CN205670180U - Based on zero sequence transient analysis low current neutral grounding system fault alignment system - Google Patents
Based on zero sequence transient analysis low current neutral grounding system fault alignment system Download PDFInfo
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- CN205670180U CN205670180U CN201620375253.1U CN201620375253U CN205670180U CN 205670180 U CN205670180 U CN 205670180U CN 201620375253 U CN201620375253 U CN 201620375253U CN 205670180 U CN205670180 U CN 205670180U
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Abstract
This utility model is open based on zero sequence transient analysis low current neutral grounding system fault alignment system, including twin coil line-failure indicator, data concentrator and back-stage management platform, twin coil line-failure indicator is connected with data concentrator by communication link, and data concentrator is connected with back-stage management platform by communication network；Network link device systems, FTP client FTP, database server and application server it is provided with in back-stage management platform, the system of client is connected with database server and application server by network link device systems, database server is connected with application server by network link device systems, and network link device systems is connected with data concentrator by communication network；Utilize Clock Synchronization Technology, micro power consumption wireless mechanics of communication, zero sequence transient analysis technology to complete the zero-sequence current synthesis of each branch node of distribution networking, the admission of zero sequence transient-wave, and deliver to back-stage management platform and carry out analysis and the judgement of trouble point.
Description
Technical field
This utility model relates to Power System Intelligent technical field, specifically, is based on the little electricity of zero sequence transient analysis
Stream grounding system fault alignment system.
Background technology
Power system by the equipment such as generating, power transformation, transmission of electricity, distribution, power supply, electricity consumption and technology form by primary energy
Be converted to the unified entirety of electric energy.After electric energy is sent by power plant, deliver to electric power by electric substations at different levels through grid and use
Side, family, then supplies user through power distribution network.In general, 110kV above network belongs to power transmission network, 6～66kV electricity
Pressure grade belongs to power distribution network.Power distribution network is the important component part of power system, as end in the links of power system
End is directly associated with user.Neutral point in electric power system refers to the transformator of Y-connection or the neutral point of electromotor.Power train
System neutral point whether ground connection and how ground connection relates to dielectric level, Communication Jamming, ground protection mode, electric pressure, is
The synthtic price index of the system many aspects such as wiring and system stability.Medium voltage distribution network generally uses neutral point not direct grounding way,
Its neutral grounding mode mainly has four kinds, i.e. isolated neutral mode, neutral by arc extinction coil grounding mode, neutral point
Through high grounding, Neutral Point Through Low Resistance mode.
6～66kV power distribution networks of China's power system belong to small current neutral grounding system more, typically use isolated neutral
Or the working method of neutral by arc extinction coil grounding, when there is earth fault because of it, the electric current flowing through earth point is little, also known as
System with non effectively earth ed neutral.Earth fault refer to due to conductor be connected to ground or insulation against ground resistance become less than setting
And the fault caused.
According to the fault statistics of Operation of Electric Systems department, due to the shadow of extraneous factor (such as thunderbolt, strong wind, birds etc.)
Ringing, one-phase earthing failure in electric distribution network is modal in distribution network failure, and incidence rate is the highest, accounts for whole electric short circuit fault
More than 80%.When there is singlephase earth fault, owing to can not constitute low-impedance short-circuit loop, earth current is the least, therefore is referred to as
Small current neutral grounding system.In most cases can blow-out recovery be exhausted automatically when its advantage is to occur singlephase earth fault
Edge.After circuit occurs permanent Single Phase Metal earth fault, the line voltage of three-phase system remains symmetrical, size and phase place
Do not change, but the Earth Phase direct-to-ground capacitance of system is shorted, voltage-to-ground all vanishing.For preventing another from drawing ground connection
Play line to line fault even three-phase circuit, thus get rid of single-phase fault in certain time must be limited.
For a long time, single-phase grounded malfunction in grounded system of low current problem is carried out by the experts and scholars of domestic and international power domain
Substantial amounts of research.When there is singlephase earth fault, the Cleaning Principle in the past used is based on the stable state produced during fault mostly
Signal.But owing to steady-state signal is fainter, affected greatly by extraneous factor and the method for operation, caused at actual engineer applied
In be difficult to extract fault-signal effectively.And, distribution network fault is complicated and changeable, such as system neutral compensativity, each outlet
Length, position of failure point, transition resistance size, the development etc. of short dot electric arc, the combination of these conditions so that in a kind of fault
In the case of work good device, may lose efficacy in another case.Therefore, single-phase earthing of small current earthing system protection is seen
Like the most simple but facts have proved it is extremely complex, this is also the master that some countries do not use neutral non-effective grounding mode
Want one of reason.But small current neutral grounding system has an advantageous superiority after all, and in China and other country by extensively
Application, accurately finding faulty line accurately becomes the task of top priority.
