Branch coefficient calculation method based on real-time fault data

A real-time fault and branch coefficient technology, which is applied in parameter calibration/setting, automatic disconnection of emergency protection devices, electrical components, etc., to solve the problems that the protection setting personnel cannot check, and the grid setting cannot be obtained.

Pending Publication Date: 2020-03-17
GUANGXI POWER GRID CORP +1
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Problems solved by technology

The protection setting personnel cannot obtain the setting value of the branch coefficient in the actual operation of the power gri

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  • Branch coefficient calculation method based on real-time fault data

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[0021] In order to better understand the present invention, the following further describes the present invention in conjunction with the accompanying drawings and specific embodiments:

[0022] Such as figure 1 As shown, a branch coefficient calculation method based on real-time fault data includes the following steps: a branch coefficient calculation method based on real-time fault data includes the following steps:

[0023] Step S1, obtain real-time fault lines from the energy management system,

[0024] Obtaining real-time fault lines from the energy management system refers to obtaining fault information from the fault judgment module of the energy management system. The fault judgment module of the energy management system may have integrated intelligent alarm, accident jump, and fault diagnosis modules. The present invention only obtains energy The data in the fault judgment module actually used by the management system, the way to obtain the real-time fault line from the ene...

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Abstract

The invention discloses a branch coefficient calculation method based on real-time fault data. Acquiring a real-time fault line from an energy management system; searching other lines on the power supply paths on the two sides of the fault line according to the energy management system model topology; calling the waveform list of the line protection device corresponding to the line on the power supply path, calling the waveform file of the line protection device corresponding to the line on the power supply path, calculating the fault current of the waveform file, and calculating the actual branch coefficient in the fault operation mode through real-time topology. According to the method, the actual analysis coefficient at the fault moment is obtained, and powerful help is provided for protection personnel to check the protection constant value.

Description

technical field [0001] The invention relates to the field of comprehensively utilizing real-time fault data by a master station to comprehensively process power system faults and check protection fixed values, in particular to a branch coefficient calculation method based on real-time fault data. Background technique [0002] When performing relay protection setting calculations in a complex power system wiring mode, it is often encountered that there is a branch circuit between the two protections coordinated by the upper and lower levels. According to the components connected to the branch current, the wiring mode and the impact on the system, The branch circuit is divided into boosting branch circuit and external draining branch circuit. In order to ensure the sensitivity of the current II section or the distance II section, and to ensure the selectivity, the influence of the branch circuit on the relay protection setting calculation must be taken into account. The branch...

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Application Information

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IPC IPC(8): H02H7/26H02H3/00
CPCH02H7/26H02H3/006
Inventor 刘斌李海勇蒋连钿毛建维谢华熊蕙李枫
Owner GUANGXI POWER GRID CORP
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