KR20240045863A - Digital Substation GOOSE Monitoring and Diagnosis Device and Method - Google Patents

Abstract

The digital substation GOOSE monitoring and diagnosis device of the present invention includes a GOOSE information receiving unit that receives GOOSE packets transmitted and received between IEDs in the digital substation; An information classification unit that identifies the desired GOOSE packet by checking whether the bibliographic information of the transmitted and received GOOSE packet meets analysis conditions; an information diagnosis unit that confirms whether the contents of the GOOSE packet extracted by the information classification unit meet diagnostic conditions and secures it as necessary information; and a diagnostic result display unit that derives a diagnostic result from necessary information, checks whether the diagnostic result meets an alarm condition, and notifies the user.

Description

Digital Substation GOOSE Monitoring and Diagnosis Device and Method}

The present invention relates to a digital substation GOOSE monitoring and diagnosis device and method for monitoring GOOSE packet information transmitted and received between devices in a digital substation and analyzing abnormal operation.

Figure 1 shows an interlock information transfer structure between devices such as a general IED.

Interlock information within a digital substation is a signal transmitted to each other through digital communication, and it is difficult for users to quickly understand the information, making it difficult to determine the cause of the inability to operate power equipment using interlock information, and taking measures to resolve the problem when it occurs. A delay problem arises.

Moreover, as shown in FIG. 1, the use of GOOSE information transmitted and received in an Ethernet switch network makes it difficult for users to quickly check the information. Therefore, there is a difficult problem in determining the appropriate operation of many IED/LID devices that use interlock information.

Conventional operating technology provides a logic UI that can check GOOSE reception information and processing within each IED/LID, allowing individual information to be confirmed, but in terms of overall digital substation operation, GOOSE information and processing existing within individual IEDs is possible. There was no proper method to comprehensively manage and supervise matters.

Republic of Korea Registered Publication No. 10-1869698

The present invention seeks to provide a digital substation GOOSE monitoring and diagnosis device that supports integrated management of GOOSE information and processing matters existing in individual IEDs in terms of overall digital substation operation.

A digital substation GOOSE monitoring and diagnosis device according to one aspect of the present invention includes a GOOSE information receiving unit that receives GOOSE packets transmitted and received between IEDs in a digital substation; An information classification unit that identifies the desired GOOSE packet by checking whether the bibliographic information of the transmitted and received GOOSE packet meets analysis conditions; an information diagnosis unit that confirms whether the contents of the GOOSE packet extracted by the information classification unit meet diagnostic conditions and secures it as necessary information; and a diagnostic result display unit that derives a diagnostic result from necessary information, checks whether the diagnostic result meets an alarm condition, and notifies the user.

Here, the 'interlock relationship between states (values)' is integrated with information about the interlock relationship between a plurality of states (values) referenced/used in the algorithm of the work performed by each device from all devices belonging to the digital substation. It may further include a storage unit that stores 'topology' for the data.

Here, the information diagnosis unit can diagnose the task of changing the states (values) applied to the entire digital substation in IEDs sharing the Ethernet switch network.

Here, the information diagnosis unit and the diagnosis result display unit will notify the user if an IED that changes the specific state (value) exists despite the GOOSE packet broadcast notifying the change to the specific state (value). You can.

Here, the information diagnosis unit and the diagnosis result display unit change a state (value) that is not specified in the 'information (topology) about interlock relationships between states (values)' regardless of the interlock information. IEDs can be identified and notified to the user.

Here, the information diagnosis unit and the diagnosis result display unit may confirm the discrepancy in the interlock operation between the specified states (values) and notify the user.

Here, the information diagnosis unit and the diagnosis result display unit may notify the user when the number of changes to a specific state (value) exceeds a predetermined number of times, or when the change frequency per unit time exceeds a predetermined standard.

A digital substation GOOSE monitoring and diagnosis method according to another aspect of the present invention includes receiving GOOSE packets transmitted and received between IEDs in a digital substation; Extracting desired GOOSE packets by checking whether the bibliographic information of the transmitted and received GOOSE packets meets analysis conditions; Confirming whether the contents of the extracted GOOSE packet meet diagnostic conditions and securing information necessary for detection diagnostic items; Deriving diagnostic results of surveillance diagnostic items from the obtained necessary information; And it may include a step of confirming whether the derived diagnostic result meets an alarm condition and notifying the user.

Here, in the step of deriving the diagnosis result, the task of changing the states (values) applied to the entire digital substation in IEDs sharing the Ethernet switch network can be diagnosed.