The most domestic judgement for single-phase grounded malfunction in grounded system of low current mainly has a following several method:
1., for the distribution line that cable is master, use cable termination to install ZCT additional and gather zero-sequence current, according to
The zero-sequence current amplitude produced during earth fault is as basis for estimation；
2. for overhead transmission line, general employing installs line-failure indicator additional, and by line-failure indicator, whether board turning comes
The interval that failure judgement occurs；
3. use manual detection method, after there is single-phase earthing, circuit is split as several sections, use binary search fault
Point；
4. zero sequence Steady State Analysis: include that quintuple harmonics is sent out, zero sequence real component is sent out, first half-wave method, wavelet method etc..
But prior art inevitably has following defects that
Cable termination installs ZCT additional and judges whether that the method that single-phase earthing occurs is phase according to zero-sequence current amplitude
To comparing effective ways, but neutral point is used to the small current system of arc suppression coil compensation, but helpless.Code regulation line
Road capacitance current is considered as transformer neutral point should use arc suppression coil compensation mode ground connection more than 10A's, necessary more than 100A
Use arc suppression coil compensation mode ground connection.A cable inherently big capacitance body, the therefore commonly used arc blowout wire of neutral point
Circle compensates；After singlephase earth fault occurs, the earth current of fault phase is compensated rapidly by arc suppression coil, instead be non-event
The capacity current of barrier phase is more than faulted phase current, and the mode of earth fault exists serious lacking therefore to use zero-sequence current amplitude to judge
Fall into.
Circuit installs fault detector additional, and by fault detector, whether board turning comes failure judgement interval is that current distribution is maked somebody a mere figurehead
Circuit judges the unique method of earth fault.Owing to line-failure indicator can only gather monophase current, and itself is due to energy consumption
Limiting and cost factor can not use large-scale electronic circuit, current most domestic line-failure indicator can only be according to connecing
The voltage (can not directly obtain, converted by monitoring electric field intensity) of ground moment and the logic such as current amplitude, phase angle
Calculate and judge phase fault.Ye You producer uses signal injection method to judge single-phase earthing, but by earth resistance, extinguishing arc
Coil Compensations etc. limit, and signal injection method effect is the most undesirable.
Artificial judgment earth fault is the most real effective method.But take time and effort, have a strong impact on power supply reliability.By
Large-scale customer complaint is caused in the long meeting of power off time.Electric power enterprise personnel are fewer and feweri particularly now, it is difficult to have foot
Enough manpower, time ensure.
Zero-sequence current Steady State Analysis (send out containing quintuple harmonics, send out, first half-wave method, wavelet method etc. tens by zero sequence real component
Plant algorithm) highly effective for the distribution line of isolated neutral, faulty line and fault section can be judged rapidly, but
By the distribution line of arc suppression coil compensation ground connection, effect is not had the most substantially for neutral point.
Line-failure indicator cannot judge that earth fault is owing to line-failure indicator can only gather monophase current, and
Reduced voltage is carried out, it is impossible to the information such as accurate acquisition voltage so that the quintuple harmonics that tradition uses is sent out, head by gathering electric field intensity
The determination methods such as half-wave method, wavelet method all cannot use.It is interval that part producer uses signal injection method to carry out failure judgement, this side
Method can only be effective to part metals earth fault.All not having what effect for big resistance, high resistance ground, its reason is ground connection electricity
Resistance makes the faintest injection intensity significantly decay, and causes fault detector cannot collect Injection Signal.
The neutral point distribution line by arc suppression coil compensation ground connection, occurs earth fault moment arc suppression coil to carry out rapidly
Reparation, after two or three cycles, the earth current of faulty line is compensated rapidly, causes earth current to be less than 5A so that above-mentioned analysis
Method is the most invalid.
Utility model content
The purpose of this utility model is to design based on zero sequence transient analysis low current neutral grounding system fault alignment system,
Build a kind of hardware structure, utilize Clock Synchronization Technology, micro power consumption wireless mechanics of communication, zero sequence transient analysis technology for realization
Complete the zero-sequence current synthesis of each branch node of distribution networking, the admission of zero sequence transient-wave, and deliver to back-stage management platform and enter
The analysis of row trouble point and judgement.
