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Fault line selection device applied to intelligent substation

A technology for intelligent substation and grounding line selection, which is applied in directions such as fault locations to reduce construction workload, save zero-sequence current signal cables, and achieve good real-time performance.

Inactive Publication Date: 2016-01-06
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO +2
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Problems solved by technology

[0004] The present invention aims at the situation that the existing line selection device cannot meet the communication requirements of IEC61850 standardization in intelligent substations, and provides a new type of grounding line selection device suitable for intelligent substations. Each module of the line device realizes the standardization of the line selection device

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  • Fault line selection device applied to intelligent substation

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Embodiment Construction

[0023] Such as figure 1 As shown, a grounding line selection device suitable for smart substations includes communication module one 1, Fourier transform module 2, communication module two 3, communication module three 4, line selection module 5 and communication module four 6, wherein,

[0024] The communication module one 1 is connected with the Fourier transform module 2, adopts IEC618509-2SMV sampling value service to obtain the neutral point voltage signal from the local intelligent unit 7, and sends the neutral point voltage signal to the Fourier transform module;

[0025] The Fourier transform module 2 is connected with the line selection module 5, and the Fourier transform module 2 transforms the input discrete time-domain voltage sampling signal into a frequency-domain signal, and then undergoes inverse transform to obtain the fundamental wave and the frequency domain signal of the voltage signal. The amplitude and phase information of each harmonic are sent to the li...

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Abstract

The invention discloses a fault line selection device applied to an intelligent substation, which comprises a first communication module, a Fourier transformation module, a second communication module, a third communication module, a line selection module and a fourth communication module, wherein the first communication module is connected with the line selection module via the Fourier transformation module; and the second communication module and the third communication module are respectively connected with the fourth communication module and the line selection module. According to the fault line selection device with the above structure, with the full help of the existing architecture system of the intelligent substation, each module of the line selection module is designed according to an IEC 61850 standard, and standardization of the line selection device is realized.

Description

technical field [0001] The invention relates to a single-phase grounding fault line selection device of a distribution network system, in particular to a new grounding line selection device suitable for IEC61850 standardization of intelligent substations. Background technique [0002] Most of the 6kV-66kV distribution network in my country adopts the small current grounding method, and the neutral point is mainly grounded through the arc suppression coil. Aiming at the problem of single-phase ground fault line selection in distribution network, many domestic scholars and institutions have proposed different methods of line selection technology and line selection devices after research, but there are few research results on ground line selection devices suitable for smart substations. . As the construction of smart substations based on the IEC61850 standard is gradually rolled out in my country, the traditional line selection device for small current grounding systems can no...

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Application Information

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IPC IPC(8): G01R31/08
Inventor 吕亮施月泉俞永军傅三川赵川江李刚秦建松朱松涛陈瑛张锴玮陶佳燕
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO
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