Smart substation process level secondary circuit fault diagnosis method

A technology for secondary circuit faults and smart substations, applied in circuit devices, electrical components, digital transmission systems, etc., can solve problems such as power grid security threats, economic losses, power grid disconnection and voltage loss, and achieve reliable operation with simple methods The effect of reliable, effective and fast positioning of communication fault points

Inactive Publication Date: 2014-10-08
STATE GRID CORP OF CHINA +1
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Problems solved by technology

At present, from the point of view of the actual operation of the power system, there are still many accidents caused by power relay protection, resulting in partial power grid disconnection and voltage loss, which brings a lot of economic losses and poses a great threat to the safety of the power grid.

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  • Smart substation process level secondary circuit fault diagnosis method
  • Smart substation process level secondary circuit fault diagnosis method
  • Smart substation process level secondary circuit fault diagnosis method

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Embodiment Construction

[0033] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] Such as figure 1 As shown, the present invention provides a method for diagnosing secondary circuit faults in the process layer of an intelligent substation, comprising the following steps:

[0035] S1: Classify and model communication equipment

[0036] The process layer of the smart substation has two communication modes: communication through fiber optic Ethernet switch network; point-to-point communication through fiber optic direct connection. Both patterns can be equivalent to figure 2 the form shown.

[0037] The equipment involved in the communication process includes five aspects: protection device, intelligent terminal, merging unit, optical fiber switch and optical fiber. Except that optical fiber is pure information transmission equipment, others are information processing or forwarding equipment, which can be abstra...

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Abstract

The invention provides a smart substation process level secondary circuit fault diagnosis method. The method includes the following steps that a physical connection model is built in a process level network; an SCD file is parsed, and the logic connection relation among devices is analyzed; on the basis of a process level communication topology structure, the logic connection abnormity is mapped to the physical connection according to the related communication link abnormal information, the network topology scanning is conducted, and communication link abnormal nodes are analyzed. According to the smart substation process level secondary circuit fault diagnosis method, the sending and receiving link relation of the process level information is analyzed through the SCD file, the information transmission path of information is searched out in combination with the topological structure, abstract and modeling are conducted on switches, devices and links and communication units in the secondary circuit, the topological structure of the communication network is built, the link scission alarm information of a receiving device is combined, and the fault unit is judged out through comprehensive diagnosis. The whole method is simple, reliable and efficient, contributes to quick communication fault point positioning, and guarantees reliable operation of the secondary circuit of the smart substation.

Description

technical field [0001] The invention belongs to the field of secondary networks of intelligent substations, and in particular relates to a method for diagnosing faults of secondary circuits in process layers of intelligent substations. Background technique [0002] The basis of the smart substation is a digital substation based on IEC61850, which is the latest requirement for the technical form of the substation in the smart grid environment. The information transmission mode of the smart substation is changed from the electrical signal transmitted by the cable in the conventional substation to the digital signal transmitted by the optical fiber, and realizes the distribution of the secondary system of the substation such as monitoring interlocking, protection sampling, tripping and closing, starting, and locking in a digital way. Features. [0003] The relay protection system is an important part of the power system. It plays a key role in ensuring the safe and economical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/24H02J13/00
CPCY02E60/00Y04S10/16
Inventor 王延安高兆丽王强刘清张晓明潘东明李源
Owner STATE GRID CORP OF CHINA
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