CN101615501B - Voltage and current integral sampling device - Google Patents
Voltage and current integral sampling device Download PDFInfo
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- CN101615501B CN101615501B CN200810125009XA CN200810125009A CN101615501B CN 101615501 B CN101615501 B CN 101615501B CN 200810125009X A CN200810125009X A CN 200810125009XA CN 200810125009 A CN200810125009 A CN 200810125009A CN 101615501 B CN101615501 B CN 101615501B
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Abstract
The invention relates to a voltage and current integral sampling device which comprises a box body. A current transformer is arranged in the box body, a phase line passes through the center of the current transformer, and the current transformer outputs a current signal through a current signal output terminal. A direct voltage sampling unit is also arranged in the box body and comprises a voltage acquisition subunit and a voltage/frequency conversion subunit, wherein the voltage acquisition subunit is arranged on the phase line and used for acquiring a real-time voltage signal and converting the real-time voltage signal into a first voltage sampling signal; and the voltage/frequency conversion subunit is connected with the voltage acquisition subunit and also can be connected with the current transformer simultaneously to convert the voltage sampling signal into a corresponding first frequency signal for outputting.
Description
Technical field
What the present invention relates to is a kind of power voltage line, current sampling device, particularly be a kind ofly directly to obtain voltage signal from power line, obtain the high stability voltage transformer that characterizes magnitude of voltage with frequency by the voltage/frequency conversion.
Background technology
Power department is in order to realize management and the monitoring to power line electric power situation, often real-time voltage value and current value on this power line are obtained in the element task that will do exactly, prior art is to adopt independently current transformer and voltage transformer to this, obtains magnitude of voltage and current value respectively; But maintain a certain distance separately when mounted, prevent mutual electromagnetic interference, simultaneously because as power consumption equipment, from the angle of the conservation of energy, still there is certain power consumption in instrument transformer self; Wherein, described voltage transformer is actually a transformer that band is unshakable in one's determination.Generally be applied to the high pressure field, it mainly is made up of first and second coil, iron core and insulation.When on a winding, applying a voltage U 1, in iron core, just produce a magnetic flux
According to the law of electromagnetic induction, then in secondary winding, just produce 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 on year-on-year basis.Voltage transformer converts high voltage to low-voltage in proportion, i.e. 100V, and the voltage transformer primary side is connected on primary system, secondary side joint measuring instrument, relaying protection etc.; Mainly be electromagnetic type, other has non electromagnetic, as electronic type, photoelectric type.The ruuning situation of voltage transformer is equivalent to the transformer of 2 side open circuits, and its load is the bigger measuring instrument of impedance.The pressure drop that secondary current produces and the existence of exciting current are the sources of voltage transformer error.The voltage transformer secondary can not be taken over many loads; And require unsaturated (0.6-0.8T) unshakable in one's determination.Multinomial patent about high-voltage mutual inductor is disclosed in the Chinese patent, but because it all is based on the basic theory of transformer, the improvement of carrying out, therefore its be can't the existing instrument transformer of radical change defective, produce the defective of bigger error along with the change of material, craft precision and environment as: complex process, the bulky and accuracy rate magnitude of voltage that reflects, when being used in combination with described current transformer, then volume is more huge simultaneously.
In view of above-mentioned defective, this case creator is through research and experiment obtain the present invention finally for a long time.
Summary of the invention
The objective of the invention is to, a kind of voltage, current integral sampling device are provided, in order to overcome above-mentioned defective.
For achieving the above object, the technical solution used in the present invention is, a kind of voltage, current integral sampling device are provided, it comprises: a box body, be provided with a current transformer in the described box body, described current transformer center has a phase line to pass, and described current transformer is by the sub-output current signal of a current signal output end; Also be provided with in described box body and access voltage cell always, it comprises: a voltage acquisition subelement, and it is arranged on the described phase line, in order to obtain real-time voltage signal and to transfer first voltage sampling signal to;
One voltage, it is connected with described voltage acquisition subelement, and described voltage sampling signal is converted to corresponding first frequency signal output;
Wherein, described voltage acquisition subelement comprises: a voltage sample assembly, and it directly gathers real-time voltage signal from described phase line;
One voltage signal processing circuit, it carries out first voltage sampling signal that rectification is converted to direct current with described real-time voltage signal;
And power circuit, it carries out voltage stabilizing, filtering with described voltage and converts supply voltage output to;
Wherein, described voltage sample assembly is the mechanical structure assembly, and it comprises:
One conduction sampling part, it is an electric conducting material, directly contacting metal power line or see through insulated hull and directly contact the electric power core obtains voltage signal real-time on the power line;
One sampling fixture makes described conduction sampling part be connected firmly with described power line.
