CN104297559A - Device and method for measuring induced voltage - Google Patents
Device and method for measuring induced voltage Download PDFInfo
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- CN104297559A CN104297559A CN201410623963.7A CN201410623963A CN104297559A CN 104297559 A CN104297559 A CN 104297559A CN 201410623963 A CN201410623963 A CN 201410623963A CN 104297559 A CN104297559 A CN 104297559A
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Abstract
The invention discloses a device and a method for measuring induced voltage. The device comprises a voltage dividing part, an analog-to-digital conversion part and a processor, wherein the voltage dividing part is connected with a high-voltage wire and is used for dividing the induced voltage in the high-voltage wire; the analog-to-digital conversion part is connected with the voltage dividing part and is used for performing analog-to-digital conversion on the induced voltage divided by the voltage dividing part; the processor is connected with the analog-to-digital conversion part and is used for computing the induced voltage. The device is capable of quickly measuring the voltage value of the induced voltage.
Description
Technical field
The present invention relates to electric field, particularly relate to a kind of device and method measuring induced voltage.
Background technology
Induced voltage includes electromagnetic induction voltage, electrostatic induction voltage; Wherein, electromagnetic induction voltage is that alternating current in ultra-high-tension power transmission line can produce not balanced alternating magnetic field at its surrounding space.According to electromagnetic induction principle, during the adjacent power supply through line of magnetic force line cutting that electric current produces, vertical interference will be produced; Because the mutual inductance of electromagnetic coupled three-phase is uneven, residual voltage over the ground will be sensed on dead line.Electrostatic induction voltage is ultra-high-tension power transmission line and there is coupling capacitance between underlying conductor and the earth, when ultra-high-tension power transmission line has High AC voltage, will produce high-voltage electric field at proximity space, thus make spatial points possess certain current potential; Be in the dead line in electric field, because capacity effect will produce electrostatic coupling.
In recent years, along with the raising of electric pressure and developing rapidly of transmission line of electricity, some are parallel or joint use the circuit that double back runs and get more and more, and simultaneously the scissors crossing phenomenon of high-voltage circuit and low-voltage-grade circuit is also general all the more.Therefore, when certain line outage maintenance, it still may be in strong-electromagnetic field, therefore can produce induced voltage and induction current on this stoppage in transit circuit, when induced voltage and induction current exceed certain limit, serious threat can be caused to the personal safety of operating personnel.
Current electroscope can only be made induced voltage and judging qualitatively, definitely cannot obtain the size of induced voltage, cannot learn whether the induced voltage in circuit exceedes safe range, therefore cannot take appropriate measures the danger reducing practitioner, and to a certain degree also have impact on the follow-up progress of work.
Therefore, how the size of the magnitude of voltage of Quick Measurement induced voltage, is those skilled in the art's technical issues that need to address.
Summary of the invention
The object of this invention is to provide a kind of device measuring induced voltage, this device can the size of magnitude of voltage of Quick Measurement induced voltage; Another object of the present invention is to provide a kind of method measuring induced voltage.
For solving the problems of the technologies described above, the invention provides a kind of device measuring induced voltage, this device comprises:
Be connected with hi-line, the voltage in described hi-line carried out to point pressure part of dividing potential drop;
Be connected with described point of pressure part, to described point of pressure part the voltage that divides carry out analog-to-digital analog to digital conversion means;
Be connected with described analog to digital conversion means, calculate the processor of induced voltage.
Wherein, the device measuring induced voltage also comprises:
Be connected with described processor with described point of pressure part respectively, to described point of pressure part the voltage that divides carry out waveform conversion, and the result that waveform converts is sent to the waveform transform component of processor, wherein, described processor utilizes described result to calculate, and obtains the phase place of described voltage.
Wherein, the device measuring induced voltage also comprises:
Be connected with described point of pressure part, by point pressure part described in mutual induction of voltage comparison the voltage that divides according to described mutual induction of voltage than the mutual induction of voltage parts carrying out converting;
Be connected with described analog to digital conversion means with described mutual induction of voltage parts respectively, to the Hyblid Buffer Amplifier parts that described mutual induction of voltage parts process than the voltage after converting according to described mutual induction of voltage.
Wherein, the device measuring induced voltage also comprises:
The range switching part be connected with described Hyblid Buffer Amplifier parts with described mutual induction of voltage parts respectively.
Wherein, the device measuring induced voltage also comprises:
Be connected with described processor, the display unit of display measurement data.
Wherein, described point of pressure part comprises: resitstance voltage divider.
The invention provides a kind of method measuring induced voltage, the method comprises:
By a point pressure part, dividing potential drop is carried out to the voltage in hi-line, obtain analog voltage-dividing voltage;
Described analog voltage-dividing voltage is converted into corresponding digital voltage signal by analog to digital conversion means;
By the magnitude of voltage that calculate induced voltage of described digital voltage signal by processor.
