Active power distribution network voltage out-of-limit treatment method based on flexible multi-state switch

By integrating a dual-port flexible multi-state switch into the active distribution network, and utilizing its power flow balance and power regulation capabilities, the voltage over-limit problem was solved, voltage balance and reactive power compensation between feeders were achieved, and the stability and economy of the system were improved.

CN121840682APending Publication Date: 2026-04-10CHINA THREE GORGES UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA THREE GORGES UNIV
Filing Date
2025-12-15
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

Voltage over-limit problems in active distribution networks are difficult to solve effectively, especially when distributed power sources are unevenly connected. Traditional control methods cannot meet the requirements of real-time performance and flexibility, and existing equipment cannot achieve power flow mutual assistance and reactive power compensation between feeders.

Method used

A voltage over-limit mitigation method based on a dual-port flexible multi-state switch is adopted. By calculating and identifying nodes prone to voltage over-limit, a dual-port flexible multi-state switch is connected. Based on the load balance and voltage status, the port mode is controlled to achieve power flow balance and power regulation, including constant DC voltage-reactive power control and active-reactive power control modes.

Benefits of technology

It achieves voltage balancing among feeders in active distribution networks, reduces equipment capacity requirements, and improves the economy and reliability of voltage over-limit management, making it suitable for large-scale promotion.

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Abstract

The invention discloses an active power distribution network voltage out-of-limit treatment method based on flexible multi-state switches, and the method comprises the steps: determining the number of accessed dual-port flexible multi-state switches (FMSS) according to the number of tail end nodes which are liable to generate a voltage out-of-limit problem in an active power distribution network; according to the load balance degree of a feeder line connected with the dual-port flexible multi-state switch, the sizes of active power and reactive power adjusted by the dual-port flexible multi-state switch are determined, so that the control mode of the port of the flexible multi-state switch is determined, and the dual-port flexible multi-state switch port converter is controlled. Power flow mutual aid among different feeder lines is realized, the voltage out-of-limit problem of the active power distribution network is treated, and the problem that the active power distribution network cannot completely consume the power injected by the distributed power supply under the condition that the distributed power supply is connected is solved; compared with an existing voltage out-of-limit treatment method, the method makes full use of the power regulation and control and power flow mutual aid functions of the flexible multi-state switch, and the capacity requirement for the flexible multi-state switch is lowered.
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Citation Information

Patent Citations

  • Flexible multi-state switch and voltage fluctuation stabilizing method

    CN116646942A

  • Power distribution network electric energy quality treatment method and device based on flexible multi-state switch

    CN119674990A