Here, the analysis condition is to confirm that it is a packet that specifies IEDs that change the state (value) of the digital substation, a packet that changes the state (value) of the digital substation, or a packet that notifies the use of the state (value) of the digital substation. It may be specifying something.

Here, the diagnostic condition may be for checking the interlock operation of each interlock relationship between states (values).

Here, the alarm condition is an alarm when there is a discrepancy in the interlock operation between states (values), an alarm when the number of changes of a specific state (value) exceeds a predetermined number of times, and an alarm when the frequency of changes per unit time of a specific state (value) exceeds a predetermined standard. If exceeded, it may contain one or more of the alarms.

If the digital substation GOOSE monitoring and diagnosis device according to the idea of the present invention of the above-described configuration is implemented, the advantage is that by monitoring/diagnosing integrated GOOSE information, a centralized interlock monitoring environment can be established to improve the ability to judge the situation when a problem occurs. There is.

In other words, the digital substation GOOSE monitoring and diagnostic device of the present invention collects digitized information of the digital substation and builds a monitoring and diagnostic system for the desired interlock information, enabling power facility operators to quickly check information and respond when a problem occurs.

Figure 1 is a structural diagram showing the transmission and reception structure of interlock GOOSE information of IED devices in a general digital substation.
Figure 2 is a structural diagram showing the transmission and reception structure of interlock GOOSE information using a digital substation GOOSE information monitoring and diagnosis device according to the spirit of the present invention.
Figure 3 is a block diagram showing an embodiment of a digital substation GOOSE information monitoring and diagnosis device according to the spirit of the present invention.
FIG. 4 is a flowchart showing the flow of the GOOSE Ethernet packet reception task performed by the GOOSE information receiving unit of FIG. 3.
FIG. 5 is a flowchart showing the flow of work for extracting packets suitable for diagnostic items performed by the information classification unit of FIG. 3.
Figure 6 is a flowchart showing the flow of work performed by the information diagnosis unit of Figure 3.
Figure 7 is a flowchart showing the flow of work performed by the diagnosis result display unit of Figure 3.
Figure 8 is a conceptual diagram showing time difference analysis for an interlock application operation using IED/LID GOOSE information in a digital substation GOOSE information monitoring and diagnosis device according to the spirit of the present invention.
Figure 9 is a flowchart showing an embodiment of a digital substation GOOSE information monitoring and diagnosis method according to the spirit of the present invention.

In describing the present invention, terms such as first and second may be used to describe various components, but the components may not be limited by the terms. Terms are intended only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, the second component may be referred to as a first component without departing from the scope of the present invention.

When a component is mentioned as being connected or connected to another component, it can be understood that it may be directly connected to or connected to the other component, but other components may exist in between. .

The terms used herein are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions may include plural expressions, unless the context clearly indicates otherwise.

In this specification, terms such as include or have are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, including one or more other features or numbers, It can be understood that the existence or addition possibility of steps, operations, components, parts, or combinations thereof is not excluded in advance.

Additionally, the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation.

Figure 2 shows the functions of the GOOSE information diagnosis device according to the spirit of the present invention.

The GOOSE information diagnosis device shown in the diagram diagnoses all GOOSE (Generic Object Oriented Substation Event) information transmitted from the Ethernet switch network in the digital substation and performs the function of constantly diagnosing information transmission processing between IED/LID. By processing, it is possible to determine whether the IED/LID equipment is operating appropriately.

Figure 3 is a block diagram showing an embodiment of a digital substation GOOSE information monitoring and diagnosis device according to the spirit of the present invention.

The illustrated digital substation GOOSE information monitoring and diagnosis device 100 includes a GOOSE information receiving unit 110 that receives GOOSE information transmitted and received between IEDs in the digital substation; An information classification unit 120 that extracts a desired GOOSE packet by checking whether the bibliographic information of the transmitted and received GOOSE packet meets analysis conditions; an information diagnosis unit 130 that checks whether the contents of the GOOSE packet extracted by the information classification unit 120 meet diagnostic conditions and secures it as necessary information; and a diagnosis result display unit 150 that derives a diagnosis result from predetermined necessary information, checks whether the diagnosis result meets an alarm condition, and notifies the user.

The illustrated digital substation GOOSE information monitoring and diagnosis device 100 is, from a simple perspective on conditions, a GOOSE information receiving unit 110 that receives Ethernet information, extracts desired information by analyzing the received information according to the rules of analysis conditions. It can be divided into an information classification unit 120 that diagnoses whether the extracted information meets diagnostic conditions, an information diagnosis unit 130 that diagnoses whether the extracted information meets the diagnostic conditions, and a diagnosis result display unit 150 that informs the user of the diagnosis result according to an alarm condition.

