A fault recovery scheme generation method for load transfer when multiple buses lose voltage

Abstract

The invention provides a method for generating a fault recovery scheme for load transfer when multiple buses are in loss of voltage. An external interconnection power supply is fully utilized. When the multiple buses are in loss of voltage, a buscouple power supply and the external interconnection power supply are matched for load transfer, in other words, loads of power-loss feeder lines without the external interconnection power supply are supplied by an instation reserve bus in a transfer mode, loads which cannot be supplied in a transfer mode have to lose power, and power supply of important loads is guaranteed in a priority mode; feeder lines with the external interconnection power supply are wholly supplied by an interconnection power supply outside a station in a transfer mode, and specifically a multi-fault power supply recovery method is adopted. Buscouple reserve capacity and the external interconnection power supply can be fully utilized, power-loss loads are recovered to the maximum degree, and the device utilization rate of a main transformer is increased.

Description

technical field [0001] The invention belongs to the field of feeder automation, and mainly studies the problem of fault recovery when multi-busbars in a multi-connection distribution network lose voltage. In order to recover the power-off load as much as possible, the present invention proposes a method for generating a fault recovery scheme for load transfer when multiple busbars lose voltage by coordinating bus-connected power supply and external connection power supply. Background technique [0002] Due to various reasons, power supply side faults often occur in the distribution network, resulting in the loss of voltage of the corresponding bus. The so-called multi-busbar voltage loss refers to the failure of the same substation with multiple busbar voltage loss at the same time. In order to improve the reliability of power supply and avoid losses caused by power outages, it is necessary to transfer the load on the voltage-loss bus to the normal working power supply. ...

AI Technical Summary

Problems solved by technology

[0005] 1. Only rely on the standby self-injection device. In order to meet the "N-1" principle, the utilization rate of the main transformer equipment is low. 67% of rated capacity;

[0006] 2. Without the use of external contact power supply, when multiple busbars lose voltage, it is difficult for the existing technology to realize the maximum power supply recovery of the power-off load

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