CN218068611U - Distribution terminal big dipper time setting device - Google Patents

Abstract

The application belongs to the field of power distribution design, and relates to a Beidou satellite-to-satellite device for a power distribution terminal, which comprises a clock synchronization module, a master control module, a power supply module and an input/output module; the main control module carries out protocol conversion in the main control module after receiving clock information, converts local time into interface standards meeting various requirements and time code output, wherein the interface standards comprise RS232/RS422/RS485 and the like, the time code output comprises IRIG _ B codes, ASCII codes and the like, and sends the IRIG _ B codes and the ASCII codes to the input and output module, the input and output module is connected with equipment in a transformer substation, the equipment in the transformer substation comprises a fault recorder, a microcomputer protection device, a monitoring system and the like, the clock in each equipment calibrates the internal time after receiving the clock information of a GPS satellite signal, and after the time calibration of each equipment in the transformer substation is completed, each distribution equipment is calibrated, so that the calibration of all the equipment is completed.

Description

Distribution terminal big dipper time setting device

Technical Field

The application belongs to the power distribution design field, in particular to distribution terminal big dipper time to device.

Background

In recent years, with the improvement of the distribution automation level, the automatic devices are widely applied to power distribution monitoring terminals, microcomputer protection devices, fault recording devices and various data management machines in power transmission and distribution of a power grid, the matching work of the automatic devices needs a precise and uniform time, when a power distribution system breaks down, the operation monitoring of all systems in a total station under the uniform time reference and fault analysis after accidents can be realized, and the reasons and the process of the accidents can be analyzed through the sequence and the accurate time of all protection actions and switch on-off. The clock reference of standard time is provided to become the urgent need of a power plant, a substation power distribution system and even the whole power system, the unification of the clocks is an important measure for ensuring the safe operation of the power system and improving the operation reliability level, and is one of the most basic requirements of the power distribution automation system.

At present, in an important power system, the synchronization of the time of the whole line is ensured mainly by a time synchronization mechanism of a power distribution terminal and a master station, but the master station has a certain inaccurate probability of time and low communication efficiency.

Computer monitoring systems, automation and line microcomputer protection devices, fault recording devices, electric energy charging systems, SCADA systems and the like of different manufacturers are adopted in the power plant, and the time synchronization forms of the power plant mainly comprise the following steps:

1) Each equipment provider adopts a respective independent clock, and each clock has certain deviation in time setting precision due to the difference of product quality, so that each system of the whole plant cannot perform data analysis and comparison on the basis of unified time reference, and great hidden danger is brought to correct fault analysis and judgment afterwards.

2) The time synchronization is realized by a master station time synchronization mode, the master station of the dispatching center sends time synchronization commands to synchronize clocks of all power stations in the system through the communication channels, the mode needs special communication channels, and because the distances from the dispatching center to all transformer substations are different and the communication delays are different, the system clock can only be guaranteed at the level of 100 millisecond-level errors.

Therefore, how to reduce the clock synchronization error and improve the time synchronization accuracy is a problem to be solved.

Disclosure of Invention

The utility model aims at providing a distribution terminal big dipper time setting device to there is the error in each power station clock synchronization among the solution prior art, each equipment is difficult to the problem of unified time reference.

The technical scheme of the application is as follows: a Beidou time synchronization device for a power distribution terminal comprises a clock synchronization module, a master control module, a power supply module and an input/output module; the power supply module is used for supplying power to the clock synchronization module, the master control module and the input and output module, the clock synchronization module is used for receiving clock information of GPS satellite signals and sending the clock information to the master control module, the input and output module is connected with equipment in a transformer substation, the master control module receives the clock information sent by the clock synchronization module and sends the clock information to the input and output module, the input and output module sends the input amount to the equipment in the transformer substation, the equipment feeds back the output amount to the input and output module, and then the input and output module feeds back the output amount to the master control module.

Preferably, a plurality of different serial interfaces are arranged in the input/output module, a channel distribution module is arranged in the main control module, type information of different serial interfaces is registered in the channel distribution module, and the channel distribution module calls different interface functions according to the type information of different serial interfaces and sends the different interface functions to corresponding serial interfaces for time coding output.

Preferably, the main control module comprises a processing chip and a metering chip, the processing chip is used for sending a timing instruction, receiving timing data and uploading the timing data to the power distribution terminal, and the metering chip is used for calculating the opening and closing amount.

