WO2023031995A1

WO2023031995A1 - Relay unit, electric power station system, and electric power station system update method

Info

Publication number: WO2023031995A1
Application number: PCT/JP2021/031705
Authority: WO
Inventors: 渉山守; 和也岡田; 将太福島; 正中村; 浩一浜松; 紘之白川
Original assignee: 株式会社東芝; 東芝エネルギーシステムズ株式会社
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2023-03-09
Also published as: JP7528379B2; JPWO2023031995A1

Abstract

This relay unit of an embodiment is configured such that an AD conversion unit, a calculation processing unit, and an input/output unit can be internally divided. The AD conversion unit converts an input analog signal to a digital signal. The calculation processing unit performs protection control for a power facility. The input/output unit is connected to the power facility. At least the calculation processing unit and one or both of the AD conversion unit and the input/output unit communicate with each other using both a first network and a second network which are applied to an electric power station premise that is the outside of the relay unit.

Description

Relay units, electrical substation systems, and methods of updating electrical substation systems

The present invention relates to a relay unit, an electrical station system, and an update method for an electrical station system.

Conventionally, a system for smoothly processing information at an electrical station has been disclosed (see Patent Document 1, for example). However, in the invention of Patent Literature 1, there are cases in which consideration is not given to realizing an appropriate communication environment in various equipment situations.

Japanese Patent Application Laid-Open No. 2008-300942

One of the objectives of the problem to be solved by the present invention is to provide a relay unit, an electrical station system, and an update method for the electrical station system that support the realization of a more appropriate communication environment. More specifically, the object is to reduce the load when transitioning from existing equipment to desired equipment. A desired facility is, for example, a facility having a desired communication environment. The load is, for example, modification of hardware, update of software, or the like.

The relay unit of the embodiment is configured so that the AD conversion section, the arithmetic processing section, and the input/output section can be divided inside. The AD converter converts the input analog signal into a digital signal. The arithmetic processing unit performs protection control processing for power equipment. The input/output unit inputs and outputs signals to and from power equipment. At least the arithmetic processing unit and one or both of the AD conversion unit and the input/output unit use both a first network and a second network applied to the electric station premises outside the relay unit. to communicate.

The figure which shows an example of a structure of the electric station system 1. FIG. The figure which shows an example of a structure containing protection unit (current) 42X. FIG. 4 is a diagram for explaining a process of connecting a protection unit (current) 42X and a control panel 30 via a first communication line CL2; FIG. 11 is a diagram for explaining a process of connecting a protection unit (current) 42X and a process-level device or device via a second communication line CL3; The figure which shows an example of the structure by which the protection unit (new) 42 was installed. FIG. 4 is a diagram for explaining a process of connecting a protection unit (new) 42 and a control panel 30 via a first communication line CL2; FIG. 10 is a diagram for explaining a process of connecting the protection unit (new) 42 and process-level equipment or devices via a second communication line CL3; The figure which shows an example of a structure of the modification of the electric station system 1. FIG. 4 is a flowchart related to equipment update when the power station system 1 is updated.

Hereinafter, the relay unit, electrical station system, and method for updating the electrical station system of the embodiment will be described with reference to the drawings. Here, the electrical station includes a power station, a substation, a switching station, a factory, and an electrical station that handles power receiving and transforming systems for general industries. A substation system will be described below as an example of a typical electric station system.

FIG. 1 is a diagram showing an example of the configuration of the electrical station system 1. FIG. The electrical station system 1 is divided into a station level hierarchy, a bay level hierarchy, and a process level hierarchy. It has equipment and devices provided in The bay level is the hierarchy between the station level and the process level.

[Station level]
At the station level, for example, ITC (Intelligent Tele-communicate System) 12 (12-1, 12-2), HMI (Human Machine Interface) 14, and first communication lines CL1, CL2 are provided. The first communication lines CL1 and CL2 (first network) are sometimes called station buses, for example. The first communication lines CL1 and CL2 are communication lines that constitute a LAN (Local Area Network) in a predetermined area such as an electrical station. One of the communication lines CL1 and CL2 may be omitted (for example, one set of communication lines may be provided). The ITC 12 is an example of a "relay device".

