KR100695021B1 - Substation system of iec 61850 base using xml trip logic - Google Patents

Abstract

A transformer substation system based on IEC 61850 using an XML(Extensible Markup Language) trip logic is provided to easily check trip logic information of an IED(Intelligent Electric Device) through a standard service by using data extension of IEC 61850 standard regulation. A CID(j) file has information for controlling a breaker(500). An IED(100) receives a voltage signal and a current signal. An engineer PC(200) transmits a trip logic file(m) having reference information for determining whether amplitudes of a current and a voltage are in a normal state through an ethernet switch(400). A CID file analyzing unit(110) analyzes a CID file transmitted through the ethernet switch(400) from the engineer PC(200). A breaker control unit(120) sets a reference value for the current and voltage by CID file information which is analyzed in the CID file analyzing unit(110). The breaker control unit(120) transmits a control signal, which controls the breaker(500) by detecting an abnormal current and a voltage of the breaker(500) based on the reference value, to the breaker(500). A trip logic file analyzing unit(160) analyzes a trip logic file as reference value information for the current and voltage transmitted from the engineering PC(200). A TRLC setting unit(170) sets a logical node value of a TRLC(180) based on the trip logic file information analyzed in the trip logic file analyzing unit(160). The TRLC(180) stores a detection and processed value of the abnormal current and voltage transmitted by the breaker control unit(120) through a logic node which is set by the TRLC setting unit(170). A breaking signal providing unit(190) transmits a trip signal as a breaking signal to the breaker control unit(120) by recognizing the abnormal current and voltage transmitted from the breaker control unit(120) through the TRLC(180).

Description

Substation System of IEC 61850 Base Using XML Trip logic}

1 is an overall configuration diagram showing an embodiment of a conventional substation system.

2 is a configuration diagram of a substation system of the Ethernet type presented in IEC 61850.

3 is a configuration diagram of a system configuration program of a substation.

4 is a remote control configuration diagram of an IED trip logic of the present invention.

<Description of Symbols for Major Parts of Drawings>

100: IED 110: CID file analysis unit

120: breaker control unit 160: trip logic file analysis unit

170: TRLC setting unit 180: TRLC

190: blocking signal provider 200: engineering PC

300: Local PC 400: Ethernet Switch

500: breaker

The present invention relates to a substation system based on IEC 61850.

In order to protect and control the transformer connected to the power system recently, the equipment is standardized internationally by enabling the compact use of IT equipment based on IT technology, autonomous automation, digitalization of data, and effective use of data through the use of networks. The development of the technology of the old substation system is actively progressing.

Substations are installed in the power transmission system or distribution system of the power system in order to step up or step down the output of the generator or to step down the voltage of the system. In addition to transformers for boosting or stepping down voltages, substations are provided with devices for concentrating and distributing electric power, devices for controlling current, or devices for protecting and controlling devices in systems or substations.

For example, a circuit breaker used in a gas insulated switchgear (GIS) is provided with a gas pressure sensor for detecting gas pressure, an acceleration sensor for detecting a signal according to an abnormality, a current and voltage detector, and a sensor for detecting a transformer state. Thermometers, pressure gauges, oil level sensors, current detectors, and the like are provided.

These sensors are connected to a protective device, a measuring device, a control device and a device monitoring device via a cable for transmitting an electrical signal. The protection device, the measurement device, the control device and the device monitoring device are each connected to the upper level substation monitoring and control device via a cable for transmitting an electrical signal.

In the substation monitoring and control device, the state of the circuit breaker or transformer is monitored based on the information obtained from various sensors, the monitoring result is displayed on the screen, and an operation command is output to the circuit breaker. In other words, while monitoring the state of the substation at a remote location, a breaker or the like is remotely operated.

In the prior art of the present invention, Figure 1 is a "substation system" Publication No. 2003-065365, which is an overall configuration showing an embodiment of a conventional substation system. In FIG. 1, a substation 1 connected to a power transmission system or a distribution system among power systems is provided with a transformer 1 such as a transformer, a circuit breaker, a disconnector (not shown) as a monitoring and control object. In the vicinity of the transformer 1, a local cubicle 2 is provided.

The transformer 1 includes a state detector 11 for detecting a state of a monitoring target (breaker, transformer, etc.), a controller 12 for controlling a control target (breaker, etc.) according to control information, and a state detector 13. It is composed.

The state detector 11, for example, is installed in a gas insulated switchgear (GIS), and receives a wound type PCT (Potential Current Transformer) sensor as a sensor for measuring the voltage and current of the system, and an electric signal by detecting the PCT sensor. It is comprised with the all-optical converter which converts into a signal, and the all-optical converter is connected to the optical serial process bus 17. As shown in FIG.

