CN201035130Y - Synthetic tester for mutual inductor electric energy meter - Google Patents

Synthetic tester for mutual inductor electric energy meter Download PDF

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Publication number
CN201035130Y
CN201035130Y CNU2006200079828U CN200620007982U CN201035130Y CN 201035130 Y CN201035130 Y CN 201035130Y CN U2006200079828 U CNU2006200079828 U CN U2006200079828U CN 200620007982 U CN200620007982 U CN 200620007982U CN 201035130 Y CN201035130 Y CN 201035130Y
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power
phase
electric energy
voltage
energy meter
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彭黎迎
于建军
彭黎明
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PENG LIYING YU JIANJUN PENG LIMING
PENG LIYING YU JIANJUN PENG LI
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PENG LIYING YU JIANJUN PENG LIMING
PENG LIYING YU JIANJUN PENG LI
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Abstract

A transformer watt-hour meter comprehensive check meter of the utility model which belongs to the field of electrical measuring technique, specially relates to a transformer watt-hour meter comprehensive check meter which can measure the current transformer, the voltage transformer, the impedance (the current load box included), the admittance (the conductance box and the voltage load box included), the resistance (the resistance box included), the capacitance (the capacitance box included), the inductance (the inductance box included) and the power, the watt-hour meter. The utility model realizes the measurement of various alternating current parameters mainly via the measurement of the in-phase component and the quadrature component of the current and the voltage. The utility model is characterized in that, in the measurement of the in-phase component and the quadrature component of the transformer, the in-phase component can be measured through measuring the active power (power), which can not only reduce the influence of the frequency change and the waveform distortion to the measurement accuracy and can directly trace to a reference with higher accuracy, but also can realize the check of the transformer and the watt-hour mete with one transformer watt-hour meter.

Description

Mutual-inductor electric energy meter comprehensive calibrator
The invention belongs to the Electric Measurement Technology field, relate to a kind of mutual-inductor electric energy meter comprehensive and test instrument, the particularly a kind of mutual-inductor electric energy meter comprehensive calibrator that can measure current transformer, voltage transformer (VT), impedance, admittance, resistance (comprising resistance box), electric capacity (comprising capacitive), inductance (comprising inductance box) and power, electric energy meter.It mainly the measurement of the in-phase component by electric current, voltage and quadrature component realize the measurement of various ac electrics.
At present, mutual-inductor tester and electrical energy meter calibration instrument are two kinds of mutually different gauging instruments, and mutual-inductor tester is used for the verification mutual inductor, and the electrical energy meter calibration instrument is used for the verification electric energy meter, mutual inductor is usually used with electric energy meter and is in the same place, and is most popular in electrician's gauging instrument.Mutual-inductor tester is widely used in the various electrical measurements, mainly be divided into two types: a kind of electrician's of being type mutual-inductor tester, for example the HEG class is comparison ceremony mutual-inductor tester, and its adopts the ratio (in-phase component) of electromagnetic transformer and resistance box conjunction measuring transformer error; Adopt the angular difference (quadrature component) of electromagnetic type phase shifter and capacitive conjunction measuring mutual inductor.Another kind is an electronic transducer calibration instrument, though form is varied, principle is close, is exactly: in the error of measurement branch road, utilize the method for the curtage of measuring measured signal to measure in-phase component; With 90 ° of measured signal phase shifts, utilize the method for surveying the measured signal curtage to measure quadrature component.These mutual-inductor testers, when measuring quadrature component, electromagnetic type phase shifter and capacitive that electrician's formula mutual-inductor tester uses, electronic type phase shifter or electric capacity phase shift that electronic transducer calibration instrument uses, when supply frequency changes or waveform all can bring very mistake when distortion takes place, this is that to learn the people of the principles of electric and electronic engineering known.For example, the principle of certain mutual-inductor tester is as follows: in relatively poor branch road, and working current I OPass through resistance R O, produce voltage U OThis voltage is through amplifying, automatically switch and filtering after, be divided into three the tunnel: the one tunnel and become DC voltage through AC-DC conversion, send into homophase, two analog to digital converters of quadrature; One the tunnel after phase shift, sampling pulse form circuit, send into electronic switch, as the sampling pulse of in-phase component; Electronic switch directly after sampling pulse forms circuit, is sent into, as the sampling pulse of quadrature component in another road.Meanwhile, in relatively poor resistance R ΔOn, the potential difference Δ U=Δ I * R that obtains ΔAlso be admitted to metering circuit, after amplification, switching, filtering, send into two electronic switches respectively, respectively in 90 ° and 0 ° of moment, the in-phase component of extraction potential difference and quadrature component, by corresponding holding circuit, send two analog to digital converters, after suitable computing, demonstrate the ratio error and the phase error of tested current transformer.Simultaneously, U OAfter amplification, alternating current-direct current and analog to digital conversion, demonstrate the number percent of working current.
For overcome be subjected in the existing mutual inductor measuring metering method frequency and waveform variation and influence the deficiency of measuring error, the utility model provides a kind of novel mutual-inductor electric energy meter comprehensive calibrator (hereinafter to be referred as tester), can not only improve measuring accuracy, and, because use the method for power measurement to measure the error of mutual inductor, so can measure electric energy error, measurement power error, measurement impedance, measurement admittance, inductance measuring, measurement electric capacity etc. simultaneously.This is that quadrature component is δ because in the measuring error of mutual inductor, in-phase component is f; In impedance measurement, in-phase component is R, and quadrature component is X; In admittance measurement, in-phase component is G, and quadrature component is B; In inductance measurement, in-phase component is R, and quadrature component is L; In capacitance measurement, in-phase component is G, and quadrature component is C; In electric energy measurement, real component is Wh, and idle component is Varh; Real component W in the power measurement, idle component is Var.
Same real component W in in-phase component f in the measuring error of mutual inductor, the in-phase component R in the impedance measurement, the in-phase component G in the admittance measurement, the in-phase component R in the inductance measurement, the in-phase component G in the capacitance measurement, the power measurement, the real component Wh in the electric energy measurement, represented amount all have common place; No component Var in the power measurement, quadrature component δ in the measuring error of mutual inductor, the quadrature component X in the impedance measurement, the quadrature component B in the admittance measurement, the quadrature component L in the inductance measurement, the quadrature component C in the capacitance measurement, the idle component Var in the power measurement, idle component Varh in the electric energy measurement, represented amount also all has common place, no matter be for the real component or the measurement of idle component, common place is also all arranged on measuring method, mainly is some difference of data processing.Like this, tester according to the present invention's manufacturing, can not only examine and determine mutual inductor, can also examine and determine and exchange meritorious, reactive energy-meter and exchange meritorious, reactive volt-ampere meter, measurement impedance, admittance, inductance, electric capacity etc., therefore, at the tester that foundation the present invention makes, can realize very easily above-mentioned any, two or more functions.
The technical solution adopted for the present invention to solve the technical problems is:
The utility model comprises reference voltage, analog/digital converter, digital processing circuit, central processing unit, electric energy, frequency converter, calibration impulse generator, keyboard; Printer; Host computer, display; Wherein, reference voltage is input in the analog/digital converter, and analog/digital converter is made up of range shift switch and range shift switch, and range shift switch is provided with multi-functional input end; Input end is delivered to analog/digital converter with simulating signal, analog/digital converter outputs to digital signal in the digital processing circuit, digital processing circuit outputs to respectively on central processing unit, calibration impulse generator and electric energy, the frequency converter, the calibration impulse generator is input on the central processing unit, be two-way the connection in twos between central processing unit, printer and the host computer three, central processing unit also outputs to keyboard and display respectively; The calibration impulse generator is exported the pulse CF1 and the CF2 of the usefulness of calibration respectively, and electric energy, frequency converter are exported pulse LF1, LF2 that is directly proportional with active energy and pulse LF3, the LF4 that is directly proportional with reactive energy respectively.
Digital processing circuit is made up of power factor phase measuring circuit, power, electric energy measurement circuit, frequency measurement circuit and electric current, tension measuring circuit in the utility model.Multi-functional input end on range shift switch and the range shift switch is at least two.Display can be LED or LCD.Keyboard is single with key or multiplexing key.
The utility model uses the method for measuring active power (electric energy) to measure in-phase component in mutual inductor in-phase component and quadrature component measurement; Use the method for measuring reactive power (electric energy) to measure quadrature component.This method no longer needed respectively 90 ° and 0 ° of moment, and the in-phase component of extraction potential difference and quadrature component have reduced frequency change and wave form distortion to influence of measurement error.Simultaneously, in-phase component and quadrature component do not have independent value standard, can only trace to the source to mutual inductor tester whole sports school experiment device, and the highest precision of this whole calibration equipment is 0.2 grade, present mutual-inductor tester is up to 1.0 grades, only is applicable to the calibrating of mutual inductor.If the standard mutual inductor tester that the production precision is higher just can't be traced to the source.Use the mutual-inductor tester of the utility model manufacturing, can directly trace the benchmark of active power (W), reactive power (Var), electric current (A) and voltage (V), precision can reach 0.002 grade.Like this, just there is not technical matters in production high precision mutual-inductor tester.And this mutual-inductor tester not only can the verification mutual inductor, and can measure electric current, voltage, impedance, admittance, inductance, electric capacity, power, electric energy.
The invention has the beneficial effects as follows: use power measurement method to measure transformer error, can not only reduce frequency change and wave form distortion influence to measuring accuracy, can directly trace higher reference of accuracy, and can realize an instrument multiple use, such as, realize that mutual inductor and electric energy meter use same mutual-inductor electric energy meter tester to carry out verification, mutual inductor and electric energy meter are two kinds of instruments that consumption is very big, if use same instrument calibrating, will bring convenience.
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is circuit theory diagrams of the present invention.
