CN106680753A - DC current transformer accuracy level test method, system and apparatus - Google Patents
DC current transformer accuracy level test method, system and apparatus Download PDFInfo
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- CN106680753A CN106680753A CN201710008453.2A CN201710008453A CN106680753A CN 106680753 A CN106680753 A CN 106680753A CN 201710008453 A CN201710008453 A CN 201710008453A CN 106680753 A CN106680753 A CN 106680753A
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- 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
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- 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
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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- 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
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The embodiment of the application discloses a DC current transformer accuracy level test method, system and apparatus. The method includes the following steps: obtaining satellite positioning information through a control host, processing the satellite positioning information, and obtaining a synchronous pulse signal; and according to the synchronous pulse signal, collecting a standard current signal or a standard voltage signal output from a standard DC current transformer, obtaining an actual current signal or an actual voltage signal output from a tested DC current transformer and obtained through collection by a wireless terminal, calculating errors between the standard current signal and the actual current signal or errors between the standard voltage signal and the actual voltage signal, and obtaining the accuracy level of the tested DC current transformer according to the errors. On the basis of a wireless communication technology, the actual current signal or the actual voltage signal output from the tested DC current transformer is sent to the control host through a wireless transmission mode. The DC current transformer accuracy level test method, system and apparatus are suitable for testing the accuracy level of the DC current transformer in a DC converter station.
Description
Technical field
The application is related to DC current transformer accuracy technical field of measurement and test, more particularly to a kind of DC current transformer
Class of accuracy method of testing, system and device.
Background technology
In order to be controlled to DC transmission system and protect, it is ensured that DC transmission system safe and stable operation, it is right to need
Measure including some amount including DC current.At present, generally by the DC current transformer in DC transmission system
To measure the electric current of DC transmission system.It is mutual to DC current in order to ensure the accuracy of DC current transformer measurement result
The accuracy of sensor carries out test becomes particularly important.
In existing DC current transformer class of accuracy method of testing, the commonly provided standard DC current transformer,
Measured DC transformer and standard DC current transformer secondary side access tester, by DC current source be by
The primary side for surveying DC current transformer and standard DC current transformer provides electric current, and measured DC transformer is secondary
The actual current signal of side, and the standard current signal input validation instrument of standard direct current Current Transformer Secondary side, by tester
The error between standard current signal and actual current signal is measured, so as to according to error analyses measured DC transformer
Class of accuracy.
In DC converter station, measured DC transformer is arranged on DC fields, it will usually by optical fiber or secondary
Loop transfer is to protection control room.In testing at the scene, standard DC current transformer is generally also disposed at DC fields, and and quilt
A side position for surveying DC current transformer is close, but, because the secondary side of measured DC transformer is in protection control
Room processed, apart from DC fields farther out, if by the two of the secondary side of measured DC transformer and standard DC current transformer
Tester is together accessed in secondary side, needs to utilize longer optical fiber, and wiring is relatively complicated, not easy to operate in testing at the scene, therefore,
Existing DC current transformer class of accuracy method of testing is not suitable for the DC current transformer in DC converter station
Class of accuracy tested.
The content of the invention
This application provides a kind of DC current transformer class of accuracy method of testing, system and device, existing to solve
Some DC current transformer class of accuracy method of testings are not suitable for the DC current transformer in DC converter station
The problem that class of accuracy is tested.
In a first aspect, this application provides DC current transformer class of accuracy method of testing, the method includes：Control
Main frame obtains satellite positioning information, and the satellite positioning information is processed, and obtains synchronization pulse；
Control main frame gathers the standard current signal of standard DC current transformer output according to the synchronization pulse
Or standard voltage signal, the actual current signal or actual voltage signal of the output of measured DC transformer are obtained, wherein, institute
State actual current signal or actual voltage signal is collected by wireless terminal, and sent to the control by wireless transmission method
Main frame processed, the wireless terminal is synchronous with the gatherer process of the control main frame；
Control main frame calculates the error between the standard current signal and the actual current signal, or the standard electric
Error between pressure signal and the actual voltage signal, according to the error, obtains the measured DC transformer
Class of accuracy.