Wherein, when described power line had insulated hull, described conduction sampling part was the pin dentalation, and it thrusts described power line and contacts with the electric power core.
Wherein, described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: first voltage-stabiliser tube that one first resistance, one is connected with it, one with described first resistance rectifier bridge in parallel, the two ends of wherein said first resistance obtain is described real-time voltage signal, and described rectifier bridge is exported described first voltage sampling signal;
Wherein, described power circuit comprises: one the 4th resistance, and it is connected in order to step-down with described cathode rectifier;
Second voltage-stabiliser tube of one parallel connection, first electric capacity and second electric capacity are in order to carry out voltage stabilizing, the output of filtering formation stable power;
Wherein, described voltage comprises:
One integrating circuit, its magnitude of voltage to described first voltage sampling signal carry out integral processing and are converted to first current value that is directly proportional with described magnitude of voltage respectively;
One voltage/frequency change-over circuit, it receives described current signal and exports the described first frequency signal that is directly proportional with described magnitude of voltage;
Wherein, described integrating circuit comprises:
One first integrator, its inverting input obtain described first voltage sampling signal, and described power circuit provides operating voltage for it.
Wherein, also comprise:
The 5th resistance of one parallel connection and the 3rd electric capacity, the one parallel connected end is connected with the in-phase input end of described first integrator respectively, other end ground connection;
And the 5th electric capacity of a series connection and second diode prevent that as feedback the output of described second integral device from signal drift, the plus earth of wherein said second diode taking place; Described second diode links to each other with described first integrator output with the 5th electric capacity tie point;
Wherein, described voltage/frequency change-over circuit comprises: a voltage/frequency conversion chip, and its input is in order to obtain described current signal, and described power circuit provides operating voltage for it;
One reference voltage generating circuit, it comprises: one first triode, its collector electrode links to each other with described power circuit, and its base stage links to each other with described voltage/frequency conversion chip reference voltage output end; The 6th resistance and the 7th resistance of one series connection, the one end links to each other with the base stage of described first triode, other end ground connection, its series connection point links to each other with the emitter of described first triode;
The present invention provides a kind of voltage, current integral sampling device again, and it comprises: a box body, be provided with a current transformer unit in the described box body, and described current transformer unit center has a phase line to pass, and exports one second voltage sampling signal; Also be provided with in described box body and access voltage cell always, it comprises: a voltage acquisition subelement, and itself and described being arranged on the described phase line are in order to obtain real-time voltage signal and to transfer first voltage sampling signal to;
One voltage, it is connected with described voltage acquisition subelement and current transformer unit respectively, with described first voltage sampling signal and described second voltage sampling signal; Be converted to respectively and each self-corresponding first frequency signal and the output of second frequency signal;
Wherein, described voltage acquisition subelement comprises: a voltage sample assembly, and it directly collects real-time voltage signal from described phase line;
One voltage signal processing circuit, it carries out first voltage sampling signal that rectification is converted to direct current with described real-time voltage signal;
And power circuit, it carries out voltage stabilizing, filtering with described voltage and converts supply voltage output to.
Wherein, described voltage sample assembly is the mechanical structure assembly, and it comprises:
One conduction sampling part, it directly contacts the electric power core by direct contacting metal power line or through insulated hull, obtains voltage signal real-time on the phase line;
One sampling fixture makes described conduction sampling part be connected firmly with described power line.
Wherein, when described power line had insulated hull, described conduction sampling part was the pin dentalation, and it thrusts described power line and contacts with the electric power core;
Wherein, described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: first voltage-stabiliser tube that one first resistance, one is connected with it, one with described first resistance rectifier bridge in parallel, the two ends of wherein said first resistance obtain is described real-time voltage signal, and described rectifier bridge is exported described first voltage sampling signal;
Wherein, described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: first resistance of at least two groups series connection, one with described one of them first resistance rectifier bridge in parallel, described rectifier bridge is exported described first voltage sampling signal.
Wherein, described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: first resistance that at least two groups are parallel with one another and electric capacity, one and one of them organize the rectifier bridge that described first resistance and electric capacity are in parallel, described rectifier bridge is exported described first voltage sampling signal.
Wherein, described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: the sampling capacitor of at least two groups series connection, one thinks rectifier bridge in parallel with one of them sampling capacitor, and described rectifier bridge is exported described first voltage sampling signal.
