CN202583332U - Portable AC high voltage one pole type wireless nuclear phase device - Google Patents
Portable AC high voltage one pole type wireless nuclear phase device Download PDFInfo
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- CN202583332U CN202583332U CN 201120542213 CN201120542213U CN202583332U CN 202583332 U CN202583332 U CN 202583332U CN 201120542213 CN201120542213 CN 201120542213 CN 201120542213 U CN201120542213 U CN 201120542213U CN 202583332 U CN202583332 U CN 202583332U
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Abstract
The utility model relates to a portable AC high voltage one pole type wireless nuclear phase device which belongs to the measurement field. The portable AC high voltage one pole type wireless nuclear phase device includes a measuring unit and a handheld unit. The measuring unit has a control circuit which is composed of a measuring hook, a current/voltage conversion module, a shaping and linear amplifying module, an A/D conversion module, a first CPU module, an encoder and emitter module which are connected in order. The handheld unit is composed of a receiver and decoder module, a second CPU module, an LED display module which are connected in order. The control circuit of the measuring unit is completely arranged in an enclosed insulating housing which is hung on a to-be-measured AC high voltage overhead line via the measuring hook. The handheld unit is arranged on the ground, and is used in hand by an on-site measuring person. The entire device is easy to carry, light in weight, is safe, reliable, rapid and accurate, and can be operated wirelessly, thus realizing the high voltage insulation. The nuclear phase measurement result is qualitative and quantitative, and the portable AC high voltage one pole type wireless nuclear phase device can be widely applied to the high-voltage/superhigh voltage AC power line measurement field.
Description
Technical field
The utility model belongs to the field of measurement of electromagnetism variable, relates in particular to a kind of device that is used to measure the phase sequence of three-phase alternating current supply line.
Background technology
Phase sequence is exactly the order of phase place, be the instantaneous value of alternating current from negative value on the occasion of the order successively that changes through null value.
" nuclear phase " test is a testing experiment of checking three-phase supply phase place/phase sequence between the two-way power supply, is one of infrastest and test event of electric system.
If phase place or different AC power " side by side " or " cyclizations " of phase sequence, with producing very big electric current, huge electric current (being commonly called as " circulation ") can cause the damage of electrical equipment.
So; For electric substation after newly-built, renovating and enlarging and transmission line of electricity; And finish at line maintenance, before the user send electricity, all must carry out " nuclear phase " test of three-phase circuit, consistent to guarantee the transmission line of electricity phase sequence with the required phase sequence of user's threephase load; It is after guaranteeing that project of transmitting and converting electricity is completed, one of essential condition that safety puts into operation smoothly.
It is thus clear that " nuclear phase " be (be called " system power supply " to ordinary practice property in the industry and " treating nuclear-electric power supply " distinguished) power supply to two the tunnel; When two road power supplys need when dropping into, carry out " nuclear phase " at point arranged side by side, like the situation of normal " line send two changes " said in the power system operation when same consumer is supplied power.When two road power supplys needed the paired running grid switching operation, like not " nuclear phase ", if the installation connection mistake, it was inconsistent phase sequence (phase place) to occur, will cause the phase fault accident, and serious harm is to the safe operation of electrical network.When two road power supplys need have a power failure grid switching operation; As not " nuclear phase "; Possibly cause the abnormal running of three-phase equipment because phase sequence is inconsistent, like the counter-rotating of motor, on-load tap changers of transformers (also the claiming on-load voltage regulating switch) tripping operation of operating power switch, the loss of electric energy metrical etc.
Therefore, when the second road power supply drops into, must carry out " nuclear phase " test with first via power supply.
Current in electric system mesohigh power distribution network, widespread use two kinds of " nuclear phase " modes are arranged: wired nuclear phase mode and wireless nuclear phase mode.
Principle and concrete operations step about wired " nuclear phase " mode; Be published in the 11st～12 page of 1998 the 8th phases " electrification of the countryside " magazine; Why the author connects the soldier, and title is for having had more detailed narration in " practical electric system nuclear-phase method " literary composition; Concrete device as for this nuclear-phase method constitutes and annexation; In the day for announcing is on June 22nd, 1994; Notification number is that the utility model patent " high-low pressure phase determination device " and the day for announcing of CN2169859Y is on October 14th, 2009; Notification number is all to disclose the annexation between nuclear phase measurement mechanism the most basic, that can accomplish the nuclear phase function and the Qi Ge parts in the utility model patent " general electronic phasing tester " of CN201327513Y, can be for reference.
