KR20200131151A - Digital substation hybrid operating system with enhanced communication reliability - Google Patents

Abstract

The present invention relates to a digital substation mixed operating system. The digital substation mixed operating system comprises a field facility, a field information processing panel, an access switch, a backbone switch, and a substation control device. The field information processing panel includes a plurality of field information relay devices, constructs a communication channel with the substation control device by using the plurality of field information relay devices, reconstructs another communication channel when an error occurs in the constructed communication channel, and transmits and receives data for monitoring, control, and measurement of the field facility by using the newly constructed communication channel. Even if a problem occurs in some devices in the digital substation mixed operating system, the field information processing panel stably transmits the data for monitoring and measurement of the field facility to the substation control device, and receives control data of the field facility from the substation control device. Accordingly, communication stability and reliability of the digital substation mixed operating system are greatly improved.

Description

Digital substation hybrid operating system with enhanced communication reliability}

It relates to a digital substation mixed operating system, and more particularly, to a digital substation mixed operating system with improved communication reliability.

In general, it is necessary to boost or step down the voltage in several stages in the process of supplying the power produced by a power plant to consumers such as households, offices, factories, etc., and also distribute the power generated by the power plant to many areas for transmission. Needs to be. A substation is a facility that changes the characteristics of voltage or current in the process of sending power produced by a power plant to a consumer through a transmission line or a distribution line. In addition to the above-described roles, the substation also manages voltage transformation, power distribution, transmission and distribution lines, and facilities installed in the substation.

Various types of power equipment (field equipment) such as transformers, circuit breakers, disconnectors, relays, and lightning arresters are installed in such substations. In order to monitor and control various field facilities installed in the substation, a digital substation operation system consisting of an on-site information processing unit, substation operation device, and monitoring and diagnosis device is additionally installed at the substation. The on-site information processing unit receives the measurement data or operation status data of the on-site facility from the on-site facility or from a remote terminal unit (RTU) and transmits it to an upper substation operating device or monitoring and diagnostic device installed in a remote location. The field information processing team collects measurement data or operation status data of various field facilities and transmits it to the substation operating device or monitoring and diagnosis device, so that a user in a remote location can check the information on the field facility.

In the conventional digital substation operating system, one communication channel is used when transmitting the data collected by the field information processing unit to the substation control device such as the substation operation device or the monitoring and diagnosis device, so the field information processing unit, the substation control device, and the field information If any one of the access switch and the backbone switch for transmitting and receiving data between the processing panel and the substation control device is unable to communicate, the data collected by the on-site information processing panel cannot be transmitted to the substation control device. In this case, the substation control device cannot monitor or control a number of equipment connected to the field information processing panel. Accordingly, there is a problem that the stability, reliability and availability of the digital substation operating system are deteriorated.

Republic of Korea Patent Publication No. 10-1861576 "IEC61850-based on-site information processing unit" relates to an IEC61850-based on-site information processing panel that can be directly linked with an IEC61580-based digital substation operating system. It includes an operation processing unit, a second communication unit, and a display unit. The input/output module transmits monitoring information input from the field facility through the DNP protocol, and the first communication unit communicates with the input/output module using the DNP protocol. The operation processing unit converts the monitoring information received through the DNP protocol from the input/output module through the first communication unit into a signal of the IEC61850 protocol, and the second communication unit transmits the monitoring information converted into the signal of the IEC61850 protocol to the digital substation operating system. This conventional field information processing unit includes two communication units, but the first communication unit is connected to the field facility, the second communication unit is connected to the digital substation operating system, and the conventional on-site information processing unit is connected to the digital substation operating system, respectively. Therefore, since only one communication channel with the digital substation operation system is used, there is a problem in that monitoring information of the field facility cannot be transmitted to the digital substation operation system when an abnormality occurs in the second communication unit.

In the case of an error in the communication channel that transmits and receives data between the on-site information processing panel and the substation control device in the digital substation mixed operating system, re-establish another communication channel and transmit monitoring, control, and measurement data through the newly established communication channel. It is to provide a digital substation mixed operating system with improved communication reliability. Further, it is not limited to the technical problems as described above, and another technical problem may be derived from the following description.

A digital substation mixed operating system according to an embodiment of the present invention includes at least one field facility installed in the substation; The at least one field facility is connected to the at least one field facility to receive monitoring and measurement data representing the state of the at least one field facility from the at least one field facility, and control data for controlling the operation of the at least one field facility. On-site information processing team that transmits to the on-site facilities of the company; A plurality of lower access switches respectively connected to the on-site information processing unit to receive monitoring and measurement data of the at least one on-site facility from the on-site information processing unit and to transmit control data to the on-site information processing unit; A plurality of backbone switches connected in parallel to each of the plurality of lower access switches; A plurality of upper access switches connected in parallel to each of the plurality of backbone switches; And a substation control device connected in parallel to the plurality of upper access switches to control the at least one field facility based on data transmitted from any one of the plurality of upper access switches, wherein the field information processing unit includes the at least An input/output device connected to one field facility to receive and output monitoring and measurement data from the at least one field facility; And transmitting the monitoring and measurement data of the at least one field facility, which is connected to each of the plurality of lower access switches and output by the input/output device, to one of the plurality of lower access switches, and any one of the plurality of lower access switches. And a plurality of field information relay devices for receiving control data of the at least one field facility, and the field information processing unit includes the plurality of lower access switches, the plurality of backbone switches, the plurality of upper access switches, and the plurality of Any one of the plurality of lower access switches, any one of the plurality of backbone switches, any one of the plurality of upper access switches, and one of the plurality of site information relay devices based on the communication status of each of the site information relay devices The monitoring and measurement data of the at least one field facility is transmitted to the substation control device using a communication channel established by selecting any one, and the field information processing unit includes the plurality of lower access switches, the plurality of backbone switches, and the One of the plurality of lower access switches, any one of the plurality of backbone switches, and one of the plurality of upper access switches according to a change in communication state of at least one of a plurality of upper access switches and the plurality of on-site information relay devices Transmits monitoring and measurement data of the at least one field facility to the substation control device using a communication channel established by reselecting any one and one of the plurality of field information relay devices, and the input/output device comprises the at least Monitoring and measurement data of one field facility is input to all of the plurality of field information relay devices.

The on-site information processing unit further includes a storage storing a communication channel list in which a plurality of communication channels for transmitting and receiving monitoring, measurement, and control data of the at least one on-site facility between the on-site information processing panel and the substation control device are recorded, and , The communication channel list includes an address of any one of the plurality of on-site information relay devices constituting each communication channel, an address of any one of the plurality of lower access switches, an address of any one of the plurality of backbone switches, and A priority determined based on an address of any one of the plurality of upper access switches, whether communication is possible for each communication channel, a data transmission rate, and a quality of service (QoS), and the field information processing unit includes the communication channel Based on the list, any one of the plurality of lower access switches, one of the plurality of backbone switches, any one of the plurality of upper access switches, and any one of the plurality of on-site information relay devices are selected based on the list.