Among Fig. 1: IP, IN are multi-functional input ends; VP, VN are another multi-functional input ends;
Figure Y20062000798200051
Figure Y20062000798200052
Figure Y20062000798200053
Figure Y20062000798200054
It all is the vector of electric current and voltage; 1 and 2 all is range shift switch, switches the amount of two mouth inputs respectively; The 3rd, electric energy, frequency converter; The 4th, the calibration impulse generator; The 5th, keyboard; The 6th, printer; The 7th, host computer; The 8th, display; ADC is an analog/digital converter; VB is a reference voltage; DSP is a digital processing circuit; F. Φ is the power factor phase measuring circuit; W.H is power, electric energy measurement circuit; HZ is a frequency measurement circuit; V.A is electric current, tension measuring circuit; CF1 and CF2 are specially as the pulse of the usefulness of calibration; The pulse that LF1, LF2 output is directly proportional with active energy; The pulse that LF3, LF4 output is directly proportional with reactive energy.
First input end (IP, IN) is a multi-functional input end, among the figure
Figure Y20062000798200055
Figure Y20062000798200056
Figure Y20062000798200057
Figure Y20062000798200058
All be the vector of electric current and voltage, can use range switch 1 to switch mutually;
Figure Y20062000798200059
Be the secondary current of current transformer input, the electric current of importing when the electric current of power, the input of electric energy meter current return or measurement impedance or inductance; Can make Current Transformer (or clamp current transformer) input, also can use the shunt input. Be voltage transformer (VT) secondary voltage input circuit, the voltage of importing when the voltage of power, the input of electrical energy meter electricity hydraulic circuit or measurement admittance or electric capacity; Can import by the working voltage mutual inductor, also can use the input of voltage divider or sample resistance.
Figure Y200620007982000511
Be the difference stream of input current transformer, the electric current of importing when perhaps measuring admittance or electric capacity; Can make Current Transformer (or clamp current transformer) input, also can use the shunt input.
Figure Y200620007982000512
Be the differential pressure of input voltage mutual inductor, the voltage of importing when perhaps measuring impedance or inductance; Can import by the working voltage mutual inductor, also can use the input of voltage divider or sample resistance.Simultaneously, we also can use sample resistance, and voltage transitions is become electric current, and perhaps with current conversion voltage, this all is the ultimate principle that the principles of electric and electronic engineering were described, as long as the resistance that uses can guarantee that precision is just passable.
Second input end (VP, VN) is another multi-functional input end, and it and first input end are same input ends, and its input quantity can use range switch 2 to switch mutually; Two input ends should keep following corresponding relation: when the calibrating current transformer, an input end is
Figure Y200620007982000513
Another input end is
Figure Y200620007982000514
When the calibrating voltage transformer (VT), an input end is
Figure Y200620007982000515
Another input end is
Figure Y200620007982000516
When calibration power table, electric energy meter, an input end is
Figure Y200620007982000517
Another input end is
Figure Y200620007982000518
When measuring impedance and inductance, an input end is
Figure Y200620007982000519
Another input end is
Figure Y200620007982000520
When measuring admittance and electric capacity, an input end is
Figure Y200620007982000521
Another input end is
Figure Y200620007982000522
As long as meet above-mentioned corresponding relation, it all is the same using which interface, and as required, such interface can have a plurality of, because 26S Proteasome Structure and Function all is the same, so repeated description no longer.
ADC is an analog/digital converter, and electric current ADC is converted to digital quantity with the magnitude of current exactly, and voltage ADC is converted to digital quantity with voltage exactly.In fact, they are the same, because the essence of ADC analog/digital converter is a voltage/digital quantizer, electric current ADC just is to use sampling resistor, allow electric current pass through sampling resistor, measure the pressure drop of sampling resistor, utilize Ohm law that current conversion is voltage exactly, electric current ADC is exactly in fact a voltage ADC, just the sampling method difference of input end.Different amounts is converted to digital quantity, as long as we changed measured according to Ohm law, utilizes ADC that analog quantity is converted to digital quantity.Needs according to measuring can use multi-channel A/D analog/digital converter, also can use multi-disc A/D analog/digital converter, according to different measurement ranges, can use A/D built-in or add amplifier, also can use the external amplifier of A/D.Reference voltage is external reference voltage, if the built-in reference voltage precision of A/D analog/digital converter can satisfy the demand, can no longer external reference voltage.
Electric current, voltage measurement unit are mainly digital signal processing circuit, according to the needs of measuring accuracy and environment for use, can use digital signal processing DSP, also can not use digital signal processing DSP.At this moment, effective value can be obtained, also vector can be obtained
Figure Y20062000798200061
With
Figure Y20062000798200062
Power, electric energy measurement unit are mainly digital multiplication or analog multiplier, and signal processing circuit, according to the needs of measuring accuracy and environment for use, can use digital signal processing DSP, also can not use digital signal processing DSP.Power factor phase measurement unit carries out power factor and Phase Processing to signal; The main survey frequency of frequency measurement unit; Work as current vector
Figure Y20062000798200063
With voltage vector
Figure Y20062000798200064
When multiplying each other, the result is exactly a power, and in-phase component simply says to be exactly the component identical with the reference variable phase place; In-phase component is proportional to active power W = U · × I · × CosΦ Work as current vector
Figure Y20062000798200067
With voltage vector
Figure Y20062000798200068
Between phase angle Φ=0 ° the time, Cos Φ=1, at this moment, W = U · × I · × CosΦ = U · × I · , In-phase component and current vector
Figure Y200620007982000611
Voltage vector
Figure Y200620007982000612
Equate and active power is directly proportional.So-called quadrature component, be exactly and the reference variable perpendicular amount of phasic difference mutually, just with reference variable mutually phasic difference differ 90 ° amount, quadrature component is proportional to reactive power
Figure Y200620007982000613
Work as current vector
Figure Y200620007982000615
With voltage vector
Figure Y200620007982000616
Between phase angle Φ=90 ° the time, Cos Φ=0, at this moment, W = U · × I · × CosΦ = 0 , At this moment, real component equals 0; Work as current vector
Figure Y200620007982000618
With voltage vector
Figure Y200620007982000619
Between phase angle Φ=90 ° the time, Sos Φ=1, at this moment,
Figure Y200620007982000620
At this moment quadrature component and current vector
Figure Y200620007982000622
Voltage vector
Figure Y200620007982000623
Equate and reactive power is directly proportional.This shows, can measure in-phase component with the method for measuring active power fully; Also can measure quadrature component with the method for measuring reactive power.The electric energy measurement unit to time integral, or multiply by the time with power with power, and this can be finished by the electric energy measurement unit in the chip, also can be finished by single-chip microcomputer, or be finished by the Pc machine.Electric energy-pulse converter is exactly that value with electric energy converts frequency and the proportional pulse of electric energy to, the pulse that LF1, LF2 output is directly proportional with active energy; The pulse that LF3, LF4 output is directly proportional with reactive energy; The calibration impulse generator generates calibration pulse CF1 and CF2, specially as the usefulness of calibration.By communication port signal is delivered to CPU, CPU can use single-chip microcomputer, also can use industrial computer; CPU with data processing after, deliver to LED nixie display or LCD liquid crystal display displays, send printer prints.Also can connect machine, or be connected, or send printer prints with data transmission system by communication port and host computer.
These functions can be integrated in one or several chip, perhaps use chip and elements combination with corresponding function to form, and this does not influence enforcement of the present invention.Above-mentioned functions and method are essentially identical in the present invention, no longer repeat among the embodiment afterwards.
Fig. 2 is first embodiment: the circuit theory diagrams of current transformer calibrating.
Among Fig. 2: CT xBe tested current transformer, CT 0It is standard current transformer.T 1Be adjustable transformer, be used for adjusting the electric current of rising current transformer output; T 2Be rising current transformer, be used to provide electric current, Z is the current loading case, is used for providing load to tested current transformer.T xBe the input end of tested current transformer, this terminals ground connection.T 0It is the input end of standard current transformer.K is that the input of difference stream is high-end, and D is a difference stream input low side, through shielding line ground connection.
L And L X2Be once (elementary) terminals of tested current transformer, K X1And K X2Be tested Current Transformer Secondary (secondary) terminals; L And L O2Be once (elementary) terminals of standard current transformer, K O1And K O2Be standard current transformer secondary (secondary) terminals.
Tested current transformer is (elementary) terminals L once With standard current transformer (elementary) terminals L once Connect, tested current transformer is (elementary) terminals L once X2With standard current transformer (elementary) terminals L once O2, be connected with two current output terminals of current lifting device respectively;
Tested Current Transformer Secondary (secondary) terminals K With standard current transformer secondary (secondary) terminals K Connect, connect a lead K thus, the other end of K line connects the K terminals of tester, and the D terminals are through shielding line ground connection; Tested Current Transformer Secondary (secondary) terminals K X2After inserting the current loading case, be connected to the T of tester xTerminals, standard current transformer secondary (secondary) terminals K O2Be connected to the T of tester 0Terminals.
When the output winding of a current lifting device winding by current transformer adds to current transformer with circuit, the working current of Current Transformer Secondary
Figure Y20062000798200071
Pass through T x, T 0Terminals are access in the first input end of tester, be converted to voltage through sample resistance, because for A/D converter, what import all is voltage, various simulating signals all will be converted to voltage, input a/d converter (down together) after A/D conversion and current effective value processing, shows the secondary working current I of current transformer then; Difference stream through the input of K line
Figure Y20062000798200072
Insert second input end of tester through the K of tester terminals, be converted to voltage through sample resistance, the input validation instrument, processing through A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw active power W and reactive power Var, active power W is divided by working current
Figure Y20062000798200073
Be the in-phase component of current transformer error, again divided by working current
Figure Y20062000798200074
Multiply by 100, be the ratio f (percentage of the relative error of current transformer) of current transformer.Reactive power Var is divided by working current Be the quadrature component of current transformer error, again divided by working current
Figure Y20062000798200076
Multiply by 100, be the angular difference δ (percentage of the relative error of current transformer) of current transformer if angular difference δ be multiply by 34.38 again, then the angular difference δ of current transformer becomes branch (').
