CN210670094U

CN210670094U - Master-slave clock and monitoring device based on PTN network

Info

Publication number: CN210670094U
Application number: CN201922300822.2U
Authority: CN
Inventors: 朱哲然; 杨铁军; 王红印; 冯兆旭; 刘哲睿; 杨林; 薛婕
Original assignee: Jiaozuo Power Supply Co of State Grid Henan Electric Power Co Ltd
Current assignee: Jiaozuo Power Supply Co of State Grid Henan Electric Power Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-06-02
Anticipated expiration: 2029-12-20

Abstract

The utility model relates to the technical field of electric power systems, and discloses a master-slave clock and monitoring device based on a PTN network, which comprises a receiving unit, a control unit, a frequency source, a time generating unit, a display unit, an output unit and a power supply unit; the receiving unit is electrically connected with the control unit, the frequency source and the time generating unit, the control unit is electrically connected with the frequency source and the time generating unit, the display unit and the output unit, the frequency source and the time generating unit are electrically connected with the output unit, the display unit displays the state in real time, the output unit outputs time information, and the power supply unit is responsible for providing a working power supply. The utility model discloses can provide safe and reliable's time signal of high accuracy, demand when satisfying the dispatch automation system to unified high accuracy.

Description

Master-slave clock and monitoring device based on PTN network

Technical Field

The utility model relates to an electric power system technical field especially relates to a principal and subordinate clock and monitoring device based on PTN network.

Background

The scale expansion of the power system and the development of the control technology of the power system provide new requirements for the time reference of each scheduling system, power plants and transformer substations, the accuracy of the time synchronization of the power system is an important basic condition for guaranteeing the operation control and fault analysis of the power system, and the core function of the time synchronization is to provide time synchronization service for transient, dynamic and steady data acquisition and power grid fault analysis.

Except for the recently operated 500kV transformer substation and 220kV transformer substation, most of the other transformer substations are provided with a single GPS, a few of the other transformer substations are provided with double GPS, devices such as PMU (phasor measurement Unit) and fault recording are independently provided with the GPS, and a plurality of independent GPS systems in the transformer substation have the problems of single time service interface and low time service degree, cannot meet the requirement of unified time service of secondary system devices in the transformer substation and the whole network, and partial 110kV and 35kV transformer substations do not have GPS time service systems and only can rely on protocol time service.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned current technical problem, the utility model provides a master-slave clock and monitoring device based on PTN network.

In order to achieve the above object, the utility model provides a following technical scheme: a master-slave clock and monitoring device based on a PTN network comprises a receiving unit, a control unit, a frequency source and time generating unit, a display unit, an output unit and a power supply unit;

the receiving unit receives time information and transmits the time information to the control unit, the frequency source and the time generating unit, the receiving unit is electrically connected with the control unit, the frequency source and the time generating unit, the control unit processes and transmits the received time information, the control unit is electrically connected with the frequency source and the time generating unit, the display unit and the output unit, the frequency source and the time generating unit processes and transmits the received time information to the output unit, the frequency source and the time generating unit are electrically connected with the output unit, the display unit displays the state in real time, the output unit outputs the time information, and the power supply unit is responsible for providing a working power supply.

Preferably, the receiving unit includes an external signal source receiving unit and a 10MHz frequency signal output unit, the external signal source receiving unit includes a plurality of standard input modules, and the 10MHz frequency signal output unit outputs a 10MHz frequency signal and transmits the 10MHz frequency signal to the control unit for frequency correction.

Preferably, the number of the standard input modules is six, and the standard input modules are respectively a BDS satellite receiving module, a GPS satellite receiving module, two IRIG-B code receiving modules and two PTP receiving modules.

Preferably, the receiving unit includes a 74F541 chip, the 74F51 chip is electrically connected to the external signal source receiving unit, and the 74F51 chip receives the time message information and the 1PPS second pulse from the external signal source receiving unit and transmits the time message information and the 1PPS second pulse to the control unit for time information processing.

Preferably, the frequency source and time generating unit includes a multi-clock management module and a time information generating module, the multi-clock management module is configured to preferentially select an input signal of one standard input module as a time reference source, and input signals of other standard input modules are time standby sources.

