CN103091659B - Electric energy meter dynamic measurement cycle power sequence proportional allocation calibration method - Google Patents

Electric energy meter dynamic measurement cycle power sequence proportional allocation calibration method Download PDF

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CN103091659B
CN103091659B CN201310023075.7A CN201310023075A CN103091659B CN 103091659 B CN103091659 B CN 103091659B CN 201310023075 A CN201310023075 A CN 201310023075A CN 103091659 B CN103091659 B CN 103091659B
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electric energy
energy meter
dynamic load
ook
signal
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CN201310023075.7A
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CN103091659A (en
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陆以彪
王学伟
韩东
王琳
齐传凤
吕华
李鹏
万静
孙洋
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国家电网公司
黑龙江省电力科学研究院
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00Testing or calibrating of apparatus covered by the preceding groups
    • G01R35/04Testing or calibrating of apparatus covered by the preceding groups of instruments for measuring time integral of power or current

Abstract

The electric energy meter dynamic measurement cycle power sequence proportional allocation calibration method belongs to the technical field of electric energy meter dynamic performance measurement. The electric energy meter dynamic measurement cycle power sequence proportional allocation calibration method solves the problem that a power signal source is adopted to produce dynamic load electric energy signals, and therefore measurement tracing error can not be given out in the existing dynamic performance measurement test of an electric energy meter. The electric energy meter dynamic measurement cycle power sequence proportional allocation calibration method adopts synchronous on-off keying (OOK) cycle on-off control signals generated from three-phase steady-state voltages or three-phase steady-state current signals to dynamically distribute the three-phase steady-state current signals, by using a power electronic component, such as controllable silicon, transient state, short time and long time three kinds of periodically-changed dynamic load current signals are controlled to be produced, and dynamic load power is input into the electric energy meter under test in a discrete electric energy sequence mode. Dynamic load measurement validation error of the electric energy meter under the test is calculated by collecting output impulse of a standard electric energy meter and the electric energy meter under the test, and dynamic load measurement test tracing of the electric energy meter under the test can be achieved. The electric energy meter dynamic measurement cycle power sequence proportional allocation calibration method is suitable for validation of electric energy meters.

Description

Electric energy meter dynamic measurement cycle power sequence proportional allocation calibration

Technical field

The present invention relates to electric energy meter dynamic measurement cycle power sequence proportional allocation calibration, belong to electric energy meter dynamic property field of measuring techniques.

Background technology

In the last few years, along with the development of industrial technology, in electric system, dynamic power load constantly increases, as: the high-power electric driven equipment used in the industries such as the ac arc furnace used in the high-power silicon rectifying equipment used in electric railway, iron and steel enterprise and ac converter apparatus, petrochemical industry and machinery and motor variable-frequency speed-regulating device, building tower crane and welding gear etc.These dynamic load main manifestations are: load momentary current acutely, on a large scale fluctuates up and down, occurs time dependent subharmonic etc., make electric energy meter create larger electric energy metering error, all cause great economic loss to power supply and electricity consumption both sides.Therefore, realize having become a new problem urgently to be resolved hurrily to the metering performance test of now widely used electric energy meter under dynamic load.

At present, the electric energy meter of various principle, all for the design of steady state load situation, manufacture, test and check, does not comprise the test of electric energy meter under dynamic loading conditions.For dynamic load situation, the dynamic measurement characteristic of the electric energy meter that different manufacturers is produced does not obtain sufficient testing research.In research at present to electric energy meter dynamic perfromance, dynamic load electric power signal for the performance test of electric energy meter dynamic measurement all directly produces with power signal source, the method of this generation dynamic load electric power signal lacks traces to the source to the test of electric energy meter dynamic measurement performance, cannot provide metering and to trace to the source error.

Summary of the invention

The present invention is existing in the dynamic property metrology and measurement of electric energy meter in order to solve, power signal source is adopted to produce dynamic load electric power signal, the problem of measuring error of tracing to the source cannot be provided, provide a kind of electric energy meter dynamic measurement cycle power sequence proportional allocation calibration.

