KR20220019913A - Intelligent electronic device with preventive diagnostics for digital substation and intelligent power system - Google Patents

Abstract

An intelligent electronic device with a preventive diagnostic function for a digital substation of the present invention comprises: an SA sensor input unit for receiving detection signals from sensors for substation automation; a preventive diagnosis sensor input unit for receiving detection signals from sensors for preventive diagnosis of power equipment; a 61850 communication module for converting the detection signals received from the SA sensor input unit and the preventive diagnosis sensor input unit into data according to the 61850 protocol; an Ethernet communication module for performing data communication with an external device using an Ethernet network for data according to the 61850 protocol; and a data processing unit for designating a destination for the data according to the 61850 protocol transmitted to the outside and performing processing on the data according to the 61850 protocol transmitted from the outside. The data processing unit may perform data communication with a substation control system and a preventive diagnosis server through the Ethernet communication module. Accordingly, it is possible to reduce the cost of digital transformation and increase operational efficiency.

Description

INTELLIGENT ELECTRONIC DEVICE WITH PREVENTIVE DIAGNOSTICS FOR DIGITAL SUBSTATION AND INTELLIGENT POWER SYSTEM

The present invention relates to an intelligent electronic device (IED) that is built-in or installed externally in a power device distributed in a substation, and is particularly installed in a power device constituting a digital substation and provides a preventive diagnosis function along with a substation automation (SA) function. It relates to an intelligent electronic device equipped with the same and an intelligent power system comprising the same.

Recently, communication technology for distributed environments such as IOT technology is developing day by day, and digital substation technology for digital management/control is being presented/operated in the electric power field where new technologies are not actively adopted due to safety concerns.

In the conventional analog substation, engineering work between various power facilities was performed by relying on manual work for complicated cable wiring, which took a long time for the engineering work of the substation. There was a cumbersome task to perform.

In order to solve this problem, a digital substation based on IEC 61850 was introduced in which the cable connection was implemented with an optical cable and the physical contact of the auxiliary relay necessary for various control was implemented as a logic circuit. As such, with the introduction of digital substations, it was possible to solve the reliability problems of the existing analog substations and shorten the recovery period due to cable wiring.

However, even if a digital substation is introduced/operated, in practice, due to concerns about safety, the existing substation control/management configuration cannot be discarded and is used in parallel.

Specifically, there are IEDs for digital substations for digital conversion of control/management signals to support substation automation (SA) functions, and IEDs for comprehensive preventive diagnosis system support for extended application services based on IOT technology, etc. are being built separately.

1 is a block diagram showing an installation form of a digital substation supporting an SA operation system and a comprehensive preventive diagnosis system according to the prior art.

In the spatially constrained substation site and the internal free space of each power device (40, 50), for the digital substation system, SA operation device (HMI) (4), information linkage device (3), IED (20), Ethernet switch 11, etc. are located, in addition to this, a diagnostic unit (5) for a comprehensive preventive diagnostic system, a Local Unit (LU) (16, 17), a preventive diagnostic sensor (61, 62, 71 ~ 74), An Ethernet switch 12 and the like are located.

The independent installation configuration of the above-described comprehensive preventive diagnosis system not only causes overlapping factors in digital conversion cost expenditure from separate installation of similar functional devices, but also reduces facility operation efficiency.

For example, a digital substation IED (20) and a comprehensive preventive diagnosis system Local Unit (LU) (16, 17) may be mentioned as similar functional devices.

From an operation point of view, a preventive diagnosis blind spot occurs (23kV GIS side is not applied) due to the selective installation of the preventive diagnosis system according to the excessive investment cost, and the dualization of facility operation and preventive diagnosis information monitoring may interfere with the prevention of power outage failure and rapid recovery.

Korea Patent Publication No. 2013-0019228

An object of the present invention is to provide an intelligent electronic device and an intelligent power system having a preventive diagnosis function for a digital substation with reduced digital conversion cost and excellent operational efficiency.

