Rail Vehicle Power Management via Local Units
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Solution Overview
Problem
Conventional power management systems in rail vehicles require significant effort to adapt to changes in train configuration and power supply unit failures, as they are designed to manage power distribution based on static train compositions, leading to inefficiencies and potential service disruptions.
Innovation Solution
A power management system with local and vehicle-wide management units that allow for dynamic power distribution by reporting performance parameters from consumer units, enabling automatic adjustments to power allocation and decoupling from train configuration changes, and prioritizing power allocation among consumers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static load management is used based on specific train configuration, then power distribution is stable and manageable, but the system requires significant effort to adapt when train composition changes and cannot respond dynamically to power supply unit failures
Solution Approach 1:
The power management system is segmented into multiple independent power management units, each responsible for a specific consumer unit. Each unit autonomously manages its assigned consumers based on received power data, eliminating the need for a complex centralized management strategy that must account for all possible train configurations. This segmentation allows the system to adapt to configuration changes without increasing overall complexity.
Solution Approach 2:
The system transitions from static load management to dynamic power management by continuously receiving performance data from power supply units and automatically adjusting power distribution in real-time. The power management units dynamically adapt to train composition changes and power supply failures without requiring manual intervention or complex pre-programmed strategies for different configurations.
2Reliability
If total power of auxiliary converters is designed to match maximum consumer power requirement, then all consumers can be supplied at full power, but the system cannot operate when power supply units fail
Solution Approach 1:
The system implements continuous feedback by having power supply units transmit their actual performance data (available power) to power management units. These management units use the feedback information to dynamically calculate and adjust the maximum available power for each consumer unit, ensuring reliable operation even when some power supply units fail. The feedback loop enables the system to adapt to changing power availability in real-time.
Solution Approach 2:
The system changes the operational parameters of consumers dynamically based on available power. When power supply units fail, the power management units adjust the maximum available power parameters for affected consumer units, allowing the system to maintain reliable operation with reduced power rather than shutting down entirely. This parameter adjustment enables flexible power utilization efficiency under varying operational conditions.
3Ease of operation
If power management is centralized and aware of all consumer units, then comprehensive power distribution control is achieved, but the system requires manual adaptation effort when train composition changes
Solution Approach 1:
The power management units operate autonomously, receiving performance data from power supply units and automatically determining power distribution for their assigned consumer units. The system serves itself by automatically detecting train composition changes through the data communication network and adjusting power management strategies without requiring manual intervention. This self-service approach eliminates time loss associated with manual adaptation while maintaining ease of operation.
Data Source
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AI summary
The invention relates to a power management device for a rail vehicle (10) which has a plurality of load units (20.1-20.10), which each comprise one or more electrical loads (22) and are supplied by a plurality of power supply units (14.1, 14.5, 14.8, 14.10). In order to achieve a simple and flexible adaptation of a power management strategy to a variable train composition, the invention proposes that the power management device is provided with a set of local power management units (28.1-28.10), which are each assigned to at least one load unit (20.1-20.10), and a vehicle-wide power management device (30), which, in operation, receives power data of the power supply units (14.1, 14.5, 14.8, 14:10) and is provided for data communication with the local power management units (28.1-28.10) at least on the basis of the power data.