CN104319887A - Optical fiber chain scission anomaly judgment method for intelligent transformer substation - Google Patents

Abstract

The invention relates to the field of intelligent substation data exchange network, in particular to a method for judging the abnormality of optical fiber link disconnection in the intelligent substation. The smart substation online analysis and decision-making system has been popularized and used in the existing smart substation, but the existing smart substation online analysis and decision-making system has not yet introduced the communication network topology of the smart substation, which is the key to the identification and analysis of the fault of the fiber optic link in the smart substation. caused difficulties. According to the relevant technical specifications of the State Grid Corporation's smart substation and combined with engineering practice, the present invention designs the network topology diagram of the smart substation, develops a single-interval dynamic visualization network topology platform for the smart substation, and controls the communication methods and data transmission between smart electronic devices in the smart substation. The content is dynamically visualized and simulated. The invention is simple in design and easy to implement, has good compatibility with existing domestic and foreign intelligent substations and on-line analysis and decision-making systems for intelligent substations, and has broad application and promotion prospects.

Description

A method for judging the abnormality of optical fiber disconnection in smart substations

technical field

The invention relates to the field of data exchange networks of intelligent substations, in particular to a method for judging abnormality of optical fiber link disconnection in intelligent substations. the

Background technique

According to the overall layout and requirements of the State Grid Corporation of China for the future construction and development of electric power in my country, smart substations will be a new development direction for future substations. The biggest feature of the smart substation is the intelligence of the primary equipment, the networking of the secondary equipment and its advanced applications. Secondary equipment networking refers to optical fiber network communication between substation bay layers and between bay layer and process layer based on IEC61850 network communication technology. With the help of this technology, smart substations can achieve a high degree of information sharing. Network topology is the core of smart substation network communication. At present, the online analysis and decision-making system of smart substations has been promoted and used in existing smart substations, but the existing online analysis and decision-making system of smart substations has not yet introduced the communication network topology of smart substations. and analysis posed difficulties. the

Contents of the invention

Aiming at the disadvantages of the prior art that it is difficult to identify and analyze the faults of optical fiber disconnection in smart substations, the present invention provides a method for judging the abnormality of optical fiber disconnection in smart substations. It can quickly identify the optical fiber that has an abnormal link break.

Technical scheme of the present invention is:

A method for judging abnormality of optical fiber link disconnection in a smart substation, characterized in that it includes the following steps:

(a) Establish a single-bay dynamic visualization network topology platform for smart substations;

(a-1) With the background monitoring server, merging unit, intelligent terminal, measurement and control device, protection device, wave recording device and switch of the smart substation as logical nodes, the sampling communication network, general object-oriented substation event communication network and production industry The connection relationship of the message communication network draws the topology diagram of the smart substation communication network for the logical branch;

Among them, the sampling communication network, referred to as the SV network, can sample the input according to the specified sampling rate; the general object-oriented substation event communication network, referred to as the GOOSE network, is used for free exchange of information between devices of different manufacturers, and in the digital substation Among them, the network is used to transmit tripping signals, blocking signals, etc., and has the characteristics of fast and reliable message transmission; the manufacturing industry message communication network, referred to as the MMS network, is mainly used for information communication in the industrial field;

(a-2) Use Flash software to create a single-bay dynamic visualization network topology platform for smart substations according to the network topology diagram in step (a). Distinguish display;

(b) Determine the faulty line of the smart substation where the abnormal fiber link is broken;

(b-1) Input the communication fault signal displayed by the online analysis and decision-making system of the smart substation into step (a-2) the single-interval dynamic visualization network topology platform of the smart substation, and obtain the suspected faulty line of the optical fiber broken link;

(b-2) Manually check step (b-1) suspected faulty lines one by one until the faulty line of the smart substation with abnormal optical fiber disconnection is determined.

Specifically, the merging unit in step (a-1) includes the bus merging unit and the bay merging unit, and the smart terminal includes the smart terminal of the bay, Mother voltage transformer intelligent terminal, Bus voltage transformer intelligent terminal and bus tie intelligent terminal, measurement and control devices include electric energy meter, local interval protection measurement and control machine and public measurement and control machine, protection devices include busbar protection machine, wave recording device includes fault wave recorder, switch includes station control layer switch , the public exchange of the whole station, the public exchange of the process layer, the switch of the bus connection interval and the exchange of the interval. in, Mother voltage transformer intelligent terminal for short Mother PT intelligent terminal, Mother voltage transformer intelligent terminal for short The parent PT smart terminal.

Specifically, the network topology map in step (a-1) also includes mother voltage transformer, Bus voltage transformer, line voltage transformer, line current transformer, equipment body and cable network. in, Mother voltage transformer for short mother PT, Mother voltage transformer for short Mother PT, the line voltage transformer is called line PT for short, and the line current transformer is called line CT for short.