Concrete technical scheme about wireless " nuclear phase " mode constitutes with device; In the day for announcing is on Dec 12nd, 2007; Notification number is that the Chinese utility model patent " a kind of wireless digital kernel phase system " of CN200989926C, open day are on February 14th, 2007; Publication number is the Chinese utility application " remote digital kernel phase system " of CN1913561A and was on September 16th, 2009 in open day, and publication number is in the Chinese utility application " wireless high-voltage digital phase-checking instrument " of CN101533050A more detailed disclosing to be arranged all; On open was on July 28th, 2010; Publication number is in the Chinese utility application of CN101788614A; Also disclose a kind of " high-low pressure integrated phase-sequence phase meter and detection method thereof ", it adopts the direct voltage divider principle of resistance to realize when hanging down the compression set nuclear phase; And when carrying out high compression set nuclear phase, principle of induction is adopted in sampling; The conversion that it is measured according to the high-low pressure occasion; Make an equipment both can realize that the phase place of phase sequence and the dual power supply circuit of low-voltage active circuit single supply circuit judged, also can realize single supply circuit phase sequence and the phase place judgement of dual power supply the circuit active circuit of high pressure under.
Can know in sum, existing " nuclear phase " method of operating or technical scheme, the one, can only examine two voltages (or voltage difference) between the power supply; Can only qualitative discrimination separate, can not the quantitative phase difference, belong to qualitatively " nuclear phase "; In other words; Can only " qualitative " can not " quantitatively ", only know homophase, do not know difference what.
In addition, the prior art scheme is " ambipolar " normally, and promptly phase checking device must be measured two supply lines (being referred to as " double end wiring " in the industry) simultaneously; The workload of its in-site measurement is big, and survey crew needs repeatedly to climb or upper and lower bar/tower, the measurement mechanism wiring to connect, tear open work numerous and diverse; Be prone to make mistakes; The writing task amount is many, and margin of safety is not enough, can not satisfy the nuclear phase job requirement of existing voltage levels electrical network.
Simultaneously; For the nuclear phase mode of " wireless ", because on-the-spot various electromagnetic interference (EMI) are many, measuring-signal is subject to disturb; Also influenced the accuracy of measurement result; And based on the reason of aspects such as insulation and handling safety, existing wireless " nuclear phase " measurement mechanism can only be adapted to 220,000 volts of electric pressure circuits, and more the phase checking device of voltage levels still can't be accomplished and realized.
The utility model content
The utility model technical matters to be solved provides the wireless phase checking device of a kind of Portable AC high pressure mono-polar; It adopts " one pole " formula measuring method to realize the nuclear phase to the three-phase alternating current high-tension line; Can safety, quantitatively, qualitatively with the phase data in the three-phase alternating current system in the electric system, transfer to display terminal through wireless system, for being incorporated into the power networks of high-voltage fence provides a kind of brand-new nuclear phase measurement means and method; Help to ensure the safe operation of electrical network; Alleviate the work on the spot amount of nuclear phase work, also can adapt to the transformer of the different modes of connection, expanded the scope of application of nuclear phase work.
The technical scheme of the utility model is: provide a kind of Portable AC high pressure mono-polar wireless phase checking device; Comprise measuring unit and handheld unit, it is characterized in that: described measuring unit constitutes control circuit by measurement hook, current/voltage-converted module, shaping and linear amplification module, A/D modular converter, a CPU module and the scrambler and the transmitter module that connect successively; Described handheld unit is by the receptacle and the decoder module that connect successively, the 2nd CPU module, and the light-emitting diode display module constitutes; The control circuit of its described measuring unit all is positioned at the insulation shell of a sealing, is suspended on the ac high-voltage pole line to be measured through measuring hook; Its described handheld unit is positioned at ground, uses by the in-site measurement personnel are hand-held.
Concrete, described measurement hook is a metal hanger.
Described current/voltage-converted module comprises a capacitive load or ohmic load; One end of said capacitive load or ohmic load is connected with the end of measuring hook and the signal input part of shaping and linear amplification module, and the other end of said capacitive load or ohmic load is connected with the common ground point of control circuit.
Described shaping and linear amplification module comprise conventional active band pass filter circuit and conventional discharge circuit.
Described A/D modular converter is conventional A/D change-over circuit.
Described first, second CPU module is conventional single chip circuit.
