CN106772204B - The emulation mode and device of electric energy meter metering circuit - Google Patents
The emulation mode and device of electric energy meter metering circuit Download PDFInfo
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- CN106772204B CN106772204B CN201611055644.6A CN201611055644A CN106772204B CN 106772204 B CN106772204 B CN 106772204B CN 201611055644 A CN201611055644 A CN 201611055644A CN 106772204 B CN106772204 B CN 106772204B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention proposes the emulation modes and device of a kind of electric energy meter metering circuit, and wherein method includes: the parameter of the schematic diagram and A/D conversion circuit that obtain electric energy meter；The digital circuit models of A/D conversion circuit are established in Simulink software according to the parameter；According to the schematic diagram of the electric energy meter, analog circuit model is established in Saber software；Data connection is carried out to analog circuit model described in the digital circuit models and Saber software in Simulink software using the SaberCosim module in the Saber software, the digital circuit models and analog circuit model collectively constitute associative simulation model；It runs the Saber software and associative simulation is carried out to the associative simulation model, and calculate the simulation result of the electric energy meter metering circuit.The present invention realizes the mutual supplement with each other's advantages between simulation software, so that more accurate to the simulation of intelligent electric meter metering process by the way that the data of Simulink and Saber are swapped transmitting.
Description
Technical field
The present invention relates to modeling and simulating field more particularly to a kind of emulation modes and device of electric energy meter metering circuit.
Background technique
Intelligent electric energy meter is the important equipment for establishing nationwide smart grid, and energy metering accuracy direct relation is used
The vital interests at family and national grid.The metering circuit of intelligent electric energy meter can be divided into two portions of analog circuit and digital circuit
Point.Currently, seldom considering that electric energy meter is practical just for one of part, and when emulating to the simulation analysis that electric energy meter carries out
The parameters numbers calculation method such as circuit operation principles and active power such as A/D conversion inside metering chip.This meeting is so that electric energy
Meter amount Simulation results not can accurately reflect border metering situation in fact, and then influence electric energy meter design result.
Summary of the invention
It is an object of the present invention to solve that single simulation software can not be applied in current electric energy meter simulation process while meeting
For in the ammeter course of work digital process and simulation process accurately emulate the problem of.
In order to achieve the above object, the invention proposes a kind of emulation modes of intelligent electric energy meter metering circuit, comprising: obtains
Take the schematic diagram of electric energy meter and the parameter of A/D conversion circuit；A/D conversion electricity is established in Simulink software according to the parameter
The digital circuit models on road；According to the schematic diagram of the electric energy meter, analog circuit model is established in Saber software；Using institute
The SaberCosim module in Saber software is stated in the digital circuit models and Saber software in Simulink software
The analog circuit model carries out data connection, and the digital circuit models and analog circuit model collectively constitute associative simulation mould
Type；It runs the Saber software and associative simulation is carried out to the associative simulation model, and calculate the electric energy meter metering circuit
Simulation result.
Further, the parameter of the A/D conversion circuit of electric energy meter is obtained, and according to the parameter in Simulink software
The step of establishing the digital circuit models of A/D conversion circuit includes: the standard electric for obtaining the A/D conversion circuit of the electric energy meter
Pressure, register digit and data renewal frequency；According to the normal voltage, register digit and data renewal frequency, make
With the digital circuit models of MATLAB language construct A/D conversion circuit, and the voltage amplification times of the digital circuit models is set
Number, firewire current amplification factor, neutral line current amplification factor.
Further, the schematic diagram according to the electric energy meter, establishes the step of analog circuit model in Saber software
It suddenly include: setting sinusoidal voltage source, sinusoidal current source；By building resistance series connection potential-divider network and passive filter circuit, establish
Line voltage sample circuit simultaneously acquires network voltage sampled signal；By building resistance series connection potential-divider network and copper-manganese piece being arranged
At ideal resistance, establishes firewire current sampling circuit and acquire firewire current sampling signal；By selecting and setting Current
Sensor module builds corresponding resistance series connection potential-divider network, establishes neutral line current sample circuit and acquires neutral line current sampling
Signal；The line voltage sample circuit, firewire current sampling circuit and zero curve are connected according to the schematic diagram of the electric energy meter
Current sampling circuit, sinusoidal voltage source and sinusoidal current source establish the analog circuit model.