Preferably, the clock synchronization device further comprises a display, the display is connected with the main control module, and the main control module receives the clock information in the clock synchronization module and then sends the clock information to the display for displaying.

Preferably, the system further comprises a human-computer interaction module, wherein the human-computer interaction module is connected with the main control module and can send a control instruction to the main control module.

The Beidou satellite alignment device of the power distribution terminal comprises a clock synchronization module, a master control module, a power supply module and an input/output module; the main control module carries out protocol conversion in the main control module after receiving clock information, converts local time into interface standards meeting various requirements and time code output, wherein the interface standards comprise RS232/RS422/RS485 and the like, the time code output comprises IRIG _ B codes, ASCII codes and the like, and sends the IRIG _ B codes and the ASCII codes to the input and output module, the input and output module is connected with equipment in a transformer substation, the equipment in the transformer substation comprises a fault recorder, a microcomputer protection device, a monitoring system and the like, the clock in each equipment calibrates the internal time after receiving the clock information of a GPS satellite signal, and after the time calibration of each equipment in the transformer substation is completed, each distribution equipment is calibrated, so that the calibration of all the equipment is completed.

Drawings

In order to more clearly illustrate the technical solutions provided in the present application, the drawings will be briefly described below. It is to be understood that the drawings described below are merely exemplary of some embodiments of the application.

Fig. 1 is a schematic view of the overall structure of the present application.

1. A clock synchronization module; 2. a main control module; 3. a power supply module; 4. an input-output module; 5. Processing the chip; 6. a metering chip; 7. a display; 8. and a man-machine interaction module.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.

A Beidou satellite alignment device of a power distribution terminal performs clock synchronization by receiving clock information of a GPS satellite.

As shown in fig. 1, the device comprises a clock synchronization module 1, a main control module 2, a power supply module 3 and an input/output module 4. The power supply module 3 is used for supplying power to the clock synchronization module 1, the main control module 2 and the input/output module 4, the clock synchronization module 1 utilizes an RS232 interface to receive clock information of GPS satellite signals and sends the clock information to the main control module 2, the input/output module 4 is connected with equipment in a transformer substation, the main control module 2 receives the clock information sent by the clock synchronization module 1 and sends the clock information to the input/output module 4, the input/output module 4 sends the input amount to equipment in the transformer substation, the output amount is fed back to the input/output module 4 by the equipment, and then the input/output module 4 feeds back the input/output amount to the main control module 2.

GPS, a global satellite navigation positioning system established by the united states military, receives signals transmitted by satellites with specialized receivers to obtain position, time and other relevant information. The GPS system sends a signal once per second, the time precision of the signal is within 1 mu s, the signal can be reliably received at any time and any position around the world, the satellite uninterruptedly sends ephemeris parameter and time information of the satellite, and the time information sent by the GPS comprises signals of year, month, day, hour, minute, second and IPPS (standard second), so the frequency precision (which can reach l0-12 magnitude) and the time precision are very high.

After the main control module 2 receives the clock information, protocol conversion is carried out in the main control module 2, the local time is converted into interface standards meeting various requirements and time code output, the interface standards comprise RS232/RS422/RS485 and the like, the time code output comprises IRIG _ B codes, ASCII codes and the like, and the interface standards and the time code output are sent to the input and output module 4, the input and output module 4 is connected with equipment in a transformer substation, the equipment in the transformer substation comprises a fault recorder, a microcomputer protection device, a monitoring system and the like, the input and output module 4 is connected with the equipment firstly, the input and output quantity is sent to corresponding equipment under a control instruction sent by the main control module 2, the equipment sends the output quantity to the input and output module 4 after processing the input and output quantity, the input and output module 4 feeds the output quantity back to the main control module 2, the main control module 2 judges whether the time interval between the input and output quantity is less than 2ms or not, if so, the time is accurate, if not, the time error exists, and the calibration is needed.

During calibration, the master control module 2 issues the time tick ripples to the clock in the corresponding module through the input and output module 4 to perform time calibration, and after the calibration is completed, the master control module is separated from the equipment and sends the calibration data to the power distribution terminal.

And after the time calibration of one device in the transformer substation is finished, the time calibrating device is connected with the next device until the calibration of all devices is finished.

