A time-frequency synchronization evaluation device and method for power 5G network timing

Abstract

The present invention belongs to the field of electric power system, and discloses a time-frequency synchronization evaluation device and method for timing of electric power 5G network, including a 5G timing module, an atomic clock unit and a test server; the 5G timing module and the atomic clock unit are connected to the test server; the 5G timing module is used to obtain the timing and frequency information of the electric power 5G network, and send it to the test server; the atomic clock unit is used to obtain the reference time and frequency information and send it to the test server; the test server is used to compare the timing and frequency information with the reference time and frequency information, and obtain the error between the timing and frequency information and the reference time and frequency information as the time-frequency synchronization evaluation result. By setting the 5G timing module to directly obtain the timing and frequency information of the electric power 5G network, and using this as the evaluation object to compare with the reference time and frequency information, the timing accuracy of the electric power 5G network is directly obtained, which is consistent with the method adopted by the high-precision timing of the 5G terminal, and can correctly and more accurately evaluate the accuracy of timing under the 5G network.

Description

Technical Field

[0001] The present invention belongs to the field of electric power systems and relates to a time-frequency synchronization evaluation device and method for electric power 5G network timing. Background Art

[0002] Today, time information is widely used in the fields of telecommunications, electricity, aerospace, surveying and mapping, science and technology, and IT. Whether it is a time level signal, a time message, or a time data packet, the time synchronization tester can perform accurate measurements, allowing users to accurately calibrate existing equipment. In the power system, with the improvement of time accuracy in power plants and substations, unified and accurate time is an important measure to ensure the safe operation of the power system and improve the operation level. With unified and accurate time, it is possible to monitor the operation of the power system under the time reference, and to analyze the cause and process of the accident through the sequence of switch actions, adjustments, and accurate time after the accident. Therefore, it is very necessary to establish a dedicated time synchronization system in power plants, substations, and dispatching centers within the power system.

[0003] At the same time, after establishing a dedicated time synchronization system, it is necessary to evaluate the time and frequency synchronization performance of the time synchronization system. For example, China's patent application, publication number CN108063644A, discloses a time synchronization accuracy verification and reliability evaluation system, which belongs to the field of time signal measurement and analysis technology, including a power module, an input module and an output module respectively connected to the receiving module, and the input module and the output module are respectively connected to the receiving module through optical fibers; the input module includes an external satellite source, a network interface, a dual input channel and a key input device; the output module includes a PPS / serial port message output, an IRIG B (DC) output, a programmable empty contact output, a visual interface display, a USB interface and an internal training source. The UTC time is searched by GPS / BD, and the UTC time is used to train the internal rubidium clock. After the internal rubidium clock and the UTC time are highly synchronized, the external clock source signal is received and compared with the internal time to verify the accuracy of the external clock source. After entering the synchronization state, the clock tester can obtain extremely high time accuracy and can be used as a high-precision time reference to verify its accuracy and test accuracy.

[0004] With the development of 5G technology, more and more power systems are using 5G networks for timing. However, most of the existing evaluation methods are similar to the above methods, which are only aimed at the time accuracy test of the power grid system. All of them are time reliability evaluation systems based on input and output modules. In this type of system, only the received time can be compared with the internal time signal to verify the time accuracy, but the time and frequency synchronization accuracy cannot be tested. The functions are simple and can only evaluate the end-to-end timing error based on timing methods such as the NTP timing protocol. It is impossible to evaluate the error caused by the 5G wireless link, and it is impossible to evaluate the timing error when the 5G timing signaling is used as the timing method. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a time-frequency synchronization evaluation device and method for power 5G network timing.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In one aspect of the present invention, a time-frequency synchronization evaluation device for power 5G network timing includes a 5G timing module, an atomic clock unit, and a test server;

[0008] Both the 5G timing module and the atomic clock unit are connected to the test server; the 5G timing module is used to obtain the timing and frequency information of the power 5G network and send it to the test server; the atomic clock unit is used to obtain the reference time and frequency information and send it to the test server; the test server is used to compare the timing and frequency information with the reference time and frequency information, and obtain the error between the timing and frequency information and the reference time and frequency information as the time and frequency synchronization evaluation result.