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester calibrating current transformer, the electric weight that invention relates to
Figure Y20062000798200077
Figure Y20062000798200078
Figure Y20062000798200079
Figure Y200620007982000710
Metering circuit and device ADC are analog/digital converter, electric current, voltage measurement unit, digital signal processing DSP, adjustable transformer, rising current transformer etc., the terminals T of tester 0, T x, K, D, the terminals L of current transformer , L X2, K X1, K X2, L , L O2, K O1, K O2Deng circuit, device, vocabulary of terms all is that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, designs various scheme.Because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Fig. 3 is second embodiment: the circuit theory diagrams of voltage transformer (VT) calibrating.
Among Fig. 3: PT xBe tested voltage transformer (VT), PT 0It is standard potential transformer.T 1Be adjustable transformer, be used for adjusting the voltage of step-up transformer output; T 2Be step-up transformer, be used to provide voltage, Y is a voltage load box, is used for providing load to tested voltage transformer (VT).A is the high input end of voltage transformer secondary (secondary), and x is the low input end of voltage transformer secondary (secondary).K is that the input of differential pressure is high-end, and D is a differential pressure input low side, through shielding line ground connection.
A XAnd X XBe once (elementary) terminals of tested voltage transformer (VT), a XAnd x XBe tested voltage transformer secondary (secondary) terminals; A OAnd X OBe once (elementary) terminals of standard potential transformer, a OAnd x OBe standard potential transformer secondary (secondary) terminals.
Tested voltage transformer (VT) is (elementary) terminals A once XWith standard potential transformer (elementary) terminals A once OConnect, and be connected with an end of stepup transformer; Tested voltage transformer (VT) is (elementary) terminals X once XWith standard potential transformer (elementary) terminals X once OConnect, and be connected with the other end of stepup transformer.Tested voltage transformer secondary (secondary) terminals a XWith standard potential transformer secondary (secondary) terminals a OConnect, and be connected with the connection terminal a of tester; Standard potential transformer secondary (secondary) terminals x OBe connected with the connection terminal x of tester; And by x OConnect a lead K, the other end of K line connects the K terminals of tester; Tested voltage transformer secondary (secondary) terminals x XBe connected tested voltage transformer secondary (secondary) terminals a with the K terminals D of tester XAnd x XBetween the voltage load box Y that inserts in parallel.
When the output winding of a stepup transformer winding by voltage transformer (VT) adds to voltage transformer (VT) with circuit, the operating voltage of voltage transformer secondary
Figure Y20062000798200081
Pass through a OAnd x OTerminals are access in the second input end (a of tester, x), behind divider resistance changing voltage range, because for A/D converter, what import all is voltage, and various simulating signals all will be converted to voltage, then input a/d converter (down together), after A/D conversion and voltage effective value processing, the secondary operating voltage U of display voltage mutual inductor; Differential pressure through the input of K line
Figure Y20062000798200082
Insert the first input end of tester through the K of tester terminals, behind divider resistance changing voltage range, the input validation instrument, processing through A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw active power W and reactive power Var, active power W is divided by operating voltage
Figure Y20062000798200083
Be the in-phase component of voltage transformer error, again divided by operating voltage
Figure Y20062000798200084
Multiply by 100, be the ratio f (percentage of the relative error of voltage transformer (VT)) of voltage transformer (VT).Reactive power Var is divided by operating voltage
Figure Y20062000798200085
Be the quadrature component of voltage transformer error, again divided by operating voltage
Figure Y20062000798200086
Multiply by 100, be the angular difference δ (percentage of the relative error of current transformer) of current transformer if angular difference δ be multiply by 34.38 again, then the angular difference δ of electric mutual inductor becomes branch (').
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester calibrating voltage transformer (VT), the electric weight that relates in the invention
Figure Y20062000798200087
Figure Y20062000798200088
Figure Y20062000798200089
Figure Y200620007982000810
Metering circuit and device ADC are analog/digital converter, electric current, voltage measurement unit, digital signal processing DSP etc., terminals a, the x of tester, K, D, the terminals A of voltage transformer (VT) X, X X, a X, x X, A O, X O, a O, x ODeng circuit, device, vocabulary of terms all is that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, designs various scheme., because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Fig. 4 is the 3rd embodiment: be used for the circuit theory diagrams that impedance (comprising impedance case, current loading case etc.) is measured.
Among Fig. 4: Z is tested impedor.T 1Be adjustable transformer, be used for adjusting the electric current of rising current transformer output; T 2Be rising current transformer, be used to provide electric current.T xBe the input end of tested current transformer, T 0Be the input end of standard current transformer, T xAnd T 0It also is the input end of the electric current of impedance.K is that the input of differential pressure is high-end, and D is a differential pressure input low side, through shielding line ground connection.
Z And Z 2Be two terminals of tested impedor.
One terminals Z of tested impedor Be connected with an end of current lifting device, and by Z Connect a lead K, the other end of K line connects the K terminals of tester; Another terminals Z of tested impedor 2T with tester OTerminals connect; And by Z 2Connect a lead D, the other end of D line connects the D terminals of tester; The other end of current lifting device and the T of tester xEnd links to each other.
When the output winding of current lifting device applies electric current for tested impedor Z, electric current Pass through T x, T 0Terminals are access in the first input end of tester, be converted to voltage through sample resistance, because for A/D converter, what import all is voltage, various simulating signals all will be converted to voltage, input a/d converter (down together) after A/D conversion and current effective value processing, shows the electric current I that tested impedor Z passes through then; Voltage through the input of K line
Figure Y20062000798200092
Insert second input end of tester through the K of tester terminals, behind divider resistance conversion range, the input validation instrument, processing through A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw active power W and reactive power Var, active power W is divided by working current
Figure Y20062000798200093
Be voltage
Figure Y20062000798200094
Again divided by working current
Figure Y20062000798200095
Be the in-phase component R of tested impedor Z.Reactive power Var is divided by working current
Figure Y20062000798200096
Be voltage
Figure Y20062000798200097
Again divided by working current
Figure Y20062000798200098
Be the quadrature component X of tested impedor Z.
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester to measure impedor, the electric weight that relates in the invention
Figure Y20062000798200099
Figure Y200620007982000910
Figure Y200620007982000911
R, X, metering circuit and device ADC are analog/digital converter, electric current, voltage measurement unit, digital signal processing DSP etc., terminals a, the x of tester, K, D, the terminals Z of impedance And Z 2Deng circuit, device, vocabulary of terms all is that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, designs various scheme.Because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Fig. 5 is the 4th embodiment: be used for the circuit theory diagrams that admittance (comprising electric guide box, voltage load box etc.) is measured.
Among Fig. 5: Y is tested admittance, T 1Be adjustable transformer, be used for adjusting the voltage of step-up transformer output; T 2Be step-up transformer, be used to provide voltage.A is the high input end of voltage transformer secondary (secondary), and x is the low input end of voltage transformer secondary (secondary).A and x are also by the voltage input end of school admittance.K is that the input of difference stream is high-end, and D is a difference stream input low side, through shielding line ground connection.
Y 1And Y 2Be two terminals of tested admittance.
A terminals Y of tested admittance 1Link to each other with an end of stepup transformer, and be connected with the connection terminal a of tester; Again by Y 2Connect a lead K, the other end of K line connects the K terminals of tester; The other end of stepup transformer is connected with the connection terminal x of tester, and draws a shielded conductor D, is connected with the K terminals D of tester.
When the output winding of stepup transformer applies voltage, operating voltage
Figure Y200620007982000912
Second input end that a and x terminals by tester are access in tester, behind divider resistance changing voltage range, because for A/D converter, what import all is voltage, various simulating signals all will be converted to voltage, input a/d converter (down with) then, after A/D conversion and voltage effective value processing, the operating voltage U of demonstration; Electric current through the input of K line Insert the first input end of tester through the K of tester terminals, after sampling resistor is converted to voltage, the input validation instrument, processing through A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw active power W and reactive power Var, active power W is divided by operating voltage
Figure Y20062000798200101
Be working current
Figure Y20062000798200102
Again divided by operating voltage
Figure Y20062000798200103
Be the in-phase component G of admittance.Reactive power Var is divided by operating voltage
Figure Y20062000798200104
Operating voltage
Figure Y20062000798200105
Be working current Remove the quadrature component B that is admittance again.
Below by the agency of a kind of design proposal of tester, it has satisfied and uses tester to measure the requirement of admittance, the electric weight that relates in the invention
Figure Y20062000798200108
Figure Y20062000798200109
Figure Y200620007982001010
G, B, terminals a, the x of tester, K, D, the terminals Y of admittance 1, Y 2Deng circuit, device, vocabulary of terms all is that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, designs various scheme.Because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Fig. 6 is the 5th embodiment: be used for the circuit theory diagrams that inductance (comprising inductance box, inductance bridge etc.) is measured.
Among Fig. 6: L is measured inductance.T 1Be adjustable transformer, be used for adjusting the electric current of rising current transformer output; T 2Be rising current transformer, be used to provide electric current.T xBe the input end of tested current transformer, T 0Be the input end of standard current transformer, T xAnd T 0Also by the current input terminal of school inductance.K is that the input of differential pressure is high-end, and D is a differential pressure input low side, through shielding line ground connection.
L And L 2Be two terminals of measured inductance.
One terminals L of measured inductance Be connected with an end of current lifting device, and by L Connect a lead K, the other end of K line connects the K terminals of tester; Another terminals L of measured inductance 2T with tester 0Terminals connect; And, and by L 2Connect a lead D, the other end of D line connects the D terminals of tester; The other end of current lifting device and the T of tester xEnd links to each other.
When the output winding of current lifting device applies electric current for measured inductance, electric current
Figure Y200620007982001011
Pass through T x, T 0Terminals are access in the first input end of tester, be converted to voltage through sample resistance, because for A/D converter, what import all is voltage, various simulating signals all will be converted to voltage, import defeated A/D converter (down together) then, after A/D conversion and current effective value processing, show the electric current I that measured inductance L is passed through; Voltage through the input of K line
Figure Y200620007982001012
Insert second input end of tester through the K of tester terminals, behind divider resistance conversion range, the input validation instrument, processing through A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw active power W and reactive power Var, active power W is divided by working current
Figure Y200620007982001013
Operating voltage
Figure Y200620007982001014
Again divided by working current
Figure Y200620007982001015
Be the in-phase component R of measured inductance L.Reactive power Var is divided by working current
Figure Y200620007982001016
Operating voltage Again divided by working current
Figure Y200620007982001018
Be the quadrature component X of measured inductance L, quadrature component X is inductance L divided by ω.