After the power system breaks down, the time accuracy of the SOE is improved, the safety and stability of the power system are greatly improved, powerful evidence is provided for analyzing the fault condition and the sequence of breaker actions, and good technical conditions are created for a power grid safety and stability monitoring and control system.

Meanwhile, the structure is simple, the use is convenient, various GPS receivers are not required, and the resource waste is reduced.

Preferably, a plurality of different serial interfaces are arranged in the input/output module 4, a channel distribution module is arranged in the main control module 2, type information of different serial interfaces is registered in the channel distribution module, and the channel distribution module calls different interface functions according to the type information of different serial interfaces and sends the interface functions to corresponding serial interfaces for time coding output.

Through setting up input/output module 4, can send clock information to the substation equipment of different interfaces in, different equipment only need during the installation according to self different interface type and insert in different serial interfaces can.

The serial synchronous output method outputs time information as a serial data stream. In different devices in a power distribution station, a serial interface is the most common interface, but the input amount is not limited to be transmitted through the serial interface, and modes such as synchronous pulse output, IRIG-B code output and the like can be adopted, different interface connection modes can be adopted according to different devices, and simultaneously 2 or more connection modes can be matched for use, so that the timing precision is improved.

Preferably, the main control module 2 includes a processing chip 5 and a metering chip 6, the processing chip 5 is configured to send a timing instruction, receive timing data, and upload the timing data to the power distribution terminal, and the metering chip 6 is configured to calculate the opening/closing output.

The timing instructions include issuing an input amount, issuing timing ripple and the like. By setting two chips and respectively executing different functions, the time synchronization efficiency is ensured.

Preferably, the clock synchronization device further comprises a display, the display 7 is connected with the main control module 2, and the main control module 2 receives the clock information in the clock synchronization module 1 and then sends the clock information to the display 7 for displaying. Through setting up display 7, the staff can relatively conveniently reachs current time information, and the convenience is compared with other time information, can in time discover when breaking down.

Preferably, the intelligent control system further comprises a human-computer interaction module 8, wherein the human-computer interaction module 8 is connected with the main control module 2, and the human-computer interaction module 8 can send a control instruction to the main control module 2. The man-machine interaction module 8 is specifically a key module, and each key is provided with different instructions, and the man-machine interaction module is convenient to disassemble, assemble and debug by sending different key instructions, specifically including opening, closing, suspending and other instructions.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (5)

1. The utility model provides a distribution terminal big dipper time setting device which characterized in that: the system comprises a clock synchronization module (1), a main control module (2), a power supply module (3) and an input/output module (4); the power supply module (3) is used for supplying power to the clock synchronization module (1), the main control module (2) and the input/output module (4), the clock synchronization module (1) is used for receiving clock information of GPS satellite signals and sending the clock information to the main control module (2), the input/output module (4) is connected with equipment in a transformer substation, the main control module (2) receives the clock information sent by the clock synchronization module (1) and sends the clock information to the input/output module (4), the input/output module (4) sends the input amount to equipment in the transformer substation, and the equipment feeds back the output amount to the input/output module (4) and then is fed back to the main control module (2) by the input/output module (4).

2. The distribution terminal Beidou time pairing device according to claim 1, characterized in that: the multi-serial-interface time code output device is characterized in that a plurality of different serial interfaces are arranged in the input/output module (4), a channel distribution module is arranged in the main control module (2), type information of different serial interfaces is registered in the channel distribution module, and the channel distribution module calls different interface functions according to the type information of different serial interfaces and sends the interface functions to the corresponding serial interfaces for time code output.

3. The distribution terminal Beidou time pairing device according to claim 1, characterized in that: the main control module (2) comprises a processing chip (5) and a metering chip (6), the processing chip (5) is used for sending a timing instruction, receiving timing data and uploading the timing data to a power distribution terminal, and the metering chip (6) is used for calculating the opening and closing output.

4. The distribution terminal Beidou time pairing device according to claim 1, characterized in that: the clock synchronization device is characterized by further comprising a display, the display (7) is connected with the main control module (2), and the main control module (2) receives clock information in the clock synchronization module (1) and then sends the clock information to the display (7) for displaying.

5. The distribution terminal Beidou time pairing device according to claim 1, characterized in that: the intelligent control system is characterized by further comprising a human-computer interaction module (8), wherein the human-computer interaction module (8) is connected with the main control module (2), and the human-computer interaction module (8) can send a control instruction to the main control module (2).

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