As shown in FIG. 2, the digital substation GOOSE information monitoring and diagnosis device is connected to the Ethernet switch network of the digital substation and can receive GOOSE packets broadcast by each IED of the digital substation.

The analysis conditions are conditions for classifying (selecting) those necessary for detection and diagnosis items desired by the monitoring and diagnostic device among the GOOSE packets broadcast from the Ethernet switch network. The analysis conditions may be confirmed for the bibliographic information (i.e., header information) of each GOOSE packet. For example, applying conditions to identify packets for a specific IED as a specific destination/source, using packet destination and source information, GOOSE packet type information, etc., and/or packets of a specific type (e.g. interlock request packet) Reasoning can apply conditions.

The diagnosis condition is a condition for extracting information necessary for a desired detection diagnosis item from the contents of packets selected by the analysis condition. For example, in the case of a status information transmission packet for a specific IED, this may be a condition for extracting information on status information items required for the detection and diagnosis items.

The alarm condition is a normal/abnormal judgment condition for the result (i.e., diagnosis result) of performing a diagnosis on a desired detection diagnosis item by reflecting the information obtained by the analysis condition and diagnosis condition, or a judgment on the degree of abnormality. It may be a condition.

The analysis conditions, diagnosis conditions, and alarm conditions may be recorded in respective storage areas 105, 106, and 107 in a predetermined storage space, respectively.

Figure 4 is a flowchart showing the flow of the GOOSE Ethernet packet reception task performed by the GOOSE information receiving unit.

In the example shown, the operation sequence of the GOOSE information receiver is as follows. Ethernet network connection process to acquire communication information (S202), Ethernet packet reception process to acquire communication information (S203), GOOSE information confirmation process to check whether the received packet is GOOSE information (S204), receiving buffer for the acquired GOOSE information It is operated in the order of the input process (S205).

The work according to the flow chart shown in FIG. 4 is performed by selectively receiving GOOSE information packets from among communication packets distributed in the Ethernet network as input to the reception buffer.

The bibliographic information of the GOOSE packet contains only information about the source IED, does not specify the destination, and is broadcast to the entire Ethernet switch network.

Figure 5 is a flowchart showing the flow of work for extracting packets suitable for diagnostic items performed by the information analysis unit.

In the illustrated example, the operation sequence of the information classification unit 120 is as follows.

Checking process of GOOSE information receiving buffer (302), GOOSE information extraction process (303) of extracting IED, information name, and status value from bibliographic information of received GOOSE packet, checking whether IED/LID information set in analysis conditions (e.g. It is operated through a process (304) of IED identification (ID confirmation) and an analysis information diagnostic buffer input process (305) of storing the confirmed information in the diagnostic buffer.

Figure 6 is a flowchart showing the flow of work performed by the information diagnosis unit.

In the illustrated example, the operation sequence of the information diagnosis unit 130 is as follows.

Process of checking the analysis information in the diagnosis buffer (402), process of extracting the analysis information (403), process of checking whether the conditions for the set diagnosis conditions are met (404), performing diagnosis with information for which the diagnosis conditions are met. It operates through a process of deriving a diagnosis result (S405) and a process of inputting the diagnosis result into a buffer (S405).

Figure 7 is a flowchart showing the flow of work performed by the diagnostic result display unit.

In the illustrated example, the operation sequence of the diagnosis result display unit 150 is as follows.

A process of checking the diagnosis result in the buffer (502), a process of extracting the diagnosis result from the buffer (503), a process of checking whether the set alarm condition is met (504), and informing the user of the corresponding information that meets the alarm condition. It is operated in the order of screen alarm information display process (505).

Figure 8 is a conceptual diagram showing time difference analysis for an interlock application operation using IED/LID GOOSE information in a digital substation GOOSE information monitoring and diagnosis device according to the spirit of the present invention.

With reference to FIG. 8, we will examine the digital substation GOOSE information monitoring and diagnosis device of FIG. 3 according to the spirit of the present invention in detail for use in checking/diagnosing the interaction of IEDs related to interlocks.

Here, the digital substation GOOSE information monitoring and diagnostic device, as a monitoring and diagnostic item, checks (diagnoses) whether mutual interlocks are operating smoothly in the digital substation Ethernet switch network.

First, let's look at the interlock operation for digital substation GOOSE packets.

Devices that perform interlock interaction with the Ethernet switch network of a digital substation include not only IEDs (Intelligent Electronic Devices) but also LIDs (Local Information Processing Devices). However, reflecting representative devices using the digital substation Ethernet switch network, the corresponding The devices will be collectively referred to as IEDs.