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using the tester inductance measuring, the electric weight that relates in the invention
Figure Y200620007982001020
Figure Y200620007982001021
Figure Y200620007982001022
L, R, X, the terminals T of tester 0, T x, K, D, the terminals L of inductance And L 2Deng circuit, device, vocabulary of terms all is that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, designs various scheme., because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Fig. 7 is the 6th embodiment: be used for the circuit theory diagrams that electric capacity (comprising capacitive, capacitance bridge etc.) is measured.
Among Fig. 7: C is measured electric capacity.T 1Be adjustable transformer, be used for adjusting the voltage of step-up transformer output; T 2Be step-up transformer, be used to provide voltage.A is the high input end of voltage transformer secondary (secondary), and x is the low input end of voltage transformer secondary (secondary); A and x are also by the voltage input end of school electric capacity.K is that the input of difference stream is high-end, and D is a difference stream input low side, through shielding line ground connection.
C 1And C 2Be two terminals of detected electric capacity.
A terminals C of tested electric capacity XLink to each other with an end of stepup transformer, and be connected with the connection terminal a of tester; Again by C 2Connect a lead K, the other end of K line connects the K terminals of tester; The other end of stepup transformer is connected with the connection terminal x of tester, and draws a shielded conductor D, and D is connected with the tester terminals.
When the output winding of stepup transformer applies voltage, operating voltage
Figure Y20062000798200111
Second input end that a and x terminals by tester are access in tester, behind divider resistance changing voltage range, because for A/D converter, what import all is voltage, various simulating signals all will be converted to voltage, import defeated A/D converter (down together) then, after A/D conversion and voltage effective value processing, the secondary operating voltage U of display voltage mutual inductor; Electric current through the input of K line
Figure Y20062000798200112
Insert the first input end of tester through the K of tester terminals, after sampling resistor is converted to voltage, the input validation instrument, processing through A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw active power W and reactive power Var, active power W is divided by operating voltage
Figure Y20062000798200113
Be working current
Figure Y20062000798200114
Again divided by operating voltage
Figure Y20062000798200115
Be the in-phase component G of admittance.Reactive power Var is divided by operating voltage
Figure Y20062000798200116
Be working current
Figure Y20062000798200117
Again divided by operating voltage
Figure Y20062000798200118
Be the quadrature component B of admittance, quadrature component B is capacitor C divided by ω.
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester to measure electric capacity, the electric weight that relates in the invention
Figure Y20062000798200119
Figure Y200620007982001110
G, B, terminals a, the x of tester, K, D, the terminals Y of admittance 1, Y 2Deng circuit, device, vocabulary of terms all is that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, designs various scheme., because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Fig. 8 is the 7th embodiment: the single-phase power that is used for, the circuit theory diagrams of electric energy meter calibration.
The calibrating of electric energy meter and verification mainly contain two kinds of methods:
A kind of is the virtual load method, is mainly used in off-line (promptly leaving the supply line of electrical network) verification, the calibrating of power, electric energy meter;
Another kind is real load method: online the supply line of electrical network (even the with) verification, the calibrating that are mainly used in power, electric energy meter;
The existing suitable first method of making according to the utility model of tester, (down with) of suitable second method also arranged.
Among Fig. 8: Wh xBy school single-phase power, electric energy meter; Current return I is the circuit that electric current is provided to single-phase power, electric energy meter, and terminals are I 1, I 2Voltage circuit U is the circuit that voltage is provided to single-phase power, electric energy meter, and terminals are U 1, U 2By the current terminal of school single-phase power, electric energy meter is I 1x, I 2XVoltage terminal is U 1x, U 2XI 1P, I 1NBy the current input terminal of school single-phase power, electric energy meter; U 1P, U 1NIt is the voltage input end of tested single-phase power, electric energy meter.
By the current terminal I of school single-phase power, electric energy meter 1xTerminals I with current return 1Connect; By the current terminal of school single-phase power, electric energy meter is I 2xTerminals I with tester 1PConnect; The terminals I of tester 1NConnect terminals I with current return 2Connect.The voltage terminal U of tested single-phase power, electric energy meter 1xTerminals U with tester 1PConnect, and be U with the terminals of voltage circuit simultaneously 1Connect; The voltage terminal U of electric energy meter 2xTerminals U with tester 1NConnect, and be U with the terminals of voltage circuit simultaneously 2Connect.
When current return and voltage circuit to by school single-phase power, electric energy meter power supply the time, electric current is directly or through current transformer (or forcipated mutual-inductor), the first input end I of input validation instrument 1P, I 1N, be converted to voltage through sampling resistor because for A/D converter, input all be voltage, various simulating signals all will be converted to voltage; Input a/d converter (down together) after A/D conversion and current effective value processing, shows the working current I of tested single-phase power, electric energy meter then; When current return and voltage circuit during to tested single-phase power, electric energy meter power supply, voltage is directly or through voltage transformer (VT), the second input end U of input validation instrument 2P, U 2N, be converted to voltage through sample resistance.Processing (showing operating voltage U) through A/D conversion and power measurement unit at display, the simplest processing is exactly that the first input end and second input end multiply each other, draw active power W, with reactive power Var, applied power VA is with the demonstration active power W and the reactive power Var of tested single-phase power, electric energy meter, applied power VA compares respectively, just can draw corresponding error.With power transfer is proportional pulse, and active energy is by LF1, LF2 output, and reactive energy is by LF3, LF4 output, and accumulative total reads active energy Wh, the reactive energy Varh that pulse can calculate corresponding calibrated meter.With (be that tested table and standard scale begin simultaneously, finish simultaneously by school single-phase power, same period of electric energy meter, promptly with by the start-stop of the Pulse-trigger control tester impulse meter of school single-phase power, electric energy meter, down together) electric energy of accumulative total is compared, and just can calculate electric energy error.Also can power to the time T integration, or power and time T multiplied each other, send register with the result, read the value of register, compare with the electric energy of period accumulative total with tested single-phase power, electric energy meter, just can calculate the electric energy error of calibrated meter.Calibration pulse CF1, CF2 are used for standard is carried out verification.
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester verification single-phase power, electric energy meter, the electric weight that relates in the invention
Figure Y20062000798200122
W, Var, Wh, Varh and time quantum T, metering circuit and device ADC are analog/digital converter, electric current, voltage measurement unit, digital signal processing DSP etc., the terminals U of tester 1P, U 1N, I 1P, I 1N.The current terminal of power, electric energy meter is I 1x, I 2XVoltage terminal is U 1x, U 2XDeng.These circuit, device, vocabulary of terms all are that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, design various scheme., because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Fig. 9 is a kind of scheme of the 8th embodiment: the circuit theory diagrams that are used for many single-phase powers, electric energy meter calibration.
Among Fig. 9: current return I is the circuit that electric current is provided to single-phase power, electric energy meter, and terminals are I 1, I 2Voltage circuit U is the circuit that voltage is provided to single-phase power, electric energy meter, and terminals are U 1, U 2First tested single-phase power, electric energy meter are Wh X1, its current terminal is I 1x, I 2XVoltage terminal is U 1x, U 2X, second tested single-phase power, electric energy meter are Wh X2, its current terminal is I 21x, I 22XVoltage terminal is U 21x, U 22X..., the only tested single-phase power of N, electric energy meter are Wh XN, its current terminal is I N1x, I N2XVoltage terminal is U N1x, U N2X
Isolated voltage transformer PT is used for isolating the voltage circuit and the current return of tested single-phase power, electric energy meter, and its primary connection end is A and X; Its secondary connection end, first winding are 1a, 1x; Second winding is 2a, 2x; N winding is Na, Nx.
In the connection terminal of the tester of making according to the present invention, I 11P, I 11NBe the current input terminal of tested single-phase power, electric energy meter, U 11P, U 11NIt is the voltage input end of tested single-phase power, electric energy meter.The current terminal of first tested single-phase power, electric energy meter is I 1xTerminals I with current return 1Connect, the current terminal of first tested single-phase power, electric energy meter is I 2xCurrent terminal I with second tested single-phase power, electric energy meter 21xConnect; The current terminal I of second tested single-phase power, electric energy meter 22XCurrent terminal I with the only tested single-phase power of N, electric energy meter N1N, the current terminal I of the only tested single-phase power of N, electric energy meter N2XTerminals I with tester 11PConnect; The I of tester 11NTerminals I with current return 2Connect.The U of voltage circuit 1With the primary connection end of isolated voltage transformer PT is that A is connected; Voltage circuit terminals U 2With the primary connection end of isolated voltage transformer PT is that X is connected; The voltage terminal U of first tested single-phase power, electric energy meter 1xTerminals U with tester 11PConnect, and be connected with the secondary connection end 1a of isolated voltage transformer PT simultaneously; The voltage terminal U of first tested single-phase power, electric energy meter 2xBe connected with the secondary connection end 1x of isolated voltage transformer PT, and be U simultaneously with the terminals of tester 11NConnect; The voltage terminal U of second tested single-phase power, electric energy meter 21xBe connected with the secondary connection end 1a of isolated voltage transformer PT; The voltage terminal U of second tested single-phase power, electric energy meter 22xBe connected with the secondary connection end 2x of isolated voltage transformer PT; The voltage terminal U of the only tested single-phase power of N, electric energy meter N1xBe connected with the secondary connection end Na of isolated voltage transformer PT; The voltage terminal U of the only tested single-phase power of N, electric energy meter N2xBe connected with the secondary connection end Nx of isolated voltage transformer PT.
