CN101038331A - Mutual-inductor electric energy meter comprehensive calibrator - Google Patents

Abstract

The invention belongs to an electric measurement field of technology, especially relates to a mutual-inductor electric energy comprehensive calibrator for measuring the current mutual-inductor, voltage mutual-inductor, impedance (including current load box), admittance (including conductance box, voltage load box), resistance (including resistance box), capacitance (including capacitance box), inductance (including the inductance box) and power, electric energy meter. The meter mainly realizes the measurement of various AC electricity quantities through the cophase component and orthogonal component of current, and voltage. The features of the invention: during the measurement of cophase component and orthogonal component of mutual-inductor, the cophase component may be measured through the measuring of active power (electric energy) method; which may not only reduce the influences of frequency variation and waveform distortion to the measurement accuracy, directly trace the higher reference of accuracy, but also use the same mutual-inductor electric energy meter calibrator for the calibrating of mutual-inductor and electric energy 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 (homophase divides scape) 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 ₀Pass through resistance R ₀, produce voltage U ₀This 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 _AOn, the potential difference Δ U=Δ I * R that obtains _AAlso be admitted to metering circuit, after amplification, switching, filtering, send into two electronic switches respectively, respectively 90 ° and 0 ° of moment, the in-phase component of extraction potential difference and quadrature component by corresponding holding circuit, are sent two analog to digital converters, after suitable computing, demonstrate the ratio error and the phase error of tested current transformer.Simultaneously, U ₀After 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: in mutual inductor in-phase component and quadrature component measurement, use the method for measuring active power (electric energy) to measure in-phase component; 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;

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

All be the vector of electric current and voltage, can use range switch 1 to switch mutually;

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.

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.

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

Another input end is

When the calibrating voltage transformer (VT), an input end is

Another input end is

When calibration power table, electric energy meter, an input end is

Another input end is

When measuring impedance and inductance, an input end is

Another input end is

When measuring admittance and electric capacity, an input end is

Another input end is

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

With

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 With voltage vector

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 $W=\stackrel{\·}{U}\×\stackrel{\·}{I}\×\mathrm{Cos\Φ}$ Work as current vector

With voltage vector

Between phase angle Φ=0 ° the time, Cos Φ=1, at this moment, $W=\stackrel{\·}{U}\×\stackrel{\·}{I}\×\mathrm{Cos\Φ}=\stackrel{\·}{U}\×\stackrel{\·}{I},$ In-phase component and current vector

Voltage vector

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

Work as current vector With voltage vector

Between phase angle Φ=90 ° the time, Cos Φ=0, at this moment, $W=\stackrel{\·}{U}\×\stackrel{\·}{I}\×\mathrm{Cos\Φ}=0,$ At this moment, real component equals 0; Work as current vector

With voltage vector

Between phase angle Φ=90 ° the time, Sos Φ=1, at this moment,

At this moment quadrature component and current vector

Voltage vector 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 _X1And L _X2Be once (elementary) terminals of tested current transformer, K _X1And K _X2Be tested Current Transformer Secondary (secondary) terminals; L ₀₁And L ₀₂Be once (elementary) terminals of standard current transformer, K ₀₁And K ₀₂Be standard current transformer secondary (secondary) terminals.

Tested current transformer is (elementary) terminals L once _X1With standard current transformer (elementary) terminals L once ₀₁Connect, tested current transformer is (elementary) terminals L once _X2With standard current transformer (elementary) terminals L once ₀₂, be connected with two current output terminals of current lifting device respectively;

Tested Current Transformer Secondary (secondary) terminals K _X1With standard current transformer secondary (secondary) terminals K ₀₁Connect, 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 ₀₂Be 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

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

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 simple processing of amount 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 Be the in-phase component of current transformer error, again divided by working current 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

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

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 _X1, L _X2, K _X1, K _X2, L ₀₁, L ₀₂, K ₀₁, K ₀₂Deng 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 ₀And X ₀Be once (elementary) terminals of standard potential transformer, a ₀And x ₀Be standard potential transformer secondary (secondary) terminals.

Tested voltage transformer (VT) is (elementary) terminals A once _XWith standard potential transformer (elementary) terminals A once ₀Connect, and be connected with an end of stepup transformer; Tested voltage transformer (VT) is (elementary) terminals X and standard potential transformer (elementary) terminals X once once ₀Connect, 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 ₀Connect, and be connected with the connection terminal a of tester; Standard potential transformer secondary (secondary) terminals x ₀Be connected with the connection terminal x of tester; And by x ₀Connect 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

Pass through a ₀And x ₀Terminals 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

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

Be the in-phase component of voltage transformer error, again divided by operating voltage

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

Be the quadrature component of voltage transformer error, again divided by operating voltage

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

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 ₀, X ₀, a ₀, x ₀Deng 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 ₁And Z ₂Be two terminals of tested impedor.

