Train Circuit Breaker Controller Speed-Adaptive Dead Section Control
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Solution Overview
Problem
Conventional methods for controlling vacuum circuit breakers in electric trains fail to reliably interrupt the circuit before entering a dead section, particularly when the first vehicle is a powered vehicle, and can cause the train to stop due to circuit interruption during passage through a dead section, especially at varying speeds.
Innovation Solution
A circuit breaker controller that adjusts the circuit interruption position based on train speed, using track antenna beacons and a network of train-information management devices to calculate the optimal off-control position, ensuring reliable interruption before entering the dead section and preventing train stops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit breaker is controlled to interrupt the circuit at a fixed position before the dead section, then the circuit can be interrupted before entering the dead section, but the train may stop in the dead section when traveling at low speed
Solution Approach 1:
The patent applies dynamics by making the circuit breaker control position variable rather than fixed. The control position is dynamically adjusted based on the train's current speed, allowing the system to adapt to different operating conditions. When speed is high, the control position is set further ahead to ensure circuit interruption before the dead section; when speed is low, the control position is adjusted to prevent stopping in the dead section.
Solution Approach 2:
The patent changes the parameter of control position based on the parameter of train speed. By establishing a correspondence relationship between speed and control position, the system adjusts the circuit breaker control position as a variable parameter rather than a fixed value, enabling optimal performance across different speed conditions.
2Reliability
If the circuit breaker control position is set far before the dead section, then circuit interruption is reliable, but the train stops before or in the dead section when speed is low
Solution Approach 1:
The system dynamically adjusts the control position based on real-time speed measurements. The control position is not a static value but varies with speed conditions, allowing the train to maintain optimal operation across different speed ranges while ensuring reliable circuit interruption.
Solution Approach 2:
The patent implements feedback by continuously monitoring train speed and using this information to adjust the circuit breaker control position. The speed detection unit provides real-time feedback to the control unit, which then determines the appropriate control position based on the current speed, creating a closed-loop control system.
3Productivity
If the circuit breaker control position is adjusted for high speed, then the train can pass through without stopping, but circuit interruption may occur after entering the dead section
Solution Approach 1:
The control position dynamically adapts to speed conditions, ensuring that at high speeds the circuit is interrupted early enough before the dead section, while at lower speeds the control position adjusts to maintain safety margins. This dynamic adjustment prevents both premature stopping and post-entry interruption.
Solution Approach 2:
The patent applies beforehand cushioning by setting the control position with a safety margin that accounts for the time lag between control signal issuance and actual circuit interruption. This cushioning ensures that even with the time delay, the circuit will be interrupted before entering the dead section under all operating conditions.
Data Source
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AI summary
To provide a circuit breaker controller for an electric train that can perform circuit interruption reliably before proceeding into a dead section, while preventing a train from stopping due to circuit interruption at a time of passing through the dead section. A circuit breaker controller 100 is mounted on each vehicle of an electric train together with a receiver 13 that detects a track antenna beacon installed at a predetermined position before and after the dead section, to control a circuit breaker 10 provided between a power collector and a main circuit device by detecting the track antenna beacon by the receiver 13. The circuit breaker controller 100 includes a running-position calculation unit 21 that calculates a running position of the vehicle based on a speed of the electric train, a circuit-breaker control-position calculation unit 22 that calculates a circuit-breaker off-control position at which the circuit breaker 10 is off-controlled according to a speed of the electric train at a point in time at which the receiver 13 detects the track antenna beacon installed before the dead section in the traveling direction, and a circuit breaker control unit 23 that executes off-control of the circuit breaker 10 at a point in time at which the running position and the circuit-breaker off-control position match each other.