With reference in a first aspect, in first aspect in the first possible implementation, control main frame is according to the synchronous arteries and veins
Signal is rushed, the standard voltage signal of standard DC current transformer output is gathered, including：
Control main frame gathers the master die of standard DC current transformer output under the triggering of the synchronization pulse
Analog quantity current signal or master die analog quantity voltage signal；
The master die analog quantity current signal or master die analog quantity voltage signal are carried out wavelet transformation decomposition by control main frame,
Obtain the master die analog quantity voltage signal of peak low band；
The master die analog quantity voltage signal of the peak low band is converted to standard digital amount voltage signal by control main frame；
Control main frame has carried out limit for length's unit impulse response bandpass filtering treatment to the standard digital amount voltage signal, obtains
To the standard voltage signal.
Second aspect, this application provides another kind of DC current transformer class of accuracy method of testing, the method bag
Include：
Wireless terminal obtains satellite positioning information, and the satellite positioning information is processed, and obtains synchronization pulse；
Wireless terminal gathers the actual current signal of measured DC transformer output according to the synchronization pulse
Or actual voltage signal, by wireless transmission method, the actual current signal or actual voltage signal are sent to control master
Machine so that control main frame calculates the error between standard current signal and the actual current signal, or standard voltage signal with
Error between the actual voltage signal, according to the error, obtains the accuracy of the measured DC transformer
Level, wherein, the standard current signal or standard voltage signal are collected by control main frame, the control main frame and the nothing
The gatherer process synchronization of line terminal.
With reference to second aspect, in second aspect in the first possible implementation, wireless terminal is according to the synchronous arteries and veins
Signal is rushed, the actual voltage signal of measured DC transformer output is gathered, including：
Wireless terminal gathers the actual mould of measured DC transformer output under the triggering of the synchronization pulse
Analog quantity current signal or realistic simulation amount voltage signal；
The realistic simulation amount current signal or realistic simulation amount voltage signal are carried out wavelet transformation decomposition by wireless terminal,
Obtain the realistic simulation amount voltage signal of peak low band；
The realistic simulation amount voltage signal of the peak low band is converted into real figure amount voltage signal by wireless terminal；
Wireless terminal has carried out limit for length's unit impulse response bandpass filtering treatment to the real figure amount voltage signal, obtains
To the actual voltage signal.
With reference to second aspect, in second possible implementation of second aspect, wireless terminal is according to the synchronous arteries and veins
Signal is rushed, the actual current signal of measured DC transformer output is gathered, including：
Wireless terminal gathers the actual number of measured DC transformer output under the triggering of the synchronization pulse
Word amount current signal；
Wireless terminal has carried out limit for length's unit impulse response bandpass filtering treatment to the real figure amount current signal, obtains
To the actual current signal.
The third aspect, this application provides a kind of DC current transformer class of accuracy test system, the system bag
Include：DC current source, standard DC current transformer, control main frame and wireless terminal, the DC current source respectively with it is described
Standard DC current transformer, and the primary side connection of measured DC transformer, the control main frame and the standard
The secondary side connection of DC current transformer, the wireless terminal is connected with the secondary side of the measured DC transformer；
The DC current source, for being that the standard DC current transformer and the measured DC transformer are carried
For primary current；
The standard DC current transformer, for outputting standard current signal or standard voltage signal；
The control main frame, for obtaining satellite positioning information, is processed the satellite positioning information, obtains synchronization
Pulse signal；According to the synchronization pulse, the standard current signal or standard of the output of standard DC current transformer are gathered
Voltage signal, obtains the actual current signal or actual voltage signal of the output of measured DC transformer；Calculate the standard
Between error between current signal and the actual current signal, or the standard voltage signal and the actual voltage signal
Error；According to the error, the class of accuracy of the measured DC transformer is obtained；
The wireless terminal, for obtaining satellite positioning information, is processed the satellite positioning information, obtains synchronization
Pulse signal；According to the synchronization pulse, the actual current signal or reality of the output of measured DC transformer are gathered
Voltage signal；By wireless transmission method, the actual current signal or actual voltage signal are sent to control main frame, its
In, the control main frame is synchronous with the gatherer process of the wireless terminal.
Fourth aspect, this application provides a kind of DC current transformer class of accuracy test device, for performing the
On the one hand the DC current transformer class of accuracy method of testing for providing, the device includes：
Control main frame satellite synchronization unit, for obtaining satellite positioning information, is processed the satellite positioning information,
Obtain synchronization pulse；
Standard volume collecting unit, for according to the synchronization pulse, gathering the output of standard DC current transformer
Standard current signal or standard voltage signal；
Wireless data receiving unit, for obtaining the actual current signal or actual electricity of the output of measured DC transformer
Pressure signal；
Test analysis unit, for calculating the error between the standard current signal and the actual current signal, or
Error between the standard voltage signal and the actual voltage signal, according to the error, obtains the tested unidirectional current
The class of accuracy of current transformer.
