CN202614845U - Electric energy measuring instrument - Google Patents
Electric energy measuring instrument Download PDFInfo
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- CN202614845U CN202614845U CN 201220154604 CN201220154604U CN202614845U CN 202614845 U CN202614845 U CN 202614845U CN 201220154604 CN201220154604 CN 201220154604 CN 201220154604 U CN201220154604 U CN 201220154604U CN 202614845 U CN202614845 U CN 202614845U
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Abstract
The utility model relates to an electric energy measuring instrument. When three phases and three wires are measured, a current output end of an A-phase unit is connected with a current input end or a positive voltage end of a B-phase unit, a current output end of a C-phase unit is connected with the positive voltage end or the current input end of the B-phase unit, and the voltage of the B-phase unit is provided with a resistor; and when three phases and four wires are measured, a current output end of an A1-phase unit of a measuring unit I is connected with a positive voltage end or a current input end of an A2-phase unit or a B2-phase unit or a C2-phase unit of a measuring unit II, a current output end of a B1-phase unit of the measuring unit I is connected with the positive voltage end or the current input end of the A2-phase unit or the B2-phase unit or the C2-phase unit of the measuring unit II, a current output end of a C1-phase unit of the measuring unit I is connected with the positive voltage end or the current input end of the A2-phase unit or the B2-phase unit or the C2-phase unit of the measuring unit II, and voltage ends of the A2-phase unit, the B2-phase unit, and the C2-phase unit of the measuring unit II are provided with resistors respectively. Current phase differences among different phases are calculated by adopting the solution provided by the utility model.
Description
Technical field
The utility model relates to field of measurement, particularly relates to a kind of electric energy metering device.
Background technology
The at present domestic utensil kind that is used for electric energy metrical is a lot, and electric energy metering device is among the development process with rapid changepl. never-ending changes and improvements.As everyone knows, known three-phase electric energy metering utensil generally includes power circuit, voltage sampling circuit, current sampling circuit, integrating metrology unit, microcontroller, decompression circuit, reservoir, LCD display, keyboard unit, communication unit etc.At present general metering units is applicable to phase three-wire three electric energy metering device and three-phase and four-line electric energy metering device; Metering units is integrated 7 road A/D converters; Can be digital signal with 7 tunnel analog signal conversion, form one group of voltage, current input signal conversion converter, form 1 group of input signal converter like A phase voltage, A phase current by 2 road A/D converters; Have 3 groups, i.e. A, B, C phase converter.The function of metering units can record phase differential (being phase angle), active energy, the reactive energy of every group voltage effective value, current effective value, active power, power factor, voltage and electric current; Can also obtain three phase differential (being angle) between the voltage etc.; Yet, but do not measure the function of two current and phase differences between the phase.
The utility model content
Based on this, being necessary provides a kind of electric energy metering device to calculating two current and phase difference problems between the phase, and it connects simple, convenience of calculation.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of electric energy metering device; Comprise metering units; Said metering units comprises A facies unit, B facies unit, C facies unit; The current output terminal of A facies unit is connected with the current input terminal or the positive voltage terminal of B facies unit, and the current output terminal of C facies unit is connected with the positive voltage terminal or the current input terminal of B facies unit, is connected with resistance between the positive voltage terminal of said B facies unit and the negative voltage side.
According to above-mentioned the utility model scheme; Connected mode through interface changes, and has realized calculating the not phase differential between the homophase and move back the benefit electric weight of phase three-wire three electric energy metering device, connects simple; Need not design chips again; Improvement cost is low, calculates easily, has improved in the line computation decompression and has moved back the efficient of mending electric weight.
Further, said electric energy metering device is an electric energy meter.
According to above-mentioned the utility model scheme, the connected mode change through interface has realized calculating the not phase differential between the homophase of three-phase three-wire electric energy meter.
Further, the current output terminal of said A facies unit is connected with the current input terminal of B facies unit, and the current output terminal of said C facies unit is connected with the positive voltage terminal of B facies unit;
Or
The current output terminal of said A facies unit is connected with the positive voltage terminal of B facies unit, and the current output terminal of said C facies unit is connected with the current input terminal of B facies unit, and the voltage end of said B facies unit is provided with resistance.
According to above-mentioned the utility model scheme, the connected mode change through interface has realized calculating the not phase differential between the homophase of phase three-wire three electric energy metering device.
