EV Charging Profile Control for Grid Demand Response
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Solution Overview
Problem
Electric vehicle charging stations impose a significant electrical load on the grid, making it challenging for them to participate in demand response requests without disrupting ongoing charging activities.
Innovation Solution
A controller is used to manage the participation of electric vehicle charging stations in grid support by estimating maximum charging power, submitting requests to participate in demand response programs, and generating charging profiles to implement demand response requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electric vehicle charging stations increase charging power to meet customer demand, then charging speed and customer satisfaction improve, but electrical load on the grid increases and grid stability deteriorates
Solution Approach 1:
The charging station controller dynamically adjusts charging power levels based on real-time grid conditions and demand response requests. The system modifies charging profiles on-the-fly, transitioning between different power delivery states to balance customer charging needs with grid stability requirements during demand response events.
Solution Approach 2:
The system changes operational parameters including charging power levels, voltage, and current based on grid conditions. By modifying these electrical parameters in response to demand response requests, the charging station can reduce load on the grid while maintaining safe and effective charging operations.
2Reliability
If electric vehicle charging stations reduce charging power to support grid demand response, then grid stability improves, but charging speed decreases and customer satisfaction may deteriorate
Solution Approach 1:
The charging station pre-negotiates and pre-configures demand response participation parameters before grid events occur. By establishing charging profiles and power delivery parameters in advance, the system can quickly respond to demand response requests without significantly impacting ongoing charging sessions, thus maintaining customer satisfaction while supporting grid stability.
Solution Approach 2:
The system applies partial demand response reduction to charging power rather than complete shutdown. By reducing power delivery only to the extent necessary to meet demand response objectives while maintaining minimum charging levels, the system supports grid stability without completely halting charging operations, thereby preserving customer satisfaction.
3Adaptability or versatility
If electric vehicle charging stations participate in demand response programs, then grid support capability improves, but complexity of managing charging operations increases
Solution Approach 1:
The charging station controller autonomously manages demand response participation by automatically receiving grid requests, evaluating local charging conditions, generating appropriate charging profiles, and implementing power adjustments without requiring manual intervention. This self-service capability simplifies operation management while maintaining high grid support capability.
Solution Approach 2:
The system implements continuous feedback loops between the controller, charging equipment, and grid management servers. By monitoring grid conditions, charging status, and demand response requests in real-time, the controller can dynamically adjust charging profiles to balance grid support objectives with charging performance, reducing operational complexity through automated closed-loop control.
Data Source
AI summary
In one aspect, a controller for managing a participation of an electric vehicle charging station comprising a plurality of electric vehicle supply equipment in grid support of an electric grid is provided. The controller comprises at least one processor configured to estimate a maximum charging power supplied by the plurality of electric vehicle supply equipment over a time period, identify a demand response request for the electric vehicle charging station to participate in a demand response program for the electric grid during the time period, and generate, based on the estimate and in response to the demand response request, at least one charging profile for one or more of the plurality of electric vehicle supply equipment of the electric vehicle charging station.