A first field information relay device among the plurality of field information relay devices is in an operating state of transmitting and receiving data with any one of the plurality of lower access switches, and a second field information relay device among the plurality of field information relay devices It is in a standby state in which data is not transmitted and received with the lower access switches, and the established communication channel includes the first field information relay device in the operating state.

The first on-site information relay device and the second on-site information relay device include whether an error occurs in an access switch connected to each of the on-site information relay devices, whether a representative IP address indicating the address of the on-site information processing unit is allocated, and an error in the NIC port. Each of the first field information relay device and the second field information relay device exchanges a heartbeat signal indicating whether or not it occurs, and each of the first field information relay device switches to an operating state or a standby state according to a heartbeat signal from another 1 When the heartbeat signal of the field information relay device indicates that an error in the NIC port has occurred or that a representative IP address has not been assigned, the first field information relay device is switched to the standby state and the second field information relay device is operated. State, and the on-site information processing unit uses a communication channel constructed with any one of the second on-site information relay device, the plurality of backbone switches, and the plurality of upper access switches, and the at least one field facility Transmits the monitoring and measurement data of the substation to the substation control device.

A representative IP address is assigned to a field information relay device in an operational state among the first field information relay device and the second field information relay device, and a standby state among the first field information relay device and the second field information relay device. When the representative IP address is retrieved from the on-site information relay device, the same representative IP address is assigned to the first on-site information relay device or the second on-site information relay device in an operating state.

In the case of an error in the communication channel that transmits and receives data to and from the substation control device using a plurality of on-site information relay devices and one on-site information processing unit in a digital substation mixed operating system, By selecting another communication-capable field information relay device, lower access switch, backbone switch, or upper access switch and re-establishing another communication path, even if an error occurs in some devices of the digital substation mixed operating system, between the field information processing unit and the substation control device It can stably transmit and receive the monitoring, control and measurement data of field facilities. In a digital substation mixed operating system, even if an error occurs in some communication functions of the site information processing panel or some access switch errors occur, monitoring and measurement data of site facilities can be transmitted to the substation control device through other communication channels, and substation control Control data of field equipment can be received from the device. Accordingly, communication stability and reliability of the digital substation mixed operating system are greatly improved.

In addition, by assigning the same representative IP address to the on-site information relay device in operation among the plurality of on-site information relay devices in the on-site information processing panel, the lower access switch, backbone switch, upper access switch, and substation control device are Makes it recognized as if one field information relay device is operating in the field information processing team. Since the IP address does not change even when switching from one field information relay device to another field information relay device from a plurality of field information relay devices, the substation control device does not need to request a new IP address from the field information processing team. There is no gap in data transmission/reception that can occur when the information processing team is assigned a new IP address and establishes a communication channel again. Accordingly, even if the on-site information processing unit switches from the on-site information relay device that is currently transmitting and receiving data to and from the server to another on-site information relay device to transmit and receive data to and from the substation control device, the substation control device and the field facility Monitoring, control and measurement data can be continuously and rapidly transmitted and received.

In addition, the input/output device connected to the field facility in the field information processing unit inputs monitoring and measurement data of the field facility to all of the plurality of field information relay devices, so that only the field information relay device in the standby state among the plurality of field information relay devices is used. It can prevent the problem of inputting monitoring and measurement data. Accordingly, the stability and reliability of the operation of the on-site information processing team of the digital substation mixed operating system are greatly improved.

1 is a diagram showing a general digital substation mixed operating system.
2 is a diagram illustrating a communication channel between an on-site information processing panel and a substation control device according to an embodiment of the present invention.
3 is a view showing an embodiment of the configuration diagram of the field information processing unit shown in FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. Embodiments of the present invention to be described below relate to a digital substation mixed operating system that communicates with field facilities in an analog or digital manner, and the digital substation mixed operating system includes a field information processing panel, an access switch, a backbone switch, and a substation control device. It is configured, and in the digital substation mixed operating system, the field information processing team relates to transmitting the monitoring and measurement data of the field facility input from the field facility in analog or digital method to the substation control device. To those of ordinary skill in the art to which the embodiments of the present invention belong, the “field facility” to be described below is a facility that is installed at a distance from the substation control device, and includes various types of transformers, circuit breakers, disconnectors, relays, arresters, etc. It may be understood that a device including a kind of power facility is meant, and a “communication channel” to be described below refers to a path through which data moves between the device and the device by wire or wirelessly. In addition, hereinafter, numbers (eg, first, second, etc.) used in the description of the present invention are used as identification symbols to distinguish one component from another component.

1 is a diagram showing a general digital substation mixed operating system. The digital substation mixed operating system is a system that enables convenient operation of power facilities by monitoring and controlling a number of field facilities installed in power facilities such as substations and plants in real time. Referring to FIG. 1, the digital substation mixed operating system includes a substation control device 10, such as a substation automation (SA, Substation Automation) operation device, a substation automation information linkage device, a substation automation information monitoring and diagnosis device, etc., and access switches 20 and 40. ), a backbone network (30), a field information processing unit (50), and a field facility (60). Communication performed in the digital substation mixed operating system according to an embodiment of the present invention is performed according to the IEC (International Electrotechnical Commission) 61850 standard.

In a digital substation mixed operating system, the substation control device 10 receives monitoring and measurement data representing the status of each field facility 60 from a plurality of field facilities 60 installed in remote locations, and receives each field facility 60 It is possible to check the status of the field facility 60 based on the monitoring and measurement data of. In addition, the substation control device 10 may transmit control data for controlling each field facility 60 through a communication channel established with the field information processing panel 50 to control the field facility 60 installed at a remote location. . Examples of the substation control device 10 include a substation automation operating device 11 and a substation automation information linking device 12.

The backbone network 30 is a top-level communication network that connects several sub-networks to each other or integrates distributed communication devices, and is composed of a plurality of backbone switches 31 and 32. The backbone network 30 is connected to a substation control device 10 such as a substation automation operating device, a substation automation linkage device, a substation automation information monitoring and diagnosis device, and a field information processing unit 50, respectively, and the substation control device 10 and The site information processing unit 50 may transmit and receive data through the backbone network 30. The backbone switches 31 and 32 are connected to the access switches 20 and 40 to transmit and receive data with the access switches 20 and 40.

