Vehicle Fleet Communication Scheduling for Grid Balancing Bids
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Solution Overview
Problem
Existing vehicle management systems for balancing power in external power supplies face challenges in accurately grasping vehicle status due to high communication frequency leading to increased costs and processing loads, which can result in penalties for non-compliance with electricity market contracts.
Innovation Solution
A vehicle management device that selectively increases communication frequency with target vehicles during critical periods before contracts, deadlines, and balancing periods to accurately manage vehicle status and reduce communication costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the server frequently communicates with the vehicle to sequentially acquire real-time statuses, then the measurement precision of vehicle status is improved, but the communication cost and processing load increase
Solution Approach 1:
The server performs communication with vehicles at different frequencies based on temporal patterns. High-frequency communication is conducted during specific periods (T1 before contract conclusion, T2 before deadline, T3 during balancing period) when accurate status information is critical, while low-frequency communication is used during other periods. This periodic variation in communication frequency resolves the contradiction by acquiring real-time status data only when necessary, thereby reducing overall communication cost and processing load while maintaining measurement precision during critical time windows.
2Reliability
If the communication frequency is increased to accurately grasp vehicle status, then the reliability of vehicle status information is improved, but the communication cost increases
Solution Approach 1:
The system implements time-dependent communication frequency adjustment where the server communicates with vehicles at high frequency during specific periods (T1, T2, T3) when reliable status information is essential for contract conclusion, deadline compliance, and balancing power provision. During other periods, communication frequency is reduced. This approach ensures high reliability of vehicle status information when needed most while minimizing communication cost overall.
3Productivity
If the server maintains high frequency communication over a long period, then the productivity of vehicle status monitoring is improved, but the processing load and power consumption increase
Solution Approach 1:
The server adjusts communication frequency periodically based on temporal patterns rather than maintaining constant high-frequency communication. During specific periods (T1 before contract, T2 before deadline, T3 during balancing period), high-frequency communication ensures high productivity of vehicle status monitoring. During other periods, communication frequency is reduced to minimize processing load and power consumption. This resolves the contradiction by concentrating monitoring productivity during critical periods rather than distributing it uniformly across all time.
Data Source
AI summary
A vehicle management device manages a vehicle group. The vehicle management device includes one or more computers. The vehicle management device periodically communicates with one or more target vehicles in the vehicle group. The target vehicles are operable as a balancing power for a power grid. The vehicle management device communicates with the target vehicles in at least one of a first period, a second period, and a third period at a frequency higher than an average communication frequency in periods excluding the first to third periods. The first period is immediately before a bid and a contract are made for the balancing power for the external power supply in an electricity market. The second period is immediately before a deadline for submission of a supply and demand planned value. The third period is a period in which provision of the balancing power for the external power supply is requested.