The controller 12 is installed in the GIS to control the GIS according to an optical / electric converter for converting an optical signal from the optical serial process bus 17 into an electrical signal and a protection command or an operation command by the output of the optical / electric converter. An actuator or trip coil is provided.

The state detector 13 is installed in a GIS, a transformer, or the like, and is a device monitoring sensor for diagnosing various devices, including a gas pressure sensor for detecting gas pressure in a GIS, a temperature sensor for detecting temperature in a transformer, and a pressure of nitrogen gas in a transformer. It is equipped with sensors such as pressure sensor for detecting oil level, oil level sensor for detecting oil level in transformer, current sensor for detecting current in transformer, and converting electric signal by output of each sensor into optical signal. It consists of an optical transducer.

The all-optical converter is connected to the optical serial process bus 18. Examples of the device monitoring sensor include a humidity sensor for detecting humidity in the switchgear SWGR, an acoustic sensor for detecting vibration, an insulation degradation sensor for detecting insulation degradation, and a sensor for detecting abnormal heating of the device. have.

On the other hand, in the local cubicle (2), the web server terminal card (21, 25), protection card (23), measurement card (24), control card (22), device monitoring card (27), mobile terminal card (26) Are integrated and housed together with the optical serial process buses 20 and 18, and the web server terminal cards 21 and 25 are connected to the time server 3, respectively, and the substation monitoring via the serial bus 4 is carried out. It is connected to the control apparatus 5.

The protection card 23 is configured as a protection device that performs a calculation to protect a control object based on the information from the state detector 11 and outputs a protection command as control information. The measurement card 24 is a state to be monitored on the basis of the information from the state detector 11, for example, measures the voltage and current of the system or the voltage and current of the GIS, and measures the measurement result of the web server terminal card 21. It is configured as a measuring instrument which outputs to The control card 22 performs an operation for controlling the control object based on the information from the status detector 11 and the information from the substation monitoring and control device 5, so as to control operation commands, trip commands, and the like as the control information. It is configured as a controller outputting to 12). The device monitoring card 27 is configured as a device monitoring device which determines the presence or absence of an abnormality of a monitoring target based on the information from the state detector 13 and outputs the determination result to the web server terminal card 25. The mobile terminal card 26 is configured as a device that performs arithmetic operations for carrying information with the mobile terminal.

That is, the measurement card 24 and the device monitoring card 27 receive information via the state detectors 11 and 13 and the optical serial process buses 20 and 18 (with an optical signal as a medium), And a protection card 23 and a control card 22 generate control information for controlling the controller 12, and generate control information and serial information. It is configured as a control information generating device for converting the control information input from the bus 4 into an optical signal and transmitting it to the controller 12. The monitoring information generating device and the control information generating device are integrated and stored in the local cubicle 2. It is.

The web server terminal cards 21 and 25 are, for example, based on HTML (Hypertext Markup Language), the protection card 23, the measurement card 24, the control card 22, the device monitoring card 27 and information. At the same time, the information from each card is transmitted to the substation monitoring and control device 5 through the serial bus 4 as digital serial data, and the serial data from the substation monitoring and control device 5 is transferred. It is configured to receive via the serial bus 4 and distribute the received data to each card.

The web server terminal cards 21 and 25 receive time information from the time server 3, distribute information about the received time to each card, and synchronize time between the cards. . That is, the time server 3 receives a GPS (Global Positioning System) signal transmitted from the satellite 10 to the antenna 9, and the web server terminal cards 21 and 25 receive information on the time included in the GPS signal. It is configured to send to.

The serial bus 4 constituting the signal transmission path is configured as a local area network (LAN) in a substation premises, and the serial data transmitting the serial bus 4 is an internationally standardized protocol (communication standard), for example, international It is intended to be produced in accordance with the protocols IEC 61850, 61375, as specified by the IEC. The protection card 23, the measurement card 24, the control card 18, and the device monitoring card 27 are connected to the serial bus 4 via the web server terminal circuits 21 and 25, thereby connecting one serial bus. It is connected to the substation supervisory control apparatus 5 in the state (4) shared by each card.

The substation monitoring and control device 5 is a device which collects information on the state of the monitoring object and outputs control information for controlling the control object, for example, an operation command and a trip command. The personal computers 15 and 16 are connected to the serial bus 4 and connected to the Internet 6 as a communication network via the interface 14. On the screens of the personal computers 15 and 16, an image relating to the state of each monitoring target is displayed, and various operation commands and the like based on the operation of the operator are output from the personal computers 15 and 16 as control information. It is. It is also possible to use an intranet or a public line as a communication line instead of the Internet 6.

