CN114665450A - Data processing method and device for power distribution network differential protection service - Google Patents
Data processing method and device for power distribution network differential protection service Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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Abstract
The application provides a data processing method and a data processing device for a power distribution network differential protection service, which are applied to a first client front-end device as a sending end and comprise the following steps: receiving current fault component data to be communicated from a first protection device; comparing the current fault component data with a preset standard data packet to obtain at least one change data; obtaining a target data packet based on the at least one change data; and sending the target data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet. Wherein, because the target data packet includes the changed data and does not include the unchanged data, the data amount is smaller relative to the total data in the current fault component data. Thus, the data traffic transmitted by the wireless network is reduced during the transfer.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a data processing method and apparatus for a power distribution network differential protection service.
Background
With the development of industrial technology and the improvement of life quality of people, the society has higher requirements on the reliability of power supply, and the traditional single-ended power distribution open-loop operation mode has lower power supply reliability and is difficult to meet the requirements of users. And the closed-loop operation mode of the power distribution network is more suitable for friendly access of distributed power sources, the power distribution network is more advantageous in the aspect of improving the quality of electric energy, and more areas start to adopt a novel closed-loop operation mode of the power distribution network in succession.
With the large-scale development and utilization of solar energy and wind energy in China, the capacity of a power supply represented by photovoltaic and wind power accounts for a larger and larger proportion in a power distribution network. And as more and more different types of power supplies are connected to the power distribution network, the power grid is also changed from the original radiation type network to a complex multi-source and multi-terminal network. The traditional current three-section type protection is not applicable any more, and the differential protection originally used in a large scale of a transmission network is applied to a power distribution network due to the absolute selectivity of the fault.
Fig. 1 is a block diagram of a network for implementing differential protection by using wireless communication technology, which includes protection devices a and B, CPE (Customer Premise Equipment) 1 and CPE2, and a wireless network. The protection device A is directly connected with the CPE1 through a network cable, the protection device B is directly connected with the CPE2 through the network cable, and the CPE1 and the CPE2 perform data interaction through a wireless network.
However, in the prior art, a protection terminal generally works in a full traffic mode, protection data acquired by a protection device in real time is sent to an opposite-end protection device at a rate of approximately 5M bps (bit per second), UDP (User Datagram Protocol) communication is used, the length of each UDP packet is approximately 300 bytes, and the data load in the UDP packet is approximately 250 bytes. In this mode, the single terminal is nearly 5M bps, and the 1 hour traffic is nearly 20G, so the consumed data traffic is huge.
Disclosure of Invention
In view of this, the present application provides a data processing method for a power distribution network differential protection service, which includes:
a data processing method for power distribution network differential protection service, the method being applied to a first customer premises equipment, the method comprising:
receiving current fault component data to be communicated from a first protection device;
comparing the current fault component data with a preset standard data packet to obtain at least one change data;
obtaining a target data packet based on the at least one change data;
and sending the target data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet.
Optionally, in the method, obtaining the target data packet based on the change data includes:
combining the at least one change data with position information of the at least one change data in the current fault component data to obtain combined information;
and obtaining a target data packet based on the combined information.
Optionally, in the method, after the obtaining the combination information, the method further includes:
judging whether the first data volume of the combined information is smaller than the second data volume of the current fault component data or not to obtain a judgment result;
and representing that the first data volume is smaller than the second data volume based on the judgment result, and obtaining a target data packet based on the combination information.
Optionally, after obtaining the target data packet based on the combination information, the method further includes:
and updating the information of the target position in the target data packet into a preset compression identifier.
Optionally, before receiving the current fault component data to be transmitted from the first protection device, the method further includes:
determining a standard data packet at intervals of a preset number of data packets;
and sending the standard data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the standard data packet and the target data packet.
Optionally, the method further includes:
and receiving a response data packet fed back by the second customer premise equipment of the opposite terminal, wherein the response data packet indicates that the second customer premise equipment receives the standard data packet.
A data processing method for a power distribution network differential protection service is applied to a second customer premises equipment, and comprises the following steps:
receiving a target data packet sent by a first client front-end device;
analyzing the target data packet to obtain at least one change data;
combining the at least one change data with a preset standard data packet to obtain circuit fault component data;
sending the current fault component data to a second protection device.
Optionally, the method further includes:
receiving standard data packets sent by a first client front-end device, wherein a preset number of data packets are arranged between any two adjacent standard data packets at intervals;
and generating a response data packet for the standard data packet, wherein the response data packet carries a preset compression identifier, and the preset compression identifier is used for agreeing with the identifier of the target data packet with the first client front-end device.
A data processing apparatus for a power distribution network differential protection service, the apparatus being applied to a first customer premises equipment, comprising:
the first receiving module is used for receiving the current fault component data to be transmitted from the first protection device;
the comparison module is used for comparing the current fault component data with a preset standard data packet to obtain at least one change data;
the first processing module is used for obtaining a target data packet based on the at least one change data;
and the first sending module is used for sending the target data packet to the second customer premise equipment so that the second customer premise equipment obtains the current fault component data based on the target data packet.
