Power time service terminal and system

Abstract

The present application is applicable to the field of timing technology and provides an electric power timing terminal and system, wherein the electric power timing system includes N-level timing networks, each level of timing network includes at least one electric power timing terminal, and N is an integer greater than 1; the electric power timing terminal in the lower-level timing network receives the first reference time output by the electric power timing terminal in the upper-level timing network to which it is communicated, and the electric power timing terminal in the lower-level timing network feeds back the second time and / or timing status of the electric power timing terminal to the electric power timing terminal in the upper-level timing network to which it is communicated; the electric power timing terminal in the upper-level timing network sends the second time and / or timing status fed back by each electric power timing terminal in the lower-level timing network to which it is communicated to the timing center of the upper-level timing network, thereby enhancing the time synchronization between each electric power timing terminal in the electric power timing system and improving the stability of the electric power timing system.

Description

Technical Field

[0001] This application belongs to the field of time synchronization technology, and in particular relates to a power time synchronization terminal and system. Background Technology

[0002] The BeiDou Navigation Satellite System is an independently developed satellite navigation system in my country, and it is currently widely used in fields such as power, agriculture, and water conservancy. With the increasing application of BeiDou in power systems, BeiDou time synchronization terminals with time synchronization capabilities are also frequently used for time measurement in power systems.

[0003] To ensure time synchronization across the entire power grid, existing power systems typically employ a cascading time synchronization approach. This means that the power time synchronization terminal in the next higher level of the time synchronization network serves as the time reference source for the power time synchronization terminals in the next lower level. Consequently, any clock deviation in the time reference source significantly impacts the time of the power time synchronization terminals in the next lower level. Furthermore, because different power time synchronization terminals at the same level use different time reference sources, time discrepancies can occur between them. Even if different power time synchronization terminals at the same level use the same time reference source, varying network delays can still lead to time differences between them.

[0004] It is evident that the time synchronization between various power timing terminals in the existing power timing system is poor, thereby reducing the stability of the power timing system. Summary of the Invention

[0005] In view of this, embodiments of this application provide a power timing terminal and system to solve the technical problems of poor time synchronization between various power timing terminals and low stability of the power timing system in existing power timing systems.

[0006] In a first aspect, embodiments of this application provide a power time synchronization system, including an N-level time synchronization network, each level including at least one power time synchronization terminal, where N is an integer greater than 1; the power time synchronization terminal in the next level time synchronization network receives a first reference time output by the power time synchronization terminal in the next level time synchronization network with which it is communicatively connected, and the power time synchronization terminal in the next level time synchronization network feeds back its second time and / or time synchronization status to the power time synchronization terminal in the next level time synchronization network with which it is communicatively connected; the power time synchronization terminal in the next level time synchronization network sends the second time and / or time synchronization status fed back by each power time synchronization terminal in the next level time synchronization network with which it is communicatively connected to the time synchronization center of the next level time synchronization network.

[0007] Optionally, the time synchronization status is determined by the power time synchronization terminal in the next-level time synchronization network based on the difference between the first reference time and the second time.

[0008] Optionally, when the power timing terminal in the next-level timing network detects that the difference between the first reference time and the second time is less than or equal to a preset difference threshold, it determines that the timing status is normal.

[0009] Optionally, when the power timing terminal in the next-level timing network detects that the difference between the first reference time and the second time is greater than a preset difference threshold, it determines that the timing status is abnormal.

[0010] Optionally, the communication connection between the power timing terminal in the next-level time synchronization network and the power timing terminal in the previous-level time synchronization network is established based on a high-precision time synchronization protocol or a network time protocol.

[0011] Secondly, embodiments of this application provide a power timing terminal, including:

[0012] The processing unit is used to receive a first reference time output by a power time synchronization terminal in the upper-level time synchronization network that is communicatively connected to this power time synchronization terminal, and to acquire a second time from this power time synchronization terminal.

[0013] A timing status feedback unit is connected to the processing unit. The timing status feedback unit is used to receive the first reference time and the second time output by the processing unit, determine the timing status of the power timing terminal based on the first reference time and the second time, and feed back the second time and / or the timing status to the power timing terminal in the next higher-level timing network.