A kind of electric energy metering device; Comprise metering units one and metering units two; Said metering units one comprises A1 facies unit, B1 facies unit, C1 facies unit; Said metering units two comprises A2 facies unit, B2 facies unit, C2 facies unit; The current output terminal of the A1 facies unit of metering units one is connected with the positive voltage terminal or the current input terminal of the A2 facies unit of metering units two or B2 facies unit or C2 facies unit; The current output terminal of the B1 facies unit of metering units one is connected with the positive voltage terminal or the current input terminal of the A2 facies unit of metering units two or B2 facies unit or C2 facies unit; The C1 facies unit current output terminal of metering units one is connected with the positive voltage terminal or the current input terminal of the A2 facies unit of metering units two or B2 facies unit or C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 facies unit of said metering units two, B2 facies unit and C2 facies unit and the negative voltage side.
According to above-mentioned the utility model scheme; Connected mode through interface changes, and has realized calculating the not phase differential between the homophase and move back the benefit electric weight of three-phase and four-line electric energy metering device, connects simple; Need not design chips again; Improvement cost is low, calculates easily, has improved in the line computation decompression and has moved back the efficient of mending electric weight.
Further, said electric energy metering device is an electric energy meter.
According to above-mentioned the utility model scheme, the connected mode change through interface has realized calculating the not phase differential between the homophase of three-phase and four-line electric energy meter.
Further, the current output terminal of said A1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the current output terminal of said B1 facies unit is connected with the positive voltage terminal of B2 facies unit, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of C2 facies unit;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the current output terminal of said B1 facies unit is connected with the positive voltage terminal of C2 facies unit, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of B2 facies unit;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of B2 facies unit, and the current output terminal of said B1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of C2 facies unit;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of B2 facies unit, and the current output terminal of said B1 facies unit is connected with the positive voltage terminal of C2 facies unit, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of A2 facies unit;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of C2 facies unit, and the current output terminal of said B1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of B2 facies unit;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of C2 facies unit, and the current output terminal of said B1 facies unit is connected with the positive voltage terminal of B2 facies unit, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of A2 facies unit,
The voltage end of A2, B2, C2 facies unit is respectively equipped with resistance.
According to above-mentioned the utility model scheme, the connected mode change through interface has realized calculating the not phase differential between the homophase of three-phase and four-line electric energy metering device.
Further; The current output terminal of said A1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of said A2 facies unit is connected with C2 phase current input end, and the current output terminal of said B1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the negative voltage side of A2 facies unit is connected with the input end of B2 phase current; The current output terminal of said C1 facies unit is connected with the positive voltage terminal of B2 facies unit, and the negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit;
Or
The current output terminal of said A1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of said A2 facies unit is connected with C2 phase current input end; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the negative voltage side of A2 facies unit is connected with the input end of B2 phase current;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of A2 facies unit; The negative voltage side of A2 facies unit is connected with the input end of B2 phase current; The current output terminal of said B1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of said A2 facies unit is connected with C2 phase current input end, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of B2 facies unit, and the negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of A2 facies unit; The negative voltage side of A2 facies unit is connected with the input end of B2 phase current; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit, and the current output terminal of said C1 facies unit is connected with the current input terminal of A2 facies unit, and the current output terminal of said A2 facies unit is connected with C2 phase current input end;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of said B1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of said A2 facies unit is connected with C2 phase current input end, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the negative voltage side of A2 facies unit is connected with the input end of B2 phase current;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the negative voltage side of A2 facies unit is connected with the input end of B2 phase current, and the current output terminal of said C1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of said A2 facies unit is connected with C2 phase current input end
The voltage end of A2, B2, C2 facies unit is respectively equipped with resistance.
According to above-mentioned the utility model scheme, the connected mode change through interface has realized calculating the not phase differential between the homophase of three-phase and four-line electric energy metering device.
