CN205193209U - Neutral point is through arc suppressing coil ground connection power system fault route selection device - Google Patents
Neutral point is through arc suppressing coil ground connection power system fault route selection device Download PDFInfo
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- CN205193209U CN205193209U CN201521015123.9U CN201521015123U CN205193209U CN 205193209 U CN205193209 U CN 205193209U CN 201521015123 U CN201521015123 U CN 201521015123U CN 205193209 U CN205193209 U CN 205193209U
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Abstract
The utility model relates to a neutral point is through arc suppressing coil ground connection power system fault route selection device, its major technical features is: compare module and the processing module of system including power module, data acquisition module, signal processing module, trouble sample, power module is connected with other modules for the power supply of whole route selection device, data acquisition module's input and neutral point are connected through arc suppressing coil ground connection electric wire netting, and this data acquisition module's output links to each other with signal processing module's input, the input that the module was compared to signal processing module's output and trouble sample links to each other, the trouble sample is compared the module and comprises storage chip and assay circuit, and the output that the module was compared to this trouble sample links to each other with the processing module's of system input. The utility model discloses a current sudden change volume circuit combines the processing module of system to carry out analysis processes to data, has improved precision and efficiency greatly, can solve the trouble route selection problem of neutral point through arc suppressing coil ground connection electric wire netting effectively.
Description
Technical field
The utility model belongs to arc suppression coil technical field, especially a kind of neutral by arc extinction coil grounding electric network fault line selection apparatus.
Background technology
Neutral by arc extinction coil grounding is widely used in Medial & Low Voltage Power Network as a kind of mode in small current neutral grounding system, effectively can improve the reliability of power supply.When there is singlephase earth fault, healthy phases voltage is close to line voltage, system stable operation is made a big impact, in order to avoid there is the generation of above-mentioned situation, system requirements is after generation singlephase earth fault, looking up the fault circuit and trouble spot as early as possible, and by failture evacuation, ensure that system other parts normal safe runs.Therefore, how selecting the top priority that faulty line becomes Medial & Low Voltage Power Network protection fast, is also improve the important critical problem of of Distribution System Integrated Automation integral level.
Early stage failure line selection mainly adopts the method for manually successively operating a switch to realize, although this method accuracy rate is higher, but often operate a capital to impact system, and switching overvoltage or resonance overvoltage may be caused, and manually select faulty line to waste time and energy, because circuit broken by needs, power supply continuity and the power supply reliability of user can not be ensured.From the later stage eighties in last century, along with the appearance of microcomputer line selection apparatus, utilize microcomputer line selection apparatus can avoid the shortcoming of artificial route selection of successively operating a switch preferably.But the practical operation situation of microcomputer line selection apparatus is unsatisfactory, route selection accuracy is not high, although a lot of place is all provided with line selection apparatus, most device is all in not enabled state.At present, resonant earthed system be there is to the selection method of some comparative maturities, such as intelligence is than Intelligentized methods such as width phase comparing method, zero-sequence current real component method and 5 subharmonic methods, but, do not have a kind of selection method can ensure all fault types all effective, cause the reliability of route selection result greatly to reduce.Therefore, faulty line and the trouble spot of how to search neutral by arc extinction coil grounding electrical network are rapidly and accurately problems in the urgent need to address at present.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of reasonable in design, accuracy is high, fireballing neutral by arc extinction coil grounding electric network fault line selection apparatus.
The utility model solves its technical matters and takes following technical scheme to realize:
A kind of neutral by arc extinction coil grounding electric network fault line selection apparatus, comprises power module, data acquisition module, signal processing module, fault sample comparing module and system processing module; Described power module is connected with other modules for whole line selection apparatus is powered; The input end of described data acquisition module is connected with neutral by arc extinction coil grounding electrical network, and the output terminal of this data acquisition module is connected with the input end of signal processing module; The output terminal of described signal processing module is connected with the input end of fault sample comparing module; Described fault sample comparing module is made up of storage chip and analysis circuit, and the output terminal of this fault sample comparing module is connected with the input end of system processing module.