Preferably, the output unit includes a PTP output module, a light output module, and an information output module.

The utility model provides a can realize big dipper GPS bimodulus high accuracy time service system, support to many time sources real-time supervision and undisturbed switching, provide multiclass standard interface time service mode, the utility model provides a many time source management module is a fault-tolerant technique to the time source trouble, can avoid the time source inefficacy to the risk that electric wire netting operational control brought.

The utility model can provide safe and reliable high-precision time signals, meet the requirement of a dispatching automation system for uniform high-precision time, and the primary clock time synchronization can be switched and selected between the Beidou and the GPS and has the current primary state display; the method is characterized in that the existing PTN communication network of the power is accessed, a clock system of a regional local dispatching center is used as a time reference, and a networking scheme of hierarchical regional synchronization is adopted. The regional center provides regional time, the regional network ensures time synchronization in each region, the regional centers are synchronized upwards, and the layered coverage range achieves the uniform time of the whole network.

The utility model discloses can realize that electric power system whole network time precision is superior to 1 mus, not only can greatly improve the synchronous precision between each power equipment of system inside, ensure the accuracy of line fault workshop and electric wire netting parameter check, can improve the fault analysis ability and the stable control level of electric wire netting moreover, also make the change and the upgrading of time reference become simple relatively and easy in the system simultaneously.

The utility model discloses a clock of big dipper and GPS system is as electric power system time synchronization source, has realized that the construction uses the day base to be main, the ground is as assisting, big dipper is preferential, independently controllable, safe and reliable's time synchronization net, has realized that the time synchronization precision of whole net is superior to 1 mus.

The utility model discloses in be equipped with the PTP module, can insert the current PTN communication network of electric power system, because PTN communication network has extensively used, consequently the utility model discloses can the current electric wire netting resource of make full use of to practice thrift the operation cost. Additionally, the utility model discloses a PTN and PTP technique have the universality, and the influence of the time signal degree of accuracy added value is within 300ns under the time source switches over the condition.

Drawings

Fig. 1 is a schematic block diagram of the present embodiment.

Fig. 2 is an operation schematic diagram of the receiving unit in the present embodiment.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

Examples

Referring to fig. 1-2, a master-slave clock and monitoring apparatus based on PTN network includes a receiving unit, a control unit, a frequency source and time generating unit, a display unit, an output unit, and a power supply unit;

The receiving unit comprises an external signal source receiving unit and a 10MHz frequency signal output unit, the external signal source receiving unit comprises a plurality of standard input modules, and the 10MHz frequency signal output unit outputs 10MHz frequency signals and transmits the 10MHz frequency signals to the control unit for frequency correction.

The standard input modules are provided with six and respectively comprise a BDS satellite receiving module, a GPS satellite receiving module, two IRIG-B code receiving modules and two PTP receiving modules.

The receiving unit comprises a 74F541 chip, the 74F51 chip is electrically connected with the external signal source receiving unit, and the 74F51 chip receives the time message information and the 1PPS second pulse from the external signal source receiving unit and transmits the time message information and the 1PPS second pulse to the control unit for time information processing.

The frequency source and time generating unit comprises a multi-clock management module and a time information generating module, wherein the multi-clock management module is used for preferentially selecting the input signal of one standard input module as a time reference source, and the input signals of other standard input modules are time standby sources.

The output unit comprises a PTP output module, an optical output module and an information output module.

The utility model discloses a theory of operation does: the receiving unit comprises a BDS satellite receiving module, a GPS satellite receiving module, two IRIG-B code receiving modules and two PTP receiving modules, and is used for respectively receiving time information from a satellite, a B code and a PTP and transmitting the time information to the frequency source and the time generating unit; the frequency source and time generating unit processes the received time information and finally transmits the time information to the output unit; the display unit is used for combining the liquid crystal display with the frequency source and the time generation unit, displaying the state of the equipment in real time and facilitating the setting of parameters by a user; the output unit is used for outputting the time information in a mode of various time information; the power supply unit is used for providing working power supply for the equipment and ensuring that the equipment operates under normal power supply.

