. Summary of the Invention To improve the safety of locomotive operation and reduce driver fatigue, this application proposes an intelligent switching control method for dual power sources (internal combustion and electric) in locomotives. The method includes: capturing an image of the locomotive ahead; extracting features from the image and determining landmark features; and controlling the power supply system to switch between grid power and generator power driven by the internal combustion engine based on the landmark features, so that the traction motor obtains power from the power supply system to traction the locomotive. In some embodiments, feature extraction and determination of landmark features of the image include: extracting rectangular box features of objects in the image; calculating the adjacent spatial distance between multiple similar rectangular box features; and determining the multiple similar rectangular box features as landmark features in response to the difference between adjacent spatial distances of multiple similar rectangular box features being less than a first preset threshold, and determining that the locomotive is traveling on an electrified route. In some embodiments, feature extraction of the image and determination of landmark features further includes: determining that the locomotive is traveling on a non-electrified route in response to the number of landmark features in the image being less than a second preset threshold. In some embodiments, controlling the power supply system to switch between grid power supply and generator power supply driven by an internal combustion engine based on the characteristics of the marker includes: determining the pre-driving route after a preset distance ahead of the locomotive based on the characteristics of the marker; in response to the pre-driving route switching to an electrified route, sequentially controlling the pantograph to rise from a lowered position to connect to the grid, the main circuit breaker to close from an open position to electrically connect the power supply system to the pantograph, the internal combustion engine to stop from starting, and the generator to disconnect from the power supply system; in response to the pre-driving route switching to a non-electrified route, sequentially controlling the internal combustion engine to start from a stopped position, the generator to resume power supply to the power supply system, the pantograph to lower from a raised position to disconnect from the grid, and the main circuit breaker to open from a closed position to disconnect the power supply system from the pantograph. In some embodiments, the intelligent switching control method for dual-source locomotive power sources of this application further includes: during the starting and power generation process of the internal combustion engine, controlling the internal combustion engine to accelerate to a first speed and then stimulating the generator; acquiring the high-temperature water tem