CN108717172A - A kind of mutual inductor dynamic error test system and method - Google Patents
A kind of mutual inductor dynamic error test system and method Download PDFInfo
- Publication number
- CN108717172A CN108717172A CN201810332778.0A CN201810332778A CN108717172A CN 108717172 A CN108717172 A CN 108717172A CN 201810332778 A CN201810332778 A CN 201810332778A CN 108717172 A CN108717172 A CN 108717172A
- Authority
- CN
- China
- Prior art keywords
- signal
- standard
- dynamic
- input
- waveform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012360 testing method Methods 0.000 title claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 50
- 238000012795 verification Methods 0.000 claims abstract description 41
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 42
- 238000012797 qualification Methods 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 4
- 238000012937 correction Methods 0.000 claims description 3
- 241001274660 Modulus Species 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- 238000004088 simulation Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920001070 Techron Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a kind of mutual inductor dynamic errors to test system and method, the system comprises dynamic waveform signal source, signal processing unit, standard mutual inductor unit and dynamic error verification unit, the dynamic waveform signal source generates dynamic waveform signal for simulating various dynamic loads in several ways；The signal processing unit is used to generate the processing signal for being suitable for the input of mutual inductor primary side according to dynamic waveform signal；The mutual inductor that the standard mutual inductor unit is used to provide standard exports object as a comparison；The dynamic error verification unit is used to carry out error analysis, and output error data with to-be-tested transformer output according to the standard mutual inductor output under identical input；The system and method realizes and carries out dynamic error test to electric power mutual-inductor under simulation electric system access dynamic load, and the influence for assessment dynamic load to electric power mutual-inductor metering performance provides technological means.
Description
Technical field
The present invention relates to technical field of electric power, and system and method is tested more particularly, to a kind of mutual inductor dynamic error.
Background technology
With the extensive application of power electronic equipment and other novel electric power apparatus in the power system, part throttle characteristics becomes
It becomes increasingly complex.It is harmonic source load that existing research, which discusses at most, is mainly derived from nonlinear power electronic equipment, contains
Alternating current arc and ferromagnetic non-linear equipment, specifically there is steel mill, chemical plant, electric railway etc..When sinusoidal fundamental wave voltage is applied
When being added on non-linear equipment, former simple sinusoidal alternating current waveform can be distorted, the voltage waveform for the electric current and application that equipment absorbs
Difference in harmonic current injection to power grid, will result in voltage, current sinusoidal wave distortion, these equipment are just at power train
The harmonic source of system loads.And in practical power systems, system total load always plus is formed by various loads of different nature, characteristic
It can be more complicated.
By the way that a large amount of measured datas are carried out with basic frequency analysis, the respective harmonic content of statistics voltage, electric current, and according to
The non-linear specific load of power grid is tentatively divided into two kinds by the wave character of current sampling signal：Harmonic Type and dynamic type.Harmonic Type
The essential characteristic of load is that voltage contains a small amount of harmonic wave, and electric current contains a large amount of harmonic waves, and electric current is steady non-sine periodic signal；It is dynamic
The essential characteristic of state type load is that voltage contains a small amount of harmonic wave, and electric current contains a large amount of harmonic waves, and electric current is non-stationary, non-sine, non-
Period (part) signal, it is special as dynamic envelope characteristic is presented in current signal.Based on the above-mentioned statistics to power grid actual loading
Analysis, basic Harmonic Type load has been unsatisfactory for the feature description to special dynamic type load, and part is due to amplitude or frequency
Rate changes caused signal localised waving, and the Dynamic Signal accounting of unstable condition is presented increasingly in signal certain time length
It is more；The error character that existing mutual inductor shows under Harmonic Type load and dynamic type load has differences, but existing
Error testing system, it is difficult to which satisfaction carries out accurate dynamic error measurement under dynamic load.