[0014] Optionally, the timing status feedback unit is specifically used to: determine the timing status based on the difference between the first reference time and the second time.

[0015] Optionally, the timing status feedback unit is specifically used to: determine that the timing status is normal when the difference between the first reference time and the second time is less than or equal to a preset difference threshold.

[0016] Optionally, the timing status feedback unit is specifically used to: determine that the timing status is an abnormal state when it detects that the difference between the first reference time and the second time is greater than a preset difference threshold.

[0017] Optionally, the power timing terminal further includes:

[0018] The BeiDou time synchronization calculation unit is connected to the BeiDou antenna. The BeiDou time synchronization calculation unit is used to obtain the third time of this power time synchronization terminal from the BeiDou satellite.

[0019] The local clock unit is used to provide a fourth time for this power timing terminal;

[0020] The clock discipline unit is connected to the BeiDou time synchronization calculation unit and the local clock unit. The clock discipline unit is used to determine the second time of the power time synchronization terminal based on the third time and / or the fourth time, and output the second time to the processing unit.

[0021] Implementing the power timing terminal and system provided in this application has the following beneficial effects:

[0022] The power timing system provided in this application embodiment has the following advantages: First, the power timing terminal in the next-level timing network feeds back its second time and / or timing status to the power timing terminal in the next-level timing network with which it is communicatively connected. Second, the power timing terminal in the next-level timing network sends the second time and / or timing status fed back by each power timing terminal in the next-level timing network with which it is communicatively connected to the timing center of the next-level timing network. This facilitates the timing center of the next-level timing network to monitor the timing status of each power timing terminal. Furthermore, it can promptly notify maintenance personnel to perform maintenance when the timing status of a power timing terminal is abnormal, thereby enhancing the time synchronization between each power timing terminal in the power timing system and improving the stability of the power timing system. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of a power time synchronization system provided in an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure of a power timing terminal provided in an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of a power timing terminal provided in another embodiment of this application. Detailed Implementation

[0027] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0028] It should be understood that the term "and / or" as used in this application specification and the appended claims refers to any combination of one or more of the associated listed items, as well as all possible combinations, and includes such combinations. Furthermore, in the description of this application specification and the appended claims, the terms "first," "second," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0029] It should also be understood that references to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include the specific features, structures, or characteristics described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0030] Please see Figure 1 , Figure 1 This is a schematic diagram of a power timing system provided in an embodiment of this application. Figure 1 As shown, the power timing system provided in this application embodiment includes an N-level timing network, and each level of the timing network includes at least one power timing terminal, where N is an integer greater than 1.

[0031] This is an example, not a limitation. Figure 1 A three-tiered time synchronization network is shown: network-level time synchronization network 1, provincial-level time synchronization network 2, and municipal-level time synchronization network 3. Network-level time synchronization network 1 is the next-level network above provincial-level time synchronization network 2, and provincial-level time synchronization network 2 is the next-level network above municipal-level time synchronization network 3. Network-level time synchronization network 1 includes at least one power time synchronization terminal 11, provincial-level time synchronization network 2 includes at least one power time synchronization terminal 21, and municipal-level time synchronization network 3 includes at least one power time synchronization terminal 31.

[0032] It should be noted that each power timing terminal in the next-level time synchronization network is communicatively connected to one of the power timing terminals in the previous-level time synchronization network. Different power timing terminals in the same-level time synchronization network can communicate with different power timing terminals in the previous-level time synchronization network, or they can communicate with the same power timing terminal in the previous-level time synchronization network; there are no restrictions here.

[0033] The communication connection between the power time synchronization terminal in the next-level time synchronization network and the power time synchronization terminal in the previous-level time synchronization network can be established based on the Precision Time Protocol (PTP), the Network Time Protocol (NTP), or other types of power communication protocols; there are no restrictions here.

[0034] For example, a power time synchronization terminal in a higher-level time synchronization network can send a first reference time to a power time synchronization terminal in a lower-level time synchronization network via PTP or NTP. A power time synchronization terminal in a lower-level time synchronization network can also send a second time and / or time synchronization status back to a power time synchronization terminal in a higher-level time synchronization network via PTP or NTP.

