CN105891602B - A kind of earthing or grounding means GPS shunting phase shift test method and system - Google Patents
A kind of earthing or grounding means GPS shunting phase shift test method and system Download PDFInfo
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- CN105891602B CN105891602B CN201610185623.XA CN201610185623A CN105891602B CN 105891602 B CN105891602 B CN 105891602B CN 201610185623 A CN201610185623 A CN 201610185623A CN 105891602 B CN105891602 B CN 105891602B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
- G01R25/04—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents involving adjustment of a phase shifter to produce a predetermined phase difference, e.g. zero difference
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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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Abstract
The present invention discloses a kind of earthing or grounding means GPS shuntings phase shift test method, its PPS pulse per second (PPS) synchronizing signal provided by GPS artificial earths satellite, injection non-power-frequency current signal, the alien frequencies voltage drop of generation and each disengaging line architecture shunting and the phase difference at GPS second pulse signal rising edge are calculated first, then reference data is reduced to alien frequencies voltage, is finally grounded the accurate measurement of device shunting phase shift.The invention also discloses a kind of earthing or grounding means GPS shunting phase shifts to test system.The present invention is not necessarily to additional reference data voltage lead, is not also limited and barrier by field test environmental condition, has many advantages, such as that anti-electromagnetic interference capability is strong, transmission range is wide, no signal postpones, workload is small, on-the-spot test is easy to use.
Description
Technical field
The invention belongs to earthing or grounding means state-detection evaluation areas, and in particular to a kind of earthing or grounding means GPS shuntings phase shift survey
Method for testing.
Background technology
There are various disengaging line architectures, the shunting function of these disengaging line architectures to lead to live survey in power plant, substation
The impedance ground value of earthing or grounding means can not be accurately obtained when examination.Tradition is main for the measurement method of earthing or grounding means shunting both at home and abroad
To determine diverting coefficient in such a way that field measurement shunts size, i.e., measured respectively by clamp on amperemeter aerial earth wire and
The shunting modulus value of the various outlets such as cable jacket, and carry out simple algebraic addition and subtract, then with test Injection Current modulus value phase
Compare, to determine the size of diverting coefficient.This kind of mode has ignored the influence of shunting phase shift, and shunting is carried out letter as scalar
Single read group total.Due to passing in and out the presence of line architecture inductive component, the shunting of each inlet-outlet line shows that there are one with Injection Current
Fixed phase angle difference, it is not always identical or on the contrary, therefore cannot directly carry out simply add and subtract calculate.
Patent CN103197133 discloses a kind of earth mat shunting vector quantity measurement method based on wireless transmission, that is, works as signal
While non-power-frequency current is injected in source to earthing or grounding means, the phase data of real-time sampling Injection Current waveform, and pass through wireless transmission
Device launches Injection Current phase data, then is received by radio receiver and sent to apolegamy multimeter and carry out analysis
Reason.It is special since wireless communication technique is easily influenced by on-the-spot test environment although this kind of mode can measure shunting phase shift
It is not even more to limit the effective distance of its transmission in the case where encountering site obstructions.In addition, this kind of mode generally also needs
The corresponding wireless transmitting unit of optional equipment and special frequency-selecting communication apparatus are wanted, can also influence live survey to a certain extent
The workload of examination personnel.
In view of this, the present inventor is for existing for existing earthing or grounding means shunting phase shift test method in current industry field
Disadvantage is furtherd investigate, and has this case generation then.
Invention content
The purpose of the present invention is to provide a kind of earthing or grounding means GPS shunting phase shift test methods and systems, can not tear open
In the case of solving various disengaging line architectures, the accurate shunting phase shift for obtaining earthing or grounding means is grounded device shunting phase shift and calculates,
Consequently facilitating the amendment of earth loop impedance test value.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of earthing or grounding means GPS shunts phase shift test method, which is characterized in that includes variable frequency signal source and adjustable based on one
System is tested in the earthing or grounding means GPS shunting phase shifts of frequency multimeter, is included the following steps：
Step S1, earthing or grounding means GPS shunting phase shift test system to the measuring loop arranged in advance sustainedly and stably
Inject a non-power-frequency current signal；
Step S2, earthing or grounding means GPS shunt the GPS on variable frequency signal source and adjustable frequency multimeter in phase shift test system
Module keeps synchronizing by receiving the PPS pps pulse per second signal moment that GPS artificial earths satellite provide；
Step S3, acquire and calculate injection non-power-frequency current signal and generation alien frequencies voltage drop respectively with respectively
The phase difference at PPS pps pulse per second signal rising edges in GPS module using the alien frequencies voltage as referring to benchmark, even, then
The phase of injected non-power-frequency current signal is；
Step S4 utilizes flexible current coil and the same pacing of GPS second pulse signal while non-power-frequency current signal injects
Measure shunting signal and the phase difference at PPS pps pulse per second signal rising edges in GPS module on certain disengaging line architecture；
Step S5, if complete in all disengaging line architecture shunting signals and GPS module at PPS pps pulse per second signal rising edges
Phase difference measurement, if so, enter step S6, if it is not, then return to step S4 carries out duplicate measurements, to obtain each disengaging
Line framework shunts phase difference；
Step S6, still using alien frequencies voltage as benchmark is referred to, calculates the shunting phase of each disengaging line architecture with step S3
It moves, respectively.