5th aspect, this application provides another kind of DC current transformer class of accuracy test device, for performing
The DC current transformer class of accuracy method of testing that second aspect is provided, the device includes：
Wireless terminal satellite synchronization unit, for obtaining satellite positioning information, is processed the satellite positioning information,
Obtain synchronization pulse；
Actual amount collecting unit, for according to the synchronization pulse, gathering the output of measured DC transformer
Actual current signal or actual voltage signal；
Wireless data transmission unit, for the actual current signal or actual voltage signal to be sent to control main frame,
So that control main frame calculates the error between standard current signal and the actual current signal, or standard voltage signal with it is described
Error between actual voltage signal, according to the error, obtains the class of accuracy of the measured DC transformer.
From above technical scheme, the embodiment of the present invention provides a kind of DC current transformer class of accuracy test side
Method, system and device, in the method, control main frame obtains satellite positioning information, and satellite positioning information is processed, and obtains same
Step pulse signal；Control main frame gathers the standard current signal of standard DC current transformer output according to synchronization pulse
Or standard voltage signal, the actual current signal or actual voltage signal of the output of measured DC transformer are obtained, wherein, it is real
Border current signal or actual voltage signal are collected by wireless terminal, and are sent to control main frame by wireless transmission method,
Wireless terminal is synchronous with the gatherer process of control main frame；Control main frame is calculated between standard current signal and actual current signal
Error between error, or standard voltage signal and actual voltage signal, according to error, obtains measured DC transformer
Class of accuracy；The application is based on wireless communication technology, by the actual current signal or reality of the output of measured DC transformer
Border voltage signal is sent to control main frame by wireless transmission method, effectively solving in DC converter station, due to tested direct current
The secondary side of current transformer in protection control room, apart from DC fields farther out, if by the secondary of measured DC transformer
The secondary side of side and standard DC current transformer together accesses tester, needs to utilize longer optical fiber, and wiring is relatively complicated,
Not easy-operating problem in testing at the scene, it is adaptable to the class of accuracy in DC converter station, to DC current transformer
Tested.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the application, letter will be made to the accompanying drawing to be used needed for embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Can be with according to these other accompanying drawings of accompanying drawings acquisition.
The schematic diagram of the DC current transformer class of accuracy test system that Fig. 1 is provided for the embodiment of the present application；
A kind of flow chart of DC current transformer class of accuracy method of testing that Fig. 2 is provided for the embodiment of the present application；
Fig. 3 gathers the normalized current letter of standard DC current transformer output for the control main frame that the embodiment of the present application is provided
Number or standard voltage signal method flow chart；
The flow process of another kind of DC current transformer class of accuracy method of testing that Fig. 4 is provided for the embodiment of the present application
Figure；
Fig. 5 gathers the actual current letter of measured DC transformer output for the wireless terminal that the embodiment of the present application is provided
Number or actual voltage signal method flow chart；
Fig. 6 gathers the actual current letter of measured DC transformer output for the wireless terminal that the embodiment of the present application is provided
The flow chart of number another kind of method；
The knot of the control main frame of the DC current transformer class of accuracy test system that Fig. 7 is provided for the embodiment of the present application
Structure block diagram；
The knot of the wireless terminal of the DC current transformer class of accuracy test system that Fig. 8 is provided for the embodiment of the present application
Structure block diagram.
Illustrate：1- DC current sources；2- standard DC current transformers；3- control main frames；4- wireless terminals；5- quilts
Survey DC current transformer；31- standard volume collecting units；32- control main frame satellite synchronization units；33- wireless datas receive single
Unit；34- test analysis units；41- actual amount collecting units；42- wireless terminal satellite synchronization units；43- wireless datas send
Unit.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Explained below is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the disclosure.Conversely, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects described in detail in claims, the disclosure.
At present, in DC converter station, because standard DC current transformer is arranged on DC fields, and with tested unidirectional current
Side position of current transformer is close, the secondary side of measured DC transformer in protection control room, apart from DC fields compared with
Far, if the secondary side of the secondary side of measured DC transformer and standard DC current transformer is together accessed into verification
Instrument, needs to utilize longer optical fiber, and wiring is relatively complicated, not easy to operate in testing at the scene, in this regard, the embodiment of the present invention is provided
A kind of DC current transformer class of accuracy method of testing, system and device, it is adaptable to the unidirectional current in DC converter station
The class of accuracy of current transformer is tested.