Wherein, described power circuit comprises: one the 4th resistance, and it is connected in order to step-down with described cathode rectifier;
Second voltage-stabiliser tube of one parallel connection, first electric capacity and second electric capacity are in order to carry out voltage stabilizing, the output of filtering formation stable power.
Wherein, described voltage comprises:
One integrating circuit, its magnitude of voltage to described first voltage sampling signal and described second voltage sampling signal carry out integral processing and are converted to first current value and second current value that is directly proportional with described magnitude of voltage respectively;
One voltage/frequency change-over circuit, it receives described current signal and exports described first frequency signal and the second frequency signal that is directly proportional with described magnitude of voltage;
Wherein, described integrating circuit comprises:
One first integrator, its inverting input obtain described first voltage sampling signal, and described power circuit provides operating voltage for it;
One second integral device, its inverting input obtain described second voltage sampling signal, and described power circuit provides operating voltage for it;
Wherein, also comprise:
The 5th resistance of one parallel connection and the 3rd electric capacity, one parallel connected end are connected with the in-phase input end of described first integrator with the second integral device respectively, other end ground connection;
The 4th electric capacity of one series connection, first diode prevent that as feedback described first integrator output from signal drift taking place;
And the 5th electric capacity of a series connection and second diode prevent that as feedback the output of described second integral device from signal drift taking place, the wherein said first diode also ground connection of connecting with the anode of described second diode; Described first diode links to each other with described first integrator output with the 4th electric capacity tie point, and described second diode links to each other with described second integral device output with the 5th electric capacity tie point;
Wherein, described voltage/frequency change-over circuit comprises: a voltage/frequency conversion chip, and its input is in order to obtain described current signal, and described power circuit provides operating voltage for it;
One reference voltage generating circuit, it comprises: one first triode, its collector electrode links to each other with described power circuit, and its base stage links to each other with described voltage/frequency conversion chip reference voltage output end; The 6th resistance and the 7th resistance of one series connection, the one end links to each other with the base stage of described first triode, other end ground connection, its series connection point links to each other with the Launch Right of described first triode;
Wherein, also comprise: a photoelectricity separaant unit, it is connected with the signal output part of described voltage, and described photoelectricity separaant unit is two photoelectrical couplers.
Beneficial effect of the present invention compared with the prior art is that volume is little, magnitude of voltage/current value certainty of measurement height.
Description of drawings
Fig. 1 is the mechanical structure schematic diagram of the preferred embodiment one of voltage of the present invention, current integral sampling device;
Fig. 2 is the mechanical structure schematic diagram of voltage sample assembly in the preferred embodiment one of voltage of the present invention, current integral sampling device;
Fig. 3 is the electrical block diagram of the preferred embodiment one of voltage of the present invention, current integral sampling device;
Fig. 4 is the mechanical structure schematic diagram of the preferred embodiment two of voltage of the present invention, current integral sampling device;
Fig. 5 is the mechanical structure schematic diagram of voltage sample assembly in the preferred embodiment two of voltage of the present invention, current integral sampling device;
Fig. 6 is the electrical block diagram of the preferred embodiment two of voltage of the present invention, current integral sampling device;
Fig. 7 is the electrical block diagram of the preferred embodiment three of voltage of the present invention, current integral sampling device;
Fig. 8 is the electrical block diagram of the preferred embodiment four of voltage of the present invention, current integral sampling device;
Fig. 9 is the electrical block diagram of the preferred embodiment five of voltage of the present invention, current integral sampling device.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
See also shown in Figure 1ly, it is the mechanical structure schematic diagram of the preferred embodiment one of voltage of the present invention, current integral sampling device; Described voltage, current integral sampling device comprise: a box body 1, it adopts the insulation fire proofing to make, be provided with a current transformer unit in the described box body 1, described current transformer unit comprises: a current transformer 2 and current signal output end 21, described current transformer 2 centers have a phase line 0 to pass, and the current signal that described current transformer 2 produces is through being arranged on current signal output end 21 outputs on the described box body 1; Also be provided with in described box body 1 and access voltage cell always, it comprises: a voltage acquisition subelement 3, and it is arranged on the described phase line 0, in order to obtain real-time voltage signal and to transfer first voltage sampling signal to; Also comprise a circuit substrate 32, it is provided with a voltage, it is connected with described voltage acquisition subelement 3, described first voltage sampling signal is converted to corresponding first frequency signal output, and by being arranged on voltage signal output end 31 outputs on the described box body 1.Described voltage acquisition subelement 3 comprises: a voltage sample assembly, and it directly gathers real-time voltage signal from described phase line; One voltage signal processing circuit, it carries out rectification with described real-time voltage signal handles, and is converted to first voltage sampling signal of direct current; And a power circuit, its with described voltage carry out voltage stabilizing, filtering converts supply voltage output to.
