CN216564648U

CN216564648U - Intelligent substation inserts formula switch position status indication device promptly

Info

Publication number: CN216564648U
Application number: CN202123196886.6U
Authority: CN
Inventors: 李聪; 刘升鹏; 储海兵; 韩玲霞; 贾宁; 丁子桓
Original assignee: Jiangsu Ele Electric Co ltd
Current assignee: Jiangsu Ele Electric Co ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-05-17
Anticipated expiration: 2031-12-20

Abstract

Plug-in switch position state indicating device of intelligent substation. The plug-in switch position state indicating device for the intelligent transformer substation is high in integration level, excellent in performance and simple and convenient to use. The device comprises a power supply module, an RS232 serial port communication module, an Ethernet communication module, an MCU module, an FPGA message module and an indicator lamp driving module; the MCU is responsible for receiving appointed configuration information from the analysis tool from the serial port and transmitting the appointed configuration information to the FPGA from the inside, meanwhile, the FPGA acquires external optical fiber Ethernet information, analyzes the GOOSE message according to the configuration information, appoints required information (such as a switch position) and finally outputs the information to the position indicator lamp or switches on the relay. The utility model has the characteristics of high integration level, excellent performance, simple and convenient use and the like.

Description

Intelligent substation inserts formula switch position status indication device promptly

Technical Field

The utility model relates to an intelligent transformer substation, in particular to an instant-plugging switch position state indicating device of the intelligent transformer substation.

Background

At present, the real-time position of a circuit breaker cannot be seen on a protection and measurement and control device (screen) of a 220kV line and a main transformer interval of a 220kV intelligent station and a main transformer interval of a 110kV intelligent station which are put into operation in various places. The protection and measurement and control device adopts a 4U whole-layer case, the length of a front panel of the case is about 40cm, the width of the front panel of the case is about 15cm, and a plurality of common light emitting diodes and a liquid crystal display are mainly arranged. The power of the light-emitting diode is generally 50mW, the working current is 50mA, the light-emitting part is circular with the diameter of about 1cm, the light-emitting brightness is general, the light-emitting diode is used for short-distance observation, and the effective observation distance is about 2 m; the liquid crystal display is a white-background black-character display screen with a 320x240 lattice, the length is about 10cm, the width is about 50cm, the liquid crystal display is also used for close-distance observation, and the effective observation distance is about 0.5 m.

Meanwhile, the number of the light emitting diodes of the protection and measurement and control device is large, displayed information comprises a device running state, a protection state and the like, and information needing to be displayed by the liquid crystal display is diversified, so that the position of the circuit breaker cannot be clearly and visually displayed through the light emitting diodes and the liquid crystal display.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model provides the plug-in switch position state indicating device for the intelligent transformer substation, which has high integration level, excellent performance and simple and convenient use.

The technical scheme of the utility model is as follows: the intelligent substation plug-in switch position state indicating device comprises a power supply circuit, a serial port communication circuit, an Ethernet communication circuit, an MCU circuit, an FPGA message circuit and an indicator lamp driving circuit;

the power supply circuit provides power for the serial port communication circuit, the Ethernet communication circuit, the MCU circuit, the FPGA message circuit and the indicator lamp driving circuit;

the RS232 circuit is connected with the MCU circuit and converts an RS232 level and a TTL level;

the MCU circuit comprises an MCU chip circuit and a first crystal oscillator circuit and is connected with the RS232 circuit and the FPGA message circuit;

the Ethernet communication circuit converts an external fiber Ethernet LVPECL signal into an MII signal and is connected with the FPGA message circuit;

the FPGA message circuit is respectively connected with the MCU circuit, the Ethernet communication circuit and the indicator light driving circuit;

the indicator light driving circuit is connected with the FPGA message circuit.

The FPGA message circuit comprises an FPGA chip and a second crystal circuit which are electrically connected.

The indicator light driving circuit comprises a driving chip and a relay which are electrically connected.

Still include a plurality of LED lamp pearls that are responsible for showing the circuit breaker position.

The LED lamp beads are three and are red-green double-color LED lamp beads respectively.