[0009] The time-frequency synchronization evaluation device for power 5G network timing of the present invention is further improved in that:

[0010] It also includes a GNSS control unit, which is connected to the atomic clock unit; the GNSS control unit is used to receive and resolve GNSS information, obtain reference time and frequency information and send it to the atomic clock unit.

[0011] An Ethernet timing interface is arranged on the atomic clock unit; the atomic clock unit obtains reference time and frequency information from the Ethernet via the Ethernet timing interface.

[0012] The 5G timing module is connected to the test server by wire, and data is transmitted between the 5G timing module and the test server in the form of 1PPS signal or PTP protocol.

[0013] The 5G timing module is used to obtain timing and frequency information through TAP technology.

[0014] The atomic clock unit uses a cesium atomic clock or a rubidium atomic clock as a clock source.

[0015] It also includes an oscilloscope, which is connected to both the 5G timing module and the atomic clock unit; the oscilloscope is used to obtain and display timing time and frequency information and reference time and frequency information.

[0016] It also includes a display, which is connected to the test server and is used to display the time-frequency synchronization evaluation result.

[0017] It also includes a backup power supply, which is connected to the 5G timing module, atomic clock unit and test server.

[0018] It also includes a B-code tester; one end of the B-code tester is connected to the 5G timing module, and the other end is connected to the test server.

[0019] It also includes an eSIM card, which is embedded in the test server; the eSIM card is used for the 5G timing module's power 5G network access authentication.

[0020] It also includes a switch, one end of which is connected to the test server, and the other end is connected to both the 5G timing module and the atomic clock unit.

[0021] In a second aspect of the present invention, a method for evaluating time and frequency synchronization of a 5G power network timing service comprises the following steps: obtaining the timing and frequency information of the 5G power network through a 5G timing module; obtaining reference time and frequency information through an atomic clock unit; comparing the timing and frequency information with the reference time and frequency information, and obtaining the error between the timing and frequency information and the reference time and frequency information as a result of the time and frequency synchronization evaluation.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The time-frequency synchronization evaluation device for the electric power 5G network timing of the present invention directly obtains the timing and frequency information of the electric power 5G network by setting a 5G timing module, and uses this as an evaluation object to compare with the reference time and frequency information provided by the atomic clock unit, which is consistent with the method of using 5G timing signaling for timing during high-precision timing of 5G terminals, and can effectively evaluate the timing error caused by the 5G wireless link, and then correctly and more accurately evaluate the accuracy of the timing under the electric power 5G network, and based on the evaluation results, determine the accuracy of the timing of the power system, thereby ensuring the accuracy of the unified time of the entire power system and ensuring the safe operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a time-frequency synchronization evaluation device for power 5G network timing according to the present invention;

[0025] Figure 2 This is a structural schematic diagram of another time-frequency synchronization evaluation device for power 5G network timing according to the present invention. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0029] In the field of power systems, conventional time-frequency synchronization evaluation devices currently generally obtain the timing and frequency information to be evaluated directly from the terminal equipment. However, the timing and frequency information has been synchronized once through the terminal equipment, such as the on-site server or industrial computer. The timing and frequency information to be evaluated is not the timing and frequency information directly synchronized. After the time and frequency synchronization of the terminal equipment, the timing and frequency information has a certain degree of deviation, which may be at the subtle level. For the high-precision video synchronization required by the power system, this error has already had a huge impact on the evaluation results of the timing and frequency information, and the evaluation results are quite different from the actual ones.

[0030] See also Figure 1 In one embodiment of the present invention, a time-frequency synchronization evaluation device for power 5G network timing is provided to more accurately evaluate the accuracy of timing under 5G technology.

[0031] Specifically, the time and frequency synchronization evaluation device for the power 5G network timing includes a 5G timing module, an atomic clock unit and a test server; wherein, the 5G timing module and the atomic clock unit are both connected to the test server; the 5G timing module is used to obtain the timing and frequency information of the power 5G network, and send it to the test server; the atomic clock unit is used to obtain the reference time and frequency information and send it to the test server; the test server is used to compare the timing and frequency information with the reference time and frequency information, and obtain the error between the timing and frequency information and the reference time and frequency information as the time and frequency synchronization evaluation result.