Electric energy meter dynamic measurement cycle power sequence proportional allocation calibration of the present invention, it adopts three-phase steady state voltage signal or three-phase steady state current signals to produce synchronous break-make control signal OOK by period allocated circuit, this break-make control signal OOK generates dynamic load current signal by three phase dynamic load current signal generating circuit, and this dynamic load current signal inputs to tested electric energy meter with the form of discrete electric energy sequence; Described three phase dynamic load current signal generating circuit adopts three-phase steady state current signals as working power; Tested electric energy meter adopts three-phase steady state voltage signal as working power;

Then the pulse signal that tested electric energy meter exports is gathered, gather the pulse signal that standard electric energy meter exports simultaneously, described standard electric energy meter works under described three-phase steady state voltage signal and three-phase steady state current signals, the pulse signal that the pulse signal adopting electric energy meter dynamic load metering verify error counting circuit to export tested electric energy meter and standard electric energy meter export calculates, obtain the dynamic load metering verify error of tested electric energy meter, realize tracing to the source to the dynamic load metrology and measurement of tested electric energy meter.

Described synchronous break-make control signal OOK s (t) is:

s ( t ) = Σ n a n g ( t - nT ) ,

A in formula nfor the discrete electric energy sequence of dynamic load current signal, n is the sequence number of discrete electric energy sequence, a nexpression formula be:

T is the time, and T is the 50Hz industrial-frequency alternating current cycle,

Rectangular window function

N is natural number;

OOK dynamic load time domain momentary current i under synchronous break-make control signal OOK control mode in the n-th control cycle dn(t) be:

I in formula rmsfor the current effective value of OOK dynamic load time domain, ω is the electric current angular frequency of OOK dynamic load time domain, φ nbe the OOK dynamic load time domain momentary current i in the n-th control cycle dnt the initial angle of () fundametal compoment or harmonic component, A is OOK dynamic load time domain momentary current i dn(t) harmonic component amplitude, m 1and m 2be positive integer, ratio be OOK dynamic load time domain momentary current i dnthe integral frequency harmonizing wave of (t) or fractional harmoni;

ω=2 π f, m 1, m 2∈ N *, N *for just natural set, A ∈ Q *, Q *for positive rational number set, and nT≤t≤(n+1) T, when during for integer, i dncontaining integral frequency harmonizing wave current component in (t); When during for mark, i dncontaining non-integer harmonics current component in (t);

Dynamic load current signal is with discrete electric energy sequence { E di0(n), E di1(n), E di2(n) ..., E din(n) } form input to tested electric energy meter, E dinn () is the dynamic load electric energy in synchronous break-make control signal OOK n-th control cycle, E dinn () is expressed as with the form of electric energy equivalent:

U in formula rmsfor the voltage effective value of OOK dynamic load time domain, E qfor quantizing electric energy equivalent, it is the quantification electric energy equivalent under a certain verification initial conditions;

Use T arepresent number complete cycle of the 50Hz sinusoidal current signal comprised in the conduction period of 1 synchronous break-make control signal OOK, use T rrepresent number complete cycle of the 50Hz sinusoidal current signal comprised in the blocking interval of 1 synchronous break-make control signal OOK,

The dynamic load current signal be transfused to when tested electric energy meter is T a, T bduring synchronous break-make control signal OOK under condition, gather the pulse signal number N that tested electric energy meter exports a, calculate the pulse signal number N obtaining and export with tested electric energy meter apulse number m is determined in the calculation of corresponding standard electric energy meter 0:

m 0 = 3600 × 1000 C * K I * K U * K J * N A * C 0 * T A + T B T A ,

In formula, C is that tested electric energy meter exports meter constant, and unit is P/kWh; K ifor the current transformer ratio that checking procedure Plays electric energy meter is external; K ufor the voltage transformer (VT) no-load voltage ratio that checking procedure Plays electric energy meter is external; K jfor connection factor, C 0for standard electric energy meter exports meter constant, unit is P/WS;

According to the full sized pules number m that tested electric energy meter exports under dynamic load electrical energy conditions, the dynamic load metering verify error γ obtaining tested electric energy meter is:

γ = m 0 - m m × 100 % ;

Three-phase steady state voltage signal and three-phase steady state current signals, under all-pass control model, are inputted tested electric energy meter by the synchronous break-make control signal OOK that tested electric energy meter is transfused to, and gather the pulse signal number N that tested electric energy meter exports s, calculate the pulse signal number N obtaining and export with tested electric energy meter spulse number m is determined in the calculation of corresponding standard electric energy meter s0:

m S 0 = 3600 × 1000 C * K I * K U * K J * N S * C 0 ,

According to the full sized pules number m corresponding to the given metering stable state electric energy of tested electric energy meter s, dynamic load metrology and measurement is carried out to tested electric energy meter and traces to the source, its error γ that traces to the source sfor:

γ S = m S 0 - m S m S × 100 % .