The access switches 20 and 40 include an upper access switch 20 positioned between the substation control device 10 and the backbone network 30, and a lower access switch positioned between the on-site information processing unit 50 and the backbone network 30. It is divided into a switch 40. The upper access switch 20 located between the substation control device 10 and the backbone switches 31 and 32 of the backbone network 30 receives the control data of the field facility 60 from the substation control device 10 and It transmits to the switches 31 and 32, receives the monitoring and measurement data of the field facility 60 from the backbone switches 31 and 32, and transmits it to the substation control device 10. The lower access switch 40 located between the on-site information processing panel 50 and the backbone switches 31 and 32 of the backbone network 30 receives monitoring and measurement data of the on-site facility 60 from the on-site information processing panel 50 Then, it is transmitted to the backbone switches 31 and 32, and the control data of the field equipment 60 is received from the backbone switches 31 and 32 and transmitted to the field information processing panel 50.

The on-site information processing unit 50 serves to monitor and control the on-site equipment 60. The on-site information processing unit 50 may be connected to a number of on-site facilities 60, while monitoring each connected on-site facility 60, receiving monitoring and measurement data indicating the status of each on-site facility 60, and receiving the received site The monitoring and measurement data of the facility 60 is transmitted to the substation control device 10. In addition, the on-site information processing panel 50 receives a signal for controlling each field facility 60 from the substation control device 10, and controls each field facility 60 according to the received signal. The field facility 60 is a power facility including a transformer, a circuit breaker, a disconnector, a relay, and a lightning arrester installed in a substation.

In a general digital substation mixed operating system, the field information processing panel 50 is connected to one access switch 40, the access switch 40 is connected to one backbone switch 31, 32, and the substation control device 10 It is connected to the access switch 20 of FIG. One communication channel consisting of two access switches 20 and 40 and backbone switches 31 and 32 is established between the field information processing panel 50 and the arbitrary substation control device 10. The field information processing unit 50 transmits the monitoring and measurement data received from the plurality of field facilities 60 to the substation control device 10 through the established communication channel. Here, since one field information processing panel 50 and one substation control device 10 transmit and receive data through one communication channel, the field information processing panel 50 constituting one communication channel, the access switch 20, 40), or when an abnormality occurs in any one of the backbone switches 31 and 32, there is a problem that the substation control device 10 cannot monitor, control, and measure a plurality of field facilities 60.

In order to solve this problem, in a digital substation mixed operating system according to an embodiment of the present invention, a plurality of sub-access switches 40, a plurality of substations between one on-site information processing panel 50 and one substation control device 10, A plurality of backbone switches 31 and 32, and a plurality of upper access switches 20 are positioned, any one of a plurality of lower access switches 40, any one of a plurality of backbone switches 31 and 32, and a plurality of Even if an error occurs in some devices using a communication channel established by one of the upper access switches 20 and the communication channel currently transmitting data becomes disabled, a new communication channel is established using another device that does not have an error. And, by transmitting and receiving data through a newly established communication channel, the on-site information processing panel 50 and the substation control device 10 can stably transmit and receive data. A method of establishing a communication channel between the on-site information processing panel 50 and the substation control device 10 will be described in detail below.

2 is a diagram illustrating in detail a communication channel between an on-site information processing panel and a substation control device according to an embodiment of the present invention. The embodiment shown in FIG. 2 specifically illustrates a communication channel for transmitting and receiving data between one field information processing panel 50 and a substation control device. Referring to Figure 2, one field information processing unit 50 is a plurality of sub-access switches 40, a plurality of backbone switches 31 between each of the substation automation operating device 11 and the substation automation information linkage device 12. , 32), and a plurality of upper access switches 20 are positioned. The on-site information processing unit 50 selects any one of the plurality of lower access switches 40, any one of the plurality of backbone switches 31 and 32, and any one of the plurality of upper access switches 20 to establish a communication channel. Build.

Referring to the embodiment shown in Fig. 2, the field information processing unit 50 is connected in parallel with each of the two lower access switches 40. The on-site information processing unit 50 includes two on-site information relay devices that perform a communication function, and each on-site information relay device is a first access switch 41 and a second access switch 42, which are lower access switches 40. It is connected in parallel with each, so that a plurality of communication channels can be established. The field information processing unit 50 transmits the monitoring and measurement data received from the field facility 60 through the established communication channel to at least one of the two lower access switches 40, and any of the two lower access switches 40 It receives control data from one.

Each of the first access switch 41 and the second access switch 42 is connected in parallel with each of the first backbone switch 31 and the second backbone switch 32. Referring to FIG. 2, the first access switch 41 is connected to each of the first backbone switch 31 and the second backbone switch 32. The first access switch 41 transmits data to one of the first backbone switch 31 and the second backbone switch 32, and from any one of the first backbone switch 31 and the second backbone switch 32 Receive data. Like the first access switch 41, the second access switch 42 is connected in parallel with each of the first backbone switch 31 and the second backbone switch 32, and transmits and receives data.

Each of the first backbone switch 31 and the second backbone switch 32 is connected in parallel to each of the third access switch 21 and the fourth access switch 22 as the upper access switch 20. The first backbone switch 31 transmits the monitoring and measurement data of the field equipment 60 transmitted from the lower access switch 40 to one of the third access switch 21 and the fourth access switch 22, and Control data of the field facility 60 is received from any one of the 3 access switch 21 and the fourth access switch 22. Like the first backbone switch 31, the second backbone switch 32 is connected in parallel with each of the third access switch 21 and the fourth access switch 22 and transmits and receives data.

The backbone switches 31 and 32 are switches constituting the backbone network 30. The backbone switches 31 and 32 establish a communication channel with each of the plurality of access switches, receive data from the plurality of access switches, and transmit the data to other access switches to transmit the data to the destination of the data. In addition, the backbone switches 31 and 32 can transmit and receive data with other backbone switches. When the substation control device 10, which is the destination of monitoring and measurement data transmitted from the access switch connected to the backbone switches 31 and 32, belongs to a sub-network connected to another backbone switch, the backbone switches 31 and 32 It transmits monitoring and measurement data of the access switch. Another backbone switch transmits the monitoring and measurement data of the access switch to the connected substation control device.

As described above, the backbone network 30 is an upper communication network to which several lower networks are connected, and is located at the center of the entire network so that all data passes through the backbone network 30. Since the backbone switches 31 and 32 need to process a lot of data, it is preferable to use equipment with a large capacity. Since the backbone network 30 plays an important role in a communication network as a network through which all data passes, the backbone network 30 is redundant in order to secure stability and reliability of the communication network. The backbone network 30 is redundant using Hot Standby Router Protocol (HSRP) or Virtual Router Redundancy Protocol (VRRP). A detailed description of the redundancy of the backbone network 30 will be omitted to avoid obscuring the point of the present invention.