Further, it includes: by institute that the operation Saber software, which carries out associative simulation to the associative simulation model,
Network voltage sampled signal, firewire current sampling signal and neutral line current sampled signal is stated to be sent in the Simulink software
The digital circuit models；The calculation formula of voltage effective value, current effective value, active power and reactive power is discrete
Change, the calculation formula of voltage effective value, current effective value, active power after obtaining discretization and reactive power；It will be described
Network voltage sampled signal, firewire current sampling signal and neutral line current sampled signal substitute into the voltage after the discretization respectively
Virtual value, current effective value, active power and reactive power calculation formula, calculate voltage effective value, current effective value, have
Function power and reactive power, and send result to the analog circuit model in the Saber software；Described in setting
The simulation step length of Simulink software and Saber software carries out associative simulation to the associative simulation model.
Further, the voltage effective value after the discretization, current effective value, active power and reactive power meter
Calculate formula are as follows:
In formula: P is active power；Q is reactive power；IRMSFor current effective value；URMSFor voltage effective value；U (t) is wink
When voltage；I (t) is transient current；U (k) is instantaneous voltage sampled value；I (k) is transient current sampled value；T is voltage and current letter
Number period；N is the sampling number in a primitive period；Δ t is sampling time interval.
In order to achieve the above object, it is also proposed that a kind of simulator of electric energy meter metering circuit, comprising: schematic diagram and ginseng
Number obtains module, for obtaining the schematic diagram of electric energy meter and the parameter of A/D conversion circuit；Digital circuit models establish module, use
In the digital circuit models for establishing A/D conversion circuit in Simulink software according to the parameter；Analog circuit model foundation
Module establishes analog circuit model for the schematic diagram according to the electric energy meter in Saber software；Associative simulation model is built
Formwork erection block, for using the SaberCosim module in the Saber software to the digital circuit in Simulink software
Analog circuit model described in model and Saber software carries out data connection, the digital circuit models and analog circuit model
Collectively constitute associative simulation model；Simulation run module carries out the associative simulation model for running the Saber software
Associative simulation, and calculate the simulation result of the electric energy meter metering circuit.
Further, it includes: parameter acquisition module that the digital circuit models, which establish module, for obtaining the electric energy meter
A/D conversion circuit normal voltage, register digit and data renewal frequency；Mathematical model constructing module is used for basis
The normal voltage, register digit and data renewal frequency use the number electricity of MATLAB language construct A/D conversion circuit
Road model, and the voltage amplification factor of the digital circuit models, firewire current amplification factor, neutral line current times magnification are set
Number.
Further, the analog circuit model building module includes: signal excitation setup module, for sinusoidal electricity to be arranged
Potential source, sinusoidal current source；Voltage sampling circuit establishes module, for by building resistance series connection potential-divider network and passive filtering electricity
Road establishes line voltage sample circuit and acquires network voltage sampled signal；Firewire current sampling circuit establishes module, for leading to
It crosses and builds resistance series connection potential-divider network and copper-manganese piece is arranged to ideal resistance, establish firewire current sampling circuit and acquires firewire
Current sampling signal；Neutral line current sample circuit establishes module, for taking by selecting and setting Current Sensor module
Corresponding resistance series connection potential-divider network is built, neutral line current sample circuit is established and acquires neutral line current sampled signal；Simulation model
Module is established, for connecting the line voltage sample circuit, firewire current sampling circuit according to the schematic diagram of the electric energy meter
And neutral line current sample circuit, sinusoidal voltage source and sinusoidal current source, establish analog circuit model.