The utility model comprises a power supply module, an RS232 serial port communication module, an Ethernet communication module, an MCU module, an FPGA message module and an indicator light driving module; the MCU is responsible for receiving appointed configuration information from the analysis tool from the serial port and transmitting the appointed configuration information to the FPGA from the inside, meanwhile, the FPGA acquires external optical fiber Ethernet information, analyzes the GOOSE message according to the configuration information, appoints required information (such as a switch position) and finally outputs the information to the position indicator lamp or switches on the relay. The utility model has the characteristics of high integration level, excellent performance, simple and convenient use and the like.

Drawings

FIG. 1 is a hardware circuit block diagram of the present invention;

FIG. 2 is a software block diagram of the present invention;

fig. 3 is a flow chart of GOOSE information parsing.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The present invention is illustrated in FIGS. 1-3; an intelligent substation plug-in switch position state indicating device is shown in fig. 1 and comprises a power supply circuit, an RS232 serial port communication circuit, a hundred mega fiber Ethernet communication circuit, an MCU circuit, an FPGA message circuit and an indicator light driving circuit;

the input of the power supply circuit is a DC220V power supply, the output of the power supply circuit is DC5V, DC3.3V, DC1.8V and DC1.2V, and the power supply circuit supplies power to the RS232 serial port communication circuit, the Ethernet communication circuit, the MCU circuit, the FPGA message circuit and the indicator lamp driving circuit;

the hundred-million optical fiber Ethernet communication circuit converts an external optical fiber Ethernet LVPECL signal into an MII signal and is connected with the FPGA message circuit;

the indicator light driving circuit is connected with the FPGA message circuit.

The LED lamp beads are three and are red-green double-color LED lamp beads respectively. The device is connected with a DC220V power supply and a GOOSE message, the switch position is displayed through 3 red-green double-color LED lamp beads, the switch position is represented by red, and the switch position is represented by green;

the working principle of the scheme is as follows:

the device adopts matched PC terminal SCD file analysis software in the prior art to form an intelligent substation plug-in switch position state indicating system; the PC terminal SCD file analysis software is used for analyzing the related configuration information representing the switch position in the GOOSE message according to the SCD file at the whole station; and the configuration information is sent to a switch position state indicating device (the device of the scheme) through an RS232 serial port of the PC;

as shown in fig. 2, the software function module of the switch position state indicating device is composed of an MCU protocol conversion module and an FPGA message parsing module;

the MCU protocol conversion module is communicated with the PC end analysis software through an RS232 interface, receives the configuration information analyzed by the PC end software, and then writes the configuration information into an FPGA internal register through an asynchronous parallel bus; the FPGA message analysis module receives the configuration information of the MCU protocol conversion module through an asynchronous parallel bus interface, extracts the position information of the three-phase or single-phase circuit breaker from the received GOOSE message according to the configuration information, outputs the position information to the indicating lamp driving module through the IO pin, and displays the real-time position of the switch through the indicating lamp.

In an intelligent substation, a secondary device (such as a measurement and control device) and a primary intelligent device (such as an intelligent terminal) have more information interaction relations among multiple devices due to the fact that the multiple devices are located in a network, and the interaction relations are embodied in SCD files of the whole substation. The method comprises the steps of obtaining intelligent terminal information of a specified circuit breaker from a process layer network GOOSE message, firstly, needing a configuration tool to analyze an SCD file, and stripping the GOOSE associated information.

According to the principle of the GOOSE information analysis flow chart, as shown in fig. 3, the intelligent terminal transmits GOOSE information which is in accordance with IEC61850 at the current stage from a GOOSE transmission port TX and transmits the GOOSE information to the device through an optical fiber link, and simultaneously, the GOOSE information is analyzed one by utilizing the principle of GOOSE message frame format analysis in IEC61850 and converted into 1 or 0 digital signals, so that the conversion of optical signals and digital signals is realized. After the GOOSE information is converted into the digital signal, the digital signal is transmitted to the relay corresponding to the GOOSE information, and the relay judges whether the corresponding signal lamp is lightened or not according to the received digital signal (0 or 1), so that the digital signal and the electric signal are replaced. Finally, the conversion between optical signals and electric signals of GOOSE information is realized, and the position of the intelligent station breaker is converted into a state indicator lamp for displaying.

