CN108880753A - A kind of acquisition methods and system of grid equipment operation data - Google Patents

A kind of acquisition methods and system of grid equipment operation data Download PDF

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Publication number
CN108880753A
CN108880753A CN201810639017.XA CN201810639017A CN108880753A CN 108880753 A CN108880753 A CN 108880753A CN 201810639017 A CN201810639017 A CN 201810639017A CN 108880753 A CN108880753 A CN 108880753A
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CN
China
Prior art keywords
receiving end
transmitting terminal
data packet
data
packet
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Application number
CN201810639017.XA
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Chinese (zh)
Inventor
郭伟斌
李晓帆
张莎
高晖
林达宜
庄黎明
周健
陆健
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Shenzhen Radio Detection Institute For Research And Technology
State Grid Shanghai Electric Power Co Ltd
Original Assignee
Shenzhen Radio Detection Institute For Research And Technology
State Grid Shanghai Electric Power Co Ltd
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Application filed by Shenzhen Radio Detection Institute For Research And Technology, State Grid Shanghai Electric Power Co Ltd filed Critical Shenzhen Radio Detection Institute For Research And Technology
Priority to CN201810639017.XA priority Critical patent/CN108880753A/en
Publication of CN108880753A publication Critical patent/CN108880753A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The present invention provides the acquisition methods and system of a kind of grid equipment operation data, the acquisition of grid equipment operation data and wireless transmission to existing network impotentia overlay area are realized.In the present invention, different transmitting terminals is distinguished by IP address, so that multiple transmitting terminals is accessed the communication link with receiving end by TDMA mode, and communicated with receiving end, so that the operation data of one or more grid equipments can be obtained from multiple transmitting terminals simultaneously by realizing receiving end.In each transmitting terminal of multiple access access and the communication process of receiving end, receiving end carries out error checking and correction to the received each data packet of institute by CRC cyclic redundancy check, and coordinates to transmit the data packet being not successfully received again using automatic repeat request ARQ mechanism；After the successful reception of all data packets, receiving end carries out MD5 Message Digest 5 completeness check to entire file, finally realizes the acquisition and wireless transmission of accurate, efficient, safe and reliable grid equipment operation data.

Description

A kind of acquisition methods and system of grid equipment operation data
Technical field
The present invention relates to POWER SYSTEM STATE monitoring and wireless communication technology field, especially a kind of grid equipment runs number According to acquisition methods and system.
Background technique
Urgent need with smart grid construction and commercial power, residential electricity consumption to regulated power, to grid equipment The real-time of operation data, accurate measurements are increasingly important, and transformer substation system automation just becomes a kind of unmodifiable trend.So And in power industry substation inspection field, for existing private network, public network impotentia overlay area, manual inspection is still main Want mode.In manual inspection mode, staff's integrated use sense organ and some matched detecting instruments are to transformer equipment The inspection based on simply qualitatively judging is carried out, therefore, there are large labor intensities, detection mass-dispersion, subjective factor for which The defects of more.Towards traditional network impotentia overlay area, replace traditional people using the wireless communication technique of intelligent portable Work inspection improves the flexibility and efficiency of substation inspection, has huge economic value.
The demand angle consideration applied from grid equipment Data Detection, the wireless monitor of grid equipment operation data and transmission Technology pointedly can successfully solve for temporarily establish grid equipment monitoring station, remote districts construction substation, It builds a considerable amount of middle-size and small-size power distribution stations etc. in urban district and does not have the scene for being laid with fiber optic communication condition, build traditional wire Communication network is existing, and difficulty of construction is big, high construction cost, the inflexible problem of networking.
However, the power equipment due to substation is many kinds of, and distributing position dispersion, and substation is in the process of running Around electromagnetic environment it is sufficiently complex, these all propose more the wireless collection and transmission technology of grid equipment operation data High requirement.Therefore, high efficiency, the safety and reliability for how improving the acquisition of grid equipment operation data and transmission, become POWER SYSTEM STATE monitoring at present and urgent problem to be solved in wireless communication.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind State the acquisition methods and system of the grid equipment operation data of problem.
One side according to an embodiment of the present invention provides a kind of acquisition methods of grid equipment operation data, is applied to Receiving end obtains the operation data of one or more grid equipments, the internet protocol of the multiple transmitting terminal by multiple transmitting terminals It is different to discuss IP address, and each of the multiple transmitting terminal connects one or more grid equipments, the method Including：
The receiving end successively sends the connection request signal for carrying different IP address informations to the multiple transmitting terminal；
After each of the multiple transmitting terminal receives the connection request signal every time, the connection request is read IP address information in signal, and be compared with the IP address of itself, judge whether the two is identical, if it is not, then keeping monitoring State；If so, send connection response signal to the receiving end to access the communication link with the receiving end, and with it is described Receiving end communication obtains the operation data of one or more grid equipments to realize the receiving end from the transmitting terminal；Wherein, Each of the access and multiple transmitting terminals of communication link of the receiving end transmitting terminal section and institute in different times Receiving end is stated to be communicated.
Optionally, each of the access and multiple transmitting terminals of communication link of the receiving end transmitting terminal and institute The communication process for stating receiving end includes：
After the receiving end receives the connection response signal of the transmitting terminal, carrying target grid is sent to the transmitting terminal and is set The data acquisition control signal of standby number and filename；
After the transmitting terminal receives the data acquisition control signal, passed through according to the data acquisition control signal specified Agreement reads the operation data file of the target grid equipment, and read operation data file is encrypted, and By encrypted file division at N number of data packet, N is the integer greater than 1；
The transmitting terminal sends the data acquisition feedback signal for carrying the information that data packet total number is N to the receiving end；
The receiving end after receiving data acquisition feedback signal, according to the data acquire feedback signal to this Transmitting terminal sends data packet request signal；
The transmitting terminal sequentially sends carrying package sequence after receiving the data packet request signal, to the receiving end one by one Number and first of the first information of check code to n-th data packet；
The receiving end receive described first it is described every to reading after each of n-th data packet data packet The first check code and packet serial number in one data packet verify each described data packet according to first check code It obtains the first check results and corresponds to save the packet serial number and first check results；
The transmitting terminal sends to the receiving end after having sent the n-th data packet and carries the second information of check code The first end of transmission feedback signal；
After the receiving end receives first end of transmission feedback signal, it is received that institute is successively inquired according to packet serial number First check results of data packet judge whether current data packet has been properly received according to first check results, if It is to carry out the judgement to next data packet, if it is not, being asked to the re-transmission that the transmitting terminal sends the packet serial number for carrying current data packet Seek signal；
After the transmitting terminal receives the retransmission request signal, sent according to the retransmission request signal to the receiving end Carry the packet serial number of transmitted data packet and the data packet of first check code；
After the receiving end receives the data packet, the first check code and packet serial number in the data packet, root are read The data packet is verified to obtain the second check results according to first check code and packet serial number, according to second verification As a result judge whether the current data packet has been properly received, if so, according to first check results to next data packet Judged；If it is not, the retransmission request signal for carrying the packet serial number of current data packet is sent to the transmitting terminal again, until described Current data packet has been properly received；
The receiving end and the transmitting terminal repeat the judgement and retransmissions steps of the data packet, until all data packets It is properly received；
The receiving end merges the received all data packets of institute and obtains data file, according to second check code to described Data file carries out completeness check, judges in the result and first end of transmission feedback signal of the completeness check Whether the second check code is consistent, if it is not, the data packet request signal is sent to the transmitting terminal again, if so, institute is received Local file is written in all data packets, sends the second end of transmission feedback signal to the transmitting terminal.
