Distributed power generation unit, microgrid system, and shunt control method in microgrid system

By implementing the main unit selection process and the attenuation coefficient adjustment process, the problem of power mismatch between distributed power generation units is solved, the ratio of output power to power rating is adjusted, the amount of communication data is reduced, and the system efficiency is improved.

CN122118899APending Publication Date: 2026-05-29LITE ON SINGAPORE PTE LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LITE ON SINGAPORE PTE LTD
Filing Date
2025-08-08
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The mismatch between power rating and output power among multiple parallel distributed power generation units results in a large amount of communication data, which consumes system control and communication resources.

Method used

The system introduces a master unit selection process and an attenuation coefficient adjustment process. The master distributed generation unit is selected through the control area network bus, and the output power of the slave distributed generation unit is adjusted according to the virtual impedance, thereby reducing the amount of communication data.

Benefits of technology

It effectively adjusts the output power and power rating ratio of distributed power generation units, reduces communication data volume, saves system resources, and improves system operating efficiency.

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Abstract

A distributed power generation unit is provided, including a current meter and a processor. The current meter outputs a unit current according to a power rating of the distributed power generation unit. The processor is coupled between a control area network bus and a circuit block. The processor causes the distributed power generation unit to identify a first electrical signal at an initial time and implement a master unit selection process. The master unit selection process includes determining a delay time based on the unit current and a maximum unit current, identifying the unit current as the maximum unit current after the delay time elapses from the initial time, and broadcasting the maximum unit current and a second electrical signal over the control area network bus. The processor is further configured to implement a decay coefficient adjustment process to maintain a current state of the distributed power generation unit after the second electrical signal is broadcast. The present invention also relates to a microgrid system and a shunt control method in the microgrid system.
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