Further, described data acquisition module is connected and composed by current transformer, current break circuit, the input end of this current transformer is connected in neutral by arc extinction coil grounding electrical network, the output terminal of current transformer is connected with the input end of current break circuit, and the output terminal of current break circuit is connected with the input end of signal processing module.
Further, described current transformer is threephase current transformer and adopts AKH-0.66 model; Described current break circuit adopts turn-adjusting arc-extinguishing winding.
Further, described signal processing module is connected and composed by signal processing circuit and A/D change-over circuit, the input end of signal processing circuit is connected with the output terminal of the current break circuit of data acquisition module, the output terminal of signal processing circuit is connected with the input end of A/D change-over circuit, and the output terminal of A/D change-over circuit is connected with the input end of fault sample comparing module.
Further, described signal processing circuit is made up of pre-amplification circuit, filtering circuit and main amplifying circuit, this pre-amplification circuit is made up of two panels precision operational-amplifier OP37 and R, C network, and this filtering circuit adopts MAX275 chip, and main amplifying circuit adopts high speed operation amplifier AD8225.
Further, described fault sample comparing module is made up of storage chip and analysis circuit, and the output terminal of fault sample comparing module is connected with human-computer interaction module with DSP processing module.
Further, described system processing module is made up of DSP module, human-computer interaction module, failure wave-recording module and watchdog circuit; The input end of DSP processing module is connected with fault sample comparing module, and the output terminal of DSP processing module is connected with the input end of human-computer interaction module, failure wave-recording program module, watchdog circuit module; The input end of this human-computer interaction module is connected with the output terminal of DSP processing module, fault sample comparing module, and this human-computer interaction module is also bi-directionally connected with failure wave-recording program module.
Further, described DSP module adopts TMS320F2407 series module, described human-computer interaction module is made up of SED1335 series liquid crystal display and physical keyboard, described failure wave-recording program module adopts the digital line fault oscillograph of WLB-2000A, and described watchdog circuit adopts MAX813L chip.
Advantage of the present utility model and good effect are:
1, the utility model adopts jump-value of current circuit coupling system processing module carries out analyzing and processing to data, improves accuracy and the processing speed of route selection, effectively can solve the failure line selection problem of neutral by arc extinction coil grounding electrical network.
2, produced problem can carry out analyzing and break down with the institute in past and contrasts by fault analysis of the present utility model contrast module, directly can point out network system guilty culprit, substantially increase precision and efficiency to FAQs; Meanwhile, with memory chip, memory storage is carried out to new fault, improve systematic analysis failures.
3, the utility model adopts modular design structure, each module is divided the work clear and definite, optimizes the structure of system.
4, system processing module of the present utility model adopts TMS320LF2407 chip, has nearly more than 40 universal input and exports, can greatly simplify hardware configuration, volume, improve system stability and reliability.
Accompanying drawing explanation
Fig. 1 is integrated circuit block scheme of the present utility model;
Fig. 2 is the processing procedure schematic diagram of fault sample comparing module of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is further described:
A kind of neutral by arc extinction coil grounding electric network fault line selection apparatus, as shown in Figure 1, comprises power module, data acquisition module, signal processing module, fault sample comparing module and system processing module.Described power module is connected with modules for whole line selection apparatus is powered.The input end of described data acquisition module is connected with neutral by arc extinction coil grounding electrical network, and the output terminal of this data acquisition module is connected with the input end of signal processing module; The output terminal of described signal processing module is connected with the input end of fault sample comparing module; The output terminal of described fault sample comparing module is connected with the input end of system processing module.