Specifically, step (a-1) in the network topology diagram parent PT and The main PT is connected to the bus merging unit in one direction through the link; the line PT and the line CT are connected to the merging unit in the bay through the link in one direction; the equipment body is connected to the intelligent terminal in the bay in one direction through two reverse links; Bus merging unit, bus protection machine, fault filter, local interval switch, parent PT intelligent terminal, The mother PT intelligent terminal and the bus coupler interval switch are connected to the public switch on the process layer through 2 reverse links respectively; ; The switch at the station control layer is bidirectionally connected to the public measurement and control machine, the local interval protection monitoring machine and the background monitoring server through links;

The bus protection machine is connected to the intelligent terminal of the bay and the intelligent terminal of the bus tie through the link; the intelligent terminal of the bay is connected to the protection measurement and control machine of the bay through two reverse links; One-way connection between the link and the bus coupler switch;

The bus merging unit is unidirectionally connected to the bay merging unit, bus protection machine and fault recorder via links; the bay merging unit is unidirectionally connected to the bay protection measurement and control machine, electric energy meter and fault recorder via links ;

The merging unit of this bay, the protection measurement and control machine of this bay and the intelligent terminal of this bay are respectively connected to the switch of this bay via 2 reverse links in one direction.

Beneficial effects of the present invention: According to the relevant technical specifications of the State Grid Corporation of China's smart substation and combined with engineering practice, the present invention designs the network topology diagram of the smart substation, develops a single-interval dynamic visualization network topology platform for the smart substation, and utilizes the network topology platform to monitor each of the smart substations. The communication method and data transmission content between intelligent electronic devices are dynamically visualized and simulated. When in use, input a communication fault signal to the network topology platform, and the network topology platform will automatically display the relevant communication lines, realizing the visualization of the abnormality of the fiber optic link disconnection in the smart substation, which greatly facilitates the work of the operator and will help the online analysis and decision-making of the smart substation in the future The further development of the system is of great significance. The invention is simple in design and easy to implement, has good compatibility with existing domestic and foreign intelligent substations and on-line analysis and decision-making systems for intelligent substations, and has broad application and promotion prospects.

Description of drawings

FIG. 1 is a topological diagram of a communication network of a smart substation according to the present invention.

Among them, links 1, 2, and 3 are MMS networks, links 30, 31, 32, 33, 34, 35, and 36 are SV networks, and links 4, 5, 6, 7, 8, 9, 10, 13, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 37, 38, 39, 40, 41, 42, 43, 44, 45 and 46 are GOOSE networks, link 11 , 12, 14, 15, 16 and 17 are cable networks.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

Referring to Fig. 1, the communication network topology diagram of the intelligent substation of the present invention is designed and established. In this network topology diagram, parent PT and The bus PT is connected to the bus merging unit in one direction via links 17 and 16 respectively; the line PT and line CT are connected to the merging unit in this bay through links 15 and 14 respectively; the equipment body is connected to the intelligent The terminal is connected in one direction; the bus merging unit passes through links 28 and 37, the bus protection machine passes through links 27 and 26, the fault filter passes through links 25 and 38, and the switchboard of this interval passes through links 21 and 22. The parent PT intelligent terminal via links 42 and 8, The parent PT intelligent terminal is unidirectionally connected to the process-layer public switch through links 41 and 7, and the bus-connection interval switch is respectively connected to the process layer public switch through links 45 and 5; The switch is connected to the public measurement and control machine in one direction; the station control layer switch is connected to the public measurement and control machine, the protection monitoring machine of this interval and the background monitoring server in two directions through links 2, 3 and 1 respectively.

The bus protection machine is connected to the intelligent terminal of the bay and the intelligent terminal of the bus tie through links 13 and 40 respectively; Roads 44 and 6 are unidirectionally connected to the bus tie interval switch.

The bus merging unit is unidirectionally connected to the bay merging unit, bus protection machine and fault recorder via links 34, 35 and 36; the bay merging unit is respectively connected to the bay protection measurement and control machine, The electric energy meter and the fault recorder are connected in one direction.

The merging unit of this interval is via links 23 and 24, the protection and control machine of this interval is via links 19 and 20, and the intelligent terminal of this interval is connected to the switchboard of this interval via links 43 and 18 respectively.

In the smart substation communication network topology diagram of this embodiment, links 1, 2, and 3 are MMS networks, links 30, 31, 32, 33, 34, 35, and 36 are SV networks, and links 4, 5, 6, 7, 8, 9, 10, 13, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 37, 38, 39, 40, 41, 42, 43, 44, 45 and 46 are GOOSE networks, and links 11, 12, 14, 15, 16 and 17 are cable networks.

In this embodiment, the abnormal analysis process of optical fiber link disconnection in the smart substation is as follows:

1. Design and establish the communication network topology diagram of the smart substation.

2. Use Flash software to create a single-interval dynamic visualization network topology platform for smart substations according to the network topology map; the single-interval dynamic visualization network topology platform for smart substations can distinguish communication lines related to communication failure signals according to the input communication failure signals .

3. When abnormal communication occurs in the smart substation, the communication fault signal displayed by the online analysis and decision-making system of the smart substation is input into the single-interval dynamic visualization network topology platform of the smart substation, and the suspected faulty line of the fiber link is obtained.