[0032] The above-mentioned timing and frequency information and reference time and frequency information are limitations of time and frequency information, which includes time synchronization information and frequency synchronization information. Frequency synchronization refers to the frequency reference based on time synchronization, such as the 1Hz reference frequency obtained by the time synchronization PPS, rather than other frequency synchronization (such as frequency synchronization based on a phase-locked loop or square loop, or frequency synchronization based on blind detection in 5G networks). Reference time and frequency information is pre-acquired and recognized as accurate time information and frequency information.

[0033] The atomic clock unit generally includes an atomic clock controller and a clock source. Preferably, a cesium atomic clock or a rubidium atomic clock is generally used as the clock source. The atomic clock unit is used to maintain time accuracy, such as obtaining reference time and frequency information from a reference time source before conducting an evaluation. Since the reference time source cannot generally be accurately obtained on site, it is necessary to first obtain the reference time and frequency information through the atomic clock unit and use it as a test benchmark for testing. If it is an ordinary clock, a large drift will occur after obtaining the reference time and frequency information, while the drift of the atomic clock unit is very small, which can effectively ensure the accuracy of the reference time and frequency information, and thus ensure the evaluation accuracy of the evaluation results.

[0034] The test server is generally a microcomputer that can support the operation of the Linux system and can be equipped with a network card device carrying PHC for network communication and PTP protocol communication.

[0035] By comparing the timing and frequency information with the reference time and frequency information on the test server, the timing and frequency information is generally directly subtracted from the reference time and frequency information to obtain the error between the timing and frequency information and the reference time and frequency information, which generally includes time synchronization error and frequency synchronization error. This is used as the time and frequency synchronization evaluation result to complete the time and frequency synchronization evaluation of the power 5G network timing.

[0036] The time-frequency synchronization evaluation device for the electric power 5G network timing of the present invention directly obtains the timing and frequency information of the electric power 5G network by setting a 5G timing module, and uses this as an evaluation object to compare with the reference time and frequency information provided by the atomic clock unit, which is consistent with the method of using 5G timing signaling for timing during high-precision timing of 5G terminals, and can effectively evaluate the timing error caused by the 5G wireless link, and then correctly and more accurately evaluate the accuracy of the timing under the electric power 5G network, and based on the evaluation results, determine the accuracy of the timing of the power system, thereby ensuring the accuracy of the unified time of the entire power system and ensuring the safe operation of the power system.

[0037] See also Figure 2 In another embodiment of the present invention, a time-frequency synchronization evaluation device for power 5G network timing is provided. In addition to all the contents in the above embodiments, the time-frequency synchronization evaluation device for power 5G network timing also includes at least a GNSS control unit, and the GNSS control unit is connected to the atomic clock unit.

[0038] The GNSS control unit is used to receive and resolve GNSS information, obtain reference time and frequency information and send it to the atomic clock unit. In this way, the GNSS (Global Positioning Navigation System) is used as the reference time source, and the reference time and frequency information of the reference time source is obtained through the GNSS control unit, and the atomic clock unit is served. Generally, the GNSS control unit includes a differential GNSS module, a GNSS receiver and an antenna. The GNSS receiver receives the GNSS information sent by the GNSS through the antenna and sends it to the differential GNSS module. The GNSS information is parsed by the differential GNSS module to obtain the timing and frequency information of the GNSS, and this is used as the reference time and frequency information.

[0039] In yet another embodiment of the present invention, a time-frequency synchronization evaluation device for electric power 5G network timing is provided. In addition to including all the contents of the first embodiment, the time-frequency synchronization evaluation device for electric power 5G network timing is provided with an Ethernet timing interface on the atomic clock unit; the atomic clock unit obtains reference time-frequency information from Ethernet via the Ethernet timing interface.

[0040] In this way, the network time source is used as the reference time source. By setting the Ethernet timing interface on the atomic clock unit, the connection with the network time source is realized, and then the timing and frequency information of the network time source is obtained, and this is used as the reference time and frequency information. By setting the Ethernet timing interface, the network timing related configuration can be performed, and the supporting software supports network time synchronization modes including those based on protocols such as NTP and PTP.

