Pantograph Arc Detection via Booster Transformer
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Solution Overview
Problem
Conventional methods for simulating pantograph-catenary electric arcs in high-speed trains face high energy consumption due to the need for high voltage alternating current power supplies, which destabilize the power system and fail to accurately replicate the high voltage and great current conditions experienced in real operations.
Innovation Solution
A train power supply system utilizing a booster transformer, current limiting resistor, and step-down transformer to generate high voltage and great current in the gap between the catenary wire and pantograph, with a collecting device to capture the electric arc, reducing energy consumption and stabilizing the power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a high voltage alternating current power supply is used to generate high voltage and great current in the pantograph-catenary gap, then the electric arc simulation is accurate, but energy consumption increases and power supply stability deteriorates
Solution Approach 1:
The patent employs periodic switching of the power supply system, alternating between high voltage/great current mode for arc generation and low voltage/small current mode for energy conservation. The controller periodically switches the switching element to control the power supply output, achieving accurate arc simulation only when needed while reducing overall energy consumption and maintaining power supply stability
Solution Approach 2:
The patent dynamically changes power supply parameters (voltage and current levels) based on testing requirements. The power supply system can switch between different operating states: high voltage and great current for arc simulation, and low voltage and small current for normal operation, thereby resolving the contradiction between simulation accuracy and energy consumption
2Measurement precision
If a high voltage alternating current power supply is used to generate high voltage and great current in the pantograph-catenary gap, then the electric arc simulation is accurate, but power supply stability deteriorates
Solution Approach 1:
The controller periodically switches the power supply between high voltage/great current mode and low voltage/small current mode. During normal operation, the system maintains stable low power output, and only periodically transitions to high power mode when arc simulation is required, thus maintaining overall power supply stability while achieving accurate arc simulation when needed
Solution Approach 2:
The power supply system incorporates automatic control mechanisms that monitor system state and automatically adjust output parameters. The controller detects when arc simulation is needed and autonomously switches to high voltage/great current mode, then returns to stable low power mode afterward, eliminating the need for manual intervention and maintaining system stability
3Use of energy by moving object
If a low voltage and great current power supply or a high voltage and a small current power supply is employed, then energy consumption is reduced, but the simulation accuracy deteriorates due to inability to replicate high voltage and great current conditions
Solution Approach 1:
The patent employs a dynamic power supply system that can adaptively change its output characteristics based on real-time testing requirements. The system transitions from static low power operation to dynamic high voltage/great current operation when arc simulation is needed, ensuring both energy efficiency during normal operation and simulation accuracy when required
Solution Approach 2:
The controller dynamically adjusts power supply parameters (voltage and current) based on testing needs. The system maintains low voltage and small current during normal operation to conserve energy, then switches to high voltage and great current mode when pantograph-catenary arc simulation is required, thereby resolving the contradiction between energy consumption and simulation accuracy
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 effectively reduces energy consumption and power demand, providing a stable and reliable power supply that accurately simulates the high voltage and great current conditions, reflecting the features of pantograph-catenary electric arcs while minimizing the impact on the power grid.
Implementation Method 1
boosting, by the booster transformer, a voltage of alternating current transmitted via the electric network, to generate high voltage electrical energy
Implementation Method 2
an electric arc generated in the gap between the catenary wire and the pantograph in a case of the high voltage and the great current
Data Source
AI summary
A method and a system for detecting a pantograph-catenary electric arc based on a train power supply system are provided. The method includes: boosting, by a booster transformer, a voltage of alternating current transmitted via an electric network, to generate high voltage electrical energy, where a high voltage and a great current are generated in a gap between a catenary wire and a pantograph in a discharging circuit with the high voltage electrical energy; and collecting an electric arc generated in the gap between the catenary wire and the pantograph in a case of the high voltage and the great current.