A maintenance management device 7 is connected to the Internet 6 as a maintenance base of a power company, and a maintenance management device 8 is connected as a maintenance base of a manufacturer that manufactures each device of a substation.

The maintenance management apparatuses 7 and 8 transmit and receive information with the substation monitoring control apparatus 5 via the Internet 6 by the operation of the maintenance staff, and based on the information from the monitoring control apparatus 5, In addition to monitoring abnormalities in the monitoring target, trend management and history management related to the monitoring target can be performed remotely.

In this case, each maintenance management device (7, 8) establishes a database for introducing necessary data via the Internet (6), and executes various analyzes based on the data stored in the database, By performing the relevant diagnostics, it is possible to confirm abnormal precursors or to respond promptly when an abnormality occurs.

Based on the analysis results and the diagnosis results, it is possible to realize the efficiency of maintenance operation and maintain the reliability at the same time by devising a preventive maintenance plan for maintenance of reliability, inspection history, and parts management.

In the prior art, since signal transmission through a serial bus uses an internationally standardized protocol as serial data, disputes between different manufacturers can be standardized.

However, in reality, no triplogic technology has been developed to comply with the standardization, and therefore, the development of a substation system according to an internationally standardized protocol is required.

An object of the present invention is to provide a substation system suitable for IEC 61850 based IED. In particular, the present invention provides a substation system having a logic node (TRLC) using an XML file for the internal trip logic of the IEC 61850 based IED.

In addition, another object of the present invention is to provide a substation system capable of detecting and measuring the power flowing to the breaker to block the breaker when detecting the abnormal power supply to protect the equipment of the substation.

In order to realize the object of the present invention, the present invention proposes a substation system suitable for IEC 61850 based IED.

First, in order to understand the configuration of the present invention, terms are defined as follows.

1) IEC61850: One of the international standards for substation automation defined in IEC TC57 WG1 (Power system IED communication and associated data models).

2) Logical Node (LN): Data model for substation automation function defined in IEC 61850 standard.

3) IED (Intelligent Electric Device): An intelligent electronic device with a protective relay element.

4) Protection relay (breaker): CB, LTC, Relay, etc. to protect the power equipment from accidents (abnormal conditions) of the power system.

5) Trip Logic File: Logic file that is configured to consider various protection factors when trip signal occurs.

6) Extensible Markup Language (XML): A tag-based language that defines tags and defines the elements and structures of the data.

7) SCL (Substation` configuration language): Substation system configuration language in XML format as defined in IEC 61850.

8) Parser: It is a kind of parser that extracts the syntax listed in the input data by defined meaning. Extracts the logic and data reference names from the XML file.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

2 is a configuration diagram of an Ethernet type substation system proposed in IEC 61850, FIG. 3 is a configuration diagram of a system configuration program of a substation, and FIG. 4 is a remote control configuration diagram of an IED trip logic of the present invention.

FIG. 2 is an embodiment of an IEC 61850 based substation, in which data transmission uses Ethernet Ring with Switches, and setting of each protection facility is required. The setting is defined in IEC 61850-6.

The regulation prescribes the format of files that describe the configuration of intelligent electronic devices (IEDs), IED parameters, communication system configurations, assignments of interception functions, and the relationships between them. The language used here is SCL. The IED and SCL communication systems follow the requirements of IEC 61850-5 and IEC 61850-7-x, and the SCL is based on XML version 1.0.

As shown in FIG. 2, it is an example of an IEC 61850 based substation automation system. The substation system was divided into stations, bays, and processes. The process level is provided with a measuring device (e) for measuring the voltage and current of the power system and a breaker device (f) for controlling the control object according to the control information.

At the bay level, an IED (d), which is a device that acquires various information from process level equipment and protects the power system, is installed. The station level acquires information from the bay level IED and is provided with devices (a) for monitoring and controlling the substation system. Since IEC 61850 is basically an Ethernet-based communication protocol, each level is connected through an Ethernet Ring with Switches (c).

FIG. 3 is an embodiment of the IEC 61850 based substation of FIG. 2. Referring to FIG. 3, FIG. 3 shows a process of setting a system configuration program of a substation.

Figure 3 shows an example of a substation system configuration and configuration method of the IEC 61850 standard. The standard defines the information necessary for the configuration and configuration of the substation system as an XML-based file called SCL (Substation Communication Language).

