Power Balancing Control Using Duration-Based Storage Selection
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Solution Overview
Problem
Existing power balancing methods struggle to efficiently manage power balancing requests when high-capacity power storage devices are already in use, leading to insufficient resources and increased deterioration due to frequent charging and discharging.
Innovation Solution
A control system that classifies power storage devices into large-capacity and small-capacity types and selectively uses these resources based on the duration of power balancing requests, prioritizing small-capacity resources for short-term balancing and large-capacity resources for long-term balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-capacity power storage devices are preferentially selected for power balancing, then the ability to meet multiple power balancing requests is improved, but the frequency of charging and discharging increases causing accelerated deterioration
Solution Approach 1:
The system changes the selection parameter from always preferring high-capacity devices to considering both capacity and request duration. By introducing duration as a parameter, the system can select small-capacity devices for short-term requests, reducing the charging/discharging frequency of high-capacity devices while still meeting all power balancing requests.
2Duration of action of moving object
If only high-capacity power storage devices are used for power balancing, then the resource availability for long-term balancing is improved, but the number of available resources for multiple simultaneous requests becomes insufficient
Solution Approach 1:
The system segments power balancing requests by duration (short-term vs. long-term) and assigns different resource types accordingly. Small-capacity devices are allocated to short-term requests while large-capacity devices handle long-term requests, effectively segmenting the resource pool to maximize overall availability and utilization.
3Measurement precision
If small-capacity power storage devices are used for short-term power balancing, then the deterioration of high-capacity devices is reduced, but the ability to meet long-term power balancing requests is weakened
Solution Approach 1:
The control system acts as an intermediary that matches request duration with appropriate device capacity. By introducing this matching mechanism, small-capacity devices can serve short-term requests without compromising the ability to meet long-term requests, as the control system directs long-term requests to large-capacity devices.
Data Source
AI summary
A control system includes a computer that controls each of multiple power balancing resources. The computer selects one or more control targets to be used for power balancing of an external electric power source from the power balancing resources, and controls each of the one or more control targets so as to cause the power storage device to charge or discharge for the power balancing. The computer preferentially selects the power balancing resource provided with a small-capacity power storage device as the control target for the power balancing of which duration is shorter than a predetermined time, and preferentially selects the power balancing resource provided with a large-capacity power storage device as the control target for the power balancing of which the duration is longer than the predetermined time.