Invention content
In order to solve existing error testing system existing for background technology, it is difficult to meet and be carried out accurately under dynamic load
Dynamic error measure the problem of, the present invention provides a kind of mutual inductor dynamic error test system and method, the method and
System can be simulated various dynamic loads in several ways by actual demand and generate dynamic waveform signals, by with standard mutual inductor
The comparison of device secondary side output obtains the error result under dynamic load, a kind of mutual inductor dynamic error test system packet
It includes：
Dynamic waveform signal source, the dynamic waveform signal source include that input module, signal source control module and DA turn
Change the mold block；The input module is used to receive the dynamic waveform parameter of preset format, and the dynamic waveform parameter is sent to
Signal source control module；The signal source control module generates dynamic waveform signal according to the dynamic waveform parameter, and to DA
Conversion module sends the dynamic waveform signal；The DA conversion modules answer analog waveform to believe according to dynamic waveform signal the output phase
Number；The dynamic waveform parameter includes fundamental frequency, fundamental voltage amplitude, fundamental phase, overtone order and the corresponding width of each harmonic
Value vector and harmonic content；
Signal processing unit, the signal processing unit is for pressing the analog waveform signal that dynamic waveform signal source exports
It is handled according to preset rules, obtains the processing signal for being suitable for the input of mutual inductor primary side；The output of the signal processing unit
End is connected with the input terminal of the input terminal of standard mutual inductor unit and to-be-tested transformer；
Standard mutual inductor unit, the standard mutual inductor unit are used for according to the processing in the input of standard mutual inductor primary side
Signal, in standard mutual inductor secondary side outputting standard signal；
Dynamic error verification unit, the dynamic error verification unit include signal conversion module, AD acquisition modules, verification
Control module and qualification module；
The signal conversion module includes standard input port and input port to be measured, the standard input port and institute
The output end for stating standard mutual inductor is connected, and the input port to be measured is connected with to-be-tested transformer；The signal conversion module is used
In the standard small signal that the standard signal of input is converted to preset format；The signal conversion module is to be measured for that will input
Signal is converted to the small signal to be measured of preset format；
The verification control module is used to send the instruction of AD acquisition controls to AD acquisition modules according to preset rules；The school
Control module is tested for sending verification control instruction to performance correction verification module according to preset rules；
The AD acquisition modules are used to send the standard small signal and small signal to be measured according to verification control module
AD acquisition controls instruction be converted to standardized digital signal and digital signal to be measured；
The verification control instruction that the qualification module is used to be sent according to verification control module is to the standard digital
Signal and digital signal to be measured carry out error analysis, and output error data.
Further, the signal processing unit includes power amplifier and booster；The power amplifier is used for
The analog waveform signal that dynamic waveform signal source exports is amplified according to preset gain；The booster is used for power
Amplified analog waveform signal boosts according to preset rules, obtains voltage and handles signal；
The standard mutual inductor unit includes standard potential transformer, and the standard potential transformer is used at according to voltage
Manage signal outputting standard voltage signal；
The standard input port of the signal conversion module includes normal voltage input port；The input port packet to be measured
Include control source port to be measured；The signal conversion module is used to be converted to the standard voltage signal of input the mark of preset format
Quasi- small voltage signal；The signal conversion module is used to be converted to the voltage signal to be measured of input the small electricity to be measured of preset format
Press signal；
Further, the signal processing unit includes power amplifier and current lifting device；The power amplifier is used for
The analog waveform signal that dynamic waveform signal source exports is amplified according to preset gain；The current lifting device is used for power
Amplified analog waveform signal is flowed up according to preset rules, obtains current processing signal；
The standard mutual inductor unit includes standard current transformer, and the standard potential transformer is used at according to electric current
Manage signal outputting standard current signal；
The standard input port of the signal conversion module includes normalized current input port；The input port packet to be measured
Include current input terminal mouth to be measured；The signal conversion module is used to be converted to the standard current signal of input the mark of preset format
Quasi- low current signal；The signal conversion module is used to be converted to the current signal to be measured of input the small electricity to be measured of preset format
Flow signal；
Further, the input module includes parameter input submodule and function input submodule；
The parameter input submodule described will be moved for receiving the dynamic waveform parameter that user is keyed in by preset format
State waveform parameter is sent to signal source control module；
The function input submodule is used to receive multigroup function formula of in chronological sequence sequence combination input by user,
And the function formula is sent to signal source control module, the signal source control module is obtained according to the resolving of function formula
Obtain dynamic waveform parameter；
Further, the input module includes Freehandhand-drawing Waveform Input submodule；
The Freehandhand-drawing Waveform Input submodule includes touch screen sensor and capture card；The touch screen sensor receives user
The waveform drawn on it, and the waveform is converted into waveform electric signal and is sent to capture card；The capture card is according to
Waveform Electric signal processing, which calculates, obtains dynamic waveform parameter, and the dynamic waveform parameter is sent to signal source control module；
Further, the verification control module is generated according to the preset sampling parameter including cycle and sample rate
AD acquisition controls instruct；The verification control module according to it is preset include for the ranges of different transformer types, no-load voltage ratio with
And the checking parameter of signal path generates verification control instruction；
A kind of mutual inductor dynamic error test method includes：
The dynamic waveform parameter for receiving preset format generates dynamic waveform signal according to the dynamic waveform parameter, and leads to
It crosses DA conversions and the dynamic waveform signal is converted into analog waveform signal；The dynamic waveform parameter includes fundamental frequency, base
Wave amplitude, fundamental phase, overtone order and the corresponding amplitude vector of each harmonic and harmonic content；
The analog waveform signal is separately input into the input terminal of standard transducer and biography to be measured by signal processing
The input terminal of sensor；
The standard signal of standard transducer output end output and the measured signal of sensor output to be measured output are received,
After the standard signal and measured signal are carried out signal processing and AD samplings, standard secretary signal and number letter to be measured are generated
Number；
Error analysis, and output error data are carried out to the standardized digital signal and digital signal to be measured.