[0035] In this embodiment of the application, the power timing terminal in the next-level timing network receives the first reference time output by the power timing terminal in the previous-level timing network with which it is communicatively connected, and the power timing terminal in the next-level timing network feeds back the second time and / or timing status of its own power timing terminal to the power timing terminal in the previous-level timing network with which it is communicatively connected.

[0036] The first reference time can be obtained by the power line time synchronization terminal in the next higher level time synchronization network from the power line time synchronization terminal in its next higher level time synchronization network. The first reference time output by the power line time synchronization terminal in the highest level time synchronization network can be obtained from an observatory or satellite. For example, Figure 1 The first reference time output by the power time terminal 11 in the network-level time synchronization network 1 can be obtained by the power time terminal 11 from an observatory or satellite, etc.; the first reference time output by the power time terminal 21 in the provincial time synchronization network 2 can be obtained from the power time terminal 11 in the network-level time synchronization network 1.

[0037] The second time can be obtained from a local clock or satellite by the power time synchronization terminal in the next-level time synchronization network.

[0038] The aforementioned satellites can be BeiDou satellites or satellites from other positioning systems; there are no restrictions here.

[0039] The timing status can be used to describe the accuracy of the second time obtained by the power timing terminal.

[0040] In this embodiment, the time synchronization state may include, but is not limited to, a normal state and an abnormal state. The normal state describes that the second time obtained by the power timing terminal is relatively accurate, that is, the second time is relatively close to the first reference time, indicating that the power timing terminal itself can obtain relatively accurate time information and the time synchronization function of the power timing terminal is normal. The abnormal state describes that the second time obtained by the power timing terminal is inaccurate, that is, the second time differs significantly from the first reference time, indicating that the power timing terminal itself cannot obtain relatively accurate time information and the time synchronization function of the power timing terminal is abnormal.

[0041] For example, such as Figure 1 As shown, the power time synchronization terminal 31 in the municipal time synchronization network 3 receives the first reference time output by the power time synchronization terminal 21 in the provincial time synchronization network 2, which is communicatively connected to it. The power time synchronization terminal 31 in the municipal time synchronization network 3 also feeds back its second time and / or time synchronization status to the power time synchronization terminal 21 in the provincial time synchronization network 2. The power time synchronization terminal 21 in the provincial time synchronization network 2 receives the first reference time output by the power time synchronization terminal 11 in the network-level time synchronization network 1, which is communicatively connected to it. The power time synchronization terminal 21 in the provincial time synchronization network 2 also feeds back its second time and / or time synchronization status to the power time synchronization terminal 11 in the network-level time synchronization network 1, which is communicatively connected to it.

[0042] In this embodiment, after a power time synchronization terminal in each level of the time synchronization network obtains the second time and / or time synchronization status fed back by each power time synchronization terminal in the next level of the time synchronization network with which it is communicatively connected, it can send the second time and / or time synchronization status fed back by each power time synchronization terminal in the next level of the time synchronization network to the time synchronization center of the same level of the time synchronization network. The time synchronization center can determine whether the time synchronization function of each power time synchronization terminal in the same level of the time synchronization network and / or each power time synchronization terminal in the next level of the time synchronization network is normal based on the first reference time output by each power time synchronization terminal in the same level of the time synchronization network and the second time and / or time synchronization status fed back by each power time synchronization terminal in the next level of the time synchronization network, so as to realize the monitoring of the time synchronization status of the aforementioned power time synchronization terminals. For example, when the time synchronization center detects a significant difference between the second time of a certain power time synchronization terminal in a certain level of time synchronization network and the second time of other power time synchronization terminals, it indicates that the time synchronization function of the power time synchronization terminal in the time synchronization network is abnormal. At this time, the time synchronization center can inform the scheduling system of the time synchronization network at that level, so that the scheduling system of the time synchronization network at that level can carry out maintenance on the power time synchronization terminal with abnormal time synchronization function.