Further, the simulation run module includes: signal transmitting module, is believed for sampling the network voltage
Number, firewire current sampling signal and neutral line current sampled signal be sent to the digital circuit mould in the Simulink software
Type；Formula descretization module, for by the calculation formula of voltage effective value, current effective value, active power and reactive power
Discretization, the calculation formula of voltage effective value, current effective value, active power after obtaining discretization and reactive power；Letter
Number computing module, for by the network voltage sampled signal, firewire current sampling signal and neutral line current sampled signal difference
The calculation formula of voltage effective value, current effective value, active power after substituting into the discretization and reactive power calculates electricity
It is pressed with valid value, current effective value, active power and reactive power, and is sent result to described in the Saber software
Analog circuit model；Associative simulation module, for the simulation step length of the Simulink software and Saber software to be arranged, to institute
It states associative simulation model and carries out associative simulation.
Further, the voltage effective value after the discretization, current effective value, active power and reactive power meter
Calculate formula are as follows:
In formula: P is active power；Q is reactive power；IRMSFor current effective value；URMSFor voltage effective value；U (t) is wink
When voltage；I (t) is transient current；U (k) is instantaneous voltage sampled value；I (k) is transient current sampled value；T is voltage and current letter
Number period；N is the sampling number in a primitive period；Δ t is sampling time interval.
The emulation mode and device of the electric energy meter metering circuit of the embodiment of the present invention, by being carried out with Saber emulation platform
The emulation of analog circuit, and the digital mistake in conjunction with Simulink during the advantage in terms of software control algorithm carrys out analog measurement
The data of two softwares are swapped transmitting using SaberCosim module by journey, and the advantage realized between simulation software is mutual
It mends, so that more accurate to the simulation of intelligent electric meter metering process.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only
Some embodiments of the present invention, for those of ordinary skill in the art, without any creative labor, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the flow chart of the emulation mode of the electric energy meter metering circuit of the embodiment of the present invention.
Fig. 2 is the Saber-Simulink associative simulation schematic diagram of the embodiment of the present invention.
Fig. 3 is the structural schematic diagram of the simulator of the electric energy meter metering circuit of the embodiment of the present invention.
Fig. 4 is that the digital circuit models of the embodiment of the present invention establish the structural schematic diagram of module.
Fig. 5 is the structural schematic diagram of the analog circuit model building module of the embodiment of the present invention.
Fig. 6 is the structural schematic diagram of the simulation run module of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment belongs to the range of protection of the invention.
Fig. 1 is the flow chart of the emulation mode of the electric energy meter metering circuit of the embodiment of the present invention, as shown in Figure 1, this implementation
The emulation mode for the electric energy meter metering circuit that example proposes, comprising:
S100 obtains the schematic diagram of electric energy meter and the parameter of A/D conversion circuit；
S200 establishes the digital circuit models of A/D conversion circuit according to the parameter in Simulink software；
S300 establishes analog circuit model according to the schematic diagram of the electric energy meter in Saber software；
S400, using the SaberCosim module in the Saber software to the number electricity in Simulink software
Analog circuit model described in road model and Saber software carries out data connection, the digital circuit models and analog circuit mould
Type collectively constitutes associative simulation model；
S500 runs the Saber software and carries out associative simulation to the associative simulation model, and calculates the electric energy meter
The simulation result of metering circuit.
In the step s 100, the schematic diagram of electric energy meter and the parameter of A/D conversion circuit are obtained.The circuit part of electric energy meter by
A/D conversion circuit and analog circuit two parts are constituted, and those skilled in the art can voluntarily obtain the schematic diagram of electric energy meter, and root
The parameter of A/D conversion circuit, the acquisition modes of these parameters are determined according to the chip handbook of metering chip used in electric energy meter
It can or access related data in kind by measurement.The parameter includes normal voltage, register digit, data renewal frequency.
In step s 200, the digital circuit mould of A/D conversion circuit is established in Simulink software according to the parameter
Type.Those skilled in the art use the M-Function module of Matlab language construct digital circuit models, the M-Function
Gradually comparison A/D conversion circuit algorithm makes the digital circuit models established realize that analog quantity turns to digital quantity for module control
It changes.The foundation of the simulation model to electric energy meter digital circuit can be completed as a result,.