Further, described to carry out analog waveform signal at signal when the to-be-tested transformer is voltage transformer
Managing the input terminal of input terminal and sensor to be measured for being separately input into standard transducer further includes：Analog waveform signal is according to pre-
If gain be amplified and boost according to preset rules, obtain voltage handle signal；By voltage processing signal point
It is not input to the input terminal of normal voltage sensor and the input terminal of voltage sensor to be measured；
Further, described to carry out analog waveform signal at signal when the to-be-tested transformer is current transformer
Managing the input terminal of input terminal and sensor to be measured for being separately input into standard transducer further includes：Analog waveform signal is according to pre-
If gain be amplified and boost according to preset rules, obtain voltage handle signal；By voltage processing signal point
It is not input to the input terminal of normal voltage sensor and the input terminal of voltage sensor to be measured；
Further, the dynamic waveform parameter for receiving preset format further includes：
It receives user and presses the dynamic waveform parameter that preset format is keyed in；
Multigroup function formula of in chronological sequence sequence combination input by user is received, and according to the resolving to function formula
Obtain dynamic waveform parameter；
The waveform that user draws in touch screen sensor is received, the waveform is converted into waveform electric signal and handles calculating
Obtain dynamic waveform parameter.
Beneficial effects of the present invention are：Technical scheme of the present invention gives a kind of mutual inductor dynamic error test system
And method, voltage or electric current when the system and method can simulate electric system access dynamic load according to demand are believed
Number, the error result under dynamic load is obtained by the comparison exported with standard mutual inductor secondary side, electric power mutual-inductor is carried out
Dynamic load error test；Influence for assessment dynamic load to electric power mutual-inductor metering performance provides technological means.
Description of the drawings
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by：
Fig. 1 is that a kind of mutual inductor dynamic error of the specific embodiment of the invention tests the structure chart of system；
Fig. 2 is a kind of flow chart of mutual inductor dynamic error test method of the specific embodiment of the invention.
Specific implementation mode
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be to disclose at large and fully
The present invention, and fully convey the scope of the present invention to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related field has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is that a kind of mutual inductor dynamic error of the specific embodiment of the invention tests the structure chart of system；The system
Various dynamic loads can be simulated in several ways by actual demand and generate dynamic waveform signals, by with standard mutual inductor two
The comparison of secondary side output obtains the error result under dynamic load, and a kind of mutual inductor dynamic error test system includes：
Dynamic waveform signal source 110, the dynamic waveform signal source 110 include input module 111, signal source control module
112 and D/A conversion module 113；The input module 111 is used to receive the dynamic waveform parameter of preset format, and will be described dynamic
State waveform parameter is sent to signal source control module 112；The signal source control module 112 is given birth to according to the dynamic waveform parameter
The dynamic waveform signal is sent at dynamic waveform signal, and to D/A conversion module 113；The DA conversion modules are according to dynamic wave
Shape signal the output phase answers analog waveform signal；The dynamic waveform parameter includes fundamental frequency, fundamental voltage amplitude, fundamental phase, humorous
Wave number and the corresponding amplitude vector of each harmonic and harmonic content；
Further, the input module 111 includes parameter input submodule, function input submodule and Freehandhand-drawing waveform
Input submodule；
The parameter input submodule described will be moved for receiving the dynamic waveform parameter that user is keyed in by preset format
State waveform parameter is sent to signal source control module 112；
This method for obtaining dynamic waveform parameter is the most direct, and the dynamic waveform of specified type is manually typed in by user
Parameter can be obtained；
The function input submodule is used to receive multigroup function formula of in chronological sequence sequence combination input by user,
And the function formula is sent to signal source control module 112, the signal source control module 112 is according to function formula
It resolves and obtains dynamic waveform parameter；
The function input submodule can realize that the model for simulating early period to dynamic load characteristics is directly applied to input
End, no longer needs to manually calculate and inputs parameters；
The Freehandhand-drawing Waveform Input submodule includes touch screen sensor and capture card；The touch screen sensor receives user
The waveform drawn on it, and the waveform is converted into waveform electric signal and is sent to capture card；The capture card is according to
Waveform Electric signal processing, which calculates, obtains dynamic waveform parameter, and the dynamic waveform parameter is sent to signal source control module
112；
The touch screen sensor can be a variety of, be drawn with lettering pen also provided with corresponding touch screen；The touch screen
Transverse and longitudinal coordinate can be shown in advance and be equipped with auxiliary line on demand on sensor；
The Freehandhand-drawing Waveform Input submodule is solved when the characteristic of the dynamic load can not be obtained by way of modeling
It obtains or modeling error is larger, can not ensure in the case of simulating effect, according to the load actual waveform measured in touch screen sensor