Description of drawings
Fig. 1 is the structural representation of the electric energy metering device one of the utility model;
Fig. 2 is the structural representation of electric energy metering device one embodiment one of the utility model;
Fig. 3 is the structural representation of electric energy metering device one embodiment two of the utility model;
Fig. 4 is the structural representation of the electric energy metering device two of the utility model;
Fig. 5 is the structural representation of electric energy metering device two embodiment one of the utility model;
Fig. 6 is the structural representation of electric energy metering device two embodiment two of the utility model;
Fig. 7 is the structural representation of electric energy metering device two embodiment three of the utility model;
Fig. 8 is the structural representation of electric energy metering device two embodiment four of the utility model;
Fig. 9 is the structural representation of electric energy metering device two embodiment five of the utility model;
Figure 10 is the structural representation of electric energy metering device two embodiment six of the utility model;
Figure 11 is the structural representation of electric energy metering device two embodiment seven of the utility model;
Figure 12 is the structural representation of electric energy metering device two embodiment eight of the utility model;
Figure 13 is the structural representation of electric energy metering device two embodiment nine of the utility model;
Figure 14 is the structural representation of electric energy metering device two embodiment ten of the utility model;
Figure 15 is the structural representation of electric energy metering device two embodiment 11 of the utility model;
Figure 16 is the structural representation of electric energy metering device two embodiment 12 of the utility model.
Embodiment
Below in conjunction with concrete preferred embodiments the utility model being moved back the device of mending electric weight in the line computation decompression sets forth in detail.
A kind of electric energy metering device; Like Fig. 1, the structural representation for the electric energy metering device one of the utility model comprises metering units 100; Metering units comprises A facies unit 101, B facies unit 102, C facies unit 103; The current output terminal of A facies unit is connected with the current input terminal or the positive voltage terminal of B facies unit, and the current output terminal of C facies unit is connected with the positive voltage terminal or the current input terminal of B facies unit, is connected with resistance between the positive voltage terminal of B facies unit and the negative voltage side.The computation chip that is connected with A, B, C facies unit is not shown among Fig. 1.
Electric energy metering device generally comprises power circuit, voltage sampling circuit, current sampling circuit, integrating metrology unit, microcontroller, decompression circuit, reservoir, LCD display, keyboard unit, communication unit etc.Metering units is applicable to the phase three-wire three electric energy metering device at present.Measure phase three-wire three, original technology inserts the AB voltage difference at the A voltage end, the C voltage end inserts BC voltage difference, A electric current, C electric current, and the voltage end of B and current terminal do not insert data.The phase differential that metering units can record every group voltage effective value, current effective value, active power, power factor, voltage and electric current (is U
ABAnd I
ABetween phase differential, U
BCAnd I
CBetween phase differential), active energy, reactive energy, can also obtain three phase differential (being angle) between the voltage etc., yet, but do not measure the function of two current and phase differences between the phase.Each embodiment that below just calculates the current and phase difference of phase three-wire three electric energy metering device does detailed description.
Embodiment one
In concrete work,,, be further specifying to the metering units among Fig. 1 for the structural representation of electric energy metering device one embodiment one of the utility model referring to Fig. 2.Metering units comprises A facies unit, B facies unit, C facies unit; Also comprise the computation chip that is connected with A, B, C; The current output terminal of A facies unit is connected with the current input terminal of B facies unit; The current output terminal of C facies unit is connected with the positive voltage terminal of B facies unit, is connected with resistance between the positive voltage terminal of B facies unit and the negative voltage side.
TA1 and TV1 are the current/voltage of the preceding A facies unit of repacking, and TA2 and TA3 are the current/voltage of the B facies unit before reequiping, and TA4 and TV2 are the current/voltage of the C facies unit before reequiping.After the repacking, concrete connected mode is:
Current transformer TA1 input termination I in the table
A+, the input end of current transformer TA2 in the output termination table, the output termination I of TA2
A-, the secondary parallel resistance of TA2 is after resistance connects computation chip.The former positive voltage termination of current transformer TA3 I in the table
C+, the input end of current transformer TA4 in the former negative voltage termination table, the output termination I of TA4
C-, the secondary parallel resistance of TA3 is after resistance connects metering units.
Utilize present metering units can calculate the characteristic of the electric current and voltage phase differential between each facies unit, present embodiment through above-mentioned change after,, then realizing A, C current unit are connected in the same facies unit is in the B facies unit.This group converter of TA2 and TA3 just can be imported
Electric current becomes 2 current signals of input by original measurement B phase voltage, current signal, owing to all convert voltage signal into after being input to metering units, so can draw the phase difference beta of two electric currents according to the computing function of metering units own
CA
According to the current and phase difference β that measures
CA,, then can obtain to move back the benefit electric weight through the calculating of microcontroller.
Embodiment two
In concrete work,,, be further specifying to the metering units among Fig. 1 for the structural representation of electric energy metering device one embodiment two of the utility model referring to Fig. 3.Metering units comprises A facies unit, B facies unit, C facies unit; Also comprise the computation chip that is connected with A, B, C; The current output terminal of A facies unit is connected with the positive voltage terminal of B facies unit; The current output terminal of C facies unit is connected with the current input terminal of B facies unit, is connected with resistance between the positive voltage terminal of B facies unit and the negative voltage side.