Wherein, the method measuring induced voltage also comprises:
Described analog voltage-dividing voltage is converted to square-wave signal by waveform transform component;
By the phase value that calculate induced voltage of described square-wave signal by processor.
Wherein, described hi-line comprises: three-phase high-voltage line, wherein,
Described by dividing a pressure part to carry out dividing potential drop to the voltage in hi-line, obtain analog voltage-dividing voltage method and comprise:
Utilize a point of pressure part to carry out dividing potential drop successively to the voltage in three-phase high-voltage line, obtain analog voltage-dividing voltage;
Or utilize three points of pressure parts to carry out dividing potential drop to the voltage in three-phase high-voltage line simultaneously, obtain analog voltage-dividing voltage.
Wherein, described hi-line comprises: the three-phase high-voltage line of different size, wherein,
Described by dividing a pressure part to carry out dividing potential drop to the voltage in hi-line, obtain analog voltage-dividing voltage method and comprise:
Utilize a kind of specification to divide pressure part to carry out dividing potential drop to the voltage in three-phase high-voltage line, obtain analog voltage-dividing voltage;
Or utilize different size to divide pressure part to carry out dividing potential drop to the voltage in corresponding three-phase high-voltage line, obtain analog voltage-dividing voltage.
Based on technique scheme, the device of measurement induced voltage provided by the present invention, comprises and being connected with hi-line, the voltage in described hi-line is carried out to point pressure part of dividing potential drop; Be connected with described point of pressure part, to described point of pressure part the voltage that divides carry out analog-to-digital analog to digital conversion means; Be connected with described analog to digital conversion means, calculate the processor of induced voltage; The induced voltage of hi-line can be carried out dividing potential drop in proportion by a point pressure part, utilize small voltage to measure, the numerical value of induced voltage in high-tension line is obtained by the value of small voltage, by described point of pressure part the voltage that divides pass to analog to digital conversion means, pass through analog to digital conversion, obtain corresponding digital voltage signal, described digital voltage signal is passed to processor, processor carry out calculating corresponding point pressure part the magnitude of voltage of voltage that divides, obtained the magnitude of voltage of the induced voltage in hi-line by voltage divider principle.By technique scheme, the size of the magnitude of voltage of induced voltage can be measured, be convenient for people to judge according to the size of magnitude of voltage, thus follow-up work can be carried out easily, also ensure the life security of operating personnel.
Accompanying drawing explanation
In order to the technical scheme of the clearer explanation embodiment of the present invention or prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 measures the structured flowchart of the device of induced voltage for embodiment one that the embodiment of the present invention provides;
Fig. 2 measures the structured flowchart of the device of induced voltage for embodiment two that the embodiment of the present invention provides;
Fig. 3 measures the structured flowchart of the device of induced voltage for embodiment three that the embodiment of the present invention provides;
Fig. 4 measures the structured flowchart of the device of induced voltage for embodiment four that the embodiment of the present invention provides;
Fig. 5 measures the structured flowchart of the device of induced voltage for embodiment five that the embodiment of the present invention provides;
Fig. 6 measures the structured flowchart of the device of induced voltage for embodiment six that the embodiment of the present invention provides;
The structured flowchart of the device of induced voltage is measured in the embodiment seven three-phase high-voltage circuit that Fig. 7 provides for the embodiment of the present invention;
The process flow diagram of the method for the measurement induced voltage that Fig. 8 provides for the embodiment of the present invention;
The process flow diagram of the method for induced voltage phase place in the measurement induced voltage that Fig. 9 provides for the embodiment of the present invention.
Embodiment
Core of the present invention is to provide a kind of device measuring induced voltage, and this device can the size of magnitude of voltage of Quick Measurement induced voltage; Another object of the present invention is to provide a kind of method measuring induced voltage.
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Because qualified electroscope trigger voltage scope is 0.15 ~ 0.40 times of rated voltage, and numerical value Presentation Function is neither with by the electroscope generally used now at present, when therefore using electroscope electrical verification, therefore can only make one to judge qualitatively, and a definite magnitude of voltage cannot be obtained, therefore cannot determine whether to work.
The size factor affecting induced voltage in circuit comprises: circuit operation conditions, parallel circuit length, alternate and loop spacing, wire transposition mode, normal working line breaker operator etc., and this just makes faradic calculating more difficult; Therefore, line design unit does not generally provide the calculated value of designed line influence voltage, and we also just cannot judge faradic size by the mode of the data of searching.