[0043] For example, when the power time synchronization terminal 21 in the provincial time synchronization network 2 obtains the second time and / or time synchronization status fed back by each power time synchronization terminal 31 in the municipal time synchronization network 3 with which it is communicatively connected, it can send the second time and / or time synchronization status fed back by each power time synchronization terminal 31 in the municipal time synchronization network 3 to the time synchronization center of its own time synchronization network (i.e., the provincial time synchronization network 2). The time synchronization center of the provincial time synchronization network 2 can determine whether the second time of each power time synchronization terminal 21 and / or each power time synchronization terminal 31 is accurate based on the first reference time output by each power time synchronization terminal 21 in the provincial time synchronization network 2 and the second time and / or time synchronization status fed back by each power time synchronization terminal 31 in the municipal time synchronization network 3.

[0044] As can be seen from the above, the power timing system provided in this application embodiment, because the power timing terminal in the next-level timing network will feed back its second time and / or timing status to the power timing terminal in the next-level timing network with which it is communicatively connected, and the power timing terminal in the next-level timing network will send the second time and / or timing status fed back by each power timing terminal in the next-level timing network with which it is communicatively connected to the timing center of the next-level timing network, it is convenient for the timing center of the next-level timing network to monitor the timing status of each power timing terminal. In this way, when the timing status of the power timing terminal is abnormal, it can promptly notify the maintenance personnel to carry out maintenance, thereby enhancing the time synchronization between each power timing terminal in the power timing system and improving the stability of the power timing system.

[0045] In one embodiment of this application, the time synchronization status can be determined by the power time synchronization terminal in the next-level time synchronization network based on the difference between the first reference time and the second time.

[0046] In this embodiment, the power timing terminal in the next-level timing network can determine its timing status by performing a difference operation between the first reference time and the second time. The difference between the first reference time and the second time can be the absolute value of the difference between the two times.

[0047] In one specific implementation of this embodiment, when the power timing terminal in the next-level timing network detects that the difference between the first reference time and the second time is less than or equal to a preset difference threshold, it determines that the timing status is normal.

[0048] In another specific implementation of this embodiment, when the power timing terminal in the next-level timing network detects that the difference between the first reference time and the second time is greater than a preset difference threshold, it determines that the timing status is abnormal.

[0049] In this embodiment, when the difference between the first reference time and the second time is less than or equal to a preset difference threshold, it indicates that the second time is relatively close to the first reference time, meaning that the power timing terminal itself can obtain relatively accurate time information. Therefore, the power timing terminal determines its timing status as normal. When the difference between the first reference time and the second time is greater than the preset difference threshold, it indicates that the second time differs significantly from the first reference time, meaning that the power timing terminal itself cannot obtain relatively accurate time information. Therefore, the power timing terminal determines its timing status as abnormal.

[0050] Based on the power timing system provided in the above embodiments, this application further provides an embodiment of a power timing terminal that implements the above system embodiments.

[0051] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of a power timing terminal provided in an embodiment of this application. Figure 2 As shown, the power timing terminal 200 provided in this embodiment includes:

[0052] The processing unit 201 is used to receive a first reference time output by a power time synchronization terminal in the upper-level time synchronization network that is communicatively connected to this power time synchronization terminal 200, and to acquire a second time from this power time synchronization terminal 200.

[0053] The timing status feedback unit 202 is connected to the processing unit 201. The timing status feedback unit 202 is used to receive the first reference time and the second time output by the processing unit 201, determine the timing status of the power timing terminal 200, and feed back the second time and / or timing status of the power timing terminal 200 to the power timing terminal in the next higher level timing network.

[0054] As an example and not a limitation, suppose the power timing terminal 200 in this embodiment is Figure 1 In the municipal-level time synchronization network 3, the power time synchronization terminal 31 receives the first reference time output by the power time synchronization terminal 21 in the provincial-level time synchronization network 2, which is communicatively connected to the power time synchronization terminal 31. The time synchronization status feedback unit 202 feeds back the second time and / or time synchronization status of the power time synchronization terminal 31 to the power time synchronization terminal 21 in the provincial-level time synchronization network 2.

