Power Reception Priority Control to Cut EV Charge-Discharge Loss
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Solution Overview
Problem
Existing technologies do not effectively address conversion loss related to charging and discharging when electric vehicles are mixed in a group.
Innovation Solution
A charge-discharge loss reduction method that adjusts the priority of power receiving elements based on their charge-discharge state, using a power reception control device to manage power reception and minimize conversion loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electric vehicles are mixed in a group for charging and discharging, then power system flexibility is improved, but conversion loss increases
Solution Approach 1:
The patent changes the priority parameter of power receiving elements based on their charge-discharge state. When an electric vehicle switches between charging and discharging modes, its priority parameter is adjusted dynamically. This parameter change enables the system to optimize power allocation and reduce unnecessary charge-discharge cycles, thereby reducing conversion loss while maintaining system flexibility.
2Productivity
If priority-based power reception control is implemented, then power distribution efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic priority adjustment where the priority of each power receiving element is not fixed but changes based on real-time charge-discharge states. This dynamic mechanism allows the system to adapt to changing conditions automatically, improving power distribution efficiency without requiring complex manual intervention or overly complicated control structures.
Data Source
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AI summary
A charge-discharge loss reduction device includes a power reception control device that controls power received or discharged by power receiving elements included in a load group (11), in a power system that supplies electric energy to the load group (11) including the power receiving elements via a power supply base point (10). The power reception control device is configured to change a priority of an own power receiving element using a charge-discharge state of the own power receiving element, the priority indicating a degree to which power reception of the own power receiving element takes priority over power reception of another power receiving element.