CN203772931U - Online power distribution network fault wave recording device based on wireless three-phase synchronous technology - Google Patents
Online power distribution network fault wave recording device based on wireless three-phase synchronous technology Download PDFInfo
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- CN203772931U CN203772931U CN201420007026.4U CN201420007026U CN203772931U CN 203772931 U CN203772931 U CN 203772931U CN 201420007026 U CN201420007026 U CN 201420007026U CN 203772931 U CN203772931 U CN 203772931U
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The utility model discloses an online power distribution network fault wave recording device based on wireless three-phase synchronous technology, which comprises a signal acquisition module, a signal conditioning module, a micro controller, a wireless communication module, a memory and a power supply module, wherein the power supply module is connected with the power supply end of the micro controller; the signal acquisition module acquires transient current and voltage of a three-phase conductive cable in the power distribution network, the transient current and voltage are converted to current and voltage standard level signals applied to the micro controller through the signal conditioning module, the current and voltage standard level signals are then inputted to the micro controller, the micro controller acquires the real-time receiving time of the current and voltage standard level signals from the remote terminal through the wireless communication module, the current and voltage standard level signals received continuously form current waveform and voltage waveform data synchronous with the three-phase conductive cable in the real-time receiving time sequence, the data are stored in the memory and can serve as fault detection basis, and accuracy of fault detection is facilitated.
Description
Technical field
The utility model relates to the online fault wave recording device of a kind of power distribution network based on wireless three-phase synchronous technology.
Background technology
The rise of intelligent grid technology, the information processing technology, wire/wireless communication technology, advanced Electronic transducer technology etc. are combined together, the popularization of the distribution network automated equipment such as new digital type fault detector and FTU/DTU partial rcsponse distribution network failure have a power failure economy and the social pressures brought.But, if do not set up in advance one more basic, comprise the complete primary fault waveform database for distribution line working line electric current, voltage/electric field information, in the situation that the data that various fault diagnosises and localization method still can only rely on electromagnetism software emulation to obtain design, still difficulty is very large to improve the accuracy of fault diagnosis.For sooner, more accurately distribution line failure is positioned, preferably there is a large amount of actual track faults that fault current and false voltage/electric field data that the moment directly gathers on distribution line occur, although the distribution network automated equipment such as FTU/DTU is also constantly applying in process, but it is not applied to scene by failure wave-recording function, this is very large loss to carrying out the research work of Fault Diagnosis of Distribution Network and aspect, location.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of power distribution network based on wireless three-phase synchronous technology online fault wave recording device, and can be in real time for distribution network failure detects synchronous current waveform and voltage waveform data that three-phase conductor cable is provided.
Solve the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:
The online fault wave recording device of power distribution network based on wireless three-phase synchronous technology, is characterized in that: described wave recording device comprises signal acquisition module, signal condition module, microcontroller, wireless communication module, storer and supply module, described supply module is connected to the feeder ear of microcontroller, described signal acquisition module gathers the transient current of three-phase conductor cable in power distribution network, voltage, and become to be suitable for the electric current of described microcontroller by described signal condition module converts, after voltage standard level signal, be input to described microcontroller, described microcontroller obtains described electric current by described wireless communication module from remote terminal, the real-time time of reception of voltage standard level signal, and by the electric current receiving continuously, synchronous current waveform and voltage waveform data that voltage standard level signal forms three-phase conductor cable by the order of real-time time of reception are saved in described storer.
As a kind of embodiment of the present utility model, described signal acquisition module comprises current transformer for gathering transient current and for gathering the electric field detecting sensor of transient voltage, described current transformer and electric field detecting sensor are arranged on respectively in three-phase conductor cable, and are connected to the respective input mouth of signal condition module.
As a kind of improvement of the present utility model, described supply module comprises power controller; Power controller obtains described current transformer energy conversion from three-phase conductor cable becomes suitable electric power to power to described microcontroller.