This utility model is achieved through the following technical solutions: position based on zero sequence transient analysis low current neutral grounding system fault
System, including twin coil line-failure indicator, data concentrator and back-stage management platform, described twin coil line fault indicates
Device is connected with data concentrator by communication link, and described data concentrator is connected with back-stage management platform by communication network
Connect；It is provided with network link device systems, FTP client FTP, database server and application service in described back-stage management platform
Device, the system of described client is connected with database server and application server by network link device systems, described number
Being connected with application server by network link device systems according to storehouse server, described network link device systems is by communication
Network is connected with data concentrator.
Further for preferably realizing this utility model, it is possible to the data will collected in data concentrator safely and fast
Information is transmitted to back-stage management platform, uses the following structure that arranges especially: be provided with anti-in described network link device systems
Wall with flues, described data concentrator is connected with fire wall by communication network, described fire wall by netting twine respectively with client
System, database server and application server are connected.
Further for preferably realizing this utility model, use the following structure that arranges especially: each at three-phase line
Described twin coil line-failure indicator, and the twin coil circuit on the three-phase line at same monitoring point all it is provided with in phase line
The clock of fault detector synchronizes.
Further for preferably realizing this utility model, it is possible to short distance and safety and stability carry out twin coil circuit therefore
Barrier indicator and the data communication of data concentrator, the especially following set-up mode of employing: described twin coil line-failure indicator
It is connected with data concentrator by ZigBee communication link.
Further for preferably realizing this utility model, use the following structure that arranges especially: in described data concentrator
It is provided with flush bonding processor, GPRS module, GPS module, memory circuitry and gathers ZigBee module, described embedded processing
Device is connected with GPRS module, memory circuitry, GPS module and collection ZigBee module respectively, described collection ZigBee module
It is connected with twin coil line-failure indicator by ZigBee communication link, described flush bonding processor is also associated with electricity
Pressure sampling front-end processes circuit, and the input of described voltage sample front-end processing circuit is connected with phase line.
Further for preferably realizing this utility model, use the following structure that arranges especially: in described data concentrator
Be additionally provided with peripheral circuit, be provided with in described peripheral circuit be connected with flush bonding processor respectively communication interface circuit,
JTAG downloads mouth, display lamp, key-press module, watchdog circuit and debugging interface.
Further for preferably realizing this utility model, the following set-up mode of employing especially: described twin coil circuit event
Barrier indicator uses the record wave mode line-failure indicator of the also band remote signaling function with record wave energy.
This utility model compared with prior art, has the following advantages and beneficial effect:
(1) this utility model builds a kind of hardware structure, utilizes Clock Synchronization Technology, micro power consumption wireless communication for realization
Technology, zero sequence transient analysis technology complete the zero-sequence current synthesis of each branch node of distribution networking, the admission of zero sequence transient-wave,
And deliver to back-stage management platform and carry out analysis and the judgement of trouble point.
(2) this utility model is greatly decreased the singlephase earth fault investigation time, improves operation of power networks level；By three distant merits
Can (three distant include remote measurement: gather the data such as line current, remote signalling: fault state data, remote control: control malfunction indicator lamp and dodge
Bright), not only also can rapid deduction can be out of order interval with the on-the-spot telemetry of quick obtaining, and by note, cell phone customer
The means very first time notice user malfunction generation points such as end application program.
(3) this utility model can effectively judge that neutral point passes through the distribution network systems generation single-phase earthing of arc suppression coil compensation
There is interval in rear fault；And the zero-sequence current transient-wave of distribution line key node can be obtained, push away for back-stage management platform
Performance fault generation point.
(4) this utility model structure that zero sequence transient analysis method is used relatively at present, construction cost is greatly reduced, profit
With the twin coil line-failure indicator of low cost, data concentrator two sampling device possessing gps clock synchronizing function can be real
The zero-sequence current transient-wave of existing grid nodes gathers.
(5) this utility model effectively solves the difficult problem that overhead transmission line zero sequence circuit gathers, by clock real-time synchronization technique
Guarantee that the twin coil line-failure indicator on three-phase conducting wire gathers current value simultaneously, and gather gps clock data, pass through data
The flush bonding processor of concentrator can calculate circuit zero sequence current value.
Accompanying drawing explanation
Fig. 1 is this utility model logical architecture figure.
Fig. 2 is the structural representation of data concentrator described in the utility model.
Detailed description of the invention
Below in conjunction with embodiment, this utility model is described in further detail, but embodiment of the present utility model is not
It is limited to this.