TA1 and TV1 are the current/voltage of the preceding A facies unit of repacking, and TA2 and TA3 are the current/voltage of the B facies unit before reequiping, and TA4 and TV2 are the current/voltage of the C facies unit before reequiping.After the repacking, concrete connected mode is:
Current transformer TA1 input termination I in the table
A+, the former malleation end of current transformer TA3 in the output termination table, the former negative electricity termination of TA3 I
A-, the secondary parallel resistance of TA3 is after resistance connects metering units; The input termination I of current transformer TA2 in the table
C+, the input end of current transformer TA4 in the output termination table of TA2, the output termination I of TA4
C-
Utilize present metering units can calculate the characteristic of the electric current and voltage phase differential between each facies unit, present embodiment through above-mentioned change after,, then realizing A, C current unit are connected in the same facies unit is in the B facies unit.This group converter of TA2 and TA3 just can be imported
Electric current becomes 2 current signals of input by original measurement B phase voltage, current signal, owing to all convert voltage signal into after being input to metering units, so can draw the phase difference beta of two electric currents according to the computing function of metering units own
CA
According to the current and phase difference β that measures
CA,, then can obtain to move back the benefit electric weight through the calculating of microcontroller.Electric energy metering device among above-mentioned each embodiment can be an electric energy meter, or is used for measurement mechanisms such as transformer terminal unit, negative control terminal.
Another kind of electric energy metering device; Like Fig. 4; Structural representation for the electric energy metering device two of the utility model; Comprise metering units 1 and metering units 2 200; Metering units one comprises A1 facies unit 101, B1 facies unit 102, C1 facies unit 103, and metering units 2 200 comprises A2 facies unit 201, B2 facies unit 202, C2 facies unit 203, it is characterized in that; The current output terminal of the A1 facies unit of metering units one is connected with the positive voltage terminal or the current input terminal of the A2 facies unit of metering units two or B2 facies unit or C2 facies unit; The current output terminal of the B1 facies unit of metering units one is connected with the positive voltage terminal or the current input terminal of the A2 facies unit of metering units two or B2 facies unit or C2 facies unit, and the current output terminal of the C1 facies unit of metering units one is connected with the positive voltage terminal or the current input terminal of the A2 facies unit of metering units two or B2 facies unit or C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.The computation chip that is connected with A, B, C facies unit is not shown among Fig. 4.
Electric energy metering device generally comprises power circuit, voltage sampling circuit, current sampling circuit, integrating metrology unit, microcontroller, decompression circuit, reservoir, LCD display, keyboard unit, communication unit etc.Metering units is applicable to the three-phase and four-line electric energy metering device at present.Measure three-phase and four-line, original technology is gone into A voltage in A phase voltage termination, and A phase current termination is gone into the A electric current; Go into B voltage in B phase voltage termination, B phase current termination is gone into the B electric current; Go into C voltage in C phase voltage termination, C phase current termination is gone into the C electric current.The phase differential that metering units can record every group voltage effective value, current effective value, active power, power factor, voltage and electric current (is U
AAnd I
ABetween phase differential, U
BAnd I
BBetween phase differential, U
CAnd I
CBetween phase differential), active energy, reactive energy, can also obtain three phase differential (being angle) between the voltage etc., yet, but do not measure the function of two current and phase differences between the phase.Each embodiment that below just calculates the current and phase difference of three-phase and four-line electric energy metering device does detailed description.
Embodiment one
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment one of the utility model referring to Fig. 5.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the positive voltage terminal of A2 facies unit; The current output terminal of B1 facies unit is connected with the positive voltage terminal of B2 facies unit; The current output terminal of C1 facies unit is connected with the positive voltage terminal of C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
TA4 is the voltage of the preceding A2 facies unit of repacking, and TA5 is the voltage of the B2 facies unit before reequiping, and TA5 is the voltage of the C2 facies unit before reequiping.After the repacking, concrete connected mode is:
Concrete connected mode is: current transformer TA1 input end termination I in the table
A+, the former malleation end of current transformer TA4 in the TA1 output termination table, the former negative pressure termination I of TA4
A-, the secondary parallel resistance of TA4 is after resistance connects computation chip two; Current transformer TA2 input termination I in the table
B+, the former malleation end of current transformer TA5 in the TA2 output termination table, the former negative pressure termination I of TA5
B-, the secondary parallel resistance of TA5 is after resistance connects metering units two; Current transformer TA3 input termination I in the table
C+, the former malleation end of current transformer TA6 in the TA3 output termination table, the former negative pressure termination I of TA6
C-, the secondary parallel resistance of TA6 is after resistance connects metering units two.