Described data acquisition module is connected and composed by current transformer, current break circuit.The input end of current transformer is connected in neutral by arc extinction coil grounding electrical network, and the output terminal of current transformer is connected with the input end of current break circuit, and the output terminal of current break circuit is connected with the input end of signal processing module.In the present embodiment, current transformer is threephase current transformer, adopts AKH-0.66 model.Current break circuit selects turn-adjusting arc-extinguishing winding to change arc suppression coil parameter, makes each line fault electric current produce a sudden change, selects the parameter of faulty circuit according to the difference of faulty circuit and healthy circuit.
Described signal processing module is connected and composed by signal processing circuit and A/D change-over circuit, the input end of signal processing circuit is connected with the output terminal of the current break circuit of data acquisition module, the output terminal of signal processing circuit is connected with the input end of A/D change-over circuit, and the output terminal of A/D change-over circuit is connected with the input end of fault sample comparing module.In the present embodiment, signal processing circuit is made up of pre-amplification circuit, filtering circuit and main amplifying circuit, pre-amplification circuit is made up of two panels precision operational-amplifier OP37 and R, C network, received electric signal can be carried out power amplification, by MAX275 chip, filtering is carried out to signal again, to eliminate jamming incoherent signal, then high speed operation amplifier AD8225 is adopted to amplify signal via main amplifying circuit.
Described fault sample comparing module is made up of storage chip and analysis circuit, and the output terminal of fault sample comparing module is connected with human-computer interaction module with DSP processing module.As shown in Figure 2, the processing procedure of described fault sample comparing module is: whether beginning → initialization → sampling → extraction fault sample → fault sample the same with reference sample → and be show result and carry out failure wave-recording → end; → otherwise feature-extraction analysis → route selection result → result shows and carries out failure wave-recording → end to utilize criterion to draw.
Described system processing module is made up of DSP module, human-computer interaction module, failure wave-recording module and watchdog circuit.Wherein the input end of DSP processing module is connected with fault sample comparing module, and wherein the output terminal of DSP processing module is connected with the input end of human-computer interaction module, failure wave-recording program module, watchdog circuit module.The input end of this human-computer interaction module is connected with the output terminal of DSP processing module, fault sample comparing module, and human-computer interaction module is also bi-directionally connected with failure wave-recording program module.In the present embodiment, DSP module adopts TMS320F2407 series module, adopts method of wavelet packet to carry out computational analysis to data simultaneously.Human-computer interaction module is made up of liquid crystal display and physical keyboard, and this liquid crystal display adopts SED1335 series module.Failure wave-recording program module adopts the digital line fault oscillograph of WLB-2000A.Watchdog circuit adopts MAX813L chip.
Principle of work of the present utility model and process are: first, and primary current larger for the numerical value collected is converted to and can supplies that measure, that numerical value is less secondary current by current transformer, and by current delivery to current break circuit.Current break circuit, after obtaining the signal that current transformer transmits, by changing the parameter of arc suppression coil, makes faulty circuit electric current produce sudden change, then using the circuit differences of failure line selection and non-faulting route selection circuit as signal going down.Then by signal processing module, signal is converted to fault sample comparing module desired signal, by fault sample comparing module, signal is analyzed again, if fault sample is identical with the reference sample stored in data base, then directly draws failure cause and pass to human-computer interaction module and carry out malfunction coefficient; If not identical, to fault signature extraction and analysis again, pass to DSP module and utilize Wavelet Packet Algorithm to carry out digital assay and process to fault-signal, then carry out failure wave-recording by failure wave-recording program module, after obtaining a result, utilize human-computer interaction module to show.By watchdog circuit, tutelage is carried out to system in whole process.
The utility model is not addressed part and is applicable to prior art.
It is emphasized that; embodiment described in the utility model is illustrative; instead of it is determinate; therefore the utility model comprises the embodiment be not limited to described in embodiment; every other embodiments drawn according to the technical solution of the utility model by those skilled in the art, belong to the scope of the utility model protection equally.