On reappeared, to obtain corresponding dynamic waveform；
The mode that the input module 111 is inputted including but not limited to above-mentioned three kinds, completely covers for input table
Show the dynamic waveform of dynamic load characteristics or the various situations of dynamic waveform parameter, ensure that the simulation to the dynamic load of demand
Accuracy；
By taking the present embodiment as an example, the signal source control module 112 by model IPC-510MB industrial personal computer and model
It is formed for the DSP of TMS320LF2407, control software is write using LabVIEW；The touch screen sensor is embedded using Ctfly
Touch screen displays；D/A converter is the D/A converter of model LTC2656-12；
Signal processing unit 120, the simulation that the signal processing unit 120 is used to export dynamic waveform signal source 110
Waveform signal is handled according to preset rules, obtains the processing signal for being suitable for the input of mutual inductor primary side；The signal processing
The output end of unit 120 is connected with the input terminal of the input terminal of standard mutual inductor unit and to-be-tested transformer；
Further, the signal processing unit 120 includes power amplifier, current lifting device and booster；According to be measured
The difference (voltage transformer or current transformer) of mutual inductor, the signal processing unit 120 match current lifting device or booster；Into
One step, can also include current lifting device and booster simultaneously, further according to the different switch operating circuits of to-be-tested transformer；
The analog waveform signal that the power amplifier is used to export dynamic waveform signal source 110 is according to preset gain
It is amplified；The booster obtains electricity for the analog waveform signal after power amplification to boost according to preset rules
Pressure processing signal；The current lifting device is obtained for flowing up the analog waveform signal after power amplification according to preset rules
Current processing signal；
By taking the present embodiment as an example, the power amplifier of the signal processing unit 120 uses AE Techron companies
7796 power amplifiers；Booster uses 50KV testing transformers；Current lifting device uses the punching current lifting device of 1000A；
Standard mutual inductor unit 130, the standard mutual inductor unit 130 are used to input according in standard mutual inductor primary side
Processing signal, in standard mutual inductor secondary side outputting standard signal；
The standard mutual inductor unit 130 includes standard potential transformer and standard current transformer, the standard electric
Mutual inductor is pressed to be used to handle signal outputting standard voltage signal according to voltage；The standard current transformer is used at according to electric current
Manage signal outputting standard current signal；
By taking the present embodiment as an example, 35kV/100V, the 0.005 step voltage mutual inductor of standard potential transformer selection；Standard electric
What current transformer was selected is (5A~2000A)/5A, 0.01S grades of current transformer.
Dynamic error verification unit 140, the dynamic error verification unit 140 include signal conversion module 141, AD acquisitions
Module 142, verification control module 143 and qualification module 144；
The signal conversion module 141 includes standard input port and input port to be measured, the standard input port
It is connected with the output end of the standard mutual inductor, the input port to be measured is connected with to-be-tested transformer；The signal modulus of conversion
Block 141 is used to be converted to the standard signal of input the standard small signal of preset format；The signal conversion module 141 is used for will
The measured signal of input is converted to the small signal to be measured of preset format；
Further, the standard input port of the signal conversion module 141 includes normal voltage input port；It is described to wait for
It includes control source port to be measured to survey input port；The standard voltage signal that the signal conversion module 141 is used to input turns
It is changed to the standard small voltage signal of preset format；The voltage signal to be measured conversion that the signal conversion module 141 is used to input
For the small voltage signal to be measured of preset format；
Further, the standard input port of the signal conversion module 141 includes normalized current input port；It is described to wait for
It includes current input terminal mouth to be measured to survey input port；The standard current signal that the signal conversion module 141 is used to input turns
It is changed to the standard small electric current signal of preset format；The current signal to be measured conversion that the signal conversion module 141 is used to input
For the low current signal to be measured of preset format；
The verification control module 143 is used to send the instruction of AD acquisition controls to AD acquisition modules 142 according to preset rules；
The verification control module 143 is used to send verification control instruction to performance correction verification module 144 according to preset rules；
Further, the verification control module 143 is according to the preset sampling parameter including cycle and sample rate
Generate the instruction of AD acquisition controls；It is described verification control module 143 according to it is preset include for different transformer types range,
The checking parameter of no-load voltage ratio and signal path generates verification control instruction；
The AD acquisition modules 142 are used for the standard small signal and small signal to be measured according to verification control module
The 143 AD acquisition controls instructions sent are converted to standardized digital signal and digital signal to be measured；
The verification control instruction that the qualification module 144 is used to be sent according to verification control module 143 is to the mark
Quasi- digital signal and digital signal to be measured carry out error analysis, and output error data.