Optionally, first check code is CRC cyclic redundancy check code；
The data packet is verified according to first check code to obtain the first check results, including：
CRC cyclic redundancy check is carried out to the data packet and obtains CRC cyclic redundancy check result.
Optionally, the data packet is verified to obtain the second verification knot according to first check code and packet serial number Fruit judges whether the current data packet has been properly received according to second check results, including：
To data packet progress CRC cyclic redundancy check and more read packet serial number and the retransmission request signal In packet serial number；
If CRC cyclic redundancy check result packet consistent and read with the CRC cyclic redundancy check code Serial number is consistent with the packet serial number in the retransmission request signal, then judges that the current data packet has been properly received；
If the CRC cyclic redundancy check result and CRC cyclic redundancy check code is inconsistent or read Bao Xu It is number inconsistent with the packet serial number in the retransmission request signal, then judge that the current data packet is not successfully received.
Optionally, second check code is MD5 Message Digest 5 check code, and the completeness check is MD5 message Digest algorithm verification.
Optionally, before the receiving end sends the data acquisition control signal to the transmitting terminal, further include：
The received signal to noise ratio SNR respectively received under frequency in current frequency range is detected in the transmitting terminal and the receiving end, described to connect Receiving end chooses the optimal reception frequency of the receiving end, and the hair according to itself each received signal to noise ratio SNR received under frequency End is penetrated according to optimal reception frequency selection purposes transmitting terminal of itself each received signal to noise ratio SNR received under frequency and the receiving end Optimal reception frequency, wherein the optimal reception frequency of the transmitting terminal be not equal to the receiving end optimal reception frequency；
The transmission frequency of itself and reception frequency are adjusted separately the optimal reception frequency for the receiving end by the transmitting terminal With the optimal reception frequency of this transmitting terminal, and the receiving end by the transmission frequency of itself and receive frequency be adjusted to the transmitting The optimal reception frequency at end and the optimal reception frequency of this receiving end.
According to another aspect of an embodiment of the present invention, a kind of acquisition system of grid equipment operation data is additionally provided, is wrapped It includes：Multiple transmitting terminals and receiving end；
The internet protocol address of the multiple transmitting terminal is different, and each of the multiple transmitting terminal Including：Data acquisition and processing (DAP) unit is connect with one or more grid equipments, for acquiring data simultaneously from the grid equipment Data collected are handled, and
First Transmit Receive Unit is connected with the data acquisition and processing (DAP) unit, for carrying out letter with the receiving end Number interaction and to the receiving end send data；
The receiving end obtains the operation data of one or more grid equipments by the multiple transmitting terminal, and described Receiving end includes：Second Transmit Receive Unit, the first radio-frequency receiving-transmitting list with each of the multiple transmitting terminal transmitting terminal Member is wirelessly connected, for carrying out signal interaction with the transmitting terminal and from transmitting terminal reception data, and
Data processing and control unit are connect with second Transmit Receive Unit, for receiving to by second radio frequency The received data of bill member are handled and generate control signal；
It is described when the receiving end obtains the operation data of one or more grid equipments by the multiple transmitting terminal Receiving end successively sends the connection request signal for carrying different IP address informations to the multiple transmitting terminal；
After each of the multiple transmitting terminal receives the connection request signal every time, the connection request is read IP address information in signal, and be compared with the IP address of itself, judge whether the two is identical, if it is not, then keeping monitoring State；If so, send connection response signal to the receiving end to access the communication link with the receiving end, and with it is described Receiving end communication obtains the operation data of one or more grid equipments to realize the receiving end from the transmitting terminal；Wherein, Each of the access and multiple transmitting terminals of communication link of the receiving end transmitting terminal section and institute in different times Receiving end is stated to be communicated.
Optionally, each of the access and multiple transmitting terminals of communication link of the receiving end transmitting terminal and institute The communication process for stating receiving end includes：
After the receiving end receives the connection response signal of the transmitting terminal, carrying target grid is sent to the transmitting terminal and is set The data acquisition control signal of standby number and filename；
After the transmitting terminal receives the data acquisition control signal, passed through according to the data acquisition control signal specified Agreement reads the operation data file of the target grid equipment, and read operation data file is encrypted, and By encrypted file division at N number of data packet, N is the integer greater than 1；
The transmitting terminal sends the data acquisition feedback signal for carrying the information that data packet total number is N to the receiving end；
The receiving end after receiving data acquisition feedback signal, according to the data acquire feedback signal to this Transmitting terminal sends data packet request signal；
The transmitting terminal sequentially sends carrying package sequence after receiving the data packet request signal, to the receiving end one by one Number and first of the first information of check code to n-th data packet；
The receiving end receive described first it is described every to reading after each of n-th data packet data packet The first check code and packet serial number in one data packet verify each described data packet according to first check code It obtains the first check results and corresponds to save the packet serial number and first check results；
The transmitting terminal sends to the receiving end after having sent the n-th data packet and carries the second information of check code The first end of transmission feedback signal；
After the receiving end receives first end of transmission feedback signal, it is received that institute is successively inquired according to packet serial number First check results of data packet judge whether current data packet has been properly received according to first check results, if It is to carry out the judgement to next data packet, if it is not, being asked to the re-transmission that the transmitting terminal sends the packet serial number for carrying current data packet Seek signal；
After the transmitting terminal receives the retransmission request signal, sent according to the retransmission request signal to the receiving end Carry the packet serial number of transmitted data packet and the data packet of first check code；
After the receiving end receives the data packet, the first check code and packet serial number in the data packet, root are read The data packet is verified to obtain the second check results according to first check code and packet serial number, according to second verification As a result judge whether the current data packet has been properly received, if so, according to first check results to next data packet Judged；If it is not, the retransmission request signal for carrying the packet serial number of current data packet is sent to the transmitting terminal again, until described Current data packet has been properly received；
The receiving end and the transmitting terminal repeat the judgement and retransmissions steps of the data packet, until all data packets It is properly received；
The receiving end merges the received all data packets of institute and obtains data file, according to second check code to described Data file carries out completeness check, judges in the result and first end of transmission feedback signal of the completeness check Whether the second check code is consistent, if it is not, the data packet request signal is sent to the transmitting terminal again, if so, institute is received Local file is written in all data packets, sends the second end of transmission feedback signal to the transmitting terminal.
Optionally, first check code is CRC cyclic redundancy check code；The receiving end is also used to：
CRC cyclic redundancy check is carried out to the data packet and obtains CRC cyclic redundancy check result.