[0055] The first reference time can be obtained by the power line time synchronization terminal in the next higher level time synchronization network from the power line time synchronization terminal in its next higher level time synchronization network. The first reference time output by the power line time synchronization terminal in the highest level time synchronization network can be obtained from an observatory or satellite, etc. For example, Figure 1The first reference time output by the power time terminal 11 in the network-level time synchronization network 1 can be obtained by the power time terminal 11 from an observatory or satellite, etc.; the first reference time output by the power time terminal 21 in the provincial time synchronization network 2 can be obtained from the power time terminal 11 in the network-level time synchronization network 1.

[0056] The second time can be obtained by the processing unit 201 from a local clock or satellite, etc.

[0057] The aforementioned satellites can be BeiDou satellites or satellites from other positioning systems; there are no restrictions here.

[0058] The timing status can be used to describe the accuracy of the second time obtained by the processing unit 201.

[0059] In this embodiment, the time synchronization state may include, but is not limited to, a normal state and an abnormal state. The normal state describes that the second time obtained by the processing unit 201 is relatively accurate, that is, the second time is relatively close to the first reference time, indicating that the power time synchronization terminal 200 itself can obtain relatively accurate time information and the time synchronization function of the power time synchronization terminal 200 is normal. The abnormal state describes that the second time obtained by the processing unit 201 is inaccurate, that is, the second time differs significantly from the first reference time, indicating that the power time synchronization terminal 200 itself cannot obtain relatively accurate time information and the time synchronization function of the power time synchronization terminal 200 is abnormal.

[0060] In specific applications, the processing unit can be a central processing unit (CPU) or other general-purpose processors; there are no restrictions here.

[0061] In one embodiment of this application, the timing status feedback unit 202 is specifically used to: determine the timing status of the power timing terminal 200 based on the difference between the first reference time and the second time.

[0062] In this embodiment, the time synchronization status feedback unit 202 can determine the time synchronization status of the power time synchronization terminal 200 by performing a difference operation between the first reference time and the second time. The difference between the first reference time and the second time can be the absolute value of the difference between the two times.

[0063] In one specific implementation of this embodiment, the time synchronization status feedback unit 202 is specifically used to: determine that the time synchronization status of the power time synchronization terminal 200 is normal when the difference between the first reference time and the second time is less than or equal to a preset difference threshold.

[0064] In another specific implementation of this embodiment, the timing status feedback unit 202 is specifically used to: determine that the timing status of the power timing terminal 200 is abnormal when the difference between the first reference time and the second time is detected to be greater than a preset difference threshold.

[0065] In this embodiment, when the difference between the first reference time and the second time is less than or equal to a preset difference threshold, it indicates that the second time is relatively close to the first reference time, meaning that the power timing terminal 200 can obtain relatively accurate time information. Therefore, the timing status feedback unit 202 determines that the timing status of the power timing terminal 200 is normal. When the difference between the first reference time and the second time is greater than the preset difference threshold, it indicates that the second time differs significantly from the first reference time, meaning that the power timing terminal 200 cannot obtain relatively accurate time information. Therefore, the timing status feedback unit 202 determines that the timing status of the power timing terminal 200 is abnormal.

[0066] In one embodiment of this application, when the time synchronization status feedback unit 202 determines that the time synchronization status of the power time synchronization terminal 200 is abnormal, the local time calibration mechanism of the power time synchronization terminal 200 can be activated to calibrate the second time.

[0067] In one embodiment of this application, the processing unit 201 can receive a first reference time output by a power time synchronization terminal in the upstream time synchronization network connected to the power time synchronization terminal 200 based on a first preset time interval; and obtain a second time of the power time synchronization terminal 200 based on the first preset time interval. The first preset time interval can be set according to actual needs and is not limited here. As an example and not a limitation, the processing unit 201 can receive the first reference time output by a power time synchronization terminal in the upstream time synchronization network connected to the power time synchronization terminal 200 and obtain the second time of the power time synchronization terminal 200 at several simultaneous times.

[0068] Based on this, in one implementation of this embodiment, the timing status feedback unit 202 can calculate the first difference between the first reference time and the second time obtained at the same time, and determine the average of the first differences corresponding to several different times as the difference between the first reference time and the second time.

