Railway Vehicle Power Management for Traction-Priority Auxiliaries

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Solution Overview

Problem

Existing railway vehicles face inefficiencies in managing power consumption due to varying voltage and current demands from energy supply lines, leading to significant voltage drops and ohmic losses, which are not adequately addressed by current energy management systems.

Innovation Solution

A centralized power management system using a central control unit within the train control and monitoring system (TCMS) prioritizes the operation of auxiliary devices based on total available electrical power, considering traction demands and energy supply line conditions, allowing selective reduction of energy consumption when needed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If auxiliary devices operate at full power continuously, then passenger comfort and device functionality are maintained, but energy consumption increases and voltage drops occur on the energy supply line

Engineering Contradiction:

Improvedevice functionalityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic power management where the central control unit continuously monitors traction power demand and available electrical power, then dynamically adjusts auxiliary device operation modes. Auxiliary devices switch between different power levels or operational states based on real-time energy availability, resolving the contradiction between maintaining device functionality and reducing energy consumption.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes operational parameters of auxiliary devices based on energy supply conditions. When electrical power is abundant, auxiliary devices operate at full capacity; when power is limited due to high traction demand, the central control unit reduces auxiliary power consumption by adjusting operational parameters such as HVAC cooling/heating rates, lighting intensity, or infotainment power levels.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If multiple auxiliary devices operate simultaneously at high power, then service quality is improved, but voltage drops on the energy supply line increase which may halt the train

Engineering Contradiction:

Improveservice qualityVSAvoidvoltage stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The central control unit implements a feedback mechanism that continuously monitors the electrical power available from the energy supply line and the traction power demand. Based on this feedback, the system adjusts auxiliary device operation to maintain voltage stability. When voltage drops are detected or predicted, the system automatically reduces auxiliary power consumption to prevent train halt, thus maintaining both service quality and voltage stability.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary assessment of available electrical power before allowing auxiliary devices to operate at high power levels. The central control unit predicts future power availability based on traction demand patterns and energy supply line conditions, proactively adjusting auxiliary device operation to prevent voltage drops before they occur, ensuring continuous reliable operation.

Inventive Principle:

Principle #10Preliminary action

3Power

If the railway vehicle draws high current from the energy supply line, then traction performance is improved, but ohmic losses in the energy supply line increase causing voltage drops

Engineering Contradiction:

Improvetraction powerVSAvoidohmic losses

Core Design Contradiction:

PowerVSLoss of energy

Solution Approach 1:

The patent applies partial action by reducing auxiliary device power consumption during periods of high traction demand. Instead of maintaining full auxiliary power operation, the system deliberately operates auxiliary devices at reduced power levels or in energy-saving modes when high current draw is required for traction, thereby reducing overall energy losses in the supply line while maintaining essential train operations.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12583431B2Method for managing power consumption of a railway vehicle, and railway vehicle with improved power consumption management

Publication Date: 2026.03.24 BOMBARDIER TRANSPORTATION GMBH

AI summary

A method for managing power consumption of a railway vehicle is provided. The power consumption of the railway vehicle is managed by a central control unit that receives information representing an amount of electrical traction power required for traction or generated by electrodynamic braking based on a traction demand set by the driver of the railway vehicle. The central control unit additionally receives information representing an amount of electrical auxiliary power demanded by auxiliary devices from control units of the respective auxiliary devices. The total available electrical power, which can be provided by the energy supply line for the railway vehicle, is determined. The central control unit prioritizes operation of the auxiliary devices based on the total available electrical power and the electrical traction power required for traction to selectively reduce consumption of electrical energy by all or selected auxiliary devices.