In step S200 specific implementation process, the parameter of the A/D conversion circuit of electric energy meter is obtained, and according to the parameter
The step of digital circuit models of A/D conversion circuit are established in Simulink software includes: A/D turns for obtaining the electric energy meter
Change the normal voltage, register digit and data renewal frequency of circuit；According to the normal voltage, register digit and number
According to renewal frequency, using the digital circuit models of MATLAB language construct A/D conversion circuit, and the digital circuit models are set
Voltage amplification factor, firewire current amplification factor, neutral line current amplification factor.
In step S300, according to the schematic diagram of the electric energy meter, analog circuit model is established in Saber software.Root
According to the schematic diagram of the electric energy meter obtained in the step s 100, by the artificial circuit part of schematic diagram in Saber software into
Row is built, to complete analog circuit model.
In step S300 specific implementation process, according to the schematic diagram of the electric energy meter, simulation is established in Saber software
The step of circuit model includes:
Sinusoidal voltage source, sinusoidal current source is arranged in step S310.According to the intelligent electric meter principle analysis, with sinusoidal electricity
Potential source simulating grid voltage simulates firewire and neutral line current with sinusoidal current source.
Step S320 establishes line voltage sample circuit by building resistance series connection potential-divider network and passive filter circuit
And network voltage sampled signal is acquired, sampled signal is extracted by the way of multilevel resistance partial pressure, and passive filter circuit is added.
Step S330 establishes firewire electricity by building resistance series connection potential-divider network and copper-manganese piece being arranged to ideal resistance
Stream sample circuit simultaneously acquires firewire current sampling signal, for firewire current sampling circuit, according to the intelligent electric meter schematic diagram,
It is measured key components copper-manganese piece and is arranged to ideal resistance, and build corresponding resistance pressure-dividing network.
Step S340 builds corresponding resistance series connection potential-divider network by selecting and set Current Sensor module,
It establishes neutral line current sample circuit and acquires neutral line current sampled signal, for neutral line current sample circuit, pass through selection
The suitable variation of Current Sensor module setting, obtains low current signal, builds corresponding resistor potential-divider network；
Step S350 connects the line voltage sample circuit, firewire current sample according to the schematic diagram of the electric energy meter
Circuit and neutral line current sample circuit, sinusoidal voltage source and sinusoidal current source establish the analog circuit model.
Step S360 connects the line voltage sample circuit, firewire current sample according to the schematic diagram of the electric energy meter
Circuit and neutral line current sample circuit, sinusoidal voltage source and sinusoidal current source, establish analog circuit model.
In step S400, using the SaberCosim module in the Saber software to the institute in Simulink software
It states analog circuit model described in digital circuit models and Saber software and carries out data connection, the digital circuit models and mould
Quasi- circuit model collectively constitutes associative simulation model.Since the foundation of digital circuit models is the simulation in Simulink software
The foundation of circuit model is to use SaberCosim software as the interface software of above two software in Saber software, use
With the data of digital circuit models and analog circuit model.The digital circuit mould that step S200, step S300 have been had built up
Type is attached with analog circuit model, constructs associative simulation model.After the building for completing associative simulation model, enter step
S500 runs the Saber software and carries out associative simulation to the associative simulation model, and calculates the electric energy meter metering circuit
Simulation result.
In step S400 specific implementation process, the SaberCosim module pair in the Saber software is used
Analog circuit model described in the digital circuit models and Saber software in Simulink software carries out data connection, institute
It states digital circuit models and analog circuit model collectively constitutes associative simulation model.
Firstly, the network voltage sampled signal, firewire current sampling signal and neutral line current sampled signal are sent to
The digital circuit models in the Simulink software；
Then, it by the calculation formula discretization of voltage effective value, current effective value, active power and reactive power, obtains
The calculation formula of voltage effective value, current effective value, active power after to discretization and reactive power.The formula are as follows:
In formula: P is active power；Q is reactive power；IRMSFor current effective value；URMSFor voltage effective value；U (t) is wink
When voltage；I (t) is transient current；U (k) is instantaneous voltage sampled value；I (k) is transient current sampled value；T is voltage and current letter
Number period；N is the sampling number in a primitive period；Δ t is sampling time interval.