[0069] In another implementation of this embodiment, the timing status feedback unit 202 can also calculate the first difference between the first reference time and the second time obtained at the same time, and determine the variance of the first difference corresponding to several different times as the difference between the first reference time and the second time.

[0070] In one embodiment of this application, the timing status feedback unit 202 can, upon receiving a timing status acquisition request sent by the power timing terminal in the upper-level timing network, feed back the timing status of the power timing terminal 200 to the power timing terminal in the upper-level timing network.

[0071] In another embodiment of this application, the timing status feedback unit 202 may also actively feed back the timing status of the power timing terminal 200 to the power timing terminal in the next higher-level timing network based on a second preset time interval.

[0072] The second preset time interval can be set according to actual needs, and there is no restriction here.

[0073] In this embodiment, the communication connection between the power timing terminal 200 and the power timing terminal in the next-level timing network can be established based on the Precision Time Protocol (PTP), the Network Time Protocol (NTP), or other types of power communication protocols; no limitation is imposed here.

[0074] Based on this, such as Figure 2 As shown, the power timing terminal 200 may further include a PTP / NTP interface unit 203 and a local area network (LAN) interface unit 204. Wherein:

[0075] The LAN network receiving unit 204 can receive the first reference time sent by the power timing terminal in the upper-level timing network, and transmit the first reference time to the processing unit 201 through the PTP / NTP interface unit 203; the processing unit 201 can transmit the first reference time and the second time of the power timing terminal 200 to the timing status feedback unit 202, and the timing status feedback unit 202 can feed back the second time and / or timing status of the power timing terminal 200 to the power timing terminal in the upper-level timing network through the LAN network receiving unit 204.

[0076] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of a power timing terminal provided in another embodiment of this application. Figure 3 As shown, relative to Figure 2 In a corresponding embodiment, the power timing terminal 200 in this embodiment further includes:

[0077] The BeiDou timing calculation unit 205 is connected to the BeiDou antenna 206. The BeiDou timing calculation unit 205 is used to obtain the third time of this power timing terminal from the BeiDou satellite.

[0078] Local clock unit 207 is used to provide a fourth time for this power timing terminal;

[0079] The clock discipline unit 208 is connected to the Beidou time synchronization calculation unit 205 and the local clock unit 207. The clock discipline unit 208 is used to determine the second time of this power time synchronization terminal based on the third time and / or the fourth time, and output the second time to the processing unit 201.

[0080] In this embodiment, the third time refers to the time obtained by the power timing terminal 200 from the Beidou satellite; the fourth time refers to the time provided by the local clock of the power timing terminal 200. The local clock can be a crystal oscillator or a rubidium atomic clock source, and can be set according to actual needs; no restrictions are imposed here.

[0081] In specific applications, the clock discipline unit 208 can use the third time as the second time of the power timing terminal 200; it can also use the fourth time as the second time of the power timing terminal 200; or it can calculate the second time based on the third time and the fourth time, depending on the actual situation, and there is no restriction here.

[0082] The clock discipline unit 208 can be an existing clock discipline unit.

[0083] It is understood that the power timing terminal 200 may also include a power supply unit (not shown in the figure) that supplies power to each unit in the power timing terminal 200.

[0084] As can be seen from the above, the power timing terminal provided in this embodiment, by feeding back its second time and / or timing status to the power timing terminal in the upper-level timing network with which it is communicatively connected, facilitates the power timing terminal in the upper-level timing network to send the second time and / or timing status fed back by this power timing terminal to the timing center of the upper-level timing network, and facilitates the timing center of the upper-level timing network to monitor the timing status of this power timing terminal. In turn, it can promptly notify maintenance personnel to take corresponding measures when the timing status of this power timing terminal is abnormal, thereby enhancing the time synchronization between various power timing terminals in the power timing system and improving the stability of the power timing system.

[0085] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, refer to the relevant descriptions of other embodiments.

