Reversible Traction Substation Dynamic Converter Control
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Solution Overview
Problem
Existing reversible traction substations for railway vehicles have fixed energy efficiency characteristics during system design, which do not adapt dynamically to changing operating conditions, leading to suboptimal energy transfer and regeneration efficiency.
Innovation Solution
A method for automatically optimizing the operating point of the converter in reversible traction substations based on real-time operating parameters, using a programmable computer and sensors to adjust configuration parameters and switch between traction and braking modes efficiently, optimizing energy transfer and regeneration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the converter operates in traction mode with fixed configuration parameters, then the substation can deliver power to the line, but the energy efficiency is suboptimal because the operating point cannot adapt to changing conditions
Solution Approach 1:
The patent applies dynamics by making the configuration parameters of the converter dynamic rather than fixed. The control unit continuously adjusts the operating point of the converter based on real-time monitoring of system conditions such as line voltage, current, and power demands. This allows the substation to adapt its traction and braking characteristics dynamically, optimizing energy efficiency for each specific operating condition rather than relying on predetermined fixed parameters.
2Loss of energy
If the converter operates with fixed traction and braking characteristics, then the system is simple to control, but the energy transfer efficiency and regeneration efficiency are suboptimal
Solution Approach 1:
The patent implements feedback control by continuously monitoring the actual operating conditions of the railway power supply system, including line voltage, current, and power flow measurements. The control unit compares these measured values with reference values and automatically adjusts the converter's configuration parameters to optimize performance. This closed-loop feedback mechanism enables real-time optimization of energy transfer and regeneration efficiency without requiring complex manual intervention or predetermined fixed characteristics.
3Productivity
If the substation uses fixed configuration parameters during design, then the system is easier to deploy, but the operating point cannot be optimized for different operational scenarios
Solution Approach 1:
The patent applies parameter changes by dynamically modifying the configuration parameters of the converter based on actual operating conditions rather than using fixed design-time parameters. The control unit adjusts key parameters such as the traction characteristic and braking characteristic curves in real-time based on monitored system state. This allows the substation to optimize its performance for different operational scenarios including varying train loads, speeds, and regeneration demands, thereby improving energy recovery efficiency without complicating the deployment process.
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
This approach dynamically improves energy efficiency by adjusting the operating characteristics of the substation in response to current conditions, enhancing both power delivery and energy recovery efficiency.
Implementation Method 1
the converter being activatable to operate either as a rectifier to route electrical power from the network to the line to supply electrical energy to a vehicle
Implementation Method 2
route electrical power from the network to the line to supply electrical energy to a vehicle
Implementation Method 3
as an inverter, so as to route electrical power from the line to the network to recover electrical energy from a vehicle
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The method (100) involves determining (114,122,124,126) a current value of mode of operation to privilege from values of multiplicity of operating parameters of sub-station. The job function of tweaking which depends on current value of operating process to privilege is maximized (150). The values optimizes of a multiplicity of configuration settings of sub-station is calculated (160) from values maximizes the sizes of operation. The values optimizes of the parameters of configuration is sauvegardees as current values of configuration settings to order sub-station. Independent claims are included for the following: (1) a recording medium storing program for tweaking of operation of reversible sub-station of traction of feeding system; (2) a reversible sub-station; and (3) a feeding system.