A kind of earthing or grounding means GPS shuntings phase shift test device, it is characterised in that：Including variable frequency signal source, coupling transformer
And adjustable frequency multimeter；Wherein, the variable frequency signal source, which includes at least, non-power-frequency current signal generating module and the first GPS
Module；The input terminal of the coupling transformer is connected with variable frequency signal source, and the two is used cooperatively, and is reserved with the output of alien frequencies signal
Terminal；The adjustable frequency multimeter, which includes at least, current acquisition module, voltage acquisition module and the second GPS module, institute
The input terminal for stating current acquisition module coupling transformer is connected with variable frequency signal source, and the input terminal of the coupling transformer is provided with
Flexible current coil for being connected with current acquisition module, when test include the following steps,
Step S1, earthing or grounding means GPS shunting phase shift test system to the measuring loop arranged in advance sustainedly and stably
Inject a non-power-frequency current signal；
Step S2, earthing or grounding means GPS shunt the GPS on variable frequency signal source and adjustable frequency multimeter in phase shift test system
Module keeps synchronizing by receiving the PPS pps pulse per second signal moment that GPS artificial earths satellite provide；
Step S3, acquire and calculate injection non-power-frequency current signal and generation alien frequencies voltage drop respectively with respectively
The phase difference at PPS pps pulse per second signal rising edges in GPS module, using the alien frequencies voltage as refer to benchmark, even, then
The phase of injected non-power-frequency current signal is；
Step S4 utilizes flexible current coil and the same pacing of GPS second pulse signal while non-power-frequency current signal injects
Measure shunting signal and the phase difference at PPS pps pulse per second signal rising edges in GPS module on certain disengaging line architecture；
Step S5, if complete in all disengaging line architecture shunting signals and GPS module at PPS pps pulse per second signal rising edges
Phase difference measurement, if so, enter step S6, if it is not, then return to step S4 carries out duplicate measurements, to obtain each disengaging
Line framework shunts phase difference；
Step S6, still using alien frequencies voltage as benchmark is referred to, calculates the shunting phase of each disengaging line architecture with step S3
It moves, respectively.
Further, the variable frequency signal source, including it is first microprocessor module, power module, emergency braking module, different
Frequency current signal generation module, current stabilization module, the first isolation filter module, the first A/D modules, LCD is shown and state instruction mould
Block, fault alarm module, the first keyboard input module and the first GPS module；The coupling transformer, including the choosing of impedance gear
Open up pass, multistage tap winding module, stimulus output module, signal detection module；The adjustable frequency multimeter, including
Current acquisition module, voltage acquisition module, the second isolation filter module, the 2nd A/D modules, the second microprocessor module, second
It is keyboard input module, LCD display module, the second GPS module, memory module, USB transmission module, charging interface module, chargeable
Battery；One output end of first microprocessor module in the variable frequency signal source is connected with an input terminal of power module,
The output end of the power module described first and emergency braking module collective effect after non-power-frequency current signal generating module with current stabilization
Module is connected, then defeated with impedance gear gating switch, multistage tap winding module, the stimulus in coupling transformer successively
Go out module to be connected, at the same time, signal detection module in the coupling transformer also respectively with multistage tap winding module
The output end of input terminal and stimulus output module be connected, later again successively with the first isolation filter in variable frequency signal source
Module, the first A/D modules, first microprocessor module are connected, and the matching of variable frequency signal source and coupling transformer uses, to real
The continual and steady output of existing non-power-frequency current signal；Current acquisition module in the adjustable frequency multimeter and voltage acquisition module
Output end successively with the second isolation filter module, the 2nd A/D modules, the second microprocessor module and LCD display module phase
Even；Two input terminals of second microprocessor module and the second GPS module, the output end phase of the second keyboard input module
Even, it is respectively used to be grounded net shunting phase shift synchro measure and operational order input；And two groups of input/output terminals are simultaneously
Also it is connected with memory module and USB transmission module, is respectively used to carry out test record storage and export；The charging interface module
It is connected with rechargeable battery, be respectively used to be charged and stored electric energy and is powered for modules.
Further, the coupling transformer further includes winding temperature detection module, and the multistage tap winding module is also
It is connected with the winding temperature detection module, the multistage tap winding module includes a plurality of windings, the winding temperature inspection
It includes being built at least one self-resetting temperature heat sensor of each winding to survey module, and the temperature heat sensor is used for
Show the real time temperature on winding primary side and secondary side in coupling transformer, and can be automatic in the case where load is excessive or apparatus overheat
It cuts off the power and protects coupling transformer.
Further, it is carried out when the every 10th PPS pulse per second (PPS) of first GPS module and GPS artificial earths satellite primary
It is synchronous.