Optionally, the receiving end is also used to：
After receiving the transmitting terminal and responding the data packet that the retransmission request signal is sent, the data packet is carried out Packet serial number in CRC cyclic redundancy check and more read packet serial number and the retransmission request signal；
If CRC cyclic redundancy check result packet consistent and read with the CRC cyclic redundancy check code Serial number is consistent with the packet serial number in the retransmission request signal, then judges that the current data packet has been properly received；
If the CRC cyclic redundancy check result and CRC cyclic redundancy check code is inconsistent or read Bao Xu It is number inconsistent with the packet serial number in the retransmission request signal, then judge that the current data packet is not successfully received.
Optionally, second check code is MD5 Message Digest 5 check code, and the completeness check is MD5 message Digest algorithm verification.
Optionally, the transmitting terminal and the receiving end are also used to：
Before the receiving end sends the data acquisition control signal to the transmitting terminal, the transmitting terminal and the reception The received signal to noise ratio SNR respectively received under frequency in current frequency range is detected at end, and the receiving end is according under itself each reception frequency Received signal to noise ratio SNR chooses the optimal reception frequency of the receiving end, and the transmitting terminal is according under itself each reception frequency The optimal reception frequency of received signal to noise ratio SNR and the optimal reception frequency selection purposes of the receiving end transmitting terminal, the wherein transmitting The optimal reception frequency at end is not equal to the optimal reception frequency of the receiving end；
The transmission frequency of itself and reception frequency are adjusted separately the optimal reception frequency for the receiving end by the transmitting terminal With the optimal reception frequency of this transmitting terminal, and the receiving end by the transmission frequency of itself and receive frequency be adjusted to the transmitting The optimal reception frequency at end and the optimal reception frequency of this receiving end.
Technical solution provided in an embodiment of the present invention realizes the grid equipment fortune to existing network impotentia overlay area The acquisition and wireless transmission of row data.The operation data of one or more grid equipments is obtained by multiple transmitting terminals in receiving end When, receiving end carries the connection request signal of different IP addresses information by successively sending, and makes each of multiple transmitting terminals Transmitting terminal accesses the communication link with receiving end according to the comparison result of the IP address information and own IP address, and different Period is communicated with receiving end, to realize through time division multiple acess TDMA access way, keeps receiving end efficiently same When from the transmitting terminal of multiple and different addresses obtain grid equipment operation data.
Further, in the communication process of each of multiple transmitting terminals of multiple access access transmitting terminal and receiving end, The data acquisition control signal that transmitting terminal is sent according to receiving end reads operation data file from target grid equipment, it is encrypted and Receiving end is transferred to after dividing processing, receiving end carries out mistake to the received each data packet of institute using CRC cyclic redundancy check Verification, and coordinate to transmit the data packet being not successfully received again using automatic repeat request ARQ mechanism, it ensure that all data Packet is repeated, and improves the accuracy of data transmission；Meanwhile after the correct end of transmission of all data packets, receiving end is adopted Completeness check is carried out to entire file with the verification of MD5 Message Digest 5, improves the reliability of transmission, it is final realize accurately, Efficiently, the acquisition and wireless transmission of safe and reliable grid equipment operation data.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention, And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter The above and other objects, advantages and features of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 shows the flow diagram of the acquisition methods of grid equipment operation data according to an embodiment of the invention；
Each transmitting terminal and reception Fig. 2 shows access according to an embodiment of the invention with the communication link of receiving end The schematic diagram of the communication process at end；
Fig. 3 shows the schematic diagram of three kinds of OFDM frame structures according to an embodiment of the invention；And
Fig. 4 shows the structural schematic diagram of the acquisition system of grid equipment operation data according to an embodiment of the invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure It is fully disclosed to those skilled in the art.
Inventors have found that in the prior art, when carrying out radio patrol checking to substation, common mode has following two： The first, receiving end only accesses the transmitting terminal of a transformer substation side every time, is in communication with, to obtain electricity from the transmitting terminal The operation data of power equipment, the data acquisition of this mode and efficiency of transmission are lower.Second, multiple nothings are provided in receiving end Line transceiver module, these radio receiving transmitting modules communicate with the transmitting terminal of multiple transformer substation sides obtaining power equipment simultaneously Operation data.Although the data acquisition of the second way and efficiency of transmission are higher, the number of components of receiving end is increased, is increased Cost is added；Meanwhile multiple transmitting terminals need to occupy different channels respectively and be communicated with receiving end, not only increase channel money The consumption in source, and increase the data process load of receiving end.In addition, the running environment characteristic of substation is but also to acquisition More stringent requirements are proposed for safety and reliability when grid equipment operation data.
In order to solve the above technical problems, the embodiment of the present invention proposes a kind of acquisition methods of grid equipment operation data, answer The operation data of one or more grid equipments, the internet of multiple transmitting terminal are obtained by multiple transmitting terminals for receiving end Protocol IP address is different, and each of multiple transmitting terminal connects one or more grid equipments.Fig. 1 is shown The flow diagram of the acquisition methods of grid equipment operation data according to an embodiment of the invention.Referring to Fig. 1, the grid equipment The acquisition methods of operation data may comprise steps of S102 to step S104.
Step S102, receiving end successively sent to multiple transmitting terminals carry different IP (Internet Protocol, mutually Networking protocol) address information connection request signal.
Step S104 after each of multiple transmitting terminals receive connection request signal every time, reads connection request letter IP address information in number, and be compared with the IP address of itself, judge whether the two is identical, if it is not, then keeping monitoring shape State；If so, sending connection response signal to receiving end to access the communication link with receiving end, and communicate, comes with receiving end Realize that receiving end obtains the operation data of one or more grid equipments from transmitting terminal；Wherein, the communication chain with receiving end is accessed Section is communicated each of multiple transmitting terminals on road transmitting terminal with receiving end in different times.
The acquisition methods for the grid equipment operation data that the embodiment of the present invention proposes, realize and cover to existing network impotentia The acquisition and wireless transmission of the grid equipment operation data of cover area.One or more is obtained by multiple transmitting terminals in receiving end When the operation data of grid equipment, receiving end carries the connection request signal of different IP addresses information by successively sending, and makes more Each of a transmitting terminal transmitting terminal is according to the access of the comparison result of the IP address information and own IP address and receiving end Communication link, and section is communicated with receiving end in different times, passes through time division multiple acess TDMA (Time to realize Division multiple access, time division multiple acess) access way, allow receiving end efficiently simultaneously from multiple and differently The transmitting terminal of location obtains grid equipment operation data.
In above step S102, multiple transmitting terminals are arranged in transformer substation side, their IP address is different, each hair Penetrate one or more grid equipments that end all connects transformer substation side.Receiving end is with preset time series successively to multiple transmitting terminals Connection request signal is sent, the IP address information for the transmitting terminal to be accessed is carried in each connection request signal.
In above step S104, after each of multiple transmitting terminals transmitting terminal receives connection request signal every time, all The IP address information carried in the connection request signal can be compared with the IP address of itself, if identical, access and The communication link of receiving end communicates with, if it is different, then keeping listening state.In this way, being distinguished by IP address different Transmitting terminal by the communication link of multiple transmitting terminals access and receiving end, and is led to the preset time series with receiving end Letter allows receiving end to obtain one or more electricity from multiple transmitting terminals simultaneously to realize in such a way that TDMA is accessed The operation data of net equipment substantially increases the efficiency of data acquisition while mentioning high channel resource use ratio.
