KR101356683B1 - System for analysing iec61850 network - Google Patents

Abstract

An IEC61850 network analysis system is provided. The IEC61850 network analysis system includes: an input unit for receiving data which are inputted and outputted to an access switch for relaying communication between communication components comprising an IEC61850 network; a first analysis unit for analyzing a protocol used when an intelligent electronic device operates using the data; and a second analysis unit for analyzing network bandwidth use ratio by the communication component using the data when an electric substation event is generated.

Description

IC6129K Network Analysis System {SYSTEM FOR ANALYSING IEC61850 NETWORK}

The present invention relates to an IEC61850 network analysis system, and more particularly to an IEC61850 network analysis system for analyzing the IEC61850 based digital substation network environment.

Substation automation system is a system that can reduce the failure factor and the complexity of operation by performing the operation and monitoring of substation facilities by using digital communication. IEC 61850 was established in 2005 as an international standard describing these substation automation systems. The IEC 61850 international standard has the following characteristics compared to other existing standards. In addition to the standardization of data names and service names, IEC 61850 facilitates manufacturers' interoperability between different devices through XML-based engineering and reduces the errors in data interpretation by assigning meaning to data names. In addition, the application level and the actual communication are separated to form a future-oriented standard to flexibly accommodate the emerging communication technology in the future.

IEC 61850 is moving away from the conceptual phase and applied to substations in many parts of the world and beyond its substations, extending its influence to other utility industries such as wind and hydro, as well as communication between substations or communication between substations and upper control stations.

However, the current substations are not analyzed for the communication performance and error conditions among the communication components constituting the IEC 61850 network.

The technical problem to be achieved by the present invention is to analyze the operation of the communication components constituting the IEC61850 network on the digital substation in real time, to generate an evaluation index by analyzing the network bandwidth usage rate, and to determine whether data transmission errors between communication components The present invention provides an IEC61850 network analysis system capable of diagnosing and generating evaluation indexes of data communication indexes for each communication component.

According to an aspect of the present invention, an input unit for receiving input and output data to and from the access switch for relaying communication between communication components constituting the IEC61850 network; IEC61850 network comprising a first analysis unit for analyzing the protocol used in the operation of the intelligent electronic device using the data and a second analysis unit for analyzing the network bandwidth usage ratio of each communication component when the substation event occurs using the data Provide an analysis system.

The second analyzer may calculate an average bandwidth usage ratio and a maximum bandwidth usage ratio for each communication component.

The second analyzer may generate a network bandwidth usage evaluation index by using the average bandwidth usage ratio and the maximum bandwidth usage ratio for each communication component.

If the ratio value of at least one of the average bandwidth usage ratio and the maximum bandwidth usage ratio for each communication component exceeds a preset ratio value, the second analyzer may evaluate that the band usage index of the corresponding communication component is not good. have.

The communication component may further include a communication index evaluation unit for diagnosing whether a data transmission error occurs using the data transmission / reception time of each communication component.

The communication index evaluator may diagnose whether the data transmission error occurs based on whether any data is received by the desired communication component within a predetermined time from the transmission time.

The communication index evaluation unit may calculate the average data transmission time and the maximum transmission time for each communication component.

 The communication index evaluation unit may generate a communication index evaluation index for each communication component using the average transmission time and the maximum transmission time.

The communication index evaluator may evaluate that the communication index of the corresponding communication component is not good when at least one of the average transmission time and the maximum transmission time exceeds a preset reference average transmission time and the maximum transmission time.

The present invention, the IEC61850 network analysis system can analyze the operation of the communication components constituting the IEC61850 network on the digital substation in real time, can generate the evaluation index by analyzing the network bandwidth usage ratio, data transmission error between the communication components Diagnosis may be generated, and an evaluation index may be generated for the data communication index for each communication component.

1 is a network connection diagram of the IEC61850 network analysis system according to an embodiment of the present invention;
2 is a block diagram of an IEC61850 network analysis system according to an embodiment of the present invention;
3 is a graph of the amount of data according to a protocol used in the operation of an intelligent electronic device according to an embodiment of the present invention;
4 is a graph showing a network bandwidth usage ratio for each communication component when a substation event occurs according to an embodiment of the present invention;
5 is a network bandwidth usage evaluation index according to an embodiment of the present invention,
6 is a graph for diagnosing whether a data transmission error occurs according to an embodiment of the present invention;
7 is a communication index evaluation index for each communication component according to an embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

Figure 1 is a network connection diagram of the IEC61850 network analysis system according to an embodiment of the present invention, Figure 2 is a block diagram of the IEC61850 network analysis system according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention Figure 4 is a graph of the amount of data according to the protocol used in the operation of the intelligent electronic device according to the embodiment of the present invention, Figure 4 is a graph of the network bandwidth usage ratio of each communication component when the substation event occurs according to an embodiment of the present invention, Figure 5 is Network bandwidth usage evaluation index according to an embodiment, Figure 6 is a graph for diagnosing whether a data transmission error occurs according to an embodiment of the present invention, Figure 7 is a communication index evaluation for each communication component according to an embodiment of the present invention It is an indicator.

