CN110380923A - Site element protection looped network test device - Google Patents
Site element protection looped network test device Download PDFInfo
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- CN110380923A CN110380923A CN201910501904.5A CN201910501904A CN110380923A CN 110380923 A CN110380923 A CN 110380923A CN 201910501904 A CN201910501904 A CN 201910501904A CN 110380923 A CN110380923 A CN 110380923A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- Computer Networks & Wireless Communication (AREA)
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- Computer Security & Cryptography (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Present applicant proposes site element protection looped network test devices, and including the dual-CPU architecture being made of host CPU and looped network CPU, host CPU is used for implementation of test cases；Looped network CPU and host CPU commutative ring network packet content, it receives host CPU looped network test command and looped network test data is issued to looped network digital signal processor, it is communicated via the gigabit ethernet interface that looped network FPGA is expanded with looped network, completes looped network packet parsing, forwarding and simulation handset looped network message and send.Looped network message framing is carried out by way of parsing looped network configuration text and adaptive acquisition looped network message shaping value; realize the decoupling test of site distribution separate unit handset complete preservation function; handset looped network performance test function is realized at the same time as looped network Network Analyzer; the blank of site element protection distribution handset looped network testing field has effectively been filled up, has been had laid a good foundation for the maintenance and test of the protection of site distributed element from now on.
Description
Technical field
The invention belongs to power grid testing field more particularly to site element protection looped network test devices.
Background technique
It is basic that the successful linked network of route site protection for element protection provides good theory and practice, while in order to
It solves the problems, such as that element protection exists across interval, different voltage grade, proposes distributed local element protection at state's net protection
Implementation.Distributed element protection scheme one or more site distributed protection handset by being made of, between each handset
Equal, shared information, synthetic operation.
The hardware and software of each estrade machine of element protection are completely the same, and defencive function and protection definite value are identical, pass through device
Handset number in parameter is distinguished, and in addition can increase and decrease handset quantity according to on-site actual situations.As shown in Figure 1, each handset
It as independent protective unit, is joined end to end by bidirectional redundancy Crossed Circle gigabit Ethernet, is responsible for transmission, the filtering of respective message
And forwarding.The analog quantity that the machine acquires, intake are according to fixed format formed looped network message frame and sent by handset, are connect simultaneously
The looped network message for receiving other handsets in looped network, with the machine collection capacity as main protection and back-up protection distinguishing rule after parsing,
It is responsible for local tripping to execute.Looped network message uses fixed format, as shown in Figure 2.Destination address is unified under multicast transmission mode
It is set as FF.FF.FF.FF.FF.FF, when unicast transmission mode is target handset address；Source address is made of 6 bytes, packet
Include looped network mark, mounting means, protection type, device numbering；Looped network class type-word DSR EtherType=0x892F；PathID
Field is made of the LanID of NetID and 1 position of 3 positions, wherein preceding 3 NetID are used to indicate different looped networks；Most end
The LanID of position indicates looped network direction, can be arranged to 0 or 1, sends network interface (A=0, B=1) for indicating；Application identities are by 2
A byte composition, high byte indicate the protection type of equipment, and low byte indicates device numbering；Delay amendment domain (FTCF) is 32
Signless integer, Bit30 are quality position, and Bit0~23 are delay time, other positions are reserved bit；APDU is combined by 3 ASDU
It forms, each ASDU is the independent data section of unified definition, defines 3 different ASDU types in specification, passes through ASDU class
The data content of type (TAG) identification transmission, 3 application datas are respectively sampled value, (shaping value is for switching value and shaping value
Handset relay settings verification and, all handset shaping values must be consistent in looped network).It is directed to distributed local element at present
There are mainly two types of the test modes of protection: one, building entire element protection and operate normally environment, more estrade machines are realized interconnection, pressed
According to the facts border running environment is tested；Two, separate unit handset is independently tested with traditional test device for relay protection.First
The test of kind method comprehensively, is consistent with practical operation situation, but it is inconvenient to test environmental structure, and needs are simultaneously to more estrades
Machine applies energizing quantity could full simulation defencive function；Although second way test is easy, since testing tool is limited, only
Can be carried out separate unit handset part defencive function test, can not analog loop network data, it is distinct with real system running environment.