Embodiment 1:
The utility model proposes based on zero sequence transient analysis low current neutral grounding system fault alignment system, as shown in Figure 1, Figure 2
Shown in, including twin coil line-failure indicator, data concentrator and back-stage management platform, described twin coil line fault indicates
Device is connected with data concentrator by communication link, and described data concentrator is connected with back-stage management platform by communication network
Connect；It is provided with network link device systems, FTP client FTP, database server and application service in described back-stage management platform
Device, the system of described client is connected with database server and application server by network link device systems, described number
Being connected with application server by network link device systems according to storehouse server, described network link device systems is by communication
Network is connected with data concentrator.
Described twin coil line-failure indicator, is arranged on three-phase line trunk segmentation and the Main Branches node of distribution
On, and the clock synchronization of three twin coil line-failure indicators of everywhere, mainly complete the sampling functions of electric current and lead to
Cross ZigBee communication technology and the waveform of admission is sent to data concentrator；
Described data concentrator, is mainly used in obtaining the waveform number that the twin coil line-failure indicator of three-phase line is recorded
According to, the clock data of three twin coil line-failure indicators of real-time synchronization simultaneously；Data concentrator passes through telecom operators' base
Stand, communication network constructed by mobile operator machine room combines network link device systems and carries out data with back-stage management platform and lead to
Letter；
Described back-stage management platform, is mainly used in the breakdown judge periodically obtaining multiple data concentrator according to value, foundation
Apparatus logic relation deduces contingent fault section, if will by the means of note propelling movement, information alert after breaking down
Fault message pushes to user terminal in time；
Described application server is for carrying out the loading of application program.
Described database server is for receiving the storage of data.
Embodiment 2:
The present embodiment is to optimize further on the basis of above-described embodiment, further new for preferably realizing this practicality
Type, it is possible to safely and fast by the data information transfer collected in data concentrator to back-stage management platform, institute as shown in Figure 1, Figure 2
Show, use the following structure that arranges especially: being provided with fire wall in described network link device systems, described data concentrator passes through
Communication network is connected with fire wall, described fire wall by netting twine respectively with FTP client FTP, database server and application
Server is connected.The data collected in data concentrator will be by constructed by telecom operators base station, mobile operator machine room
Communication network be linked in fire wall, utilize fire wall by the virus in data message, attack the isolation such as data, then need to
The data information transfer wanted is in application server and data server, after analyzing and processing, when there is singlephase earth fault,
Back-stage management platform occurs the moment to call the fault waveform data of 3 complete cycles of survey together to all of data concentrator according to fault,
Similarity and direction according to zero sequence circuit transient-wave, it is judged that fault occurs interval, and pushes fault message and fault in time
The interval occurred is in the system of client.
Embodiment 3:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, as shown in Figure 1 and Figure 2, the following structure that arranges is used especially: be all provided with described in each phase line of three-phase line
The clock of the twin coil line-failure indicator on the three-phase line at twin coil line-failure indicator, and same monitoring point is same
Step, three phase lines at each monitoring point are all provided with a twin coil line-failure indicator, by two-wire astragal
Line fault indicator can easily obtain transient zero-sequence current waveform and the relevant parameter of distribution network line.
Embodiment 4:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, it is possible to short distance and the data communication carrying out twin coil line-failure indicator and data concentrator of safety and stability,
As shown in Figure 1 and Figure 2, following set-up mode is used especially: described twin coil line-failure indicator passes through ZigBee communication link
It is connected with data concentrator.
Embodiment 5:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, as shown in Figure 1 and Figure 2, use especially the following structure that arranges: be provided with in described data concentrator flush bonding processor,
GPRS module, GPS module, memory circuitry and gather ZigBee module, described flush bonding processor respectively with GPRS module, deposit
Memory circuit, GPS module and gather ZigBee module be connected, described collection ZigBee module by ZigBee communication link with
Twin coil line-failure indicator is connected, and is also associated with voltage sample front-end processing circuit on described flush bonding processor,
The input of described voltage sample front-end processing circuit is connected with phase line.
Described data concentrator, receives the clock signal that GPS module provides；By gathering Zigbee module and two-wire astragal
Line fault indicator carries out communication, and clock signal is sent to twin coil line-failure indicator；By gathering Zigbee module
Receive current value and collection moment that twin coil line-failure indicator gathers；Utilize flush bonding processor (dsp chip), in conjunction with
Vector method calculates zero-sequence current waveform, and is stored in the machine；And fault can be carried out sentence according to the setting value of back-stage management platform
Disconnected, if to be short-circuited, the breakdown judge such as ground connection, if breaking down, actively transmit data to back-stage management platform；Pass through GPRS
Module and back-stage management platform carry out communication, if survey data called together by back-stage management platform, the data after gathering data and calculating are same
Step is sent to back-stage management platform, carries out advanced analysis and application.