The ITC 12 is connected to the first communication lines CL1 and CL2. ITC is sometimes called GW (Gate Way). The ITC 12 is a device that relays transmission and reception of acquired information. The acquired information is information acquired from devices and devices connected to the first communication lines CL1 and CL2. The ITC 12 is a device that relays communication with devices (for example, HMI 14) provided within the power station and outside the power station (for example, computer systems such as system control and power supply in equipment outside the power station).

The HMI 14 is connected to the ITC 12. The HMI 14 and ITC 12 are connected via, for example, a dedicated line. The HMI 14 has, for example, a display, and displays the information transmitted from the ITC 12 on the display. The display unit displays, for example, the operating states of the devices and devices (circuit breakers and transformers) provided in the electric station system 1, and the electric quantity (current, voltage, active/reactive power) of the transmission line. The operator can refer to the information displayed on the display unit to check the status of the devices and equipment of the power station system 1 and the operating status of the power station system 1, and control the devices and equipment. can give orders. This makes it possible to use/lock the device and control the opening and closing of the circuit breaker.

[Bay level]
The bay level includes, for example, a power transmission line control panel 30-1, a bus control panel 30-2, transmission line protection panels 40-1 to 40-2, and a bus protection panel 40-3. 40-4 is provided. The transmission line control panel 30-1 is arranged for the purpose of monitoring, controlling and measuring equipment on the transmission line. Upon receiving the control command, the PIU 50 relays the control command to the PIU 50 and transmits the control command to the PIU 50, and the PIU 50 controls the opening and closing of the device such as a circuit breaker of the transmission line. Also, the PIU 50 takes in an AC electric quantity from a meter or a transformer, converts it to a digital value, transmits it to the transmission line control panel 30-1, and sends it to the ITC 12 via the transmission line control panel 30-1. The ITC 12 also transmits information out of the substation and to the HMI 14 . The HMI 14 uses the received digitally converted information to display the electric quantity of the transmission line on the display unit. The development status of the equipment is similarly taken in from the PIU 50, and the processing in the ITC 12 and HMI 14 via the power transmission line control panel 30-1 is the same as the above-described electricity measurement. The busbar control panel 30-2 also has the same function as the above-described power transmission line control panel 30-1 for the busbar. The transmission line protection boards 40-1 and 40-2 are two series of protection boards, which are arranged for the purpose of detecting and removing system faults in the transmission line, and take in the digitally converted AC electric quantity from the PIU 50, System fault calculation (current differential relay calculation, etc.) is performed, and if the calculation result is determined to be a system fault, a circuit breaker cutoff command is sent from the protection boards 40-1 and 40-2 for the transmission line to the PIU 50, The PIU 50 outputs a command to open the circuit breaker to the transmission line circuit breaker. The protective panels 40-3 and 40-4 for busbars also have the same function as the protective panels 40-1 and 40-2 for the transmission lines described above. In the example of FIG. 1, the electric station system 1 is described as having two control panels 30 and four protection panels 40, but the number of control panels 30 and the number of protection panels 40 are not limited. Hereinafter, when the control boards 30-1 and 30-2 are not distinguished, they may be referred to as the control board 30, and when the protection boards 40-1 to 40-4 are not distinguished, they may be referred to as the protection board 40. . Also, the BCU 32 mounted on the control panel 30 and the protection unit mounted on the protection panel are sometimes referred to as IEDs (Intelligent Electrical Devices).