A data processing apparatus for power distribution network differential protection service, the apparatus being applied to a second customer premises equipment, comprising:
the second receiving module is used for receiving a target data packet sent by the first customer premise equipment;
the second processing module is used for processing the target data packet to obtain at least one piece of change data, and combining the at least one piece of change data with a preset standard data packet to obtain circuit fault component data;
and the second sending module is used for sending the current fault component data to a second protection device.
As can be seen from the foregoing technical solutions, the present application provides a data processing method for a power distribution network differential protection service, where the method is applied to a first customer premises equipment as a sending end, and includes: receiving current fault component data to be communicated from a first protection device; comparing the current fault component data with a preset standard data packet to obtain at least one change data; obtaining a target data packet based on the at least one change data; and sending the target data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet. Wherein, because the target data packet includes the changed data but not the unchanged data, the data amount is smaller relative to all the data in the current fault component data. Thus, the data traffic transmitted by the wireless network is reduced during the transfer.
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In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the prior art and the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a block diagram of a network implementing differential protection using wireless communication techniques;
fig. 2 is a flowchart of a data processing method 1 of a power distribution network differential protection service provided in the present application;
fig. 3 is a flowchart of an embodiment 2 of a data processing method for a power distribution network differential protection service provided in the present application;
fig. 4 is a flowchart of a data processing method embodiment 3 of a power distribution network differential protection service provided in the present application;
fig. 5 is a flowchart of a data processing method 4 of a power distribution network differential protection service provided in the present application;
fig. 6 is a schematic diagram of a target data packet in an embodiment 4 of a data processing method for a power distribution network differential protection service provided by the present application;
fig. 7 is a flowchart illustrating a normal data packet in an embodiment 4 of a data processing method for a power distribution network differential protection service according to the present application;
fig. 8 is a flowchart of an embodiment 5 of a data processing method for a power distribution network differential protection service according to the present application;
fig. 9 is a flowchart of a data processing method of a power distribution network differential protection service according to embodiment 6 of the present application;
fig. 10 is a schematic diagram of a response packet in an embodiment 6 of a data processing method for a power distribution network differential protection service according to the present application;
fig. 11 is a flowchart of an embodiment 7 of a data processing method for a power distribution network differential protection service according to the present application;
fig. 12 is a flowchart of an embodiment 8 of a data processing method for a power distribution network differential protection service according to the present application;
fig. 13 is a schematic structural diagram of an embodiment 1 of a data processing apparatus for power distribution network differential protection service provided in the present application;
fig. 14 is a schematic structural diagram of an embodiment 2 of a data processing device for power distribution network differential protection service provided in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Differential protection: the differential protection is a current vector difference between two ends of an input CT (current transformer), and when a set action value is reached, an action element is started, so that the purpose of protecting equipment (such as a circuit, a generator, a motor, a transformer and the like) between the two ends of the input CT is achieved. Therefore, it is necessary to compare the current information detected by the two-terminal differential protection device.
It should be noted that the wireless communication technology is applied to the general principle of the distributed differential protection method of the power distribution network: the method comprises the steps that a digital protection device is used for carrying out overcurrent detection on currents at two ends of a power distribution network line in real time, respective overcurrent moments are used as synchronous references of the digital protection device at the two ends of the line, once overcurrent is detected, the digital protection device is started and sends a starting signal to an opposite end, after the digital protection device is started, a current fault component value after fault starting is calculated, and current fault component data are sent to the opposite end after the calculation is finished; when the digital protection devices transmit signals, the digital protection devices communicate by using a communication channel based on a wireless network, so that data interaction of the two digital protection devices is realized; the digital protection devices are respectively connected to the corresponding wireless terminals, and the virtual server is arranged in the wireless terminal, so that the data of the digital protection device connected with the wireless terminal at the opposite end can be forwarded to the digital protection device at the local end, and the data interaction of the two digital protection devices is realized. In the scheme, the protection device of the sending end sends the electric quantity fault component data to the second customer premise equipment of the receiving end through the first customer premise equipment, and data interaction is carried out between the first customer premise equipment and the second customer premise equipment through a communication channel of a wireless network.
It should be noted that, in the present application, two protection devices send UDP (User Datagram Protocol) packets, and the UDP packets sent by the protection devices in real time have a characteristic that the UDP data portions of two frames before and after the protection devices do not change much, and generally have a change of about 24 bytes according to analysis of data collected by a power distribution network differential protection field. If CPE only transmits the change part per frame (each data packet), the position point and value of the change data are transmitted, the load length of each UDP packet is 24 x 2-48 bytes, and the 4 bytes of the compression head used for marking simplified processing are added, the total load of UDP is 52 bytes, the original 250 bytes are reduced to 52 bytes, the previous 20G flow is reduced to about 4G per hour, and the data flow transmitted in the wireless network is greatly saved. This is the basis for data compression.