An intelligent electronic device having a preventive diagnostic function for a digital substation according to an aspect of the present invention includes: an SA sensor input unit for receiving detection signals from sensors for substation automation; a preventive diagnosis sensor input unit receiving detection signals from sensors for preventive diagnosis of power equipment; a 61850 communication module that converts the detection signals received from the SA sensor input unit and the preventive diagnosis sensor input unit into data according to the 61850 protocol; an Ethernet communication module for performing data communication with an external device using an Ethernet network and data according to the 61850 protocol; and a data processing unit that specifies a destination for the data according to the 61850 protocol transmitted to the outside, and performs processing on the data according to the 61850 protocol transmitted from the outside, wherein the data processing unit is the Ethernet communication module Through this, data communication can be performed with an external substation automation server and preventive diagnosis server.

Here, the data processing unit may check the RCB channel allocated to the substation automation server and the RCB channel allocated to the preventive diagnosis server, and transmit the data according to the 61850 protocol through the corresponding RCB channel.

Here, the data processing unit may transmit data to be transmitted to the substation automation server through a VPN channel by the Ethernet communication module.

Here, the SA sensor input unit, the preventive diagnosis sensor input unit, the 61850 communication module, the Ethernet communication module, and the data processing unit may be manufactured in a rack-type HW module detachable for a predetermined slot.

Here, the data processing unit may transmit/receive data to the substation automation server in a predetermined period, and transmit/receive data to the preventive diagnosis server if necessary for the remaining time after the data priority transmission/reception in the predetermined period.

Here, a facility control unit for controlling the operation of the power device itself in which the intelligent electronic device is installed; And it may further include a facility operation monitoring unit for monitoring the operation performance of the facility according to the instruction of the facility control unit.

An intelligent power system according to another aspect of the present invention includes an SA sensor input unit receiving detection signals from sensors for substation automation, and a preventive diagnosis sensor input unit receiving detection signals from sensors for preventive diagnosis of power equipment; A 61850 communication module that converts the detection signals received from the SA sensor input unit and the preventive diagnosis sensor input unit into data according to the 61850 protocol, and an Ethernet for performing data communication with an external device and data according to the 61850 protocol using an Ethernet network an intelligent electronic device comprising: a communication module; and a data processing unit for designating a destination for the data according to the 61850 protocol transmitted to the outside, and for processing the data according to the 61850 protocol transmitted from the outside;

a substation automation server (SCADA) server that receives information for substation control from the intelligent electronic device and transmits substation control instructions to the intelligent electronic device; and a preventive diagnosis server that receives information necessary for performing operation monitoring of power equipment from the intelligent electronic device.

Here, the intelligent electronic device and the substation automation server may perform data communication through a specific RCB channel.

Here, the intelligent electronic device and the substation automation server may perform data communication through a mutually formed VPN.

Here, the intelligent electronic device and the preventive diagnosis server may perform data communication through a specific RCB channel.

Here, the specific RCB channel may allow only one-way data communication from the intelligent electronic device to the preventive diagnosis server.

Here, the SA sensor input unit, the preventive diagnosis sensor input unit, the 61850 communication module, the Ethernet communication module, and the data processing unit may be manufactured in a rack-type HW module detachable for a predetermined slot.

Here, the intelligent electronic device may include: an SA expansion slot in which a rack-type HW module for the substation automation server is mounted; and an additional expansion slot in which a rack-type HW module for the preventive diagnosis server is mounted, wherein a structure in which a bus for reception is not connected may be applied to the additional expansion slot.

Here, the data processing unit may transmit/receive data to the substation automation server in a predetermined period, and transmit/receive data to the preventive diagnosis server if necessary for the remaining time after the data priority transmission/reception in the predetermined period.

Implementing an intelligent electronic device and/or an intelligent power system having a preventive diagnosis function for a digital substation according to the spirit of the present invention having the above configuration has the advantage of reducing digital conversion costs and increasing operational efficiency.

The intelligent electronic device and/or the intelligent power system having a preventive diagnosis function for a digital substation of the present invention has an advantage in that it is easy to prevent a failure in advance and to recover quickly by unifying diagnostic information monitoring.

The intelligent electronic device and/or intelligent power system having a preventive diagnosis function for a digital substation of the present invention has the advantage of effectively preventing blackouts/failures through the application of a comprehensive preventive diagnosis system to all facilities of the substation. .