The control panel 30 is connected to the first communication lines CL1, CL2 and the second communication line CL4. The control panel 30 includes a BCU (Bay Control Unit) 32 (32-1, 32-2). The BCU 32 is provided for each line that supplies power to a load in an electric station, and monitors and controls power equipment on the line. The BCU 32 acquires equipment status (switching information) of equipment such as circuit breakers, disconnecting switches, grounding devices, etc., electric quantity information and various equipment failure information from the PIU 50 provided in the line to be monitored, and the acquired information Information for monitoring and controlling the operational status of transmission lines is handled based on The electricity quantity information is information about the power supplied to the section of the transmission line, and is, for example, information indicating the voltage value and the current value of the power supplied to the section. The equipment status information is information related to the operation of circuit breakers controlled by the control panel 30 or the protection panel 40, disconnectors, disconnectors with grounding switches, etc. For example, whether the circuit breakers are connected or not. This is information indicating whether or not it is in a cut-off state. The failure information is failure information of various devices arranged on the line. The BCU 32 transmits the generated various information to the ITC 12 or the like.

The BCU 32 acquires, for example, information about the state of the system in the line and the state of various facilities from the devices and equipment connected to the first communication lines CL1, CL2 and the second communication lines CL3, CL4. Further, the BCU 32 can perform opening/closing control of switches such as circuit breakers and disconnectors for changing the configuration of the system in the line, based on its own calculation result or operator's instruction.

The protection board 40 has a protection unit 42 (the protection boards 40-1 to 40-4 have protection units 42-1 to 42-4, respectively). The protection board 40-1 is connected to the second communication line CL3, and the protection board 40-2 is connected to the second communication line CL4. The protection board 40-3 is connected to the second communication line CL3, and the protection board 40-4 is connected to the second communication line CL4. Details of the inside of the protection unit 42 will be described later. The protection unit 42 may be referred to as a protection unit (new) 42 .

The second communication lines CL3 and CL4 (second network) are sometimes called process buses, for example. The second communication lines CL3 and CL4 are communication lines that form a LAN (Local Area Network) in a predetermined area such as an electrical station.

Here, for example, the first communication protocol for the first communication lines CL1 and CL2 is different from the second communication protocol for the second communication lines CL3 and CL4. For example, the communication protocol of the first communication lines CL1 and CL2 is the station bus communication protocol applied to the IEC 61850 standard, and the communication protocol of the second communication lines CL3 and CL4 is applied to the IEC 61850 standard. It is the communication protocol of the process bus. The communication protocol of the first communication lines CL1 and CL2 and the communication protocol of the second communication lines CL3 and CL4 are not limited to the above communication protocol, and may be other communication protocols. and the communication protocol of the second communication lines CL3 and CL4 may be the same.

The protection board 40 is a protection relay device that controls circuit breakers provided at each of a plurality of locations in a transmission line provided in an electric power system. When an accident such as a short circuit or ground fault occurs in the electric power system, the protection board 40 removes the accident and prevents the accident from spreading by disconnecting the circuit breaker and disconnecting the power equipment or system in which the accident occurred. Suppression to ensure sound operation of the power system.

The protection board 40 acquires power information on the power supplied to the section of the transmission line to be protected. The protection board 40 generates operation information regarding the operation of the circuit breaker and controls the circuit breaker based on the generated operation information. The protection board 40 transmits power information and operation information to the BCU 32, the ITC 12, and the like.

[Process level]
At the process level, PIU 50 (50-1 to 50-4), PIU 50-1 and PIU 50-3 are connected to, for example, second communication line CL3, and PIU 50-2 and PIU 50-4 are connected to, for example, second communication line CL3. It is connected to the communication line CL4. Hereinafter, PIUs 50-1 to 50-4 may be referred to as PIUs 50 when they are not distinguished from each other. The PIU 50 is an example of an "interface device (for example, communicating with power equipment such as a voltage transformer, transformer, switchgear, etc.)".

The PIU 50 acquires information indicating the status of the equipment and information about equipment failures. The PIU 50 is connected to, for example, a transformer connected to a transmission line, a meter, and a circuit breaker via a metal cable. The PIU 50 acquires the status of the transformer, the information acquired by the meter, the status of the circuit breaker, and the like, and transmits the acquired information to the protection board 40 or the control board 30 . The PIU 50 converts an analog signal from an instrument or the like transmitted via a metal cable into a digital signal and transmits the converted digital signal to the protection unit 42 .

