Method for identifying failure of sampling value data of intelligent substation based on waveform coefficient equation

A technology of smart substation and wave coefficient, applied in electrical components, emergency protection circuit devices, etc., can solve problems such as malfunction of relay protection units in smart substations

Inactive Publication Date: 2012-06-20
XJ ELECTRIC +2
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for identifying data failure of sampling values ​​in smart substations based on the form factor equation, so as to solve the problem of malfunctioning of relay protection units in smart substations caused by abnormal transformers

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  • Method for identifying failure of sampling value data of intelligent substation based on waveform coefficient equation
  • Method for identifying failure of sampling value data of intelligent substation based on waveform coefficient equation
  • Method for identifying failure of sampling value data of intelligent substation based on waveform coefficient equation

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Embodiment Construction

[0045] The method for identifying data failure of sampling values ​​in smart substations based on the form factor equation includes the following steps:

[0046] (1) The relay protection device establishes the data model of different protection units according to the different protection units;

[0047] (2) The data output by the unconventional transformer in the smart substation is digitally connected to the relay protection device through the merging unit and the switch. The data model calculates the form factor of the sampled values;

[0048] (3) The relay protection device judges the size and fluctuation range of the formed form coefficient value according to the form coefficient equation corresponding to different protection functions or module designs, so as to determine whether the relay protection is delayed or blocked immediately.

[0049] 1. Pilot differential protection

[0050] Here, the specific implementation of differential protection in relay protection will ...

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Abstract

The invention relates a method for identifying the failure of the sampling value data of an intelligent substation based on a waveform coefficient equation. The method comprises the following steps that: a relay protection device establishes data models of different protection units according to the difference among the protection units, wherein the data models comprise a differential protection data model, an impedance protection data model and a direction protection model; the data output by the unconventional mutual inductor of the intelligent substation is directly switched in the relay protection device in a digital mode through a combination unit and via a switch or without via a switch, the relay protection device performs mathematical operation according to the sampling value data of voltage and current input into the unconventional mutual inductor, and the waveform coefficient of a sampling value is calculated according to the data models of the different protection units; and the relay protection device judges the size and fluctuation range of a formed waveform coefficient value to judge whether relay protection is shut.

Description

technical field [0001] The invention relates to a method for identifying failure of sampling value data of an intelligent substation based on a waveform coefficient equation applied to relay protection, and belongs to the technical field of relay protection. Background technique [0002] With the rapid development of substation automation and network communication technology, and the promulgation and implementation of the IEC61850 standard system, traditional substations are gradually transitioning to smart substations. As the foundation and important part of smart substation, unconventional transformer has received extensive attention in its development and application. In addition, with the promulgation of international and domestic standards related to unconventional transformers, relevant applied research and applications have been gradually launched. [0003] Unconventional transformers have the advantages of compact structure, superior insulation performance, anti-ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
Inventor 樊占峰杨恢宏王定国田盈余高旺雷振锋吴双惠倪传坤
Owner XJ ELECTRIC
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