1 is a block diagram showing an installation form of a digital substation supporting an SA operating system and a comprehensive preventive diagnosis system according to the prior art.
2 is a block diagram illustrating an installation form of a digital substation that unifies and supports the SA operation system and the comprehensive preventive diagnosis system according to the spirit of the present invention.
3 is a block diagram showing an embodiment of an intelligent electronic device for a digital substation having a preventive diagnosis function according to the spirit of the present invention.
4 is a block diagram showing the configuration of a rack-type HW module applied to the intelligent electronic devices of the prior art each having a device supporting the SA operating system and the comprehensive preventive diagnosis system.
5A is a configuration diagram showing the configuration of a rack-type HW module applied to an intelligent electronic device that can be embedded in a GIS as a convergence intelligent electronic device supporting the SA operating system and the comprehensive preventive diagnosis system according to the spirit of the present invention.
5B is a configuration diagram showing the configuration of a rack-type HW module applied to an intelligent electronic device that can be embedded in a transformer as a fusion type intelligent electronic device supporting the SA operating system and the comprehensive preventive diagnosis system according to the spirit of the present invention.
6 is a conceptual diagram illustrating an embodiment of an intelligent power system implemented in the form of a fusion of an SA operation system and a comprehensive preventive diagnosis system according to the spirit of the present invention.

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

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

The terminology used herein is used only to describe specific embodiments, and is not intended to limit the present invention. The singular expression may include the plural expression unless the context clearly dictates otherwise.

In this specification, the terms include or include are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and includes one or more other features or numbers, It may be understood that the existence or addition of steps, operations, components, parts, or combinations thereof is not precluded in advance.

In addition, shapes and sizes of elements in the drawings may be exaggerated for clearer description.

The present invention proposes a method of implementing a convergence type IED in a form based on an Intelligent Electronic Device (IED) for a digital substation to perform protection/control and preventive diagnosis information acquisition functions together.

For example, as a substation comprehensive preventive diagnosis element technology currently in use, we present a fusion type intelligent electronic device (IED) that combines 4 types of transformer diagnosis and 2 types of breaker diagnosis. As a more specific method, convergence hardware can be implemented in the form of adding an LU module that can acquire preventive diagnosis information by wire or wirelessly to an existing digital substation IED to an extension rack. At this time, a wired or wireless connection may be made between the diagnostic sensor for comprehensive preventive diagnosis and the fusion type IED to transmit sensing signals. Such a fusion type IED can be applied as a digital substation control IED, a transformer control IED, and a GIS control IED.

2 is a block diagram illustrating an installation form of a digital substation that unifies and supports a Substation Automation (SA) operating system and a comprehensive preventive diagnosis system according to the spirit of the present invention. The illustrated intelligent power system is supported by a single IED in which the components for the digital substation system and the components for the comprehensive preventive diagnosis system are fused.

The illustrated intelligent power system includes an intelligent electronic device (IED) 200 , 202 according to the spirit of the present invention; A substation automation server (SCADA) server 1 and an SA operating device that receives information for substation control from the intelligent electronic devices 200 and 202 and transmits substation control instructions to the intelligent electronic devices 200 and 202 ( HMI)(4) ; and a diagnosis unit (5) for receiving information necessary for performing operation monitoring of power equipment from the intelligent electronic devices (200, 202); and a preventive diagnosis server 2 that receives information necessary for performing operation monitoring of the selected power equipment from the diagnosis unit.

The control structure of the substation automation server (SCADA) server 1 and the information linkage device 3 and the substation control structure by the SA operation device (HMI) 4 may be collectively referred to as a substation control system.

The illustrated intelligent electronic devices (IEDs) 200 and 202 are power equipment in the substation, for example, embedded in the GIS 400 or the transformer 500, or may be implemented as external additional devices, and sensors for substation automation. The SA sensor input unit that receives detection signals from the sensor input unit, the preventive diagnosis sensor input unit that receives detection signals from the sensors for preventive diagnosis of power equipment, and the detection signals received from the SA sensor input unit and the preventive diagnosis sensor input unit according to the 61850 protocol 61850 communication module for converting data according to the protocol, an Ethernet communication module for performing data communication for data according to the 61850 protocol with an external device using an Ethernet network, and a destination for the data according to the 61850 protocol transmitted to the outside and may include a data processing unit that processes data according to the 61850 protocol transmitted from the outside.