Each of the third access switch 21 and the fourth access switch 22 is connected in parallel to each of the substation automation operating device 11 and the substation automation information linking device 12 which are substation control devices 10. The third access switch 21 converts the monitoring and measurement data of the field facility 60 transmitted from one of the first backbone switch 31 and the second backbone switch 32 to the substation automation operating device 11 or substation automation. It transmits to the information linkage device 12, and receives the control data of the field facility 60 from the substation automation operating device 11 or the substation automation information linkage device 12. Like the third access switch 21, the fourth access switch 22 is connected in parallel with each of the substation automation operating device 11 and the substation automation information linking device 12, and transmits and receives data.

The substation automation operating device 11 and the substation automation information linking device 12 are devices included in the substation control device 10 in the digital substation mixed operating system, and monitor the field facility 60 from the field information processing unit 50 And receiving the measurement data, and transmits the control data of the field facility 60 to the field information processing unit 50. The substation automation operating device 11 analyzes the monitoring and measurement data of the field facility 60, and provides the current state of the field facility 60 to the operator. For example, the substation automation operating device 11 provides various information, such as a single conduction display, a list of monitoring and control events, and the like, to the operator through the display of the substation automation operating device 11, allowing the operator to It makes it possible to easily check the state of the field facility 60 and control the field facility 60.

Substation automation information linkage device (12) is a SCADA (Supervisory Control And Data Acquisition) system, distribution automation system (DAS, Distribution) to monitor and control the digital substation mixed operation system from the external system of the digital substation mixed operation system. Automation System) and other external systems. The substation automation information linkage device 12 converts the data of the digital substation mixed operating system into a protocol suitable for the connected external system and transmits the converted data to the external system. In a digital substation mixed operating system according to an embodiment of the present invention, the substation control device 10 includes a substation automation operating device 11 and a substation automation information linkage device 12, and in addition, a substation automation information monitoring and diagnosis device, etc. Other devices such as may be included.

2, one field information processing unit 50 is connected to two lower access switches 40 and four communication channels to monitor, control, and measure data of a plurality of field facilities 60 in a substation control device ( 10) It transmits and receives with the substation automation operation device 11 and the substation automation information linkage device 12.

3 is a view showing an embodiment of the configuration diagram of the field information processing unit shown in FIG. Referring to FIG. 3, the field information processing unit 50 includes an input/output device 53, a first field information relay device 51, and a second field information relay device 52. Although not shown in FIG. 3, the on-site information processing unit 50 includes a power supply unit and an input/output device for supplying power to the input/output device 53, the first field information relay device 51, and the second field information relay device 52. (53), a central control unit that controls the first on-site information relay device 51 and the second on-site information relay device 52, and a plurality of communication channels for transmitting and receiving data with the substation control device 10 are recorded. It may further include storage in which the channel list is stored.

In order to establish a communication channel for transmitting the monitoring and measurement data of the field facility 60 to the substation control device 10, the central control unit of the on-site information processing panel has a plurality of on-site information relay devices 51 and 52, and a plurality of Any one of a plurality of on-site information relay devices (51, 52) based on the communication status of each of the lower access switches (41, 42), a plurality of backbone switches (31, 32), and a plurality of upper access switches (21, 22) , Any one of the plurality of lower access switches 41 and 42, any one of the plurality of backbone switches 31 and 32, and any one of the plurality of upper access switches 21 and 22 may be selected.

The storage stores a communication channel list in which a plurality of communication channels for transmitting and receiving monitoring, measurement, and control data of field facilities between the field information processing panel 50 and the substation control device 10 are recorded. In the communication channel list, a plurality of communication paths for transmitting and receiving data between the on-site information processing panel 50 and the substation control device 10 are recorded. In the communication channel list, the addresses of the field information relay devices 51 and 52, the lower access switches 41 and 42, the backbone switches 31 and 32, and the upper access switches 41 and 42 constituting each communication channel are recorded. . More specifically, the communication channel list records a communication channel for transmitting and receiving data between the field information processing panel 50 and the substation control device 10, and each communication channel includes an address of a switch constituting the corresponding communication channel. . The communication channel for transmitting and receiving data between the on-site information processing panel 50 and the substation control device 10 is one of the plurality of on-site information relay devices 51 and 52, and one of the plurality of lower access switches 41 and 42, respectively. Any one, any one of a plurality of backbone switches 31 and 32, and any one of a plurality of upper access switches 21 and 22 may be configured, and a plurality of communication channels may be established. For example, the first communication channel is composed of a first field information relay device 51, a first access switch 41, a first backbone switch 31, and a third access switch 21, and the second communication When the channel is composed of a second field information relay device 52, a second access switch 42, a second backbone switch 32, and a fourth access switch 22, the first communication channel is the first communication channel in the communication channel list. Including the addresses of the first on-site information relay device 51, the first access switch 41, the first backbone switch 31, and the third access switch 21 constituting one communication channel, and a second communication channel Includes addresses of the second field information relay device 52, the second access switch 42, the second backbone switch 32, and the fourth access switch 22 constituting the second communication channel.

In addition, the communication channel list records the communication availability of each communication channel, data transmission rate, quality of service (QoS), communication protocol, and the like. The communication channel list determines the priority of each communication channel included in the communication channel list based on communication availability, data transmission rate, and QoS, and stores the determined priority. The on-site information processing unit 50 periodically measures the communication availability of each communication channel, data transmission rate, QoS, etc., and periodically updates the communication channel list based on the communication availability of the measured communication channel, data transmission rate, and QoS. . The communication channel list updates the priority of each communication channel based on communication availability, data transmission rate, and QoS of the updated communication channel.

The input/output device 53 plays a role of monitoring and controlling the field equipment 60. The input/output device 53 may be connected to a plurality of field facilities 60 to monitor and control a plurality of field facilities 60. More specifically, the input/output device 53 monitors the field facility 60 while monitoring and measuring data of the field facility 60, the first field information relay device 51 and the second field information relay device 52. Enter as In addition, the input/output device 53 receives data for controlling the field equipment 60 from the first field information relay device 51 or the second field information relay device 52, and according to the received control data, the field equipment Control 60. For example, in the case of any one circuit breaker among a plurality of field facilities 60, if the input/output device 53 has received monitoring and measurement data indicating an abnormal state of the circuit breaker, then the input/output device 53 provides the first field information. Data indicating a trip of the circuit breaker may be received from the relay device 51 or the second field information relay device 52. When the input/output device 53 receives data instructing the breaker to trip, it trips the breaker according to the received data. The input/output device 53 is connected to each field facility 60 by wire or wirelessly.