When current return and voltage circuit during to tested single-phase power, electric energy meter power supply, electric current is directly or through the first input end I of current transformer (or forcipated mutual-inductor) input validation instrument 1P, I 1N, be converted to voltage through sampling resistor, because for A/D converter, what import all is voltage, and various simulating signals all will be converted to voltage, then input a/d converter (down together), after A/D conversion and current effective value processing, show the working current I of tested single-phase power, electric energy meter; When current return and voltage circuit during to tested single-phase power, electric energy meter power supply, voltage is directly or through the second input end U of voltage transformer (VT) input validation instrument 2P, U 2NBe converted to voltage through sample resistance, through the processing (showing operating voltage U at display) of A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, and draws active power W, with reactive power Var, applied power VA is with the demonstration active power W and the reactive power Var of tested single-phase power, electric energy meter, applied power VA compares respectively, just can draw corresponding error.With power transfer is proportional pulse, and accumulative total reads active energy Wh, the reactive energy Varh that pulse can calculate corresponding tested table.Active energy is exported by LF1, LF2, reactive energy is exported by LF3, LF4, with tested single-phase power, same period of electric energy meter (be that tested table and standard scale begin simultaneously, finish simultaneously, promptly with by the start-stop of the Pulse-trigger control tester impulse meter of school single-phase power, electric energy meter, down together) electric energy of accumulative total is compared, and just can calculate electric energy error.Also can power to the time T integration, or power and time T multiplied each other, send register with the result, read the value of register, compare with the electric energy of period accumulative total with tested single-phase power, electric energy meter, just can calculate the electric energy error of tested table, for many single-phase powers of while verification, electric energy meter, method is the same, as long as it is just passable to calculate the error of each tested single-phase power, electric energy meter respectively.
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester calibrating single-phase power, electric energy meter, the electric weight that relates in the invention
Figure Y20062000798200141
Figure Y20062000798200142
W, Var, Wh, Varh and time quantum T, the terminals I of tester 11P, I 11N, U 11P, U 11NThe current terminal I of power, electric energy meter 1x, I 2X, I 21x, I 22X, I N1x, I N2XVoltage terminal U 1x, U 2X, U 21x, U 22X, U N1x, U N2XDeng; The primary connection end of isolated voltage transformer PT is A and X, secondary connection end winding 1a, 1x; 2a, 2x; Na, Nx etc.
These circuit, device, vocabulary of terms all are that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, design various scheme., because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Figure 10 is a kind of scheme of the 9th embodiment: the circuit theory diagrams that are used for many single-phase powers, electric energy meter calibration.
Among Figure 10: current return I is the circuit that electric current is provided to single-phase power, electric energy meter, and terminals are I 1, I 2Voltage circuit U is the circuit that voltage is provided to single-phase power, electric energy meter, and terminals are U 1, U 2First tested single-phase power, electric energy meter are Wh X1, its current terminal is I 1x, I 2XVoltage terminal is U 1x, U 2X, second tested single-phase power, electric energy meter are Wh X2, its current terminal is I 21x, I 22XVoltage terminal is U 21x, U 22X..., the only tested single-phase power of N, electric energy meter are Wh XN, its current terminal is I N1x, I N2XVoltage terminal is U N1x, U N2X
Isolated voltage transformer PT is used for isolating the voltage circuit and the current return of tested single-phase power, electric energy meter, and its primary connection end is A and X; Its secondary connection end, first winding are 1a, 1x; Second winding is 2a, 2x; N winding is Na, Nx.
Isolation current transformer CT is used for isolating the voltage circuit and the current return of tested single-phase power, electric energy meter, and its primary connection end is L 1And L 2Its secondary connection end, first winding are 1K 1, 1K 2Second winding is 2K 1, 2K 2N winding is NK 1, NK 2
In the connection terminal of the tester of making according to the present invention, I 11P, I 11NBe the current input terminal of first tested single-phase power, electric energy meter, U 11P, U 11NIt is the voltage input end of first tested single-phase power, electric energy meter.I 21P, I 21NIt is the current input terminal of second tested single-phase power, electric energy meter; U 21P, U 21NIt is the voltage input end of second tested single-phase power, electric energy meter; I N1P, I N1NBe the current input terminal of the only tested single-phase power of N, electric energy meter, U N1P, U N1NIt is the voltage input end of the only tested single-phase power of N, electric energy meter.
The terminals I of current return I 1With the terminals L that isolates current transformer CT 1Connect; The terminals I of current return I 2With the terminals L that isolates current transformer CT 2Connect; The current terminal of first tested single-phase power, electric energy meter is I 1xWith the terminals 1K that isolates current transformer 1Connect, the current terminal of first tested single-phase power, electric energy meter is I 2xI with tester 11PTerminals connect, the I of tester 11NTerminals and isolation current transformer terminals 1K 2Connect; The current terminal of second tested single-phase power, electric energy meter is I 21xWith the terminals 2K that isolates current transformer 1Connect,, the current terminal of second tested single-phase power, electric energy meter is I 22xI with tester 21PTerminals connect; The I of tester 21NTerminals and isolation current transformer terminals 2K 2Connect; The current terminal of the only tested single-phase power of N, electric energy meter is I N1xWith the terminals NK that isolates current transformer 1Connect,, the current terminal of the only tested single-phase power of N, electric energy meter is I N2xI with tester N1PTerminals connect; The I of tester N1NTerminals and isolation current transformer terminals NK 2Connect.The terminals U of voltage circuit U 1With the primary connection end of isolated voltage transformer PT is that A is connected; Voltage circuit terminals U 2With the primary connection end of isolated voltage transformer PT is that X is connected; The voltage terminal U of first tested single-phase power, electric energy meter 1xTerminals U with tester 11PConnect, and be connected with the secondary connection end 1a of isolated voltage transformer PT simultaneously; The voltage terminal U of first tested single-phase power, electric energy meter 2xBe connected with the secondary connection end 1x of isolated voltage transformer PT, and be U simultaneously with the terminals of tester 11NConnect; The voltage terminal U of second tested single-phase power, electric energy meter 21xTerminals U with tester 21PConnect, and be connected with the secondary connection end 1a of isolated voltage transformer PT simultaneously; The voltage terminal U of second tested single-phase power, electric energy meter 22xBe connected with the secondary connection end 2x of isolated voltage transformer PT, and be U simultaneously with the terminals of tester 21NConnect; The voltage terminal U of the only tested single-phase power of N, electric energy meter N1xTerminals U with tester N1PConnect, and be connected with the secondary connection end Na of isolated voltage transformer PT simultaneously; The voltage terminal U of the only tested single-phase power of N, electric energy meter N2xBe connected with the secondary connection end Nx of isolated voltage transformer PT, and be U simultaneously with the terminals of tester N1NConnect.
When current return and voltage circuit during to tested single-phase power, electric energy meter power supply, electric current is directly or through the first input end I of current transformer (or forcipated mutual-inductor) input validation instrument 1P, I 1NBe converted to voltage through sampling resistor, because for A/D converter, what import all is voltage, various simulating signals all will be converted to voltage, and the defeated A/D converter of input (down together) is gone into tester then, after A/D conversion and current effective value processing, show the working current I of tested single-phase power, electric energy meter; When current return and voltage circuit during to tested single-phase power, electric energy meter power supply, voltage is directly or through the second input end U of voltage transformer (VT) input validation instrument 2P, U 2NBe converted to voltage through sample resistance, through the processing (showing operating voltage U at display) of A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, and draws active power W, with reactive power Var, applied power VA is with the demonstration active power W and the reactive power Var of tested single-phase power, electric energy meter, applied power VA compares respectively, just can draw corresponding error.With power transfer is proportional pulse, and accumulative total reads active energy Wh, the reactive energy Varh that pulse can calculate corresponding tested table.With tested single-phase power, same period of electric energy meter (be that tested table and standard scale begin simultaneously, finish simultaneously, promptly with by the start-stop of the Pulse-trigger control tester impulse meter of school single-phase power, electric energy meter, down together) electric energy of accumulative total is compared, and just can calculate electric energy error.Also can power to the time T integration, or power and time T multiplied each other, send register with the result, read the value of register, compare with the electric energy of period accumulative total with tested single-phase power, electric energy meter, just can calculate the electric energy error of tested table, for many single-phase powers of while verification, electric energy meter, method is the same, as long as it is just passable to calculate the error of each tested single-phase power, electric energy meter respectively; Simultaneously, tester according to the utility model manufacturing, a power, electric energy measurement element are used in the position of each tested single-phase power, electric energy meter, and the tester that uses at present only uses a power, electric energy measurement element, in different tested single-phase powers, electric energy meter position, error can be had any different, tester according to the utility model manufacturing, all use a power, electric energy measurement element in the position of each tested single-phase power, electric energy meter, effectively solved in different tested single-phase powers, electric energy meter position, error can distinguishing problem.
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester calibrating single-phase power, electric energy meter, the electric weight that relates in the utility model
Figure Y20062000798200151
Figure Y20062000798200152
W, Var, Wh, Varh and time quantum T, the terminals I of tester 11P, I 11N, U 11P, U 11N, I 21P, I 21N, U 21P, U 21N, I N1N, I N1N, U N1P, U N1NThe current terminal I of power, electric energy meter 1x, I 2X, I 21x, I 22X, I N1x, I N2XVoltage terminal U 1x, U 2X, U 21x, U 22X, U N1x, U N2XDeng; The primary connection end of isolated voltage transformer PT is A and X, secondary connection end winding 1a, 1x; 2a, 2x; Na, Nx etc.; The primary connection end of isolating current transformer CT is L 1And L 2Its secondary connection end 1K 1, 1K 2, 2K 1, 2K 2NK 1, NK 2Deng.
These circuit, device, vocabulary of terms all are that this professional those of ordinary skill is known, short of category of the present utility model and the spirit left, can make various changes and replacement, design various scheme, such as also designing the tester that is used for three phase power, electric energy meter.Because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Figure 11 is a kind of scheme of the tenth embodiment: the circuit theory diagrams that are used to use real load method field-checking single-phase power, electric energy meter.