It should be noted that the local electrical station system 1 communicates with the counterpart electrical station system provided at the counterpart electrical station. For example, the protection panel of the other end electrical station system includes an electrical station IFU (Inter Face unit), a protection unit, a PIU, etc. It is connected to the protection unit 42 by a dedicated communication line.

[About processing to update from the current]
Here, a system suitable for a communication environment (station bus, process bus) to which IEC 61850 is applied has been commercialized as a power station system for a digital power station. In the configuration using the above communication environment, the devices or devices arranged at the bay level and the devices or devices arranged at the station level and process level are connected in a communication environment applicable to IEC 61850 within the premises of the power station. be.

In the existing (current) electrical station, the communication between the above levels (for example, communication with the protection panel) may be connected with metal cables. In addition, the operation start time (period) of the protection panel and control panel of the existing power station system may differ, and since these are not updated all at once, each panel are planned to be updated, and will be updated sequentially. Because of this situation, when an existing electrical station system is updated to a system using a communication environment that applies IEC 61850, the following problems occur (see FIGS. 2 to 4).

A case of updating current equipment to equipment using the first communication lines CL1, CL2 and the second communication lines CL3, CL4 shown in FIG. 1 will be described with reference to FIGS. 2 to 4. FIG. First, the update using the protection unit (current) will be described.

FIG. 2 is a diagram showing an example of a configuration including a protection unit (current) 42X mounted on the protection board 40. FIG. The protection board 40 and the control board 30 are connected via a metal cable. In addition, the protection unit (current) 42X mounted on the protection board 40 is connected to an overhead terminal block for connection with a metal cable arranged on the protection board 40 by wiring inside the board. Devices provided at the process level (for example, meters, transformers, and gas-insulated switchgear 54) are connected by metal cables and in-panel wiring. The gas-insulated switchgear 54 is a sealed metal container filled with sulfur hexafluoride (SF6) gas, which has high insulating properties, and contains switchgear attached to electrical stations such as circuit breakers, disconnectors, and grounding switches. Equipment. The BCU 32 and the ITC 12 mounted on the control panel 30 are connected via a communication line A. A communication line A is a communication line for performing communication based on a predetermined communication protocol used in existing equipment.

The protection unit (current) 42X is composed of various modules or substrates, for example, a CPU (Central Processing Unit) 43, AIC (Analog Input Converter) 44, and DIO (Digital Input Output) 45. The CPU 43, AIC 44, and DIO 45 are connected via a communication line B. A communication line B is a communication line for performing communication based on a predetermined communication protocol used in the protection unit (current) 42X.

The CPU 43 executes programs stored in the storage device to perform various processes. The various types of processing are, for example, processing executed by the protection unit 42 as described above, such as processing for removing an accident by disconnecting the power equipment or system in which the accident occurred by shutting off the circuit breaker. The AIC 44 converts an analog signal, which is transmitted from a process-level device or device via a metal cable, into a digital signal. The DIO 45 is a communication interface for communicating with peripheral devices and devices. The DIO 45 is, for example, a communication interface for communicating with the control panel 30 or devices and devices provided at the process level via metal cables.

FIG. 3 shows the configuration after the ITC 12 and the control panel 30 and the BCU 32 mounted on the current system of FIG. 2 are updated to the first communication line (station bus). AIC 33 and DIO 34 are mounted in the control panel 30 in preparation for the second communication line (process bus). On the other hand, the protection unit (current) 42X mounted on the protection board 40 and the BCU 32 mounted on the control board 30 are connected by the first communication line CL2. The metal cable connecting the protection unit (current) 42X mounted on the protection board 40 and the control board 30 is removed, and the CPU 43 is connected to the first communication line CL2. As a result, the CPU 43 mounted on the protection unit (current) 42X and the ITC 12 are connected via the first communication line CL2. When connecting the CPU 43 to the first communication line CL2 as described above, it is necessary to modify the hardware and update the software of the protection board 40 and the protection unit (current) 42X corresponding to the updated system.