The input/output device 53 is a digital input module (DIM) that digitally receives monitoring data indicating the status of the field facility 60, and a digital output module (DOM) that outputs control data of the field facility 60. , Digital Output Module), CT (Current Transformer) that measures the current of the field facility 60, a transformer (PT, Potential Transformer) that measures the voltage of the field facility 60, and the measured values of the current transformer and the transformer, etc. It is composed of an AIU (Analog Input Unit) that receives an analog value of the same field facility 60 and converts it into data representing a digital value. The input/output device 53 shown in FIG. 3 is shown to include one digital input module and a digital output module, but the input/output device 53 may include a plurality of digital input modules and digital output modules. In addition, the input/output device 53 further includes a multi measurement unit (MMU) that calculates active power, reactive power, frequency power factor, and amount of electricity from voltage and current of field equipment 60 in addition to the above-described components. can do. The components of the on-site information processing panel 50 are installed in a sub-rack structure in the cabinet housing as known to those of ordinary skill in the art to which the present embodiment belongs, and other components may be added. In order to prevent blurring of the features of this embodiment, a more detailed description of this will be omitted.

The first field information relay device 51 and the second field information relay device 52 transmit monitoring and measurement data of the field facility 60 input from the input/output device 53 to the lower access switch 40, and It serves to receive control data of the field equipment 60 from the access switch 40. Each of the field information relay devices 51 and 52 has two NIC (Network Information Center) ports connected to an external access switch, and an internal communication port connected to other field information relay devices.

More specifically, one of the two NIC ports of the first field information relay device 51 is connected to the first access switch 41, and the other port is connected to the second access switch 42, so that the first The field information relay device 51 is connected in parallel with each of the first access switch 41 and the second access switch 42. The first field information relay device 51 transmits the monitoring and measurement data of the field facility 60 input from the input/output device 53 to one of the first access switch 41 and the second access switch 42. In addition, the first field information relay device 51 receives control data for controlling the field facility 60 transmitted from the first access switch 41 or the second access switch 42, and receives the received control data. Input to the input/output device 53. In addition, the second on-site information relay device 52, similar to the first on-site information relay device 51, transmits the monitoring and measurement data of the input/output device 53 among the first access switch 41 and the second access switch 42. The control data of the field facility 60 transmitted from either one of the first access switch 41 and the second access switch 42 is input to the input/output device 53 by transmitting to either one.

The first on-site information relay device 51 and the second on-site information relay device 52 are connected to the heartbeat of each of the on-site information relay devices 51 and 52 through the internal communication ports of each of the on-site information relay devices 51 and 52. heartbeat) signals are exchanged. The heartbeat signal will be described in detail below. Each of these field information relay devices 51 and 52 is a modem that converts the data signal received from the lower access switch 40 to meet the data standard of the input/output device 53, and each of the field information relay devices 51 and 52 It may further include a communication control unit (CCU, Comunication Control Unit) for controlling the communication and recovering the communication error. The communication control unit of the on-site information relay device switches to the operating state or standby state of each on-site information relay device based on the heartbeat signal. In addition, the communication control unit of the field information relay device (51, 52) is based on the control data of the field facility (60) received from the substation control device (10), the lower access switch (41, 42), the backbone switch (31, 32), the communication state of each of the upper access switches 21 and 22 can be identified. A method for the on-site information relay device to identify the communication state between the access switch and the backbone switch will be described in detail below.

As described above, the on-site information processing unit 50 transmits the monitoring and measurement data of the on-site facility 60 through the lower access switch 40, the backbone switches 31 and 32, and the upper access switch 20. 10), and receives the control data of the field facility 60 from the substation control device 10 through the lower access switch 40, the backbone switches 31 and 32, and the upper access switch 20. The on-site information processing unit 50 establishes a communication channel for transmitting and receiving data with the substation control device 10, and transmits and receives monitoring, control, and measurement data through the established communication channel. In the digital substation mixed operating system according to an embodiment of the present invention, the on-site information processing unit 50 includes a substation control device 10 and an on-site information relay device 51 and 52. A plurality of communication channels including the lower access switch 40, the backbone switches 31 and 32, and the upper access switch 20 can be established. The on-site information processing unit 50 may transmit and receive data using at least one communication channel among a plurality of communication channels established with the substation control device 10.

2 and 3, each of a plurality of communication channels established between the on-site information processing unit 50 and the substation automation operating device 11 is on-site information relay devices 51 and 52. It consists of a lower access switch 40, backbone switches 31 and 32, and an upper access switch 20. More specifically, each communication channel is one of the two on-site information relay devices (51, 52), one of the lower access switches (41, 42) disposed between the on-site information processing unit 50 and the backbone switches (31, 32). , One of the backbone switches 31 and 32 constituting the backbone network, and one of the upper access switches 21 and 22 positioned between the backbone switches 31 and 32 and the substation control device 10. The on-site information processing unit 50 includes, for example, a first on-site information relay device 51 of the on-site information processing unit 50, a first access switch 41, and a first communication channel between the substation automation operating device 11. A first communication channel consisting of a backbone switch 31, a third access switch 21, and a substation automation operating device 11, a second field information relay device 52 of the field information processing unit 50, and a first access A second communication channel consisting of a switch 41, a first backbone switch 31, a fourth access switch 22, and a substation automation operating device 11, the first field information relay device of the field information processing unit 50 ( 51), a second access switch 42, a first backbone switch 31, a third access switch 21, and a third communication channel composed of a substation automation operating device 11, and the field information processing unit 50 2 Including a fourth communication channel composed of a field information relay device 52, a first access switch 41, a second backbone switch 32, a fourth access switch 22, and a substation automation operating device 11 do.

The detailed data transmission/reception process between the on-site information processing unit 50 and the substation automation operating device 11 is as follows. For example, in the first communication channel, the on-site information processing unit 50 transmits the monitoring and measurement data of the on-site equipment 60 through the first on-site information relay device 51 of the on-site information processing unit 50 41), and the first access switch 41 transmits the received monitoring and measurement data of the field facility 60 to the first backbone switch 31, and the first backbone switch 31 is the received field facility The monitoring and measurement data of 60 is transmitted to the third access switch 21, and the third access switch 21 transmits the received monitoring and measurement data of the field equipment 60 to the substation automation operating device 11 do. Similarly, the on-site information processing unit 50 from the substation automation operating device 11 through the third access switch 21, the first backbone switch 31 and the first access switch 21 Receive control data.