Among Figure 11: electric power loop DY is the supply line that electric energy is provided to the user, is made up of live wire and zero line; The terminals of live wire are A, and the terminals of zero line are N, and load Z uses employed load; The user measures tested single-phase power, the electric energy meter of electric energy, and its current terminal is 1,2,3,4,5.
I 1P, I 1NBe tested single-phase power, electric energy meter Wh XCurrent input terminal, U 1P, U 1NIt is the voltage input end of tested single-phase power, electric energy meter.
Tested single-phase power, electric energy meter Wh xCurrent terminal 1 with the terminals I of tester 1NConnect the terminals A of electric power loop and the terminals I of tester 1PConnect tested single-phase power, electric energy meter Wh xCurrent terminal 3 is connected with load Z, tested single-phase power, electric energy meter Wh xThe terminals U of voltage terminal 2 and tester 1PConnect electric energy meter Wh xThe terminals U of voltage terminal 4 and tester 1NConnect, and be that N is connected with the terminals of electric power loop simultaneously; Tested single-phase power, electric energy meter Wh xVoltage terminal 5 is connected with load Z.
When current return and voltage circuit during to tested single-phase power, electric energy meter power supply, electric current is directly or through the first input end I of current transformer (or forcipated mutual-inductor) input validation instrument 1P, I 1N, be converted to voltage through sampling resistor, because for A/D converter, what import all is voltage, and various simulating signals all will be converted to voltage, then input a/d converter (down together), after A/D conversion and current effective value processing, show the working current I of tested single-phase power, electric energy meter; When current return and voltage circuit during to tested single-phase power, electric energy meter power supply, voltage is directly or through the second input end U of voltage transformer (VT) input validation instrument 2P, U 2NBe converted to voltage through sample resistance, the input validation instrument is through the processing of A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw active power W and reactive power Var, applied power VA, demonstration active power W with tested single-phase power, electric energy meter, with reactive power Var, applied power VA compares respectively, just can draw corresponding error.With power transfer is proportional pulse, and accumulative total reads active energy Wh, the reactive energy Varh that pulse can calculate corresponding tested table.With tested single-phase power, same period of electric energy meter (be that tested table and standard scale begin simultaneously, finish simultaneously, promptly with by the start-stop of the Pulse-trigger control tester impulse meter of school single-phase power, electric energy meter, down together) electric energy of accumulative total is compared, and just can calculate electric energy error.Also can power to the time T integration, or power and time T multiplied each other, send register with the result, read the value of register, compare with the electric energy of period accumulative total with tested single-phase power, electric energy meter, just can calculate the electric energy error of tested table.
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester calibrating single-phase power, electric energy meter, the electric weight that relates in the utility model
Figure Y20062000798200161
Figure Y20062000798200162
W, Var, Wh, Varh and time quantum T, the terminals U of tester 1P, U 1N, I 1P, I 1NThe current terminal 1,3 of power, electric energy meter; Voltage terminal is 2,4,5 etc.These circuit, device, vocabulary of terms all are that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, design various scheme.Because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Figure 12 is the 11 embodiment: the circuit theory diagrams that are used for three-phase and four-line power, electric energy meter calibration.
Among Figure 12: current return I is to three-phase and four-line power, electric energy meter Wh XThe circuit of electric current is provided, is divided into A phase I A, B phase I B, C phase I C, common terminal is I O(I N).Voltage circuit U is the circuit that voltage is provided to three-phase and four-line power, electric energy meter, is divided into A phase U A, B phase U B, C phase U C, common terminal U O(U N).Tested three-phase and four-line power, electric energy meter Wh XCurrent terminal be divided into and be A phase I A1x, I A2XB phase I B1x, I B2XC phase I C1x, I C2XVoltage terminal is divided into A phase U A1x, U A2XB phase U B1x, U B2XC phase U C1x, U C2X
Electric current is divided into A phase I AIP, I A1NB phase I BIP, I B1NC phase I CIP, I C1NBe the current input terminal of tested three-phase and four-line power, electric energy meter, voltage is divided into A phase U A1P, U A1NB phase U B1P, U B2NC phase U C1P, U C2NBe tested three-phase and four-line power, electric energy meter Wh XVoltage input end.
Tested three-phase and four-line power, electric energy meter Wh XA phase current terminals I A1xI with current return ATerminals connect,, tested three-phase and four-line power, electric energy meter Wh XCurrent terminal be I A2xTerminals I with tester A1PConnect the terminals I of tester A1NTerminals I with current return OConnect; Tested three-phase and four-line power, electric energy meter Wh XB phase current terminals I B1xTerminals I with current return BConnect,, tested three-phase and four-line power, electric energy meter Wh XCurrent terminal be I B2xTerminals I with tester B1PConnect the terminals I of tester B1NTerminals I with current return OConnect;Tested three-phase and four-line power, electric energy meter Wh XC phase current terminals I C1xTerminals I with current return CConnect,, tested three-phase and four-line power, electric energy meter Wh XCurrent terminal be I C2xTerminals I with tester C1PConnect the terminals I of tester C1NTerminals I with current return OConnect; Tested three-phase and four-line power, electric energy meter Wh XA phase voltage terminals U A1xTerminals U with tester A1PConnect, and be U with the terminals of voltage circuit simultaneously AConnect; Tested three-phase and four-line power, electric energy meter Wh XB phase voltage terminals U B1xTerminals U with tester N1PConnect, and be U with the terminals of voltage circuit simultaneously BConnect; Tested three-phase and four-line power, electric energy meter Wh XC phase voltage terminals U C1xTerminals U with tester C1PConnect, and be U with the terminals of voltage circuit simultaneously CConnect; Tested three-phase and four-line power, electric energy meter Wh XA phase voltage terminals U A2x, B phase voltage terminals U B2x, C phase voltage terminals U C2xTerminals with voltage circuit are U simultaneously OConnect.
When current return and voltage circuit to tested three-phase and four-line power, electric energy meter Wh XDuring power supply, electric current is directly or through the second input end I of current transformer (or forcipated mutual-inductor) input validation instrument AIP, I A1N(A phase), four-input terminal I BIP, I B1N(B phase), the 6th input end I CIP, I C1N(C phase); Be converted to voltage through sampling resistor because for A/D converter, input all be voltage, various simulating signals all will be converted to voltage, input a/d converter (down together) after A/D conversion and current effective value processing, shows the working current I of tested single-phase power, electric energy meter then; When current return and voltage circuit during to tested three-phase and four-line power, electric energy meter power supply, voltage is directly or through the first input end U of voltage transformer (VT) input validation instrument A1P, U A1N(A phase), the 3rd input end U B1P, U B2N(B phase), the 5th input end U C1P, U C2N(C phase) is converted to voltage through sample resistance, the input validation instrument, processing through A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw A phase active power W, with reactive power Var, applied power VA, with tested three-phase and four-line power, electric energy meter Wh XDemonstration active power W and reactive power Var, applied power VA compares respectively, just can draw the corresponding error of A phase; The 3rd input end and four-input terminal multiply each other, and draw B phase active power W and reactive power Var, and applied power VA is with tested three-phase and four-line power, electric energy meter Wh XDemonstration active power W and reactive power Var, applied power VA compares respectively, just can draw the corresponding error of B phase; The 5th input end and the 6th input end multiply each other, and draw C phase active power W and reactive power Var, and applied power VA is with tested three-phase and four-line power, electric energy meter Wh XDemonstration active power W and reactive power Var, applied power VA compares respectively, just can draw the corresponding error of C phase.With the active power W and the reactive power Var of A phase, B phase, C phase, applied power VA addition respectively will draw tested three-phase and four-line power, electric energy meter Wh XActive power W and reactive power Var, applied power VA.With power transfer is proportional pulse, and accumulative total reads active energy Wh, the reactive energy Varh that pulse can calculate corresponding tested table.Compare with the electric energy of tested three-phase and four-line power, (being that tested table and standard scale begin simultaneously, finish simultaneously, down together) accumulative total of same period of electric energy meter, just can calculate electric energy error.Also can power to the time T integration, or power and time T multiplied each other, send register with the result, read the value of register, with tested three-phase and four-line power, electric energy meter Wh XThe electric energy of accumulative total is compared with the period, just can calculate the electric energy error of tested table.
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester calibrating three-phase and four-line power, electric energy meter, the electric weight that invention relates to
Figure Y20062000798200181
Figure Y20062000798200182
W, Var, Wh, Varh and time quantum T, the terminals I of tester AIP, I A1NI BIP, I B1NI CIP, I C1NU A1P, U A1NU B1P, U B2NU C1P, U C2NTested three-phase and four-line power, electric energy meter electric current terminals are; I A1x, I A2XI B1x, I B2XI C1x, I C2XVoltage terminal is U A1x, U A2XU B1x, U B2XU C1x, U C2XDeng.These circuit, device, vocabulary of terms all are that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, design various scheme., because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Term all is that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, designs various scheme., because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Figure 13 is a kind of scheme of the 12 embodiment: the circuit theory diagrams that are used for phase three-wire three power, electric energy meter calibration.
Among Figure 13: current return I is the circuit that electric current is provided to phase three-wire three power, electric energy meter, and being divided into the A line end that joins is I A, the B line end that joins is I B, the C line end that joins is I CVoltage circuit U is the circuit that voltage is provided to phase three-wire three power, electric energy meter, is divided into the A phase, and terminals are U A, the B phase, terminals are U B, the C phase, terminals are U CTested phase three-wire three power, electric energy meter Wh XCurrent terminal be divided into and be A phase I A1x, I A2XC phase I C1x, I C2XVoltage terminal is divided into A phase U A1x, U A2XC phase U C1x, U C2X
Electric current is divided into A phase I AIP, I A1NC phase I CIP, I C1NBe tested phase three-wire three power, electric energy meter Wh XCurrent input terminal, voltage is divided into A phase U A1P, U A1NC phase U C1P, U C2NBe tested phase three-wire three power, electric energy meter Wh XVoltage input end.