Further, frequency measurement ranging from 40Hz ~ 69Hz of the adjustable frequency multimeter, stepping amplitude are 0.1Hz
It can be set with 1Hz user, when frequency stepping amplitude is 0.1Hz, the second GPS module on the adjustable frequency multimeter and GPS
It is subsynchronous that one is carried out when every 10th PPS pulse per second (PPS) of artificial earth satellite；It is described adjustable when frequency stepping amplitude is 1Hz
It is subsynchronous that one is carried out when the second GPS module on frequency multimeter and every 1st PPS pulse per second (PPS) of GPS artificial earths satellite.
Further, the variable frequency signal source and/or the adjustable frequency multimeter can simultaneous display GPS states, positioning
Pattern, live longitude and latitude, UTC Coordinated Universal Time(UTC)s, current sync number of satellite information.
Further, the current acquisition module of the adjustable frequency multimeter is sampled configured with double-flexibility current coil simultaneously
Interface is respectively used to external Rogowski coil or ACP3000 coils, wherein the current measuring range of Rogowski coil is 0
The current range of ~ 200A, ACP3000 coil is 0 ~ 3000A, and the adjustable frequency multimeter further includes input impedance gear switch
Module, the voltage acquisition module are used also with the input impedance gear switch module collective effect in the second isolation filter module
In switching different input impedance gear, with the measurement and simulation human body resistance of realizing open-circuit voltage carry out contact voltage, across
The measurement of voltage is walked, further includes checking that the BNC of non-power-frequency current waveform is defeated for external oscillograph in the adjustable frequency multimeter
Go out module, second microprocessor module is also connected with BNC output modules.
Further, first in the input terminal and variable frequency signal source of the impedance gear gating switch in the coupling transformer
The output end of microprocessor module is connected, and further includes working status indication module, the stimulus in the coupling transformer
Output module is connected with working status indication module, and the coupling transformer further includes reference voltage output module, the experiment
Signal output module is also connected with reference voltage output module, at least one set of impedance shelves built in the reference voltage output module
Position.
Further, first GPS module and/or the second GPS module are that a GPS synchronizes reception device, which synchronizes
Reception device includes that GPS synchronizes reception device ontology, interface module and for synchronizing reception device ontology normal work for GPS
The power module of electric energy is provided, it includes being sequentially connected the GPS antenna connect, preamplifier that the GPS, which synchronizes reception device ontology,
Module, frequency-variable module, receiving module, processing module and transmission module, the input terminal of the power module and interface module
Output end is connected all the way, and the output end of the transmission module is connected with the input terminal of the interface module.
Compared to the prior art, the advantageous effect that the present invention generates is:
A kind of earthing or grounding means GPS of the present invention shunts phase shift test method, is not necessarily to additional reference data voltage lead,
Also do not limited by field test environmental condition, have anti-electromagnetic interference capability is strong, transmission range is wide, no signal delay, work
It measures the features such as small, on-the-spot test uses simpler convenience.
Description of the drawings
Fig. 1 is that a kind of earthing or grounding means GPS of the present invention shunts the structural schematic diagram that system is tested in phase shift.
Fig. 2 is that a kind of earthing or grounding means GPS of the present invention shunts the on-the-spot test wiring schematic diagram that system is tested in phase shift.
Fig. 3 is that a kind of earthing or grounding means GPS of the present invention shunts the Field triage instrumentation plan that system is tested in phase shift.
Fig. 4 is that a kind of earthing or grounding means GPS of the present invention shunts the first GPS module and second in phase shift test system
The structural schematic diagram of GPS module.
Specific implementation mode
Illustrate the specific implementation mode of the present invention with reference to the accompanying drawings.
As shown in Figure 1, a kind of earthing or grounding means GPS shunts phase shift test method, it is single comprising the output of alien frequencies signal based on one
The earthing or grounding means test parameter measuring system of member and adjustable frequency multimeter, specifically comprises the following steps：
Step S1, earthing or grounding means characterisitic parameter measuring system are sustainedly and stably injected to the measuring loop arranged in advance
One non-power-frequency current signal；
Step S2, in earthing or grounding means characterisitic parameter measuring system on alien frequencies signal output unit and adjustable frequency multimeter
GPS module keeps synchronizing by receiving the PPS pps pulse per second signal moment that GPS artificial earths satellite provide；
Step S3, acquire and calculate injection non-power-frequency current signal and generation alien frequencies voltage drop respectively with respectively
The phase difference at PPS pps pulse per second signal rising edges in GPS module using the alien frequencies voltage as referring to benchmark, even, then
The phase of injected non-power-frequency current signal is；
Step S4 utilizes flexible current coil and the same pacing of GPS second pulse signal while non-power-frequency current signal injects
Measure shunting signal and the phase difference at PPS pps pulse per second signal rising edges in GPS module on certain disengaging line architecture；
Step S5, if complete in all disengaging line architecture shunting signals and GPS module at PPS pps pulse per second signal rising edges
Phase difference measurement.If so, S6 is entered step, if it is not, then return to step S4 carries out duplicate measurements, to obtain each disengaging
Line framework shunts phase difference；
Step S6, still using alien frequencies voltage as benchmark is referred to, calculates the shunting phase of each disengaging line architecture with step S3
It moves, respectively.