See also shown in Figure 2ly, it is the mechanical structure schematic diagram of voltage sample assembly in the preferred embodiment one of voltage of the present invention, current integral sampling device, and described voltage sample assembly is the mechanical structure assembly, and it comprises:
One conduction sampling part 33, it is that an electric conducting material makes, and is under the situation of metal bare wire in described phase line, directly contacting metal phase line (not shown); Have when described phase line under the situation of insulated hull, see through insulated hull and directly contact the phase core, obtain voltage signal real-time on the phase line; It is the design feature that Fig. 2 embodied, and described conduction sampling part 33 has the pin dentalation, so can acupuncture penetrate described insulated hull.
One sampling fixture, it comprises: a fixed block 34 and a bolt 35, be threaded in the described box body 1 by described bolt 35, described bolt 35 crowns lean against on the described fixed block 34, thereby make more firm that described conduction sampling part 33 contact with phase line, can achieve the above object and the example of thought does not limit to the structure that only relies on described bolt 35 and fixed block 34 compositions.
See also shown in Figure 3ly, it is the electrical block diagram of the preferred embodiment one of voltage of the present invention, current integral sampling device; Described circuit substrate is provided with the main circuit function part of the present invention, and it comprises: described voltage signal processing circuit, power circuit and described voltage, wherein,
Described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: one first resistance R 1, first a voltage-stabiliser tube DW who connects with it, the one rectifier bridge D1-D4 in parallel with described first resistance, the two ends of wherein said first resistance R 1 obtain is described real-time voltage signal, and described rectifier bridge D1-D4 exports described first voltage sampling signal;
Described power circuit comprises: one the 4th resistance R 14, and it is connected in order to step-down with described rectifier bridge D1-D4 is anodal; The second voltage-stabiliser tube DW1 of one parallel connection, first capacitor C 1 and second capacitor C 2 are in order to carry out voltage stabilizing, the output of filtering formation stable power voltage;
Described voltage comprises:
One integrating circuit, it comprises: a first integrator IC1, its inverting input obtains described first voltage sampling signal by resistance R 2, described power circuit provides operating voltage for it, realization is carried out integral processing to the magnitude of voltage of described first voltage sampling signal, is converted to first current value that is directly proportional with described magnitude of voltage respectively; The 5th resistance R 3 of one parallel connection and the 3rd capacitor C 4, the one parallel connected end is connected with the in-phase input end of described first integrator IC1 respectively, other end ground connection;
And the 5th capacitor C 5 of a series connection and the second diode D5 prevent that as feedback the output of described first integrator from signal drift, the plus earth of the wherein said second diode D5 taking place; The described second diode D5 links to each other with described first integrator IC1 output by a resistance R 4 with the 5th capacitor C 5 tie points;
One voltage/frequency change-over circuit, it receives described current signal and exports the described first frequency signal that is directly proportional with described magnitude of voltage; It comprises: a voltage/frequency conversion chip IC2, and its input is in order to obtain described current signal, and described power circuit provides operating voltage for it;
One reference voltage generating circuit, it comprises: one first triode, its collector electrode links to each other with described power circuit, and its base stage links to each other with described voltage/frequency conversion chip IC2 reference voltage output end CUAREN; The 6th resistance R 8 and the 7th resistance R 9 of one series connection, the one end links to each other with the base stage of described first triode, other end ground connection, its series connection point links to each other with the emitter of described first triode;
One photoelectric isolating device, its with the output of described voltage/frequency conversion chip IC2 mutually FOUT connect, frequency signal is converted to the signal of telecommunication, the photoelectrical coupler IC3 of Cai Yonging here, the anti-interference long-distance transmissions of being convenient to.
Above-mentioned is first thinking of the present invention, it is to adopt same sample devices, simultaneously on a phase line, obtain the voltage and current signal, in order to prevent the electromagnetic interference of voltage transformer between the current transformer generally, here the mode that has adopted direct contact to obtain to the voltage signal sampling mode, adopted the voltage/frequency conversion simultaneously, the mode of voltage with frequency signal spread out of, improved precision to the magnitude of voltage metering, reduced the power consumption of existing voltage transformer self, still adopt for the sampling of described current signal and obtain analog signal from described current transformer and directly export this moment.