Finally, by the network voltage sampled signal, firewire current sampling signal and neutral line current sampled signal generation respectively
The calculation formula of voltage effective value, current effective value, active power after entering the discretization and reactive power calculates voltage
Virtual value, current effective value, active power and reactive power, and send result to the mould in the Saber software
Quasi- circuit model；The simulation step length of the Simulink software and Saber software is set, the associative simulation model is joined
Close emulation.
Although it should be noted that being above illustrated to the elaboration of embodiment according to sequence of steps, simultaneously
Emulation mode of the invention, the sequencing that the present invention implements each step must be just able to achieve according to sequence described above by not representing
Without limitation.
Fig. 2 is the Saber-Simulink associative simulation schematic diagram of the embodiment of the present invention, in conjunction with Fig. 1 and Fig. 2, to the present invention
The emulation mode of electric energy meter metering circuit be described further.Refering to what is shown in Fig. 2, the simulation model master of electric energy meter metering circuit
It is divided into three parts: artificial circuit part, digital circuits section and emulation interface.Digital circuit models and analog circuit model
Collectively constitute associative simulation model, wherein artificial circuit part includes: that manganese copper diverter equivalent model, current transformer are equivalent
Model, resistance pressure-dividing network and analog signal excitation；Digital circuits section includes: metering chip Simulink model, micro-control
Device Simulink model processed.Emulation interface is Saber-MATLAB/Simulink emulation interface.
After obtaining the parameter of schematic diagram and A/D conversion circuit of electric energy meter, taken first using the parameter of A/D conversion circuit
Build digital circuit models, wherein metering chip Simulink model and microcontroller Simulink model have collectively constituted number
Circuit model uses MATLAB language construct according to the normal voltage, register digit and data renewal frequency
Simulink model and microcontroller Simulink model, and the voltage amplification factor of the digital circuit models, firewire are set
Current amplification factor, neutral line current amplification factor；Then analog circuit model is constructed using electric energy meter schematic diagram.Wherein, it is arranged
Sinusoidal voltage source, sinusoidal current source are motivated as analog signal, are used to simulating grid voltage and electric current, are established manganese copper diverter
Equivalent model, for simulating the copper-manganese piece current sample part in ammeter；According to schematic diagram, current transformer equivalent model is set,
For simulating the current transformer current sample part in electric energy meter；Resistance pressure-dividing network is constructed as network voltage and samples electricity
Road, for simulating multilevel resistance pressure sampling circuit part in ammeter.Completion digital circuit models are taken with analog circuit model
After building, it is emulation interface by setting Saber-MATLAB/Simulink, realizes digital circuit models and analog circuit model
Data connection.
After completing electric energy meter associative simulation model, runs the Saber software and the associative simulation model is combined
Emulation, the transmission sequence of specific data are as follows: analog circuit model will be surveyed by Saber-MATLAB/Simulink emulation interface
Network voltage sampled signal, firewire current sampling signal and the neutral line current sampled signal measured are transferred to digital circuit models.
Metering chip Simulink model in following digital circuit models to voltage effective value, current effective value, active power with
And the calculation formula discretization of reactive power, then by the voltage value of network voltage sampled signal, firewire current sampling signal
Voltage effective value, current effective value, active power after current value and the current value of neutral line current sampled signal substitution discretization
And the calculation formula of reactive power, voltage effective value, current effective value, active power and reactive power are obtained, then should
A little parameters return to analog circuit model by Saber-MATLAB/Simulink emulation interface and carry out to the data of calculating
It updates.Above-mentioned process is repeated with this, operation emulation is carried out with the simulation step length of the Simulink of setting and Saber, until arriving
Up to the iterative steps or the condition of convergence of setting, to complete the emulation of energy table metering circuit.Illustrate herein, electric energy meter joint is imitative
During being emulated, the transmission for calculating data is not limited to digital circuit models and analog circuit model in true mode
State the data transfer sequence of two models.
After describing the emulation mode of electric energy meter metering circuit of the embodiment of the present invention, next, to of the invention real
The simulator for applying the electric energy meter metering circuit of example is introduced.The implementation of the device may refer to the implementation of the above method, weight
Multiple place repeats no more.Term " module " used below, " unit " can be the software for realizing predetermined function and/or hard
Part.