Summary of the invention
In order to solve shortcoming and defect existing in the prior art, the embodiment of the present invention proposes site element protection ring
Net test device passes through CAN bus between host CPU and looped network CPU including the dual-CPU architecture being made of host CPU and looped network CPU
It is communicated, keeps clock synchronous by clock synchronization bus communication, in the test device:
Host CPU is used for implementation of test cases, will include use-case state and data discrete into analog quantity, switching value, looped network number
It issues by CAN bus that realization is synchronous to be executed according to output content corresponding with output unit inside, while receiving and feeding back to
Information is handled；
Looped network CPU and host CPU commutative ring network packet content receive host CPU looped network test command and by looped network test data
It is issued to looped network digital signal processor, looped network digital signal processor carries out parallel processing and in real time meter to sample channel data
It calculates, is communicated via the gigabit ethernet interface that looped network FPGA is expanded with looped network, complete looped network packet parsing, forwarding and simulation
Handset looped network message is sent.
Optionally, in the test device: carrying out looped network message transmissions, the looped network between looped network CPU and host CPU
Message transmissions use Adaptive Transmission mode.
Optionally, the Adaptive Transmission mode includes:
Looped network CPU determines looped network message according to each field definition of applying unit in configuration text by parsing configuration text
Format, length；
The looped network message that other equipment issue in looped network is uninterruptedly received and parsed through, shaping value numerical value is obtained and is saved, together
When real-time update；
According to source handset number and quantity in configuration text, determine that each interrupt cycle needs looped network message number to be simulated
Amount；
By shaping value numerical fitting into needing in looped network message to be simulated, sampled value, switch numerical quantity are set in applying unit
0, looped network message is issued in interrupting service by looped network FPGA；
After looped network CPU receives the discrete data of host CPU looped network test, by data distributing looped network digital signal processor,
It is calculated by digital signal processor, after receiving host CPU and starting the order exported, calculated data is fitted into looped network
Start to export at whole moment second in application of electronic report unit；
After host CPU is completed or received in output stops the order of output, by sampled value in looped network application of electronic report unit, open
It closes numerical quantity and sets 0 again.
Optionally, the test device includes: for realizing looped network performance test, the looped network performance test
It seals in looped network as looped network Network Analyzer, forwards all messages and the various looped network type reports of simulation in looped network
Text, and test target handset message is parsed.
Optionally, the test host for testing the delay of handset looped network message transmissions is equipped in the test device, it is described
Test handset looped network message transmissions, which are delayed, includes:
Lock-out pulse analog quantity is sent to tested handset, records sending instant, while receiving tested handset looped network message, note
Record receives the message moment of looped network lock-out pulse, and the time difference sent and received is the delay of handset looped network message transmissions.
Optionally, described to be equipped with for testing handset looped network message data consistency, the test handset looped network message number
Include: according to the step of consistency
It gives tested handset and test device to apply analog quantity and switching value using external high-precision relay-protection tester, surveys
Trial assembly sets while receiving tested handset looped network message；
Test device acquires tested handset sampled data, the waveform locally acquired with test device by receiving looped network message
On the basis of, calculate the relative error of tested handset single-revolution wave sampled data phase and amplitude；
It is overturn when external tester applies switching value per the whole second, then the looped network message switch that test device receives
Amount data and the data time difference locally acquired are relatively fixed
Optionally, the step of test device forwards characteristic for testing handset, and the test handset forwards characteristic is wrapped
It includes:
Tested handset and test device are only accessed in looped network, eliminate issuable shadow during other handsets E-Packet
It rings.Test device simulation sends all types of message frames, comprising: normal message frame, equipment repeating frame, using repeating frame, network wind
Sudden and violent frame, message format error frame, looped network class type-word error frame, APPID error frame, check code error frame, through tested handset forwarding
After receive, differentiate forwarding correctness.
