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Locked spare power automatic switching relay protection method for incoming line protection of 110kV sectionalized single-bus configuration

A single busbar segmented, relay protection technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as inability to judge

Active Publication Date: 2016-11-30
STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This approach cannot be adapted to the 110kV Ⅰ section busbar or 110kVⅡ section busbar when there are outgoing lines, because when the outgoing line fails, the 110kV power supply incoming line protection cannot judge whether it is a 110kV outgoing line fault or a 110kV bus fault

Method used

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  • Locked spare power automatic switching relay protection method for incoming line protection of 110kV sectionalized single-bus configuration
  • Locked spare power automatic switching relay protection method for incoming line protection of 110kV sectionalized single-bus configuration
  • Locked spare power automatic switching relay protection method for incoming line protection of 110kV sectionalized single-bus configuration

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Embodiment Construction

[0077] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0078] This scheme meets the following main wiring requirements:

[0079] (1) 110kV single busbar subsection primary main wiring in 110kV substation;

[0080] (2) Primary main wiring of 110kV double bus in 220kV substation;

[0081] (3) 110kV single busbar section primary main wiring in 220kV substation.

[0082] Such as figure 1 As shown, the power transmission and distribution network to which the method of the present invention is applied is a substation 110kV single-bus section primary main wiring system network. The primary main wiring of the 110kV system of the power transmission and distribution network includes: No. 1 power supply incoming line interval equipment, No. 2 power supply incoming line interval equipment respectively connected to 110kV Section I busbar and 110kV SectionⅡ busbar; segmental circuit breaker, and is connected...

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Abstract

The invention discloses a locked spare power automatic switching relay protection method for incoming line protection of 110kV sectionalized single-bus configuration. A control condition of switching on of a No.1 power circuit breaker of the locked spare power automatic switching of an incoming line protection action, the control condition of the switching on of a No.2 power circuit breaker of the locked spare power automatic switching of the incoming line protection action, and the control condition of the switching on of a section breaker of the locked spare power automatic switching of the incoming line protection action are given. According to the locked spare power automatic switching relay protection method disclosed by the invention, correct actions can be carried out on various 110kV bus faults in various operation modes, and the locked spare power automatic switching is switched on to prevent wrong automatic switching of the spare power automatic switching on the faulty equipment, which is beneficial for the safe and stable operation of a power grid; in the various operation modes, in the case of 110kV outlet faults, no wrong locked spare power automatic switching action is carried out realize switching on, and thus the power supply reliability of the power grid is improved; and the locked spare power automatic switching relay protection method in the technical scheme provided by the invention is simple and feasible in logic.

Description

technical field [0001] The invention relates to a 110kV single busbar segmented wiring incoming line protection locking standby self-switching relay protection method, which belongs to the technical field of 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 and blocking 110kV standby self-injection conventional practice is as follows: Section Ⅰ bus failure is blocked by No. 1 power supply incoming line protection; Line protection action and section protection blocking closing of section circuit breaker. This approach cannot be adapted to the 110kV section I busbar or 110kVII section busbar with outgoing lines, because when the out...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H7/22
CPCH02H7/22H02H7/26
Inventor 汤大海陈永明李静曹斌孙东杰马海薇陈燕丁国华施伟成潘书燕王寅丞
Owner STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO
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