As a kind of improvement of the present utility model, described supply module also comprises reserve battery and the power supervisor for cut-in stand-by battery and the power supply of described power controller, and described power controller and reserve battery are connected to the feeder ear of microcontroller by this power supervisor.
As a kind of improvement of the present utility model, described microcontroller is provided with current threshold and threshold voltage, microcontroller only, in the time that the electric current receiving, voltage standard level signal exceed respectively described current threshold and threshold voltage, automatically starts described wireless communication module and current waveform now and voltage waveform data is saved in described storer.
As a kind of improvement of the present utility model, described wireless communication module is based on radio communication mode and time-division multiplex communication agreement and described remote terminal two-way communication transmission, when described microcontroller receives by wireless communication module the forced-triggered instruction that described remote terminal sends, wireless communication module current waveform now and voltage waveform data are saved in described storer described in controlled starting.
As a kind of improvement of the present utility model, described microcontroller is provided with the communication port for connecting failure detector, and failure detector reads current waveform and the voltage waveform data of in described storer, preserving by microcontroller.
Compared with prior art, the utlity model has following beneficial effect:
First, the utility model is by signal acquisition module, signal condition module, microcontroller and wireless communication module, the current waveform of three-phase conductor cable in the power distribution network in a period of time and voltage waveform data can be saved in described storer, as the foundation of fault detect, make failure detector no longer need to depend on a small amount of numerical informations such as current effective value, current amplitude or electric field magnitude and carry out fault detect, contribute to improve the accuracy of fault detect;
Second, the utility model has been realized the wireless synchronization function of the collection signal between the three-phase of three-phase conductor cable by wireless communication module, it has high synchronization accuracy, timing tracking accuracy between three-phase can reach 33ms, make the phase angle error between three-phase be less than 0.6 degree, reduce by the three superimposed errors of obtaining zero-sequence current, ensured the precision of pole line measurement zero-sequence current;
The 3rd, wireless communication module of the present utility model adopts time division multiplexing wireless communication agreement, only opens radio communication in the moment that need to carry out communication, and in all the other moment radio communications in closed condition, greatly reduce system power dissipation;
The 4th, microcontroller of the present utility model obtains power supply by power supervisor and power controller from three-phase conductor cable, avoids Short-Circuit High Current to cause the damage of power supply by power control restriction power taking power simultaneously; And, in the time that the automatic electricity getting mode of power controller can not obtain enough electric power, automatically switch into reserve battery by power supervisor, guarantee the functional reliability of wave recording device.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is the system architecture diagram of the online fault wave recording device of power distribution network of the present utility model.
Embodiment
As shown in Figure 1, the online fault wave recording device of the power distribution network based on wireless three-phase synchronous technology of the present utility model, comprises signal acquisition module, signal condition module, microcontroller, wireless communication module, storer and supply module.
Signal acquisition module of the present utility model comprises the current transformer of the transient current for gathering power distribution network three-phase conductor cable and for gathering the electric field detecting sensor of transient voltage of power distribution network three-phase conductor cable, current transformer and electric field detecting sensor are arranged on respectively in three-phase conductor cable, and are connected to the respective input mouth of signal condition module.Signal condition module receives the transient current that signal acquisition module collects, voltage signal, it converts this elementary transient current signal to the current standard level signal that can meet microcontroller input requirements, the weak voltage signals process that transient voltage signal is obtained after sampling resistor is amplified, cushion by voltage follower again, isolation and raising load capacity, disturb finally by crossing second-order low-pass filter filtering noise, thereby convert the voltage standard level signal that meets microcontroller input requirements to, wireless communication module is based on radio communication mode and time-division multiplex communication agreement and remote terminal two-way communication transmission, the electric current of microcontroller receiving signal reason module output, voltage standard level signal, obtain electric current by this wireless communication module from remote terminal, the real-time time of reception of voltage standard level signal, and by the electric current receiving continuously, synchronous current waveform and voltage waveform data that voltage standard level signal forms three-phase conductor cable by the order of real-time time of reception are saved in storer.In addition, microcontroller adopts radio communication mode to carry out bidirectional transfer of information by wireless communication module and remote terminal, both the various status informations, numerical information, the shape information that obtain can be sent, also can accept external command, there is remote signalling and telemetry function.
