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Quick adjustment method for parallel line branching factor in substation area distance protection section III

A branch factor and distance protection technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as difficulty in implementation, real-time problems, and single-phase faults are not considered, to avoid misoperation and improve reliability.

Active Publication Date: 2015-01-28
TSINGHUA UNIV +3
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Problems solved by technology

However, this method does not consider the occurrence of single-phase faults on adjacent lines, and protects the single-phase power flow transfer caused by the first single-phase trip; and due to the rapid action of the distance I section, this method has problems in real-time performance, which is difficult accomplish
[0004] Adaptive tuning method for distance III segment has not been mentioned yet

Method used

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  • Quick adjustment method for parallel line branching factor in substation area distance protection section III

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Embodiment Construction

[0027] A method for quickly adjusting the branch coefficient of the parallel line of section III of the station domain distance protection proposed by the present invention is described in detail as follows in conjunction with the accompanying drawings and embodiments.

[0028] The process flow of the rapid adjustment method for the branch coefficient of the parallel line of the station domain distance protection section III is as follows: figure 1 As shown, the method includes the following steps:

[0029] Step 1) judging whether the protection starting circuit L1 is a parallel line structure, if it is to enter step 2); otherwise, directly proceed to step 4) to carry out protection algorithm processing;

[0030] Step 2) According to the GOOSE message information, judge whether the parallel line of line L1 has tripping or closing, if there is tripping or closing information, then proceed to step 3); otherwise, enter step 4);

[0031] Step 3) According to the jumping or closin...

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Abstract

The invention relates to a quick adjustment method for a parallel line branching factor in a substation area distance protection section III, and belongs to the field of a power system protection and control technology. The method comprises the steps of judging whether a protective starting line is a parallel line structure, quickly modifying the parallel line branching factor if the protective starting line is a parallel line structure and trip or switch on is caused, and then calculating a distance ground section III and a phase distance ground connection III in accordance with a current protective setting value after the definite value of the distance section III is quickly modified, and judging whether fault is caused; directly performing protection algorithm processing if the protective starting line is not a parallel line structure. According to the quick adjustment method provided by the invention, the contradiction of the substation area distance protection section III in flexibility and selectivity can be overcome; furthermore, a parallel line running condition can be quickly adjusted, so as to improve the reliability of the motion in the substation area distance protection section III.

Description

technical field [0001] The invention belongs to the technical field of power system protection and control, and in particular relates to a method for quickly adjusting branch coefficients of parallel lines in section III of station domain distance protection for intelligent substations. Background technique [0002] Smart substations have unique advantages in terms of secondary equipment compatibility, interoperability, and data resource sharing, bringing digital transformation to the power system. Based on the IEC61850 standard, station domain information such as tripping / closing information, voltage and current information of all substation equipment can be shared. The research on protection based on site-domain shared information is in the ascendant. The applicant has disclosed a protection control method for digital substation equipment and the first multifunctional device for integrated substation protection and control in patent CN101478146A; a quick start and phasor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
Inventor 董新洲曹润彬施慎行何世恩路亮姚旭
Owner TSINGHUA UNIV
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