Described scrambler and transmitter module are conventional wireless signal transmission circuit, and described receptacle and decoder module are conventional wireless signal receiving circuit.
Described light-emitting diode display module is conventional LED display circuit.
Compare with prior art, the utility model has the advantages that:
1. adopt the notion of " virtual ground " current potential to measure the phase place of extra high voltage network, measuring method or measurement equipment aspect have realized " mono-polar " nuclear phase at the scene, have thoroughly broken through the routine measurement thinking and the method for " ambipolar " nuclear phase;
2. owing to adopted " mono-polar " nuclear-phase method, can simplify on-the-spot measuring operation working routine and work operations content greatly, alleviate in-site measurement personnel's working strength, guarantee work quality, improve work efficiency;
3. because whole single-phase phase checking device does not exist actual ground connection and dielectric voltage withstand problem,, be specially adapted to the nuclear phase surveying work of high pressure or UHV (ultra-high voltage) ac power supply line so its scope of application no longer receives the restriction of supply line's electric pressure.
Description of drawings
Fig. 1 is the circuit composition module synoptic diagram of present technique scheme implementation device;
Fig. 2 is the wiring diagram of bandwidth-limited circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
Among Fig. 1; The technical scheme of the utility model provides a kind of Portable AC high pressure mono-polar wireless phase checking device; Comprise measuring unit and handheld unit, its described measuring unit constitutes control circuit by measurement hook, current/voltage-converted module, shaping and linear amplification module, A/D modular converter, a CPU module and the scrambler and the transmitter module that connect successively; Described handheld unit is by the receptacle and the decoder module that connect successively, the 2nd CPU module, and the light-emitting diode display module constitutes; The control circuit of its described measuring unit all is positioned at the insulation shell of a sealing, is suspended on the ac high-voltage pole line to be measured through measuring hook; Its described handheld unit is positioned at ground, uses by the in-site measurement personnel are hand-held.
Can know that by figure " voltage loads, I/V (current/voltage) conversion, shaping and linear amplification; A/D conversion, CPU, scrambler and transmitter " module of the first half is the formation of aforesaid measuring unit; " receptacle and demoder, CPU, the light-emitting diode display " of the latter half is the composition of handheld unit.
On principle; Exchange overhead transmission line between " the earth " being one of existence (because having an air capacitive load over the ground) to vagabond current; The capacity effect of air over the ground that the present technique scheme utilizes the alternating current circuit to exist; Belong to the ac potential/potential difference (PD) between cross streams high-tension line and " the virtual ground " through real-time measurement, and then obtain belonging to the change in voltage square-wave pulse Ti of cross streams high-tension line in real time.
One of key point of present technique scheme, be to utilize AC high voltage over the ground capacitance current and virtual " " scheme derives the relative value of voltage-phase.
Adopting the notion on " virtual ground " is one of key point of present technique scheme; Measurement overhead transmission line in its feasible existing nuclear-phase method and the current/voltage value between the ground; Be changed to and measure current potential or the potential difference (PD) that exchanges between overhead transmission line and " the virtual ground "; Because " virtual ground " is actually " common ground point " of control circuit in the measuring unit; So make " mono-polar " nuclear phase become possibility, the constraint that " nuclear phase " operation of fundamentally breaking away from must be carried out on two cross streams circuits simultaneously also is one of fundamental difference of present technique scheme and prior art.
The measurement parameter that measuring unit adopts the mode of coding and wireless transmit will belong to cross streams high-tension line change in voltage square-wave pulse is sent to the handheld unit that is arranged in ground.
In the present technique scheme, adopt the technical scheme of " lock phase "; Because phase angle at the beginning of each the cross streams circuit of the alternating current circuit, a certain road that has recorded or the voltage square wave pulse Ti of a certain cross streams circuit; Under the control of unified clock signal t; Be stored in and concentrated in the tester, so in fact make the voltage/phase change situation of the single channel of surveying or each phase of two-way AC power, no longer be to have measured at " simultaneously "; Thereby need not to carry out " nuclear phase " according to the operation steps of " must measure the voltage/phase change situation between any two circuits simultaneously " in existing " ambipolar " nuclear-phase method has operated.
As for the phase bit comparison between the two cross streams circuits, the initial phase angle of supposing the first cross streams circuit is ω t+ Φ
1, the initial phase angle of the second cross streams circuit is ω t+ Φ
2, (ω t+ Φ then
1)-(ω t+ Φ
2)=Φ
1-Φ
2
Because the content of above-mentioned phase bit comparison belongs to prior art, so its concrete comparison procedure and realization approach are no longer narrated at this.
