Automatic Train Operation Traction Distribution for Energy-Saving Control

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Solution Overview

Problem

Existing automatic train operation systems face challenges in accurately selecting optimal speed curve models due to deviations in train energy consumption models, leading to inefficiencies in energy-saving effects, especially on tracks with strict speed requirements.

Innovation Solution

A control method for automatic train operation systems that involves acquiring multiple traction distribution strategies, calculating performance indices for each, determining an optimal strategy based on these indices, and controlling the system accordingly to optimize traction distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If a train energy consumption model is used to select the optimal speed curve model, then the selection process is automated, but the model deviates greatly from actual energy consumption, resulting in poor energy-saving effect

Engineering Contradiction:
Improveautomation of optimal speed curve selectionVSAvoidaccuracy of energy consumption model
Core Design Contradiction:
Extent of automationVSMeasurement precision

Solution Approach 1:

The patent applies feedback by using actual train operation data (traction current, speed, position) to continuously evaluate and update the performance of different traction distribution strategies. The system calculates actual energy consumption based on measured parameters and uses this feedback to determine the optimal strategy, closing the loop between model prediction and real-world performance.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent changes the approach from using a fixed energy consumption model to dynamically evaluating multiple traction distribution strategies based on actual operational parameters. It calculates performance indices using real-time data including traction current, speed, and position, rather than relying on a predetermined model that may not reflect actual conditions.

Inventive Principle:
Principle #35Parameter changes

2Device complexity

If a fixed optimal speed curve model is selected, then the control system is simplified, but the model is not applicable to track sections with strict speed requirements, affecting energy-saving effect

Engineering Contradiction:
Improvesimplicity of control systemVSAvoidadaptability to different track sections
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamics by making the optimal traction distribution strategy adaptable to different track sections and operating conditions. Instead of using a fixed speed curve model, the system dynamically evaluates multiple strategies based on actual train operation data and selects the optimal one for each specific section, allowing the control system to adapt to varying speed requirements and track characteristics.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent creates a universal evaluation framework that can handle different track sections and speed requirements through a single adaptive system. The performance index calculation method is universally applicable to various operating conditions, evaluating traction distribution strategies across different scenarios including sections with strict speed requirements, thereby providing multi-functionality without requiring separate control systems for each case.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Device complexity

If traditional speed curve models are used for automatic train operation, then the system structure is simple, but the energy-saving effect is insufficient due to model deviations

Engineering Contradiction:
Improvesimplicity of system structureVSAvoidenergy consumption during train operation
Core Design Contradiction:
Device complexityVSLoss of energy

Solution Approach 1:

The patent uses feedback mechanisms to continuously monitor actual train operation parameters (traction current, speed, position) and compare them with planned values. This feedback loop enables the system to calculate actual energy consumption and adjust the traction distribution strategy to minimize energy loss, thereby improving energy-saving effect while maintaining a relatively simple system structure through existing sensors and controllers.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent changes the approach from using fixed speed curve models to dynamically optimizing traction distribution based on actual operational parameters. By calculating performance indices using real-time data including traction current, speed, and position, the system identifies strategies that actually minimize energy consumption in practice, rather than relying on theoretical models that may not reflect real-world energy usage patterns.

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS12448016B2Energy-saving control method for automatic train operation, and related device and readable storage medium
Publication Date: 2025.10.21 CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO LTD
  • US12448016B2 patent drawing
  • US12448016B2 patent drawing
  • US12448016B2 patent drawing

AI summary

Provided are a control method, apparatus and device for an automatic train operation system. The method includes: acquiring multiple preset traction distribution strategies; determining, for each traction distribution strategy, a performance index of the traction distribution strategy; determining an optimal traction distribution strategy based on performance indexes of the multiple traction distribution strategies; and controlling the automatic train operation system based on the optimal traction distribution strategy.