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Low-voltage distribution network protection method and medium based on wide-area measurement information

A low-voltage distribution network, wide-area measurement technology, applied in emergency protection circuit devices, information technology support systems, electrical components, etc., can solve the problem of insufficient reliability of distribution network protection methods, and achieve the effect of improving the maintenance level

Active Publication Date: 2021-10-22
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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Problems solved by technology

[0004] Aiming at the defects of existing distribution network fault identification and positioning, the present invention proposes a low-voltage distribution network protection method and medium based on wide-area measurement information based on the wide-area measurement data of the distribution automation platform and the principle of current differential. Solving the technical problems of insufficient reliability of the existing distribution network online monitoring and protection methods

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Embodiment Construction

[0054] Before any embodiment of the invention is described in detail, it is to be understood that the invention is not limited in application to the details of construction shown in the following description or in the accompanying drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative improvements belong to the protection scope of the present invention.

[0055] A low-voltage distribution network protection method based on wide-area measurement information includes the following steps:

[0056] Step 1: Construct the component correlation matrix in the distribution network:

[0057] According to the connection relationship between different components and electrical quantity measurement units in the distribution network, construct the topology relationship matrix R;

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Abstract

The invention discloses a low-voltage distribution network protection method and medium based on wide-area measurement information, and relates to the field of power systems and automation thereof. Aiming at the defects of fault identification and location in the existing distribution network, the current differential principle is used to solve the technical problem of insufficient reliability of the existing online monitoring and protection methods of the distribution network. The present invention includes constructing a topological structure correlation matrix R, a measurement unit remote control function switching matrix B, a transformer transmission coefficient correction matrix D, a measurement voltage matrix U and a measurement current matrix I, forming a fault location judgment criterion, and locating the fault location in Components, and determine the fault phase, based on the remote control function switching matrix B, construct the associated circuit breaker tripping strategy after the fault. The invention can accurately judge the fault position in the distribution network and improve the operation and maintenance level of the distribution network.

Description

technical field [0001] The invention relates to the field of electric power system and automation thereof, in particular to a low-voltage distribution network protection method and medium based on wide-area measurement information. Background technique [0002] The 35kV and below voltage level distribution network is the power supply system for most cities and rural areas, and plays a vital role in ensuring the production of all walks of life and people's lives. At present, the power supply loss of power distribution system is large, the degree of automation is low, and the fault recovery is slow, which seriously affects the reliability of power supply. In addition, with the continuous maturity of power electronics technology and new energy generation technology, more and more distributed power sources are connected to the distribution network, which greatly increases the complexity of the distribution network system. The traditional distribution network is a single power s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J13/00H02H7/26G01R31/08
CPCG01R31/086H02H7/26H02J13/00002H02J13/0004Y02E60/00Y04S10/20Y04S10/52
Inventor 李世龙张华龙呈高艺文苏学能
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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