Tested phase three-wire three power, electric energy meter Wh XA phase current terminals I A1xTerminals I with current return A1Connect tested phase three-wire three power, electric energy meter Wh XCurrent terminal be I A2xTerminals I with tester A1PConnect the terminals I of tester A1NBe connected with the common terminal of current return.Tested phase three-wire three power, electric energy meter Wh XC phase current terminals I C1xTerminals I with current return CConnect tested phase three-wire three power, electric energy meter Wh XCurrent terminal be I C2xTerminals I with tester C1PConnect the terminals I of tester C1NBe connected with the common terminal of current return; Tested phase three-wire three power, electric energy meter Wh XA phase voltage terminals U A1xTerminals U with tester A1PConnect, and be U with the terminals of voltage circuit simultaneously AConnect; Tested phase three-wire three power, electric energy meter Wh XA phase voltage terminals U A2XTerminals U with tester A1NConnect, and be U with the terminals of voltage circuit simultaneously BConnect; Tested phase three-wire three power, electric energy meter Wh XC phase voltage terminals U C1xTerminals U with tester C1PConnect, and be U with the terminals of voltage circuit simultaneously CConnect; Tested phase three-wire three power, electric energy meter Wh XC phase voltage terminals U C2XTerminals U with tester C2NConnect, and be U with the terminals of voltage circuit simultaneously BConnect
When current return and voltage circuit during to tested phase three-wire three power, electric energy meter power supply, electric current is directly or through the second input end I of current transformer (or forcipated mutual-inductor) input validation instrument AIP, I A1N(A phase), four-input terminal I CIP, I C1N(C phase); Be converted to voltage through sampling resistor because for A/D converter, input all be voltage, various simulating signals all will be converted to voltage, input a/d converter (down together) after A/D conversion and current effective value processing, shows tested phase three-wire three power, electric energy meter Wh then XWorking current I; When current return and voltage circuit to tested phase three-wire three power, electric energy meter Wh XDuring power supply, voltage is directly or through the first input end U of voltage transformer (VT) input validation instrument A1P, U A1N(A phase), the 3rd input end U C1P, U C2N(C phase) is converted to voltage through sample resistance, the input validation instrument, processing through A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw A phase active power W, with reactive power Var, applied power VA, with tested phase three-wire three power, electric energy meter Wh XDemonstration active power W and reactive power Var, applied power VA compares respectively, just can draw the corresponding error of A phase; The 3rd input end and four-input terminal multiply each other, and draw C phase active power W and reactive power Var, and applied power VA is with tested phase three-wire three power, electric energy meter Wh XDemonstration active power W and reactive power Var, applied power VA compares respectively, just can draw the corresponding error of C phase.With the active power W and the reactive power Var of A phase, C phase, applied power VA addition respectively will draw tested phase three-wire three power, electric energy meter Wh XActive power W and reactive power Var, applied power VA.With power transfer is proportional pulse, and accumulative total reads active energy Wh, the reactive energy Varh that pulse can calculate corresponding tested table.With tested phase three-wire three power, electric energy meter Wh XThe electric energy of (being that tested table and standard scale begin simultaneously, finish simultaneously, promptly with by the start-stop of the Pulse-trigger control tester impulse meter of school single-phase power, electric energy meter, together following) accumulative total of same period is compared, and just can calculate electric energy error.Also can power to the time T integration, or power and time T multiplied each other, send register with the result, read the value of register, with tested phase three-wire three power, electric energy meter Wh XThe electric energy of accumulative total is compared with the period, just can calculate the electric energy error of tested table.
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester calibrating single-phase power, electric energy meter, the electric weight that relates in the invention
Figure Y20062000798200191
Figure Y20062000798200192
W, Var, Wh, Varh and time quantum T, the terminals I of tester AIP, I A1NI CIP, I C1NU A1P, U A1NU C1P, U C2NTested phase three-wire three power, electric energy meter Wh XCurrent terminal is; I A1x, I A2XI C1x, I C2XVoltage terminal is U A1x, U A2XU C1x, U C2XDeng.These circuit, device, vocabulary of terms all are that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, design various scheme., because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Figure 14 is a kind of scheme of the 13 embodiment: the circuit theory diagrams that are used for three-phase and four-line power, electric energy meter field verification.
Among Figure 14: electric power loop DY is to three-phase and four-line power, electric energy meter Wh XThe circuit of electric current is provided, is divided into A phase U A, B phase U B, C phase U C, common terminal U O(U N).Tested three-phase and four-line power, electric energy meter Wh XCurrent terminal be divided into and be A phase I A1x, I A2XB phase I B1x, I B2XC phase I C1x, I C2XVoltage terminal is divided into A phase U A1x, U A2XB phase U B1x, U B2XC phase U C1x, U C2X
Electric current is divided into A phase I AIP, I A1NB phase I BIP, I B1NC phase I CIP, I C1NBe tested three-phase and four-line power, electric energy meter Wh XCurrent input terminal, voltage is divided into A phase U A1P, U A1NB phase U B1P, U B2NC phase U C1P, U C2NBe tested three-phase and four-line power, electric energy meter Wh XVoltage input end.
Tested three-phase and four-line power, electric energy meter Wh XA phase current terminals I A1xI with current return ATerminals connect, tested three-phase and four-line power, electric energy meter Wh XCurrent terminal be I A2xTerminals I with tester A1PConnect the terminals I of tester A1NTerminals I with current return OConnect; Tested three-phase and four-line power, electric energy meter Wh XB phase current terminals I B1xTerminals I with current return BConnect tested three-phase and four-line power, electric energy meter Wh XCurrent terminal be I B2xTerminals I with tester B1PConnect the terminals I of tester B1NTerminals I with current return OConnect.Tested three-phase and four-line power, electric energy meter Wh XC phase current terminals I C1xTerminals I with current return CConnect tested three-phase and four-line power, electric energy meter Wh XCurrent terminal be I C2xTerminals I with tester C1PConnect the terminals I of tester C1NTerminals I with current return OConnect; Tested three-phase and four-line power, electric energy meter Wh XA phase voltage terminals U A1xTerminals U with tester A1PConnect, and be U with the terminals of voltage circuit simultaneously AConnect; Tested three-phase and four-line power, electric energy meter Wh XB phase voltage terminals U B1xTerminals U with tester N1PConnect, and be U with the terminals of voltage circuit simultaneously BConnect; Tested three-phase and four-line power, electric energy meter Wh XC phase voltage terminals U C1xTerminals U with tester C1PConnect, and be U with the terminals of voltage circuit simultaneously CConnect; Tested three-phase and four-line power, electric energy meter Wh XA phase voltage terminals U A2xU with tester A1NConnection, B phase voltage terminals U B2xU with tester B1NConnection, C phase voltage terminals U C2xU with tester C1NConnect; The terminals of three's while with electric power loop are U OConnect.
When current return and voltage circuit to tested three-phase and four-line power, electric energy meter Wh XDuring power supply, electric current is directly or through the second input end I of current transformer (or forcipated mutual-inductor) input validation instrument AIP, I A1N(A phase), four-input terminal I BIP, I B1N(B phase), the 6th input end I CIP, I C1N(C phase); Be converted to voltage through sampling resistor because for A/D converter, input all be voltage, various simulating signals all will be converted to voltage, input a/d converter (down together) after A/D conversion and current effective value processing, shows the working current I of tested single-phase power, electric energy meter then; When current return and voltage circuit during to tested three-phase and four-line power, electric energy meter power supply, voltage is directly or through the first input end U of voltage transformer (VT) input validation instrument A1P, U A1N(A phase), the 3rd input end U B1P, U B2N(B phase), the 5th input end U C1P, U C2N(C phase) is converted to voltage through sample resistance, the input validation instrument, processing through A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw A phase active power W, with reactive power Var, applied power VA, with tested three-phase and four-line power, electric energy meter Wh XDemonstration active power W and reactive power Var, applied power VA compares respectively, just can draw the corresponding error of A phase; The 3rd input end and four-input terminal multiply each other, and draw B phase active power W and reactive power Var, and applied power VA is with tested three-phase and four-line power, electric energy meter Wh XDemonstration active power W and reactive power Var, applied power VA compares respectively, just can draw the corresponding error of B phase; The 5th input end and the 6th input end multiply each other, and draw C phase active power W and reactive power Var, and applied power VA is with tested three-phase and four-line power, electric energy meter Wh XDemonstration active power W and reactive power Var, applied power VA compares respectively, just can draw the corresponding error of C phase.With the active power W and the reactive power Var of A phase, B phase, C phase, applied power VA addition respectively will draw tested three-phase and four-line power, electric energy meter Wh XActive power W and reactive power Var, applied power VA.With power transfer is proportional pulse, and accumulative total reads active energy Wh, the reactive energy Varh that pulse can calculate corresponding tested table.Compare with the electric energy of tested three-phase and four-line power, (being that tested table and standard scale begin simultaneously, finish simultaneously, down together) accumulative total of same period of electric energy meter, just can calculate electric energy error.Also can power to the time T integration, or power and time T multiplied each other, send register with the result, read the value of register, with tested three-phase and four-line power, electric energy meter Wh XThe electric energy of accumulative total is compared with the period, just can calculate the electric energy error of tested table.
Below by the agency of a kind of design proposal of tester, it has satisfied the requirement of using tester calibrating three-phase and four-line power, electric energy meter, the electric weight that relates in the invention
Figure Y20062000798200211
W, Var, Wh, Varh and time quantum T, the terminals I of tester AIP, I A1NI BIP, I B1NI CIP, I C1NU A1P, U A1NU B1P, U B2NU C1P, U C2NTested three-phase and four-line power, electric energy meter electric current terminals are; I A1x, I A2XI B1x, I B2XI C1x, I C2XVoltage terminal is U A1x, U A2XU B1x, U B2XU C1x, U C2XDeng.These circuit, device, vocabulary of terms all are that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, design various scheme., because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Figure 15 is the 4th kind of scheme of the 14 embodiment: the circuit theory diagrams that are used for phase three-wire three power, electric energy meter field verification.