A kind of earthing or grounding means GPS of the present invention shunts phase shift test method, is not necessarily to additional reference data voltage lead,
Also do not limited by field test environmental condition, have anti-electromagnetic interference capability is strong, transmission range is wide, no signal delay, work
It measures the features such as small, on-the-spot test uses simpler convenience.
As shown in Fig. 2, being that the present invention relates to the preferable realities that system is tested in a kind of earthing or grounding means GPS shunting phase shifts shown in it
Example is applied, earthing or grounding means GPS shunting phase shift test systems include variable frequency signal source I, coupling transformer II and adjustable frequency ten thousand
With three parts of Table III.
The variable frequency signal source I has first microprocessor module 1, power module 2, emergency braking module 3, alien frequencies
Current signal generation module 4, current stabilization module 5, the first isolation filter module 10, the first A/D modules 11, LCD is shown and state refers to
Show module 12, fault alarm module 13, the first keyboard input module 14 and the first GPS module 15.
The coupling transformer II has impedance gear gating switch 6, multistage tap winding module 7, stimulus defeated
Go out module 8, signal detection module 9, winding temperature detection module 16, working status indication module 17, reference voltage output module
18。
The adjustable frequency multimeter III has current acquisition module 19, voltage acquisition module 20, input impedance shelves
Position handover module 21, the second isolation filter module 22, the 2nd A/D modules 23, the second microprocessor module 24, the input of the second keyboard
Module 25, the second GPS module 27, memory module 28, USB transmission module 29, BNC output modules 30, is filled at LCD display module 26
Electrical interface module 31, rechargeable battery 32.
One output end of the first microprocessor module 1 in the variable frequency signal source I and one of power module 2 it is defeated
It is unidirectional connected to enter end, the output end of the power module 2 occurs with 3 collective effect of emergency braking module in non-power-frequency current signal first
Unidirectionally it is connected with current stabilization module 5 after module 4, is then taken out successively with the impedance gear gating switch 6 in coupling transformer II, multistage
Head winding module 7, stimulus output module 8 are unidirectionally connected；The emergency braking module 3 is configured with EMERGENCY emergency brakings
Switch, encounter failure can emergency braking, cut off the power, the effective protection person and public property safety；The first microprocessor
Module 1 is also shown with LCD and state indicator module 12, fault alarm module 13, the first keyboard input module 14 and the first GPS
Module 15 is unidirectionally connected, and is respectively used to the non-power-frequency current signal and equipment running status information, fault alarm acousto-optic of display output
Signal output, operational order input and the PPS pulse per second (PPS) synchronizing signals for receiving GPS artificial earths satellite, first GPS module
15 can pass in and out line architecture shunting phase shift test for earthing or grounding means provides identical reference time scale.At the same time, the coupling transformer
Signal detection module 9 in II is also defeated with the input terminal of multistage tap winding module 7 and stimulus output module 8 respectively
Outlet is unidirectionally connected, later again successively with the first isolation filter module 10, the first A/D modules 11, first in variable frequency signal source I
Microprocessor module 1 is unidirectionally connected, and the impedance gear gating switch 6 is unidirectional with first microprocessor module 1 in variable frequency signal source I
It is connected, and by the effect of the first microprocessor module 1, which has 8 grades of impedance matching gears, energy
The impedance loop for matching 0~2000 Ω, is suitable for the test request of different soils condition.By variable frequency signal source I with
The matching of coupling transformer II uses the continual and steady output, it can be achieved that non-power-frequency current signal.
Furthermore it is preferred that multistage tap winding module 7 in coupling transformer II also with winding temperature detection module 16
It is unidirectional to be connected, by that in self-resetting temperature heat sensor built in tap winding, can show coupling transformer winding primary side
And the real time temperature on secondary side, and can automatically cut off the power protection coupling transformer in the case where load is excessive or apparatus overheat；
The stimulus output module 8 is also unidirectionally connected with working status indication module 17 and reference voltage output module 18, the work
State indicator module 17 uses red LED indicator light, when exporting non-power-frequency current signal, red LED status lamp flicker, convenient for using
Family understands equipment working state in real time；Two group of 10 Ω impedance gear built in the reference voltage output module 18 can be used as benchmark ginseng
Voltage terminal is examined, test lead is directly connected to and carries out earthing or grounding means disengaging line architecture shunting phase shift test.
The output end of current acquisition module 19 and voltage acquisition module 20 in the adjustable frequency multimeter III is successively
With the second isolation filter module 22,26 unidirectional phase of the 2nd A/D modules 23, the second microprocessor module 24 and LCD display module
Even；The current acquisition module 19 simultaneously be configured with double-flexibility current coil Sampling Interface, can distinguish external Rogowski or
The two distinct types of coils of ACP3000.Wherein, the current measuring range of Rogowski coil is 0 ~ 200A, ACP3000 coils
Current range be 0 ~ 3000A；The voltage acquisition module 20 is also with 21 collective effect of input impedance gear switch module in second
Isolation filter module 22, for switching different input impedance gears, to realize measurement and the simulation human body electricity of open-circuit voltage
Resistance carries out the measurement of contact voltage, step voltage；Two input terminals of second microprocessor module 24 and the second GPS module
27, the output end of the second keyboard input module 25 is unidirectionally connected, be respectively used to be grounded net shunting phase shift synchro measure and
Operational order inputs, and its two groups of input/output terminals divide simultaneously also with memory module 28 and USB transmission module 29 is two-way is connected
Test record storage and data export Yong Yu not be carried out, is unidirectionally connected with BNC output modules 30 there are one output end, for outer
It connects oscillograph and checks non-power-frequency current waveform；The charging interface module 31 is connected with rechargeable battery 32, is respectively used to charge
And it stores electric energy and is powered for modules.