3 is a block diagram illustrating an embodiment of an intelligent electronic device for a digital substation having a preventive diagnosis function according to the spirit of the present invention.

The intelligent electronic device 200 for a digital substation having the illustrated preventive diagnosis function includes: an SA sensor input unit 210 that receives detection signals from sensors for substation automation; a preventive diagnosis sensor input unit 220 that receives detection signals from sensors for preventive diagnosis of power equipment; a 61850 communication module 240 for converting the detection signals received from the SA sensor input unit and the preventive diagnosis sensor input unit into data according to the 61850 protocol; an Ethernet communication module 250 for performing data communication with an external device and data according to the 61850 protocol using an Ethernet network; and a data processing unit 260 that designates a destination for the data according to the 61850 protocol transmitted to the outside, and performs processing on the data according to the 61850 protocol transmitted from the outside.

Here, the data processing unit 260 transmits data according to the 61850 protocol with an external substation control system (ie, SA operation device (HMI) and/or information linkage device) and a preventive diagnosis server through the Ethernet communication module. The incoming communication can be performed.

The illustrated intelligent electronic device 200 includes a power supply unit 280 for supplying power to the above-described components; a facility control unit 270 for controlling the operation of the power device itself in which the intelligent electronic device 200 is installed; And it may further include a facility operation monitoring unit 230 for monitoring the operation performance of the facility according to the instruction of the facility control unit.

The SA sensor input unit 210 may receive sensing signals from sensors used in traditional power management fields such as CT/PT and facility status monitoring.

The preventive diagnosis sensor input unit 220 may acquire various detection parameters that can be used in the comprehensive preventive diagnosis system, and for this purpose, may receive sensing signals from various sensors. For example, not only sensing signals of partial discharge sensors and bushing diagnostic sensors installed in GIS, transformers, etc., but also traditional CT/PT sensing signals may be input.

The facility operation monitoring unit 230 is also similar to the preventive diagnosis sensor input unit 220 in that it is for acquiring various detection parameters that can be used in the comprehensive preventive diagnosis system, but the preventive diagnosis sensor input unit 220 is simply a single sensor. The sensing signal of .

The illustrated power device to which the intelligent electronic device 200 is mounted necessarily includes a separate dedicated control device for controlling its own operation, and the illustrated intelligent electronic device 200 is an optional installation equipment for the power device am. Accordingly, the facility control unit 270 may simply request control from a dedicated control device of the power device.

Sensing signals of various parameters received from the SA sensor input unit 210 , the preventive diagnosis sensor input unit 220 , and the facility operation monitoring unit 230 are each input unit 210 , 220 , 230 and/or the data processing unit It is converted into a digital value by the unit 260 , the digital value is packaged according to the 61850 protocol by the 61850 communication module 240 , and the packaged information is again converted to an Ethernet communication protocol by the Ethernet communication module 250 . (ie TCP/IP).

The 61850/Ethernet packaged information as described above may be transmitted with a destination divided into the SA operating unit (HMI) 4, the information linkage unit 3, and the diagnosis unit 5 of FIG. 2 as an external device.

In the drawing, the 61850 communication module 240 and the Ethernet communication module 250 are expressed as independent configurations to distinguish their functions, but in the power field, it is widely used to integrate and use TCP in the form of IEC 61850, communication module hardware It is generally applied in the form of a single hardware in which the communication module of FIG. 61850 and the Ethernet communication module are integrated.

In another improved implementation with enhanced security and independence for the substation automation system path, the data processing unit may transmit data to the SA operation unit (HMI) and/or information linkage device in all of the transmission paths or A portion may be transmitted through a VPN channel added to the Ethernet communication module. That is, a VPN channel based on TCP/IP can be formed using the Ethernet communication module.

As a method to reduce the manufacturing cost of the equipment itself, the digital conversion cost, and the operation and follow-up support cost, each component of the intelligent electronic device 200 according to the spirit of the present invention is detachable for a predetermined slot. It can be manufactured in a large HW module.

The slot is a kind of expansion slot for maintenance or performance improvement of the intelligent electronic device 200, and it is advantageous to provide a sufficient number to have a spare for one intelligent electronic device 200 or one power facility. .