As shown in fig. 2, a flowchart of an embodiment 1 of a data processing method for a power distribution network differential protection service provided by the present application is applied to a first customer premise equipment CPE, where the first customer premise equipment is a customer premise equipment corresponding to a protection device serving as a data sending end, and the method includes the following steps:
step S201: receiving current fault component data to be communicated from a first protection device;
it should be noted that, in the present application, reference is made to a network block diagram shown in fig. 1 for a system to which a client front-end device and a protection device belong, where a first protection device in this embodiment is a protection device serving as a data sending end, and a corresponding first client front-end device is a device belonging to the same side as the first protection device.
For example, the first protection device is protection device a in fig. 1, and accordingly, the first customer premises equipment is CPE 1; the first protection device is protection device B in fig. 1, and accordingly, the first customer premises equipment is CPE 2.
And because the two-end protection device of the system carries out real-time overcurrent detection on the current of the power distribution network line at the end where the protection device is located, and after the overcurrent is detected and a starting signal is sent to the opposite end, the current fault component value after fault starting is calculated, and the calculated current fault component data is sent to the opposite end. Therefore, in the present application, a description will be given taking as an example any client front-end device on the side of the protection device on the data transmission side.
The first protection device carries out overcurrent detection on the current at two ends of the power distribution network line in real time, calculates the current fault component value after the fault starting according to the detected filtering condition, obtains current fault component data, and sends the current fault component data to the first client front-end equipment.
Step S202: comparing the current fault component data with a preset standard data packet to obtain at least one change data;
wherein, the standard data packet data is preset, and the current fault component data is compared with the standard data packet data to obtain the change data of the current fault component data relative to the standard data packet data.
For example, a standard packet of 20 bytes is: 01234567890123456789, and the current fault component value to be transmitted is 20 bytes: 11234567890123456789, comparing the two data packets to obtain the difference between the first byte and the standard data packet, and determining that the changed value is 1 of the first position.
Step S203: obtaining a target data packet based on the at least one change data;
based on the determined change data, a target data packet is obtained.
Wherein the target data packet includes the changed data but not the unchanged data, and the data amount is smaller than the total data in the current fault component data.
It should be noted that, adding an IP (Internet Protocol) header and a UDP header to the at least one changed data to obtain the target data packet.
The IP header typically occupies 20 bytes, including one or more of a version, a header length, a service type, a total length field, a flag bit field, an original IP address, a target IP address field, and so forth.
The UDP header typically occupies 8 bytes, including one or more of a source port number, a destination port number, a UDP length, a UDP checksum, and the like.
The IP header and the UDP header are structures necessary for transmitting a UDP packet between two client front-end devices.
Step S204: and sending the target data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet.
And transmitting the target data packet to the second client front-end device based on the wireless network, wherein the transmitting process uses less data traffic due to the smaller data volume of the target data packet relative to the current fault component data to be transmitted.
It should be noted that, after receiving the target data packet, the second client front-end device processes and restores the current fault component data, and sends the restored current fault component data to the second protection device, so that the current fault component data is finally transmitted between the two protection devices, and it is ensured that the data traffic used in the sending process is less.
In summary, the data processing method for the power distribution network differential protection service provided in this embodiment is applied to a first customer premises equipment as a sending end, and includes: receiving current fault component data to be communicated from a first protection device; comparing the current fault component data with a preset standard data packet to obtain at least one change data; obtaining a target data packet based on the at least one change datum; and sending the target data packet to the second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet, wherein the target data packet comprises changed data and does not comprise unchanged data, and the data volume is smaller relative to all data in the current fault component data. Thus, the data traffic transmitted by the wireless network is reduced during the transfer.
As shown in fig. 3, a flowchart of an embodiment 2 of a data processing method for a power distribution network differential protection service provided by the present application is provided, where the method includes the following steps:
step S301: receiving current fault component data to be communicated from a first protection device;
step S302: comparing the current fault component data with a preset standard data packet to obtain at least one change data;
steps S301 to 302 are the same as steps S201 to 202 in embodiment 1, and are not described in detail in this embodiment.
Step S303: combining the at least one change data with position information of the at least one change data in the current fault component data to obtain combined information;
after comparing the current fault component data with the standard data packet data, determining the change data of the current fault component data relative to the standard data packet, and knowing the position of the change data in the current fault component data.
Specifically, the position information of the change data expected in the current fault component data is combined in sequence to obtain at least two groups of combined information.
For example, the standard packet is 240 bytes long, the content is all 0xA0{0xA0,0xA0,0xA0.. and 0xA0}, at a certain time, the content of the service packet sent by the first protection device received by the first client front end device is {0xA0,0xB0,0xB0,0xA0.. and 0xA0}, and only the 2 nd and 3 rd bytes of data are changed to 0xB 0. CPE1 compares this packet with the stored standard packet, and sends the destination packet {2, 0xB0, 3, 0xB0} except that the 2 nd and 3 rd bytes of data change to 0xB 0.