In alternative embodiment of the invention, each of access and multiple transmitting terminals of communication link of receiving end hair The communication process for penetrating end and receiving end can be as shown in Figure 2.Referring to fig. 2, which may include steps of S202 extremely Step S224.
Step S202 after receiving end receives the connection response signal of transmitting terminal, sends to transmitting terminal and carries target grid The data acquisition control signal of device numbering and filename.
Step S204 after transmitting terminal receives data acquisition control signal, passes through specified according to data acquisition control signal Agreement reads the operation data file of target grid equipment, and read operation data file is encrypted, and will add For file division after close at N number of data packet, N is the integer greater than 1.
Step S206, transmitting terminal send the data acquisition feedback letter for carrying the information that data packet total number is N to receiving end Number.
Step S208, receiving end acquire feedback signal to transmitting after receiving data acquisition feedback signal, according to data End sends data packet request signal.
Step S210, transmitting terminal sequentially send carrying package sequence after receiving data packet request signal, to receiving end one by one Number and first of the first information of check code to n-th data packet.
Step S212, receiving end receive first to after each of n-th data packet data packet, read each The first check code and packet serial number in data packet, verify each data packet according to the first check code to obtain the first verification As a result and preservation packet serial number and the first check results are corresponded to.
Step S214, transmitting terminal send to receiving end after having sent n-th data packet and carry the second information of check code First end of transmission feedback signal.
Step S216 is successively inquired according to packet serial number and is received after receiving end receives the first end of transmission feedback signal Data packet the first check results, judge whether current data packet has been properly received according to the first check results, if so, carry out Judgement to next data packet, if it is not, sending the retransmission request signal for carrying the packet serial number of current data packet to transmitting terminal.
Step S218 after transmitting terminal receives retransmission request signal, sends to receiving end according to retransmission request signal and carries The packet serial number of transmitted data packet and the data packet of the first check code.
Step S220, after receiving end receives data packet, the first check code and packet serial number in read data packet, according to One check code and packet serial number verify data packet to obtain the second check results, judge current data according to the second check results Whether packet has been properly received, if so, being judged according to the first check results next data packet；If it is not, again to transmitting End sends the retransmission request signal for carrying the packet serial number of current data packet, until current data packet has been properly received.
The judgement and retransmissions steps of step S222, receiving end and transmitting terminal repetitive data packet, until all data packets It is properly received.
Step S224, receiving end merges the received all data packets of institute and obtains data file, according to the second check code logarithm Completeness check is carried out according to file, the result for judging completeness check and the second check code in the first end of transmission feedback signal It is whether consistent, if it is not, data packet request signal is sent to transmitting terminal again, if so, originally by the received all data packet write-ins of institute Ground file sends the second end of transmission feedback signal to transmitting terminal.In the transmitting of each of multiple transmitting terminals of multiple access access With the communication process of receiving end, transmitting terminal is read according to the data acquisition control signal that receiving end is sent from target grid equipment at end Operation data file is taken, receiving end is transferred to after encrypted and dividing processing, receiving end carries out the received each data packet of institute Error checking and correction, and coordinate to transmit the data packet being not successfully received again using automatic repeat request ARQ mechanism, it ensure that all Data packet is repeated, and improves the accuracy of data transmission；Meanwhile after the correct end of transmission of all data packets, receive End carries out completeness check to entire file, improves the reliability of transmission, finally realizes accurate, efficient, safe and reliable power grid The acquisition and wireless transmission of equipment operating data.
It is serious in electromagnetic interference in order to guarantee in the communication process of transmitting terminal provided in an embodiment of the present invention and receiving end In the case where transmission quality, using OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency Divide multiplexing) technology, the frame structure of OFDM is the 802.11a/g physical layer frame of standard.In embodiments of the present invention, according to different It is wirelessly transferred content, the data portion in the frame structure of different controls and feedback signal is redesigned, with specific aim Realize different functions.Fig. 3 shows the schematic diagram of three kinds of OFDM frame structures according to an embodiment of the invention.Referring to Fig. 3, A kind of data portion of OFDM frame structure may include Packet type, packet serial number, grid equipment number, filename, random sequence and First check code, the data portion of second of OFDM frame structure may include Packet type, packet serial number, data content and the first verification Code, the data portion of the third OFDM frame structure may include Packet type, packet serial number, file size verification, the second check code, with Machine sequence and the first check code, wherein random sequence and data content can be designed as adjustable with data length.It is set by this Meter can be according to the variation of environment in signal and data packet transmission when the electromagnetic environment around substation changes OFDM frame structure carries out adjustment in due course to improve the success rate of transmission.Specifically, the electromagnetic environment around substation becomes to dislike It is bad, when serious interference, it can come by adjusting the length of random sequence and/or data content in above-mentioned three kinds of OFDM frame structures The data frame length in signal and data packet transmission is reduced, to improve the success rate of transmission.In addition, in addition to data symbol with Outside, it is also inserted into lead code and pilot tone in each data frame, so that system of the invention is able to carry out channel estimation, frequency shift (FS) is estimated The operations such as meter compensation.
The first in the frame structure such as Fig. 3 that the transmission of the data acquisition control signal referred in above step S202 uses Shown in OFDM frame structure.Referring to Fig. 3, the frame structure of the data acquisition control signal can be by Packet type, packet serial number, grid equipment Number, filename, random sequence and the first check code composition.The power grid carried in data frame by data acquisition control signal Device numbering and filename, the operation data file for the target grid equipment that instruction transmitting terminal need to be read.
In above step S204, after transmitting terminal receives data acquisition control signal, according in data acquisition control signal The target grid device numbering and filename of carrying read the corresponding operation data text of target grid equipment by specified protocol Part.
In a kind of optional embodiment, transmitting terminal can (File Transfer Protocol, text be passed by FTP Defeated agreement) data acquisition control signal is sent to target grid equipment and receives the operation data text from target grid equipment Part, to realize flexible, the highly effective gathering of grid equipment operation data.
In practical operation preferably, transmitting terminal using TCP (Transmission Control Protocol, Transmission control protocol) with target grid equipment generate a virtual link be used for transmission control information, then regenerate a list Only TCP connection is transmitted for data.If connection failure, transmitting terminal is fed back to receiving end reads failure news, to receive End prompt checks whether input order is wrong.If successful connection, data acquisition control signal is sent to target grid by transmitting terminal Equipment, and receive the operation data of target grid equipment transmission.
In one alternate embodiment, encryption can use symmetric encipherment algorithm, such as DES (Data Encryption Standard, data encryption standards) algorithm, 3DES (Triple Data Encryption Standard, triple data encryptions Standard) algorithm, IDEA (International Data Encryption Algorithm, international data encryption algorithm), RC4 (Rivest Cipher 4, Lee Vista encrypt 4) algorithm etc., rivest, shamir, adelman can also be used, such as RSA (Rivest- Shamir-Adleman, Lee Vista-Shamir-A Deman) algorithm.
In above step S210 and S212, after transmitting terminal receives the data packet request signal from receiving end, to use To receiving end, sequential delivery divides resulting first to n-th data to the data frame of second of OFDM frame structure one by one in Fig. 3 Packet.Referring to Fig. 3, the frame structure of the data packet can be made of Packet type, packet serial number, data content and the first check code.It receives End by read the first check code and packet serial number in each received data packet, according to the first check code to data packet into Row verification obtains the first check results, and packet serial number and the first check results are saved correspondingly.