Above-mentioned transient current signal amplitude is low, frequency is high, for can be continuing in the line current of hundreds of ampere, obtain the duration and be only 10～20ms, the amplitude high-frequency transient fault electric current lower than 1A, intelligent distribution network monitor has adopted electronic current mutual inductor, and this mutual inductor has the following advantages:
High sensitivity: transient fault current amplitude is greater than 1 ampere and can detects.
High bandwidth: can measure 1000 hertz with interior transient fault electric current.
High consistance: electronic current mutual inductor adopts Computer-aided Design Technology and number processing technology, production run total digitalization, full-automation, technological parameter good stability, when production in enormous quantities, various process parameters consistance can be controlled in 1%, and superimposed to obtain zero-sequence current most important for three for this point.
High noise immunity: pole line electronic current mutual inductor working environment very severe, be in serious electromagnetic interference environment, this just requires electronic current mutual inductor must possess very strong interference free performance.
The utility model can adopt various faults record wave mode to trigger record ripple, concrete: microcontroller is preset with current threshold and threshold voltage, microcontroller only, in the time that the electric current receiving, voltage standard level signal exceed respectively current threshold and threshold voltage, automatically starts wireless communication module and current waveform now and voltage waveform data is saved in storer; By the value of current threshold and threshold voltage is rationally set, just can make to undergo mutation at the current waveform detecting or current effective value, and when Sudden Changing Rate exceedes the current threshold of setting, microcontroller can trigger record ripple, records the current waveform and the electric field waveform signal that trigger moment front and back; Or, undergo mutation at the voltage waveform detecting or voltage magnitude, and Sudden Changing Rate being while exceeding setting threshold, microcontroller can trigger record ripple, records the current waveform and the electric field waveform signal that trigger before and after the moment.In addition, when microcontroller receives by wireless communication module the forced-triggered instruction that remote terminal sends, also can trigger at once record ripple, controlled starting wireless communication module is also saved in the current waveform and the voltage waveform data that trigger before and after the moment in storer.
Supply module of the present utility model comprises power controller, reserve battery and the power supervisor for cut-in stand-by battery and power controller power supply, and power controller and reserve battery are connected to the feeder ear of microcontroller by power supervisor; The energy conversion obtaining power controller produces current transformer magnetic field from three-phase conductor cable line power becomes suitable electric power to power to microcontroller in automatic electricity getting mode.The ability of obtaining energy due to current transformer from the magnetic field of three-phase conductor cable line current generation is strong, efficiency is high, and volume is little, therefore, line current hour, maximize power taking power by power controller, get peak power, only need 6～10A line current, just can support the online wave recording device global function of power distribution network normally to work, and line current is when large, limit power taking power by power controller, make current transformer unsaturated, reduce output voltage, improve power taking condition, still can get the sufficient energy, when Short-Circuit High Current, can stop rapidly power taking by power controller, avoid current transformer to damage under huge current flow is impacted, in the time that current transformer power taking power is enough, make Current Transformer as power supply, in the time that current transformer power taking power is inadequate, use reserve battery as power supply, reserve battery normal working voltage 3.6V, capacity reaches 8Ah, can the online wave recording device work of distribution network three months.