The rack-type HW module is advantageously implemented with a single PCB board and electronic/electric elements attached thereto from the viewpoint of manufacturing cost, but is not limited thereto.

4 shows the configuration of a rack-type HW module applied to intelligent electronic devices of the prior art each having a device supporting the SA operating system and the comprehensive preventive diagnosis system.

As shown, in the case of intelligent electronic devices of the prior art, from the point of view of each individual intelligent electronic device, the internal components were modularized to increase scalability and to improve maintenance efficiency.

However, from the point of view of the entire power system, too many components are redundantly provided, and it can be seen that this is also the case when divided into rack-type HW modules.

5A is a convergence intelligent electronic device supporting the SA operation system and the comprehensive preventive diagnosis system according to the spirit of the present invention, and shows the configuration of a rack-type HW module applied to an intelligent electronic device that can be embedded in a GIS.

The input unit 210 of FIG. 3 is implemented as a CT/PT input module 210-1 in FIG. 5A, and the CT/PT input module 210-1 has an analog input (AI) function that additionally receives a similar analog signal. can also be done together.

The power supply unit 280 of FIG. 3 is also implemented as a rack-type HW module in the form of a power module 280-1.

The facility operation monitoring unit 230 of FIG. 3 is also implemented as a rack-type HW module in the form of a circuit breaker operation monitoring module 230-1.

The preventive diagnosis sensor input unit 220 of FIG. 3 is implemented as a rack-type HW module in the form of the partial discharge sensor input module 220-1, which is the most important in GIS inspection.

The data processing unit 260 of FIG. 3 is also implemented as a rack-type HW module in the form of a PCB module 260-1 having a CPU.

The 61850 communication module 240 and the Ethernet communication module 250 of FIG. 3 is a rack-type HW module in the form of a single communication module 240-1, 250-1 in which the 61850 communication module and the Ethernet communication module are integrated in FIG. 5a. was implemented with

5B is a fusion type intelligent electronic device that supports the SA operation system and the comprehensive preventive diagnosis system according to the spirit of the present invention, and shows the configuration of a rack-type HW module applied to an intelligent electronic device that can be embedded in a transformer.

The input unit 210 of FIG. 3 is implemented as a CT/PT input module 210-2 in FIG. 5B, and the CT/PT input module 210-2 additionally has an analog input (AI) function for receiving a similar analog signal. can also be done together.

The power supply unit 280 of FIG. 3 is also implemented as a rack-type HW module in the form of the power module 280-2.

The facility operation monitoring unit 230 of FIG. 3 is also implemented as a rack-type HW module in the form of a transformer operation monitoring module 230-2.

The preventive diagnosis sensor input unit 220 of FIG. 3 was implemented as two rack-type HW modules in the form of a partial discharge sensor input module and a bushing diagnosis sensor input module 220-2 that receive sensing signals for transformer inspection. Here, the two rack-type HW modules are separately allocated to increase the convenience for maintenance (maintenance).

The data processing unit 260 of FIG. 3 is also implemented as a rack-type HW module in the form of a PCB module 260-2 having a CPU.

The 61850 communication module 240 and the Ethernet communication module 250 of FIG. 3 is a rack-type HW module in the form of a single communication module 240-2, 250-2 in which the 61850 communication module and the Ethernet communication module are integrated in FIG. 5a. was implemented with

Next, in the convergence type intelligent electronic device according to the spirit of the present invention, a method of dividing the communication path for the SA operating system and the comprehensive preventive diagnosis system will be described.

6 shows an embodiment of an intelligent power system implemented in the form of a fusion of the SA operating system and the comprehensive preventive diagnosis system according to the spirit of the present invention.