Please refer to Fig. 1, the embodiment one that Fig. 1 gives the embodiment of the present invention to be provided measures the structured flowchart of the device of induced voltage; This device comprises: point pressure part 100, analog to digital conversion means 200, processor 300, wherein,
Dividing pressure part 100, being connected with hi-line, for carrying out dividing potential drop to the voltage in described hi-line;
Wherein, voltage divider principle is utilized to carry out gathering the induced voltage in high-tension line here; In general, point pressure part 100 inside be one by resistance (electric capacity) element bleeder circuit in series, according to voltage distribution rule, the voltage that each load is assigned to is proportional with its impedance, can be used to measurement ac high-voltage.
Here a point pressure part 100 can adopt resitstance voltage divider or capacitive divider; Wherein, high-voltage arm and the low-voltage arm of resitstance voltage divider are formed by resistor, and the foundation of its dividing potential drop is resistance value, and voltage ratio is (R1+R2)/R2.The small size resitstance voltage divider of particular design, the measurement of the voltage within the scope of may be used for millisecond; High-voltage arm and the low-voltage arm of capacitive divider all adopt electric capacity, and the foundation of its dividing potential drop is capacitor value, and intrinsic standoff ratio is (C1+C2)/C1.Due to capacitor every straight characteristic, require that measured signal is alternating current, and the frequency of alternating current can not be too low or too high, and capacitive divider compressive resistance is large, not easily puncture, but volume is relatively large, carries inconvenience and price is higher.
Here pressure part 100 is divided to be connected with hi-line, for carrying out dividing potential drop to the induced voltage in described hi-line, namely the voltage after utilizing point pressure part 100 to gather the dividing potential drop of the induced voltage in described high-tension line, here consider in safety rule and the safe distance of 10KV, 35KV, 110KV circuit is required and portability, preferably, adopt resistor rod with addition of the use-pattern of stock, utilize this mode to carry out being connected to hi-line, dividing potential drop is carried out to the voltage in hi-line.
Analog to digital conversion means 200, is connected with described point of splenium 100, for described point of pressure part 100 the voltage that divides carry out analog to digital conversion;
Wherein, analog to digital conversion means 200 is connected with processor 300 respectively at a point pressure part 100, for described point of pressure part 100 the voltage that divides be analog voltage, sample, obtain digital voltage signal.
Processor 300, is connected with described analog to digital conversion means 200, for calculating the magnitude of voltage of induced voltage according to the result of analog to digital conversion means 200.
Processor 300 is connected with described analog to digital conversion means 200, is calculated by the digital voltage signal that described analog to digital conversion means 200 obtains, and at the dividing ratios according to point pressure part, finally obtains the magnitude of voltage in hi-line.
Optionally, the device of the measurement induced voltage in the present invention comprises battery, battery can select lead-acid battery, lithium battery etc., due to lithium battery, to have quality light, self-discharge rate is lower, but energy comparison is high, and lithium battery therefore preferably can be selected here to carry out powering miscellaneous part can normally be worked as the power supply of device.
Optionally, in lithium battery, can battery charge monitor be had, can monitor battery electric quantity, learn the need of charging to facilitate.Optionally, in lithium battery, can electric quantity indicator be had, the electricity of battery can be shown.Optionally, carrying out measuring in the test of induced voltage, lithium battery can convert through DC-DC, output ± 5V power supply, can be used for device to use.
The device of measurement induced voltage provided by the present invention, comprises and being connected with hi-line, the voltage in described hi-line is carried out to point pressure part of dividing potential drop; Be connected with described point of pressure part, to described point of pressure part the voltage that divides carry out analog-to-digital analog to digital conversion means; Be connected with described analog to digital conversion means, calculate the processor of induced voltage; The induced voltage of hi-line can be carried out dividing potential drop in proportion by a point pressure part, utilize small voltage to measure, the numerical value of induced voltage in high-tension line is obtained by the value of small voltage, by described point of pressure part the voltage that divides pass to analog to digital conversion means, pass through analog to digital conversion, obtain corresponding digital voltage signal, described digital voltage signal is passed to processor, processor carry out calculating corresponding point pressure part the magnitude of voltage of voltage that divides, obtained the magnitude of voltage of the induced voltage in hi-line by voltage divider principle.By technique scheme, the size of the magnitude of voltage of induced voltage can be measured, be convenient for people to judge according to the size of magnitude of voltage, thus follow-up work can be carried out easily, also ensure the life security of operating personnel.
Optionally, described point of pressure part 100 comprises resitstance voltage divider.
Wherein, high-voltage arm and the low-voltage arm of resitstance voltage divider are formed by resistor, and the foundation of its dividing potential drop is resistance value, and voltage ratio is (R1+R2)/R2.The small size resitstance voltage divider of particular design, the measurement of the voltage within the scope of may be used for millisecond; And resitstance voltage divider general performance is more stable, volume is little, and precision is high, is easy to carry about with one and low price; Therefore preferred version uses resitstance voltage divider.