Below the second embodiment of the present invention is described, see also shown in Figure 4ly and shown in Figure 5, it is respectively the mechanical structure schematic diagram of the preferred embodiment two of voltage of the present invention, current integral sampling device, and the mechanical structure schematic diagram of voltage sample assembly; The difference of itself and the foregoing description one mechanical structure schematic diagram is, the analog signal of described current transformer instrument transformer output also is linked into the voltage in the described direct power taking pressure unit, with the analog sample signal that obtains of described first voltage sampling signal and described current transformer unit, be converted to respectively and each self-corresponding first frequency signal and the output of second frequency signal; What embody from structure is exactly that two unit all are connected with described circuit substrate 32, described current signal output end to and voltage signal output end 31 obtain the value of representative voltage separately after the processing and the frequency signal of current value from described circuit substrate.
See also shown in Figure 6ly, it is the electrical block diagram of the preferred embodiment two of voltage of the present invention, current integral sampling device.Described circuit substrate is provided with the main functional circuit part of this embodiment, it comprises: described voltage signal processing circuit, power circuit and described voltage, wherein, described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: one first resistance R 1, the one first voltage-stabiliser tube DW that connects with it, one with described first resistance R 1 rectifier bridge D1-D4 in parallel, the two ends of wherein said first resistance R 1 obtain is described real-time voltage signal, and described rectifier bridge D1-D4 exports described first voltage sampling signal;
One second potential circuit, it is handled the current value that described current transformer TA obtains, it also comprises: be parallel with resistance R 17 at reaching current transformer TA output, and the capacitor C 5 and the diode D7 of series connection also be connected in parallel on described current transformer TA output, current signal conversion is output into one second voltage sampling signal.
Described power circuit comprises: one the 4th resistance R 18, and it is connected in order to step-down with described rectifier bridge D1-D4 is anodal; The second voltage-stabiliser tube DW1 of one parallel connection, first capacitor C 1 and second capacitor C 2 are in order to carry out voltage stabilizing, the output of filtering formation stable power voltage.
Described integrating circuit comprises: a first integrator, its inverting input is connected with the positive pole of described rectifier bridge D1-D4 by a resistance R 2, obtain described first voltage sampling signal, the output of described power circuit E is connected with the VCC of described integrating circuit end, for it provides operating voltage;
One second integral device, its inverting input is connected by the output of resistance R 19 with described rectification sample circuit, obtains described second voltage sampling signal; Also comprise: a delay circuit, described delay circuit comprise the 5th resistance R 3 and the 3rd capacitor C 4 of a pair of parallel connection, and the one parallel connected end is connected with the in-phase end of described first integrator with described second integral device, its another parallel connected end ground connection.
Also comprise: a feedback circuit, it comprises: the 4th capacitor C 3 of a series connection, the first diode D5 prevent that as feedback described first integrator output from signal drift taking place;
And the 5th capacitor C 6 of a series connection and the second diode D6 prevent that as feedback the output of described second integral device from signal drift taking place, the wherein said first diode D5 also ground connection of connecting with the anode of the described second diode D6; The described first diode D5 links to each other with described first integrator output with the 4th capacitor C 3 tie points, and the described second diode D6 links to each other with described second integral device output with the 5th capacitor C 6 tie points;
Described voltage/frequency change-over circuit 32 comprises: a voltage/frequency conversion chip IC2, it has at least two input INPUT1, INPUT2, be connected with the output of described first integrator and the output of second integral device respectively by resistance R 4, R11, in order to obtain described first current signal and second current signal, described power circuit provides operating voltage for it;
Also comprise: a reference voltage generating circuit, it comprises: one first triode Q, its collector electrode links to each other with described power circuit, and its base stage links to each other with described voltage/frequency conversion chip IC2 reference voltage output end CUAREN; The 6th resistance R 16 and the 7th resistance R 14 of one series connection, the one end links to each other with the base stage of the described first triode Q, other end ground connection, its series connection point links to each other with the emitter of the described first triode Q.
Also comprise: a photoelectricity separaant unit, it is connected with signal output part Fout1, the Fout2 of described voltage/frequency conversion chip IC2 respectively, described photoelectricity separaant unit is two photoelectrical coupler IC3, IC4, thereby the first frequency signal of representative voltage is exported with the second frequency signal of representing electric current.