Furthermore it is preferred that the first GPS module 15 on variable frequency signal source I and the on adjustable frequency multimeter III
Two GPS modules 27 can be synchronized by the PPS pps pulse per second signals that GPS artificial earths satellite provide, to be earthing or grounding means
It shunts phase shift test and reference data is provided.
In this way, system is tested in a kind of earthing or grounding means GPS shunting phase shift of the present invention, the on variable frequency signal source I
One keyboard input module 14 sends out test instruction to first microprocessor after setting the parameters such as target frequency, electric current, gear
Module 1, first microprocessor module 1 act on power module 2 after receiving test instruction, and power module 2 drives different later
The non-power-frequency current signal that module 4 acts and generates default required frequency occurs for frequency current signal, carries out stablizing tune through current stabilization module 5
Be sent into after reason coupling transformer II middle impedance gears gating switch 6, multistage tap winding module 7, stimulus output module 8 into
Row output.At the same time, the signal detection module 9 on coupling transformer II acquires multistage 7 input terminal of tap winding module respectively
And the current signal of 8 output end of stimulus output module, and carry out signal isolation and filter through the first isolation filter module 10
It is sent into first microprocessor module 1 after wave processing and the first A/D modules 11 progress analog-to-digital conversion and carries out analysis calculating, then led to
It crosses LCD to show and the result informations such as 12 show circuit impedance value of state indicator module, finally according to the loop resistance values hand of display
Suitable impedance matching gear in the dynamic multistage tap winding module 7 of selection, first microprocessor module 1 are set receiving
Corresponding enabled instruction is sent out after gear information, is enabled impedance gear gating switch 6 gate matched winding gear, is changed device
Impedance values are allowed to suitable with loop resistance values matching, thus under impedance loop and output impedance optimal coupling condition, it is real
The optimization of existing non-power-frequency current signal and continual and steady output, be finally injected into have been laid out by earthing pole G and electric current pole C
In the current loop of composition.
It is adjustable while variable frequency signal source I and coupling transformer II are generated in non-power-frequency current signal injection earthing or grounding means G
Current acquisition module 19 in frequency multimeter III acquires the alien frequencies being injected into earthing or grounding means characterisitic parameter measurement current loop
The shunting signal of current signal or each outlet framework, voltage acquisition module 20 acquire after selected input impedance by earthing pole
The voltage difference between alien frequencies voltage drop or simulation human metalloproteinase plate in the voltage circuit that G and voltage pole P are constituted, the non-power-frequency current
Signal and alien frequencies fall voltage signal are filtered by the second isolation filter module 22 respectively to carry out with the 2nd A/D modules 23
After analog-to-digital conversion, it is sent into the second microprocessor module 24 and carries out analysis calculating, finally by the non-power-frequency current measured, voltage, phase
The parameters such as position information and the impedance ground value that is calculated pass through LCD display module 26 and carry out real-time display or be sent into storage mould
Block 28 carries out record storage.
The present invention provides a kind of earthing or grounding means GPS shunting phase shifts to test system, has stable output signal, frequency-selecting performance
It is excellent, measurement reproducibility is good, stable testing degree height, perfect in shape and function, test event are complete and equipment volume is small, uses simple, behaviour
Make convenient, safe feature, convenient for the development of live earthing or grounding means characterisitic parameter comprehensive detection work.
Specifically, when on-the-spot test, as shown in figure 3, variable frequency signal source I uses 220V or 380V AC power supply, pass through
Non-power-frequency current signal generating module 4 generates the non-power-frequency current signal of a certain frequency in 40Hz ~ 70Hz, and current stabilization is carried out through current stabilization module
Impedance gear gating switch 6, multistage tap winding module 7, the stimulus being sequentially sent to after conditioning in coupling transformer II are defeated
Go out module 8, later according to manually selecting one after 9 collected impedance loop information of signal detection module in coupling transformer II
Most suitable impedance matching gear, and promote impedance gear gating switch 6 in the case where first microprocessor module 1 exports order effect
Corresponding action is carried out with multistage tap winding module 7 to switch, to complete the transformation of output impedance and the matching of impedance loop,
To make stimulus output module 8 generate one and test loop Optimum Matching and the maximized non-power-frequency current letter of output power
Number, it is injected into the earthing or grounding means current measurement circuit GC arranged, and realize the continual and steady output of the non-power-frequency current signal.