Optionally, processor can select single-chip microcomputer or digital signal processor, wherein, Single Chip Microcomputer (SCM) system structure is simple, and easy to use, reliability is high, processing capacity is strong, and speed is fast, low-voltage, low-power consumption, controlling functions is strong, and application is extensive, ripe, market has the professional tools such as a large amount of development boards, and function is relative with operation simple, price is also cheap; Digital signal processor, with digital signal to process the microprocessor of bulk information, not only programmable, and also time in fact, travelling speed can reach every number of seconds with ten million bar complicated order program, considerably beyond general purpose microprocessor, there is powerful data-handling capacity and high travelling speed.But range of application does not have single-chip microcomputer extensive, and market also lacks corresponding developing instrument, powerful, complicated operation; Here preferably single-chip microcomputer can be selected.
Please refer to Fig. 2, the embodiment two that Fig. 2 gives the embodiment of the present invention to be provided measures the structured flowchart of the device of induced voltage; This device also comprises: waveform transform component 400, wherein,
Waveform transform component 400, be connected with described processor 300 with described point of pressure part 100 respectively, for to described point of pressure part 100 the voltage that divides carry out waveform conversion, and the result that waveform converts is sent to processor 300, wherein, described processor utilizes described result to calculate, and obtains the phase place of described voltage.
Wherein, loaded down with trivial details, consuming time many with induced electricity process owing to distinguishing net electricity in high-tension line, sometimes the problems such as clearly differentiation cannot even be made, therefore during the electrical verification of conducting transmission line interruption maintenance, electroscope sends electric alarm because of induced electricity will have influence on follow-up a series of activities like that, due to induced voltage be exceed certain limit after can cause danger to operating personnel;
Therefore be not that the existence of induced voltage each time all can not carry out follow-up work, and stoppage in transit circuit to produce induced electricity phenomenon still very common, the mode of artificial cognition extremely wastes time and energy.Particularly send someone line walking time, sometimes for the restriction of geographic factor (as mountain region, wetland etc.), the mode that only reliable walking is advanced is checked one by one, and this process needs one hour even more than two hours usually.Owing to lacking special instrument to measure induced voltage, time of at substantial of therefore just having to circuit of patrolling gets rid of suspicious factors one by one, has had a strong impact on normal operating efficiency.
Waveform transform component 400, is connected with described processor 300 with described point of pressure part 100 respectively, for described point of pressure part 100 the voltage that divides carry out waveform conversion, and the result that waveform converts is sent to processor 300.The analog voltage that point pressure part 100 obtains is carried out waveform conversion by waveform transform component 400 here, analog waveform and sinusoidal waveform or cosine waveform are transformed to digital waveform and square wave, and the square wave obtained after described conversion is passed to processor 300, processor 300 calculates the phase value that can obtain voltage through process, can judge that voltage is now induced voltage or network voltage by phase number.
Just solved the problem of above-mentioned differentiation net electricity and induced electricity difficulty by said method, the efficiency of line maintenance can be improved.
Please refer to Fig. 3, the embodiment three that Fig. 3 gives the embodiment of the present invention to be provided measures the structured flowchart of the device of induced voltage; This device also comprises: mutual induction of voltage parts 500, Hyblid Buffer Amplifier parts 600, wherein,
Mutual induction of voltage parts 500, are connected with described point of pressure part 100, for by point pressure part 100 described in mutual induction of voltage comparison the voltage that divides convert according to described mutual induction of voltage ratio;
Wherein, mutual induction of voltage parts 500 can be voltage transformer (VT), and wherein, voltage transformer (VT) is the transformer of a band iron core; Voltage transformer (VT) is primarily of first and second coil, iron core and insulation composition; When applying a voltage U 1 on a winding, in iron core, just producing a magnetic flux φ, according to the law of electromagnetic induction, then in Secondary Winding, just producing a secondary voltage U2; Change once or the number of turn of Secondary Winding, can produce different primary voltages and secondary voltage ratio, this just can form not voltage transformer (VT) on year-on-year basis.Voltage transformer (VT) converts high voltage to low-voltage in proportion, i.e. 100V, and voltage transformer (VT) primary side is connected on primary system, secondary side joint measurement instrument, relay protection etc.; (capacitance type potential transformer is widely used) of mainly electromagnetic type, separately has non electromagnetic, as electronic type, photo-electric.