The receiving unit comprises a BDS satellite receiving module, a GPS satellite receiving module, an IRIG-B code receiving module and a PTP receiving module, and the use selection of each receiving module is divided into two modes: the method comprises the steps of firstly, automatically selecting a time source according to time source enabling and time source priority; and two manual settings for appointing and selecting a fixed input time source. In the receiving unit, each receiving module receives an external time signal, analyzes time message information and 1PPS (pulse per second), and transmits the time message information and the 1PPS (pulse per second) to the control unit through a 74HC541 chip for time information processing.

In this embodiment, the crystal oscillator generates a 10MHz frequency signal, and transmits the signal to the control unit for frequency correction.

The frequency source and time generation unit comprises a multi-clock management module and a time information generation module (time serial port message, 1PPS/1PPM/1PPH/1PPD, standard 10 MHZ), wherein the multi-clock management module can preferentially select one time source as a time reference source, other time sources are standby, when the selected time source is invalid, the current reference time source is selected according to a source validity strategy and a priority strategy, and the priority sequence of the time source can be manually configured in advance. Meanwhile, the utility model discloses real-time contrast access time source, the filtration has the too big invalid time source with the great scheduling problem of time output jump of time deviation, when the time source switches, if there is certain time deviation between two time sources of switching, then according to certain step length, progressively corrects the deviation, realizes the seamless switching of time source.

In this embodiment, the Beidou is preferentially selected as the time reference source, and other time sources are standby. When the satellite receiving module is not used, the time source can select external B code input or PTP time input, and when the three time sources are enabled and effective, the time source is selected according to the set time source priority. Master clock unit external reference source selection order: BD navigation system, GPS navigation system, ground wired, hot standby signal. Selecting an order from a reference source external to the clock unit: IRIG-B1, IRIG-B2, PTP1 and PTP 2.

The multi-clock management module is a fault-tolerant technology of time source faults, and risks brought to power grid operation control due to time source failure can be avoided.

After the time source is selected, the frequency source and the time generating unit perform error calculation on 10MHZ provided by the crystal oscillator and 1PPS second pulse of the selected time source, perform frequency correction through the frequency correcting part, and finally output standard 10MHZ frequency to each working unit. And meanwhile, the frequency source and the time generating unit receive the time information of the time source, process the time information and output standard time information and standard time pulses to the control unit.

Claims

1. A master-slave clock and monitoring device based on PTN network is characterized in that: comprises a receiving unit, a control unit, a frequency source and time generating unit, a display unit, an output unit and a power supply unit;

2. The PTN network-based master-slave clock and monitoring device as claimed in claim 1, wherein: the receiving unit comprises an external signal source receiving unit and a 10MHz frequency signal output unit, the external signal source receiving unit comprises a plurality of standard input modules, and the 10MHz frequency signal output unit outputs 10MHz frequency signals and transmits the 10MHz frequency signals to the control unit for frequency correction.

3. The PTN network-based master-slave clock and monitoring device as claimed in claim 2, wherein: the standard input modules are provided with six and respectively comprise a BDS satellite receiving module, a GPS satellite receiving module, two IRIG-B code receiving modules and two PTP receiving modules.

4. The PTN network-based master-slave clock and monitoring device as claimed in claim 2, wherein: the receiving unit comprises a 74F541 chip, the 74F51 chip is electrically connected with the external signal source receiving unit, and the 74F51 chip receives the time message information and the 1PPS second pulse from the external signal source receiving unit and transmits the time message information and the 1PPS second pulse to the control unit for time information processing.

5. The PTN network-based master-slave clock and monitoring device as claimed in claim 2, wherein: the frequency source and time generating unit comprises a multi-clock management module and a time information generating module, wherein the multi-clock management module is used for preferentially selecting the input signal of one standard input module as a time reference source, and the input signals of other standard input modules are time standby sources.

6. The PTN network-based master-slave clock and monitoring device as claimed in claim 1, wherein: the output unit comprises a PTP output module, an optical output module and an information output module.