Embodiment 6:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, use the following structure that arranges especially: be additionally provided with peripheral circuit in described data concentrator, set in described peripheral circuit
Be equipped with the communication interface circuit that is connected respectively with flush bonding processor, JTAG downloads mouth, display lamp, key-press module, house dog
Circuit and debugging interface.
Embodiment 7:
The present embodiment is to optimize further on the basis of any of the above-described embodiment, further for preferably realizing this reality
With novel, as shown in Figure 1 and Figure 2, following set-up mode is used especially: described twin coil line-failure indicator uses has record
The record wave mode line-failure indicator of the also band remote signaling function of wave energy.
Described data concentrator obtains the Wave data that the twin coil line-failure indicator of three-phase line is recorded, the most real
Time synchronize three twin coil line-failure indicator clock datas；Described data concentrator is real by concentrator wireless communication module
Time complete the clock check function with three twin coil line-failure indicators, and twin coil line-failure indicator is recorded
Wave data be collected；
After described data concentrator calls the three-phase current data measuring twin coil line-failure indicator together, carry out zero sequence in time
Transient-wave synthesizes, and calculates zero-sequence current direction and zero sequence waveform duty cycle, then represents zero-sequence current direction and zero sequence ripple
The data of shape dutycycle will be entered in back-stage management platform in company with zero-sequence current transient-wave synchronous driving to back-stage management platform
Row is analyzed, is calculated；
Described data concentrator can timing (user defines acquisition time interval on concentrator, gives tacit consent to 5 minutes) and three
Twin coil line-failure indicator communication on phase line, and synchronize all devices (the twin coil line fault on three-phase line
Indicator and the clock of concentrator) clock data；
Described data concentrator timing (user defines acquisition time interval on concentrator, gives tacit consent to 5 minutes) obtains two-wire
The telemetry of astragal line fault indicator；
Twin coil line-failure indicator can also be managed by described data concentrator；
When faults such as the three-phase line of power distribution network are short-circuited, data concentrator can obtain fault data in real time；
Described data concentrator obtain back-stage management platform call together survey order, transmit in time telemetry (three-phase electricity flow valuve and
Clock) and (data concentrator calculates zero-sequence current transient-wave, amplitude, dutycycle, similarity, phase angle, zero sequence electricity to calculate data
The parameters such as stream stable state amplitude)；
When data concentrator calls survey data together, the data of preservation are sent to by twin coil line-failure indicator according to order
Data concentrator, when carrying out data transmission, reduces energy consumption while efficiency of transmission for improving, and completes after multiple cycle data again
Unified compression, packing data are sent to data concentrator.
For small current neutral grounding system, in prior art, the most also there is the zero-sequence current transient analysis method that uses, main
Apply in transformer station in line-selected earthing device, owing to needing to synchronize the clock signal of each information collection node, so cloth
Putting substantial amounts of gps clock sync server and it needs to install substantial amounts of sensor, the highest being unfavorable for pushes away system cost on a large scale
Extensively；And system of the present invention, utilize the twin coil line-failure indicator of low cost, possess the number of gps clock synchronizing function
The zero-sequence current transient-wave collection of grid nodes can be realized according to concentrator two sampling device.
Zero-sequence current is the value obtained after three-phase current vector adds up.Prior art typically use three-phase conducting wire unification through
Then ZCT or individually collection three-phase current draw zero-sequence current by algorithm vector is cumulative；Cable is by three-phase conducting wire
Constitute, it is possible to pass through ZCT easily.But overhead transmission line phase spacing is more than 25cm, it is impossible to use zero-sequence mutual inductance
The mode of device gathers zero-sequence current, and the most current line-failure indicator can gather three-phase current, but is not carried out clock
Simultaneous techniques, the current value collected does not has vector logical relation, cannot obtain zero-sequence current yet.
This utility model can guarantee the twin coil line-failure indicator on three-phase conducting wire by clock real-time synchronization technique
Gather current value simultaneously, and gather gps clock data, circuit zero sequence can be calculated by the dsp processor of data concentrator
Current value.
The above, be only preferred embodiment of the present utility model, and this utility model not does any pro forma limit
System, every according to technical spirit of the present utility model, above example is made any simple modification, equivalent variations, each fall within
Within protection domain of the present utility model.