Here, mutual induction of voltage parts 500 are connected with described point of pressure part 100, for by point pressure part described in mutual induction of voltage comparison the voltage that divides convert according to described mutual induction of voltage ratio, namely divide pressure part 100 that the induced voltage in hi-line is carried out the voltage that dividing potential drop obtains corresponding proportion, this voltage is again as the input end of mutual induction of voltage parts 500, by the coil of mutual induction of voltage parts 500 than obtaining the voltage after changing, here normally high voltage is converted to low-voltage in proportion, while the scope of voltage can be made can to meet service condition or the initial conditions of other devices.
Hyblid Buffer Amplifier parts 600, are connected with described analog to digital conversion means with described mutual induction of voltage parts 500 respectively, process according to described mutual induction of voltage described mutual induction of voltage parts 500 than the voltage after converting.
Wherein, the effect of buffer amplifier mainly improves load capacity and reduces load to the impact of signal source, has increase antijamming capability concurrently.As for whether having enlarging function to depend on actual needs, amplification buffering can be united two into one;
Have buffer amplifier in digital and analog circuit, the former mainly increases driving force or level conversion; Usually at the impact damper of A/D converter prime configuration, play drive amplification, now need to consider the problems such as impedance matching, charge injection, signal to noise ratio (S/N ratio) and output accuracy.
Here Hyblid Buffer Amplifier parts 600, are connected with described analog to digital conversion means with described mutual induction of voltage parts 500 respectively, process according to described mutual induction of voltage described mutual induction of voltage parts 500 than the voltage after converting; To make the voltage after processing can meet the input demand of analog to digital conversion means, improve the load capacity of the voltage obtained and reduce load to the impact of voltage, increasing antijamming capability.The input analog voltage that analog to digital conversion means is obtained is more accurate.The numerical value of the last measurement induced voltage being finally is more accurate.
Please refer to Fig. 4, the embodiment four that Fig. 4 gives the embodiment of the present invention to be provided measures the structured flowchart of the device of induced voltage;
Wherein, based on the structured flowchart of the device of the measurement induced voltage of Fig. 3, can see that Fig. 4 adds waveform transform component, such entirety, the input analog voltage that analog to digital conversion means and/or waveform transformation parts are obtained is more accurate.The numerical value of the last measurement induced voltage being finally is more accurate.Both the measurement of the voltage swing of voltage can have been carried out, again can the phase place of measuring voltage, not only can lead to superpotential numerical value and see that whether voltage value is now dangerous to operating personnel, but also can according to the numerical value of voltage-phase fast and convenient judge this voltage for net electricity or induced voltage, save the time, improve work efficiency.
Please refer to Fig. 5, the embodiment five that Fig. 5 gives the embodiment of the present invention to be provided measures the structured flowchart of the device of induced voltage; This device also comprises: range switching part 700, wherein,
Range switching part 700, is connected with described Hyblid Buffer Amplifier parts with described mutual induction of voltage parts respectively, for switching the range of point pressure part 100.
Wherein, because high-tension line has a lot of specification, so all different to each index request of required voltage divider, usual 10kV, 35kV, 110kV line standard is chosen respectively, under normal circumstances, the numerical value of the voltage that circuit transmits is higher, the requirement to all parts so in circuit will more be increased, such as insulating capacity wants better, therefore, if only use point pressure part of a specification, the detection of all high-tension lines is all used, 110kV line standard so should be selected to carry out the selection of the parameters of point pressure part, such cost is low, easy to carry, but to 10kV, 35kV circuit, measured signal power is too low, affect measurement result accuracy.Different size can also be adopted to carry out the design of point pressure part, and during test, choose point pressure part of corresponding grade by 10kV, 35kV, 110kV circuit insulating requirements separately, such measured signal power is suitable, and degree of accuracy is high, but cost is relatively high.
When we select the specification of three kinds of points of pressure parts time, so just need to arrange this range switching part, when for different high-tension lines, be transformed into by range switching part point pressure part that namely corresponding range uses corresponding coupling.
Please refer to Fig. 6, the embodiment six that Fig. 6 gives the embodiment of the present invention to be provided measures the structured flowchart of the device of induced voltage;
Wherein, based on the structured flowchart of the device of the measurement induced voltage of Fig. 5, can see that Fig. 6 adds waveform transform component, such entirety, such measured signal power is suitable, and degree of accuracy is high, improve the accuracy measured, both the measurement of the voltage swing of voltage can have been carried out, again can the phase place of measuring voltage, not only can lead to superpotential numerical value and see that whether voltage value is now dangerous to operating personnel, but also can according to the numerical value of voltage-phase fast and convenient judge this voltage for net electricity or induced voltage, save the time, improve work efficiency.
Optionally, the device of described measurement induced voltage also comprises: display unit, wherein,
Display unit is connected with described processor, for showing surveyed magnitude of voltage and/or phase value, easy to use, and can know display, preferably, LED LCDs can be selected to show.