Fig. 1 is referred to, is a kind of DC current transformer class of accuracy test system shown in the embodiment of the present invention
Structural representation, using the DC current transformer class of accuracy test system, can be to DC converter station in, tested unidirectional current
The class of accuracy of current transformer is tested.
The DC current transformer class of accuracy test system includes：DC current source 1, standard DC current transformer
2nd, control main frame 3 and wireless terminal 4, DC current source 1 respectively with standard DC current transformer 2, and measured DC
The primary side connection of transformer 5, the machine of control main frame 3 is connected with the secondary side of standard DC current transformer 2, wireless terminal 4 and
The secondary side connection of measured DC transformer 5.
Standard DC current transformer can be the transformer of analog output type, and measured DC transformer can be
The transformer of analog output type, or the transformer of digital output type.
Wireless terminal 4 is provided with analog quantity interface and digital quantity interface, can meet the current transformer of different output types
Test.
Control main frame 3 and wireless terminal 4 are powered by 220V alternating current power supplys.
Operationally, DC current source 1 is to standard DC current transformer 2 and measured DC transformer 5 for the system
Primary current is provided.The outputting standard current signal of standard DC current transformer 2 or standard voltage signal, so as to by normalized current
The actual current signal that signal is exported with measured DC transformer 5 is contrasted, or standard voltage signal is straight with tested
The actual voltage signal of the stream output of current transformer 5 is contrasted；Control main frame 3 obtains satellite positioning information, to satellite fix
Information is processed, and obtains synchronization pulse；According to synchronization pulse, the output of standard DC current transformer 2 is gathered
Standard current signal or standard voltage signal, obtain the actual current signal or actual electricity of the output of measured DC transformer 5
Pressure signal；Calculate the error between standard current signal and actual current signal, or standard voltage signal and actual voltage signal
Between error；According to error, the class of accuracy of measured DC transformer 5 is tested.Wireless terminal 4 is used to obtain satellite
Location information, is processed satellite positioning information, obtains synchronization pulse；According to synchronization pulse, gather tested straight
The actual current signal or actual voltage signal of the stream output of current transformer 5；By wireless transmission method, by actual current signal
Or actual voltage signal is sent to control main frame 3, wherein, control main frame 3 is synchronous with the gatherer process of wireless terminal 4.
The DC current transformer class of accuracy test system that the present embodiment is provided, based on wireless communication technology, will be by
The actual current signal or actual voltage signal of DC current transformer output are surveyed by wireless transmission method, is sent to control master
Machine, in DC converter station, the secondary side due to measured DC transformer is protecting control room to effectively solving, apart from direct current
Farther out, if the secondary side of the secondary side of measured DC transformer and standard DC current transformer is together accessed into school
Instrument is tested, needs to utilize longer optical fiber, wiring is relatively complicated, not easy-operating problem in testing at the scene, it is adaptable in direct current
In current conversion station, the class of accuracy of DC current transformer is tested.
Fig. 2 is referred to, is a kind of DC current transformer class of accuracy method of testing provided in an embodiment of the present invention
Flow chart, the method includes：
Step S11, control main frame obtain satellite positioning information, and satellite positioning information is processed, and obtain lock-out pulse
Signal.Control main frame can receive big-dipper satellite location information by big-dipper satellite antenna, and through control main frame inside high accuracy
Big-dipper satellite time service board is processed, and obtains synchronization pulse, it is also possible to obtain synchronization pulse by gps satellite.
Step S12, control main frame gather the normalized current of standard DC current transformer output according to synchronization pulse
Signal or standard voltage signal, obtain the actual current signal or actual voltage signal of the output of measured DC transformer, its
In, actual current signal or actual voltage signal are collected by wireless terminal, and are sent to control by wireless transmission method
Main frame, wireless terminal is synchronous with the gatherer process of control main frame.
Fig. 3 is referred to, control main frame gathers the standard electric of standard DC current transformer output according to synchronization pulse
Pressure signal, it may include：
Step S121, control main frame gather the output of standard DC current transformer under the triggering of synchronization pulse
Master die analog quantity current signal or master die analog quantity voltage signal.