The on-site information processing unit 50 is a field facility 60 between the on-site information processing unit 50 and the substation automation operating system 11 based on the communication status of the on-site information relay device, the lower access switch, the backbone switch, and the upper access switch. The communication channel to transmit the monitoring and measurement data of is determined, and the field information processing unit 50 transmits the monitoring and measurement data of the field facility 60 through the determined communication channel, and the control data of the field facility 60 is transformed. It receives from the automation operating device (11). The on-site information processing unit 50 includes a plurality of on-site information relay devices (51, 52), a plurality of sub-access switches (41, 42), and a plurality of backbone switches (31, 32). And any one of a plurality of field information relay devices (51, 52), a plurality of lower access switches (41, 42), a plurality of backbones based on the communication state of each of the plurality of upper access switches (21, 22) By selecting any one of the switches 31 and 32 and one of the plurality of upper access switches 21 and 22, a communication channel for transmitting and receiving data between the on-site information processing panel 50 and the substation automation operating device 11 is selected. Build.

When described in detail with reference to the embodiment shown in FIGS. 2 and 3, the field information processing unit 50 includes a plurality of field information relay devices 51 and 52, a plurality of sub-access switches 41 and 42, and a plurality of Backbone switch (31, 32). And a communication channel for transmitting/receiving data is established by selecting a device capable of communicating among the plurality of upper access switches 21 and 22, respectively. The on-site information processing unit 50 selects an on-site information relay device in an operating state among the first on-site information relay device 51 and the second on-site information relay device 52, and the first access switch 41 and the second access switch Among (42) an error-free access switch is selected, a communication capable state is selected among the first backbone switch 31 and the second backbone switch 32, and a third access switch ( 21) and the fourth access switch 22, an access switch in a state in which communication is possible is selected. If a plurality of lower access switches, a plurality of backbone switches, and a plurality of upper access switches are all capable of communication, the on-site information processing unit 50 has a high data rate or QoS based on the data rate and QoS to each switch. It is possible to select a switch in which a high communication path can be established. Alternatively, when a plurality of lower access switches, a plurality of backbone switches, and a plurality of upper access switches are all capable of communication, the on-site information processing unit 50 selects a switch with a higher priority based on the priority for each switch input in advance. You can select and establish a communication channel.

The on-site information processing unit 50 comprises on-site information relay devices 51 and 52, lower access switches 41 and 42, and backbone switches 31 and 32 that constitute a communication channel for transmitting and receiving data to and from the current substation control device 10. ), and at least one of the upper access switches 21 and 22, the on-site information processing unit 50 may be configured to any one of the plurality of on-site information relay devices 51 and 52, and a plurality of lower access switches 41 , 42), any one of the plurality of backbone switches 31 and 32, and any one of the plurality of upper access switches 21 and 22 are selected again to establish a communication channel again. For example, field information relay devices 51 and 52, lower access switches 41 and 42, backbone switches 31 and 32, which constitute a communication channel for transmitting and receiving data with the current substation control device 10, and When at least one of the upper access switches 21 and 22 changes to a state in which communication is disabled, the on-site information processing unit 50 cannot transmit the monitoring and measurement data of the on-site facility 60 to the substation control device 10, The control data of the field facility 60 cannot be received from the substation control device 10. The on-site information processing unit 50 includes on-site information relay devices (51, 52), lower access switches (41, 42), which are in a communication-capable state, except for the on-site information relay devices (51, 52) or switches that have been changed to a state in which communication is disabled. The backbone switch (31, 32) and the upper access switch (21, 22) are selected again to re-establish the communication channel for transmitting the monitoring and measurement data of the field facility 60, and the field facility through the newly established communication channel The monitoring and measurement data of (60) is transmitted to the substation control device (10). In addition, the substation control device 10 transmits the control data of the field facility 60 to the field information processing panel 50 through a newly established communication channel.

For example, an error occurs in the second field information relay device 52, the second access switch 42, the second backbone switch 31, and the fourth access switch 22 of the field information processing unit 50, When the first field information relay device 51, the first access switch 41, the first backbone switch 31, and the third access switch 21 operate normally, the field information processing unit 50 is Data is transmitted/received through a first communication channel composed of a first on-site information relay device 51, a first access switch 41, a first backbone switch 31, and a third access switch 21.

In addition, the on-site information processing unit 50 may determine a communication channel based on a data transmission rate of each communication channel, a quality of service (QoS) of each communication channel, a communication protocol, in addition to whether or not an error occurs in each device. Hereinafter, a process of determining a communication channel will be described in detail.

First, the on-site information processing unit 50 determines one of the first on-site information relay device 51 and the second on-site information relay device 52 to transmit and receive data. The first on-site information relay device 51 and the second on-site information relay device 52 exchange a heartbeat signal including information of each on-site information relay device. The heartbeat signal includes whether an error occurs in the access switch connected to each field information relay device, whether a representative IP address indicating the address of the field information processing unit 50 is allocated, whether an IEC 61850 service, or whether an error has occurred in the NIC port. Referring to FIG. 3, the first field information relay device 51 includes whether an error occurs in the NIC port connected to each of the first access switch 41 and the second access switch 42, and the first field information relay device 51 A heartbeat signal including whether a representative IP address has been assigned to and whether the port has been switched to any of the two NIC ports is input to the second field information relay device 52. The second field information relay device 52 also inputs a heartbeat signal to the first field information relay device 51.

The first on-site information relay device 51 and the second on-site information relay device 52 switch to an active state or a standby state based on the heartbeat signal of each of the on-site information relay devices. The operating state of the field information relay device is a state in which the field information relay device is connected to the lower access switch 40 to transmit and receive data. The standby status of the on-site information relay device is a status in which the on-site information relay device waits without transmitting and receiving data with the lower access switch 40, and communication is disabled due to an error in the operating status of the on-site information relay device, and the lower access switch ( 40) When it is not possible to transmit and receive data, the on-site information relay device in a standby state is switched to an operating state, so that data can be transmitted and received with the lower access switch 40. When one of the two on-site information relay devices transmits and receives data to and from the lower access switch 40 in an operating state, the other is converted to a standby state or maintains a standby state. The field information processing unit 50 transmits and receives the monitoring, control and measurement data of the field facility 60 using only one field information relay device in an operating state. As described above, the on-site information processing unit 50 selects a lower access switch, a backbone switch, and an upper access switch between the substation control devices 10 to establish a communication channel for transmitting and receiving data. At this time, the established communication channel is a communication channel including a field information relay device in an operating state.

When described in detail through a specific embodiment, the communication control unit of the first on-site information relay device 51 is based on the heartbeat signal of the second on-site information relay device 52. Switch state. The heartbeat signal of the second field information relay device 52 indicates that an error has occurred in two NIC ports of the second field information relay device 52, or the representative IP address assigned to the second field information relay device 52 is When it is indicated that it is not assigned, the communication control unit of the first field information relay device 51 maintains or switches to the operating state of the first field information relay device 51. In this case, the communication control unit of the second field information relay device 52 maintains or switches the state of the second field information relay device 52 to the standby state.

