Central Control System for Vehicle Charging Power Reduction
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Solution Overview
Problem
Existing methods for controlling the electrical charging of a group of vehicles often fail to rapidly reduce power consumption in response to network operator demands due to high response times and asynchronous operations of vehicle-side energy stores.
Innovation Solution
A central control system communicates with vehicles and electrical units to suspend charging and adjust power consumption/output, utilizing electrical units with faster response times and better synchronization to achieve rapid and accurate power reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If vehicle-side energy stores are used to reduce power consumption, then power reduction is achieved, but response time is slow and synchronization is poor
Solution Approach 1:
The system segments the power reduction task between two types of energy stores: vehicle-side energy stores (for sustained power reduction) and central energy stores (for rapid response). This segmentation allows each component to specialize - vehicles provide bulk power reduction capacity while the central system provides fast response to network operator requests.
Solution Approach 2:
The central control system acts as an intermediary between the power network operator and the distributed vehicle energy stores. It receives reduction requests from the network operator, coordinates the response across multiple vehicles, and manages the timing and magnitude of power reduction, thereby solving the synchronization and response time issues.
2Power
If charging of multiple vehicles is controlled simultaneously, then power reduction requirement is addressed, but asynchronous vehicle operations reduce control effectiveness
Solution Approach 1:
The system merges the control of multiple asynchronous vehicle charging operations into a unified coordinated response. By combining the power reduction capabilities of multiple vehicles under centralized coordination, the system achieves synchronized power reduction even though individual vehicles operate asynchronously, effectively addressing the network operator's requirements.
3Power
If vehicle charging is interrupted to reduce power consumption, then network operator requirements are met, but vehicle departure time requirements may be compromised
Solution Approach 1:
The system applies partial action by selectively interrupting charging of only those vehicles that can tolerate the interruption without missing their departure time requirements. The central control system evaluates each vehicle's charging state, remaining energy needs, and departure schedule to determine which vehicles should suspend charging, thereby achieving power reduction while preserving departure time guarantees for critical vehicles.
Data Source
AI summary
A method controls the electrical charging of a group of vehicles which are electrically connected to a power supply system of a power supply system operator, wherein the respective vehicles obtain power for charging a vehicle energy store from the power supply system. A central control system can communicate with the respective vehicles and with a server of the power supply system operator and a number of electrical units via communication signals, wherein the number of electrical units each have a higher response time for an electrical power adjustment in response to communication signals from the central control system and/or a higher time synchronicity with respect to a clock of the central control system in comparison with the vehicles. In response to a received reduction command from the server, the control system transmits one or more first commands which suspend the charging of vehicle energy stores to vehicles in the group, wherein the reduction command stipulates a power amount by which the power consumption of the group of vehicles in the power supply system should be reduced. The control system also determines, at predefined intervals of time, a power value which is composed of the reduction in the total power consumption of the vehicle energy stores and the number of electrical units plus the increase in the total power output of the vehicle energy stores and the number of electrical units. In this case, the control system regulates the power value to the power amount according to the reduction command using one or more second commands which are transmitted to electrical units by the control system and change the power consumption and/or power output of electrical units.