In this embodiment, the arrangement mode of position information before and change data after is not limited to this in specific implementation, and a mode of position information before and after change data may be adopted, or a mode of arranging all change data before and after list position information may be adopted, and the like.
Step S304: obtaining a target data packet based on the combined information;
specifically, the target data packet can be obtained by compressing the combination information.
For example, if the combination information is 1155, the destination packet is obtained based on 1155.
It should be noted that, the second client front-end device at the opposite end obtains the combination information by analyzing the target data packet, and obtains the current fault component data by restoring based on the position information and the change data in the combination information.
Specifically, an IP header and a UDP header are added before the combined information to obtain the target packet.
Step S305: and sending the target data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet.
Step S305 is the same as step S204 in embodiment 1, and is not described in detail in this embodiment.
In summary, in the data processing method for the power distribution network differential protection service provided in this embodiment, the obtaining a target data packet based on the change data includes: combining the at least one change data with position information of the at least one change data in the current fault component data to obtain combined information; and obtaining a target data packet based on the combined information. In the scheme, the change data and the position information of the change data in the circuit fault component data are combined and then processed to obtain the target data packet, so that the second customer premises equipment at the opposite end restores to obtain the circuit fault component data based on the position information and the change data.
As shown in fig. 4, a flowchart of an embodiment 3 of a data processing method for a power distribution network differential protection service provided in the present application is provided, where the method includes the following steps:
step S401: receiving current fault component data to be communicated from a first protection device;
step S402: comparing the current fault component data with a preset standard data packet to obtain at least one change data;
step S403: combining the at least one change data with position information of the at least one change data in the current fault component data to obtain combined information;
steps S401 to 403 are the same as steps S301 to 303 in embodiment 2, and are not described in detail in this embodiment.
Step S404: judging whether the first data volume of the combined information is smaller than the second data volume of the current fault component data or not to obtain a judgment result;
after the combination information is obtained, the magnitude relation between the data amount of the combination information (i.e., the first data amount) and the data amount of the current fault component data itself (i.e., the second data amount) is determined.
When the first data volume is smaller than the second data volume, the data flow required by the transmission of the target data packet obtained by the combined information is smaller than the data flow required by the transmission of the current fault component data; otherwise, the data flow required for transmitting the target data packet is not less than the data flow required for transmitting the current fault component data.
It should be noted that the position information of the change data in the current fault component data is represented by a numerical value, for example, if the numerical value of the first position is changed to 5, the combination information is 15,.
The combined information includes the changed data and the value representing the position of the changed data, the combined data and the changed data form a new data frame, the total length of the data frame is less than that of the original circuit fault component data frame, and the data flow rate required by sending the combined information is less than that of the data frame.
In a specific implementation, after at least one change data, a process of determining whether the number of the change data is greater than half of the current fault component data to determine whether to obtain a target data packet based on the change data is performed. This is because, if the number of change data is greater than half of the current fault component data, and the total length of the combined data obtained based on the change data and the position thereof is certainly not less than the total length of the circuit fault component data frame, and the purpose of reducing the data traffic cannot be achieved, the step of determining the position and combination of the change data does not need to be performed, and the data processing load of the first customer premises equipment is reduced.
Therefore, when the first data amount is smaller than the second data amount, the subsequent steps of obtaining the target data packet based on the combination information and transmitting the target data packet to the second client front-end device are performed.
It should be noted that, when the first data amount of the combined information is greater than or equal to the second data amount, the purpose of transferring the combined information to reduce the data traffic cannot be achieved, and the current fault component data may be directly sent to the client front-end device on the opposite end, so as to reduce the burden of restoring data on the opposite end.
Step S405: representing that the first data volume is smaller than the second data volume based on the judgment result, and obtaining a target data packet based on the combined information;
step S406: and sending the target data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet.
Steps S405 to 406 are the same as steps S304 to 305 in embodiment 2, and are not described in detail in this embodiment.
In summary, in the data processing method for the power distribution network differential protection service provided in this embodiment, when a first data amount of the combination information is smaller than a second data amount of the current fault component data, the combination information is processed to obtain a target data packet, so as to reduce data traffic transmitted by the wireless network.
As shown in fig. 5, a flowchart of an embodiment 4 of a data processing method for a power distribution network differential protection service provided in the present application is provided, where the method includes the following steps:
step S501: receiving current fault component data to be communicated from a first protection device;
step S502: comparing the current fault component data with a preset standard data packet to obtain at least one change data;
step S503: combining the at least one change data with position information of the at least one change data in the current fault component data to obtain combined information;
step S504: obtaining a target data packet based on the combined information;
steps S501 to 504 are the same as steps S301 to 304 in embodiment 2, and are not described in detail in this embodiment.