[0041] In another embodiment of the present invention, a time-frequency synchronization evaluation device for electric power 5G network timing is provided. In addition to including all the contents of the first embodiment, the time-frequency synchronization evaluation device for electric power 5G network timing is characterized in that the 5G timing module is wiredly connected to the test server, and data is transmitted between the 5G timing module and the test server in the form of a 1PPS signal or a PTP protocol (Precision Time Protocol), wherein the 1PPS signal refers to a 1PPS second pulse signal, which is used once per second.

[0042] Based on the wired connection method, the deviation of time and frequency information in the transmission process is greatly reduced. At the same time, combined with the transmission method of 1PPS signal or PTP protocol, it effectively ensures that the timing and frequency information of the power 5G network is accurately transmitted to the test server.

[0043] In another embodiment of the present invention, a time-frequency synchronization evaluation device for power 5G network timing is provided. In addition to including all the contents of the first embodiment, the 5G timing module is used to obtain timing and frequency information through TAP (High-precision Network Timing Method over Air Interface based on Physical-layer Signals, referring to high-precision air interface time synchronization protocol) technology. Specifically, the 5G timing module is connected to a 5G base station that supports TAP technology, and the absolute time synchronization information of the air interface is calculated to obtain the absolute time. The calculation method is part of the TAP technology.

[0044] In yet another embodiment of the present invention, a time-frequency synchronization evaluation device for electric power 5G network timing is provided. In addition to including all the contents of the first embodiment, the time-frequency synchronization evaluation device for electric power 5G network timing uses a cesium atomic clock or a rubidium atomic clock as a clock source.

[0045] Among them, cesium atomic clocks use the electromagnetic waves radiated by electrons inside cesium atoms when they jump between two energy levels as a standard to control and calibrate the electronic oscillator, and thus control the movement of the clock. Cesium atomic clocks are very stable, and the best cesium atomic clocks can only differ by 1 second in 20 million years.

[0046] The rubidium atomic clock organically combines the high-stability rubidium oscillator with the high-precision timing, frequency measurement and time synchronization technology of GPS, so that the output frequency of the rubidium oscillator is synchronized with the cesium atomic clock signal of the GPS satellite, improving the long-term stability and accuracy of the frequency signal, and can provide a high-precision time and frequency standard of the cesium clock level. It is a cost-effective product to replace the cesium clock in the communication, radio and television and other departments. The output 1PPS signal is obtained by dividing the frequency signal of the rubidium oscillator, and is synchronized with the UTC time output by the GPS. At the same time, it can overcome the impact of the jump of the second pulse signal of the GPS receiver, and is a truly reproduced "UTC time reference".

[0047] See also Figure 2 In another embodiment of the present invention, a time-frequency synchronization evaluation device for power 5G network timing is provided. In addition to all the contents of the first embodiment, the time-frequency synchronization evaluation device for power 5G network timing also includes at least an oscilloscope, which is connected to both the 5G timing module and the atomic clock unit; the oscilloscope is used to obtain and display the timing time-frequency information and the reference time-frequency information.

[0048] Generally, an oscilloscope supports dual-channel input, and the timing frequency information and the reference frequency information are transmitted to the oscilloscope in the form of a 1PPS signal. Specifically, the oscilloscope is connected to the 5G timing module and the atomic clock unit via a BNC line, and the waveforms of the timing frequency information and the reference frequency information are intuitively displayed, allowing the user to intuitively see the timing error and the time and frequency synchronization accuracy of the power 5G network timing from the gap between the rising edges of the timing frequency information and the reference frequency information waveforms.

[0049] See also Figure 2 In another embodiment of the present invention, a time-frequency synchronization evaluation device for power 5G network timing is provided. In addition to all the contents of the first embodiment, the time-frequency synchronization evaluation device for power 5G network timing also includes a display, which is connected to the test server and is used to display the time-frequency synchronization evaluation results.

[0050] Specifically, the display may be an LED display or an LCD display, which is connected to the test server via a BNC line and is used to visually display the time-frequency synchronization evaluation result of the test server.

[0051] See also Figure 2 In another embodiment of the present invention, a time-frequency synchronization evaluation device for power 5G network timing is provided. In addition to all the contents of the first embodiment, the time-frequency synchronization evaluation device for power 5G network timing also includes at least a backup power supply, and the backup power supply is connected to the 5G timing module, the atomic clock unit and the test server.