Master die analog quantity current signal or master die analog quantity voltage signal are carried out wavelet transformation by step S122, control main frame
Decompose, obtain the master die analog quantity voltage signal of peak low band.The step is believed in master die analog quantity electric current by precision resister
Number or master die analog quantity voltage signal be converted to the master die analog quantity voltage signal of peak low band.
The master die analog quantity voltage signal of peak low band is converted to standard digital amount voltage letter by step S123, control main frame
Number.The step is realized by analog-digital converter.
Step S124, control main frame have been carried out at limit for length's unit impulse response bandpass filtering to standard digital amount voltage signal
Reason, obtains standard voltage signal.
Wherein, master die analog quantity current signal or master die analog quantity voltage signal are carried out wavelet transformation point by control main frame
Solution, obtains the master die analog quantity voltage signal of peak low band, will pass through high-precision analog-digital converter by master die analog quantity electricity
Pressure signal is converted to high-precision standard digital amount voltage signal.Analog-digital converter can turning by several different sample frequencys
Parallel operation constitute, and with the being consistent property of sample rate of measured DC transformer, it is possible to achieve adopting under multiple sample frequencys
Collection.
For example, the sample frequency of measured DC transformer digital quantity is 10kHz, using little containing DC component frequency band
Wave system number asks for DC quantity, to accurately extract DC quantity, using db4 small echos by the secondary discrete letter of measured DC transformer
9 floor wavelet decomposition number are carried out, the frequency band that DC component is located is chosen, frequency range is asked for directly in the a0 wavelet coefficients of 0~20Hz
Flow component, specifically, to averaging again after the summation of all discrete signals, it is possible thereby to calculate by the straight of school transformer
Flow component A1；Because the sample frequency of measured DC transformer digital quantity is 10kHz, therefore, standard direct current Current Mutual Inductance
The A/D collection conversion frequencies of the analog quantity of device are 10kHz, and carry out Filtering Processing, using db4 small echos that standard DC current is mutual
The secondary discrete signal of sensor carries out 9 layers of wavelet decomposition, chooses the frequency band that DC component is located, a0 of the frequency range in 0~20Hz
Wavelet coefficient asks for DC component, specifically, to all discrete signals summation after carry out meansigma methodss again, it is possible thereby to calculate by
DC component A2 of DC current transformer is surveyed, the ratio error of measured DC transformer is finally calculated.
Step S13, control main frame calculate the error between standard current signal and actual current signal, or normal voltage letter
Error number and actual voltage signal between, according to error, obtains the class of accuracy of measured DC transformer.
Wherein, if the rated primary current of measured DC transformer is In, respectively to measured DC transformer
Arbitrfary point in the range of (0.1In-1.2In) is tested, or to these test points：0.1In, 0.2In, 0.5In,
0.8In, 1.0In, 1.2In are tested, if the error for measuring meets requiring, measured DC transformer is by this examination
Test.When the difference between rising and falling to measured DC transformer is tested, on the primary current of measured DC transformer
1.2In is raised to, then drops to any test point in measurement range, the error change between its rising value and drop-out value should be little
1/3 limited in its class of accuracy correspondence error.When the short-time stability to measured DC transformer is tested,
Under rated current, its error change should be not more than 1/ that its class of accuracy correspondence error is limited to measured DC transformer
3.For example, 0.2 grade of DC current transformer of on-the-spot test, difference between rising and falling and short-time stability should be not more than the 1/3 of 0.2.
The DC current transformer class of accuracy method of testing that the present embodiment is provided, using control main frame satellite is obtained
Position information, is processed satellite positioning information, obtains synchronization pulse；Control main frame is according to synchronization pulse, collection
The standard current signal or standard voltage signal of standard DC current transformer output, obtains the output of measured DC transformer
Actual current signal or actual voltage signal, wherein, actual current signal or actual voltage signal are by testing slave wirelessly eventually
End collects, and the collection that slave wireless terminal and control main frame are tested to control main frame is sent by wireless transmission method
Process synchronization；Control main frame calculates the error between standard current signal and actual current signal, or standard voltage signal and reality
Error between the voltage signal of border, according to error, obtains the class of accuracy of measured DC transformer, and the method is based on nothing
Line communication technology, the actual current signal that measured DC transformer is exported or actual voltage signal are by the side of being wirelessly transferred
Formula, sends to control main frame, and effectively solving in DC converter station, protecting by the secondary side due to measured DC transformer
Control room, apart from DC fields farther out, if by the secondary side of measured DC transformer and standard DC current transformer
Secondary side together accesses tester, needs to utilize longer optical fiber, and wiring is relatively complicated, not easy-operating in testing at the scene to ask
Topic, it is adaptable in DC converter station, the class of accuracy of DC current transformer is tested.