The illustrated intelligent power system includes an SA sensor input unit receiving detection signals from sensors for substation automation, a preventive diagnosis sensor input unit receiving detection signals from sensors for preventive diagnosis of power equipment, the SA sensor input unit and A 61850 communication module that converts the detection signals received from the preventive diagnosis sensor input unit into data according to the 61850 protocol, and an Ethernet communication module that performs data communication with an external device and data according to the 61850 protocol using an Ethernet network; an intelligent electronic device 200 including a data processing unit for designating a destination for the data according to the 61850 protocol transmitted to and for processing data according to the 61850 protocol transmitted from the outside; A substation automation (SCADA) server (1) and SA operating device (HMI) (4) that receive information for substation control from the intelligent electronic device 200 and transmit substation control instructions to the intelligent electronic device 200 ; and a diagnosis unit (5) for receiving information necessary for performing operation monitoring of power equipment from the intelligent electronic device (200); and a preventive diagnosis server 2 that receives information necessary for performing operation monitoring of the selected power equipment from the diagnosis unit.

The illustrated intelligent power system is information linkage between the convergence intelligent electronic device 200 and the substation automation (SCADA) server 1 and the SA operation device (HMI) 4 or the comprehensive preventive diagnosis server 2 The device (3), the Ethernet switch (11), and the diagnostic unit (5) can mediate.

The intelligent electronic device 200 of the illustrated intelligent power system performs data communication with the SA operation device (HMI) 4 and the information linkage device 3 or the diagnostic unit 5, but does not use a separate independent communication network. However, since communication is performed through the same communication network for the SA operation device (HMI) 4, the information linkage device 3, and the diagnosis unit 5, it is necessary to distinguish which device is for each communication.

In the present invention, through the RCB channel assignment of the 61850 communication protocol, the communication channel (path) of the intelligent electronic device 200 and the SA operating device (HMI) 4 and the information linkage device 3, and the intelligent electronic device 200 and the communication channel (path) of the diagnosis unit (5) (ultimately the preventive diagnosis server (2)).

That is, the intelligent electronic device 200, the SA operating device (HMI) 4, and the information linkage device 3 perform data communication through a specific RCB channel, and the intelligent electronic device 200 and the diagnostic unit In (5), data communication can be performed through a specific RCB channel different from that of the SA operating device (HMI) 4 and the information linkage device 3 .

In another implementation that strengthens the independence (closeness) of the substation automation path, the intelligent electronic device 200 and the substation automation server 1 are formed between the intelligent electronic device 200 and the information linkage device 3 In addition to the specific RCB channel, data communication can be performed through the VPN formed in all or part of the path between the information linkage device 3 and the substation automation server 1 .

In the case of an implementation in which the independence (closeness) of the substation automation path is strengthened, only one-way data communication may be performed from the intelligent electronic device 200 to the diagnosis unit 5 .

The data processing unit of the intelligent electronic device 200 shown in FIG. 6 is the RCB channel assigned to the SA operation unit (HMI) 4 and the information linkage device 3 and the diagnostic unit 5 assigned to The RCB channel is checked, and data according to the 61850 protocol is transmitted through the corresponding RCB channel.

In order to implement the idea of the present invention, in constructing a system that implements a convergence type IED in a form based on IED for a digital substation, and performs protection/control and preventive diagnosis information acquisition functions together, technical/economic difficulties are described above. It can be solved depending on the content.

However, there are practical difficulties from a different point of view in implementing a convergence type IED in a form based on IED for a digital substation and constructing a system that performs protection/control and preventive diagnosis information acquisition functions together.

The practical difficulty is that operators/designers of power management systems, which are continuously performed from the traditional method, have closed and independent communication networks for substation automation management constituting the substation automation system due to the high risk of power management and security related reasons. that it demands

Under these circumstances, an inefficient system in which an IED for a substation automation system and an IED for a preventive diagnosis system are separately mounted as shown in FIG. 1 is constructed.

In the present invention, although it is not a physically independent closed network, the following methods are implemented that can secure a significant level of independence and closure in the communication channel for the substation automation system.

1. The rack type HW module divides the components for substation automation system and preventive diagnosis system

It is implemented with rack-type HW modules as shown in FIG. 5A or FIG. 5B, but the hardware components for the substation automation system and the hardware components for the preventive diagnosis system can be manufactured as independent rack-type HW modules, respectively. However, it is economical to implement the hardware components for the substation automation system and preventive diagnosis system with overlapping functions in a convergence type.

The convergence type IED H/W configuration method presented in the form of a rack-type HW module as shown in FIG. 5a or FIG. 5b may be configured in the form of adding a preventive diagnosis module to the existing IED type, using an existing wired cable or wirelessly Each rack type HW module can be configured to acquire information through (Wifi).