Utilize present metering units can calculate the characteristic of voltage difference between phase and phase, present embodiment through above-mentioned change after, then realize A, B, C current unit are connected each voltage end of same metering units.TA4, TA5, TA6 just can import
electric current; Become 3 current signals of input by original measurement A, B, C phase voltage signal; Owing to all convert voltage signal into after being input to metering units, so can draw the phase differential of three electric currents according to the computing function of metering units own.Be the phase differential θ of A phase current and B phase current
AB, A phase current and C phase current phase differential θ
AC, B phase current and C phase current phase differential θ
BC
Metering units one is connected microcontroller simultaneously with metering units two.According to the current and phase difference θ that obtains
AB, θ
AC, θ
BC, microcontroller calculates, and should move back the benefit amount in the time of can drawing decompression.
Embodiment two
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment two of the utility model referring to Fig. 6.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the positive voltage terminal of A2 facies unit; The current output terminal of B1 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of C1 facies unit is connected with the positive voltage terminal of B2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
TA4 is the voltage of the preceding A2 facies unit of repacking, and TA5 is the voltage of the B2 facies unit before reequiping, and TA5 is the voltage of the C2 facies unit before reequiping.After the repacking, concrete connected mode is similar with embodiment one.
In like manner can get; Present embodiment through above-mentioned change after; TA4, TA5, TA6 just can import
electric current; Become 3 current signals of input by original measurement A, B, C phase voltage signal; Owing to all convert voltage signal into after being input to metering units, so can draw the phase differential of three electric currents according to the computing function of metering units own.Metering units one is connected microcontroller simultaneously with metering units two.According to the current and phase difference θ that obtains
AB, θ
AC, θ
BC, microcontroller calculates, and should move back the benefit amount in the time of can drawing decompression.
Embodiment three
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment three of the utility model referring to Fig. 7.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the positive voltage terminal of B2 facies unit; The current output terminal of B1 facies unit is connected with the positive voltage terminal of A2 facies unit; The current output terminal of C1 facies unit is connected with the positive voltage terminal of C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
TA4 is the voltage of the preceding A2 facies unit of repacking, and TA5 is the voltage of the B2 facies unit before reequiping, and TA5 is the voltage of the C2 facies unit before reequiping.After the repacking, concrete connected mode is similar with embodiment one.
In like manner can get; Present embodiment through above-mentioned change after; TA4, TA5, TA6 just can import
electric current; Become 3 current signals of input by original measurement A, B, C phase voltage signal; Owing to all convert voltage signal into after being input to metering units, so can draw the phase differential of three electric currents according to the computing function of metering units own.Metering units one is connected microcontroller simultaneously with metering units two.According to the current and phase difference θ that obtains
AB, θ
AC, θ
BC, microcontroller calculates, and should move back the benefit amount in the time of can drawing decompression.
Embodiment four
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment four of the utility model referring to Fig. 8.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the positive voltage terminal of B2 facies unit; The current output terminal of B1 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of C1 facies unit is connected with the positive voltage terminal of A2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
TA4 is the voltage of the preceding A2 facies unit of repacking, and TA5 is the voltage of the B2 facies unit before reequiping, and TA5 is the voltage of the C2 facies unit before reequiping.After the repacking, concrete connected mode is similar with embodiment one.
In like manner can get; Present embodiment through above-mentioned change after; TA4, TA5, TA6 just can import
electric current; Become 3 current signals of input by original measurement A, B, C phase voltage signal; Owing to all convert voltage signal into after being input to metering units, so can draw the phase differential of three electric currents according to the computing function of metering units own.Metering units one is connected microcontroller simultaneously with metering units two.According to the current and phase difference θ that obtains
AB, θ
AC, θ
BC, microcontroller calculates, and should move back the benefit amount in the time of can drawing decompression.
