Microgrid EVSE Parking Allocation for Overdemand Power Balancing
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Solution Overview
Problem
In a power grid like a microgrid, maintaining a balance of power supply and demand is crucial for stabilization, but simultaneous charging of many vehicles can lead to an overdemand state, preventing vehicles from charging immediately, and existing systems struggle to efficiently allocate resources to resolve this imbalance.
Innovation Solution
A power management system that includes a server managing power adjustment resources, such as vehicles with parking spaces, where the server allocates parking spaces for power feeding vehicles to the grid during overdemand states, motivating users to provide power back to the grid, and prioritizes vehicles that can supply larger electric power to ensure reliable demand balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If many vehicles perform charging simultaneously, then charging service availability is improved, but power supply and demand balance deteriorates (overdemand state)
Solution Approach 1:
The server performs preliminary allocation of parking spaces to power feeding vehicles before the overdemand state occurs. When the balance of power supply and demand is predicted to enter an overdemand state, the server proactively reserves parking spaces for power feeding vehicles, enabling them to feed power back to the grid in advance, thus preventing the overdemand situation from developing.
Solution Approach 2:
The system changes the operational parameter of parking spaces from a static resource to a dynamically allocated resource based on power supply and demand conditions. The server adjusts the allocation of parking spaces to power feeding vehicles versus charging vehicles according to the current balance state, effectively using parking space allocation as a control parameter to maintain power balance.
2Reliability
If parking spaces are allocated to power feeding vehicles during overdemand state, then power supply and demand balance is improved, but charging vehicle service availability deteriorates
Solution Approach 1:
The server performs preliminary allocation of parking spaces to power feeding vehicles before the overdemand state occurs. When the balance of power supply and demand is predicted to enter an overdemand state, the server proactively reserves parking spaces for power feeding vehicles, enabling them to feed power back to the grid in advance, thus preventing the overdemand situation from developing.
Solution Approach 2:
The server periodically monitors the balance of power supply and demand and adjusts parking space allocation accordingly. The system implements periodic allocation cycles where parking spaces are dynamically reassigned between charging vehicles and power feeding vehicles based on current grid conditions, creating a rhythmic adjustment pattern that balances both needs.
3Productivity
If parking spaces are allocated dynamically based on power balance, then resource utilization efficiency is improved, but system complexity increases
Solution Approach 1:
The server acts as an intermediary that manages the allocation of parking spaces between charging vehicles and power feeding vehicles. It receives requests from both types of vehicles, determines the current power supply and demand balance, and makes allocation decisions based on this information, thereby coordinating the conflicting needs without requiring direct complex interactions between vehicles.
Solution Approach 2:
The system changes the operational parameter of parking spaces from a static resource to a dynamically allocated resource based on power supply and demand conditions. The server adjusts the allocation of parking spaces to power feeding vehicles versus charging vehicles according to the current balance state, effectively using parking space allocation as a control parameter to maintain power balance.
Data Source
AI summary
A power management system includes a plurality of power adjustment resources electrically connected to a microgrid. The plurality of power adjustment resources include a plurality of EVSEs, each of EVSEs including a parking space. When any one of a plurality of power feeding vehicles is parked in the parking space, an EVSE enables power feeding from a vehicle parked in the parking space to the microgrid. A CEMS server manages the parking space. When a balance of power supply and demand in the microgrid is in an overdemand state, the CEMS server allocates the parking space to a power feeding vehicle that responds to a request for power feeding to the microgrid, of the plurality of power feeding vehicles.