One terminals Z of tested impedor ₁Be connected with an end of current lifting device, and by Z ₁Connect a lead K, the other end of K line connects the K terminals of tester; Another terminals Z of tested impedor ₂T with tester ₀Terminals 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

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

Be voltage

Again divided by working current

Be the in-phase component R of tested impedor Z.Reactive power Var is divided by working current

Be voltage

Again divided by working current

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

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 ₁And 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

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

Be working current

Again divided by operating voltage

Be the in-phase component G of admittance.Reactive power Var is divided by operating voltage

Operating voltage

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

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 ₁And L ₂Be two terminals of measured inductance.

One terminals L of measured inductance ₁Be connected with an end of current lifting device, and by L ₁Connect 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

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

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

Operating voltage

Again divided by working current Be the in-phase component R of measured inductance L.Reactive power Var is divided by working current Operating voltage

Again divided by working current 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

L, R, X, the terminals T of tester ₀, T _x, K, D, the terminals L of inductance ₁And 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

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

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 Be working current

Again divided by operating voltage

Be the in-phase component G of admittance.Reactive power Var is divided by operating voltage

Be working current

Again divided by operating voltage

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

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

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

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

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 _N1P, 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: the power supply DY that goes the same way 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

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 ₀(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 ₀(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 ₀Connect; 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 ₀Connect; 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 ₀Connect; 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 ₀Connect.

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

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 UB, 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

W, Var, Wh, Varh and time quantum T, the terminals I of tester _AIP, I _A1NI _CIP, I _C1NU _AIP, 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 ₀(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 ₀Connect; 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 ₀Connect.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 ₀Connect; 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 three is U with the terminals that power supply is gone the same way simultaneously ₀Connect.

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

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 electric current go the same way and voltage with the tested phase three-wire three power of road direction, 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

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

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 into facial mask or and show on the plate, so no longer repeat to introduce.

Claims (10)

1, a kind of novel mutual-inductor electric energy meter comprehensive calibrator comprises: IP, IN and VP, VN two multi-functional input end IP, IN and VP, VN; Range shift switch (1) and (2), electric energy, frequency converter (3); Calibration impulse generator (4); Keyboard (5); Printer (6); Host computer (7); Display (8); Analog/digital converter ADC; Reference voltage VB; Digital processing circuit DSP; Power factor phase measuring circuit F. Φ; Power, electric energy measurement circuit W.H; Frequency measurement circuit HZ; Electric current, tension measuring circuit V.A; CF1 and CF2 are special calibration pulse CF1 and CF2.

2, mutual-inductor electric energy meter comprehensive calibrator as claimed in claim 1, input end IP, IN and VP, VN can have a plurality of.

3, a kind of method that adopts above-mentioned mutual-inductor electric energy meter comprehensive calibrator to measure mutual inductor and electric energy meter, it is characterized in that: the error of using the method measurement mutual inductor of power measurement, power, electric energy measurement unit are mainly digital multiplication or analog multiplier, and signal processing circuit, needs according to measuring accuracy and environment for use, digital signal processing DSP can be used, also digital signal processing DSP can be do not used.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

With voltage vector

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, phasing degree Φ=0 ° between two amounts; In-phase component is proportional to active power $W=\stackrel{\·}{U}\×\stackrel{\·}{I}\×\mathrm{Cos\Φ},$ Work as current vector

With voltage vector Between phase angle Φ=0 ° the time, Cos Φ=1, at this moment, $W=\stackrel{\·}{U}\×\stackrel{\·}{I}\×\mathrm{Cos\Φ}=\stackrel{\·}{U}\×\stackrel{\·}{I},$ In-phase component and current vector

Voltage vector

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

Work as current vector

With voltage vector

Between phase angle Φ=90 ° the time, Cos Φ=0, at this moment, $W=\stackrel{\·}{U}\×\stackrel{\·}{I}\×\mathrm{Cos\Φ}=0,$ At this moment, real component equals 0; Work as current vector

With voltage vector

Between phase angle Φ=90 ° the time, Sos Φ=1, at this moment,

At this moment quadrature component and current vector

Voltage vector

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.So can measure power, electric energy error, the error of energy measurement mutual inductor again simultaneously.In mutual inductor in-phase component and quadrature component measurement, use the method for measuring active power (electric energy) to measure in-phase component; 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.

First input end (IP, IN) is a multi-functional input end, among the figure

All be the vector of electric current and voltage, can use range switch to switch mutually;

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.

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.

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 to switch mutually; Two input ends should keep following corresponding relation: when the calibrating current transformer, an input end is Another input end is

When the calibrating voltage transformer (VT), an input end is

Another input end is

When calibration power table, electric energy meter, an input end is

Another input end is

When measuring impedance and inductance, an input end is

Another input end is When measuring admittance and electric capacity, an input end is

Another input end is

As long as meet above-mentioned corresponding relation, it all is the same using which interface, as required, can the more input end of facility, because 26S Proteasome Structure and Function is identical, only illustrate.