See also shown in Figure 7ly, it is the electrical block diagram of the preferred embodiment three of voltage of the present invention, current integral sampling device; The difference of itself and embodiment two is, comprise for first potential circuit: first resistance (adopting three resistance R a, Rb, Rc to connect mutually here) of at least two groups series connection, one with described one of them first resistance (resistance R b) rectifier bridge D1-D4 in parallel, the two ends of the wherein said first resistance R b obtain is described real-time voltage signal, and described rectifier bridge D1-D4 exports described first voltage sampling signal.
See also shown in Figure 8ly, it is the electrical block diagram of the preferred embodiment four of voltage of the present invention, current integral sampling device; The difference of itself and embodiment two is, comprise for first potential circuit: first resistance that at least two groups are parallel with one another and electric capacity (adopting three groups of resistance R a, Rb, Rc to be in parallel with capacitor C a, Cb, Cc respectively here), one and one of them organize the rectifier bridge D1-D4 that the described first resistance R b and electric capacity Rc are in parallel, the two ends of wherein said first resistance R b and capacitor C b obtain is described real-time voltage signal, and described rectifier bridge is exported described first voltage sampling signal.
See also shown in Figure 9ly, it is the electrical block diagram of the preferred embodiment five of voltage of the present invention, current integral sampling device.The difference of itself and embodiment two is, comprise for first potential circuit: the sampling capacitor (adopting three groups of capacitor C a, Cb, Cc to be in series here) of at least two groups series connection, the one rectifier bridge D1-D4 that is in parallel with one of them sampling capacitor Cb, the two ends of wherein said sampling capacitance Cb obtain is described real-time voltage signal, and described rectifier bridge D1-D4 exports described first voltage sampling signal.
And among above-mentioned Fig. 7-Fig. 9 its is all identical with circuit, the first in fact above-mentioned potential circuit also can with the first potential circuit mutual alternative among the embodiment one among described Fig. 3, just repeated no more here.
The above only is preferred embodiment of the present invention, only is illustrative for the purpose of the present invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that claim of the present invention limited, revise, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (26)
1. a voltage, current integral sampling device, it comprises: a box body, be provided with a current transformer in the described box body, described current transformer center has a phase line to pass, and described current transformer is by the sub-output current signal of a current signal output end; It is characterized in that also be provided with and access voltage cell always, it comprises: a voltage acquisition subelement in described box body; It is arranged on the described phase line, in order to obtain real-time voltage signal and to transfer first voltage sampling signal to;
One voltage, it is connected with described voltage acquisition subelement, and described voltage sampling signal is converted to corresponding first frequency signal output; Described voltage comprises:
One integrating circuit, its magnitude of voltage to described first voltage sampling signal carry out integral processing and are converted to first current value that is directly proportional with described magnitude of voltage;
One voltage/frequency change-over circuit, it obtains described first current value and exports the described first frequency signal that is directly proportional with described magnitude of voltage.
2. voltage according to claim 1, current integral sampling device is characterized in that, described voltage acquisition subelement comprises: a voltage sample assembly, and it directly gathers real-time voltage signal from described phase line;
One voltage signal processing circuit, it carries out first voltage sampling signal that rectification is converted to direct current with described real-time voltage signal;
And power circuit, it carries out voltage stabilizing, filtering with described first voltage sampling signal and converts supply voltage output to.
3. voltage according to claim 2, current integral sampling device is characterized in that, described voltage sample assembly is the mechanical structure assembly, and it comprises:
One conduction sampling part, its direct contacting metal power line or see through insulated hull and directly contact the electric power core obtains voltage signal real-time on the power line;
One sampling fixture makes described conduction sampling part be connected firmly with described power line.
4. voltage according to claim 3, current integral sampling device is characterized in that: when described power line had insulated hull, described conduction sampling part was the pin dentalation, and it thrusts described power line and contacts with the electric power core.
5. voltage according to claim 2, current integral sampling device, it is characterized in that: described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: first voltage-stabiliser tube that one first resistance, one is connected with it, one with described first resistance rectifier bridge in parallel, the two ends of wherein said first resistance obtain is described real-time voltage signal, and described rectifier bridge is exported described first voltage sampling signal.
6. voltage according to claim 5, current integral sampling device is characterized in that: described power circuit comprises: one the 4th resistance, and it is connected in order to step-down with described cathode rectifier;
Second voltage-stabiliser tube of one parallel connection, first electric capacity and second electric capacity are in order to carry out voltage stabilizing, the output of filtering formation stable power.