With such an independent rack-type HW module only for substation automation system, it is possible to partially secure a significant level of independence and closure in the communication channel for substation automation system.

2. RCB Channel Assignment

6, in the RCB channel assignment of the 61850 communication protocol, the RCB channel for communication between the intelligent electronic device 200 and the SA operation device (HMI) 4 and the information linkage device 3, and intelligent The RCB channel for communication between the electronic device 200 and the diagnosis unit 5 (ultimately, the preventive diagnosis server 2) is made different. Accordingly, it is possible to block the misidentified use of the communication channel for the substation automation system on the preventive diagnosis system side. Depending on the implementation, the RCB channels of the SA operating device (HMI) 4 and the information linkage device 3 may be given different numbers, but in this case, it is desirable to have a significant level of independence and closure with the same reinforcement. desirable.

3. Apply VPN

In another implementation for increasing security, in all or part of the path of the specific RCB channel used by the intelligent electronic device 200, the SA operating device (HMI) 4, and the information linkage device 3, the intelligent A VPN formed in advance between the electronic device 200 and the SA operating device (HMI) 4 and the information linkage device 3 may be additionally applied. By applying VPN, a widely used technology to ensure security and closure, it is possible to secure a significant level of independence and closure in the communication channel for the substation automation system in SW.

4. Time division

The data processing unit of the intelligent electronic device 200 in the implementation with the most enhanced degree of independence and closure of the communication channel for the substation automation system, the SA operation unit (HMI) (4) and the information linkage device (3) at a predetermined cycle Data is first transmitted/received with the module, and data can be transmitted/received to the diagnosis unit 5 if necessary during the remaining time after the data priority transmission/reception of the predetermined period. That is, by preferentially allocating communication resources to the substation automation system in a time division manner, it is possible to largely secure a significant level of independence and closure in the communication channel for the substation automation system.

In the case of the above-described enhanced implementation, the time division allocated between the transmission and reception devices corresponding to each other of the corresponding intelligent electronic device 200, the SA operation device (HMI) 4 and the information linkage device 3 is different. In this case, an independent channel environment can be guaranteed by considering that there is a problem with the authenticity of the communication channel and performing checks/actions for it.

5. Configure the path for the preventive diagnosis system as an upload-only channel

The intelligent electronic device 200 of the implementation with a significant level of independence and closure in the communication channel for the substation automation system only transmits data from the intelligent electronic device 200 to the diagnosis unit 5 in one-way data communication only. Upload-only channel restrictions can be applied. Accordingly, it is possible to fundamentally prevent a situation in which an operation of a facility or device involved in the substation automation system is instructed according to information applied from the server side of the preventive diagnosis system.

The upload-only channel restriction may be implemented in firmware or SW in at least one of the data processing unit 260, the 61850 communication module 240, and the Ethernet communication module 250 of FIG. 3 .

Since the IED equipment itself proposed in the present invention is the equipment for the substation automation system and the function for the preventive diagnosis system is added, upload-only channel limitation can be applied from hardware as well as software.

For example, with respect to the expansion slot in which the rack-type HW module is mounted, the SA expansion slot in which the rack-type HW module for the substation automation system is mounted and the additional expansion slot in which the rack-type HW module for the preventive diagnosis system is mounted are different standards. and the like, and a structure in which a bus for reception is not connected can be applied to the additional expansion slot.

On the other hand, in the case of the upload-only channel limitation of the preventive diagnosis path described above, there is a problem that online maintenance (eg, firmware update, setting change) in the preventive diagnosis system is impossible. However, maintenance (eg, firmware update, setting change) in the preventive diagnosis system is performed in an offline method such as replacing the rack-type HW module for the preventive diagnosis system, or components for the preventive diagnosis system in the substation automation system It can be implemented to grant the authority to perform firmware update, etc., and to perform online maintenance (eg firmware update, setting change) of the preventive diagnosis system on the substation automation system side.

Those skilled in the art to which the present invention pertains should understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential characteristics thereof, so the embodiments described above are illustrative in all respects and not restrictive. only do The scope of the present invention is indicated by the following claims rather than the detailed description, and all changes or modifications 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. .