Fig. 4 is referred to, is another kind of DC current transformer class of accuracy method of testing provided in an embodiment of the present invention
Flow chart, method includes：
Step S21, wireless terminal obtain satellite positioning information, and satellite positioning information is processed, and obtain lock-out pulse
Signal.
Step S22, wireless terminal gather the actual current of measured DC transformer output according to synchronization pulse
Signal or actual voltage signal, by wireless transmission method, actual current signal or actual voltage signal are sent to control master
Machine, so that control main frame calculates the error between standard current signal and actual current signal, or standard voltage signal and reality
Error between voltage signal, according to error, obtains the class of accuracy of measured DC transformer, wherein, normalized current
Signal is collected by control main frame, and control main frame is synchronous with the gatherer process of wireless terminal.
Wireless terminal can make full use of field programmable gate array (English：Field-Programmable Gate
Array, abbreviation：FPGA the characteristics of) real-time, I/O mouths configuration is enriched, by controlling physical layer (English：Physical
Laye, abbreviation：PHY) chip completes the sample values (English for receiving measured DC transformer IEC61850-9 agreements：
Sample Value, abbreviation：SV), adaptive reception meets standard FT3 of IEC60044-8 or meets national grid standard
FT3 sample values, FPGA receive digital source signal when, according to the lock-out pulse from wireless terminal satellite synchronization unit,
Accurate recorded message head due in, PowerPC obtains the data that FPGA is received by dual port RAM technology, by Ethernet
Physical interface, by based on the ICP/IP protocol being reliably connected, by the sampling message with precise time label control main frame is submitted to
Test analysis unit.
Fig. 5 is referred to, if measured DC transformer is the transformer of analog output type, wireless terminal is according to same
Step pulse signal, gathers the actual current signal or actual voltage signal of the output of measured DC transformer, including：
S221, wireless terminal gather the reality of measured DC transformer output under the triggering of synchronization pulse
Analog quantity current signal or realistic simulation amount voltage signal.
Realistic simulation amount current signal or realistic simulation amount voltage signal are carried out wavelet transformation point by S222, wireless terminal
Solution, obtains the realistic simulation amount voltage signal of peak low band.
The realistic simulation amount voltage signal of peak low band is converted into real figure amount voltage signal by S223, wireless terminal.
The step is realized by analog-digital converter.
S224, wireless terminal have carried out limit for length's unit impulse response bandpass filtering treatment to real figure amount voltage signal,
Obtain actual voltage signal.
Fig. 6 is referred to, if measured DC transformer is the transformer of digital output type, wireless terminal is according to same
Step signal, gathers the actual current signal of measured DC transformer output, including：
S225, wireless terminal gather the real figure of measured DC transformer output under the triggering of synchronizing signal
Amount current signal.
S226, wireless terminal have carried out limit for length's unit impulse response bandpass filtering treatment to real figure amount current signal,
Obtain actual current signal.
The DC current transformer class of accuracy method of testing that the present embodiment is provided, wireless terminal obtains satellite fix letter
Breath, is processed satellite positioning information, obtains synchronization pulse；Wireless terminal is gathered tested according to synchronization pulse
The actual current signal or actual voltage signal of DC current transformer output, by wireless transmission method, actual current is believed
Number or actual voltage signal send to control main frame so that control main frame is calculated between standard current signal and actual current signal
Error, or the error between standard voltage signal and actual voltage signal, according to error, obtains measured DC transformer
Class of accuracy, wherein, standard current signal is collected by control main frame, the gatherer process of control main frame and wireless terminal
Synchronous, the method is based on wireless communication technology, by the actual current signal or virtual voltage of the output of measured DC transformer
Signal is sent to control main frame by wireless transmission method, effectively solving in DC converter station, due to measured DC it is mutual
The secondary side of sensor in protection control room, apart from DC fields farther out, if by the secondary side and mark of measured DC transformer
The secondary side of quasi- DC current transformer together accesses tester, needs to utilize longer optical fiber, and wiring is relatively complicated, at the scene
Not easy-operating problem in test, it is adaptable in DC converter station, the class of accuracy of DC current transformer is surveyed
Examination.