As described above, the communication channel for transmitting and receiving data between the on-site information processing panel 50 and the substation control device 10 includes an on-site information relay device in an operating state. For example, when an error occurs in both NIC ports of the first field information relay device 51 in the current operating state or a representative IP address is not assigned, the first field information relay device 51 is provided with two NIC ports. A heartbeat signal indicating that an error has occurred or that a representative IP address has not been assigned is input to the second field information relay device 52. The second on-site information relay device 52 converts the state of the second on-site information relay device 52 from a standby state to an operating state according to the heartbeat signal of the first on-site information relay device 51. When a change in the state of the on-site information relay device occurs as in the above example, the on-site information processing unit 50 rebuilds a communication channel for transmitting and receiving data with the substation control device 10. The on-site information processing unit 50 selects a second on-site information relay device 52 from among a plurality of on-site information relay devices 51 and 52, and includes a plurality of lower access switches 41 and 42, and a plurality of backbone switches 31, 32) and the plurality of upper access switches 21, 22, any one of a plurality of lower access switches 41 and 42, any one of a plurality of backbone switches 31 and 32, a plurality of upper Any one of the access switches 21 and 22 is selected again to establish a communication channel with the substation control device 10 again.

When the first on-site information relay device 51 is in an operating state, the on-site information processing unit 50 transfers the monitoring and measurement data of the on-site facility 60 to the substation automation operating device 11 or the substation automation information linking device 12. In order to transmit, the monitoring and measurement data of the field facility 60 is transmitted to the first access switch 41 or the second access switch 42 through the first field information relay device 51. The first field information relay device 51 transmits and receives monitoring, control, and measurement data of the field facility 60 through a communication channel connected to a NIC port connected to each access switch. The first field information relay device 51 is between the field information processing unit 50 and the substation automation operating device 11 and the substation automation information linking device 12 through the control data of the field facility 60 received through the NIC port. The communication state of the lower access switch 40, the backbone switches 31 and 32, and the upper access switch 20 positioned at is identified.

For example, the first field information relay device 51 identifies a communication channel through which control data received from the substation automation operating device 11 is transmitted. For example, the communication control unit of the first field information relay device 51 is the address of the first access switch 41, the backbone switches 31 and 32, and the third access switch 41 stored in the header of the control data. The communication channel through which control data is transmitted can be identified. The first on-site information relay device 51 identifies that the communication state of the first access switch 41, the backbone switches 31 and 32, and the third access switch 41 included in the identified communication channel is normal.

In another embodiment, the first field information relay device 51 transmits monitoring and measurement data of the field facility 60 to the lower access switch 40 connected to the NIC port, and in response thereto, the lower access switch 40 When an acknowledgment is received from, the communication state of this access switch is identified as normal. In contrast, when the first on-site information relay device 51 does not receive an acknowledgment from the access switch, the communication state of the access switch is identified as an error.

The first on-site information relay device 51 communicates with the backbone switches 31 and 32 connected to the lower access switch 40 from the lower access switch 40 and the upper access switch 20 connected to the backbone switches 31 and 32 Data indicating the state may be received together with a confirmation response corresponding to the monitoring and measurement data of the field facility 60 or control data of the field facility 60. For a more specific example, the first on-site information relay device 51 receives an acknowledgment from the first access switch 41 in response to the monitoring and measurement data of the site facility 60, and the first Data indicating the communication state of the first backbone switch 31, the second backbone switch 32, the third access switch 41, and the fourth access switch 42 connected to the access switch 41 are received together.

The first on-site information relay device 51 is based on the error of the lower access switch 40, the backbone switches 31 and 32, and the upper access switch 20 of the digital substation mixed operating system. Decide which access switch and backbone switch will transmit monitoring and measurement data. For example, when the communication state of the second access switch 42, the second backbone switch 32, and the fourth access switch 22 is an error, the first field information relay device 51 is the first access switch (41), the first backbone switch 31 and the fourth access switch 21 are selected as a lower access switch, a backbone switch, and an upper access switch to transmit and receive monitoring, measurement and control data of the field facility 60. Accordingly, the on-site information processing unit 50 includes a first on-site information relay device 51, a first access switch 41, a first backbone switch 31, a fourth access switch 21, and a substation automation operating device 11 ), and transmits and receives the monitoring, control, and measurement data of the field facility 60.

In another embodiment, the field information processing unit 50 transmits monitoring and measurement data of at least one field facility to the substation control device 10 and receives control data of at least one field facility from the substation control device 10 A communication channel is established on the basis of a communication channel list including a plurality of communication channels corresponding to the communication path. More specifically, the on-site information processing unit 50 determines a communication channel with the highest priority among a plurality of communication channels recorded in the communication channel list, and includes on-site information relay devices 51 and 52, and The access switch 40, the backbone switches 31 and 32, and the upper access switch 20 are selected to establish a communication channel.

The on-site information processing unit 50 is one of the two on-site information relay devices in operation, and allocates a representative IP address, which is an IP address assigned to the on-site information processing unit 50. The on-site information processing unit 50 allocates a representative IP address to the on-site information relay device in an operating state, and retrieves the representative IP address from the on-site information relay device in a standby state. The on-site information processing unit 50 allocates the same representative IP address when the first on-site information relay device 51 and the second on-site information relay device 52 are each in an operating state. The on-site information processing unit 50 allocates a representative IP address to only one of the two on-site information relay devices in operation, which is in operation, so that the device outside the on-site information processing unit 50 allows two on-site information relay devices to be It is recognized as if one field information relay device is operating. Even if the field information relay device that communicates with the current substation control device 10 in the field information processing unit 50 is converted to another field information relay device and communicates with the substation control device 10, the same IP address is applied to the field information relay device before and after the conversion. Because is assigned, the substation control device is recognized as the same field information relay device. Accordingly, even if the on-site information relay device is switched, the substation control device 10 does not need to request the IP address of the switched on-site information relay device from the on-site information processing unit 50, so that a new IP address is allocated and a communication channel is established again. There is no gap in data transmission/reception that can occur.

In the field information processing unit 50, the input/output device 53 transmits the monitoring and measurement data of the field facility 60 received from the field facility 60 to the first field information relay device 51 and the second field information relay device 52. ) Enter all. As described above, one of the two on-site information relay devices included in the on-site information processing unit 50 exchanges data with the lower access switch 40 as an operation state, and the other on-site information relay device is As a standby state, data is not exchanged with the lower access switch 40. The input/output device 53 does not input monitoring and measurement data of the field equipment 60 only to the field information relay device in the operating state among the two field information relay devices, but also the field equipment 60 as the field information relay device in the standby state. Input monitoring and measurement data.