Claims (7)
1. based on zero sequence transient analysis low current neutral grounding system fault alignment system, it is characterised in that: include the event of twin coil circuit
Barrier indicator, data concentrator and back-stage management platform, described twin coil line-failure indicator passes through communication link and data
Concentrator is connected, and described data concentrator is connected with back-stage management platform by communication network；Described back-stage management platform
Inside being provided with network link device systems, FTP client FTP, database server and application server, the system of described client is led to
Crossing network link device systems to be connected with database server and application server, described database server passes through lattice chain
Pipeline equipment system is connected with application server, and described network link device systems is connected with data concentrator by communication network
Connect.
The most according to claim 1 based on zero sequence transient analysis low current neutral grounding system fault alignment system, its feature exists
In: being provided with fire wall in described network link device systems, described data concentrator is connected with fire wall by communication network
Connecing, described fire wall is connected with FTP client FTP, database server and application server respectively by netting twine.
The most according to claim 1 and 2 based on zero sequence transient analysis low current neutral grounding system fault alignment system, its feature
It is: in each phase line of three-phase line, be all provided with described twin coil line-failure indicator, and at same monitoring point
The clock of the twin coil line-failure indicator on three-phase line synchronizes.
The most according to claim 1 and 2 based on zero sequence transient analysis low current neutral grounding system fault alignment system, its feature
It is: described twin coil line-failure indicator is connected with data concentrator by ZigBee communication link.
The most according to claim 4 based on zero sequence transient analysis low current neutral grounding system fault alignment system, its feature exists
In: it is provided with flush bonding processor, GPRS module, GPS module, memory circuitry in described data concentrator and gathers ZigBee
Module, described flush bonding processor is connected with GPRS module, memory circuitry, GPS module and collection ZigBee module respectively,
Described collection ZigBee module is connected with twin coil line-failure indicator by ZigBee communication link, described embedded
Voltage sample front-end processing circuit, the input of described voltage sample front-end processing circuit and phase line phase it is also associated with on processor
Connect.
The most according to claim 5 based on zero sequence transient analysis low current neutral grounding system fault alignment system, its feature exists
In: be additionally provided with peripheral circuit in described data concentrator, be provided with in described peripheral circuit respectively with flush bonding processor phase
The communication interface circuit, the JTAG that connect download mouth, display lamp, key-press module, watchdog circuit and debugging interface.
7. according to described in claim 1 or 2 or 5 or 6 based on zero sequence transient analysis low current neutral grounding system fault alignment system,
It is characterized in that: described twin coil line-failure indicator uses the record wave mode circuit of the also band remote signaling function with record wave energy
Fault detector.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106713286A (en) * | 2016-12-07 | 2017-05-24 | 广东电网有限责任公司电力科学研究院 | Electric power data transmission system based on multilevel authentication and suspected attack isolation |
| CN107390089A (en) * | 2017-07-19 | 2017-11-24 | 国网福建省电力有限公司 | Transient zero-sequence current signal synchronizing method and device are realized in distributed system |
| CN108761282A (en) * | 2018-04-18 | 2018-11-06 | 国网江苏省电力有限公司电力科学研究院 | A kind of ultrasonic wave shelf depreciation auto-check system and its method based on robot |
| CN109001593A (en) * | 2018-07-16 | 2018-12-14 | 北京映翰通网络技术股份有限公司 | A kind of distribution network failure recording control method |
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2016
- 2016-04-28 CN CN201620375253.1U patent/CN205670180U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106713286A (en) * | 2016-12-07 | 2017-05-24 | 广东电网有限责任公司电力科学研究院 | Electric power data transmission system based on multilevel authentication and suspected attack isolation |
| CN107390089A (en) * | 2017-07-19 | 2017-11-24 | 国网福建省电力有限公司 | Transient zero-sequence current signal synchronizing method and device are realized in distributed system |
| CN108761282A (en) * | 2018-04-18 | 2018-11-06 | 国网江苏省电力有限公司电力科学研究院 | A kind of ultrasonic wave shelf depreciation auto-check system and its method based on robot |
| CN108761282B (en) * | 2018-04-18 | 2024-01-05 | 国网江苏省电力有限公司电力科学研究院 | Ultrasonic partial discharge automatic diagnosis system and method based on robot |
| CN109001593A (en) * | 2018-07-16 | 2018-12-14 | 北京映翰通网络技术股份有限公司 | A kind of distribution network failure recording control method |
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