Step S505: updating the information of the target position in the target data packet into a preset compression identifier;
and adding a compression identifier at the tail part of the data packet to represent that the data in the target data packet is subjected to simplified compression processing.
The compression identification of the data packet of which the data is not subjected to the simplified compression processing is different from the compression identification of the data packet of which the data is subjected to the simplified compression processing.
For example, the compression flag of the data packet whose data has not been subjected to the simplified compression processing is 0, and the compression flag of the data packet subjected to the simplified compression processing is data other than 0.
It should be noted that, after receiving the data, the second client front-end device determines whether the data is a target data packet whose data is subjected to simplified compression processing based on the information of the target position in the target data packet, and if the data is the target data, removes the compression identifier and processes the data, and restores the data to be current fault component data; otherwise, the data packet is not subjected to simplified compression processing, and the data packet is sent to a subsequent second protection device after the compression identifier is removed, so that the data transmission efficiency between the second client front-end device and the second protection device is improved.
Fig. 6 is a schematic diagram of a target packet, in which data is subjected to a reduction compression process, the target packet includes an IP header, a UDP header, data, and a compression flag, where the compression flag is P _ flag ═ 0x5a5a5a5 a.
Fig. 7 is a schematic diagram of a normal data packet, in which data in the normal data packet is not subjected to the reduction compression process, and includes an IP header, a UDP header, data, and a compression flag, where the compression flag is P _ flag ═ 0.
Step S506: and sending the target data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet.
Step S506 is the same as step S305 in embodiment 2, and details are not described in this embodiment.
In summary, in the data processing method for the power distribution network differential protection service provided in this embodiment, after the current fault component data is subjected to the simplification compression processing to obtain the target data packet, the information of the target position in the target data packet is updated to be the preset compression identifier, so that the client front-end device at the opposite end determines that the received data packet is subjected to the simplification compression processing based on the preset compression identifier, and then the data packet is processed and restored to obtain the circuit fault component data, thereby increasing the data transmission efficiency between the second client front-end device and the second protection device.
As shown in fig. 8, a flowchart of an embodiment 5 of a data processing method for a power distribution network differential protection service provided in the present application is provided, where the method includes the following steps:
step S801: receiving current fault component data to be communicated from a first protection device;
step S801 is the same as step S201 in embodiment 1, and details are not described in this embodiment.
Step S802: determining a standard data packet by spacing a preset number of data packets;
because the amount of the data packets sent by the differential protection service is large, in order to ensure the accuracy of simplification and restoration, a standard data packet is sent to the opposite terminal every other preset frame.
Specifically, the standard data packet may be the current fault component data to be transmitted directly by using the first protection device, so as to reduce the data processing amount of the first customer premises equipment.
The first client front-end equipment counts once each frame of current fault component data is received from the first protection device, counts the number of times of the received data, and determines a standard data packet when the number of times reaches a set value.
For example, one standard packet is transmitted every 1000 packets, and the 1 st, 1001 st, and 2001 … th packets are determined as standard packets.
Of course, the number of the intervals of the preset data packets may be determined according to practical situations, and is not limited to the number in the embodiment.
It should be noted that, after determining and transmitting the standard packet, the first client front-end device also stores the standard packet locally (updates the previously stored standard packet based on the latest standard packet) for use in subsequently determining the changed data.
And because the first customer premises equipment directly sends the whole data of the standard data packet to the opposite terminal, the information of the target position in the data packet is set as the specific identification of the standard data packet.
The specific identifier of the standard data packet is different from the compression identifier of the data packet whose data is not subjected to the simplified compression processing and the compression identifier of the data packet whose data is subjected to the simplified compression processing.
The structure of the standard packet can refer to the packet shown in fig. 7.
It should be noted that, the difference of data in the data packets is not large in a period of time, but if the interval time is long, the difference may be large, or the standard data packets stored in the first customer premises equipment or the second customer premises equipment at the opposite end are damaged, so that a standard data packet is determined and sent to the second customer premises equipment at the opposite end at intervals of a preset number of data packets, so as to agree with the standard data packet, and it is ensured that the current fault component data transmitted by the protection devices at both ends can be accurately transmitted.
Step S803: sending the standard data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the standard data packet and a target data packet;
and the second client front-end equipment determines that the data packet is a standard data packet based on the information of the target position in the received data packet, and stores the standard data so as to restore the combined information in the subsequently received target data packet to obtain the current fault component data.
Step S804: comparing the current fault component data with a preset standard data packet to obtain at least one change data;
step S805: obtaining a target data packet based on the at least one change data;
step S806: and sending the target data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet.
Steps S804 to 806 are the same as steps S202 to 204 in embodiment 1, and are not described in detail in this embodiment.
In summary, in the data processing method for the power distribution network differential protection service provided in this embodiment, the method further includes: determining a standard data packet at intervals of a preset number of data packets; and sending the standard data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the standard data packet and the target data packet. In the scheme, a standard data packet is determined at intervals of a preset number of data packets, and the standard data packet is sent to the customer premise equipment of the opposite terminal, so that the standard data packet is defined with the opposite terminal.