As shown in FIG. 2, the interlock GOOSE information is a packet (message) that is broadcast to other IEDs connected to the Ethernet switch network so that the specific IED 16 can dedicate the Ethernet switch network for a specific time.

As the devices (IED/LID) of the digital substation perform their own specified tasks, various states (values) applied to the entire digital substation are changed (modified). Not only must each state change on one device, but if one state (value) affects another state (value), the other affected states must not change while the influencing state is changing. . In other words, interlocks must be applied not only to each other but also to each other in the two states.

When each device (IED/LID) uses the state (value), it periodically broadcasts the use of the state (value) through a GOOSE packet. Meanwhile, when another device (IED/LID) that receives the above-mentioned broadcasted GOOSE packet confirms that the state (value) it wants to use or the state (value) it wants to refer to is being changed by another device, it performs the corresponding operation. wait.

Each device (IED/LID) can only know the interlock relationship between multiple states (values) referenced/used in the algorithm of the work it performs, and the interlock relationship between multiple states (values) by other devices. is unknown.

The digital substation GOOSE information monitoring and diagnosis device according to the idea of the present invention is a plurality of states ( Information on interlock relationships between states (values) is collected in advance, and the interlock relationships are integrated into 'information (topology) on interlock relationships between states (values)' and stored in a storage unit (not shown).

For example, as an analysis condition, IEDs that change the state (value) of the digital substation are designated in advance with an identification symbol (ID), or a packet for changing the state (value) of the digital substation or the state (value) of the digital substation is used. You can specify to confirm that this is a packet notifying use.

For example, as a diagnostic condition, it is possible to specify interlock operation confirmation of each interlock relationship between states (values), and additionally, confirmation of the number of changes to a specific state (value), confirmation of change frequency per unit time, etc. can be specified.

For example, as an alarm condition, an alarm can be specified when there is a mismatch in the interlock operation between states (values), an alarm when the number of changes to a specific state (value) exceeds a predetermined number of times, and an alarm when the change frequency per unit time exceeds a predetermined standard. .

For analysis of the interlock application operation, the information classification unit 120 of FIG. 3 distinguishes GOOSE packets transmitted and received between IEDs sharing the Ethernet switch network, and the information diagnosis unit 130 shares the Ethernet switch network. Interlock information between IEDs and the status (values) processed by each IED can be secured.

The diagnostic result display unit 150 notifies the user when a situation requiring user notification occurs for various purposes.

For example, the diagnostic result display unit 150 may notify the user if an IED that changes the specific state (value) exists despite the GOOSE packet broadcast notifying the change in the specific state (value). there is.

For example, the diagnosis result display unit 150 displays an IED that changes a state (value) that is not specified in the ' information (topology) about interlock relationships between states (values)' regardless of the interlock information. You can check and notify the user.

For example, the diagnosis result display unit 150 may check the discrepancy in interlock operations between specified states (values) and notify the user.

For example, the diagnosis result display unit 150 may notify the user when the number of changes to a specific state (value) exceeds a predetermined number of times, or when the change frequency per unit time exceeds a predetermined standard.

Through various notifications from the above-described diagnosis result display unit 150, it is possible to determine that there is an error in the information about interlock relationships in one IED. In other words, it was reported in advance that IED #4 changes D status information by referring to A and B status information, but in reality, there is an error in the program installed on IED #4 and C status information is changed by referring to A and B status information. , this can be figured out. This can be performed by comparing the saved topology with the actual changed state information.

As seen, the digital substation GOOSE information monitoring and diagnosis device according to the idea of the present invention can check whether it is operating appropriately in terms of time sequence by integrated management, analysis, and diagnosis of GOOSE information generated from each IED/LID.

In addition, the digital substation GOOSE information monitoring and diagnosis device according to the idea of the present invention, as shown in FIG. 8, comprehensively monitors the GOOSE information generated from each IED/LID and performs a monitoring and diagnostic function through comparison of temporal order. You can check whether each equipment is operating within an appropriate time.

Figure 9 is a flow chart showing an embodiment of the digital substation GOOSE information monitoring and diagnosis method according to the spirit of the present invention.

The illustrated digital substation GOOSE information monitoring and diagnosis method includes the steps of receiving GOOSE packets transmitted and received between IEDs in the digital substation (S10); Checking whether bibliographic information of transmitted and received GOOSE packets meets analysis conditions and extracting desired GOOSE packets (S20); Checking whether the contents of the extracted GOOSE packet meet the diagnostic conditions and securing information necessary for the detection diagnosis item (S30); Deriving diagnostic results of surveillance diagnostic items from the obtained necessary information (S40); And it may include a step (S50) of confirming whether the derived diagnosis result meets an alarm condition and notifying the user.