4. Manually check the suspected faulty lines one by one until the actual faulty line is determined.

In this embodiment, the smart substation is a 220kV twin-tower smart substation built in Handan, Hebei, and the smart substation online analysis and decision-making system used is the PRS-7000 system developed by Changyuan Shenrui Jibao Company.

The main innovation of the present invention lies in the design and establishment of the communication network topology diagram of the smart substation. According to the relevant technical specifications of the smart substation of the State Grid Corporation of China and in combination with the actual engineering situation, the network topology diagram of the smart substation is drawn. According to the existing online analysis and decision-making system of the smart substation The suggested communication fault signal can be combined with the network topology diagram to obtain the suspected faulty line of the optical fiber broken link. For example, in this embodiment, the intelligent substation online analysis and decision-making system displays the information of "smart terminal receiving, protection, measurement and control device GOOSE disconnection (network)" information, and the intelligent substation network topology map can be used to determine that links 19 and 43 are suspected faulty lines, and workers can check Lines 19 and 43 of the GOOSE network to determine the actual fault line.

It should be noted that it is common knowledge in this field to use Flash software to make a network topology map and create a smart substation single-bay dynamic visualization network topology platform based on the network topology map. above steps.

The implementations described above are only preferred embodiments of the present invention, rather than an exhaustive list of feasible implementations of the present invention. For those skilled in the art, any obvious changes made without departing from the principle and spirit of the present invention should be considered to be included in the protection scope of the claims of the present invention. the

Claims (1)

1. An intelligent substation optical fiber broken link abnormity judgment method is characterized by comprising the following steps:

(a) establishing an intelligent substation single-interval dynamic visual network topology platform;

(a-1) taking a background monitoring server, a merging unit, an intelligent terminal, a measurement and control device, a protection device, a wave recording device and a switch of an intelligent substation as logic nodes, and drawing a communication network topological graph of the intelligent substation as a logic branch by taking the connection relation of an SV network, a GOOSE network and an MMS network;

(a-2) manufacturing an intelligent substation single-interval dynamic visual network topology platform according to the network topology map in the step (a-1) by using Flash software, wherein the intelligent substation single-interval dynamic visual network topology platform can be used for differentially displaying communication lines related to input communication fault signals;

(b) judging a fault line with abnormal optical fiber chain breakage of the intelligent substation;

(b-1) inputting a communication fault signal displayed by an online analysis decision system of the intelligent substation into the single-interval dynamic visual network topology platform of the intelligent substation in the step (a-2) to obtain an optical fiber broken link suspected fault line;

(b-2) manually checking the suspected fault lines in the step (b-1) one by one until the fault line with optical fiber chain breakage abnormity of the intelligent substation is determined;

the merging unit comprises a bus merging unit and a local interval merging unit, and the intelligent terminal comprises a local interval intelligent terminal,A mother PT intelligent terminal,The monitoring device comprises an electric energy meter, a local interval protection monitoring machine and a public monitoring machine, the protection device comprises a bus protector, the wave recording device comprises a fault wave recorder, and the switch comprises a station control layer switch, a total station public switch, a process layer public switch, a bus coupler interval switch and a local interval switch;

the network topology further includesA mother PT,A mother PT, a line CT, an equipment body and a cable network;

step (a-1) in the network topology mapMother PT andthe bus PT is connected with the bus merging unit in a one-way mode through links (17) and (16) respectively; the line PT and the line CT are respectively connected with the interval merging unit in a unidirectional way through links (15) and (14); the equipment body is connected with the interval intelligent terminal in a one-way mode through links (11) and (12); the bus merging unit is connected with the bus protector through the links (27) and (26), the fault filter is connected with the links (25) and (38), the interval exchanger is connected with the bus merging unit through the links (28) and (37),the mother PT intelligent terminal is connected with the network through the links (42), (8),the mother PT intelligent terminal is respectively connected with the process layer public switch in a one-way mode through links (41) and (7) and the mother connection interval switch through links (45) and (5); the process layer public switch is unidirectionally connected with the total station public switch and the public measurement and control machine through links (9), (10), and (39), (4) respectively; the station control layer switch is respectively in bidirectional connection with the public monitoring machine, the interval protection monitoring machine and the background monitoring server through links (2), (3) and (1);

the bus protector is respectively connected with the interval intelligent terminal and the bus-coupled intelligent terminal in a one-way mode through links (13) and (40); the interval intelligent terminal is connected with the interval protection measuring and controlling machine in a one-way mode through links (46) and (29); the bus-coupled intelligent terminal is connected with the bus-coupled interval switch in a one-way mode through links (44) and (6);

the bus merging unit is respectively connected with the interval merging unit, the bus protector and the fault recorder in a unidirectional way through links (34), (35) and (36); the interval merging unit is respectively connected with the interval protection measuring and controlling machine, the electric energy meter and the fault recorder in a one-way mode through links (30), (31) and (32);

the interval merging unit is connected with the interval exchanger in a unidirectional way through links (23) and (24), the interval protection measuring and controlling machine is connected with the interval exchanger in a unidirectional way through links (19) and (20), and the interval intelligent terminal is connected with the interval exchanger in a unidirectional way through links (43) and (18).