Ordered Charging Management for EV Stations
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Solution Overview
Problem
The disorderly charging of electric vehicles at charging stations can lead to transient overload, affecting the load and voltage of the distribution network, posing risks to electricity safety and reliability.
Innovation Solution
A system and method for ordered charging management, which includes a charging station control-management device, a charging pile monitoring device, and a system platform server that determine power headroom and adjust charging power or respond to charging requests to prevent overload, using power capacity settings and operating parameter analysis to manage charging effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of charging piles is increased to meet charging demand, then charging service capacity is improved, but transient overload occurs at the charging station
Solution Approach 1:
The charging station control-management device dynamically adjusts the charging power of multiple charging piles based on real-time power headroom assessment. When power headroom is insufficient, the system automatically reduces charging power to prevent overload, and increases it when headroom is available, making the charging capacity flexible rather than fixed.
Solution Approach 2:
The system continuously monitors the power capacity and operating parameters of charging piles, compares current charging demand with available power headroom, and adjusts charging power accordingly. This closed-loop feedback mechanism ensures that charging service capacity is maximized while maintaining electricity safety through real-time overload prevention.
2Productivity
If multiple charging piles charge simultaneously to serve more vehicles, then charging efficiency is improved, but power headroom is exceeded causing overload
Solution Approach 1:
The system allows multiple charging piles to charge simultaneously when power headroom is sufficient, but selectively reduces or delays charging for certain piles when headroom is exceeded. This partial action approach enables the system to maintain high charging efficiency for most piles while preventing harmful overload effects on the distribution network.
Solution Approach 2:
The control-management device changes the operating parameters of charging piles dynamically, specifically adjusting charging power levels based on real-time power headroom assessment. When overload risk is detected, the system modifies power parameters to reduce total demand, thereby preventing harmful effects while maintaining efficient charging when conditions permit.
3Loss of time
If charging power is increased to reduce charging time, then user satisfaction is improved, but voltage stability of distribution network deteriorates
Solution Approach 1:
The system performs preliminary assessment of power headroom before allowing high-power charging. By evaluating available power capacity in advance, the system can approve rapid charging requests only when sufficient headroom exists, preventing voltage instability. This preliminary check ensures user satisfaction through fast charging while protecting distribution network voltage stability.
Data Source
AI summary
Provided herein are a system and method for ordered charging management of a charging station. The system includes a charging station control-management device, a charging pile monitoring device and a system platform server. The system platform server is configured to send a power capacity of the charging station to the charging station control-management device corresponding to the charging station. The charging pile monitoring device is configured to collect an operating parameter of a charging pile corresponding to the charging pile monitoring device and to send the operating parameter to the charging station control-management device. The charging station control-management device is configured to determine whether the charging station has a power headroom according to the power capacity and the operating parameter of all charging piles at the charging station after receiving a charging request sent by the charging pile monitoring device.