Advantage of the present invention: the present invention effectively can reflect that electric energy meter dynamic load metering performance and the test of electric energy meter dynamic load metering performance are traced to the source.It adopts the synchronous OOK cycle break-make control signal produced by three-phase steady state voltage or three-phase steady state current signals to carry out dynamic assignment to three-phase steady state current signals, the power electronic devices such as controllable silicon are utilized to realize controlling to produce transient state, in short-term with three kinds of dynamic load current signals in mechanical periodicity time long, dynamic load electric energy is inputed to tested electric energy meter with the form of discrete electric energy sequence, the dynamic load metering verify error of tested electric energy meter is calculated by the output pulse of collecting standard electric energy meter and tested electric energy meter, and can realize tracing to the source to the dynamic load metrology and measurement of tested electric energy.

The present invention establishes the computing method of electric energy meter dynamic load metering verify error, the static error of standard electric energy meter can be transitioned into the dynamic error of tested electric energy meter, by contrast be assigned to the dynamic load electric energy of tested electric energy meter theoretical value, with tested electric energy meter actual metered to dynamic load energy value calculate the dynamic load error in dipping providing tested electric energy meter.

Accompanying drawing explanation

Fig. 1 is the theory diagram of electric energy meter dynamic measurement cycle power sequence proportional allocation calibration of the present invention.

Embodiment

Embodiment one: present embodiment is described below in conjunction with Fig. 1, electric energy meter dynamic measurement cycle power sequence proportional allocation calibration described in present embodiment, it adopts three-phase steady state voltage signal or three-phase steady state current signals to produce synchronous break-make control signal OOK by period allocated circuit 1, this break-make control signal OOK generates dynamic load current signal by three phase dynamic load current signal generating circuit 2, and this dynamic load current signal inputs to tested electric energy meter with the form of discrete electric energy sequence; Described three phase dynamic load current signal generating circuit 2 adopts three-phase steady state current signals as working power; Tested electric energy meter adopts three-phase steady state voltage signal as working power;

Then the pulse signal that tested electric energy meter exports is gathered, gather the pulse signal that standard electric energy meter exports simultaneously, described standard electric energy meter works under described three-phase steady state voltage signal and three-phase steady state current signals, the pulse signal that the pulse signal adopting electric energy meter dynamic load metering verify error counting circuit 3 to export tested electric energy meter and standard electric energy meter export calculates, obtain the dynamic load metering verify error of tested electric energy meter, realize tracing to the source to the dynamic load metrology and measurement of tested electric energy meter.

To the mode that tested electric energy meter verifies described in present embodiment, can be used for the measurement to two tested electric energy meters.Only period allocated circuit 1 need be produced synchronous break-make control signal OOK to realize controlling through a Sheffer stroke gate, the synchronous break-make control signal OOK produced by distributor circuit 1 directly inputs to the three phase dynamic load current signal generating circuit 2 corresponding with a tested electric energy meter, and the signal of the synchronous break-make control signal OOK that distributor circuit 1 produces after Sheffer stroke gate conversion inputs to three phase dynamic load current signal generating circuit 2 corresponding to another tested electric energy meter.Also can arrange accordingly measurement situation according to actual needs.

Embodiment two: present embodiment is described below in conjunction with Fig. 1, present embodiment is further illustrating embodiment one, and described in present embodiment, synchronous break-make control signal OOK s (t) is:

s ( t ) = Σ n a n g ( t - nT ) ,

A in formula nfor the discrete electric energy sequence of dynamic load current signal, n is the sequence number of discrete electric energy sequence, a nexpression formula be:

T is the time, and T is the 5OHz industrial-frequency alternating current cycle,

Rectangular window function

N is natural number;

OOK dynamic load time domain momentary current i under synchronous break-make control signal OOK control mode in the n-th control cycle dn(t) be:

I in formula rmsfor the current effective value of OOK dynamic load time domain, ω is the electric current angular frequency of OOK dynamic load time domain, φ nbe the OOK dynamic load time domain momentary current i in the n-th control cycle dnt the initial angle of () fundametal compoment or harmonic component, A is OOK dynamic load time domain momentary current i dn(t) harmonic component amplitude, m 1and m 2be positive integer, ratio be OOK dynamic load time domain momentary current i dnthe integral frequency harmonizing wave of (t) or fractional harmoni;