Optionally, described point of pressure part can be connected with other parts by line voltage distribution input terminal, wherein, line voltage distribution input terminal can select screwing type input terminal, or plug-in type input terminal, wherein, screwing type input terminal, connect reliable, simultaneously visible, convenient inspection, but connect time-consuming, effort, and coupling part is outside exposed, causes when input voltage is higher and get an electric shock and electric discharge, have potential safety hazard; Screwing type input terminal, easy to connect, save time, laborsaving, insulate in whole charged coupling part and shell and other position, security connects well reliably; Therefore preferred, select plug-in type input terminal to connect.
By such connection, operating process can be made to facilitate, save time, laborsaving, insulate in whole charged coupling part and shell and other position, security connects well reliably.
Optionally, the guidance panel in the device of described measurement induced voltage can adopt good insulating, highly polished, nonabradable PC panel, and shell adopts light aluminium alloy, and inner support adopts epoxy resin board.
By the description of said apparatus, please refer to Fig. 7, Fig. 7 gives the structured flowchart measuring the device of induced voltage in the embodiment seven three-phase high-voltage circuit that the embodiment of the present invention provides; With reference to Fig. 7, can see the annexation of various piece, three-phase high-voltage line is through R
a, R
b, R
cthree-phase separate piezoresistance is connected to PT
a, PT
b, PT
cthree voltage transformer (VT) are connected into wye connection, neutral ground.Three PT secondary voltages, after range switching, Hyblid Buffer Amplifier, are often divided into two road signals: sample to processor CPU, for the amplitude of measuring voltage through analog to digital conversion means AD in a road mutually; Another road becomes square wave to CPU, for the phase place of measuring voltage after waveform conversion.Three electric pressure 10kV, 35kV, 110kV adopt different divider resistances, are switched by panel range switch simultaneously.By the display of table meter after the value of three-phase voltage, phase place are calculated by CPU, show separate can switching by switch.
By the device of above-mentioned measurement induced voltage, can distinguish the voltage of high-tension line, logical superpotential phase number judges that it is net electricity or induced voltage, increase work efficiency, save artificial determination time, again by the display of voltage value, the numerical value of the voltage of this hi-line can be obtained, thus can judge whether this voltage can produce danger to operating personnel; Point pressure part that namely corresponding range uses corresponding coupling is transformed into by range switching part; By plug-in type input terminal, operating process can be made to facilitate, save time, laborsaving, insulate in whole charged coupling part and shell and other position, security connects well reliably.
Embodiments provide and measure the device of induced voltage, the measurement can being undertaken induced voltage by said apparatus.
Be introduced the method for the measurement induced voltage that the embodiment of the present invention provides below, the method for measurement induced voltage described below can mutual corresponding reference with the device of above-described measurement induced voltage.
Please refer to Fig. 8, the process flow diagram of the method for the measurement induced voltage that Fig. 8 provides for the embodiment of the present invention; The method comprises:
Step s100, by a point pressure part, dividing potential drop is carried out to the induced voltage in hi-line, obtain analog voltage-dividing voltage;
Wherein, the voltage in hi-line is all alternating voltage, and what obtain after therefore carrying out voltage division processing by point pressure part remains alternating voltage, is analog voltage-dividing voltage.
Step s110, described analog voltage-dividing voltage is converted into corresponding digital voltage signal by analog to digital conversion means;
Wherein, analog voltage-dividing voltage is analog quantity, by analog to digital conversion means, is digital signal, i.e. digital voltage signal by analog voltage-dividing voltage transitions.
Step s120, by the magnitude of voltage that calculate induced voltage of described digital voltage signal by processor.
Wherein, described digital voltage signal is input in processor, by processor through calculating the magnitude of voltage of the induced voltage of described hi-line.
By said method, the numerical value of the induced voltage in hi-line can be measured, thus can prevent the safety of operating personnel is damaged.
Please refer to Fig. 9, the process flow diagram of the method for induced voltage phase place in the measurement induced voltage that Fig. 9 provides for the embodiment of the present invention; The method comprises:
Step s200, described analog voltage-dividing voltage is converted to square-wave signal by waveform transform component;
Wherein, analog voltage-dividing voltage is here divided into two paths of signals, carries out analog to digital conversion and obtain digital voltage signal in a road to analog to digital conversion means; Waveform conversion is carried out to waveform transform component in another road, and sine or cosine wave (CW) are transformed to square wave;
Step s210, by the phase value that calculate induced voltage of described square-wave signal by processor.
Wherein, by described square-wave signal input processor, the phase value of induced voltage is calculated by processor.
By said method, the phase place of voltage in hi-line can be obtained, thus net electricity and induced voltage can be distinguished efficiently, save the time, improve efficiency.
