Power generation and transmission system, control device, control method, method for installing power transmission cables, and computer program

JP7877589B2Active Publication Date: 2026-06-22KK TOSHIBA +1
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Patent Information

Application Number
JP2025526907
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2023-06-12
Publication Date
2026-06-22
Estimated Expiration
2043-06-12

AI Technical Summary

Technical Problem

Existing power transmission systems face disruptions when a failure occurs in one of the three-phase cables, leading to the loss of power transmission and generation opportunities.

Method used

A power transmission and distribution system that includes a power conditioner capable of outputting single-phase or three-phase AC power, converters, transmission cables, and a control device that switches to single-phase operation mode upon detecting a ground fault, allowing continuous power transmission using two of the three-phase cables.

Benefits of technology

Enables continuous power transmission by switching to single-phase operation, reducing power transmission losses and maintaining operation until cable replacement, thus minimizing power generation losses.

✦ Generated by Eureka AI based on patent content.

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Abstract

A power generation and transmission system according to an embodiment of the present invention comprises: a power conditioner capable of outputting single-phase or three-phase AC power having a prescribed frequency and voltage; a conversion device that supplies the AC power output of the power conditioner to a power grid; power transmission cables for at least three phases and for transmitting the output power of the power conditioner to the conversion device; a detection unit that detects a ground-fault accident that occurred in the power transmission cables; and a control device that, if a ground fault accident was detected, generates an instruction signal for a single-phase operation mode in which single-phase power transmission is carried out using, among the power transmission cables, cables other than the cables in which the ground-fault accident has occurred. The power conditioner is characterized by outputting, in accordance with the instruction signal, single-phase AC power via the cables other than the cables in which the ground-fault accident has occurred.
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Citation Information

Patent Citations

  • Two-end flexible low-frequency power transmission system two-phase operation control method based on M3C

    CN114142463A

  • MMMC-based end-to-end low-frequency power transmission system fault two-phase conversion power transmission method

    CN114156878A

  • Power controller for alternating current-direct current converter

    JP1986092128A

  • Power conditioner for dispersed power sources and dispersed power system

    JP2008283764A

  • Power transmission system and control method therefor

    JP2016101030A