Technical solution provided by the invention has the benefit that
It is proposed the hardware structure of host CPU and looped network CPU, defencive function test independently cooperates again with looped network test, leads to
It crosses parsing looped network configuration text and the adaptive mode for obtaining looped network message shaping value carries out looped network message framing, realize on the spot
The decoupling test for changing distributed separate unit handset complete preservation function, realizes handset looped network at the same time as looped network Network Analyzer
Can test function, filled up the blank of site element protection distribution handset looped network testing field, effectively for from now on the spot
The maintenance and test for changing distributed element protection are had laid a good foundation.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical solution of the present invention
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the site distributed looped network topological diagram proposed in the application background technique；
Fig. 2 is the looped network application of electronic report frame format figure proposed in the application background technique；
Fig. 3 is the test device hardware architecture diagram that the embodiment of the present application proposes；
Fig. 4 is the looped network message configuration text figure that the embodiment of the present application proposes；
Fig. 5 is the defencive function decoupling test chart that the embodiment of the present application proposes；
Fig. 6 is the looped network message transmissions delay timing diagram that the embodiment of the present application proposes；
Fig. 7 is the lock-out pulse timing diagram that the embodiment of the present application proposes；
Fig. 8 is the test device sample waveform figure that the embodiment of the present application proposes；
Fig. 9 is the message transmitted test scheme that the embodiment of the present application proposes.
Specific embodiment
To keep structure and advantage of the invention clearer, structure of the invention is made further below in conjunction with attached drawing
Description.
Embodiment one
Present invention aims at a kind of site element protection looped network test device is developed, has traditional relay protection test
While function increase newly looped network test function, in looped network message framing can adaptive shaping value numerical value constantly change, pass through one
The decoupling test and looped network performance of distributed local element protection separate unit handset defencive function can be completed in platform test device
Test solves the existing test problem of distributed local element protection.
Specifically, the site element protection looped network test device that the present embodiment is proposed, as shown in figure 3, including by leading
The dual-CPU architecture that CPU and looped network CPU is constituted, is communicated between host CPU and looped network CPU by CAN bus, total by clock synchronization
Line communication keeps clock synchronous, in the test device:
Host CPU is used for implementation of test cases, will include use-case state and data discrete into analog quantity, switching value, looped network number
It issues by CAN bus that realization is synchronous to be executed according to output content corresponding with output unit inside, while receiving and feeding back to
Information is handled；
Looped network CPU and host CPU commutative ring network packet content receive host CPU looped network test command and by looped network test data
It is issued to looped network digital signal processor, looped network digital signal processor carries out parallel processing and in real time meter to sample channel data
It calculates, is communicated via the gigabit ethernet interface that looped network FPGA is expanded with looped network, complete looped network packet parsing, forwarding and simulation
Handset looped network message is sent.
In an implementation, looped network configuration text as shown in figure 4,
Test mode in test function can be set as tester or analyzer, tester conduct according to testing requirement
Defencive function test device can simulate more estrade machine looped network messages and relay protection test function, realize to monomer handset
Defencive function decoupling test is carried out, test device can be sealed in looped network and be forwarded as looped network Network Analyzer by analyzer
All messages and the various looped network type messages of simulation in looped network, and test target handset message is parsed, realize looped network
Various performance tests；It is unicast or multicast that Transmission mode, which is used to choose transmission mode,；
Destination number setting test target handset quantity and number in message configuration；Source
The handset quantity and number of number setting simulation；Protection type is the protection type in source address, mounting means one
As it is fixed, together constitute with source address with source device handset number and looped network type；PathID in message has according to looped network FPGA
The network interface that body issues is configured；APPID is the application identities in looped network message；
It is single that SV channels, GOOSE channels, Int channels in applying unit are respectively intended to setting application
Member sampled value, switching value, shaping value channel.
