Power Converter Voltage Control for V2G Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for controlling power converters in Vehicle-to-Grid (V2G) technology suffer from inefficiencies in energy transmission between vehicle batteries and the power grid, leading to fluctuations in voltage and reduced energy transfer efficiency.
Innovation Solution
A method and apparatus for controlling a power converter that dynamically adjusts the actual output voltage based on theoretical output and input voltages of both the battery and the power grid, ensuring operation within safe voltage ranges and minimizing differences from previous cycles to enhance energy transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If dynamic voltage adjustment is implemented to improve energy transmission efficiency, then energy transmission efficiency is improved, but control complexity increases
Solution Approach 1:
The patent implements dynamic voltage adjustment by continuously modifying the output voltage of the first converter and input voltage of the second converter based on real-time voltage measurements from the battery and power grid. This dynamic control optimizes energy transmission efficiency by adapting voltage levels to current operating conditions, directly resolving the contradiction between maintaining fixed simple control and achieving high transmission efficiency.
Solution Approach 2:
The control method employs feedback mechanisms by measuring actual voltages at key points (battery voltage, grid voltage, converter output/input voltages) and using these measurements to adjust converter operating parameters. This closed-loop feedback system enables the converters to automatically optimize their performance, improving energy transmission efficiency while managing control complexity through systematic voltage regulation.
2Loss of energy
If voltage is increased to improve energy transmission, then energy transmission efficiency is improved, but risk of voltage exceeding safe ranges increases
Solution Approach 1:
The patent systematically manages voltage parameters by establishing theoretical output voltage for the first converter and theoretical input voltage for the second converter based on measured battery and grid voltages. These theoretical voltage values are carefully calculated to remain within safe operating ranges while optimizing energy transmission, directly addressing the contradiction between achieving high transmission efficiency and maintaining voltage safety.
Solution Approach 2:
The control method incorporates safety margins and constraints in voltage calculations before actual operation occurs. By pre-calculating theoretical voltage values that account for maximum and minimum operating limits, the system prevents voltage from exceeding safe ranges while still optimizing energy transmission efficiency under normal operating conditions.
3Adaptability or versatility
If voltage fluctuation is allowed to accommodate varying loads, then adaptability is improved, but energy transmission efficiency deteriorates
Solution Approach 1:
The patent implements dynamic voltage regulation that adapts to varying loads by continuously adjusting converter voltages based on real-time measurements. Rather than allowing uncontrolled voltage fluctuations, the system dynamically optimizes voltage levels to maintain high energy transmission efficiency while accommodating different load conditions, resolving the contradiction between adaptability and efficiency.
Data Source
AI summary
The application provides a method for controlling a power converter, in which a theoretical output voltage of a first converter is acquired according to a voltage of a source side, a theoretical input voltage of a second converter is acquired according to a voltage of a destination side, and an actual output voltage of the first converter in a first power supply cycle is set according to the theoretical output voltage of the first converter and the theoretical input voltage of the second converter.