EV Charging Station Load Management With Dynamic Fallback Power Sharing
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Solution Overview
Problem
Charging stations face challenges in ensuring optimal power distribution among multiple charging points, particularly in fault conditions, where existing methods fail to maximize transformer power usage and maintain efficient charging performance without excessive power drain from the electricity supply network.
Innovation Solution
A load management method that switches between dynamic and static power distribution modes, using specified algorithms to allocate transformer power among charging points, ensuring maximum power usage and continuity even in faulty system states, with dynamic mode optimizing power distribution based on demand and static mode providing equal power to all points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic power distribution is used to optimize charging performance, then charging efficiency is improved, but system reliability deteriorates in fault conditions
Solution Approach 1:
The system dynamically switches between two operational modes: dynamic power distribution mode for optimal charging efficiency and static power distribution mode for fault tolerance. The load management server can transition from algorithm-based dynamic allocation to equal-power static allocation when faults are detected, allowing the system to adapt its behavior based on operational conditions.
Solution Approach 2:
The system prepares a fallback static power distribution mechanism in advance that can be activated when dynamic load management fails. This pre-prepared alternative ensures continuous operation and prevents complete system failure, providing a cushion against the loss of sophisticated power allocation capabilities.
2Reliability
If static power distribution is used to ensure reliability, then system reliability is improved, but charging performance deteriorates
Solution Approach 1:
The system employs dynamic mode selection where the operational state (dynamic or static power distribution) is not fixed but changes based on system conditions. During normal operation, the dynamic mode provides optimized charging performance, while the static mode serves as a reliable fallback, creating a dynamic balance between performance and reliability.
3Loss of energy
If dynamic load management is used to maximize power utilization, then power efficiency is improved, but device complexity increases
Solution Approach 1:
The power distribution system is segmented into two distinct operational modes with different levels of complexity. The dynamic load management algorithm handles normal operations with optimized power allocation, while the static equal-power distribution handles fault conditions. This segmentation allows the system to use complex algorithms only when necessary, reducing overall operational complexity.
Solution Approach 2:
The sophisticated dynamic load management algorithm is extracted as an optional enhancement rather than a mandatory component for all operations. The system can function with simple equal-power distribution in fault mode, removing the complexity of algorithms from the critical path while retaining them for optimized operation when conditions permit.
Data Source
AI summary
A method for load management of a charging station, in which the charging station is formed by at least two charging points, each with a charging control and a power electronics module assigned to the respective charging point, a charge management server and a transformer connected to an electricity supply network. The network provides a transformer power, in which the load management carried out by the load management server controls an allocation of the transformer power among the respective charging points, in which a respective charging operation of a particular electric vehicle at a particular charging point is controlled via the respective charging control connected to the load management. Charging power controlled by the load management is provided by the respective power electronics module assigned to the respective charging point. The load management has a dynamic and a static execution mode.