Due to transmitting herein the stage, receiving end need to only send a data packet request signal, without being directed to each number Request is sent according to packet, the signaling transmission time between receiving end and transmitting terminal is saved, improves the efficiency of transmission.
In alternative embodiment of the invention, the first check code is error check code, according to the first check code to data packet Verified to obtain the first check results include：Corresponding error checking and correction is carried out to data packet and obtains error checking and correction result.It is preferred that Ground, the first check code are CRC (Cyclic Redundancy Check, cyclic redundancy check) codes；According to the first check code logarithm It is verified to obtain the first check results according to packet, including：CRC check is carried out to data packet and obtains CRC check result.
Third in the frame structure such as Fig. 3 that the transmission of the first end of transmission feedback signal referred in above step S214 uses Shown in kind OFDM frame structure.Referring to Fig. 3, the frame structure of first end of transmission feedback signal can be by Packet type, packet serial number, text Part length check, the second check code, random sequence and the first check code composition.Transmitting terminal after having sent n-th data packet, with The data frame of the third above-mentioned OFDM frame structure sends the first end of transmission feedback signal to receiving end, so that receiving end is judging After all data packets have been properly received out, according to the second check code in the data frame to received all data packet groups at Entire file carries out completeness check.
The transmission for the retransmission request signal that above step S216 is referred into S222 is using second of OFDM frame knot in Fig. 3 Structure, to determine that receiving end asks according to the packet serial number carried in retransmission request signal after transmitting terminal receives retransmission request signal Seek the data packet of re-transmission.
After transmitting terminal has determined the data packet of receiving end request retransmission, equally using second of OFDM frame structure in Fig. 3 Data packet from data frame to receiving end transmitting and receiving terminal request retransmission, to be read after receiving end receives the data packet of re-transmission It takes the first check code carried in data packet and packet serial number and data packet is verified to obtain the second check results accordingly, in turn Judge whether current data packet has been properly received according to the second check results.
In alternative embodiment of the invention, data packet is verified to obtain second according to the first check code and packet serial number Check results judge whether current data packet has been properly received according to the second check results, including：
CRC cyclic redundancy check is carried out to data packet and the Bao Xu in more read packet serial number and retransmission request signal Number；
If CRC cyclic redundancy check result packet serial number consistent and read with CRC cyclic redundancy check code with again The packet serial number passed in request signal is consistent, then judges that current data packet has been properly received；
If CRC cyclic redundancy check result and CRC cyclic redundancy check code is inconsistent or read packet serial number and retransmits Packet serial number in request signal is inconsistent, then judges that current data packet is not successfully received.
In the data packet retransmission stage, by being carried out received by CRC check and comparison to the re-transmission data packet received Packet serial number and the packet serial number in retransmission request signal of re-transmission data packet whether unanimously judge whether data packet is properly received, Coordinate to transmit the number being not successfully received again by ARQ (Automatic Repeat Request, automatic repeat request) mechanism It according to packet, ensure that all data packets are repeated, improve the accuracy of data transmission.
In above step S224, after all data packets have been properly received, receiving end is according to the first end of transmission feedback letter The second check code carried in number to received all data packet groups at entire file carry out completeness check, to improve The reliability of transmission.
In alternative embodiment of the invention, the second check code is Message Digest 5 check code, and completeness check is pair The Message Digest 5 verification answered, wherein Message Digest 5 can be MD5 (Message-Digest Algorithm 5, disappear Breath-digest algorithm 5), MD4 (Message-Digest Algorithm 4, Message-Digest algorithm 4), SHA (Secure Hash Algorithm, secure hash algorithm) etc..Preferably, the second check code is MD5 check code, and completeness check is that MD5 message is plucked Algorithm is wanted to verify.
In alternative embodiment of the invention, before receiving end sends data acquisition control signal to transmitting terminal, also wrap It includes：
Transmitting terminal and receiving end detect respectively received in current frequency range under frequency reception SNR (Signal Noise Ratio, Signal-to-noise ratio), receiving end chooses the optimal reception frequency of receiving end according to itself each received signal to noise ratio SNR received under frequency, and And transmitting terminal respectively receives the optimal reception frequency selection purposes transmitting terminal of the received signal to noise ratio SNR and receiving end under frequency according to itself Optimal reception frequency, wherein the optimal reception frequency of transmitting terminal is not equal to the optimal reception frequency of receiving end；
The transmission frequency of itself and reception frequency are adjusted separately optimal reception frequency and Ben Fa for receiving end by transmitting terminal The optimal reception frequency at end is penetrated, and the transmission frequency of itself and reception frequency are adjusted to the optimal reception of transmitting terminal by receiving end The optimal reception frequency of frequency and this receiving end.
By before transmitting terminal and receiving end carry out data transmission, selecting the optimal communication of transmitting terminal and receiving end frequency Rate, and the transmitting-receiving frequency of the two is respectively corresponded and is adjusted to optimal communication frequency, allow transmitting terminal and receiving end optimal logical Carry out data transmission under letter frequency, improve the reliability and transmission quality of wireless connection, reduces environmental disturbances and passed to wireless Defeated influence.
A variety of implementations of the links of Fig. 1 and embodiment illustrated in fig. 2 are described above.It should be noted that real Border application in, above-mentioned all optional embodiments can using combination by the way of any combination, form optional implementation of the invention Example, this is no longer going to repeat them.
Based on the same inventive concept, the embodiment of the invention also provides a kind of acquisition systems of grid equipment operation data. Fig. 4 shows the structural schematic diagram of the acquisition system of grid equipment operation data according to an embodiment of the invention.Referring to fig. 4, The acquisition system of the grid equipment operation data at least may include：Multiple transmitting terminals 410 and receiving end 420, wherein each hair The IP address for penetrating end 410 is different, and each transmitting terminal 410 may include data acquisition and processing (DAP) unit 411 and first Transmit Receive Unit 412；Receiving end 420 obtains the operation data of one or more grid equipments by multiple transmitting terminals 410, and And receiving end 420 may include the second Transmit Receive Unit 421 and data processing and control element (PCE) 422.
Now introduce the acquisition system of the grid equipment operation data of the embodiment of the present invention each composition or device function with And the connection relationship between each section：
Data acquisition and processing (DAP) unit 411 is connect with one or more grid equipments, is used for from the one or more power grid Devices collect data is simultaneously handled data collected；
First Transmit Receive Unit 412, is connected with data acquisition and processing (DAP) unit 411, for carrying out letter with receiving end 420 Number interaction and to receiving end 420 send data；
Second Transmit Receive Unit 421 is wirelessly connected with the first Transmit Receive Unit 412, for carrying out with transmitting terminal 410 Signal interaction simultaneously receives data from transmitting terminal 410；
Data processing and control unit 422 are connect with the second Transmit Receive Unit 421, for by the second radio-frequency receiving-transmitting The received data of unit 421 are handled and generate control signal；
When receiving end 420 obtains the operation data of one or more grid equipments by multiple transmitting terminals 410, Duo Gefa End 410 is penetrated to be interacted as follows with receiving end 420：
Receiving end 420 successively sends the connection request signal for carrying different IP address informations to multiple transmitting terminals 410；
After each transmitting terminal 410 receives the connection request signal every time, the IP address in connection request signal is read Information, and be compared with the IP address of itself, judge whether the two is identical, if it is not, then keeping listening state；If so, to Receiving end 420 sends connection response signal to access the communication link with receiving end 420, and communicates with receiving end 420, to realize Receiving end 420 obtains the operation data of one or more grid equipments from transmitting terminal 410；Wherein, it accesses logical with receiving end 420 Section is communicated each transmitting terminal 410 of letter link with receiving end 420 in different times.