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, and these conversions all are that those skilled in the art is known, here just no longer described in detail.According to the needs of measuring, can use multi-channel A/D analog/digital converter, also can use multi-disc A/D analog/digital converter, according to the precision difference, select not isotopic number A/D analog/digital converter for use, 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

With

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 utility model.

4, method as claimed in claim 3 comprises: tested current transformer CT _x, standard current transformer CT ₀, adjustable transformer T ₁, rising current transformer T ₂, current loading case Z, tested current transformer input end T _x, standard current transformer input end T ₀, difference stream the high-end K of input, difference stream input low side D; Current Transformer Secondary current input terminal T _x, T ₀Multiply each other with input end K, the D of difference stream, draw active power W and reactive power Var, active power W is divided by working current

Be the in-phase component of current transformer error, again divided by working current

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

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 (').Just can be used for the calibrating and the verification of current transformer.

5, method as claimed in claim 3 comprises: tested voltage transformer pt _x, standard potential transformer PT ₀, adjustable transformer T ₁, step-up transformer T ₂, voltage load box Y, voltage transformer secondary (secondary) high input end a, x be that the high-end K of input, the D of the low input end x of voltage transformer secondary (secondary), differential pressure is differential pressure input low side D; Voltage input end a, the x of voltage transformer secondary (secondary) and the input end K of differential pressure, the simplest processing of D are exactly that the first input end and second input end multiply each other, and draw active power W and reactive power Var, and active power W is divided by operating voltage

Be the in-phase component of voltage transformer error, again divided by operating voltage

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

Be the quadrature component of voltage transformer error, again divided by operating voltage

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 (').Be calibrating and the verification that is used for voltage transformer (VT).

6, method as claimed in claim 3 comprises: Z is tested impedor Z, adjustable transformer T ₁, rising current transformer T ₂, tested current transformer input end T _x, standard current transformer input end T ₀(T _xAnd T ₀Also be the input end of the electric current of impedance), the high-end K of input of differential pressure, differential pressure input low side D; The input end T of the electric current of impedance _x, T ₀Multiply each other with input end K, the D of differential pressure, draw active power W and reactive power Var, active power W is divided by working current

Be voltage U, be the in-phase component R of tested impedor Z again divided by working current I.Reactive power Var is a voltage divided by working current I

Again divided by working current

Be the quadrature component X of tested impedor Z.Be used for the calibrating and the verification of impedance, impedance case and current loading case.

7, method as claimed in claim 3 comprises: Y is tested admittance Y, adjustable transformer T ₁, step-up transformer T ₂, the low input end x (a and x also are the voltage input ends of admittance) of high input end a, voltage transformer secondary (secondary) of voltage transformer secondary (secondary), the high-end K of input, the difference stream input low side D of difference stream; Input end K, the D of voltage input end a, the x of admittance and difference stream multiply each other, and draw active power W and reactive power Var, and active power W is divided by operating voltage

Be working current Again divided by operating voltage Be the in-phase component G of admittance.Reactive power Var is divided by operating voltage

Operating voltage

Be working current

Remove the quadrature component B that is admittance again.Be used for the calibrating and the verification of admittance, electric guide box and voltage load box.

8, method as claimed in claim 3 comprises: measured inductance L, adjustable transformer T ₁, rising current transformer T ₂, tested current transformer input end T _x, standard current transformer input end T ₀(T _xAnd T ₀Also by the current input terminal of school inductance), the high-end K of input of differential pressure, differential pressure input low side D; By the current input terminal T of school inductance _x, T ₀Multiply each other with input end K, the D of differential pressure, draw active power W and reactive power Var, active power W is divided by working current

Operating voltage

Again divided by working current

Be the in-phase component R of measured inductance L.Reactive power Var is divided by working current

Operating voltage

Again divided by working current

Be the quadrature component X of measured inductance L, quadrature component X is inductance L divided by ω.Be used for the calibrating and the verification of inductance, inductance box and inductance bridge.

9, method as claimed in claim 3 comprises: measured capacitor C, adjustable transformer T ₁, step-up transformer T ₂, the low input end x (a and x are also by the voltage input end of school electric capacity) of high input end a, voltage transformer secondary (secondary) of voltage transformer secondary (secondary), the high-end K of input, the difference stream input low side D of difference stream; Input end K, D by voltage input end a, the x of school electric capacity and difference stream multiply each other, and draw active power W and reactive power Var, and active power W is divided by operating voltage

Be working current

Again divided by operating voltage

Be the in-phase component G of admittance.Reactive power Var is divided by operating voltage

Be working current

Again divided by operating voltage

Be the quadrature component B of admittance, quadrature component B is capacitor C divided by ω.Be used for the calibrating and the verification of electric capacity, capacitive and capacitance bridge.

10 displays can be LED, LCD or other demonstration.

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