Power Storage System Control for Electric Rolling Stock Safety
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Solution Overview
Problem
Current power storage systems for electric rolling stock lack specific methods for stable and safe operation, activation, stopping, and abnormality detection and handling, despite recent developments, with existing literature not providing comprehensive solutions for these critical aspects.
Innovation Solution
A power storage system incorporating a breaking unit, current and voltage detecting units, switch units, filter units, a DC-DC converter, and a system control unit that manages these components to ensure stable operation, detect abnormalities, and execute appropriate responses, including discharging capacitors in case of anomalies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a power storage system is implemented in electric rolling stock, then energy efficiency is improved through regenerative braking, but operational safety and stability are compromised due to lack of specific operation methods and abnormality detection mechanisms
Solution Approach 1:
The patent applies preliminary action by establishing comprehensive operation methods before actual power storage system deployment. Specific activation, operation, and stopping procedures are defined in advance, along with abnormality detection mechanisms, ensuring the system operates safely from the outset rather than reacting to problems after they occur.
Solution Approach 2:
The patent implements feedback through abnormality detection mechanisms that continuously monitor the power storage system. When abnormalities are detected, the system provides feedback signals to adjust operation or trigger protective measures, creating a closed-loop control system that maintains safety while maximizing energy efficiency.
2Reliability
If comprehensive abnormality detection and operation control mechanisms are added, then operational safety is improved, but system complexity increases
Solution Approach 1:
The patent applies universality by designing control and detection units that perform multiple functions. The system control unit integrates activation control, operation management, stopping control, and abnormality detection into a single multi-functional device, reducing the number of separate components while maintaining comprehensive safety monitoring.
Solution Approach 2:
The patent merges separate functions into integrated units. The breaking unit, detection units, switch units, and control unit are combined into a coordinated system where the system control unit consolidates multiple control functions, simplifying the overall architecture while ensuring comprehensive safety coverage.
3Stability of the object's composition
If specific operation methods for activation and stopping are established, then operational stability is improved, but device complexity increases due to additional control units and procedures
Solution Approach 1:
The patent applies segmentation by dividing the power storage system into distinct functional units: breaking unit, detection units (current and voltage), switch units (primary and secondary side), filter units, and control unit. This modular segmentation allows each unit to perform its specific function reliably while simplifying the overall control architecture through clear functional separation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables reliable activation, operation, and stopping of the power storage system while effectively detecting and addressing various abnormalities, ensuring safe and efficient use of the power storage system in traction systems.
Implementation Method 1
a DC-DC converter
Implementation Method 2
capacitor provided in a succeeding stage of the noise filter, a discharge element provided in a succeeding stage of the capacitor
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A power storage system capable of surely carrying out activation, operation, and stopping that are crucial and necessary in the use of the power storage system and appropriately addressing various kinds of abnormalities is provided. The power storage system regulates DC power from a DC power supply into prescribed voltage and current using a DC-DC converter unit for storage in a power storage unit. The power storage system includes a primary side current detecting unit, a primary side voltage detecting unit, a primary side switch unit, and a primary side filter unit on the DC power supply side (primary side) of the DC-DC converter, and a secondary side filter unit, a secondary side switch unit, a secondary side voltage detecting unit, and a secondary side current detecting unit on the power storage unit side (secondary side) of the DC-DC converter, and the on/off states of at least the primary side switch unit, the DC-DC converter unit, and the secondary side switch unit are controlled by a system control unit provided with an externally applied operation command and signals obtained from elements such as the primary side current detecting unit and the primary side voltage detecting unit.