It should be noted that the quantity of transmitting terminal 410 shown in Fig. 4 is only illustrative, the invention is not limited thereto.
In the monitoring application of actual power grid quality, transmitting terminal 410 can be applied to transformer substation end, and receiving end 420 can be with Applied to vehicle-mounted mobile detection platform as relay and control end, to complete grid equipment operation data from multiple transformer substation ends to vehicle Carry the wireless transmission of movable detecting platform.First Transmit Receive Unit 412 and the second Transmit Receive Unit 421 can use high property (Universal Software Radio Peripheral leads to the USRP of energy, high bandwidth and Larger Dynamic range processing capacity With software radio peripheral hardware) equipment, such as the USRP series of NI company, and configure the radio-frequency front-end of 400MHz-3GHz frequency range.Base In the programmability of USRP equipment, multiple access access and the OFDM modulation function of acquisition system of the invention are realized.Data acquisition and Processing unit 411 can be made of interchanger and industrial personal computer.The operation data measuring instrument (for example, ammeter) of multichannel grid equipment It is connected by the network interface of Ethernet with interchanger, realizes plug and play access.
In alternative embodiment of the invention, each transmitting terminal 410 and reception of the access with the communication link of receiving end 420 End 420 communication process include：
After receiving end 420 receives the connection response signal of transmitting terminal 410, is sent to transmitting terminal 410 and carry target grid The data acquisition control signal of device numbering and filename；
After transmitting terminal 410 receives data acquisition control signal, read according to data acquisition control signal by specified protocol Read operation data file is encrypted in the operation data file for taking target grid equipment, and will be encrypted For file division at N number of data packet, N is the integer greater than 1；
Transmitting terminal 410 sends the data acquisition feedback signal for carrying the information that data packet total number is N to receiving end 420；
Receiving end 420 acquires feedback signal according to data and sends out to transmitting terminal 410 after receiving data acquisition feedback signal Send data packet request signal；
Transmitting terminal 410 after receiving data packet request signal, to receiving end 420 one by one sequence send carrying package serial number and First of first information of check code is to n-th data packet；
Receiving end 420 receives first to after each of n-th data packet data packet, reads each data packet In the first check code and packet serial number, each data packet is verified according to the first check code to obtain the first check results simultaneously It is corresponding to save packet serial number and the first check results；
Transmitting terminal 410 sends to receiving end 420 after having sent n-th data packet and carries the of the second information of check code One end of transmission feedback signal；
After receiving end 420 receives the first end of transmission feedback signal, received data is successively inquired according to packet serial number First check results of packet, judge whether current data packet has been properly received according to the first check results, if so, carrying out to next The judgement of a data packet, if it is not, sending the retransmission request signal for carrying the packet serial number of current data packet to transmitting terminal 410；
After transmitting terminal 410 receives retransmission request signal, sends to carry to receiving end 420 according to retransmission request signal and be sent out The packet serial number for the data packet sent and the data packet of the first check code；
After receiving end 420 receives data packet, the first check code and packet serial number in read data packet, according to the first verification Code and packet serial number verify data packet to obtain the second check results, whether judge current data packet according to the second check results It has been be properly received that, if so, being judged according to the first check results next data packet；If it is not, being sent out again to transmitting terminal 410 The retransmission request signal for carrying the packet serial number of current data packet is sent, until current data packet has been properly received；
The judgement and retransmissions steps of 410 repetitive data packet of receiving end 420 and transmitting terminal, until all data packets have succeeded It receives；
Receiving end 420 merges the received all data packets of institute and obtains data file, according to the second check code to data file Carry out completeness check, judge completeness check result and the first end of transmission feedback signal in the second check code whether one It causes, if it is not, data packet request signal is sent to transmitting terminal 410 again, if so, by the received all local texts of data packet write-in of institute Part sends the second end of transmission feedback signal to transmitting terminal 410.
In alternative embodiment of the invention, the first check code is CRC cyclic redundancy check code；Receiving end 420 is also used to：
CRC cyclic redundancy check is carried out to data packet and obtains CRC cyclic redundancy check result.
In alternative embodiment of the invention, receiving end 420 is also used to：
After receiving transmitting terminal 410 and responding the data packet that retransmission request signal is sent, it is superfluous that CRC circulation is carried out to data packet Packet serial number in remaining verification and more read packet serial number and retransmission request signal；
If CRC cyclic redundancy check result packet serial number consistent and read with CRC cyclic redundancy check code with again The packet serial number passed in request signal is consistent, then judges that current data packet has been properly received；
If CRC cyclic redundancy check result and CRC cyclic redundancy check code is inconsistent or read packet serial number and retransmits Packet serial number in request signal is inconsistent, then judges that current data packet is not successfully received.
In alternative embodiment of the invention, the second check code is MD5 Message Digest 5 check code, and completeness check is The verification of MD5 Message Digest 5.
In alternative embodiment of the invention, transmitting terminal 410 and receiving end 420 are also used to：
Before receiving end 420 sends data acquisition control signal to transmitting terminal 410, transmitting terminal 410 and receiving end 420 are examined The received signal to noise ratio SNR respectively received under frequency is surveyed in current frequency range, and receiving end 420 is believed according to itself each reception received under frequency It makes an uproar and chooses the optimal reception frequency of receiving end than SNR, and transmitting terminal 410 is according to itself each received signal to noise ratio received under frequency The optimal reception frequency of SNR and the optimal reception frequency selection purposes transmitting terminal of receiving end, wherein the optimal reception frequency of transmitting terminal is not Equal to the optimal reception frequency of receiving end；
The transmission frequency of itself and reception frequency are adjusted separately the optimal reception frequency for receiving end 420 by transmitting terminal 410 With the optimal reception frequency of this transmitting terminal 410, and receiving end 420 by the transmission frequency of itself and receive frequency be adjusted to emit The optimal reception frequency at end 410 and the optimal reception frequency of this receiving end 420.
According to the combination of any one above-mentioned alternative embodiment or multiple alternative embodiments, the embodiment of the present invention can reach Following beneficial effect：
The embodiment of the present invention propose grid equipment operation data acquisition methods and system, realize to existing network without The acquisition and wireless transmission of the grid equipment operation data of ability overlay area.One is obtained by multiple transmitting terminals in receiving end Or multiple grid equipments operation data when, receiving end by successively send carry different IP addresses information connection request letter Number, so that each of multiple transmitting terminals transmitting terminal is accessed and is connect according to the comparison result of the IP address information and own IP address The communication link of receiving end, and section is communicated with receiving end in different times, is accessed to realize by time division multiple acess TDMA Mode allows receiving end efficiently to obtain grid equipment operation data from the transmitting terminal of multiple and different addresses simultaneously.