Among Figure 15: electric power loop DY is to phase three-wire three power, electric energy meter Wh XThe circuit of power supply is provided, is divided into A phase U A, B phase U B, C phase U CTested phase three-wire three power, electric energy meter Wh XCurrent terminal be divided into and be A phase I A1x(1), I A2X(3); C phase I C1x(6), I C2X(8); Voltage terminal is divided into A phase U A1x(2), U A2X(4,5); C phase U C1x(7), U C2X(4,5).
Electric current is divided into A phase I AIP, I A1NC phase I CIP, I C1NBe tested phase three-wire three power, electric energy meter Wh XCurrent input terminal, voltage is divided into A phase U A1P, U A1NC phase U C1P, U C2NBe tested phase three-wire three power, electric energy meter Wh XVoltage input end.
Tested phase three-wire three power, electric energy meter Wh XA phase current terminals I A1xU with electric power loop ATerminals connect, tested phase three-wire three power, electric energy meter Wh XCurrent terminal be I A2xTerminals I with tester A1PConnect the terminals I of tester A1NBe connected with the common terminal of electric power loop.Tested phase three-wire three power, electric energy meter Wh XC phase current terminals I C1xTerminals U with electric power loop CConnect tested phase three-wire three power, electric energy meter Wh XCurrent terminal be I C2xTerminals I with tester C1PConnect the terminals I of tester C1NBe connected with the common terminal of electric power loop; Tested phase three-wire three power, electric energy meter Wh XA phase voltage terminals U A1xTerminals U with tester A1PConnect, and simultaneously with the terminals U of electric power loop AConnect; Tested phase three-wire three power, electric energy meter Wh XA phase voltage terminals U A2xTerminals U with tester A1NConnect, and be U with the terminals of electric power loop simultaneously BConnect; Tested phase three-wire three power, electric energy meter Wh XC phase voltage terminals U C1xTerminals U with tester C1PConnect, and be U with the terminals of electric power loop simultaneously CConnect; Tested phase three-wire three power, electric energy meter Wh XC phase voltage terminals U C2xTerminals U with tester C1NConnect, and be U with the terminals of electric power loop simultaneously NConnect.
When current return and voltage circuit to tested phase three-wire three power, electric energy meter Wh XDuring power supply, electric current is directly or through the second input end I of current transformer (or forcipated mutual-inductor) input validation instrument AIP, I A1N(A phase), four-input terminal I CIP, I C1N(C phase); Be converted to voltage through sampling resistor because for A/D converter, input all be voltage, various simulating signals all will be converted to voltage, input a/d converter (down together) after A/D conversion and current effective value processing, shows tested phase three-wire three power, electric energy meter Wh then XWorking current I; When current return and voltage circuit during to tested phase three-wire three power, electric energy meter power supply, voltage is directly or through the first input end U of voltage transformer (VT) input validation instrument A1P, U A1N(A phase), the 3rd input end U C1P, U C2N(C phase) is converted to voltage through sample resistance, the input validation instrument, processing through A/D conversion and power measurement unit, the simplest processing is exactly that the first input end and second input end multiply each other, draw A phase active power W, with reactive power Var, applied power VA, with tested phase three-wire three power, electric energy meter Wh XDemonstration active power W and reactive power Var, applied power VA compares respectively, just can draw the corresponding error of A phase; The 3rd input end and four-input terminal multiply each other, and draw C phase active power W and reactive power Var, and applied power VA is with tested phase three-wire three power, electric energy meter Wh XDemonstration active power W and reactive power Var, applied power VA compares respectively, just can draw the corresponding error of C phase.With the active power W and the reactive power Var of A phase, B phase, C phase, applied power VA addition respectively will draw tested phase three-wire three power, electric energy meter Wh XActive power W and reactive power Var, applied power VA.With power transfer is proportional pulse, and accumulative total reads active energy Wh, the reactive energy Varh that pulse can calculate corresponding tested table.With tested phase three-wire three power, electric energy meter Wh XThe electric energy of (being that tested table and standard scale begin simultaneously, finish simultaneously, down together) accumulative total of same period is compared, and just can calculate electric energy error.Also can power to the time T integration, or power and time T multiplied each other, send register with the result, read the value of register, with tested phase three-wire three power, electric energy meter Wh XThe electric energy of accumulative total is compared with the period, just can calculate the electric energy error of tested table.
Below by the agency of a kind of design proposal of tester, it has satisfied use tester calibrating phase three-wire three power, electric energy meter Wh XRequirement, the electric weight that relates in the invention
Figure Y20062000798200221
W, Var, Wh, Varh and time quantum T, the terminals I of tester AIP, I A1NI CIP, I C1NU A1P, U A1NU C1P, U C2NTested phase three-wire three power, electric energy meter Wh XCurrent terminal is: I A1x, I A2XI C1x, I C2XVoltage terminal is U A1x, U A2XU C1x, U C2XDeng.These circuit, device, vocabulary of terms all are that this professional those of ordinary skill is known, and short of category of the present utility model and the spirit left can be made various changes and replacement, design various scheme.Because these principles and method all are that those skilled in the art is known, so, here do not describe in detail one by one.
Figure 16 is the embodiment of the 15 embodiment:
Among Figure 16: I AIP, I A1NI BIP, I B1NI CIP, I C1NU A1P, U A1NU B1P, U B2NU C1P, U C2NIt is the tester input end.Ground is earth terminal.Switch by range, each input end can be imported
Figure Y20062000798200223
Figure Y20062000798200224
Figure Y20062000798200225
They can import each input quantity among the 1st～14 embodiment of the utility model.Ground is the earth terminal that is used for ground connection.The 1st, LCD; The 2nd, power switch; The 3rd, power light; The 4th, cursor direction shifting bond(s), the 5th, numerical key, function key; The 6th, communication interface.Keyboard is divided into numerical key, function key, cursor direction shifting bond(s); 1,2,3,4,5,6,7,8,9,0. the figure place keyboard is used for input digit; Be reset to function key; F1, F2, F3 and F4 key are the final election function key, are used for defining various functions; The cursor direction shifting bond(s) has 5: ← be that cursor is moved to the left key; → be the cursor key that moves right; ↑ be the cursor key that moves up; ↓ be that cursor moves down key; ← be to determine key.Power switch, power light and LCD.Those skilled in the art is known, introduces no longer in detail.
Present embodiment can be realized the various measurement functions among the 1st～14 embodiment of the present invention, also can realize some function wherein.Measure wiring, measuring principle and measuring method and in the 1st～14 embodiment of the utility model, done detailed introduction, no longer repeat here.
Measurement is achieved in that at first according to the needs of measuring, requirement according to corresponding measurement function among the 1st～14 embodiment of the utility model carefully connects the wire, opening power, at this moment screen menu occurs and shows, just can finish various measurement functions among the 1st～14 embodiment according to the prompting of menu.
So far, by the agency of a kind of tester embodiment, certainly the embodiment that also has other, such as digital embodiments shown, because principle is identical, just handle is in LCD (LCD) data presented, using charactron (LED) instead shows, in Chinese and the symbolic information that LCD (LCD) shows, change on facial mask or the panel and show, so no longer repeat to introduce.

Claims (5)

1. mutual-inductor electric energy meter comprehensive calibrator, it is characterized in that: it comprises reference voltage (VB), analog/digital converter (ADC), digital processing circuit (DSP), central processing unit (CPU), electric energy, frequency converter (3), calibration impulse generator (4); Keyboard (5); Printer (6); Host computer (7), display (8); Wherein, reference voltage (VB) is input in the analog/digital converter (ADC), analog/digital converter (ADC) is made up of range shift switch (1) and range shift switch (2), and range shift switch (1) is provided with multi-functional input end (IP) (IN); Range shift switch (2) is provided with multi-functional input end (VP) (VN), analog/digital converter (ADC) outputs in the digital processing circuit (DSP), digital processing circuit (DSP) outputs to central processing unit (CPU) respectively, calibration impulse generator (4) and electric energy, on the frequency converter (3), calibration impulse generator (4) is input on the central processing unit (CPU), central processing unit (CPU), be two-way the connection between printer (6) and host computer (7) three in twos, central processing unit (CPU) also outputs to keyboard (5) and display (8) respectively.
2. mutual-inductor electric energy meter comprehensive calibrator according to claim 1 is characterized in that: described digital processing circuit (DSP) is made up of power factor phase measuring circuit (F.X), power, electric energy measurement circuit (W.H), frequency measurement circuit (HZ) and electric current, tension measuring circuit (V.A).
3. mutual-inductor electric energy meter comprehensive calibrator according to claim 1 and 2 is characterized in that: the multi-functional input end on described range shift switch (1) and the range shift switch (2) is at least two.
4. mutual-inductor electric energy meter comprehensive calibrator according to claim 1 and 2 is characterized in that: described display is LED or LCD.
5. mutual-inductor electric energy meter comprehensive calibrator according to claim 1 and 2 is characterized in that: described keyboard is single with key or multiplexing key.
CNU2006200079828U 2006-03-17 2006-03-17 Synthetic tester for mutual inductor electric energy meter Expired - Fee Related CN201035130Y (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101290345B (en) * 2008-06-06 2010-10-13 北京浩霆光电技术有限责任公司 Multifunctional mutual-inductor tester
CN103376437A (en) * 2012-04-28 2013-10-30 南京河海南自水电自动化有限公司 Transformer calibrator compatible with both electromagnetic transformer calibration and electronic transformer calibration
CN109342987A (en) * 2018-12-04 2019-02-15 山东泰开互感器有限公司 A kind of combined instrument transformer calibration equipment in included boosting up-flow source

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101290345B (en) * 2008-06-06 2010-10-13 北京浩霆光电技术有限责任公司 Multifunctional mutual-inductor tester
CN103376437A (en) * 2012-04-28 2013-10-30 南京河海南自水电自动化有限公司 Transformer calibrator compatible with both electromagnetic transformer calibration and electronic transformer calibration
CN109342987A (en) * 2018-12-04 2019-02-15 山东泰开互感器有限公司 A kind of combined instrument transformer calibration equipment in included boosting up-flow source
CN109342987B (en) * 2018-12-04 2024-03-22 山东泰开互感器有限公司 Combined transformer verification device with boosting and boosting sources

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