ω=2 π f, m 1, m 2∈ N *, N *for just natural set, A ∈ Q *, Q *for positive rational number set, and nT≤t≤(n+1) T, when during for integer, i dncontaining integral frequency harmonizing wave current component in (t); When during for mark, i dncontaining non-integer harmonics current component in (t);

Dynamic load current signal is with discrete electric energy sequence { E di0(n), E di1(n), E di2(n) ..., E din(n) } form input to tested electric energy meter, E dinn () is the dynamic load electric energy in synchronous break-make control signal OOK n-th control cycle, E dinn () is expressed as with the form of electric energy equivalent:

U in formula rmsfor the voltage effective value of OOK dynamic load time domain, E qfor quantizing electric energy equivalent, it is the quantification electric energy equivalent under a certain verification initial conditions;

Use T arepresent number complete cycle of the 50Hz sinusoidal current signal comprised in the conduction period of 1 synchronous break-make control signal OOK, use T brepresent number complete cycle of the 50Hz sinusoidal current signal comprised in the blocking interval of 1 synchronous break-make control signal OOK,

The dynamic load current signal be transfused to when tested electric energy meter is T a, T bduring synchronous break-make control signal OOK under condition, gather the pulse signal number N that tested electric energy meter exports a, calculate the pulse signal number N obtaining and export with tested electric energy meter apulse number m is determined in the calculation of corresponding standard electric energy meter 0:

m 0 = 3600 × 1000 C * K I * K U * K J * N A * C 0 * T A + T B T A ,

In formula, C is that tested electric energy meter exports meter constant, and unit is P/kWh; K ifor the current transformer ratio that checking procedure Plays electric energy meter is external; K ufor the voltage transformer (VT) no-load voltage ratio that checking procedure Plays electric energy meter is external; K jfor connection factor, C 0for standard electric energy meter exports meter constant, unit is P/WS;

According to the full sized pules number m that tested electric energy meter exports under dynamic load electrical energy conditions, the dynamic load metering verify error γ obtaining tested electric energy meter is:

γ = m 0 - m m × 100 % ;

Three-phase steady state voltage signal and three-phase steady state current signals, under all-pass control model, are inputted tested electric energy meter by the synchronous break-make control signal OOK that tested electric energy meter is transfused to, and gather the pulse signal number N that tested electric energy meter exports s, calculate the pulse signal number N obtaining and export with tested electric energy meter spulse number m is determined in the calculation of corresponding standard electric energy meter s0:

m S 0 = 3600 × 1000 C * K I * K U * K J * N S * C 0 ,

According to the full sized pules number m corresponding to the given metering stable state electric energy of tested electric energy meter s, dynamic load metrology and measurement is carried out to tested electric energy meter and traces to the source, its error γ that traces to the source sfor:

γ S = m S 0 - m S m S × 100 % .

In present embodiment, the external current transformer of checking procedure Plays electric energy meter is used for carrying out current transformation and isolation, and the external voltage transformer (VT) of standard electric energy meter is used for carrying out voltage transformation and isolation.

Embodiment three: present embodiment is further illustrating embodiment two, T described in present embodiment aand T bnumber scope be 1 ~ 2000.

Embodiment four: present embodiment is further illustrating embodiment one, two or three, described in present embodiment, three phase dynamic load current signal generating circuit 2 is three-phase current ghyristor circuit.

Embodiment five: present embodiment is further illustrating embodiment one, two, three or four, the dynamic load current signal that three phase dynamic load current signal generating circuit 2 described in present embodiment generates be transient state, in short-term with dynamic load current signal time long, this transient state, be mechanical periodicity with dynamic load current signal time long in short-term;

Transient state dynamic load current signal is: in a break-make control cycle of synchronous break-make control signal OOK, T ait is 1 ~ 5;

Dynamic load current signal is in short-term: in a break-make control cycle of synchronous break-make control signal OOK, T ait is 5 ~ 50;

Time long, dynamic load current signal is: in a break-make control cycle of synchronous break-make control signal OOK, T ait is 50 ~ 500.