By taking the present embodiment as an example, the signal conversion module 141 selects the seven disk inductive voltage dividers of rated voltage 200V
The current divider A40B of FGB-02 and rated current 5A, the 0~120V voltage signals or 0~6A electric currents that mutual inductor secondary side is exported
Signal is converted to the small voltage signal transmission of 1V or so to AD acquisition modules 142；AD acquisition modules 142 use AD9695-1300
A/D chips；Magnificent industrial personal computer IPC-510MB is ground in the verification selection of control module 143；Qualification module 144 uses
TMS320F2812 types DSP.
Fig. 2 is a kind of flow chart of mutual inductor dynamic error test method of the specific embodiment of the invention；Such as Fig. 2 institutes
Show, the method includes：
Step 201, the dynamic waveform parameter for receiving preset format generates dynamic waveform letter according to the dynamic waveform parameter
Number, and converted by DA and the dynamic waveform signal is converted into analog waveform signal；The dynamic waveform parameter includes fundamental wave
Frequency, fundamental voltage amplitude, fundamental phase, overtone order and the corresponding amplitude vector of each harmonic and harmonic content；
Further, the dynamic waveform parameter for receiving preset format includes three kinds of modes：
Mode 1 receives user and presses the dynamic waveform parameter that preset format is keyed in；
Mode 2 receives multigroup function formula of in chronological sequence sequence combination input by user, and according to function formula
Resolving obtain dynamic waveform parameter；
Mode 3 receives the waveform that user draws in touch screen sensor, the waveform is converted into waveform electric signal and is located
Reason, which calculates, obtains dynamic waveform parameter；
Step 202, by the analog waveform signal by signal processing be separately input into the input terminal of standard transducer with
And the input terminal of sensor to be measured；
Further, when the to-be-tested transformer be voltage transformer when, analog waveform signal according to preset gain into
Row amplifies and boosts according to preset rules, obtains voltage and handles signal；Voltage processing signal is separately input into mark
The input terminal of the input terminal of quasi- voltage sensor and voltage sensor to be measured；
Further, when the to-be-tested transformer be current transformer when, analog waveform signal according to preset gain into
Row amplifies and boosts according to preset rules, obtains voltage and handles signal；Voltage processing signal is separately input into mark
The input terminal of the input terminal of quasi- voltage sensor and voltage sensor to be measured；
Step 203, the standard signal and sensor output to be measured of reception standard transducer output end output export
Measured signal, after the standard signal and measured signal are carried out signal processing and AD samplings, generate standard secretary signal and
Digital signal to be measured；
Step 204, error analysis, and output error data are carried out to the standardized digital signal and digital signal to be measured.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the disclosure
Example can be put into practice without these specific details.In some instances, well known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this description.
Those skilled in the art, which are appreciated that, to carry out adaptively the module in the equipment in embodiment
Change and they are arranged in the one or more equipment different from the embodiment.It can be the module or list in embodiment
Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it may be used any
Combination is disclosed to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so to appoint
Where all processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification (including adjoint power
Profit requires, abstract and attached drawing) disclosed in each feature can be by providing the alternative features of identical, equivalent or similar purpose come generation
It replaces.Involved in this specification to the step of number be only used for distinguishing each step, and time being not limited between each step
Or the relationship of logic, restriction unless the context clearly, otherwise the relationship between each step includes various possible situations.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments means to be in the disclosure
Within the scope of and form different embodiments.For example, embodiment claimed in detail in the claims is one of arbitrary
It mode can use in any combination.
The all parts embodiment of the disclosure can be with hardware realization, or to run on one or more processors
Software module realize, or realized with combination thereof.The disclosure is also implemented as executing side as described herein
Some or all equipment or system program (for example, computer program and computer program product) of method.It is such
Realize that the program of the disclosure can may be stored on the computer-readable medium, or can be with the shape of one or more signal
Formula.Such signal can be downloaded from internet website and be obtained, and either be provided on carrier signal or with any other shape
Formula provides.
The disclosure is limited it should be noted that above-described embodiment illustrates rather than the disclosure, and ability
Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.Word "comprising" is not arranged
Except there are element or steps not listed in the claims.Word "a" or "an" before element does not exclude the presence of more
A such element.The disclosure can be by means of including the hardware of several different elements and by means of properly programmed calculating
Machine is realized.If in the unit claim for listing dry systems, several in these systems can be by same
Hardware branch embodies.
The above is only the specific implementation mode of the disclosure, it is noted that for the ordinary skill people of this field
Member for, under the premise of not departing from disclosure spirit, can make several improvements, change and deform, these improve, modification,
It is regarded as falling within the scope of protection of this application with deformation.