As shown in figure 5, more estrade machine looped network messages and routine can be simulated when test device realizes defencive function test
Analog quantity, switching value are tested handset definite value by MMS network amendment, and readback is tested handset movement SOE and hard contact information,
Differentiate whether tested handset action situation is correct, realizes that the decoupling for carrying out defencive function to monomer handset is tested.Test device is made
For looped network Network Analyzer, the delay of handset looped network message transmissions is tested.As shown in fig. 6, test device applies mould to tested handset
It analog quantity and opens into receiving handset message, transmission delay Td=T1+Tstay+Tlink1+Tlink2 from looped network again.Wherein T1 is
Message framing delay, handset receive secondary analog quantity sampled by itself and intake etc. be fitted to together looped network message send
The time gone out mainly is handled by AD sampling and CPU and sends caused delay.In looped network message by the delay separately as
One analog quantity channel.Tstay is handset residence time, is to be added up to cause by the residence time in intermediate node handset repeating process
Delay.Tlink is link delay, the delay generated by looped network message from source handset to link transmission target handset.
Tstay+Tlink1 constitutes the message delay in looped network message and corrects domain (FTCF), is carried by message itself, through middle node idea
Machine is modified when forwarding.Quickly due to spread fiber speed, close to the 2/3 of the light velocity, optical fiber used in test only has 10m,
Transmission time is very short, and link delay Tlink2 can not considered.Test device is analogized in target handset access looped network, is surveyed
Trial assembly is set keeps clock synchronous with the external same clock synchronization source of source handset.Test device applies analog quantity lock-out pulse to source handset,
As shown in fig. 7, recording lock-out pulse output time t1, and synchronous reception looped network message analog quantity, the mould received is recorded
Td ' is compared by analog quantity lock-out pulse moment t2, Td '=t2-t1 then actual message is absolutely delayed with Td, is differentiated exhausted
To the accuracy of delay.
Optionally, in the test device: carrying out looped network message transmissions, the looped network between looped network CPU and host CPU
Message transmissions use Adaptive Transmission mode.The Adaptive Transmission mode includes:
Looped network CPU determines looped network message according to each field definition of applying unit in configuration text by parsing configuration text
Format, length；The looped network message that other equipment issue in looped network is uninterruptedly received and parsed through, shaping value numerical value is obtained and is saved,
Real-time update simultaneously；According to source handset number and quantity in configuration text, determine that each interrupt cycle needs looped network report to be simulated
Literary quantity；By shaping value numerical fitting into needing in looped network message to be simulated, sampled value, switch numerical quantity set 0 in applying unit,
Looped network message is issued in interrupting service by looped network FPGA；After looped network CPU receives the discrete data of host CPU looped network test,
It by data distributing looped network digital signal processor, is calculated by digital signal processor, starts the life exported receiving host CPU
After order, calculated data are fitted into starting to export at whole moment second in looped network application of electronic report unit；When output complete or
After receiving the order that host CPU stops output, sampled value, switch numerical quantity in looped network application of electronic report unit are set 0 again.
In an implementation, looped network CPU is by parsing configuration text, according to applying unit SV channels in configuration text,
GOOSE channels, Int channels, which are defined, determines looped network message format, length；It is true according to Destination number
The handset that sets the goal number, uninterruptedly receives and parses through the looped network message of target handset transmission, obtains shaping value numerical value and saves, together
When real-time update；According to the number and quantity of Source number, determine that each interrupt cycle needs looped network message number to be simulated
Amount；By shaping value numerical fitting into needing in looped network message to be simulated, sampled value, switch numerical quantity set 0 in applying unit, by ring
Net FPGA issues looped network message in interrupting service.After looped network CPU receives the discrete data of host CPU looped network test, it will count
According to looped network DSP is issued, calculated by DSP, receive host CPU start output order after, by calculated data be fitted into
Start to export at whole moment second in looped network application of electronic report unit；After host CPU is completed or is received in output stops the order of output,
Sampled value, switch numerical quantity in looped network application of electronic report unit are set 0 again.