Present embodiment adopts the power electronic devices such as controllable silicon to realize controlling to produce three-phase OOK dynamic load current signal.The three-phase OOK dynamic load current signal produced is for controlling the dynamic load electric power signal producing three types:

Transient state dynamic load current signal: in 1 OOK break-make control cycle, logical periodicity T ascope is 1 ~ 5, and namely the current flowing time is 20ms ~ 100ms, can reflect the electricity consumption situation of quick washing consumer etc.;

Dynamic load current signal in short-term: in 1 OOK break-make control cycle, logical periodicity T ascope is 5 ~ 50, and namely the current flowing time is 100ms ~ 1000ms, can reflect that middling speed impacts the electricity consumption situation of consumer or fluctuating load;

Dynamic load current signal time long: in 1 OOK break-make control cycle, logical periodicity T ascope is 50 ~ 500, and namely the current flowing time is 1s ~ 10s, can reflect the electricity consumption situation of break-make consumer or slow speed fluctuation load.

Embodiment six: present embodiment is further illustrating embodiment one, two, three, four or five, the synchronous square wave control signal that three-phase steady state voltage signal described in present embodiment or three-phase steady state current signals select rear output corresponding with three-phase steady state voltage signal or three-phase steady state current signals by selecting control circuit 4, this synchronous square wave control signal is exported to period allocated circuit 1 and is produced synchronous break-make control signal OOK.

In present embodiment, synchronous break-make control signal OOK adopts following control model to produce by period allocated circuit 1:

Voltage mode control: produced by Stable State of Sine voltage signal.Under three-phase and four-line wiring condition, produce cycle break-make control signal OOK by the synchronizing voltage square-wave signal after A phase or the shaping of C phase phase voltage; Under phase three-wire three condition, produce cycle break-make control signal OOK by the synchronizing voltage square-wave signal after the shaping of AB or CB line voltage.

Current control mode: produced by Stable State of Sine current signal.Cycle break-make control signal OOK is produced by the synchronizing current square-wave signal after A phase, B phase or the shaping of C phase current signal.

All-pass control model: make the power electronic devices such as controllable silicon be in conducting state all the time, inputs to tested electric energy meter by stable state three-phase current signal.

Claims (5)