Further, in the communication process of each of multiple transmitting terminals of multiple access access transmitting terminal and receiving end, The data acquisition control signal that transmitting terminal is sent according to receiving end reads operation data file from target grid equipment, it is encrypted and Receiving end is transferred to after dividing processing, receiving end carries out mistake to the received each data packet of institute using CRC cyclic redundancy check Verification, and coordinate to transmit the data packet being not successfully received again using automatic repeat request ARQ mechanism, it ensure that all data Packet is repeated, and improves the accuracy of data transmission；Meanwhile after the correct end of transmission of all data packets, receiving end is adopted Completeness check is carried out to entire file with the verification of MD5 Message Digest 5, improves the reliability of transmission, it is final realize accurately, Efficiently, the acquisition and wireless transmission of safe and reliable grid equipment operation data.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention Example can be practiced without these specific details.In some instances, well known method, structure is not been shown in detail And technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of the various inventive aspects, Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention：It is i.e. required to protect Shield the present invention claims features more more than feature expressly recited in each claim.More precisely, as following Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore, Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself All as a separate embodiment of the present invention.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose It replaces.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is of the invention Within the scope of and form different embodiments.For example, in detail in the claims, embodiment claimed it is one of any Can in any combination mode come using.
Various component embodiments of the invention can be implemented in hardware, or to run on one or more processors Software module realize, or be implemented in a combination thereof.It will be understood by those of skill in the art that can be used in practice Microprocessor or digital signal processor (DSP) realize the acquisition of grid equipment operation data according to an embodiment of the present invention The some or all functions of some or all components in system.The present invention is also implemented as being retouched here for executing The some or all device or device programs (for example, computer program and computer program product) for the method stated. It is such to realize that program of the invention can store on a computer-readable medium, or can have one or more signal Form.Such signal can be downloaded from an internet website to obtain, be perhaps provided on the carrier signal or with it is any its He provides form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims, Any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not Element or step listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of multiple such Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real It is existing.In the unit claims listing several devices, several in these devices can be through the same hardware branch To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame Claim.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes It is set to and covers all such other variations or modifications.

Claims (12)

1. a kind of acquisition methods of grid equipment operation data, which is characterized in that the method passes through multiple applied to receiving end Transmitting terminal obtains the operation data of one or more grid equipments, the mutual not phase of the internet protocol address of the multiple transmitting terminal Together, and each of the multiple transmitting terminal connects one or more grid equipments, the method includes：
The receiving end successively sends the connection request signal for carrying different IP address informations to the multiple transmitting terminal；
After each of the multiple transmitting terminal receives the connection request signal every time, the connection request signal is read In IP address information, and be compared with the IP address of itself, both judge it is whether identical, if it is not, then keeping listening state； If so, send connection response signal to the receiving end to access the communication link with the receiving end, and with the reception End communication obtains the operation data of one or more grid equipments to realize the receiving end from the transmitting terminal；Wherein, described Section connects each of access and multiple transmitting terminals of the communication link of the receiving end transmitting terminal with described in different times Receiving end is communicated.
2. the method according to claim 1, wherein the access is multiple with the communication link of the receiving end Each of transmitting terminal transmitting terminal and the communication process of the receiving end include：
After the receiving end receives the connection response signal of the transmitting terminal, is sent to the transmitting terminal and carry target grid equipment volume Number and filename data acquisition control signal；
After the transmitting terminal receives the data acquisition control signal, specified protocol is passed through according to the data acquisition control signal Read operation data file is encrypted in the operation data file for reading the target grid equipment, and will add For file division after close at N number of data packet, N is the integer greater than 1；
The transmitting terminal sends the data acquisition feedback signal for carrying the information that data packet total number is N to the receiving end；
The receiving end acquires feedback signal to the transmitting after receiving the data acquisition feedback signal, according to the data End sends data packet request signal；
The transmitting terminal after receiving the data packet request signal, to the receiving end one by one sequentially send carrying package serial number and First of first information of check code is to n-th data packet；
The receiving end receive described first to after each of n-th data packet data packet, read it is described each The first check code and packet serial number in data packet are verified to obtain according to first check code to each described data packet First check results and the corresponding preservation packet serial number and first check results；
The transmitting terminal sends to the receiving end after having sent the n-th data packet and carries the of the second information of check code One end of transmission feedback signal；
After the receiving end receives first end of transmission feedback signal, received data is successively inquired according to packet serial number First check results of packet, judge whether current data packet has been properly received according to first check results, if so, into Judgement of the row to next data packet, if it is not, sending the retransmission request letter for the packet serial number for carrying current data packet to the transmitting terminal Number；
After the transmitting terminal receives the retransmission request signal, is sent and carried to the receiving end according to the retransmission request signal The data packet of the packet serial number of transmitted data packet and first check code；
After the receiving end receives the data packet, the first check code and packet serial number in the data packet are read, according to institute It states the first check code and packet serial number verifies the data packet to obtain the second check results, according to second check results Judge whether the current data packet has been properly received, if so, carrying out according to first check results to next data packet Judgement；If it is not, the retransmission request signal for carrying the packet serial number of current data packet is sent to the transmitting terminal again, until described current Data packet has been properly received；
The receiving end and the transmitting terminal repeat the judgement and retransmissions steps of the data packet, until all data packets have succeeded It receives；
The receiving end merges the received all data packets of institute and obtains data file, according to second check code to the data File carries out completeness check, the result for judging the completeness check and second in first end of transmission feedback signal Whether check code is consistent, if it is not, the data packet request signal is sent to the transmitting terminal again, if so, institute is received all Local file is written in data packet, sends the second end of transmission feedback signal to the transmitting terminal.
3. according to the method described in claim 2, it is characterized in that, first check code is CRC cyclic redundancy check code；
The data packet is verified according to first check code to obtain the first check results, including：
CRC cyclic redundancy check is carried out to the data packet and obtains CRC cyclic redundancy check result.
4. according to the method described in claim 3, it is characterized in that, according to first check code and packet serial number to the data Packet is verified to obtain the second check results, judges whether the current data packet has successfully connect according to second check results It receives, including：
CRC cyclic redundancy check is carried out to the data packet and in more read packet serial number and the retransmission request signal Packet serial number；
If CRC cyclic redundancy check result packet serial number consistent and read with the CRC cyclic redundancy check code It is consistent with the packet serial number in the retransmission request signal, then judge that the current data packet has been properly received；
If the CRC cyclic redundancy check result and the CRC cyclic redundancy check code is inconsistent or read packet serial number with Packet serial number in the retransmission request signal is inconsistent, then judges that the current data packet is not successfully received.
5. according to the method described in claim 2, it is characterized in that, second check code is the verification of MD5 Message Digest 5 Code, the completeness check are the verifications of MD5 Message Digest 5.