[0052] The backup power supply design provides power failure protection and mobile test support for the time-frequency synchronization evaluation device, improving its adaptability to various evaluation environments. When the time-frequency synchronization evaluation device loses external power supply, it can provide power supply for a certain period of time to ensure stability and mobility.

[0053] See also Figure 2 In another embodiment of the present invention, a time-frequency synchronization evaluation device for the timing of an electric power 5G network is provided. In addition to all the contents of the first embodiment, the time-frequency synchronization evaluation device for the timing of an electric power 5G network also includes at least a B-code tester. One end of the B-code tester is connected to the 5G timing module, and the other end is connected to the test server. When the timing and frequency information of the electric power 5G network sent by the 5G timing module is in the B-code mode, the timing and frequency information cannot be directly transmitted to the test server, and the format conversion needs to be performed through the B-code tester to convert the timing and frequency information in the B-code mode into the PTP protocol format, and then transmitted to the test server through the Ethernet electrical port or the Ethernet optical port for subsequent evaluation.

[0054] See also Figure 2 In another embodiment of the present invention, a time-frequency synchronization evaluation device for power 5G network timing is provided. In addition to all the contents of the first embodiment, the time-frequency synchronization evaluation device for power 5G network timing also includes at least an eSIM card, and the eSIM card is embedded in the test server; the eSIM card is used for the power 5G network access authentication of the 5G timing module.

[0055] Specifically, eSIM card, namely Embedded-SIM, embedded SIM card. The concept of eSIM card is to embed the traditional SIM card directly into the device chip, instead of adding it to the device as an independent removable component, and the user does not need to insert a physical SIM card. Generally, eSIM card supports 5GeSIM ID function, including 5G security protocols and algorithms, which are used to protect signaling and services, such as key negotiation, integrity protection and encryption and decryption algorithms, etc., and generally also provides operator data management functions and terminal interaction functions. Based on 5G security protocols and algorithms, the 5G network access authentication of the 5G timing module is realized to ensure the security of timing signaling and timing services and prevent time tampering.

[0056] See also Figure 2 In another embodiment of the present invention, a time-frequency synchronization evaluation device for power 5G network timing is provided. In addition to all the contents of the first embodiment, the time-frequency synchronization evaluation device for power 5G network timing also includes at least a switch, one end of the switch is connected to the test server, and the other end is connected to both the 5G timing module and the atomic clock unit.

[0057] A switch is a device that completes the information exchange function in a communication system. It can provide an exclusive electrical signal path for any two network nodes connected to the switch. The most common switch is the Ethernet switch, and other common switches include telephone voice switches and fiber optic switches. Based on the design of the switch, only one Ethernet interface (including Ethernet electrical port and Ethernet optical port) can be set on the test server, thereby realizing the miniaturization of the test server and ultimately the miniaturization of the entire time-frequency synchronization evaluation device.

[0058] In another embodiment of the present invention, a time-frequency synchronization evaluation method for power 5G network timing is provided, comprising the following steps: obtaining the timing time-frequency information of the power 5G network through a 5G timing module; obtaining reference time-frequency information through an atomic clock unit; comparing the timing time-frequency information with the reference time-frequency information, and obtaining the error between the timing time-frequency information and the reference time-frequency information as a time-frequency synchronization evaluation result.

[0059] Specifically, the time and frequency synchronization evaluation method of the power 5G network timing includes the following detailed steps:

[0060] S1: Obtain reference time and frequency information from the reference time source and transmit it to the atomic clock unit.

[0061] Specifically, in one method, GNSS can be used as a reference time source, and the time and frequency synchronization evaluation device can receive GNSS information through a set GNSS control unit, obtain reference time and frequency information by parsing the GNSS information, and transmit it to the atomic clock unit in the form of a 1PPS signal.

[0062] In another way, a network time source is used as a reference time source, and a connection with the network time source is achieved through an Ethernet timing interface set on the atomic clock unit to obtain the reference time source.

[0063] S2: At the test site, the timing and frequency information of the power 5G network is obtained through the 5G timing module and sent to the test server.

[0064] Specifically, first use the eSIM card to implement the 5G timing module's 5G network access authentication, connect the 5G timing module to the power 5G network, receive the timing information of the power 5G network through the 5G timing module, and solve the timing information of the power 5G network to obtain the timing and frequency information.