Further, potential difference (PD) V between said measurement hook end and " virtual earth " difference i adopts to measure to be connected the electric current of measuring the load between hook end and " virtual earth ", and then obtains the current potential at load two ends and record.
Its described load is electric capacity or resistance.
Described measurement hook end and place cross streams high-tension line equipotential.
Voltage loads is electric capacity or resistance; Described electric capacity or resistance are connected between the common ground point of the metal hanger that is connected with the ac high-voltage circuit and measurement unit controls circuit; Then just having electric current in the load flows through; Through measuring the voltage/potential difference (PD) between this voltage loads and the common ground point, just can convert current signal into voltage signal.
Measured voltage/potential difference signal is carried out voltage amplification, shaping and A/D conversion, can supply CPU to carry out digital processing and carried out subsequent step its digitizing.
Current/voltage-converted module among the figure comprises a capacitive load or ohmic load; One end of said capacitive load or ohmic load is connected with the end of measuring hook and the signal input part of shaping and linear amplification module, and the other end of said capacitive load or ohmic load is connected with the common ground point of control circuit.
Its shaping and linear amplification module comprise conventional active band pass filter circuit and conventional discharge circuit.
Its A/D modular converter is conventional A/D change-over circuit.
Its first, second CPU module is conventional single chip circuit.
Its scrambler and transmitter module are conventional wireless signal transmission circuit.
Receptacle and decoder module are conventional wireless signal receiving circuit.
Its light-emitting diode display module is conventional LED display circuit.
Because above-mentioned involved module is the existing conventional functional circuit, so its concrete circuit formation, principle of work and connected mode are no longer narrated at this.
Because comparison/calculating and storage, coding and the wireless transmitter module of current potential through the load measure point or potential difference (PD), the amplifying circuit to the measurement of alternating current circuit voltage/phase place, alternating signal, A/D conversion module, phase differential and concentrating the phase place and the phase differential numerical value that show on the tester or export between resulting each cross streams circuit to be prior art are so its concrete principle is with specifically line construction, annexation are no longer narrated at this.
Among Fig. 2; Provided the enforcement wiring diagram of active band pass filter circuit, in circuit module shown in Figure 1, the voltage signal that is obtained carried out I/V (current/voltage) conversion after; Need carry out shaping and linear amplification, its shaping realizes through the active band pass filter circuit of this figure.
The principle of BPF. is that a low-pass filter adds a Hi-pass filter, and the upper cut-off frequency of BPF. is the upper cut-off frequency of low-pass filter, and the lower-cut-off frequency of BPF. is the lower-cut-off frequency of Hi-pass filter.
In other words, the circuit module that on certain frequency, can let inductance and electric capacity form exactly reaches resonance, get final product like this with signal needed, designated frequency range be easy to through, the clutter of other frequency ranges or high-frequency harmonic are all by filtering as much as possible.
Adopting active band-pass filter is in order to overcome the defective of passive filter, and it not only has the basic function of passive filter, has also increased at least three advantages: 1, input resistance increases, and can effectively utilize the output signal of signal source; 2, increased the enlargement factor of circuit, for load provides higher available signal; 3, the size of load and whether existing can not exert an influence to exporting signal.
After adopting above-mentioned active band pass filter circuit, can improve the measures signal quality that obtains greatly, get rid of the various electromagnetic interference (EMI) of frequency beyond 50Hz, improve the antijamming capability of measuring-signal, also improve and ensured the accuracy of measurement result.
Because active band-pass filter is a prior art; So its concrete circuit constitutes and principle of work is no longer narrated at this; This figure has provided element concrete in this circuit embodiments and has constituted and interconnected relationship; Those skilled in the art can be appreciated and understood that its concrete formation and annexation fully undoubtedly, so its principle of work and signals transmission are no longer narrated at this.
Because operating index such as the frequency of the utility model employing one pole method of testing detection high-tension line and phase place; Can safety, quantitatively, qualitatively with the phase data in the three-phase alternating current system in the electric system; Transfer to display terminal through wireless system; The abnormal running situation of convenient and swift detection of ability and discovery high-voltage web system; Be safety, convenience, voltage and current phase differential between network system high pressure (once) side detection system voltage, electric current, frequency and phase/phase reliably, each item the key technical indexes such as power factor (PF) provide a kind of new means of testing and method.