Optionally, the test device includes: for realizing looped network performance test, the looped network performance test
It seals in looped network as looped network Network Analyzer, forwards all messages and the various looped network type reports of simulation in looped network
Text, and test target handset message is parsed.
Optionally, the test host for testing the delay of handset looped network message transmissions is equipped in the test device, it is described
Test handset looped network message transmissions, which are delayed, includes:
Lock-out pulse analog quantity is sent to tested handset, records sending instant, while receiving tested handset looped network message, note
Record receives the message moment of looped network lock-out pulse, and the time difference sent and received is the delay of handset looped network message transmissions.It can
Choosing, it is described to be equipped with for testing handset looped network message data consistency, the test handset looped network message data consistency
Step includes:
It gives tested handset and test device to apply analog quantity and switching value using external high-precision relay-protection tester, surveys
Trial assembly sets while receiving tested handset looped network message；
Test device acquires tested handset sampled data, the waveform locally acquired with test device by receiving looped network message
On the basis of, calculate the relative error of tested handset single-revolution wave sampled data phase and amplitude；
It is overturn when external tester applies switching value per the whole second, then the looped network message switch that test device receives
Amount data and the data time difference locally acquired are relatively fixed
In an implementation, using external high-precision relay-protection tester give tested handset and test device apply analog quantity and
It opens into test device receives tested handset looped network message simultaneously.Since handset needs for sampled data to be converted into looped network data hair
It send and is forwarded by other handsets, the looped network analog quantity that test device receives has delay.Estrade machines more for looped network inside
And test device is by identical source sampling, the collected waveform of test device and to receive analog quantity waveform as shown in Figure 8.
Test device calculates the phase and amplitude of tested handset single-revolution wave sampled data by fast Fourier (FFT), and to test dress
Setting (must calibrate the sampling functions of test device before test) on the basis of the waveform locally acquired.Assuming that test device is local
The amplitude for acquiring waveform is Z0, phase angle θ0, being tested test device in the same time and receiving the amplitude of 1 looped network SV of handset is Z1, phase angle
For θ1, absolutely delay is Td1, then angular difference Δ θ1With than poor k1Are as follows:
Wherein: phase angular unit is ', timer is μ s.The angular difference Δ θ of tested handset 2 can similarly be acquired2With than poor k2.It is right
It can be compared by angular difference Δ θ and than poor k in the sampling precision of handset each in looped network.Synchronism between handset can be used
Opposite angular difference differentiates: Δ θ12=Δ θ1-Δθ2。
Optionally, the step of test device forwards characteristic for testing handset, and the test handset forwards characteristic is wrapped
It includes:
Tested handset and test device are only accessed in looped network, eliminate issuable shadow during other handsets E-Packet
It rings.Test device simulation sends all types of message frames, comprising: normal message frame, equipment repeating frame, using repeating frame, network wind
Sudden and violent frame, message format error frame, looped network class type-word error frame, APPID error frame, check code error frame, through tested handset forwarding
After receive, differentiate forwarding correctness.
In an implementation, test device tests handset and forwards looped network characteristic as looped network Network Analyzer.Test device and quilt
Clamp mechanism is surveyed into looped network, does not access other handsets, the influence of other handsets forwarding is eliminated, is sent from test device to tested handset
All types of looped network messages differentiate the accuracy of forwarding to test device another port after handset forwards.Using multicast transmission side
The transmitted test scheme of formula can refer to Fig. 9 progress.