7. voltage according to claim 2, current integral sampling device, it is characterized in that: described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: first resistance of at least two groups series connection, one with described one of them first resistance rectifier bridge in parallel, described rectifier bridge is exported described first voltage sampling signal.
8. voltage according to claim 2, current integral sampling device, it is characterized in that: described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: first resistance that at least two groups are parallel with one another and electric capacity, one and one of them organize the rectifier bridge that described first resistance and electric capacity are in parallel, described rectifier bridge is exported described first voltage sampling signal.
9. voltage according to claim 2, current integral sampling device, it is characterized in that: described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: the sampling capacitor of at least two groups series connection, one rectifier bridge that is in parallel with one of them sampling capacitor, described rectifier bridge is exported described first voltage sampling signal.
10. voltage according to claim 2, current integral sampling device is characterized in that: described integrating circuit comprises:
One first integrator, its inverting input obtain described first voltage sampling signal, and described power circuit provides operating voltage for it.
11. voltage according to claim 10, current integral sampling device is characterized in that: also comprise:
The 5th resistance of one parallel connection and the 3rd electric capacity, one parallel connected end are connected with the in-phase input end of a second integral device respectively, other end ground connection;
And the 5th electric capacity of a series connection and second diode prevent that as feedback the output of described second integral device from signal drift, the plus earth of wherein said second diode taking place; Described second diode links to each other with described first integrator output with the 5th electric capacity tie point.
12. voltage according to claim 2, current integral sampling device, it is characterized in that: described voltage/frequency change-over circuit comprises: a voltage/frequency conversion chip, its input is in order to obtain described current signal, and described power circuit provides operating voltage for it;
One reference voltage generating circuit, it comprises: one first triode, its collector electrode links to each other with described power circuit, and its base stage links to each other with described voltage/frequency conversion chip reference voltage output end; The 6th resistance and the 7th resistance of one series connection, the one end links to each other with the base stage of described first triode, other end ground connection, its series connection point links to each other with the emitter of described first triode.
13. voltage according to claim 12, current integral sampling device, it is characterized in that: also comprise: a photoelectricity separaant unit, it is connected with the signal output part of described voltage, and described photoelectricity separaant unit is two photoelectrical couplers.
14. a voltage, current integral sampling device, it comprises: a box body, be provided with a current transformer in the described box body, and described current transformer center has a phase line to pass, and exports one second voltage sampling signal; It is characterized in that also be provided with and access voltage cell always, it comprises in described box body: a voltage acquisition subelement, it is arranged on the described phase line, in order to obtain real-time voltage signal and to transfer first voltage sampling signal to;
One voltage, it is connected with described voltage acquisition subelement and current transformer respectively, with described first voltage sampling signal and described second voltage sampling signal, be converted to respectively and each self-corresponding first frequency signal and the output of second frequency signal; Described voltage comprises:
One integrating circuit, its magnitude of voltage to described first voltage sampling signal and described second voltage sampling signal carry out integral processing and are converted to first current value and second current value that is directly proportional with described magnitude of voltage respectively;
One voltage/frequency change-over circuit, it obtains described first frequency signal and second frequency signal that described first current value and second current value and output are directly proportional with described magnitude of voltage.
15. voltage according to claim 14, current integral sampling device is characterized in that, described voltage acquisition subelement comprises: a voltage sample assembly, and it directly gathers real-time voltage signal from described phase line;
One voltage signal processing circuit, it carries out first voltage sampling signal that rectification is converted to direct current with described real-time voltage signal;
And power circuit, it carries out voltage stabilizing, filtering with described first voltage sampling signal and converts supply voltage output to.
16. voltage according to claim 15, current integral sampling device is characterized in that, described voltage sample assembly is the mechanical structure assembly, and it comprises:
One conduction sampling part, its direct contacting metal power line or see through insulated hull and directly contact the electric power core obtains voltage signal real-time on the power line;
One sampling fixture makes described conduction sampling part be connected firmly with described power line.
17. voltage according to claim 16, current integral sampling device is characterized in that: when described power line had insulated hull, described conduction sampling part was the pin dentalation, and it thrusts described power line and contacts with the electric power core.
18. voltage according to claim 15, current integral sampling device, it is characterized in that: described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: first voltage-stabiliser tube that one first resistance, one is connected with it, one with described first resistance rectifier bridge in parallel, the two ends of wherein said first resistance obtain is described real-time voltage signal, and described rectifier bridge is exported described first voltage sampling signal.