Claims (10)
1. a kind of mutual inductor dynamic error tests system, the system comprises：
Dynamic waveform signal source, the dynamic waveform signal source include input module, signal source control module and DA moduluss of conversion
Block；The input module is used to receive the dynamic waveform parameter of preset format, and the dynamic waveform parameter is sent to signal
Source control module；The signal source control module generates dynamic waveform signal according to the dynamic waveform parameter, and is converted to DA
Module sends the dynamic waveform signal；The DA conversion modules answer analog waveform signal according to dynamic waveform signal the output phase；
The dynamic waveform parameter include fundamental frequency, fundamental voltage amplitude, fundamental phase, overtone order and the corresponding amplitude of each harmonic to
Amount and harmonic content；
Signal processing unit, the analog waveform signal that the signal processing unit is used to export dynamic waveform signal source is according to pre-
If rule is handled, the processing signal for being suitable for the input of mutual inductor primary side is obtained；The output end of the signal processing unit with
The input terminal of standard mutual inductor unit and the input terminal of to-be-tested transformer are connected；
Standard mutual inductor unit, the standard mutual inductor unit are used for according to the processing letter in the input of standard mutual inductor primary side
Number, in standard mutual inductor secondary side outputting standard signal；
Dynamic error verification unit, the dynamic error verification unit include signal conversion module, AD acquisition modules, verification control
Module and qualification module；
The signal conversion module includes standard input port and input port to be measured, the standard input port and the mark
The output end of quasi- mutual inductor is connected, and the input port to be measured is connected with to-be-tested transformer；The signal conversion module is used for will
The standard signal of input is converted to the standard small signal of preset format；The measured signal that the signal conversion module is used to input
Be converted to the small signal to be measured of preset format；
The verification control module is used to send the instruction of AD acquisition controls to AD acquisition modules according to preset rules；The verification control
Molding block is used to send verification control instruction to performance correction verification module according to preset rules；
The AD that the AD acquisition modules are used to send the standard small signal and small signal to be measured according to verification control module
Acquisition control instruction is converted to standardized digital signal and digital signal to be measured；
The verification control instruction that the qualification module is used to be sent according to verification control module is to the standardized digital signal
Error analysis, and output error data are carried out with digital signal to be measured.
2. system according to claim 1, it is characterised in that：The signal processing unit includes power amplifier and liter
Depressor；The power amplifier is for putting the analog waveform signal that dynamic waveform signal source exports according to preset gain
Greatly；The booster obtains voltage processing for the analog waveform signal after power amplification to boost according to preset rules
Signal；
The standard mutual inductor unit includes standard potential transformer, and the standard potential transformer, which is used to be handled according to voltage, to be believed
Number outputting standard voltage signal；
The standard input port of the signal conversion module includes normal voltage input port；The input port to be measured includes waiting for
Survey control source port；The standard that the signal conversion module is used to be converted to the standard voltage signal of input preset format is small
Voltage signal；The small voltage to be measured that the signal conversion module is used to be converted to the voltage signal to be measured of input preset format is believed
Number.
3. system according to claim 1, it is characterised in that：The signal processing unit includes power amplifier and liter
Flow device；The power amplifier is for putting the analog waveform signal that dynamic waveform signal source exports according to preset gain
Greatly；The current lifting device obtains current processing for flowing up the analog waveform signal after power amplification according to preset rules
Signal；
The standard mutual inductor unit includes standard current transformer, and the standard potential transformer according to current processing for believing
Number outputting standard current signal；
The standard input port of the signal conversion module includes normalized current input port；The input port to be measured includes waiting for
Survey current input terminal mouth；The standard that the signal conversion module is used to be converted to the standard current signal of input preset format is small
Current signal；The low current to be measured that the signal conversion module is used to be converted to the current signal to be measured of input preset format is believed
Number.
4. system according to claim 1, it is characterised in that：The input module includes parameter input submodule and letter
Number input submodule；
The parameter input submodule is for receiving the dynamic waveform parameter that user is keyed in by preset format, and by the dynamic wave
Shape parameter is sent to signal source control module；
The function input submodule is used to receive multigroup function formula of in chronological sequence sequence combination input by user, and will
The function formula is sent to signal source control module, and the signal source control module is moved according to the resolving of function formula
State waveform parameter.
5. system according to claim 1, it is characterised in that：The input module includes Freehandhand-drawing Waveform Input submodule；
The Freehandhand-drawing Waveform Input submodule includes touch screen sensor and capture card；The touch screen sensor receives user at it
The waveform of upper drafting, and the waveform is converted into waveform electric signal and is sent to capture card；The capture card is according to the waveform
Electric signal processing, which calculates, obtains dynamic waveform parameter, and the dynamic waveform parameter is sent to signal source control module.
