ISO 15118 EV Grid Code Signaling for V2G Compliance
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Solution Overview
Problem
Electric vehicles (EVs) operating as generators face challenges in complying with local specifications and grid code regulations, which are location-dependent and require specific parameters for safe and efficient operation.
Innovation Solution
The system utilizes grid codes, specifically configured for each location, to enable bidirectional power transfer (BPT) operations in EVs. This involves receiving and implementing location-specific grid codes, including parameters such as Overvoltage 10 min mean protection and anti-islanding disengage time, to ensure compliance with regional regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If EVs operate as generators without location-specific grid codes, then operational simplicity is maintained, but compliance with local specifications and grid code regulations cannot be ensured
Solution Approach 1:
The system dynamically adapts to different operational contexts by receiving and implementing location-specific grid codes. The EV's power management system adjusts its behavior based on the geographic location and corresponding grid regulations, transitioning from a static to a dynamic compliance approach that ensures reliability without requiring hardcoding of all possible regulations.
Solution Approach 2:
The system changes operational parameters based on received grid codes. By receiving location-specific parameters and regulations through communication protocols, the EV modifies its power discharge, charging, and grid interaction behaviors to comply with local specifications, resolving the contradiction between maintaining simplicity and ensuring regulatory compliance.
2Reliability
If EVs discharge power to the grid without location-specific parameters, then operational flexibility is maintained, but safety and efficiency under local regulations cannot be ensured
Solution Approach 1:
The system achieves universal compliance across different locations through a multi-functional power management system. This system can receive, interpret, and implement various grid codes from different geographic regions, making the EV adaptable to multiple operational environments while maintaining safe and efficient operation under each location's specific regulations.
Solution Approach 2:
The power management system dynamically adjusts operational parameters based on location-specific grid codes received through communication protocols. This dynamic adaptation allows the EV to maintain operational flexibility while ensuring safety and efficiency compliance with local regulations in any geographic location.
3Reliability
If the ISO 15118-20 standard does not include grid code parameters, then communication simplicity is maintained, but EVs cannot comply with local grid code specifications
Solution Approach 1:
The system performs preliminary actions by receiving and storing grid code parameters before actual power transfer operations. The power management system proactively acquires location-specific grid codes and compliance parameters through communication protocols, preparing the EV for regulatory-compliant operation in advance, thus enabling compliance without significantly increasing communication complexity during critical power transfer phases.
Data Source
AI summary
The described technology is generally directed towards implementation of an electric vehicle (EV) as an energy generator for a vehicle to grid (V2G) power discharge operation. Energy available at a battery onboard the EV can be discharged to an electrical grid, e.g., via an electric vehicle supply equipment (EVSE)/wallbox. A grid code(s) can be received at the EV. The grid code can be in compliance with EN50549-1 or a local grid code specification. The grid code can include a parameter(s) required to perform the V2G operation, e.g., an “Overvoltage 10 min mean protection, “anti-islanding disengage time”, and the like. The parameter(s) can be added to a distributed energy resource (DER) function bitmap, e.g., to enable an anti-islanding detection method. Communication between the EV and the EVSE can be ISO 15118-2, ISO 15118-20, etc.