As shown in fig. 9, a flowchart of an embodiment 6 of a data processing method for a power distribution network differential protection service provided in the present application is provided, where the method includes the following steps:
step S901: receiving current fault component data to be communicated from a first protection device;
step S902: determining a standard data packet at intervals of a preset number of data packets;
step S903: sending the standard data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the standard data packet and a target data packet;
steps S901 to 903 are the same as steps S801 to 803 in embodiment 5, and are not described in detail in this embodiment.
Step S904: receiving a response data packet fed back by the second customer front-end device of the opposite terminal;
wherein the response packet indicates that the second customer premises equipment received the standard packet.
After receiving the standard data packet, the second client front-end device at the opposite end generates a feedback response data packet for the standard data packet, and the response data packet prompts the first client front-end device that the first client front-end device has received the standard data packet, so as to realize subsequent simplification and compression processing of current fault component data based on the standard data packet.
The response data packet carries an agreed preset compression identifier, so that the first client front-end device adds the preset compression identifier to a target position when generating a target data packet.
Fig. 10 is a schematic diagram of a response packet, which includes an IP header, a UDP header, data, and a contract identifier, where the contract identifier is P _ flag is 0x5a5a5a5 a.
It should be noted that, since there is a time difference between the transmission of the standard packet by the first client front-end device and the reception of the response packet fed back by the second client front-end device, the UDP packet transmitted by the first client front-end device has the current fault component data as a whole in the content of the time difference, and the simplified compression process is not performed to ensure the accuracy of data transmission.
Step S905: comparing the current fault component data with a preset standard data packet to obtain at least one change data;
step S906: obtaining a target data packet based on the at least one change data;
step S907: and sending the target data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet.
Wherein steps S905-907 are the same as step 804-806 in embodiment 8, and are not described in detail in this embodiment.
In summary, in the data processing method for the power distribution network differential protection service provided in this embodiment, the method further includes: and receiving a response data packet fed back by the second customer premises equipment of the opposite terminal, wherein the response data packet indicates that the second customer premises equipment receives the standard data packet. In the scheme, after the standard data packet is sent to the opposite terminal, the response data packet fed back by the opposite terminal device is received to determine that the opposite terminal device receives the standard data packet, and subsequent simplification compression processing of current fault component data can be performed based on the standard data packet to reduce data traffic required by data transmission between two customer front-end devices.
As shown in fig. 11, a flowchart of an embodiment 7 of a data processing method for power distribution network differential protection service provided in the present application is applied to a second customer premise equipment CPE, where the second customer premise equipment is a customer premise equipment corresponding to a protection device at a data receiving end, and the method includes the following steps:
step S1101: receiving a target data packet sent by a first customer premise equipment;
the method comprises the steps of receiving a target data packet sent by a first client front-end device of an opposite terminal through a wireless network.
Wherein, the data in the target data packet is the data which is subjected to the simplified compression.
Step S1102: processing the target data packet to obtain at least one change data;
and processing the target data packet to obtain the change data carried in the target data packet.
The second client front-end device firstly determines that the received data packet is the target data packet based on the preset compression identifier of the target position, and triggers the subsequent step S1103 after deleting the data of the target position, otherwise, directly deletes the preset compression identifier, and sends the data packet to the second protection device.
Step S1103: combining the at least one change data with a preset standard data packet to obtain circuit fault component data;
the change data is combined with a preset standard data packet, specifically, data of a corresponding position in the standard data packet is replaced based on the position of the change data in the current fault component data, and the current fault component data sent to the first client front-end device by the first protection device is restored.
For example, the data in a standard packet is: 01234567890123456789, the data in the target data packet is 1157, the data of the 1 st bit is determined to be 1, the data of the 5 th bit is 7, the obtained current fault component data is 11237567890123456789 of 20 bytes based on the standard data packet and the change data, and the recovery of the current fault component data is realized.
Step S1104: sending the current fault component data to a second protection device.
And the second customer premise equipment sends the restored current fault component data to the corresponding second protection device so that the second protection device can perform subsequent response.
It should be noted that the current fault component data received by the second protection device is the same as the current fault component data output by the first protection device, and on the premise of ensuring accurate data transmission, the data flow transmitted by the wireless network is reduced.
In summary, in the data processing method for the power distribution network differential protection service provided in this embodiment, the second customer premises equipment at the receiving end processes the target data packet received by the second customer premises equipment in combination with the standard data packet, and restores the current fault component data, where the target data packet includes changed data in the current fault component data, but does not include unchanged data, and the data size is smaller than that of all data in the current fault component data. Thus, the data traffic transmitted by the wireless network is reduced during the transfer.