6. system according to claim 1, it is characterised in that：The verification control module is according to preset including cycle
And the sampling parameter of sample rate generates the instruction of AD acquisition controls；The verification control module is according to preset including for difference
The range of transformer type, the checking parameter generation verification control instruction of no-load voltage ratio and signal path.
7. a kind of mutual inductor dynamic error test method, the method includes：
The dynamic waveform parameter for receiving preset format generates dynamic waveform signal according to the dynamic waveform parameter, and passes through DA
The dynamic waveform signal is converted to analog waveform signal by conversion；The dynamic waveform parameter includes fundamental frequency, fundamental wave width
Value, fundamental phase, overtone order and the corresponding amplitude vector of each harmonic and harmonic content；
The analog waveform signal is separately input into the input terminal of standard transducer and sensor to be measured by signal processing
Input terminal；
The standard signal of standard transducer output end output and the measured signal of sensor output to be measured output are received, by institute
After stating standard signal and measured signal progress signal processing and AD samplings, standard secretary signal and digital signal to be measured are generated；
Error analysis, and output error data are carried out to the standardized digital signal and digital signal to be measured.
8. the method according to the description of claim 7 is characterized in that when the to-be-tested transformer be voltage transformer when, it is described
Analog waveform signal progress signal processing is separately input into the input terminal of standard transducer and the input terminal of sensor to be measured
Further include：Analog waveform signal is amplified according to preset gain and boosts according to preset rules, obtains voltage processing
Signal；By the voltage processing signal be separately input into normal voltage sensor input terminal and voltage sensor to be measured it is defeated
Enter end.
9. the method according to the description of claim 7 is characterized in that when the to-be-tested transformer be current transformer when, it is described
Analog waveform signal progress signal processing is separately input into the input terminal of standard transducer and the input terminal of sensor to be measured
Further include：Analog waveform signal is amplified according to preset gain and boosts according to preset rules, obtains voltage processing
Signal；By the voltage processing signal be separately input into normal voltage sensor input terminal and voltage sensor to be measured it is defeated
Enter end.
10. the method according to the description of claim 7 is characterized in that the dynamic waveform parameter for receiving preset format is also wrapped
It includes：
It receives user and presses the dynamic waveform parameter that preset format is keyed in；
Multigroup function formula of in chronological sequence sequence combination input by user is received, and according to the resolving acquisition to function formula
Dynamic waveform parameter；
The waveform that user draws in touch screen sensor is received, the waveform is converted into waveform electric signal and handles calculating acquisition
Dynamic waveform parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810332778.0A CN108717172A (en) | 2018-04-13 | 2018-04-13 | A kind of mutual inductor dynamic error test system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810332778.0A CN108717172A (en) | 2018-04-13 | 2018-04-13 | A kind of mutual inductor dynamic error test system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108717172A true CN108717172A (en) | 2018-10-30 |
Family
ID=63899035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810332778.0A Pending CN108717172A (en) | 2018-04-13 | 2018-04-13 | A kind of mutual inductor dynamic error test system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108717172A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824408A (en) * | 2019-12-05 | 2020-02-21 | 国家电网有限公司 | Static and dynamic test system for mutual inductor in PMU |
| CN112327237A (en) * | 2020-11-17 | 2021-02-05 | 国网四川省电力公司电力科学研究院 | Error calibration system and method for broadband wide-range current transformer |
| CN113985227A (en) * | 2021-10-27 | 2022-01-28 | 云南电网有限责任公司电力科学研究院 | System and method for testing natural frequency of electromagnetic voltage transformer of distribution network |
| CN115980654A (en) * | 2023-02-03 | 2023-04-18 | 广州市德珑电子器件有限公司 | Current transformer detection method and system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201656936U (en) * | 2010-01-27 | 2010-11-24 | 赵孔新 | Function/arbitrary wave-form generator inputting arbitrary wave-form curve via touch screen |
| CN102967651A (en) * | 2012-11-19 | 2013-03-13 | 江苏科技大学 | Eddy current testing excitation signal source based on DDS (Direct Digital Synthesis) technology |