[0065] When sending the timing and frequency information to the test server, when the timing and frequency information is in the form of 1PPS signal or directly connected to the test server through the PTP protocol, the timing and frequency information is directly sent to the test server. When the timing and frequency information is in B code mode, it is necessary to first convert the format through the B code tester, convert the timing and frequency information in the B code mode into the PTP protocol format, and then transmit it to the test server through the Ethernet electrical port or Ethernet optical port for subsequent evaluation.

[0066] S3: The test server obtains and compares the reference time and frequency information and the timing time and frequency information, obtains and displays the time and frequency synchronization evaluation results.

[0067] Specifically, the test server communicates with the atomic clock unit through the PTP protocol or the NTP protocol to obtain the reference time and frequency information in the atomic clock unit. At the same time, it receives the timing time and frequency information sent by the 5G timing module, and compares the reference time and frequency information with the timing time and frequency information. The reference time and frequency information can be directly subtracted from the timing time and frequency information to obtain the error between the reference time and frequency information and the timing time and frequency information, which generally includes time error and frequency error, to obtain the time and frequency synchronization evaluation result, and send the time and frequency synchronization evaluation result to the display for visual and intuitive display.

[0068] At the same time, an oscilloscope is also set up, which communicates with the 5G timing module and the atomic clock unit to obtain reference time and frequency information and timing time and frequency information, and then compares and displays the reference time and frequency information with the timing time and frequency information. By observing the difference in the rising edge of the waveforms of the reference time and frequency information and the timing time and frequency information, the error between the reference time and frequency information and the timing time and frequency information can be intuitively seen.

[0069] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A time-frequency synchronization evaluation device for power 5G network timing, characterized in that: Including 5G timing module, atomic clock unit and test server; The 5G timing module and the atomic clock unit are both connected to the test server; the 5G timing module is used to obtain the timing and frequency information of the power 5G network, using the 5G timing signaling method to obtain the timing and send it to the test server; the atomic clock unit is used to obtain the reference time and frequency information and send it to the test server; The test server is used to compare the timing time and frequency information with the reference time and frequency information, and obtain the error between the timing time and frequency information and the reference time and frequency information as the time and frequency synchronization evaluation result.

2. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: Also included is a GNSS control unit, the GNSS control unit being connected to the atomic clock unit; The GNSS control unit is used to receive and resolve GNSS information, obtain reference time and frequency information and send it to the atomic clock unit.

3. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: The atomic clock unit is provided with an Ethernet timing interface; The atomic clock unit obtains reference time and frequency information from the Ethernet through the Ethernet timing interface.

4. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: The 5G timing module is connected to the test server by wire, and data is transmitted between the 5G timing module and the test server in the form of 1PPS signal or PTP protocol.

5. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: The 5G timing module is used to obtain timing and frequency information through TAP technology.

6. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: The atomic clock unit uses a cesium atomic clock or a rubidium atomic clock as a clock source.

7. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: It also includes an oscilloscope, which is connected to both the 5G timing module and the atomic clock unit; The oscilloscope is used to obtain and display the timing and frequency information and the reference timing and frequency information.

8. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: It also includes a display, which is connected to the test server and is used to display the time-frequency synchronization evaluation result.

9. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: Also includes backup power; The backup power supply is connected to the 5G timing module, atomic clock unit and test server.

10. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: Also includes a B-code tester; One end of the B code tester is connected to the 5G timing module, and the other end is connected to the test server.

11. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: It also includes an eSIM card, which is embedded in the test server; The eSIM card is used for the 5G timing module's 5G network access authentication.

12. The time-frequency synchronization evaluation device for power 5G network timing according to claim 1 is characterized in that: It also includes a switch, one end of which is connected to the test server, and the other end is connected to both the 5G timing module and the atomic clock unit.

13. A method for evaluating the time-frequency synchronization of a 5G power network based on the time-frequency synchronization evaluation device of the 5G power network according to claim 1, characterized in that: The following steps are involved: Obtain the timing and frequency information of the power 5G network through the 5G timing module; Obtain reference time and frequency information through an atomic clock unit; Compare the timing time and frequency information with the reference time and frequency information to obtain the error between the timing time and frequency information and the reference time and frequency information as the time and frequency synchronization evaluation result.

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