As shown in fig. 12, a flowchart of an embodiment 8 of a data processing method for a power distribution network differential protection service provided in the present application is provided, where the method includes the following steps:
step S1201: receiving a standard data packet sent by a first customer premise equipment;
and a preset number of data packets are arranged between any two adjacent standard data packets at intervals.
And receiving a standard data packet sent by the first client front-end device through a wireless network, wherein the standard data packet is a standard required for unified simplification and restoration between the second client front-end device and the first client front-end device.
After receiving the data packet, the second client front-end device detects the identification content of the target position, if the identification content is the identification of the appointed standard data packet, the second client front-end device determines that the data packet is the standard data packet, stores the standard data packet so as to process the subsequently received target data packet based on the standard data packet, and restores the current fault component data.
Step S1202: generating a response packet to the standard packet;
the response data packet carries a preset compression identifier, and the preset compression identifier is used for agreeing with the identifier of the target data packet with the first client front-end device;
and generating a response data packet for the standard data packet, so that the first client front-end device of the opposite end determines to be capable of performing data reduction compression and then transferring with the second client front-end device based on the response data packet.
The first client front-end device sets the preset compression identifier at a target position in a subsequently generated target data packet after receiving the response data packet.
The second client front-end device generates and replies a response data packet when data is to be sent to the first client front-end device, so as to ensure that a data transmission route between the second client front-end device and the first client front-end device is maintained.
Step S1203: receiving a target data packet sent by a first customer premise equipment;
step S1204: processing the target data packet to obtain at least one change data;
step S1205: combining the at least one change data with a preset standard data packet to obtain circuit fault component data;
step S1206: sending the current fault component data to a second protection device.
Wherein steps S1203-1206 are the same as steps 1101-1104 in embodiment 7, and are not described in detail in this embodiment.
In summary, in the data processing method for the power distribution network differential protection service provided in this embodiment, the method further includes: receiving standard data packets sent by a first client front-end device, wherein a preset number of data packets are arranged between any two adjacent standard data packets at intervals; and generating a response data packet for the standard data packet, wherein the response data packet carries a preset compression identifier, and the preset compression identifier is used for agreeing with the identifier of the target data packet with the first client front-end device. In the scheme, after a standard data packet sent by a first client front-end device is received, a response data packet is generated and carries a preset compression identifier, so that the identifier of a target data packet agreed with an opposite client front-end device is realized, and a basis is provided for subsequent target data packet processing.
Corresponding to the embodiment of the data processing method for the power distribution network differential protection service provided by the application, the application also provides an embodiment of a device for applying the data processing method for the power distribution network differential protection service.
Fig. 13 is a schematic structural diagram of an embodiment 1 of a data processing apparatus for power distribution network differential protection service provided in the present application, where the apparatus is applied to a first customer premises equipment as a transmitting end, and the apparatus includes the following structures: a first receiving module 1301, a comparing module 1302, a first processing module 1303 and a first sending module 1304;
the first receiving module 1301 is configured to receive current fault component data to be transmitted from a first protection device;
the comparison module 1302 is configured to compare the current fault component data with a preset standard data packet to obtain at least one change data;
the first processing module 1303 is configured to obtain a target data packet based on the at least one change data;
the first sending module 1304 is configured to send the target data packet to the second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet.
Optionally, the first processing module includes:
the combination unit is used for combining the at least one change data with the position information of the at least one change data in the current fault component data to obtain combination information;
and the processing unit is used for obtaining the target data packet based on the combined information.
Optionally, the first processing module further includes:
the judging unit is used for judging whether the first data volume of the combined information is smaller than the second data volume of the current fault component data or not to obtain a judging result;
and characterizing that the first data volume is smaller than the second data volume based on the judgment result, and triggering a processing unit.
Optionally, the first processing module further includes:
and the identification unit is used for updating the information of the target position in the target data packet into a preset compression identification.
Optionally, the method further includes:
the determining module is used for determining a standard data packet by separating a preset number of data packets;
the first sending module is further configured to send the standard packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the standard packet and a target packet.
Optionally, the first receiving module is further configured to receive a response packet fed back by the second client front-end device of the opposite end, where the response packet indicates that the second client front-end device receives the standard packet.
In summary, the data processing apparatus for power distribution network differential protection service provided in this embodiment is applied to a first customer premises equipment, and includes: the first receiving module is used for receiving the current fault component data to be transmitted from the first protection device; the comparison module is used for comparing the current fault component data with a preset standard data packet to obtain at least one change data; the first processing module is used for obtaining a target data packet based on the at least one change data; and the first sending module is used for sending the target data packet to the second client front-end device so that the second client front-end device obtains the current fault component data based on the target data packet. . Wherein, because the target data packet includes the changed data and does not include the unchanged data, the data amount is smaller relative to the total data in the current fault component data. Thus, the data traffic transmitted by the wireless network is reduced during the transfer.