Each serial number in above-described embodiment is for illustration only, the assembling for not representing each component or the elder generation in use process
Sequence afterwards.The above description is only an embodiment of the present invention, is not intended to limit the invention, it is all the spirit and principles in the present invention it
Interior, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (7)
1. site element protection looped network test device, including the dual-CPU architecture being made of host CPU and looped network CPU, host CPU with
It is communicated between looped network CPU by CAN bus, keeps clock synchronous by clock synchronization bus communication, which is characterized in that described
In test device:
Host CPU is used for implementation of test cases, will include that use-case state and data discrete exist at analog quantity, switching value, looped network data
Interior output content corresponding with output unit issues that realization is synchronous to be executed by CAN bus, while receiving the information that feeds back to
It is handled；
Looped network CPU and host CPU commutative ring network packet content receive host CPU looped network test command and issue looped network test data
To looped network digital signal processor, looped network digital signal processor carries out parallel processing to sample channel data and calculates in real time,
It is communicated via the gigabit ethernet interface that looped network FPGA is expanded with looped network, completes looped network packet parsing, forwarding and analog submodule
Machine looped network message is sent.
2. site element protection looped network test device according to claim 1, which is characterized in that in the test device
In: looped network message transmissions are carried out between looped network CPU and host CPU, the looped network message transmissions use Adaptive Transmission mode.
3. site element protection looped network test device according to claim 2, which is characterized in that the Adaptive Transmission
Mode includes:
Looped network CPU by parsing configuration text, according to each field definition of applying unit in configuration text determine looped network message format,
Length；
The looped network message that other equipment issue in looped network is uninterruptedly received and parsed through, shaping value numerical value is obtained and is saved, while is real
Shi Gengxin；
According to source handset number and quantity in configuration text, determine that each interrupt cycle needs looped network message amount to be simulated；
By shaping value numerical fitting into needing in looped network message to be simulated, sampled value, switch numerical quantity set 0 in applying unit, by
Looped network FPGA issues looped network message in interrupting service；
After looped network CPU receives the discrete data of host CPU looped network test, by data distributing looped network digital signal processor, by counting
Word signal processor is calculated, and after receiving host CPU and starting the order exported, calculated data are fitted into looped network message
Start to export at whole moment second in applying unit；
After host CPU is completed or received in output stops the order of output, by sampled value, switching value in looped network application of electronic report unit
Numerical value sets 0 again.
4. site element protection looped network test device according to claim 1, which is characterized in that the test device is used
In realization looped network performance test, the looped network performance test includes:
It seals in looped network as looped network Network Analyzer, forwards all messages and the various looped network type messages of simulation in looped network,
And test target handset message is parsed.
5. site element protection looped network test device according to claim 1, which is characterized in that in the test device
Equipped with the test host for testing the delay of handset looped network message transmissions, the test handset looped network message transmissions delay includes:
Lock-out pulse analog quantity is sent to tested handset, records sending instant, while receiving tested handset looped network message, record connects
The message moment of looped network lock-out pulse is received, the time difference sent and received is the delay of handset looped network message transmissions.
6. site element protection looped network test device according to claim 1, which is characterized in that described to be equipped with for surveying
The step of swab machine looped network message data consistency, the test handset looped network message data consistency includes:
Tested handset and test device is given to apply analog quantity and switching value, test dress using external high-precision relay-protection tester
It sets while receiving tested handset looped network message；
Test device acquires tested handset sampled data by receiving looped network message, and the waveform locally acquired using test device is base
Standard calculates the relative error of tested handset single-revolution wave sampled data phase and amplitude；
It is overturn when external tester applies switching value per the whole second, then the looped network message switch amount number that test device receives
According to relatively fixed with the data time difference that locally acquires.
7. site element protection looped network test device according to claim 1, which is characterized in that the test device is used
Include: in the step of test handset forwarding characteristic, the test handset forwarding characteristic
Tested handset and test device are only accessed in looped network, eliminate issuable influence during other handsets E-Packet；
Test device simulation sends all types of message frames, comprising: normal message frame, equipment repeating frame, using repeating frame, network wind
Sudden and violent frame, message format error frame, looped network class type-word error frame, APPID error frame, check code error frame, through tested handset forwarding
After receive, differentiate forwarding correctness.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025049A (en) * | 2019-11-27 | 2020-04-17 | 中国电力科学研究院有限公司 | System and method for detecting performance of in-situ distributed element protection device |
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