And adjustable frequency multimeter III is powered using rechargeable battery 32, passes through current acquisition module 19, voltage acquisition module 20
The fall voltage signal for flowing through the current signal on tested current loop GC and being generated on voltage circuit GP is acquired respectively, later
Being filtered through the second isolation filter module 22 and the analog-to-digital conversion process of the 2nd A/D modules, the number that will be converted to
Signal be sent into the second microprocessor module 24 handled, operation, obtain the impedance ground value of earthing or grounding means, step voltage, connect
Get an electric shock the characterisitic parameters such as pressure, and is shown to test result by LCD display module 26, storage unit 28, USB transmission module 29
Show, store and download export.
When carrying out earthing or grounding means shunting phase-shift measurement, as shown in figure 4, matching in variable frequency signal source I and coupling transformer II
It closes using and while injection non-power-frequency current signal, opens adjustable frequency general-purpose into the earthing or grounding means current loop GC arranged
GPS synchronizing functions switch in Table III makes on the first GPS module 15 and adjustable frequency multimeter III on variable frequency signal source I
The PPS pulse per second (PPS)s that are provided by GPS artificial earths satellite of the second GPS module 27 synchronize.At this point, adjustable frequency multimeter
III is directly wound in the various disengaging on tested earthing or grounding means by the mating respective flexible current coil of current acquisition module 19
On line framework, specific work process may include steps of：
Specifically comprise the following steps：
The first step, acquire and calculate injection non-power-frequency current signal and generation alien frequencies voltage drop respectively with respectively
The phase difference at PPS pps pulse per second signal rising edges in GPS module using the alien frequencies voltage as referring to benchmark, even, then
The phase of injected non-power-frequency current signal is；
Second step utilizes flexible current coil and the same pacing of GPS second pulse signal while non-power-frequency current signal injects
Measure shunting signal and the phase difference at PPS pps pulse per second signal rising edges in GPS module on certain disengaging line architecture；
Third walks, if completes in all disengaging line architecture shunting signals and GPS module at PPS pps pulse per second signal rising edges
Phase difference measurement.If so, entering step in next step, if it is not, then return to step second step carries out duplicate measurements, to obtain
Each inlet-outlet line framework shunts phase difference；
4th step, the same first step calculate the shunting phase of each disengaging line architecture still using alien frequencies voltage as benchmark is referred to
It moves, respectively.
By following processing step, collected shunting phase shift signalling is through the second isolation filter module 22, the 2nd A/D modules
23 and second microprocessor module 24 handle after, the size and phase value of shunting can be directly displayed in LCD display module 26,
Corresponding test data is intuitively read convenient for user.By above-mentioned setting, the present invention can bring following advantageous effect：
First, carrying GPS synchronized splitters measures function, with anti-electromagnetic interference capability, strong, signal receives stable, transmission distance
From wide feature, facilitate the measurement of the various disengaging line architecture shunting phase shifts of live earthing or grounding means；
Second is that with stable output signal, frequency-selecting is had excellent performance, measurement reproducibility is good, stable testing degree height, perfect in shape and function,
Complete, the safe feature of test event can be grounded the Comprehensive detection of device items characterisitic parameter；
Third, equipment volume it is small, using being simple and convenient to operate, be used in conjunction with each other, can effectively mitigate without multiple instrument
The amount of labour of Field Force improves scene detection efficiency.
In a preferred embodiment of the invention, following knot may be used in first GPS module and/or the second GPS module
One GPS of structure synchronizes reception device.
The GPS synchronizes reception device：GPS synchronizes reception device ontology 411, interface module 49 and power module
410.It includes GPS antenna 41, pre-amplifier module 42, frequency-variable module 43, receiving module that GPS, which synchronizes reception device ontology 411,
44, processing module 45, memory module 46, LED light 47 and transmission module 48.
The output end of the GPS antenna 41 successively with pre-amplifier module 42, frequency-variable module 43, receiving module 44, place
Module 45, transmission module 48 and interface module 49 is managed to be connected.Furthermore it is preferred that the interface module 49 includes PPS pulse per second (PPS)s
Output channel and power delivery channel can be respectively used to output synchronizing signal and transmit electric energy for power module, while it is also propped up
Two kinds of mounting means of AMP aviation plugs and contact pin type are held, the measurement of large-scale grounding network characterisitic parameter can be connected in a manner of external respectively
Variable frequency signal source in system is fixed on built-in manner inside adjustable frequency multimeter.
The processing module 45 is also bi-directionally connected with memory module 46, for storing the signal after decoding, operation；And
It is unidirectionally connect with LED light 47, is used to indicate the working condition that GPS synchronizes reception device.
The input terminal of the power module 410 is connected with the output end all the way of interface module 49, can generate+3V voltages letter
Number, the normal work for synchronizing reception device ontology 411 for GPS provides electric energy.
In this way, a kind of GPS synchronization reception devices for grounded screen shunting phase-shift measurement of the present invention, GPS days
Line 41 receives the weak electromagnetic wave that GPS artificial earths satellite are sent out and is converted to current signal, passes through preamplifier mould successively
Block 42 carries out the frequency conversion process of signal amplification and frequency-variable module 43, is sent into receiving module 44 later and carries out signal trace, connects
It receives, treated module 45 is decoded signal, calculation process, and signal can be stored in memory module 46 at this time, and
And LED light flickers, and indicates that GPS synchronizes reception device and can work normally.Finally, by treated, signal is passed through with telegraph text form
Transmission module 48 is sent to interface module 49, to realize the output of PPS pulse per second (PPS) synchronizing signals.