Claims (7)
1. a neutral by arc extinction coil grounding electric network fault line selection apparatus, is characterized in that: comprise power module, data acquisition module, signal processing module, fault sample comparing module and system processing module; Described power module is connected with other modules for whole line selection apparatus is powered; The input end of described data acquisition module is connected with neutral by arc extinction coil grounding electrical network, and the output terminal of this data acquisition module is connected with the input end of signal processing module; The output terminal of described signal processing module is connected with the input end of fault sample comparing module; Described fault sample comparing module is made up of storage chip and analysis circuit, and the output terminal of this fault sample comparing module is connected with the input end of system processing module.
2. a kind of neutral by arc extinction coil grounding electric network fault line selection apparatus according to claim 1, it is characterized in that: described data acquisition module is connected and composed by current transformer, current break circuit, the input end of this current transformer is connected in neutral by arc extinction coil grounding electrical network, the output terminal of current transformer is connected with the input end of current break circuit, and the output terminal of current break circuit is connected with the input end of signal processing module.
3. a kind of neutral by arc extinction coil grounding electric network fault line selection apparatus according to claim 2, is characterized in that: described current transformer is threephase current transformer and adopts AKH-0.66 model; Described current break circuit adopts turn-adjusting arc-extinguishing winding.
4. a kind of neutral by arc extinction coil grounding electric network fault line selection apparatus according to claim 1, it is characterized in that: described signal processing module is connected and composed by signal processing circuit and A/D change-over circuit, the input end of signal processing circuit is connected with the output terminal of the current break circuit of data acquisition module, the output terminal of signal processing circuit is connected with the input end of A/D change-over circuit, and the output terminal of A/D change-over circuit is connected with the input end of fault sample comparing module.
5. a kind of neutral by arc extinction coil grounding electric network fault line selection apparatus according to claim 4, it is characterized in that: described signal processing circuit is made up of pre-amplification circuit, filtering circuit and main amplifying circuit, this pre-amplification circuit is made up of two panels precision operational-amplifier OP37 and R, C network, this filtering circuit adopts MAX275 chip, and main amplifying circuit adopts high speed operation amplifier AD8225.
6. a kind of neutral by arc extinction coil grounding electric network fault line selection apparatus according to claim 1, is characterized in that: described system processing module is made up of DSP module, human-computer interaction module, failure wave-recording module and watchdog circuit; The input end of DSP processing module is connected with fault sample comparing module, and the output terminal of DSP processing module is connected with the input end of human-computer interaction module, failure wave-recording program module, watchdog circuit module; The input end of this human-computer interaction module is connected with the output terminal of DSP processing module, fault sample comparing module, and this human-computer interaction module is also bi-directionally connected with failure wave-recording program module.
7. a kind of neutral by arc extinction coil grounding electric network fault line selection apparatus according to claim 6, it is characterized in that: described DSP module adopts TMS320F2407 series module, described human-computer interaction module is made up of SED1335 series liquid crystal display and physical keyboard, described failure wave-recording program module adopts the digital line fault oscillograph of WLB-2000A, and described watchdog circuit adopts MAX813L chip.
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| CN201521015123.9U CN205193209U (en) | 2015-12-09 | 2015-12-09 | Neutral point is through arc suppressing coil ground connection power system fault route selection device |
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| CN201521015123.9U CN205193209U (en) | 2015-12-09 | 2015-12-09 | Neutral point is through arc suppressing coil ground connection power system fault route selection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624440A (en) * | 2020-05-26 | 2020-09-04 | 襄阳科能机电设备有限公司 | Single phase grounding fault line selection device in neutral point through arc suppression coil grounding system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624440A (en) * | 2020-05-26 | 2020-09-04 | 襄阳科能机电设备有限公司 | Single phase grounding fault line selection device in neutral point through arc suppression coil grounding system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20161209 |
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| CF01 | Termination of patent right due to non-payment of annual fee |