The hardware of the device adopts an MCU + FPGA architecture. The MCU is mainly responsible for receiving appointed configuration information from the analysis tool from the serial port and transmitting the appointed configuration information to the FPGA from the inside, meanwhile, the FPGA acquires external optical fiber Ethernet information, analyzes the GOOSE message according to the configuration information, appoints required information (such as a switch position) and finally outputs the information to the position indicator lamp or switches on the relay.

The utility model designs a customized metal case, the size of the case is about 19cm x 15.5cm x 4.5cm, the case only occupies less space in a protection/measurement and control screen, the space in the screen does not need to be rearranged basically, and the wiring is simple and only needs to be accessed into a DC200V power supply and a GOOSE optical fiber. The utility model uses 3 large-size high-power red-green LED lamp beads which are round lamp beads with the diameter of about 3cm and the power of about 2w, respectively and directly displays the current positions of A, B, C-phase circuit breakers, the observation distance reaches 20m, and the state of the circuit breaker can be quickly and accurately acquired outside a main control room.

The utility model has the technical characteristics that:

1. the portable plug-in type is quick and convenient to use.

The volume is small, and the intelligent station can be quickly installed at various indoor and outdoor appointed positions; and can also be used as a temporary indication of the portable equipment. The configuration tool is simple to operate, the SCD is visually operated, once the configuration is correctly downloaded, the optical fibers are correctly connected, various states of the indicating lamp are displayed, and GOOSE broken chain and three-phase opening and closing positions can be definitely known.

2. Excellent performance and is suitable for various working environments.

The device adopts FPGA to analyze and process the GOOSE message in real time, the hardware loop and the protection measurement and control device are designed similarly, and only 20ms is needed from the receiving of the GOOSE message to the display (or the display) of the indicating lamp, which is higher than the actual requirement of the site. The outdoor temperature and humidity control system is designed for outdoor installation and can adapt to a wider temperature and humidity range.

3. And a classic MCU + FPGA architecture is adopted, so that the function expandability is strong.

Although the device is designed at the beginning mainly for analyzing the switch position in the GOOSE information of the intelligent terminal and displaying the switch position in the mode of the indicator light, the device can be customized to be used by other functional equipment of the intelligent station by slightly modifying the device due to higher intelligent degree. For example, in a GOOSE analog quantity message, if the GOOSE analog quantity message contains the disconnecting link temperature analog quantity information, only a simple digital display screen is needed to be added, and the device can analyze and display the temperature information through configuration; since the high-performance chip such as the FPGA is provided, the current and voltage can be analyzed and displayed on site even if SV data of the cell is merged.

The disclosure of the present application also includes the following points:

(1) the drawings of the embodiments disclosed herein only relate to the structures related to the embodiments disclosed herein, and other structures can refer to general designs;

(2) the embodiments and features of the embodiments disclosed herein can be combined with each other to arrive at new embodiments without conflict;

the above embodiments are only embodiments disclosed in the present disclosure, but the scope of the disclosure is not limited thereto, and the scope of the disclosure should be determined by the scope of the claims.

Claims

1. The plug-in switch position state indicating device of the intelligent substation is characterized by comprising a power supply circuit, a serial port communication circuit, an Ethernet communication circuit, an MCU circuit, an FPGA message circuit and an indicator lamp driving circuit;

the power supply circuit provides power for the serial port communication circuit, the Ethernet communication circuit, the MCU circuit, the FPGA message circuit and the indicator light driving circuit;

the RS232 circuit is connected with the MCU circuit and is used for converting an RS232 level and a TTL level;

the indicator light driving circuit is connected with the FPGA message circuit.

2. The intelligent substation plug-in switch position status indicating device of claim 1, wherein the FPGA message circuit comprises an FPGA chip and a second crystal circuit electrically connected.

3. The plug-in switch position status indicator of an intelligent substation of claim 1, wherein the indicator light driving circuit comprises a driving chip and a relay which are electrically connected.

4. The plug-in switch position status indicating device of intelligent substation of claim 1, characterized in that still includes a plurality of LED lamp pearls that are responsible for showing the circuit breaker position.

5. The plug-in switch position status indicating device of an intelligent substation of claim 4, wherein the number of the LED lamp beads is three, and the LED lamp beads are red and green LED lamp beads.