Above-mentioned GPS synchronizes reception device, can be carried out by receiving the PPS pps pulse per second signals that GPS artificial earths satellite provide
It is synchronous, can directly in large-scale grounding network characterisitic parameter measuring system variable frequency signal source and the cooperation of adjustable frequency multimeter make
With, be grounded net shunting phase shift accurate measurement.
By above-mentioned setting, the first GPS module of the present invention and the second GPS module can be made to have following advantages：
First, having the characteristics that signal reception is stable, transmission range is wide, can not be limited by field test environmental condition,
It is grounded the accurate measurement of net shunting phase shift；
Second is that compact structure is light, is easily installed, supports two kinds of mounting means of AMP aviation plugs and contact pin type, can distinguish
The variable frequency signal source in large-scale grounding network characterisitic parameter measuring system is connected in a manner of external or is fixed on built-in manner adjustable
Inside frequency multimeter.
The specific implementation mode of the present invention is above are only, but the design concept of the present invention is not limited thereto, it is all to utilize this
Conceive the change for carrying out unsubstantiality to the present invention, the behavior for invading the scope of the present invention should all be belonged to.
Claims (8)
1. a kind of earthing or grounding means GPS shunts phase shift test device, it is characterised in that：Including variable frequency signal source, coupling transformer with
And adjustable frequency multimeter；The variable frequency signal source, which includes at least, non-power-frequency current signal generating module and the first GPS module；Institute
The input terminal for stating coupling transformer is connected with variable frequency signal source, and the two is used cooperatively, and is reserved with alien frequencies signal output terminal；Institute
Stating adjustable frequency multimeter and including at least has current acquisition module, voltage acquisition module and the second GPS module, the electric current to adopt
The input terminal of collection module coupling transformer is connected with variable frequency signal source, the input terminal of the coupling transformer be provided with for electricity
Flow the connected flexible current coil of acquisition module, when test, includes the following steps,
Step S1, earthing or grounding means GPS shunting phase shift test systems are sustainedly and stably injected to the measuring loop arranged in advance
One non-power-frequency current signal；
Step S2, earthing or grounding means GPS shunt the GPS module on variable frequency signal source and adjustable frequency multimeter in phase shift test system
It keeps synchronizing by receiving the PPS pps pulse per second signal moment that GPS artificial earths satellite provide；
Step S3, acquire and calculate injection non-power-frequency current signal and generation alien frequencies voltage drop respectively with respective GPS moulds
The phase difference at PPS pps pulse per second signal rising edges on block、, using the alien frequencies voltage drop as refer to benchmark, even, then the phase of injected non-power-frequency current signal be；
Step S4 is gone out while non-power-frequency current signal injects using flexible current coil and GPS second pulse signal synchro measure
Shunting signal and the phase difference at PPS pps pulse per second signal rising edges in GPS module on certain disengaging line architecture；
Step S5, if complete all disengaging line architecture shunting signals and the phase in GPS module at PPS pps pulse per second signals rising edge
The measurement of potential difference, if so, S6 is entered step, if it is not, then return to step S4 carries out duplicate measurements, to obtain each inlet-outlet line structure
Frame shunts phase difference、、 ；
Step S6, with step S3, still with alien frequencies voltage dropAs with reference to benchmark, the shunting phase of each disengaging line architecture is calculated
It moves, respectively、、 ；
The variable frequency signal source, including first microprocessor module, power module, emergency braking module, non-power-frequency current signal hair
Raw module, current stabilization module, the first isolation filter module, the first A/D modules, LCD is shown and state indicator module, fault alarm mould
Block, the first keyboard input module and the first GPS module；
The coupling transformer, including impedance gear gating switch, multistage tap winding module, stimulus output module, letter
Number detection module；
The adjustable frequency multimeter, including current acquisition module, voltage acquisition module, the second isolation filter module, the 2nd A/D
Module, the second microprocessor module, the second keyboard input module, LCD display module, the second GPS module, memory module, USB are passed
Defeated module, charging interface module, rechargeable battery；
One output end of first microprocessor module in the variable frequency signal source is connected with an input terminal of power module, first
First the output end of the power module and emergency braking module collective effect after non-power-frequency current signal generating module with current stabilization mould
Block is connected, and is then exported successively with impedance gear gating switch, multistage tap winding module, the stimulus in coupling transformer
Module is connected, and at the same time, the signal detection module in the coupling transformer is also defeated with multistage tap winding module respectively
The output end for entering end and stimulus output module is connected, later again successively with the first isolation filter mould in variable frequency signal source
Block, the first A/D modules, first microprocessor module are connected, and the matching of variable frequency signal source and coupling transformer uses, to realize
The continual and steady output of non-power-frequency current signal；
Filter is isolated with second successively in the output end of current acquisition module and voltage acquisition module in the adjustable frequency multimeter
Wave module, the 2nd A/D modules, the second microprocessor module and LCD display module are connected；Second microprocessor module
Two input terminals are connected with the output end of the second GPS module, the second keyboard input module, are respectively used to be grounded net shunting phase
Move synchro measure and operational order input；And two groups of input/output terminals simultaneously also with memory module and USB transmission module phase
Even, it is respectively used to carry out test record storage and export；The charging interface module is connected with rechargeable battery, be respectively used into
Row charging and storage electric energy are simultaneously powered for modules.