Embodiment five
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment five of the utility model referring to Fig. 9.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of B1 facies unit is connected with the positive voltage terminal of A2 facies unit; The current output terminal of C1 facies unit is connected with the positive voltage terminal of B2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
TA4 is the voltage of the preceding A2 facies unit of repacking, and TA5 is the voltage of the B2 facies unit before reequiping, and TA5 is the voltage of the C2 facies unit before reequiping.After the repacking, concrete connected mode is similar with embodiment one.
In like manner can get; Present embodiment through above-mentioned change after; TA4, TA5, TA6 just can import
electric current; Become 3 current signals of input by original measurement A, B, C phase voltage signal; Owing to all convert voltage signal into after being input to metering units, so can draw the phase differential of three electric currents according to the computing function of metering units own.Metering units one is connected microcontroller simultaneously with metering units two.According to the current and phase difference θ that obtains
AB, θ
AC, θ
BC, microcontroller calculates, and should move back the benefit amount in the time of can drawing decompression.
Embodiment six
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment six of the utility model referring to Figure 10.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of B1 facies unit is connected with the positive voltage terminal of B2 facies unit; The current output terminal of C1 facies unit is connected with the positive voltage terminal of A2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
TA4 is the voltage of the preceding A2 facies unit of repacking, and TA5 is the voltage of the B2 facies unit before reequiping, and TA5 is the voltage of the C2 facies unit before reequiping.After the repacking, concrete connected mode is similar with embodiment one.
In like manner can get; Present embodiment through above-mentioned change after; TA4, TA5, TA6 just can import
electric current; Become 3 current signals of input by original measurement A, B, C phase voltage signal; Owing to all convert voltage signal into after being input to metering units, so can draw the phase differential of three electric currents according to the computing function of metering units own.Metering units one is connected microcontroller simultaneously with metering units two.According to the current and phase difference θ that obtains
AB, θ
AC, θ
BC, microcontroller calculates, and should move back the benefit amount in the time of can drawing decompression.
Embodiment seven
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment seven of the utility model referring to Figure 11.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of A2 facies unit is connected with C2 phase current input end; The current output terminal of B1 facies unit is connected with the positive voltage terminal of A2 facies unit; The negative voltage side of A2 facies unit is connected with the input end of B2 phase current; The current output terminal of C1 facies unit is connected with the positive voltage terminal of B2 facies unit, and the negative voltage side of B2 facies unit is connected with the positive voltage terminal of C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
TA4 and TA5 are the electric current and the voltage of the preceding A2 facies unit of repacking, and TA6 and TA7 are the electric current and the voltage of the B2 facies unit before reequiping, and TA8 and TA9 are the electric current and the voltage of the C2 facies unit before reequiping.After the repacking, concrete connected mode is:
Concrete connected mode is: current transformer TA1 input termination I in the table
A+, the input end of current transformer TA4 in TA1 output termination metering units two tables, the input end of current transformer TA8 in the output termination table of TA4, TA8 output termination I
A-, parallel resistance is after resistance connects computation chip two to the secondary of TA4, TA8 respectively, and current transformer TA2 imports termination I in the table
B+, the former malleation end of current transformer TA5 in the TA2 output termination table, the input end of current transformer TA6 in the former negative pressure termination table of TA5, the output termination I of TA6
B-, parallel resistance is after resistance connects computation chip two to the secondary of TA5, TA6 respectively, and current transformer TA3 imports termination I in the table
C+, the former malleation end of current transformer TA7 in the TA3 output termination table, the former malleation end of current transformer TA9 in the former negative pressure termination table of TA7, the former negative pressure termination I of TA9
C-, the secondary of TA7, TA9 respectively parallel resistance after resistance connects computation chip two.
Through after the above-mentioned change, utilize present metering units can calculate between phase and phase voltage phase difference and the characteristic of voltage and current and phase difference, metering units two original 3 groups of voltages, current signal input ends just become 3 groups of current signal input ends, that is:
By the phase differential of the measured 3 groups of AC signals of chip functions, i.e. the phase differential θ of A phase current and B phase current
AB, A phase current and C phase current phase differential θ
AC, B phase current and C phase current phase differential θ
BC
Metering units one is connected microcontroller simultaneously with metering units two.According to the current and phase difference θ that obtains
AB, θ
AC, θ
BC, microcontroller calculates, and should move back the benefit amount in the time of can drawing decompression.
Embodiment eight
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment eight of the utility model referring to Figure 12.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of A2 facies unit is connected with C2 phase current input end; The current output terminal of B1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of B2 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of C1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the negative voltage side of A2 facies unit is connected with the input end of B2 phase current, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
Like embodiment seven, in like manner can get two current and phase difference θ between the phase
AB, θ
AC, θ
BC, should move back the benefit electric weight during according to the phase difference calculating decompression.