Fig. 14 is a schematic structural diagram of an embodiment 2 of a data processing apparatus for power distribution network differential protection service provided in the present application, where the apparatus is applied to a second customer premises equipment as a receiving end, and the apparatus includes the following structures: a second receiving module 1401, a second processing module 1402 and a second transmitting module 1403;
the second receiving module 1401 is configured to receive a target data packet sent by the first client front-end device;
the second processing module 1402 is configured to process the target data packet to obtain at least one change data, and combine the at least one change data with a preset standard data packet to obtain circuit fault component data;
wherein the second sending module 1403 is configured to send the current fault component data to a second protection device.
Optionally, the second receiving module is further configured to receive a standard data packet sent by the first client front-end device, where a preset number of data packets are spaced between any two adjacent standard data packets;
the device also includes:
and the response module is used for generating a response data packet for the standard data packet, wherein the response data packet carries a preset compression identifier, and the preset compression identifier is used for agreeing with the identifier of the target data packet with the first client front-end device.
In summary, in the data processing apparatus for power distribution network differential protection service provided in this embodiment, the apparatus is applied to a second customer premises equipment, and includes: the receiving module is used for receiving a target data packet sent by the first client front-end device; the second processing module is used for processing the target data packet to obtain at least one piece of change data, and combining the at least one piece of change data with a preset standard data packet to obtain circuit fault component data; and the second sending module is used for sending the current fault component data to a second protection device. And the second client front-end equipment at the receiving end processes the received target data packet in combination with the standard data packet, restores the current fault component data, and has smaller data volume relative to all data in the current fault component data because the target data packet comprises the changed data in the current fault component data but does not comprise unchanged data. Thus, the data traffic transmitted by the wireless network is reduced during the transfer.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the device provided by the embodiment, the description is relatively simple because the device corresponds to the method provided by the embodiment, and the relevant points can be referred to the method part for description.
The previous description of the provided embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features provided herein.
Claims (10)
1. A data processing method for power distribution network differential protection service, wherein the method is applied to a first customer premises equipment, and the method comprises:
receiving current fault component data to be communicated from a first protection device;
comparing the current fault component data with a preset standard data packet to obtain at least one change data;
obtaining a target data packet based on the at least one change data;
and sending the target data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the target data packet.
2. The method of claim 1, wherein obtaining the destination data packet based on the change data comprises:
combining the at least one change data with position information of the at least one change data in the current fault component data to obtain combined information;
and obtaining a target data packet based on the combined information.
3. The method of claim 2, wherein after obtaining the combination information, further comprising:
judging whether the first data volume of the combined information is smaller than the second data volume of the current fault component data or not to obtain a judgment result;
and representing that the first data volume is smaller than the second data volume based on the judgment result, and obtaining a target data packet based on the combined information.
4. The method of claim 2, wherein after obtaining the target packet based on the combination information, further comprising:
and updating the information of the target position in the target data packet into a preset compression identifier.
5. The method of claim 1, wherein prior to receiving the current fault component data to be communicated from the first protection device, further comprising:
determining a standard data packet at intervals of a preset number of data packets;
and sending the standard data packet to a second client front-end device, so that the second client front-end device obtains the current fault component data based on the standard data packet and the target data packet.
6. The method of claim 5, further comprising:
and receiving a response data packet fed back by the second customer premise equipment of the opposite terminal, wherein the response data packet indicates that the second customer premise equipment receives the standard data packet.
7. A data processing method for a power distribution network differential protection service is applied to a second customer premises equipment, and comprises the following steps:
receiving a target data packet sent by a first client front-end device;
analyzing the target data packet to obtain at least one change data;
combining the at least one change data with a preset standard data packet to obtain circuit fault component data;
sending the current fault component data to a second protection device.
8. The method of claim 7, further comprising:
receiving standard data packets sent by a first client front-end device, wherein a preset number of data packets are arranged between any two adjacent standard data packets at intervals;
and generating a response data packet for the standard data packet, wherein the response data packet carries a preset compression identifier, and the preset compression identifier is used for agreeing with the identifier of the target data packet with the first client front-end device.
9. A data processing apparatus for a power distribution network differential protection service, the apparatus being applied to a first customer premises equipment, comprising:
the first receiving module is used for receiving the current fault component data to be transmitted from the first protection device;
the comparison module is used for comparing the current fault component data with a preset standard data packet to obtain at least one change data;
the first processing module is used for obtaining a target data packet based on the at least one change data;
and the first sending module is used for sending the target data packet to the second customer premise equipment so that the second customer premise equipment obtains the current fault component data based on the target data packet.
10. A data processing apparatus for a power distribution network differential protection service, wherein the apparatus is applied to a second customer premises equipment, and comprises:
the second receiving module is used for receiving a target data packet sent by the first client front-end device;
the second processing module is used for processing the target data packet to obtain at least one piece of change data, and combining the at least one piece of change data with a preset standard data packet to obtain circuit fault component data;
and the second sending module is used for sending the current fault component data to a second protection device.
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