At the time of the above update, in the protection unit (current) 42X, the DIO 45 that was mounted because it was connected to the control panel 30 with a metal cable may be removed, and in the control panel 30, the AIC 33 and the DIO 34 that communicate with the BCU 32 may be removed. and may be added. The functions of AIC 33 and AIC 44 are the same, and the functions of DIO 45 and DIO 34 are the same.

FIG. 4 is a diagram for explaining the process of connecting the protection unit (current) 42X mounted on the protection board 40 and the process-level devices and devices through the second communication line CL3 following the above update. Remove the metal cable connecting the protection unit (current) 42X and the process-level devices and devices, and connect the CPU 43 to the second communication line CL3. Furthermore, the PIU 50 is provided at the process level (for example, when the PIU 50 is provided at the timing when the GIS 54 is updated), the connection between the AIC 33 and the DIO 34 mounted on the CPU 43 and the control panel 30 is removed via the second communication line CL3, and the CPU The built-in BCU 32 and PIU 50 are connected. Thereby, the CPU 43 and the PIU 50 are connected via the second communication line CL3. When connecting the CPU 43 to the second communication line CL3 as described above, it is necessary to modify the hardware and update the software of the protection board 40 and the protection unit (current) 42X corresponding to the updated system.

As described above, if the equipment is updated using the protection unit (current) 42X, it will be necessary to modify the hardware of the current protection panel 40 and protection unit (current) 42X, update the software, etc. It may take a load to shift to the system. For example, costs may increase due to various on-site modifications and prolonged testing. Therefore, in this embodiment, as described in FIGS. 5 to 7, the protection board 40 mounted with the protection unit (new) from the protection unit (current) is arranged in advance, or the protection unit is updated to the protection unit (new). It is desirable to keep

[Method for updating equipment in this embodiment]
FIG. 5 is a diagram showing an example of a configuration in which a protection unit (new) 42 is installed. The protection unit (new) 42 and the control panel 30 are connected via a metal cable. The protection unit (new) 42 and devices provided at the process level (for example, meters, transformers, gas insulated switchgear 54, etc.) are connected via metal cables.

A protection unit (new) 42 mounted on the protection board 40 includes, for example, a CPU (arithmetic processing unit) 43, an AIC (AD conversion unit) 44, and a DIO (input/output unit) 45. The CPU 43, AIC 44, and DIO 45 are connected via a second communication line. The CPU 43 and DIO 45 are connected via a first communication line. In the protection unit (new) 42, the CPU, AIC 44, and DIO 45 are configured to be internally divisible (physically divisible). The CPU 43 is an example of a “calculation processing unit that performs protection control processing for power equipment (power equipment such as transmission lines)”, and the DIO 45 is an input/output of signals with “power equipment (other devices, switches, etc.”) is an example of an input/output unit for performing

FIG. 6 shows the configuration after the ITC 12 and the control panel 30 and the BCU 32 mounted on the current system of FIG. 5 are updated to the first communication line (station bus). AIC 33 and DIO 34 are mounted in the control panel 30 in preparation for the second communication line (process bus). A protection unit (new) 42 mounted on the protection board 40 and the control board 30 are connected by a first communication line CL2. The metal cable connecting the protection unit (new) 42 and the control panel 30 is removed, and the ITC 12, BCU 32, and protection unit (new) 42 are connected to the first communication line CL2. Thereby, the ITC 12, the BCU 32 and the CPU 43 are connected via the first communication line CL2. In this case, since the protection unit (new) 42 already has the function of being able to connect to the first communication line, it is not necessary to modify the hardware or update the software of the protection unit (new) 42, for example.

At the time of the above update, the DIO 45 may be removed from the protection unit (new) 42, or may be placed in the protection unit (new) 42 as a spare for mounting. For example, the DIO 45 may be left unremoved when communicating with process level equipment, devices, etc. via metal cables.