This SCL file is used as the input file of the configuration program in the substation engineering process. There are four types of files: SSD (g), ICD (h), SCD (i), and CID (j). The configuration programs include system configuration program (k) and IED configuration program (l). The system configuration program (k) is a program for configuring and setting the entire substation. The input file includes SSD (g) files that contain information about the unit's disconnection diagram and necessary functions, and each IED (d) installed in the substation system. There is an ICD (h) file that contains information such as the information and functions it provides. The ICD (h) file is provided by the manufacturer of the IED (d). The system configuration program (k) uses this input file to configure and set up the entire substation system.

Through this process, the SCD (i) file containing the configuration and setting information of the entire substation system is outputted. The SCD (i) file is used as the input file for the IED configuration program (i). The IED configuration program 1 has a function of extracting only information necessary for the corresponding IED (d) from the SCD (i) file. The SCD (i) file classifies only the information necessary for each IED (d) through the IED configuration program l to make a CID (j) file. This CID (j) file allows each IED to correctly perform the functions it should perform in the entire substation system.

Figure 4 is a remote control configuration of the IED trip logic of the present invention.

As shown in Figure 4, the present invention is configured as follows.

An engineering PC 200 is provided, in which the IED 100 receives the voltage signal and the current signal from the engineering PC 200, and the CID (j) file having information for controlling the circuit breaker 500, and the current at the substation. And a trip logic file m having information serving as a criterion for determining whether the voltage is normal and transmitted to the IED 100.

Here, the IED 100 of the present invention is a CID file analysis unit 110 for analyzing the CID (j) file transmitted from the engineering PC 200, and the CID (j) file analyzed by the CID file analysis unit 110 A circuit breaker controller which sets reference values for current and voltage based on the information, and detects abnormal current and abnormal voltage of the circuit breaker 500 and transmits a control signal for controlling the circuit breaker 500 to the circuit breaker 500. 120, a trip logic file analysis unit (XML Paser) 160 for analyzing a trip logic file (m) which is reference value information on current and voltage transmitted from the engineering PC 200, and a trip logic file analysis unit 160 TRLC setting unit 170 for setting the logical node value of the TRLC (180) based on the information of the trip logic file (m) interpreted in the) and the circuit breaker control unit through the logical node set in the TRLC setting unit 170 TRLC (180) for storing the result of the detection and processing of the abnormal current and the abnormal voltage transmitted from the (120), Recognition of abnormal current and voltage transmitted from the breaker control unit 120 through the TRLC (180) a blocking signal providing unit for transmitting a trip signal to the breaker control unit 120, which is a blocking signal to block the breaker 500 And 190.

Here, the circuit breaker controller 120 is set a reference current value for blocking the circuit breaker 500 based on the CID (j) file analyzed by the CID file analysis unit 110, the circuit breaker (based on the set reference current value) Circuit breaker 500 based on the current monitoring unit 130 and the CID (j) file interpreted by the CID file analysis unit 110 and transmits to the TRLC 180 when an abnormal current occurs in real time by monitoring the current flowing in real time And a voltage monitoring unit 140 for setting a reference voltage value for blocking) and monitoring in real time to monitor the voltage flowing through the breaker 500 based on the set reference voltage value and transmitting the abnormal voltage to the TRLC 180 when an abnormal voltage is generated. When a value different from the reference value for the current and voltage monitored by the current monitoring unit 130 and the voltage monitoring unit 140 is generated, a trip signal, which is a blocking signal, is blocked to the breaker 500 to block the breaker 500. It comprises a trip signal transmission unit 150 for transmitting.

On the other hand, using the local PC 300 that is portable to the trip logic file analysis unit 160 may modify the trip logic file (m), which is the reference value information for the current and voltage directly in the field.

The present invention configured as described above operates as follows.

In order to set up the initial substation system, the engineering PC 200 transmits the CID (j) file, which is an IED configuration file, to each IED 100 through a network. The delivered CID (j) file is transmitted to the IED 100 via the Ethernet switch 400. Information of the transmitted CID (j) file is interpreted through the CID file analysis unit 110. The interpreted information sets the values of the current monitoring unit 130 and the voltage monitoring unit 140 of the circuit breaker control unit 120.

In the present invention, in this process, the trip logic file transmitted through the Ethernet switch 400 is interpreted through the trip logic file analysis unit 160. The trip logic file may be transmitted from the engineering PC 200 to the IED 100 via a network and may be transmitted anywhere on the network via the local PC 300.

The transmitted trip logic file 110 is interpreted by the trip logic file analysis unit 160 and sets the information interpreted by the TRLC setting unit 170 to the TRLC 180. The service corresponding to the information set in the TRLC 180 is provided by the blocking signal controller 190. The blocking signal controller 190 blocks the breaker 500 by transmitting the final trip result of the IED 100 through a network.