Microcontroller of the present utility model is also provided with the communication port for connecting failure detector, and failure detector is by current waveform and the voltage waveform data of preserving in microcontroller read memory.Due to above-mentioned current waveform and electric field waveform, precision is high, good stability, sampling rate is very high, retain abundant frequency component, for particularly Earth Fault Detection of fault detect, abundant and high-quality information are provided, the information adopting in fault detect, no matter in the amount of being or matter, all ultra-traditional fault detectors far away, detect in the anti-power transmission of motor, owing to there being the high-quality current waveform signal of high sampling rate, can accurately tell the attenuation process of electric current in the anti-transmission process of motor, the electric current that this process is different from power failure process is decayed suddenly, can solve the problem that the anti-power transmission of traditional fault detector motor causes short-circuit detecting erroneous judgement, in the problem of joint using, owing to thering is the high-quality current waveform signal of high sampling rate, there is higher electric current resolution, can accurately tell power-off condition and little current conditions, there is the electric field waveform signal of high stability simultaneously, can accurately tell because voltage falls the electric field signal causing and change, in Earth Fault Detection, advantage is more outstanding, according to the high-quality current waveform signal of high sampling rate and electric field waveform signal, can detect very delicately the transient current producing due to earth fault changes, and because falling, voltage cause electric field signal to change, can filter out the earth fault that transient fault electric current is greater than 1A.
The utility model does not limit to and above-mentioned embodiment; according to foregoing; according to ordinary skill knowledge and the customary means of this area; do not departing under the above-mentioned basic fundamental thought of the utility model prerequisite; the utility model can also be made equivalent modifications, replacement or the change of other various ways, all drops among protection domain of the present utility model.
Claims (7)
1. the online fault wave recording device of the power distribution network based on wireless three-phase synchronous technology, is characterized in that: described wave recording device comprises signal acquisition module, signal condition module, microcontroller (MCU), wireless communication module, storer and supply module, described supply module is connected to the feeder ear of microcontroller, described signal acquisition module gathers the transient current of three-phase conductor cable in power distribution network, voltage, and become to be suitable for the electric current of described microcontroller by described signal condition module converts, after voltage standard level signal, be input to described microcontroller, described microcontroller obtains described electric current by described wireless communication module from remote terminal, the real-time time of reception of voltage standard level signal, and by the electric current receiving continuously, synchronous current waveform and voltage waveform data that voltage standard level signal forms three-phase conductor cable by the order of real-time time of reception are saved in described storer.
2. wave recording device according to claim 1, it is characterized in that: described signal acquisition module comprises current transformer for gathering transient current and for gathering the electric field detecting sensor of transient voltage, described current transformer and electric field detecting sensor are arranged on respectively in three-phase conductor cable, and are connected to the respective input mouth of signal condition module.
3. wave recording device according to claim 2, is characterized in that: described supply module comprises power controller; Power controller obtains described current transformer energy conversion from three-phase conductor cable becomes suitable electric power to power to described microcontroller.
4. wave recording device according to claim 3, it is characterized in that: described supply module also comprises reserve battery and the power supervisor for cut-in stand-by battery and the power supply of described power controller, and described power controller and reserve battery are connected to the feeder ear of microcontroller by this power supervisor.
5. according to the wave recording device described in claim 1 to 4 any one, it is characterized in that: described microcontroller is provided with current threshold and threshold voltage, microcontroller only, in the time that the electric current receiving, voltage standard level signal exceed respectively described current threshold and threshold voltage, automatically starts described wireless communication module and current waveform now and voltage waveform data is saved in described storer.
6. wave recording device according to claim 5, it is characterized in that: described wireless communication module is based on radio communication mode and time-division multiplex communication agreement and described remote terminal two-way communication transmission, when described microcontroller receives by wireless communication module the forced-triggered instruction that described remote terminal sends, wireless communication module current waveform now and voltage waveform data are saved in described storer described in controlled starting.