Referring to FIG. 2, the IEC61850 network analysis system according to an embodiment of the present invention includes an input unit 10 that receives data input and output to an access switch relaying communication between an intelligent electronic device and a higher system, and intelligently uses the data. The first analysis unit 20 for analyzing a protocol used in the operation of the electronic device, the second analysis unit 30 for analyzing the network bandwidth usage rate for each communication component when a substation event occurs using the data, for each communication component It may be configured to include a communication index evaluation unit 40 for diagnosing whether a data transmission error occurs using the data transmission and reception time.

Referring to FIG. 1, the input unit 10 receives data input and output to an access switch relaying communication between communication components constituting the IEC61850 network. The communication components that make up the IEC61850 network may include intelligent electronic devices (IEDs), gateways, and human machine interfaces (HMIs).

The input unit 10 may receive data input and output to the access switch through a mirroring port connected to a network tap or an access switch. Data input to the input unit 10 may be input from a plurality of access switches, collected and transmitted to each analyzer, the communication index evaluator 40, and the storage, and may include a time tag.

The first analyzer 20 may analyze a protocol used when an intelligent electronic device operates by using data received from the input unit 10. The intelligent electronic device operates according to a predetermined step during operation, and the first analyzer 20 may analyze which protocol is used for each operation step of the intelligent electronic device.

Referring to FIG. 3, the intelligent electronic device operates through steps of time synchronization, protection element operation setting, monitoring facility operation detection, neighbor facility operation information reception, PING communication, neighbor facility operation information reception, and relay element operation. The first analysis unit 20 classifies the protocol type used by the intelligent electronic device into MMS, GOOSE, SV, SNTP, UTP, TCP, and other types, and analyzes the protocol used when performing the operation of each step.

In the initial time synchronization phase, communication is performed using SNTP, and then, in the protection element operation setting phase, communication of TCP is performed. The MMS and GOOSE method are used together in the monitoring facility motion detection phase, and the GOOSE method is used in the reception phase of adjacent facility motion information. In other words, it can be seen that the time synchronization and the protection element operation setting step, which is a preset step, perform communication through SNTP and TCP methods, and then the MMS and GOOSE communication methods are used in monitoring the substation facilities.

The second analyzer 30 may analyze the network bandwidth usage ratio of each communication component when a substation event occurs using the data received from the input unit 10.

Referring to FIG. 4, when a substation event occurs, substation events such as IED # 3 relay element setting, IED # 3 DS operation, IED # 2 Ping communication, IED # 3 DS operation, and IED # 1 relay element operation occur. do. The second analysis unit 30 analyzed the network usage ratios of the communication components HMI, GATEWAY, IED # 1, IED # 2, and IED # 3 when each substation event occurred.

The second analyzer 30 may calculate an average bandwidth usage ratio and a maximum bandwidth usage ratio for each communication component. The second analysis unit 30 uses the network bandwidth usage ratio for each communication component used in the occurrence of the substation event, and calculates the average bandwidth usage ratio and the maximum bandwidth usage ratio for each communication component during the substation event occurrence period or any predetermined period. Can be calculated.

The second analyzer 30 may generate a network bandwidth usage evaluation index by using the calculated average bandwidth usage ratio and the maximum bandwidth usage ratio for each communication component. When the ratio value of the average bandwidth usage ratio or the maximum bandwidth usage ratio exceeds the preset ratio value, the second analyzer 30 may evaluate that the band usage index of the corresponding communication component is not good.

Alternatively, when the ratio value of the average bandwidth usage ratio and the maximum bandwidth usage ratio exceeds the preset ratio value, the second analyzer 30 may evaluate that the band usage index of the corresponding communication component is not good.

Referring to FIG. 5, the average bandwidth usage ratio is the highest with GATEWAY at 40%, but the maximum bandwidth usage ratio is the highest with IED # 2 at 80%. If the predetermined ratio value of the average bandwidth usage ratio and the maximum bandwidth usage ratio is 50%, since the maximum bandwidth usage ratio of IED # 2 exceeds the predetermined ratio value at 80%, the second analysis unit 30 determines the IED #. The band usage indicator of 2 can be evaluated as poor.