6. according to the method described in claim 2, being adopted it is characterized in that, sending the data to the transmitting terminal in the receiving end Before set control signal, further include：
The received signal to noise ratio SNR respectively received under frequency in current frequency range, the receiving end are detected in the transmitting terminal and the receiving end The optimal reception frequency of the receiving end, and the transmitting terminal are chosen according to itself each received signal to noise ratio SNR received under frequency Most according to itself each received signal to noise ratio SNR received under frequency and optimal reception frequency selection purposes transmitting terminal of the receiving end Excellent reception frequency, wherein the optimal reception frequency of the transmitting terminal is not equal to the optimal reception frequency of the receiving end；
The transmitting terminal adjusts separately the transmission frequency of itself and reception frequency for the optimal reception frequency of the receiving end and this The optimal reception frequency of transmitting terminal, and the transmission frequency of itself and reception frequency are adjusted to the transmitting terminal by the receiving end The optimal optimal reception frequency for receiving frequency and this receiving end.
7. a kind of acquisition system of grid equipment operation data, which is characterized in that including：Multiple transmitting terminals and receiving end；
The internet protocol address of the multiple transmitting terminal is different, and each of the multiple transmitting terminal wraps It includes：Data acquisition and processing (DAP) unit is connect with one or more grid equipments, for adopting from one or more of grid equipments Collection data are simultaneously handled data collected, and
First Transmit Receive Unit is connected with the data acquisition and processing (DAP) unit, for carrying out signal friendship with the receiving end Mutually and to the receiving end send data；
The receiving end obtains the operation data of one or more grid equipments, and the reception by the multiple transmitting terminal End includes：Second Transmit Receive Unit, with the first Transmit Receive Unit of each of the multiple transmitting terminal transmitting terminal without Line connection, for carrying out signal interaction with the transmitting terminal and from transmitting terminal reception data, and
Data processing and control unit are connect with second Transmit Receive Unit, for by the second radio-frequency receiving-transmitting list The received data of member are handled and generate control signal；
When the receiving end obtains the operation data of one or more grid equipments by the multiple transmitting terminal, the reception End successively sends the connection request signal for carrying different IP address informations to the multiple transmitting terminal；
After each of the multiple transmitting terminal receives the connection request signal every time, the connection request signal is read In IP address information, and be compared with the IP address of itself, both judge it is whether identical, if it is not, then keeping listening state； If so, send connection response signal to the receiving end to access the communication link with the receiving end, and with the reception End communication obtains the operation data of one or more grid equipments to realize the receiving end from the transmitting terminal；Wherein, described Section connects each of access and multiple transmitting terminals of the communication link of the receiving end transmitting terminal with described in different times Receiving end is communicated.
8. system according to claim 7, which is characterized in that the access is multiple with the communication link of the receiving end Each of transmitting terminal transmitting terminal and the communication process of the receiving end include：
After the receiving end receives the connection response signal of the transmitting terminal, is sent to the transmitting terminal and carry target grid equipment volume Number and filename data acquisition control signal；
After the transmitting terminal receives the data acquisition control signal, specified protocol is passed through according to the data acquisition control signal Read operation data file is encrypted in the operation data file for reading the target grid equipment, and will add For file division after close at N number of data packet, N is the integer greater than 1；
The transmitting terminal sends the data acquisition feedback signal for carrying the information that data packet total number is N to the receiving end；
The receiving end acquires feedback signal to the transmitting after receiving the data acquisition feedback signal, according to the data End sends data packet request signal；
The transmitting terminal after receiving the data packet request signal, to the receiving end one by one sequentially send carrying package serial number and First of first information of check code is to n-th data packet；
The receiving end receive described first to after each of n-th data packet data packet, read it is described each The first check code and packet serial number in data packet are verified to obtain according to first check code to each described data packet First check results and the corresponding preservation packet serial number and first check results；
The transmitting terminal sends to the receiving end after having sent the n-th data packet and carries the of the second information of check code One end of transmission feedback signal；
After the receiving end receives first end of transmission feedback signal, received data is successively inquired according to packet serial number First check results of packet, judge whether current data packet has been properly received according to first check results, if so, into Judgement of the row to next data packet, if it is not, sending the retransmission request letter for the packet serial number for carrying current data packet to the transmitting terminal Number；
After the transmitting terminal receives the retransmission request signal, is sent and carried to the receiving end according to the retransmission request signal The data packet of the packet serial number of transmitted data packet and first check code；
After the receiving end receives the data packet, the first check code and packet serial number in the data packet are read, according to institute It states the first check code and packet serial number verifies the data packet to obtain the second check results, according to second check results Judge whether the current data packet has been properly received, if so, carrying out according to first check results to next data packet Judgement；If it is not, the retransmission request signal for carrying the packet serial number of current data packet is sent to the transmitting terminal again, until described current Data packet has been properly received；
The receiving end and the transmitting terminal repeat the judgement and retransmissions steps of the data packet, until all data packets have succeeded It receives；
The receiving end merges the received all data packets of institute and obtains data file, according to second check code to the data File carries out completeness check, the result for judging the completeness check and second in first end of transmission feedback signal Whether check code is consistent, if it is not, the data packet request signal is sent to the transmitting terminal again, if so, institute is received all Local file is written in data packet, sends the second end of transmission feedback signal to the transmitting terminal.
9. system according to claim 8, which is characterized in that first check code is CRC cyclic redundancy check code；
The receiving end is also used to：
CRC cyclic redundancy check is carried out to the data packet and obtains CRC cyclic redundancy check result.
10. system according to claim 9, which is characterized in that the receiving end is also used to：
After receiving the transmitting terminal and responding the data packet that the retransmission request signal is sent, CRC is carried out to the data packet and is followed Packet serial number in ring redundancy check and more read packet serial number and the retransmission request signal；
If CRC cyclic redundancy check result packet serial number consistent and read with the CRC cyclic redundancy check code It is consistent with the packet serial number in the retransmission request signal, then judge that the current data packet has been properly received；
If the CRC cyclic redundancy check result and the CRC cyclic redundancy check code is inconsistent or read packet serial number with Packet serial number in the retransmission request signal is inconsistent, then judges that the current data packet is not successfully received.
11. system according to claim 8, which is characterized in that second check code is the verification of MD5 Message Digest 5 Code, the completeness check are the verifications of MD5 Message Digest 5.
12. system according to claim 8, which is characterized in that the transmitting terminal and the receiving end are also used to：
Before the receiving end sends the data acquisition control signal to the transmitting terminal, the transmitting terminal and receiving end inspection The received signal to noise ratio SNR respectively received under frequency is surveyed in current frequency range, and the receiving end is according to itself each reception received under frequency Signal to Noise Ratio (SNR) chooses the optimal reception frequency of the receiving end, and the transmitting terminal is according to itself each reception received under frequency The optimal reception frequency of Signal to Noise Ratio (SNR) and the optimal reception frequency selection purposes of the receiving end transmitting terminal, the wherein transmitting terminal The optimal optimal reception frequency for receiving frequency and being not equal to the receiving end；
The transmitting terminal adjusts separately the transmission frequency of itself and reception frequency for the optimal reception frequency of the receiving end and this The optimal reception frequency of transmitting terminal, and the transmission frequency of itself and reception frequency are adjusted to the transmitting terminal by the receiving end The optimal optimal reception frequency for receiving frequency and this receiving end.
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Application publication date: 20181123