Fig. 7 is referred to, a kind of DC current transformer class of accuracy test device provided in an embodiment of the present invention is used for
Above-mentioned DC current transformer class of accuracy method of testing is performed, the device includes：
Control main frame satellite synchronization unit 31, for obtaining satellite positioning information, is processed satellite positioning information, is obtained
To synchronization pulse；
Standard volume collecting unit 32, for according to synchronization pulse, gathering the mark of standard DC current transformer output
Quasi- current signal or standard voltage signal；
Wireless data receiving unit 33, for obtaining the actual current signal or reality of the output of measured DC transformer
Voltage signal；
Test analysis unit 34, for calculating the error between standard current signal and actual current signal, or standard electric
Error between pressure signal and actual voltage signal, according to error, obtains the class of accuracy of measured DC transformer.
Fig. 8 is referred to, is another kind of DC current transformer class of accuracy test device provided in an embodiment of the present invention,
For performing above-mentioned another kind of DC current transformer class of accuracy method of testing, the device includes：
Wireless terminal satellite synchronization unit 41, for obtaining satellite positioning information, is processed satellite positioning information, is obtained
To synchronization pulse；
Actual amount collecting unit 42, for according to synchronization pulse, gathering the reality of measured DC transformer output
Border current signal or actual voltage signal；
Wireless data transmission unit 43, for actual current signal or actual voltage signal to be sent to control main frame, with
Control main frame is set to calculate the error between standard current signal and actual current signal, or standard voltage signal is believed with virtual voltage
Error between number, according to error, obtains the class of accuracy of measured DC transformer.
In implementing, the present invention also provides a kind of computer-readable storage medium, wherein, the computer-readable storage medium can be stored
There is program, each embodiment of DC current transformer class of accuracy method of testing of present invention offer is provided during the program performing
In part or all of step.Storage medium can for magnetic disc, CD, read-only memory (English：read-only
Memory, referred to as：ROM) or random access memory (English：Random access memory, referred to as：RAM) etc..
It is required that those skilled in the art can be understood that the technology in the embodiment of the present invention can add by software
General hardware platform mode realizing.Based on such understanding, the technical scheme in the embodiment of the present invention substantially or
Say that the part contributed to prior art can be embodied in the form of software product, the computer software product can be deposited
Storage in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions use (can be with so that computer equipment
Be personal computer, server, either network equipment etc.) perform some parts of each embodiment of the invention or embodiment
Method.
In this specification between each embodiment identical similar part mutually referring to.Carry especially for the present invention
For DC current transformer class of accuracy test device embodiment for, because it is substantially similar to embodiment of the method, institute
Fairly simple with what is described, related part is referring to the explanation in embodiment of the method.
Embodiment of the present invention above does not constitute limiting the scope of the present invention.
Claims (8)
1. a kind of DC current transformer class of accuracy method of testing, it is characterised in that methods described includes：
Control main frame obtains satellite positioning information, and the satellite positioning information is processed, and obtains synchronization pulse；
Control main frame gathers the standard current signal or mark of the output of standard DC current transformer according to the synchronization pulse
Quasi- voltage signal, obtains the actual current signal or actual voltage signal of the output of measured DC transformer, wherein, the reality
Border current signal or actual voltage signal are collected by wireless terminal, and are sent to the control master by wireless transmission method
Machine, the wireless terminal is synchronous with the gatherer process of the control main frame；
Control main frame calculates the error between the standard current signal and the actual current signal, or normal voltage letter
Number with the error between the actual voltage signal, according to the error, obtain the accurate of the measured DC transformer
Degree grade.
2. the method for claim 1, it is characterised in that control main frame gathers standard according to the synchronization pulse
The standard voltage signal of DC current transformer output, including：
Control main frame gathers the master die analog quantity of standard DC current transformer output under the triggering of the synchronization pulse
Current signal or master die analog quantity voltage signal；
The master die analog quantity current signal or master die analog quantity voltage signal are carried out wavelet transformation decomposition by control main frame, are obtained
The master die analog quantity voltage signal of peak low band；
The master die analog quantity voltage signal of the peak low band is converted to standard digital amount voltage signal by control main frame；
Control main frame has carried out limit for length's unit impulse response bandpass filtering treatment to the standard digital amount voltage signal, obtains institute
State standard voltage signal.