The communication index evaluator 40 may diagnose whether a data transmission error occurs based on whether any data is received by the target communication component within a predetermined time from the transmission time. The communication index evaluation unit 40 uses a time tag included in the data for each communication component or measures a transmission / reception time, and generates a data transmission error based on whether the corresponding data reaches the desired communication component within a predetermined time. Diagnosis can be made.

Referring to FIG. 6, the arrow direction indicated upwards means that data is transmitted from the corresponding communication component, and the arrow direction indicated downwards indicates that data is received from the corresponding communication component. First, when IED # 1 transmits data, no data transmission error occurs because other communication components transmit all data within 1.5 ms. When the IED # 2 transmits data, the IED # 1 received the data in 2.5 ms past a predetermined time (1.5 ms), so the communication index evaluation unit 40 can diagnose that a data transmission error occurred in the IED # 1. have. In addition, when the HMI transmits data, since the IED # 3 receives the data at 3.2 ms after a predetermined time (1.5 ms), the communication index evaluation unit 40 may diagnose that an error occurs in the IED # 3.

The communication index evaluation unit 40 may generate a communication index evaluation index for each communication component by calculating a data transmission average and a maximum transmission time for each communication component.

The communication index evaluation unit 40 defines the interval between the data transmission time and the reception time as the transmission time using the time tag included in the data, and calculates the average transmission time and the maximum transmission time of the data for each communication component. Can be. The communication index evaluation unit 40 may evaluate that the communication index of the corresponding communication component is not good when the calculated average transmission time and the maximum transmission time exceed the preset reference transmission time.

Referring to FIG. 7, if the reference average transfer time is set to 1.5 ms and the reference maximum transfer time is set to 1.8 ms, the average transfer time and the maximum transfer time of IED # 1, IED # 3, and HMI are based on the reference average transfer time and the baseline transfer time. Since the maximum transfer time was exceeded, the communication index evaluation unit 40 evaluated that the communication indexes of IED # 1, IED # 3, and HMI were not good.

As used in this embodiment, the term " portion " refers to a hardware component such as software or an FPGA (field-programmable gate array) or ASIC, and 'part' performs certain roles. However, 'part' is not meant to be limited to software or hardware. &Quot; to " may be configured to reside on an addressable storage medium and may be configured to play one or more processors. Thus, by way of example, 'parts' may refer to components such as software components, object-oriented software components, class components and task components, and processes, functions, , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided in the components and components may be further combined with a smaller number of components and components or further components and components. In addition, the components and components may be implemented to play back one or more CPUs in a device or a secure multimedia card.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

10: Input unit
20: first analysis unit
30: second analysis unit
40: communication index evaluation unit
100: IEC61850 network analysis system

Claims (9)

An input unit configured to receive data input and output to an access switch relaying communication between communication components constituting the IEC61850 network;
A first analyzer for analyzing a protocol used in the operation of the intelligent electronic device using the data;
IEC61850 network analysis system comprising a second analysis unit for analyzing the network bandwidth usage ratio of each communication component when a substation event occurs using the data.
The method of claim 1,
The second analysis unit IEC61850 network analysis system for calculating the average bandwidth usage ratio and the maximum bandwidth usage ratio for each communication component.
3. The method of claim 2,
The second analysis unit IEC61850 network analysis system for generating a network bandwidth usage evaluation index by using the average bandwidth usage ratio and the maximum bandwidth usage ratio for each communication component. The method of claim 3,
The second analyzer evaluates that the band usage indicator of the corresponding communication component is not good when the ratio value of at least one of the average bandwidth usage ratio and the maximum bandwidth usage ratio for each communication component exceeds a preset ratio value. IEC61850 network analysis system.
The method of claim 1,
IEC61850 network analysis system further comprising a communication index evaluation unit for diagnosing whether a data transmission error occurs using the data transmission and reception time for each communication component.
The method of claim 5,
And the communication index evaluation unit diagnoses whether or not the data transmission error occurs based on whether any data has been received by the desired communication component within a predetermined time from the time of transmission.
The method of claim 5,
The communication index evaluation unit IEC61850 network analysis system for calculating the average transmission time and the maximum transmission time for each communication component.
The method of claim 7, wherein
The communication index evaluation unit IEC61850 network analysis system for generating a communication index evaluation index for each communication component using the average transmission time and the maximum transmission time.
The method of claim 8,
The IEC 61850 network analysis system for evaluating that the communication index of the communication component is not good when at least one of the average transmission time and the maximum transmission time exceeds a preset reference average transmission time and the maximum transmission time. .

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