That is, when the trip logic file m is transmitted from the engineering PC 200 or the local PC 300 to the trip logic file analysis unit 160 provided in the IED 100, the trip logic file analysis unit 160 is transmitted. The trip logic file m is analyzed, and the TRLC setting unit 170 sets the logical node value of the TRLC 180 based on the analyzed trip logic file m.

In this case, the TRLC 180 having the logical node value set compares the abnormal current and the voltage sensed by the current monitoring unit 130 and the voltage monitoring unit 140 to provide the dangerous current and voltage detection result to the TRLC 180. When the cutoff signal controller 190 sees the change in the set information of the TRLC 180 and transmits the cutoff signal of the breaker 190 to the trip signal transmitter 150, the trip signal transmitter 150 is transmitted through the Ethernet switch 400. The breaker 500 will be blocked.

Although the preferred embodiments of the present invention have been described in detail above, those of ordinary skill in the art to which the present invention pertains may implement the present invention by various modifications or design changes without departing from the scope of the claims. In case it is regarded as the scope of the present invention.

In the present invention, since the TripLogic file is XML-based, the user can easily check and change the structure of TripLogic through any Text-Editor.

In addition, since the data structure of TRLC 160 with triplogic configuration information is created using the data extension method of the IEC 16850 standard, the user can easily check the triplogic information of the IED through the standard service. Since the IEC 61850 substation is based on an Ethernet network, triplogic can be easily set up via file transfer over long distances.

As described above, the present invention has the advantage of protecting the equipment of the substation by detecting and measuring power flowing in the breaker to cut off the breaker when detecting abnormal power.

Since the present invention is all made by using the substation environment requirements of the IEC 61850 substation system, it is possible to implement the cost logic service of the IED without additional hardware equipment.

Claims (3)

In the substation system based on IEC 61850, A CID (j) file having information that the IED 100 receives the voltage signal and the current signal to control the circuit breaker 500; An engineer PC (200) for transmitting a trip logic file (m) having information as a criterion for determining whether the magnitude of current and voltage is normal in the substation through the Ethernet switch 400; A CID file analysis unit 110 for analyzing the CID (j) file transmitted from the engineering PC 200 through the Ethernet switch 400; The reference value for the current and the voltage is set based on the information of the CID (j) file interpreted by the CID file analysis unit 110, and based on this, the abnormal current and the abnormal voltage of the circuit breaker 500 are sensed to break the circuit 500. Breaker control unit 120 for transmitting a control signal for controlling the breaker 500; A trip logic file analysis unit (160) for analyzing trip logic files (m) which are reference value information on current and voltage transmitted from the engineering PC (200); A TRLC setting unit 170 for setting a logical node value of the TRLC 180 based on the information of the trip logic file m analyzed by the trip logic file analysis unit 160; A TRLC 180 for storing a result value of sensing and processing an abnormal current and an abnormal voltage transmitted from the circuit breaker controller 120 through a logic node set by the TRLC setting unit 170; Recognition of abnormal current and voltage transmitted from the breaker control unit 120 through the TRLC (180) a blocking signal providing unit for transmitting a trip signal to the breaker control unit 120, which is a blocking signal to block the breaker 500 IEC 61850 based substation system using XML triplogic, characterized in that it comprises (190). According to claim 1, wherein the circuit breaker controller 120 is set a reference current value for blocking the circuit breaker 500 based on the CID (j) file analyzed by the CID file analysis unit 110, the set reference current A current monitoring unit 130 which monitors in real time to monitor the current flowing in the breaker 500 based on the value, and transmits the abnormal current to the TRLC 180 when an abnormal current occurs; The reference voltage value for blocking the circuit breaker 500 is set based on the CID (j) file analyzed by the CID file analysis unit 110, and the voltage flowing through the circuit breaker 500 is monitored based on the set reference voltage value. A voltage monitoring unit 140 which checks in real time to transmit to the TRLC 180 when an abnormal voltage is generated; When a value different from the reference values for the current and voltage monitored by the current monitoring unit 130 and the voltage monitoring unit 140 is generated, a trip signal, which is a blocking signal, is transmitted to the circuit breaker 500 to block the circuit breaker 500. IEC 61850 based substation system using an XML trip logic, characterized in that it comprises a trip signal transmission unit (150). The triplogic file (m), which is reference value information on current and voltage, can be modified through an Ethernet network in a substation using the local PC 300 that is portable to the triplogic file analysis unit 160. Substation system based on IEC 61850 using XML triplogic.

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