110kV incoming line protection-based comprehensive-shutting spare power automatic switching relay protection method

Abstract

The invention discloses a 110kV incoming line protection-based comprehensive-shutting spare power automatic switching relay protection method used for solving the technical problem that a 110kV spare power automatic switching device which utilizes 110kV incoming line protection as 110kV bus protection for shutting is incapable of normally achieving a protection effect when a 110kV I-section bus or a 110kV II-section bus has an outgoing line circuit. By virtue of adopting a substation 110kV incoming line protection-based comprehensive-shutting spare power automatic switching scheme, correct operation is performed to shut spare power automatic switching operation to switch off in case of 110kV bus faults under various operation modes, so that the condition that spare power automatic switching is mistakenly switched to malfunction equipment is prevented, and safe and stable operation of an power grid is facilitated. By virtue of adopting the substation 110kV incoming line protection-based comprehensive-shutting spare power automatic switching scheme, spare power automatic switching operation is not mistakenly shut to switch off in case of 110kV outgoing line faults under various operation modes, so that the power supply reliability of the power grid is improved. The method is simple in logic and easy to practice.

Description

technical field [0001] The invention relates to a relay protection method for standby self-injection, in particular to a comprehensive locking relay protection method for 110kV single bus segment connection 110kV incoming line protection in a substation, belonging to the technical field of electric power transmission and distribution network control. Background technique [0002] Since there is no special 110kV bus differential protection for the 110kV single bus section wiring in the substation, the 110kV incoming line protection is used as the 110kV bus protection to block the 110kV backup power automatic input device (abbreviated as standby self-injection). 110kV incoming line protection blocking 110kV is referred to as standby self-injection. The conventional practice is only: the first section bus fault is blocked by the protection blocking of the No. 1 power supply incoming line; the second section bus fault is blocked by the No. Incoming line protection action and sec...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a 110kV incoming line protection comprehensive blocking standby self-input relay protection method, to solve the problem of using 110kV incoming line protection as 110kV busbar protection to block the 110kV standby automatic input device, and for 110kV Ⅰ section busbar or 110kVⅡ section busbar to have outgoing lines The technical problem that the line cannot normally play a protective role

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