3: information linkage device
4: SA operating device (HMI)
5: Diagnostic Unit
200: intelligent electronic device (IED)
210: SA sensor input unit
220: preventive diagnosis sensor input unit
230: equipment operation monitoring unit
240: 61850 communication module
250: Ethernet communication module
260: data processing unit
270: facility control unit
280: power supply

Claims (12)

an SA sensor input unit receiving detection signals from sensors for substation automation;
a preventive diagnosis sensor input unit receiving detection signals from sensors for preventive diagnosis of power equipment;
a 61850 communication module that converts the detection signals received from the SA sensor input unit and the preventive diagnosis sensor input unit into data according to the 61850 protocol;
an Ethernet communication module for performing data communication with an external device using an Ethernet network and data according to the 61850 protocol; and
A data processing unit that designates a destination for data according to the 61850 protocol transmitted to the outside, and performs processing on the data according to the 61850 protocol transmitted from the outside,
The data processing unit is an intelligent electronic device having a preventive diagnosis function for a digital substation that performs data communication with a substation control system and a preventive diagnosis server through the Ethernet communication module.
According to claim 1,
The data processing unit,
An intelligent electronic device that checks the RCB channel assigned to the substation control system and the RCB channel assigned to the preventive diagnosis server, and transmits data according to the 61850 protocol through the RCB channel.
According to claim 1,
The SA sensor input unit, the preventive diagnosis sensor input unit, the 61850 communication module, the Ethernet communication module, and the data processing unit,
An intelligent electronic device manufactured in a rack-type HW module that can be detached for a predetermined slot.
According to claim 1,
The data processing unit is
Data is first transmitted and received to the substation control system at a predetermined period,
An intelligent electronic device that transmits/receives data to the preventive diagnosis server if necessary during the remaining time after the first data transmission/reception of the predetermined period.
According to claim 1,
a facility control unit controlling the operation of the power device itself in which the intelligent electronic device is installed; and
Facility operation monitoring unit for monitoring the operation performance of the facility according to the instruction of the facility control unit
An intelligent electronic device further comprising a.
An SA sensor input unit receiving detection signals from sensors for substation automation;
a preventive diagnosis sensor input unit receiving detection signals from sensors for preventive diagnosis of power equipment;
a 61850 communication module that converts the detection signals received from the SA sensor input unit and the preventive diagnosis sensor input unit into data according to the 61850 protocol;
An Ethernet communication module for performing data communication with an external device using an Ethernet network and data according to the 61850 protocol;
an intelligent electronic device including a data processing unit for designating a destination for the externally transmitted data according to the 61850 protocol and for processing the externally transmitted data according to the 61850 protocol;
a substation control system that receives information for substation control from the intelligent electronic device and transmits a substation control instruction to the intelligent electronic device; and
A preventive diagnosis server that receives information necessary to perform operation monitoring of power facilities from the intelligent electronic device
An intelligent power system that includes
7. The method of claim 6,
The intelligent electronic device and the substation control system are intelligent power systems that perform data communication through a specific RCB channel.
7. The method of claim 6,
An intelligent power system in which the intelligent electronic device and the preventive diagnosis server perform data communication through a specific RCB channel.
9. The method of claim 8,
The specific RCB channel is an intelligent power system allowing only one-way data communication from the intelligent electronic device to the diagnostic unit.
7. The method of claim 6,
The SA sensor input unit, the preventive diagnosis sensor input unit, the 61850 communication module, the Ethernet communication module, and the data processing unit,
An intelligent power system manufactured in a rack-type HW module that can be detached for a predetermined slot.
11. The method of claim 10,
The intelligent electronic device may include: an SA expansion slot in which a rack-type HW module for an SA operation device (HMI) as the substation control system is mounted; and
Additional expansion slot in which rack type HW module for the preventive diagnosis server is mounted
further comprising,
An intelligent power system having a structure in which a bus for reception is not connected to the additional expansion slot.
7. The method of claim 6,
The data processing unit first transmits/receives data to the substation control system at a predetermined period,
An intelligent power system for transmitting/receiving data to the preventive diagnosis server if necessary during the remaining time after data priority transmission/reception of the predetermined period.

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