2. a kind of earthing or grounding means GPS shunts phase shift test device as described in claim 1, it is characterised in that：The coupling transformation
Device further includes winding temperature detection module, and the multistage tap winding module is also connected with the winding temperature detection module, institute
It includes a plurality of windings to state multistage tap winding module, and the winding temperature detection module includes be built in each winding at least one
A self-resetting temperature heat sensor, the temperature heat sensor is for showing winding primary side and secondary side in coupling transformer
Real time temperature, and can automatically cut off the power protection coupling transformer in the case where load is excessive or apparatus overheat.
3. a kind of earthing or grounding means GPS shunts phase shift test device as described in claim 1, it is characterised in that：The first GPS moulds
It is subsynchronous that one is carried out when every with GPS artificial earths satellite the 10th PPS pulse per second (PPS) of block.
4. a kind of earthing or grounding means GPS shunts phase shift test device as described in claim 1, it is characterised in that：The adjustable frequency
The frequency measurement of multimeter ranging from 40Hz ~ 69Hz, stepping amplitude, which is 0.1Hz and 1Hz users, to be set, when frequency stepping amplitude is
When 0.1Hz, every 10th PPS pulse per second (PPS) of the second GPS module and GPS artificial earths satellite on the adjustable frequency multimeter
Shi Jinhang mono- is subsynchronous；When frequency stepping amplitude is 1Hz, the second GPS module on the adjustable frequency multimeter and GPS people
It is subsynchronous that one is carried out when making every 1st PPS pulse per second (PPS) of earth satellite.
5. a kind of earthing or grounding means GPS shunts phase shift test device as described in claim 1, it is characterised in that：The frequency variation signal
Source and/or the adjustable frequency multimeter can simultaneous display GPS states, station-keeping mode, live longitude and latitude, the UTC coordinations worlds
When, current sync number of satellite information.
6. a kind of earthing or grounding means GPS shunts phase shift test device as described in claim 1, it is characterised in that：The adjustable frequency
The current acquisition module of multimeter is configured with double-flexibility current coil Sampling Interface simultaneously, is respectively used to external Rogowski coil
Or ACP3000 coils, wherein the current measuring range of Rogowski coil is 0 ~ 200A, and the current range of ACP3000 coils is
0 ~ 3000A, the adjustable frequency multimeter further include input impedance gear switch module, and the voltage acquisition module is also defeated with this
Enter impedance gear switch module collective effect in the second isolation filter module, for switching different input impedance gears, with reality
The measurement of existing open-circuit voltage and simulation human body resistance carry out the measurement of contact voltage, step voltage, the adjustable frequency general-purpose
Further include the BNC output modules that non-power-frequency current waveform is checked for external oscillograph in table, second microprocessor module is also
It is connected with BNC output modules.
7. a kind of earthing or grounding means GPS shunts phase shift test device as described in claim 1, it is characterised in that：The coupling transformation
The input terminal of impedance gear gating switch in device is connected with the output end of first microprocessor module in variable frequency signal source, described
Further include working status indication module in coupling transformer, the stimulus output module and working status indication module phase
Even, the coupling transformer further includes reference voltage output module, the stimulus output module also with reference voltage output
Module is connected, at least one set of impedance gear built in the reference voltage output module.
8. a kind of earthing or grounding means GPS shunts phase shift test device as described in claim 1, it is characterised in that：The first GPS moulds
Block and/or the second GPS module are that a GPS synchronizes reception device, and it includes that GPS synchronizes reception device sheet which, which synchronizes reception device,
Body, interface module and the power module for providing electric energy for GPS synchronization reception device ontology normal works, the GPS are same
Step reception device ontology includes being sequentially connected the GPS antenna connect, pre-amplifier module, frequency-variable module, receiving module, processing mould
Block and transmission module, the input terminal of the power module are connected with the output end all the way of interface module, the transmission module
Output end is connected with the input terminal of the interface module.
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| CN108180937B (en) * | 2017-12-19 | 2020-09-18 | 四川大唐国际甘孜水电开发有限公司 | Safe replacement method for sensor in monitoring circuit of power plant control system |
| CN110470970B (en) * | 2019-07-09 | 2021-09-21 | 广州兴森快捷电路科技有限公司 | Method for dynamically monitoring passive intermodulation |
| CN110687380A (en) * | 2019-10-18 | 2020-01-14 | 国网湖南省电力有限公司 | Ground grid shunting vector testing system based on GPS source meter synchronization and application method thereof |
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Address after: 361001 one of the 1002 units of No. 3 Nantou Road, Siming District, Xiamen, Fujian. Applicant after: Red phase Limited by Share Ltd Address before: 361001 E 21 unit, Hai Guang building, 33 Narcissus Road, Siming Road, Xiamen, Fujian Applicant before: Xiamen Red Phase Instruments Inc. |
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