Embodiment nine
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment nine of the utility model referring to Figure 13.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the positive voltage terminal of A2 facies unit; The negative voltage side of A2 facies unit is connected with the input end of B2 phase current; The current output terminal of B1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of A2 facies unit is connected with C2 phase current input end; The current output terminal of C1 facies unit is connected with the positive voltage terminal of B2 facies unit, and the negative voltage side of B2 facies unit is connected with the positive voltage terminal of C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
Like embodiment seven, in like manner can get two current and phase difference θ between the phase
AB, θ
AC, θ
BC, should move back the benefit electric weight during according to the phase difference calculating decompression.
Embodiment ten
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment ten of the utility model referring to Figure 14.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the positive voltage terminal of A2 facies unit; The negative voltage side of A2 facies unit is connected with the input end of B2 phase current; The current output terminal of B1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of B2 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of C1 facies unit is connected with the current input terminal of A2 facies unit, and the current output terminal of A2 facies unit is connected with C2 phase current input end, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
Like embodiment seven, in like manner can get two current and phase difference θ between the phase
AB, θ
AC, θ
BC, should move back the benefit electric weight during according to the phase difference calculating decompression.
Embodiment 11
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment 11 of the utility model referring to Figure 15.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of B2 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of B1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of A2 facies unit is connected with C2 phase current input end; The current output terminal of C1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the negative voltage side of A2 facies unit is connected with the input end of B2 phase current, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
Like embodiment seven, in like manner can get two current and phase difference θ between the phase
AB, θ
AC, θ
BC, should move back the benefit electric weight during according to the phase difference calculating decompression.
Embodiment 12
In concrete work,,, be further specifying to the metering units among Fig. 4 for the structural representation of electric energy metering device two embodiment 12 of the utility model referring to Figure 16.Metering units comprises metering units one and metering units two, and metering units one enclosed mass A1 facies unit, B1 facies unit, C1 facies unit also comprise the computation chip one that is connected with A1, B1, C1; Metering units two enclosed mass A2 facies units, B2 facies unit, C2 facies unit also comprise the computation chip two that is connected with A2, B2, C2.The current output terminal of A1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of B2 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of B1 facies unit is connected with the positive voltage terminal of A2 facies unit; The negative voltage side of A2 facies unit is connected with the input end of B2 phase current; The current output terminal of C1 facies unit is connected with the current input terminal of A2 facies unit, and the current output terminal of A2 facies unit is connected with C2 phase current input end, is connected with resistance between the positive voltage terminal of the A2 of metering units two, B2 and each facies unit of C2 and the negative voltage side.
Like embodiment seven, in like manner can get two current and phase difference θ between the phase
AB, θ
AC, θ
BC, should move back the benefit electric weight during according to the phase difference calculating decompression.
Electric energy metering device among above-mentioned each embodiment can be an electric energy meter, or is used for measurement mechanisms such as transformer terminal unit, negative control terminal.
The above embodiment has only expressed several kinds of embodiments of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection domain of the utility model.Therefore, the protection domain of the utility model patent should be as the criterion with accompanying claims.
Claims (7)
1. electric energy metering device; Comprise metering units; Said metering units comprises A facies unit, B facies unit, C facies unit, it is characterized in that, the current output terminal of A facies unit is connected with the current input terminal or the positive voltage terminal of B facies unit; The current output terminal of C facies unit is connected with the positive voltage terminal or the current input terminal of B facies unit, is connected with resistance between the positive voltage terminal of said B facies unit and the negative voltage side.
2. electric energy metering device according to claim 1 is characterized in that said electric energy metering device is an electric energy meter.
3. electric energy metering device according to claim 1 and 2; It is characterized in that; The current output terminal of said A facies unit is connected with the current input terminal of B facies unit; The current output terminal of said C facies unit is connected with the positive voltage terminal of B facies unit, is connected with resistance between the positive voltage terminal of said B facies unit and the negative voltage side;
Or
The current output terminal of said A facies unit is connected with the positive voltage terminal of B facies unit, and the current output terminal of said C facies unit is connected with the current input terminal of B facies unit, is connected with resistance between the positive voltage terminal of said B facies unit and the negative voltage side.
