V2G Child Aggregator Segregating Personal Data for Grid Stability
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Solution Overview
Problem
In Vehicle-to-Grid (V2G) systems, the risk of personal information leakage from vehicles to the aggregator is significant, potentially causing substantial damage due to insufficient security, especially when a large number of vehicles are involved.
Innovation Solution
A V2G system architecture where a child aggregator manages and aggregates information from transport machines, transmitting only first information (e.g., charging schedules) to a parent aggregator, while keeping second information (personal details) within the child aggregator, thereby minimizing exposure and enhancing security. The child aggregator also uses a stationary power storage facility as a buffer to guarantee power transfer reliability and provides incentives to vehicles for discharging power during stable grid conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the aggregator holds personal information regarding owners of vehicles to provide incentives, then the incentive system can be implemented, but the risk of information leakage increases
Solution Approach 1:
The system segments information into two categories: first information (charging/discharging data) that can be shared with the parent aggregator, and second information (personal information) that remains localized at the child aggregator. This segmentation allows the incentive system to function while minimizing information exposure risk.
Solution Approach 2:
The child aggregator acts as an intermediary between the parent aggregator and individual vehicles. It aggregates first information from multiple vehicles and transmits only this aggregated data to the parent aggregator, while retaining second information locally. This intermediary role enables incentive distribution without exposing personal information to the parent aggregator.
2Reliability
If the aggregator transmits detailed information from vehicles, then the parent aggregator can make accurate power management decisions, but the security risk increases
Solution Approach 1:
The child aggregator extracts only the necessary first information (charging/discharging capabilities and schedules) from vehicle data, separating it from the personal second information. This extraction process provides the parent aggregator with sufficient data for power management decisions while removing unnecessary personal information that would increase security risks.
3Reliability
If a large number of vehicles participate in V2G, then the power system stability improves, but the potential damage from information leakage increases
Solution Approach 1:
The system implements segmentation at the aggregator level, where each child aggregator maintains localized control over personal information for its managed vehicles. This allows large-scale vehicle participation to enhance power system stability while distributing information security responsibilities, so that a security breach at one child aggregator affects only its local vehicles rather than all participants.
Data Source
AI summary
There is provided a V2G system including a parent aggregator which manages buying and selling of power from a plurality of power supply sources to a power grid, and a child aggregator which manages a plurality of transport machines and guarantees the parent aggregator charging and discharging between at least one of batteries mounted on the transport machines and the power grid. The child aggregator acquires first information regarding the charging and discharging and second information regarding the transport machines from each of the transport machines, aggregates the first information and the second information, and transmits at least the first information to the parent aggregator.