The step of receiving the GOOSE packets (S10) may be performed by the GOOSE information receiver 110 of FIG. 3, and the step of extracting the GOOSE packets (S20) may be performed by the information classification unit 120.

The step of securing information necessary for the detection and diagnosis items (S30) and the step of deriving the diagnosis result (S40) are performed by the information diagnosis unit 130 of FIG. 3, and the step of notifying the user (S50) is It can be performed by the diagnosis result display unit 150.

Those skilled in the art to which the present invention pertains should understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features, and that the embodiments described above are illustrative in all respects and not restrictive. Just do it. The scope of the present invention is indicated by the claims described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. .

100: Digital substation GOOSE monitoring and diagnosis device
110: GOOSE information receiver
120: Information division unit
130: Information diagnosis department
150: Diagnosis result display unit

Claims (12)

A GOOSE information receiving unit that receives GOOSE packets transmitted and received between IEDs in a digital substation;
An information classification unit that identifies the desired GOOSE packet by checking whether the bibliographic information of the transmitted and received GOOSE packet meets analysis conditions;
an information diagnosis unit that confirms whether the contents of the GOOSE packet extracted by the information classification unit meet diagnostic conditions and secures it as necessary information; and
A diagnostic result display unit that derives diagnostic results from necessary information, checks whether the diagnostic results meet alarm conditions, and informs the user.
Digital substation GOOSE monitoring and diagnostic device including.
According to paragraph 1,
From all devices belonging to a digital substation, information on the interlock relationships between a plurality of states (values) referenced/used in the algorithm of the work performed by each device is integrated. A storage unit that stores the ‘topology’
A digital substation GOOSE monitoring and diagnostic device that further includes.
According to paragraph 1,
The information diagnosis department,
A digital substation GOOSE monitoring and diagnostic device that diagnoses the task of changing the status (values) applied to the entire digital substation in IEDs sharing an Ethernet switch network.
According to paragraph 2,
The information diagnosis unit and the diagnosis result display unit,
A digital substation GOOSE monitoring and diagnostic device that notifies the user if there is an IED that changes the specific state (value), despite the GOOSE packet broadcast notifying the change in the specific state (value).
According to paragraph 2,
The information diagnosis unit and the diagnosis result display unit,
Digital substation GOOSE monitoring diagnosis that identifies IEDs that change states (values) that are not specified in the ‘information (topology) on interlock relationships between states (values)’ regardless of the interlock information and notifies the user. Device.
According to paragraph 2,
The information diagnosis unit and the diagnosis result display unit,
A digital substation GOOSE monitoring and diagnostic device that checks for discrepancies in interlock operations between specified states (values) and notifies the user.
According to paragraph 2,
The information diagnosis unit and the diagnosis result display unit,
A digital substation GOOSE monitoring and diagnosis device that notifies the user when the number of changes to a specific state (value) exceeds a predetermined number of times, or when the change frequency per unit time exceeds a predetermined standard.
Receiving GOOSE packets transmitted and received between IEDs in a digital substation;
Extracting desired GOOSE packets by checking whether the bibliographic information of the transmitted and received GOOSE packets meets analysis conditions;
Confirming whether the contents of the extracted GOOSE packet meet diagnostic conditions and securing information necessary for detection diagnostic items;
Deriving diagnostic results of surveillance diagnostic items from the obtained necessary information; and
Step of confirming whether the derived diagnostic result meets alarm conditions and notifying the user
Digital substation GOOSE monitoring and diagnosis method including.
According to clause 8,
In the step of deriving the above diagnostic results,
Digital substation GOOSE monitoring diagnosis method that diagnoses the task of changing the status (values) applied to the entire digital substation in IEDs sharing an Ethernet switch network.
According to clause 8,
The analysis conditions are:
A digital substation that specifies IEDs that change the status (value) of the digital substation, or confirms that it is a packet that changes the status (value) of the digital substation or a packet that notifies the use of the status (value) of the digital substation. GOOSE Surveillance Diagnosis Method.
According to clause 8,
The above diagnostic conditions are:
Digital substation GOOSE monitoring and diagnosis method for checking the interlock operation of each interlock relationship between states (values).
According to clause 8,
The alarm condition is,
Includes one or more of the following: an alarm when there is a discrepancy in the interlock operation between states (values), an alarm when the number of changes to a specific state (value) exceeds a predetermined number of times, and an alarm when the frequency of changes per unit time of a specific state (value) exceeds a predetermined standard. Digital substation GOOSE monitoring and diagnosis method.

Images