7. according to the wave recording device described in claim 1 to 4 any one, it is characterized in that: described microcontroller is provided with the communication port for connecting failure detector, failure detector reads current waveform and the voltage waveform data of in described storer, preserving by microcontroller.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391227A (en) * | 2014-11-28 | 2015-03-04 | 国家电网公司 | Distribution line online monitoring collection terminal supporting fault recording |
| CN104698337A (en) * | 2015-02-13 | 2015-06-10 | 威胜电气有限公司 | Online recording method of fault indicators |
| CN104793108A (en) * | 2015-05-08 | 2015-07-22 | 国网上海市电力公司 | Discrete low-voltage failure cable identification device |
| CN104808115A (en) * | 2015-05-08 | 2015-07-29 | 国网上海市电力公司 | Split acquisition terminal for recognition of low-voltage faulted cables |
| CN105807126A (en) * | 2016-04-28 | 2016-07-27 | 四川瑞霆电力科技有限公司 | Overhead distribution line zero-sequence current acquisition terminal and method based on clock synchronization |
| CN107966603A (en) * | 2017-09-08 | 2018-04-27 | 国电南瑞科技股份有限公司 | A kind of electric system multi-frequency oscillation real time panoramic monitors method |
| CN108020707A (en) * | 2018-02-05 | 2018-05-11 | 新风光电子科技股份有限公司 | A kind of failure wave-recording control system for SVG |
| CN110441657A (en) * | 2019-08-22 | 2019-11-12 | 深圳华工能源技术有限公司 | Distribution system failure wave-recording method, apparatus and storage medium |
| CN110488159A (en) * | 2019-09-19 | 2019-11-22 | 广东电网有限责任公司 | A kind of application method of distribution O&M monitoring device |
| CN110794195A (en) * | 2019-11-18 | 2020-02-14 | 北京煜邦电力技术股份有限公司 | Three-phase synchronous sampling method and device and storage medium |
| CN111579926A (en) * | 2020-05-22 | 2020-08-25 | 东北电力大学 | Distributed power fault positioning method for power distribution network |
| CN112487745A (en) * | 2020-11-18 | 2021-03-12 | 国网辽宁省电力有限公司朝阳供电公司 | Design method of fault positioning hardware-in-the-loop simulation system |
-
2014
- 2014-01-03 CN CN201420007026.4U patent/CN203772931U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391227A (en) * | 2014-11-28 | 2015-03-04 | 国家电网公司 | Distribution line online monitoring collection terminal supporting fault recording |
| CN104698337A (en) * | 2015-02-13 | 2015-06-10 | 威胜电气有限公司 | Online recording method of fault indicators |
| CN104793108A (en) * | 2015-05-08 | 2015-07-22 | 国网上海市电力公司 | Discrete low-voltage failure cable identification device |
| CN104808115A (en) * | 2015-05-08 | 2015-07-29 | 国网上海市电力公司 | Split acquisition terminal for recognition of low-voltage faulted cables |
| CN105807126A (en) * | 2016-04-28 | 2016-07-27 | 四川瑞霆电力科技有限公司 | Overhead distribution line zero-sequence current acquisition terminal and method based on clock synchronization |
| CN107966603A (en) * | 2017-09-08 | 2018-04-27 | 国电南瑞科技股份有限公司 | A kind of electric system multi-frequency oscillation real time panoramic monitors method |
| CN108020707A (en) * | 2018-02-05 | 2018-05-11 | 新风光电子科技股份有限公司 | A kind of failure wave-recording control system for SVG |
| CN110441657A (en) * | 2019-08-22 | 2019-11-12 | 深圳华工能源技术有限公司 | Distribution system failure wave-recording method, apparatus and storage medium |
| CN110488159A (en) * | 2019-09-19 | 2019-11-22 | 广东电网有限责任公司 | A kind of application method of distribution O&M monitoring device |
| CN110488159B (en) * | 2019-09-19 | 2024-03-22 | 广东电网有限责任公司 | Application method of distribution network operation and maintenance monitoring equipment |
| CN110794195A (en) * | 2019-11-18 | 2020-02-14 | 北京煜邦电力技术股份有限公司 | Three-phase synchronous sampling method and device and storage medium |
| CN111579926A (en) * | 2020-05-22 | 2020-08-25 | 东北电力大学 | Distributed power fault positioning method for power distribution network |
| CN112487745A (en) * | 2020-11-18 | 2021-03-12 | 国网辽宁省电力有限公司朝阳供电公司 | Design method of fault positioning hardware-in-the-loop simulation system |
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