FIG. 7 is a diagram for explaining the process of connecting the protection unit (new) 42 mounted on the protection board 40 and the process-level devices and devices through the second communication line CL3 following the update described above. The metal cable connecting the protection unit (new) 42 and process-level equipment or devices is removed, and the protection unit (new) 42 is connected to the second communication line CL3. Furthermore, a PIU 50 is provided at the process level, and the AIC 33 and DIO 34 mounted on the CPU 43 and the control panel 30 are removed from the connection via the second communication line CL3 and connected to the BCU 32 incorporated in the CPU. Thereby, the CPU 43 and the PIU 50 are connected via the second communication line CL3. In this case, for example, there is no need to modify the hardware of the protection board 40 or the protection unit (new) 42 and update the software. In addition, the PIU 50 converts an analog signal acquired from a process-level device or device into a digital signal and outputs it to the protection unit (new) 42 via the second communication line CL3, so that the protection unit (new) 42 acquires the digital signal.

At the time of the above update, the AIU 44 may be removed from the protection unit (new) 42, or may be placed in the protection unit (new) 42 as a spare for installation.

As described above, if the protection board 40 is arranged in the protection unit (new) 42 in advance instead of the current unit of the protection unit (current) 42X, the protection unit (new) 42 can be connected to the first communication line CL1 and the second communication line CL1. By connecting to two communication lines CL3, it is possible to easily update the system while suppressing burdensome modification of hardware and update of software.

[Modification]
FIG. 8 is a diagram showing an example of a configuration of a modification of the electric station system 1. As shown in FIG. A modification of the electric station system 1 can be constructed using the protection unit (new) 42A as the PIU 50 as well. The protection unit (new) 42A includes a CPU 43A, an AIC 44A, and a DIO 45A that convert analog signals into digital signals and perform arithmetic processing for communication lines (for example, arithmetic processing for transmitting the above-described digital signals to the communication lines). The CPU 43A needs arithmetic processing as the PIU 50, and even though the CPU hardware is the same, the software is not the software used in the protection unit (new) 42A, but the software of the PIU 50. AIC 44A has the same functional configuration (or similar functional configuration) as AIC 44, and DIO 45A has the same functional configuration (or similar functional configuration) as DIO 45.

As described above, the modification of the electric station system 1 has a functional configuration equivalent to that of the electric station system 1 by arranging the protection unit (new) 42A instead of the PIU 50. In addition, by arranging the protection unit (current) 42X of the other end electrical station in the configuration of the protection unit (new) 42, the protection unit (new) 42 has each function, so it is possible to network the power station premises in the future ( Since the first communication line (station bus) and the second communication line (process bus) are provided, the IFU or PIU corresponding to these networking can be made unnecessary in the protection panel 40 of the counterpart electrical station. In addition, by freely selecting the necessary components and incorporating them into the unit, it is possible to build an appropriate system with no wasted components, while the units are common.

[flowchart]
FIG. 9 is a flow chart relating to equipment update when the power station system 1 is updated. The following processing is performed by, for example, an administrator or a robot. First, for example, the administrator installs the protection board 40 of the protection unit (new) 42 instead of the protection unit (current) 42X (step S100). Next, the administrator connects the protection unit (new) 42 to the first communication line CL2 (step S102). Thereby, the protection unit (new) 42 and the control panel 30 corresponding to the first communication line and the second communication line in advance are connected via the first communication line CL2.

Next, the administrator installs the PIU 50 and connects the PIU to the second communication line CL3 (step S104). Next, the administrator connects the protection unit (new) 42 to the second communication line CL3 (step S102). The protection unit (new) 42 and the PIU 50 are connected via the second communication line CL3. This completes the processing of this flowchart. With this process, for example, it is possible to flexibly update the equipment even in the transitional period of updating the equipment to the protection unit (new) 42A.

According to the embodiment described above, the protection unit (current) 42X mounted on the existing protection board 40 is pre-mounted in the protection unit (new) 42 or replaced in advance to realize a more appropriate communication environment. can support that. Furthermore, by connecting the protection unit (new) 42 to the first communication line and the second communication line, and connecting the protection unit (new) 42 to the PIU 50, the facility can be easily updated to suit the desired communication environment. It is possible to realize a more appropriate communication environment.