1. an electric energy meter dynamic measurement cycle power sequence proportional allocation calibration, it adopts three-phase steady state voltage signal or three-phase steady state current signals to produce synchronous break-make control signal OOK by period allocated circuit (1), this break-make control signal OOK generates dynamic load current signal by three phase dynamic load current signal generating circuit (2), and this dynamic load current signal inputs to tested electric energy meter with the form of discrete electric energy sequence; Described three phase dynamic load current signal generating circuit (2) adopts three-phase steady state current signals as working power; Tested electric energy meter adopts three-phase steady state voltage signal as working power;
Then the pulse signal that tested electric energy meter exports is gathered, gather the pulse signal that standard electric energy meter exports simultaneously, described standard electric energy meter works under described three-phase steady state voltage signal and three-phase steady state current signals, the pulse signal that the pulse signal adopting electric energy meter dynamic load metering verify error counting circuit (3) to export tested electric energy meter and standard electric energy meter export calculates, obtain the dynamic load metering verify error of tested electric energy meter, realize tracing to the source to the dynamic load metrology and measurement of tested electric energy meter;
It is characterized in that,
Described synchronous break-make control signal OOK s (t) is:
s ( t ) = Σ n a n g ( t - nT ) ,
A in formula nfor the discrete electric energy sequence of dynamic load current signal, n is the sequence number of discrete electric energy sequence, a nexpression formula be:
T is the time, and T is the 50Hz industrial-frequency alternating current cycle,
Rectangular window function n ∈ N;
N is natural number;
OOK dynamic load time domain momentary current i under synchronous break-make control signal OOK control mode in the n-th control cycle dn(t) be:
I in formula rmsfor the current effective value of OOK dynamic load time domain, ω is the electric current angular frequency of OOK dynamic load time domain, φ nbe the OOK dynamic load time domain momentary current i in the n-th control cycle dnt the initial angle of () fundametal compoment or harmonic component, A is OOK dynamic load time domain momentary current i dn(t) harmonic component amplitude, m 1and m 2be positive integer, ratio be OOK dynamic load time domain momentary current i dnthe integral frequency harmonizing wave of (t) or fractional harmoni;
ω=2 π f, m 1, m 2∈ N *, N *for just natural set, A ∈ Q *, Q *for positive rational number set, and nT≤t≤(n+1) T, when during for integer, i dncontaining integral frequency harmonizing wave current component in (t); When during for mark, i dncontaining non-integer harmonics current component in (t);
Dynamic load current signal is with discrete electric energy sequence { E di0(n), E di1(n), E di2(n) ..., E din(n) } form input to tested electric energy meter, E dinn () is the dynamic load electric energy in synchronous break-make control signal OOK n-th control cycle, E dinn () is expressed as with the form of electric energy equivalent:
U in formula rmsfor the voltage effective value of OOK dynamic load time domain, E qfor quantizing electric energy equivalent, it is the quantification electric energy equivalent under a certain verification initial conditions;
Use T arepresent number complete cycle of the 50Hz sinusoidal current signal comprised in the conduction period of 1 synchronous break-make control signal OOK, use T brepresent number complete cycle of the 50Hz sinusoidal current signal comprised in the blocking interval of 1 synchronous break-make control signal OOK,
The dynamic load current signal be transfused to when tested electric energy meter is T a, T bduring synchronous break-make control signal OOK under condition, gather the pulse signal number N that tested electric energy meter exports a, calculate the pulse signal number N obtaining and export with tested electric energy meter apulse number m is determined in the calculation of corresponding standard electric energy meter 0:
m 0 = 3600 × 1000 C * K I * K U * K J * N A * C 0 * T A + T B T A ,
In formula, C is that tested electric energy meter exports meter constant, and unit is P/kWh; K ifor the current transformer ratio that checking procedure Plays electric energy meter is external; K ufor the voltage transformer (VT) no-load voltage ratio that checking procedure Plays electric energy meter is external; K jfor connection factor, C 0for standard electric energy meter exports meter constant, unit is P/WS;
According to the full sized pules number m that tested electric energy meter exports under dynamic load electrical energy conditions, the dynamic load metering verify error γ obtaining tested electric energy meter is:
γ = m 0 - m m × 100 % ;
Three-phase steady state voltage signal and three-phase steady state current signals, under all-pass control model, are inputted tested electric energy meter by the synchronous break-make control signal OOK that tested electric energy meter is transfused to, and gather the pulse signal number N that tested electric energy meter exports s, calculate the pulse signal number N obtaining and export with tested electric energy meter spulse number m is determined in the calculation of corresponding standard electric energy meter s0:
m S 0 = 3600 × 1000 C * K I * K U * K J * N S * C 0 ,
According to the full sized pules number m corresponding to the given metering stable state electric energy of tested electric energy meter s, dynamic load metrology and measurement is carried out to tested electric energy meter and traces to the source, its error γ that traces to the source sfor:
γ S = m S 0 - m S m S × 100 % .
2. electric energy meter dynamic measurement cycle power sequence proportional allocation calibration according to claim 1, is characterized in that, described T aand T bnumber scope be 1 ~ 2000.
3. electric energy meter dynamic measurement cycle power sequence proportional allocation calibration according to claim 1 and 2, is characterized in that, described three phase dynamic load current signal generating circuit (2) is three-phase current ghyristor circuit.
4. electric energy meter dynamic measurement cycle power sequence proportional allocation calibration according to claim 3, is characterized in that,
The dynamic load current signal that described three phase dynamic load current signal generating circuit (2) generates be transient state, in short-term with dynamic load current signal time long, this transient state, be mechanical periodicity with dynamic load current signal time long in short-term;
Transient state dynamic load current signal is: in a break-make control cycle of synchronous break-make control signal OOK, T ait is 1 ~ 5;
Dynamic load current signal is in short-term: in a break-make control cycle of synchronous break-make control signal OOK, T ait is 5 ~ 50;
Time long, dynamic load current signal is: in a break-make control cycle of synchronous break-make control signal OOK, T ait is 50 ~ 500.
5. the electric energy meter dynamic measurement cycle power sequence proportional allocation calibration according to claim 1,2 or 4, it is characterized in that, described three-phase steady state voltage signal or three-phase steady state current signals export the synchronous square wave control signal corresponding with three-phase steady state voltage signal or three-phase steady state current signals after selecting control circuit (4) to select, and this synchronous square wave control signal is exported to period allocated circuit (1) and produced synchronous break-make control signal OOK.
CN201310023075.7A 2013-01-22 2013-01-22 Electric energy meter dynamic measurement cycle power sequence proportional allocation calibration method CN103091659B (en)

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