Optionally, described hi-line comprises: three-phase high-voltage line, wherein,
Described by dividing a pressure part to carry out dividing potential drop to the induced voltage in hi-line, obtain analog voltage-dividing voltage method and comprise:
Utilize a point of pressure part to carry out dividing potential drop successively to the induced voltage in three-phase high-voltage line, obtain analog voltage-dividing voltage;
Wherein, utilize single electric resistance partial pressure parts to come measuring circuit A, B, C three-phase voltage successively, such cost is low, portable, but three-phase line magnitude of voltage can only be measured successively, cannot measuring circuit phase place, but when only needing the measurement carrying out voltage value, can select, and cost is low.
Or utilize three points of pressure parts to carry out dividing potential drop to the induced voltage in three-phase high-voltage line simultaneously, obtain analog voltage-dividing voltage.
Wherein, three resitstance voltage dividers are utilized to come simultaneously measuring circuit A, B, C three-phase voltage, can measuring circuit magnitude of voltage and phase place simultaneously, but needing three resitstance voltage dividers, cost increases relatively; But save time, and namely can obtain magnitude of voltage and also can obtain phase value.
Optionally, described three-phase high-voltage line comprises: the three-phase high-voltage line of different size, wherein,
Described by dividing a pressure part to carry out dividing potential drop to the voltage in hi-line, obtain analog voltage-dividing voltage method and comprise:
Utilize a kind of specification to divide pressure part to carry out dividing potential drop to the induced voltage in three-phase high-voltage line, obtain analog voltage-dividing voltage;
Wherein, voltage divider resistance is chosen with the insulating requirements of 110kV circuit.Cost is low, easy to carry.But for 10kV, 35kV circuit, measured signal power is too low, affects measurement result accuracy.
Or utilize different size to divide pressure part to carry out dividing potential drop to the induced voltage in corresponding three-phase high-voltage line, obtain analog voltage-dividing voltage.
Wherein, need three kinds of voltage divider specifications, during test, choose the voltage divider of corresponding grade by 10kV, 35kV, 110kV circuit insulating requirements separately.Measured signal power is suitable.But cost is relatively high.
Based on technique scheme, the method for measurement induced voltage provided by the present invention, comprises and carries out dividing potential drop by a point pressure part to the voltage in hi-line, obtain analog voltage-dividing voltage; Described analog voltage-dividing voltage is converted into corresponding digital voltage signal by analog to digital conversion means; By the magnitude of voltage that calculate induced voltage of described digital voltage signal by processor; The induced voltage of hi-line can be carried out dividing potential drop in proportion by a point pressure part, utilize small voltage to measure, the numerical value of induced voltage in high-tension line is obtained by the value of small voltage, by described point of pressure part the voltage that divides pass to analog to digital conversion means, pass through analog to digital conversion, obtain corresponding digital voltage signal, described digital voltage signal is passed to processor, processor carry out calculating corresponding point pressure part the magnitude of voltage of voltage that divides, obtained the magnitude of voltage of the induced voltage in hi-line by voltage divider principle.By technique scheme, the size of the magnitude of voltage of induced voltage can be measured, be convenient for people to judge according to the size of magnitude of voltage, thus follow-up work can be carried out easily, also ensure the life security of operating personnel.
Embodiments provide and measure the method for induced voltage, the measurement can being undertaken induced voltage by said method.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above the device and method of measurement induced voltage provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. measure a device for induced voltage, it is characterized in that, this device comprises:
Be connected with hi-line, the voltage in described hi-line carried out to point pressure part of dividing potential drop;
Be connected with described point of pressure part, to described point of pressure part the voltage that divides carry out analog-to-digital analog to digital conversion means;
Be connected with described analog to digital conversion means, calculate the processor of induced voltage.
2. the device measuring induced voltage as claimed in claim 1, it is characterized in that, this device also comprises:
Be connected with described processor with described point of pressure part respectively, to described point of pressure part the voltage that divides carry out waveform conversion, and the result that waveform converts is sent to the waveform transform component of processor, wherein, described processor utilizes described result to calculate, and obtains the phase place of described voltage.
3. the device measuring induced voltage as claimed in claim 1, it is characterized in that, this device also comprises:
Be connected with described point of pressure part, by point pressure part described in mutual induction of voltage comparison the voltage that divides according to described mutual induction of voltage than the mutual induction of voltage parts carrying out converting;
Be connected with described analog to digital conversion means with described mutual induction of voltage parts respectively, to the Hyblid Buffer Amplifier parts that described mutual induction of voltage parts process than the voltage after converting according to described mutual induction of voltage.
4. the device measuring induced voltage as claimed in claim 3, it is characterized in that, this device also comprises:
The range switching part be connected with described Hyblid Buffer Amplifier parts with described mutual induction of voltage parts respectively.
