EV Charging Control for Grid Power Adjustment With Timer Reservations
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Solution Overview
Problem
The existing systems for managing power adjustments in electric vehicles (xEVs) face challenges in utilizing the power accumulation devices for external power source adjustments without impairing user convenience, particularly when timer charging is involved, as it can lead to inaccuracies and inconvenience due to disturbances in charging schedules.
Innovation Solution
A server is configured to select and control a group of vehicles to adjust their charging power in sync with an external power source, advancing the start of charging for vehicles with reserved end times within a predetermined period, thereby minimizing disruptions and ensuring accurate power adjustments without excessively impacting user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the server uses the power accumulation device for power adjustment during timer charging, then the power adjustment accuracy is improved, but the user convenience is significantly impaired
Solution Approach 1:
The server identifies vehicles with timer charging reservations before the adjustment period begins and advances their charging start time. This preliminary action ensures that these vehicles complete charging before the adjustment period, preventing them from causing power adjustment inaccuracies while still allowing the server to select other vehicles for power adjustment during the adjustment period, thus maintaining user convenience.
2Measurement precision
If the server cancels the timer charging to use the power accumulation device for power adjustment, then the power adjustment accuracy is improved, but the user convenience is significantly impaired
Solution Approach 1:
Instead of canceling timer charging, the server performs preliminary identification of vehicles with timer charging reservations and advances their charging start time before the adjustment period. This allows the vehicle to complete charging in advance, removing it from the adjustment period pool and preventing power adjustment inaccuracies without canceling the user's charging reservation, thus maintaining user convenience.
3Measurement precision
If the server selects target vehicles before the adjustment period, then the power adjustment accuracy is improved, but the flexibility to handle timer charging disturbances is reduced
Solution Approach 1:
The server performs preliminary selection of target vehicles before the adjustment period and simultaneously identifies vehicles with timer charging reservations. By advancing the charging start time of reserved vehicles before the adjustment period, the server ensures they will not cause power adjustment inaccuracies. This preliminary action maintains selection flexibility during the adjustment period while ensuring power adjustment accuracy.
Data Source
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AI summary
A server (200) controls a vehicle group (1) including a plurality of vehicles (100) configured to be electrically connectable to an external power source (PG). The server (200) includes a selection unit (210) that selects a plurality of target vehicles from among the vehicle group (1) before a start of a predetermined adjustment period, and a charging control unit (220). The charging control unit (220) controls at least one of the target vehicles such that a total charging power (W2) of the power accumulation device (11) included in each of the target vehicles electrically connected to the external power source (PG) follows a target value (W1) within the adjustment period, and advances a start of charging of a power accumulation device (11) included in a first vehicle of which a charging end time is reserved within the adjustment period from among the target vehicles.