Single power supply 10-kilovolt circuit protection three-stage configuration and fixed value setting method

Abstract

Disclosed is a single power supply 10-kilovolt circuit protection three-stage configuration and fixed value setting method. Two section switches are arranged on a 10kV circuit main line, and three-stage protection configuration is performed for protecting a circuit with a length of greater than 6km; the circuit distance of three-stage switches is not less than 2km; a second-stage switch and the third-stage switch on the main line are positioned close to positions of three dividing points on the main line; and then the first-stage switch, the second-stage switch and the third-stage switch are subjected to protection fixed value setting, and reclosure is set. The three-stage protection configuration and fixed value setting method for the 10kV single power supply circuit powered by 110kV and 220kV is proposed; the circuits of each stage of protection fixed values is set by the setting method, so that complete protection matching of circuit sections can be realized; in faults, a fault range can be greatly reduced; and by matching with reclosure setting, a fault-less region can be recovered within the shortest time.

Description

technical field [0001] The invention relates to a single power supply 10 kV line protection three-stage configuration and fixed value setting method, belonging to the technical field of power line configuration. Background technique [0002] A single power supply 10 kV line refers to a 10 kV line that is only connected to a substation on one side, and the other side extends power from the substation through an outlet switch. In order to reduce the scope of power outages in the event of a fault, the operation and maintenance department will generally set up a section switch on the main line of the single-power 10 kV line. There is no uniform method for setting and calculation of the fixed value, so that the section switch and the outlet switch often cannot be effectively coordinated. When a fault occurs on the 10kV distribution network line, the section switch and the substation outlet switch trip at the same time, and the section switch cannot realize fault isolation. , Red...

AI Technical Summary

Problems solved by technology

In order to reduce the scope of power outages in the event of a fault, the operation and maintenance department will generally set up a section switch on the main line of the single-power 10 kV line. There is no uniform method for setting and calculation of the fixed value, so that the section switch and the outlet switch often cannot be effectively coordinated. When a fault occurs on the 10kV distribution network line, the section switch and the substation outlet switch trip at the same time, and the section switch cannot realize fault isolation. , The role of reducing the scope of power outages

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