5. the device measuring induced voltage as claimed in claim 1, it is characterized in that, this device also comprises:
Be connected with described processor, the display unit of display measurement data.
6. the device measuring induced voltage as claimed in claim 1, it is characterized in that, described point of pressure part comprises: resitstance voltage divider.
7. measure a method for induced voltage, it is characterized in that, the method comprises:
By a point pressure part, dividing potential drop is carried out to the voltage in hi-line, obtain analog voltage-dividing voltage;
Described analog voltage-dividing voltage is converted into corresponding digital voltage signal by analog to digital conversion means;
By the magnitude of voltage that calculate induced voltage of described digital voltage signal by processor.
8. the method measuring induced voltage as claimed in claim 7, it is characterized in that, the method also comprises:
Described analog voltage-dividing voltage is converted to square-wave signal by waveform transform component;
By the phase value that calculate induced voltage of described square-wave signal by processor.
9. the method measuring induced voltage as claimed in claim 7, it is characterized in that, described hi-line comprises: three-phase high-voltage line, wherein,
Described by dividing a pressure part to carry out dividing potential drop to the voltage in hi-line, obtain analog voltage-dividing voltage method and comprise:
Utilize a point of pressure part to carry out dividing potential drop successively to the voltage in three-phase high-voltage line, obtain analog voltage-dividing voltage;
Or utilize three points of pressure parts to carry out dividing potential drop to the voltage in three-phase high-voltage line simultaneously, obtain analog voltage-dividing voltage.
10. the method measuring induced voltage as claimed in claim 7, it is characterized in that, described hi-line comprises: the three-phase high-voltage line of different size, wherein,
Described by dividing a pressure part to carry out dividing potential drop to the voltage in hi-line, obtain analog voltage-dividing voltage method and comprise:
Utilize a kind of specification to divide pressure part to carry out dividing potential drop to the voltage in three-phase high-voltage line, obtain analog voltage-dividing voltage;
Or utilize different size to divide pressure part to carry out dividing potential drop to the voltage in corresponding three-phase high-voltage line, obtain analog voltage-dividing voltage.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107727920A (en) * | 2017-09-18 | 2018-02-23 | 国网浙江省电力公司嘉兴供电公司 | A kind of induced voltage control system and its method |
| CN109188306A (en) * | 2018-07-18 | 2019-01-11 | 深圳市华星光电半导体显示技术有限公司 | Detect the circuit and method of the input voltage rate of climb |
| CN109606424A (en) * | 2018-12-27 | 2019-04-12 | 合肥工业大学 | A kind of track circuit electronic receiver |
| CN110174575A (en) * | 2019-06-20 | 2019-08-27 | 中铁第一勘察设计院集团有限公司 | Power supply through line induced electricity integrated test system and method along electric railway |
| CN113447698A (en) * | 2021-06-11 | 2021-09-28 | 南方电网数字电网研究院有限公司 | Voltage measurement circuit, method and apparatus |
| CN115902372A (en) * | 2022-10-20 | 2023-04-04 | 广州商学院 | Direct-current voltage measuring method and device, electronic equipment and storage medium |
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- 2014-11-07 CN CN201410623963.7A patent/CN104297559A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727920A (en) * | 2017-09-18 | 2018-02-23 | 国网浙江省电力公司嘉兴供电公司 | A kind of induced voltage control system and its method |
| CN109188306A (en) * | 2018-07-18 | 2019-01-11 | 深圳市华星光电半导体显示技术有限公司 | Detect the circuit and method of the input voltage rate of climb |
| CN109606424A (en) * | 2018-12-27 | 2019-04-12 | 合肥工业大学 | A kind of track circuit electronic receiver |
| CN110174575A (en) * | 2019-06-20 | 2019-08-27 | 中铁第一勘察设计院集团有限公司 | Power supply through line induced electricity integrated test system and method along electric railway |
| CN110174575B (en) * | 2019-06-20 | 2020-04-03 | 中铁第一勘察设计院集团有限公司 | Comprehensive test system and method for induced electricity of power through line along electrified railway |
| CN113447698A (en) * | 2021-06-11 | 2021-09-28 | 南方电网数字电网研究院有限公司 | Voltage measurement circuit, method and apparatus |
| CN113447698B (en) * | 2021-06-11 | 2022-03-08 | 南方电网数字电网研究院有限公司 | Voltage measurement circuit, method and apparatus |
| CN115902372A (en) * | 2022-10-20 | 2023-04-04 | 广州商学院 | Direct-current voltage measuring method and device, electronic equipment and storage medium |
| CN115902372B (en) * | 2022-10-20 | 2023-11-07 | 广州商学院 | Direct-current voltage measurement method and device, electronic equipment and storage medium |
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