19. voltage according to claim 18, current integral sampling device is characterized in that: described power circuit comprises: one the 4th resistance, and it is connected in order to step-down with described cathode rectifier;
Second voltage-stabiliser tube of one parallel connection, first electric capacity and second electric capacity are in order to carry out voltage stabilizing, the output of filtering formation stable power.
20. voltage according to claim 15, current integral sampling device, it is characterized in that: described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: first resistance of at least two groups series connection, one with described one of them first resistance rectifier bridge in parallel, described rectifier bridge is exported described first voltage sampling signal.
21. voltage according to claim 15, current integral sampling device, it is characterized in that: described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: first resistance that at least two groups are parallel with one another and electric capacity, one and one of them organize the rectifier bridge that described first resistance and electric capacity are in parallel, described rectifier bridge is exported described first voltage sampling signal.
22. voltage according to claim 15, current integral sampling device, it is characterized in that: described voltage signal processing circuit comprises: one first potential circuit, it is handled described real-time voltage signal and produces described first voltage sampling signal, it comprises: the sampling capacitor of at least two groups series connection, one rectifier bridge that is in parallel with one of them sampling capacitor, described rectifier bridge is exported described first voltage sampling signal.
23. voltage according to claim 15, current integral sampling device is characterized in that: described integrating circuit comprises:
One first integrator, its inverting input obtain described first voltage sampling signal, and described power circuit provides operating voltage for it;
One second integral device, its inverting input obtain described second voltage sampling signal, and described power circuit provides operating voltage for it.
24. voltage according to claim 23, current integral sampling device is characterized in that: also comprise:
The 5th resistance of one parallel connection and the 3rd electric capacity, one parallel connected end are connected with the in-phase input end of described first integrator with the second integral device respectively, other end ground connection;
The 4th electric capacity of one series connection, first diode prevent that as feedback described first integrator output from signal drift taking place;
And the 5th electric capacity of a series connection and second diode prevent that as feedback the output of described second integral device from signal drift taking place, the wherein said first diode also ground connection of connecting with the anode of described second diode; Described first diode links to each other with described first integrator output with the 4th electric capacity tie point, and described second diode links to each other with described second integral device output with the 5th electric capacity tie point.
25. voltage according to claim 15, current integral sampling device, it is characterized in that: described voltage/frequency change-over circuit comprises: a voltage/frequency conversion chip, its input is in order to obtain described current signal, and described power circuit provides operating voltage for it;
One reference voltage generating circuit, it comprises: one first triode, its collector electrode links to each other with described power circuit, and its base stage links to each other with described voltage/frequency conversion chip reference voltage output end; The 6th resistance and the 7th resistance of one series connection, the one end links to each other with the base stage of described first triode, other end ground connection, its series connection point links to each other with the emitter of described first triode.
26. voltage according to claim 25, current integral sampling device, it is characterized in that: also comprise: a photoelectricity separaant unit, it is connected with the signal output part of described voltage, and described photoelectricity separaant unit is two photoelectrical couplers.
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| CN200810125009XA CN101615501B (en) | 2008-06-24 | 2008-06-24 | Voltage and current integral sampling device |
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| CN200810125009XA CN101615501B (en) | 2008-06-24 | 2008-06-24 | Voltage and current integral sampling device |
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| CN101615501B true CN101615501B (en) | 2011-09-28 |
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| CN102313833A (en) * | 2011-07-22 | 2012-01-11 | 四川省电力公司达州电业局 | Voltage signal collector |
| CN102360871B (en) * | 2011-08-23 | 2012-11-21 | 常熟开关制造有限公司(原常熟开关厂） | Mutual inductor packaging assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2339295A (en) * | 1998-02-12 | 2000-01-19 | Furukawa Electric Co Ltd | Instrument for measuring alternating current |
| CN101034101A (en) * | 2007-02-02 | 2007-09-12 | 湖北盛佳电器设备有限公司 | Straight-through current transformer for taking voltage from wrapping conductor using puncturing method |
| CN101067984A (en) * | 2007-03-30 | 2007-11-07 | 清华大学 | Electronic mutual inductor with anti-stealing electricity function |
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2008
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2339295A (en) * | 1998-02-12 | 2000-01-19 | Furukawa Electric Co Ltd | Instrument for measuring alternating current |
| CN101034101A (en) * | 2007-02-02 | 2007-09-12 | 湖北盛佳电器设备有限公司 | Straight-through current transformer for taking voltage from wrapping conductor using puncturing method |
| CN101067984A (en) * | 2007-03-30 | 2007-11-07 | 清华大学 | Electronic mutual inductor with anti-stealing electricity function |
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