Although several embodiments of the invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

Claims

An AD conversion unit that converts an input analog signal into a digital signal, an arithmetic processing unit that performs protection control processing for power equipment, and an input/output unit that inputs/outputs signals to/from power equipment can be divided internally. A relay unit configured in
At least the arithmetic processing unit and one or both of the AD conversion unit and the input/output unit use both a first network and a second network applied to the electric station premises outside the relay unit. communicate with
relay unit.
a communication protocol different from the first communication protocol of the first network and the second communication protocol of the second network;
A relay unit according to claim 1.
The first network is a network connected to a device or device provided at a station level, which is a higher-level device of the relay unit,
The second network is a network connected to a device or device provided at a process level that is a subordinate device of the relay unit,
A relay unit according to claim 1 or 2.
The device or equipment provided at the station level includes a relay device that relays communication with devices outside the power station premises,
The device or equipment provided at the process level includes an interface device that communicates with power equipment such as voltage transformers, transformers, switches, etc.
A relay unit according to claim 3.
the first communication protocol of the first network is a station bus communication protocol adopted in a communication standard;
The second communication protocol of the first network is a communication protocol of a process bus adopted in communication standards,
A relay unit according to any one of claims 1 to 4.
a relay unit according to any one of claims 1 to 5;
a relay device communicably connected to the relay unit via the first network;
an interface device that is communicatively connected to the relay unit via the second network and communicates with electric power equipment such as an instrument transformer, a transformer, and a switch;
electrical station system.
In place of the interface device, an AD conversion unit that converts an input analog signal into a digital signal, an arithmetic processing unit that performs protection control processing for power equipment, and an input/output for inputting and outputting signals with power equipment A process-level relay unit configured to be internally divisible and comprising at least the input/output unit,
the process level relay unit is communicatively connected to the relay unit via the second network;
The electric station system according to claim 6.
A first AD conversion unit that converts an input analog signal into a digital signal, a first arithmetic processing unit that performs protection control processing for power equipment, and a first input/output unit that inputs and outputs signals to and from the power equipment. a first relay unit configured to be internally divisible;
a second AD conversion unit that converts an input analog signal into a digital signal; a second arithmetic processing unit that performs arithmetic processing different from that of the first arithmetic processing unit and performs arithmetic processing as a second relay unit; a second relay unit configured to be internally divisible with a second input/output unit for inputting and outputting signals from the
The first relay unit includes at least the first arithmetic processing unit,
The first arithmetic processing unit is capable of communicating with a device connected to the first network by using the first network applied to the premises of the electric station,
The first arithmetic processing unit is capable of communicating with the second relay unit connected to the second network by using the second network applied to the premises of the electric station,
The second input/output unit of the second relay unit is connectable to power equipment different from the first relay unit via a communication line,
electric station system.
An AD conversion unit that converts an input analog signal into a digital signal, an arithmetic processing unit that performs protection control processing for power equipment, and an input/output unit that inputs/outputs signals to/from power equipment can be divided internally. In a relay unit configured as
At least the arithmetic processing unit and one or both of the AD conversion unit and the input/output unit use both a first network and a second network applied to the electric station premises outside the relay unit. communicate with
a first connecting step of connecting the relay unit to the first network;
an installation step of providing an interface device that connects to the power equipment;
a second connection step of connecting the interface device and the relay unit via the second network;
A method for updating an electrical station system comprising:
Signal input/output between current AD conversion unit connected to power equipment via cable and converting input analog signal to digital signal, current arithmetic processing unit performing protection processing for power equipment, and power equipment and a current input/output unit for performing the above-mentioned respective elements are connected by a predetermined communication line, is replaced with the relay unit, and in the relay unit, the first connection step, the performing the installation step and the second connecting step;
The update method of the electric station system according to claim 9.