[0086] Those skilled in the art will recognize that the units of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0087] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A power time synchronization system, comprising a grid-level time synchronization network, a provincial-level time synchronization network, and a city-level time synchronization network, wherein the grid-level time synchronization network is the next higher level time synchronization network of the provincial-level time synchronization network, and the provincial-level time synchronization network is the next higher level time synchronization network of the city-level time synchronization network; each level time synchronization network comprises multiple power time synchronization terminals; characterized in that, A power time synchronization terminal in a lower-level time synchronization network receives a first reference time output by a power time synchronization terminal in a higher-level time synchronization network with which it is communicatively connected, and the power time synchronization terminal in the lower-level time synchronization network feeds back its second time to the power time synchronization terminal in the higher-level time synchronization network with which it is communicatively connected; the power time synchronization terminal in the higher-level time synchronization network sends the second times fed back by each power time synchronization terminal in the lower-level time synchronization network with which it is communicatively connected to the time synchronization center of the higher-level time synchronization network; the time synchronization center in each level of the time synchronization network is used to determine whether the time synchronization function of each power time synchronization terminal in the current level of the time synchronization network and / or each power time synchronization terminal in the lower-level time synchronization network is normal based on the first reference time output by each power time synchronization terminal in the current level of the time synchronization network and the second time fed back by each power time synchronization terminal in the lower-level time synchronization network, thereby realizing the monitoring of the time synchronization status of each power time synchronization terminal.

2. The power timing system according to claim 1, characterized in that, The time synchronization status is determined by the power time synchronization terminal in the next-level time synchronization network based on the difference between the first reference time and the second time.

3. The power timing system according to claim 2, characterized in that, When the power timing terminal in the next-level timing network detects that the difference between the first reference time and the second time is less than or equal to a preset difference threshold, it determines that the timing status is normal.

4. The power timing system according to claim 2, characterized in that, When the power time synchronization terminal in the next-level time synchronization network detects that the difference between the first reference time and the second time is greater than a preset difference threshold, it determines that the time synchronization status is abnormal.

5. The power timing system according to any one of claims 1 to 4, characterized in that, The communication connection between the power time synchronization terminal in the next-level time synchronization network and the power time synchronization terminal in the previous-level time synchronization network is established based on a high-precision time synchronization protocol or a network time protocol.

6. A power time synchronization terminal, characterized in that, include: The processing unit is used to receive a first reference time output by a power time synchronization terminal in the upper-level time synchronization network that is communicatively connected to this power time synchronization terminal, and to acquire a second time from this power time synchronization terminal. A timing status feedback unit, connected to the processing unit, is used to receive the first reference time and the second time output by the processing unit, determine the timing status of the current power timing terminal based on the first reference time and the second time, and feed back the second time to the power timing terminals in the next-level timing network, so that the power timing terminals in the next-level timing network send the second time fed back by each power timing terminal in the next-level timing network to the timing center of the next-level timing network; the timing center in each level of the timing network is used to determine whether the timing function of each power timing terminal in the current level of the timing network and / or each power timing terminal in the next-level timing network is normal based on the first reference time output by each power timing terminal in the current level of the timing network and the second time fed back by each power timing terminal in the next-level timing network, thereby realizing the monitoring of the timing status of each power timing terminal.

7. The power timing terminal according to claim 6, characterized in that, The timing status feedback unit is specifically used to: determine the timing status based on the difference between the first reference time and the second time.

8. The power timing terminal according to claim 7, characterized in that, The time synchronization status feedback unit is specifically used to: determine that the time synchronization status is normal when the difference between the first reference time and the second time is less than or equal to a preset difference threshold.

9. The power timing terminal according to claim 7, characterized in that, The timing status feedback unit is specifically used to: determine that the timing status is an abnormal state when the difference between the first reference time and the second time is greater than a preset difference threshold.

10. The power timing terminal according to any one of claims 6 to 9, characterized in that, Also includes: The BeiDou time synchronization calculation unit is connected to the BeiDou antenna. The BeiDou time synchronization calculation unit is used to obtain the third time of this power time synchronization terminal from the BeiDou satellite. The local clock unit is used to provide a fourth time for this power timing terminal; The clock discipline unit is connected to the BeiDou time synchronization calculation unit and the local clock unit. The clock discipline unit is used to determine the second time of the power time synchronization terminal based on the third time and / or the fourth time, and output the second time to the processing unit.

Images