The input/output device 53 according to an embodiment of the present invention inputs the data of the field equipment 60 to all the field information relay devices regardless of the operation state or the standby state of the field information relay device. There is no need for the input/output device 53 to switch whether or not to input data according to the change. In addition, there is no need for the input/output device 53 to determine which field information relay device to input the monitoring and measurement data of the field facility based on the state of the field information relay device. Accordingly, the input/output device 53 can prevent an error of inputting monitoring and measurement data of the field facility 60 to the field information relay device in a standby state. In addition, the input/output device 53 may stably input monitoring and measurement data of the field facility 60 to the field information relay device.

As described above, the digital substation mixed operating system according to the embodiments of the present invention includes a plurality of communication channels for transmitting and receiving data to and from the substation control device by one on-site information processing unit including two on-site information relay devices. By setting the channel, even if an error occurs in some of the communication channels among the plurality of communication channels, it is possible to stably transmit and receive the monitoring, control and measurement data of the field facility between the field information processing panel and the substation control device. Accordingly, even if an error occurs in some devices of the mixed operation system for digital substations, monitoring and measurement data of field facilities are received through other extra communication channels, and control data of field facilities is transmitted. Equipment can be controlled stably. The substation control device greatly improves the system stability and reliability of the digital substation mixed operating system.

In addition, according to embodiments of the present invention, the input/output device of the on-site information processing panel that receives monitoring and control data from the on-site facility monitors and controls the on-site facility with both the on-site information processing panel in the operating state as well as the on-site information processing panel in the standby state. Do not input data by converting the monitoring and measurement data of the field facility according to the field information processing unit in operation. Accordingly, the input/output device can stably input monitoring and measurement data of the field facility to the field information relay device.

So far, we have looked at the center of the preferred embodiments for the present invention. Those of ordinary skill in the art to which the present invention pertains will be able to understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from an illustrative point of view rather than a limiting point of view. The scope of the present invention is shown in the claims rather than the above description, and all differences within the scope equivalent thereto should be interpreted as being included in the present invention.

10: substation control device
20: upper access switch
30: backbone network
40: lower access switch
50: On-site information processing group
51: first on-site information relay device 52: second on-site information relay device
53: input/output device
60: field facilities

Claims (5)

In the digital substation mixed operating system,
At least one field facility installed in the substation;
The at least one field facility is connected to the at least one field facility to receive monitoring and measurement data representing the state of the at least one field facility from the at least one field facility, and control data for controlling the operation of the at least one field facility. On-site information processing team that transmits to on-site facilities of
A plurality of lower access switches respectively connected to the on-site information processing unit to receive monitoring and measurement data of the at least one on-site facility from the on-site information processing unit and to transmit control data to the on-site information processing unit;
A plurality of backbone switches connected in parallel to each of the plurality of lower access switches;
A plurality of upper access switches connected in parallel to each of the plurality of backbone switches; And
A substation control device connected in parallel to the plurality of upper access switches and controlling the at least one field facility based on data transmitted from any one of the plurality of upper access switches,
The on-site information processing team
An input/output device connected to the at least one field facility to receive and output monitoring and measurement data from the at least one field facility; And
It is connected to each of the plurality of lower access switches and transmits the monitoring and measurement data of the at least one field facility output by the input/output device to one of the plurality of lower access switches, and any one of the plurality of lower access switches, the It includes a plurality of on-site information relay devices for receiving control data of at least one field facility,
The field information processing unit is any one of the plurality of lower access switches based on the communication states of the plurality of lower access switches, the plurality of backbone switches, the plurality of upper access switches, and the plurality of site information relay devices, Monitoring and measurement of the at least one field facility using a communication channel established by selecting any one of the plurality of backbone switches, any one of the plurality of upper access switches, and any one of the plurality of field information relay devices Send the data to the substation control device,
The on-site information processing unit is one of the plurality of lower access switches according to a change in the communication state of at least one of the plurality of lower access switches, the plurality of backbone switches, the plurality of upper access switches, and the plurality of field information relay devices. The at least one field facility using a communication channel established by reselecting any one of the plurality of backbone switches, any one of the plurality of upper access switches, and any one of the plurality of field information relay devices Transmits the monitoring and measurement data of the substation to the substation control device,
Wherein the input/output device inputs monitoring and measurement data of the at least one field facility to all of the plurality of field information relay devices. The method of claim 1,
The on-site information processing team
A storage for storing a communication channel list in which a plurality of communication channels for transmitting and receiving monitoring, measurement, and control data of the at least one field facility between the field information processing panel and the substation control device are recorded,
The communication channel list includes an address of any one of the plurality of on-site information relay devices constituting each of the communication channels, an address of any of the plurality of lower access switches, an address of any of the plurality of backbone switches, and the Includes a priority determined based on an address of any one of a plurality of upper access switches, whether communication is possible for each communication channel, a data transmission rate, and a quality of service (QoS),
The on-site information processing unit is based on the communication channel list, any one of the plurality of lower access switches, any one of the plurality of backbone switches, any one of the plurality of upper access switches, and one of the plurality of on-site information relay devices Digital substation mixed operating system, characterized in that selecting any one. The method of claim 1,
A first field information relay device among the plurality of field information relay devices is in an operating state of transmitting and receiving data with any one of the plurality of lower access switches, and a second field information relay device among the plurality of field information relay devices It is in a standby state that does not transmit or receive data to and from the lower access switches,
The established communication channel comprises the first on-site information relay device in the operating state. The method of claim 3,
The first on-site information relay device and the second on-site information relay device include whether an error occurs in an access switch connected to each of the on-site information relay devices, whether a representative IP address indicating the address of the on-site information processing unit is allocated, and an error in the NIC port. Send and receive a heartbeat signal indicating whether or not it has occurred,
Each of the first on-site information relay device and the second on-site information relay device switches to an operating state or a standby state according to a heartbeat signal from another on-site information relay device,
When the heartbeat signal of the first on-site information relay device indicates that an error in the NIC port has occurred or that a representative IP address has not been assigned, the first on-site information relay device is switched to a standby state and the second on-site information relay device is Switches to the operating state,
The on-site information processing unit uses a communication channel constructed with any one of the second on-site information relay device, the plurality of backbone switches, and one of the plurality of upper access switches to monitor and measure data of the at least one field facility. Digital substation mixed operating system, characterized in that transmitting to the substation control device. The method of claim 4,
A representative IP address is assigned to a field information relay device in an operational state among the first field information relay device and the second field information relay device, and a standby state among the first field information relay device and the second field information relay device. By recovering the representative IP address from the on-site information relay device, the same representative IP address is assigned to the first on-site information relay device or the second on-site information relay device in an operating state.

Images