4. electric energy metering device; It is characterized in that; Comprise metering units one and metering units two; Said metering units one comprises A1 facies unit, B1 facies unit, C1 facies unit; Said metering units two comprises A2 facies unit, B2 facies unit, C2 facies unit; The current output terminal of the A1 facies unit of said metering units one is connected with the positive voltage terminal or the current input terminal of the A2 facies unit of metering units two or B2 facies unit or C2 facies unit; The current output terminal of the B1 facies unit of metering units one is connected with the positive voltage terminal or the current input terminal of the A2 facies unit of metering units two or B2 facies unit or C2 facies unit, and the C1 facies unit current output terminal of metering units one is connected with the positive voltage terminal or the current input terminal of the A2 facies unit of metering units two or B2 facies unit or C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 facies unit of said metering units two, B2 facies unit and C2 facies unit and the negative voltage side.
5. electric energy metering device according to claim 3 is characterized in that said electric energy metering device is an electric energy meter.
6. according to claim 4 or 5 described electric energy metering devices; It is characterized in that; The current output terminal of said A1 facies unit is connected with the positive voltage terminal of A2 facies unit; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of B2 facies unit, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of A2 facies unit; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of said C1 facies unit is connected with the positive voltage terminal of B2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of B2 facies unit; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of A2 facies unit; The current output terminal of said C1 facies unit is connected with the positive voltage terminal of C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of B2 facies unit; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of said C1 facies unit is connected with the positive voltage terminal of A2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of A2 facies unit; The current output terminal of said C1 facies unit is connected with the positive voltage terminal of B2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of B2 facies unit; The current output terminal of said C1 facies unit is connected with the positive voltage terminal of A2 facies unit;, be connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side.
7. according to claim 4 or 5 described electric energy metering devices; It is characterized in that; The current output terminal of said A1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of said A2 facies unit is connected with C2 phase current input end; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the negative voltage side of A2 facies unit is connected with the input end of B2 phase current, and the current output terminal of said C1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side;
Or
The current output terminal of said A1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of said A2 facies unit is connected with C2 phase current input end; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of said C1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the negative voltage side of A2 facies unit is connected with the input end of B2 phase current, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of A2 facies unit; The negative voltage side of A2 facies unit is connected with the input end of B2 phase current; The current output terminal of said B1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of said A2 facies unit is connected with C2 phase current input end; The current output terminal of said C1 facies unit is connected with the positive voltage terminal of B2 facies unit, and the negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of A2 facies unit; The negative voltage side of A2 facies unit is connected with the input end of B2 phase current; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of said C1 facies unit is connected with the current input terminal of A2 facies unit, and the current output terminal of said A2 facies unit is connected with C2 phase current input end, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of said B1 facies unit is connected with the current input terminal of A2 facies unit; The current output terminal of said A2 facies unit is connected with C2 phase current input end; The current output terminal of said C1 facies unit is connected with the positive voltage terminal of A2 facies unit, and the negative voltage side of A2 facies unit is connected with the input end of B2 phase current, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side;
Or
The current output terminal of said A1 facies unit is connected with the positive voltage terminal of B2 facies unit; The negative voltage side of said B2 facies unit is connected with the positive voltage terminal of C2 facies unit; The current output terminal of said B1 facies unit is connected with the positive voltage terminal of A2 facies unit; The negative voltage side of A2 facies unit is connected with the input end of B2 phase current; The current output terminal of said C1 facies unit is connected with the current input terminal of A2 facies unit, and the current output terminal of said A2 facies unit is connected with C2 phase current input end, is connected with resistance between the positive voltage terminal of the A2 of said metering units two, B2 and each facies unit of C2 and the negative voltage side.
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| CN 201220154604 CN202614845U (en) | 2012-04-12 | 2012-04-12 | Electric energy measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220154604 CN202614845U (en) | 2012-04-12 | 2012-04-12 | Electric energy measuring instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628892A (en) * | 2012-04-12 | 2012-08-08 | 广东电网公司中山供电局 | Method for calculating voltage-loss unusual electrical energy measurement on line and electric energy meter |
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2012
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628892A (en) * | 2012-04-12 | 2012-08-08 | 广东电网公司中山供电局 | Method for calculating voltage-loss unusual electrical energy measurement on line and electric energy meter |
| CN102628892B (en) * | 2012-04-12 | 2014-06-04 | 广东电网公司中山供电局 | Method for calculating voltage-loss unusual electrical energy measurement on line and electric energy meter |
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