Its whole testing device is easy to carry; In light weight; Wireless remote control operation has really realized High-Voltage Insulation, has reached safe and reliable, purpose fast and accurately; Its nuclear phase measurement result can realize qualitative, quantitative, in the safeguards system safe operation with prevent that aspect application prospect such as high pressure stealing is very broad.
The utility model can be widely used in the field of measurement of high pressure/UHV (ultra-high voltage) ac power supply line.
Claims (8)
1. the wireless phase checking device of Portable AC high pressure mono-polar comprises measuring unit and handheld unit, it is characterized in that:
Described measuring unit constitutes control circuit by measurement hook, current/voltage-converted module, shaping and linear amplification module, A/D modular converter, a CPU module and the scrambler and the transmitter module that connect successively;
Described handheld unit is by the receptacle and the decoder module that connect successively, the 2nd CPU module, and the light-emitting diode display module constitutes;
The control circuit of its described measuring unit all is positioned at the insulation shell of a sealing, is suspended on the ac high-voltage pole line to be measured through measuring hook;
Its described handheld unit is positioned at ground, uses by the in-site measurement personnel are hand-held.
2. according to the wireless phase checking device of the described Portable AC high pressure of claim 1 mono-polar, it is characterized in that described measurement hook is a metal hanger.
3. according to the wireless phase checking device of the described Portable AC high pressure of claim 1 mono-polar; It is characterized in that described current/voltage-converted module comprises a capacitive load or ohmic load; One end of said capacitive load or ohmic load is connected with the end of measuring hook and the signal input part of shaping and linear amplification module, and the other end of said capacitive load or ohmic load is connected with the common ground point of control circuit.
4. according to the wireless phase checking device of the described Portable AC high pressure of claim 1 mono-polar, it is characterized in that described shaping and linear amplification module comprise conventional active band pass filter circuit and conventional discharge circuit.
5. according to the wireless phase checking device of the described Portable AC high pressure of claim 1 mono-polar, it is characterized in that described A/D modular converter is conventional A/D change-over circuit.
6. according to the wireless phase checking device of the described Portable AC high pressure of claim 1 mono-polar, it is characterized in that described first, second CPU module is conventional single chip circuit.
7. according to the wireless phase checking device of the described Portable AC high pressure of claim 1 mono-polar, it is characterized in that described scrambler and transmitter module are conventional wireless signal transmission circuit, described receptacle and decoder module are conventional wireless signal receiving circuit.
8. according to the wireless phase checking device of the described Portable AC high pressure of claim 1 mono-polar, it is characterized in that described light-emitting diode display module is conventional LED display circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120542213 CN202583332U (en) | 2011-12-21 | 2011-12-21 | Portable AC high voltage one pole type wireless nuclear phase device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120542213 CN202583332U (en) | 2011-12-21 | 2011-12-21 | Portable AC high voltage one pole type wireless nuclear phase device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202583332U true CN202583332U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120542213 Expired - Fee Related CN202583332U (en) | 2011-12-21 | 2011-12-21 | Portable AC high voltage one pole type wireless nuclear phase device |
Country Status (1)
| Country | Link |
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| CN (1) | CN202583332U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021891A (en) * | 2015-08-03 | 2015-11-04 | 国家电网公司 | Power distribution network base station type nuclear phase apparatus |
| CN105470944A (en) * | 2015-11-09 | 2016-04-06 | 国网山东省电力公司济南供电公司 | Intelligent and safe phase checking system |
| CN108303142A (en) * | 2018-03-23 | 2018-07-20 | 广州市科钛科技有限公司 | Determine phase nuclear phase, electric current, the harvester of voltage and system for telecommunication network base station |
-
2011
- 2011-12-21 CN CN 201120542213 patent/CN202583332U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021891A (en) * | 2015-08-03 | 2015-11-04 | 国家电网公司 | Power distribution network base station type nuclear phase apparatus |
| CN105470944A (en) * | 2015-11-09 | 2016-04-06 | 国网山东省电力公司济南供电公司 | Intelligent and safe phase checking system |
| CN108303142A (en) * | 2018-03-23 | 2018-07-20 | 广州市科钛科技有限公司 | Determine phase nuclear phase, electric current, the harvester of voltage and system for telecommunication network base station |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20191221 |
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| CF01 | Termination of patent right due to non-payment of annual fee |