3. a kind of DC current transformer class of accuracy method of testing, it is characterised in that methods described includes：
Wireless terminal obtains satellite positioning information, and the satellite positioning information is processed, and obtains synchronization pulse；
Wireless terminal gathers the actual current signal or reality of the output of measured DC transformer according to the synchronization pulse
Border voltage signal, by wireless transmission method, the actual current signal or actual voltage signal is sent to control main frame, with
Control main frame is set to calculate the error between standard current signal and the actual current signal, or standard voltage signal and the reality
Error between the voltage signal of border, according to the error, obtains the class of accuracy of the measured DC transformer, its
In, the standard current signal or standard voltage signal are collected by control main frame, the control main frame and the wireless end
The gatherer process synchronization at end.
4. method as claimed in claim 3, it is characterised in that wireless terminal is gathered tested according to the synchronization pulse
The actual voltage signal of DC current transformer output, including：
Wireless terminal gathers the realistic simulation amount of measured DC transformer output under the triggering of the synchronization pulse
Current signal or realistic simulation amount voltage signal；
The realistic simulation amount current signal or realistic simulation amount voltage signal are carried out wavelet transformation decomposition by wireless terminal, are obtained
The realistic simulation amount voltage signal of peak low band；
The realistic simulation amount voltage signal of the peak low band is converted into real figure amount voltage signal by wireless terminal；
Wireless terminal has carried out limit for length's unit impulse response bandpass filtering treatment to the real figure amount voltage signal, obtains institute
State actual voltage signal.
5. method as claimed in claim 3, it is characterised in that wireless terminal is gathered tested according to the synchronization pulse
The actual current signal of DC current transformer output, including：
Wireless terminal gathers the real figure amount of measured DC transformer output under the triggering of the synchronization pulse
Current signal；
Wireless terminal has carried out limit for length's unit impulse response bandpass filtering treatment to the real figure amount current signal, obtains institute
State actual current signal.
6. a kind of DC current transformer class of accuracy test system, it is characterised in that include：DC current source, standard straight
Stream current transformer, control main frame and wireless terminal, the DC current source respectively with the standard DC current transformer, with
And the primary side connection of measured DC transformer, the secondary side of the control main frame and the standard DC current transformer
Connection, the wireless terminal is connected with the secondary side of the measured DC transformer；
The DC current source, for being that the standard DC current transformer and the measured DC transformer provide one
Primary current；
The standard DC current transformer, for outputting standard current signal or standard voltage signal；
The control main frame, for obtaining satellite positioning information, is processed the satellite positioning information, obtains lock-out pulse
Signal；According to the synchronization pulse, the standard current signal or normal voltage of the output of standard DC current transformer are gathered
Signal, obtains the actual current signal or actual voltage signal of the output of measured DC transformer；Calculate the normalized current
Mistake between error between signal and the actual current signal, or the standard voltage signal and the actual voltage signal
Difference；According to the error, the class of accuracy of the measured DC transformer is obtained；
The wireless terminal, for obtaining satellite positioning information, is processed the satellite positioning information, obtains lock-out pulse
Signal；According to the synchronization pulse, the actual current signal or virtual voltage of the output of measured DC transformer are gathered
Signal；By wireless transmission method, the actual current signal or actual voltage signal are sent to control main frame, wherein, institute
State control main frame synchronous with the gatherer process of the wireless terminal.
7. a kind of DC current transformer class of accuracy test device, it is characterised in that include：
Control main frame satellite synchronization unit, for obtaining satellite positioning information, is processed the satellite positioning information, is obtained
Synchronization pulse；
Standard volume collecting unit, for according to the synchronization pulse, gathering the standard of standard DC current transformer output
Current signal or standard voltage signal；
Wireless data receiving unit, for obtaining the actual current signal or virtual voltage letter of the output of measured DC transformer
Number；
Test analysis unit is for calculating the error between the standard current signal and the actual current signal or described
Error between standard voltage signal and the actual voltage signal, according to the error, obtains the measured DC mutual
The class of accuracy of sensor.
8. a kind of DC current transformer class of accuracy test device, it is characterised in that include：
Wireless terminal satellite synchronization unit, for obtaining satellite positioning information, is processed the satellite positioning information, is obtained
Synchronization pulse；
Actual amount collecting unit, for according to the synchronization pulse, gathering the reality of measured DC transformer output
Current signal or actual voltage signal；
Wireless data transmission unit, for the actual current signal or actual voltage signal to be sent to control main frame, so that
Control main frame calculates the error between standard current signal and the actual current signal, or standard voltage signal and the reality
Error between voltage signal, according to the error, obtains the class of accuracy of the measured DC transformer.
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Application publication date: 20170517 |