Fig. 3 is the structural schematic diagram of the simulator of the electric energy meter metering circuit of the embodiment of the present invention, as shown in figure 3, one
The simulator of kind electric energy meter metering circuit, comprising: schematic diagram and parameter acquisition module 100, for obtaining the principle of electric energy meter
The parameter of figure and A/D conversion circuit；Digital circuit models establish module 200, are used for according to the parameter in Simulink software
The middle digital circuit models for establishing A/D conversion circuit；Analog circuit model building module 300, for according to the electric energy meter
Schematic diagram establishes analog circuit model in Saber software；Associative simulation model building module 400, for described in use
SaberCosim module in Saber software is to institute in the digital circuit models and Saber software in Simulink software
It states analog circuit model and carries out data connection, the digital circuit models and analog circuit model collectively constitute associative simulation mould
Type；Simulation run module 500 carries out associative simulation to the associative simulation model for running the Saber software, and calculates
The simulation result of the electric energy meter metering circuit.
In the specific implementation process, Fig. 4 is that the digital circuit models of the embodiment of the present invention establish the structural schematic diagram of module,
As shown in figure 4, it includes: parameter acquisition module 210 that the digital circuit models, which establish module 200, for obtaining the electric energy meter
A/D conversion circuit normal voltage, register digit and data renewal frequency；Mathematical model constructing module 220 is used for root
According to the normal voltage, register digit and data renewal frequency, the number of MATLAB language construct A/D conversion circuit is used
Circuit model, and the voltage amplification factor of the digital circuit models, firewire current amplification factor, neutral line current times magnification are set
Number.
In the specific implementation process, Fig. 5 is the structural schematic diagram of the analog circuit model building module of the embodiment of the present invention,
As shown in figure 5, the analog circuit model building module 300 includes: signal excitation setup module 310, for sinusoidal electricity to be arranged
Potential source, sinusoidal current source；Voltage sampling circuit establishes module 320, for by building resistance series connection potential-divider network and passive filter
Wave circuit establishes line voltage sample circuit and acquires network voltage sampled signal；Firewire current sampling circuit establishes module
330, for establishing firewire current sampling circuit by building resistance series connection potential-divider network and copper-manganese piece being arranged to ideal resistance
And acquire firewire current sampling signal；Neutral line current sample circuit establishes module 340, for by selecting and setting Current
Sensor module builds corresponding resistance series connection potential-divider network, establishes neutral line current sample circuit and acquires neutral line current sampling
Signal；Simulation model establishes module 350, for according to the schematic diagram of the electric energy meter connect the line voltage sample circuit,
Firewire current sampling circuit and neutral line current sample circuit, sinusoidal voltage source and sinusoidal current source, establish analog circuit mould
Type.
In the specific implementation process, Fig. 6 is the structural schematic diagram of the simulation run module of the embodiment of the present invention, such as Fig. 6 institute
Show, the simulation run module 500 includes: signal transmitting module 510, for the network voltage sampled signal, firewire is electric
Stream sampled signal and neutral line current sampled signal are sent to the digital circuit models in the Simulink software；Formula from
Dispersion module 520, for by the calculation formula discretization of voltage effective value, current effective value, active power and reactive power,
The calculation formula of voltage effective value, current effective value, active power after obtaining discretization and reactive power；Signal calculates mould
Block 530, for the network voltage sampled signal, firewire current sampling signal and neutral line current sampled signal to be substituted into institute respectively
It is effective to calculate voltage for the calculation formula of voltage effective value, current effective value, active power after stating discretization and reactive power
Value, current effective value, active power and reactive power, and send result to the electricity of the simulation in the Saber software
Road model；Associative simulation module 540, for the simulation step length of the Simulink software and Saber software to be arranged, to described
It closes simulation model and carries out associative simulation.
In the specific implementation process, the voltage effective value after the discretization, current effective value, active power and idle
The calculation formula of power are as follows:
In formula: P is active power；Q is reactive power；IRMSFor current effective value；URMSFor voltage effective value；U (t) is wink
When voltage；I (t) is transient current；U (k) is instantaneous voltage sampled value；I (k) is transient current sampled value；T is voltage and current letter
Number period；N is the sampling number in a primitive period；Δ t is sampling time interval.