| CN103630871A (en) * | 2013-12-09 | 2014-03-12 | 国家电网公司 | Testing device for dynamic characteristics of electronic energy meter |
| CN104020331A (en) * | 2014-06-23 | 2014-09-03 | 东莞理工学院 | Oscilloscope |
| CN106054102A (en) * | 2016-08-11 | 2016-10-26 | 国网浙江省电力公司电力科学研究院 | Current-transformer harmonic wave error measurement system |
| CN106053899A (en) * | 2016-08-15 | 2016-10-26 | 北京博电新力电气股份有限公司 | Reference signal generation system and method |
| CN208443997U (en) * | 2018-04-13 | 2019-01-29 | 中国电力科学研究院有限公司 | A kind of mutual inductor dynamic error test macro |
-
2018
- 2018-04-13 CN CN201810332778.0A patent/CN108717172A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201656936U (en) * | 2010-01-27 | 2010-11-24 | 赵孔新 | Function/arbitrary wave-form generator inputting arbitrary wave-form curve via touch screen |
| CN102967651A (en) * | 2012-11-19 | 2013-03-13 | 江苏科技大学 | Eddy current testing excitation signal source based on DDS (Direct Digital Synthesis) technology |
| CN103630871A (en) * | 2013-12-09 | 2014-03-12 | 国家电网公司 | Testing device for dynamic characteristics of electronic energy meter |
| CN104020331A (en) * | 2014-06-23 | 2014-09-03 | 东莞理工学院 | Oscilloscope |
| CN106054102A (en) * | 2016-08-11 | 2016-10-26 | 国网浙江省电力公司电力科学研究院 | Current-transformer harmonic wave error measurement system |
| CN106053899A (en) * | 2016-08-15 | 2016-10-26 | 北京博电新力电气股份有限公司 | Reference signal generation system and method |
| CN208443997U (en) * | 2018-04-13 | 2019-01-29 | 中国电力科学研究院有限公司 | A kind of mutual inductor dynamic error test macro |
Non-Patent Citations (1)
| Title |
|---|
| 王晓明;周卫;: "基于RTDS仿真的电子式电流互感器暂态特性测试研究", 电工技术, no. 03, 10 March 2017 (2017-03-10), pages 17 - 19 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824408A (en) * | 2019-12-05 | 2020-02-21 | 国家电网有限公司 | Static and dynamic test system for mutual inductor in PMU |
| CN112327237A (en) * | 2020-11-17 | 2021-02-05 | 国网四川省电力公司电力科学研究院 | Error calibration system and method for broadband wide-range current transformer |
| CN113985227A (en) * | 2021-10-27 | 2022-01-28 | 云南电网有限责任公司电力科学研究院 | System and method for testing natural frequency of electromagnetic voltage transformer of distribution network |
| CN115980654A (en) * | 2023-02-03 | 2023-04-18 | 广州市德珑电子器件有限公司 | Current transformer detection method and system |
| CN115980654B (en) * | 2023-02-03 | 2023-10-31 | 广州市德珑电子器件有限公司 | Current transformer detection method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108717172A (en) | A kind of mutual inductor dynamic error test system and method | |
| Gallo et al. | A new test procedure to measure power electronic devices’ frequency coupling admittance | |
| Baylis et al. | Going nonlinear | |
| CN208443997U (en) | A kind of mutual inductor dynamic error test macro | |
| CN106777836B (en) | Transformer direct-current magnetic bias simulation method and device | |
| CN110297203A (en) | A kind of system and method for DC voltage transformer progress wideband verification | |
| Cataliotti et al. | Current transformers effects on the measurement of harmonic active power in LV and MV networks | |
| CN103207379A (en) | Method and device for measuring direct current magnetic bias error characteristics of current transformer | |
| CN114019297B (en) | High-frequency transient characteristic signal generating device of distribution line and control method thereof | |
| Ballal et al. | A novel approach for the error correction of CT in the presence of harmonic distortion | |
| CN106226723A (en) | A kind of electric energy metrical sunykatuib analysis system and method towards complex nonlinear load environment | |
| CN105205238B (en) | Transformer electromagnetic transient simulation modeling method based on PSCAD/EMTDC softwares | |
| CN103149478B (en) | Method for detecting working point of current transformer under direct current magnetic biasing condition | |
| CN102749526B (en) | A kind of method of testing of saturable reactor for direct-current converter valve dynamic inductance | |
| CN110441668A (en) | A kind of high-power IGBT test macro | |
| CN106054102A (en) | Current-transformer harmonic wave error measurement system | |
| Li et al. | Electronic transformer performance evaluation and its impact on PMU | |
| CN201757779U (en) | Electronic transformer calibrator | |
| CN109406877B (en) | Method and device for measuring harmonic transmission coefficient of capacitor voltage transformer | |
| CN107356898A (en) | A kind of harmonic signal source calibration method and power quality standard harmonic signal source | |
| CN203287514U (en) | Current transformer DC magnetic bias error characteristic measuring device | |
| CN105467347B (en) | A kind of voltage transformer exciting characteristic curve acquiring method | |
| Gallo et al. | On the Measurement of Power Electronic Devices' Frequency Coupling Admittance | |
| Xie et al. | Harmonic impedance measurement of 25 kV single phase AC supply systems | |
| Ballal et al. | Measurement current transformer error compensation by ANN methodology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |