Distributed Power Source Control for Balanced Load Sharing

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Solution Overview

Problem

In distributed power supply systems, existing technologies fail to effectively manage load distribution among power supply devices with varying capabilities, leading to uneven voltage supply and inefficiencies such as heat generation and switching losses in inverters.

Innovation Solution

A control device that communicates with distributed power sources to acquire capability and supply power information, determines a target power value, and adjusts the voltage supplied by each power source to balance load distribution, thereby controlling power supply according to the load of each device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If power supply devices with different capabilities are connected in a distributed power supply system, then the system can provide greater adaptability and versatility, but it becomes difficult to appropriately control the load distribution to prevent high load on low-capability devices

Engineering Contradiction:

Improveadaptability of power supply systemVSAvoidease of controlling load distribution

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The control device acquires capability information from each distributed power source and uses this feedback to dynamically determine target power values and control output states, ensuring appropriate load distribution according to each device's capabilities

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system changes the control parameter from simple on/off control to continuous power specification information control, allowing precise adjustment of each power source's output according to its capabilities and system needs

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If power supply devices operate without centralized control, then the system complexity is reduced, but uneven voltage supply and inefficiencies such as heat generation and switching losses occur

Engineering Contradiction:

Improvecomplexity of control systemVSAvoidenergy loss from heat generation and switching losses

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

A control device acts as an intermediary between distributed power sources and loads, coordinating their operation to minimize energy losses while maintaining system simplicity through centralized management of power specification information

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If centralized control is implemented to manage load distribution, then power supply efficiency is improved, but the device complexity increases

Engineering Contradiction:

Improvepower supply efficiencyVSAvoidcomplexity of control device

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The control device performs multiple functions including acquiring capability information, determining target power values, and controlling output states, consolidating these functions in a single device to improve efficiency without proportionally increasing complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250007297A1Control device, power supply system, control method, and non-transitory computer readable storage medium

Publication Date: 2025.01.02 HONDA MOTOR CO LTD

AI summary

A control device capable of communicating with a plurality of distributed power sources in a power supply system that supplies electric power to a demander, the control device performs: acquiring capability information regarding a capability of power supply of a first distributed power source and supply power information regarding a power amount being supplied by the first distributed power source from the first distributed power source out of the plurality of distributed power sources; determining a target value of electric power supplied by the first distributed power source on the basis of the acquired capability information; and controlling electric power supplied by the first distributed power source on the basis of the determined target value and the acquired supply power information.