The emulation mode of electric energy meter metering circuit of the invention and the embodiment of device, by with Saber emulation platform into
The emulation of row analog circuit, and the number in conjunction with Simulink during the advantage in terms of software control algorithm carrys out analog measurement
The data of two softwares are swapped transmitting using SaberCosim module, realize the advantage between simulation software by process
Complementation, so that more accurate to the simulation of intelligent electric meter metering process.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of emulation mode of electric energy meter metering circuit characterized by comprising
Obtain the schematic diagram of electric energy meter and the parameter of A/D conversion circuit；
The digital circuit models of A/D conversion circuit are established in Simulink software according to the parameter；
According to the schematic diagram of the electric energy meter, analog circuit model is established in Saber software；
Using the SaberCosim module in the Saber software in Simulink software the digital circuit models with
Analog circuit model described in Saber software carry out data connection, the digital circuit models with common group of analog circuit model
At associative simulation model；
It runs the Saber software and associative simulation is carried out to the associative simulation model, and calculate the electric energy meter metering circuit
Simulation result.
2. the emulation mode of electric energy meter metering circuit according to claim 1, which is characterized in that obtain the A/D of electric energy meter
The parameter of conversion circuit, and the digital circuit models of A/D conversion circuit are established according to the parameter in Simulink software
Step includes:
Obtain the normal voltage, register digit and data renewal frequency of the A/D conversion circuit of the electric energy meter；
According to the normal voltage, register digit and data renewal frequency, MATLAB language construct A/D conversion circuit is used
Digital circuit models, and the voltage amplification factor of the digital circuit models, firewire current amplification factor, neutral line current are set
Amplification factor.
3. the emulation mode of electric energy meter metering circuit according to claim 1, which is characterized in that described according to the electric energy
The schematic diagram of table, the step of analog circuit model is established in Saber software include:
Sinusoidal voltage source, sinusoidal current source are set；
By building resistance series connection potential-divider network and passive filter circuit, establishes line voltage sample circuit and acquire network voltage
Sampled signal；
By building resistance series connection potential-divider network and copper-manganese piece being arranged to ideal resistance, establish firewire current sampling circuit and is adopted
Collect firewire current sampling signal；
By selecting and setting Current Sensor module, corresponding resistance series connection potential-divider network is built, neutral line current is established
Sample circuit simultaneously acquires neutral line current sampled signal；
The line voltage sample circuit, firewire current sampling circuit and zero curve electricity are connected according to the schematic diagram of the electric energy meter
Sample circuit, sinusoidal voltage source and sinusoidal current source are flowed, the analog circuit model is established.
4. the emulation mode of electric energy meter metering circuit according to claim 3, which is characterized in that described in the operation
Saber software carries out associative simulation to the associative simulation model
The network voltage sampled signal, firewire current sampling signal and neutral line current sampled signal are sent to described
The digital circuit models in Simulink software；
By the calculation formula discretization of voltage effective value, current effective value, active power and reactive power, after obtaining discretization
Voltage effective value, current effective value, active power and reactive power calculation formula；
The network voltage sampled signal, firewire current sampling signal and neutral line current sampled signal are substituted into respectively described discrete
The calculation formula of voltage effective value, current effective value, active power after change and reactive power calculates voltage effective value, electricity
Virtual value, active power and reactive power are flowed, and sends result to the analog circuit mould in the Saber software
Type；
The simulation step length of the Simulink software and Saber software is set, associative simulation is carried out to the associative simulation model.
5. the emulation mode of electric energy meter metering circuit according to claim 4, which is characterized in that the electricity after the discretization
It is pressed with the calculation formula of valid value, current effective value, active power and reactive power are as follows:
In formula: P is active power；Q is reactive power；IRMSFor current effective value；URMSFor voltage effective value；U (t) is instantaneous electricity
Pressure；I (t) is transient current；U (k) is instantaneous voltage sampled value；I (k) is transient current sampled value；T is voltage and current signal week
Phase；N is the sampling number in a primitive period；Δ t is sampling time interval.
6. a kind of simulator of electric energy meter metering circuit characterized by comprising
Schematic diagram and parameter acquisition module, for obtaining the schematic diagram of electric energy meter and the parameter of A/D conversion circuit；
Digital circuit models establish module, for establishing the number of A/D conversion circuit in Simulink software according to the parameter
Miter circuit model；
Analog circuit model building module establishes analog circuit in Saber software for the schematic diagram according to the electric energy meter
Model；
Associative simulation model building module, for using the SaberCosim module in the Saber software soft to Simulink
Analog circuit model described in the digital circuit models and Saber software in part carries out data connection, the digital circuit
Model and analog circuit model collectively constitute associative simulation model；
Simulation run module carries out associative simulation to the associative simulation model for running the Saber software, and calculates institute
State the simulation result of electric energy meter metering circuit.
7. the simulator of electric energy meter metering circuit according to claim 6, which is characterized in that the digital circuit models
Establishing module includes:
Parameter acquisition module, normal voltage, register digit and the data of the A/D conversion circuit for obtaining the electric energy meter
Renewal frequency；
Mathematical model constructing module, for using according to the normal voltage, register digit and data renewal frequency
The digital circuit models of MATLAB language construct A/D conversion circuit, and be arranged the digital circuit models voltage amplification factor,
Firewire current amplification factor, neutral line current amplification factor.
8. the simulator of electric energy meter metering circuit according to claim 6, which is characterized in that the analog circuit model
Establishing module includes:
Signal motivates setup module, for sinusoidal voltage source, sinusoidal current source to be arranged；
Voltage sampling circuit establishes module, for establishing power grid by building resistance series connection potential-divider network and passive filter circuit
Voltage sampling circuit simultaneously acquires network voltage sampled signal；
Firewire current sampling circuit establishes module, for by building resistance series connection potential-divider network and copper-manganese piece being arranged to ideal
Resistance establishes firewire current sampling circuit and acquires firewire current sampling signal；
Neutral line current sample circuit establishes module, for building corresponding by selecting and setting Current Sensor module
Resistance series connection potential-divider network, establishes neutral line current sample circuit and acquires neutral line current sampled signal；
Simulation model establishes module, for connecting the line voltage sample circuit, firewire according to the schematic diagram of the electric energy meter
Current sampling circuit and neutral line current sample circuit, sinusoidal voltage source and sinusoidal current source, establish analog circuit model.
9. the simulator of electric energy meter metering circuit according to claim 8, which is characterized in that the simulation run module
Include:
Signal transmitting module is believed for sampling the network voltage sampled signal, firewire current sampling signal and neutral line current
The digital circuit models number being sent in the Simulink software；
Formula descretization module, for by the calculation formula of voltage effective value, current effective value, active power and reactive power
Discretization, the calculation formula of voltage effective value, current effective value, active power after obtaining discretization and reactive power；
Signal computing module is believed for sampling the network voltage sampled signal, firewire current sampling signal and neutral line current
The calculation formula of voltage effective value, current effective value, active power after number substituting into the discretization respectively and reactive power,
Voltage effective value, current effective value, active power and reactive power are calculated, and is sent result in the Saber software
The analog circuit model；
Associative simulation module, for the simulation step length of the Simulink software and Saber software to be arranged, to the associative simulation
Model carries out associative simulation.
10. the simulator of electric energy meter metering circuit according to claim 9, which is characterized in that after the discretization
Voltage effective value, current effective value, active power and reactive power calculation formula are as follows:
In formula: P is active power；Q is reactive power；IRMSFor current effective value；URMSFor voltage effective value；U (t) is instantaneous electricity
Pressure；I (t) is transient current；U (k) is instantaneous voltage sampled value；I (k) is transient current sampled value；T is voltage and current signal week
Phase；N is the sampling number in a primitive period；Δ t is sampling time interval.
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| CN109683118A (en) * | 2018-12-10 | 2019-04-26 | 国网冀北电力有限公司电力科学研究院 | Based on the improved electric energy meter protection feature optimization method and device of transformer |
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