CN205787074U - A kind of grounding device tester anti-Hz noise capability evaluation device - Google Patents
A kind of grounding device tester anti-Hz noise capability evaluation device Download PDFInfo
- Publication number
- CN205787074U CN205787074U CN201620488419.0U CN201620488419U CN205787074U CN 205787074 U CN205787074 U CN 205787074U CN 201620488419 U CN201620488419 U CN 201620488419U CN 205787074 U CN205787074 U CN 205787074U
- Authority
- CN
- China
- Prior art keywords
- resistance
- tester
- frequency
- earth
- grounding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000011156 evaluation Methods 0.000 title claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 26
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000004088 simulation Methods 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 9
- 238000012797 qualification Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
This utility model belongs to power system earth mat test instrunment qualification technical field, particularly relates to a kind of grounding device tester anti-Hz noise capability evaluation device.A kind of device for verifying grounding device tester performance.This utility model is to ground connection device to test instrument earth resistance and grounded screen to be carried out the device that weak voltage signal measures；First grounded screen being injected a non-power-frequency current, electric current forms loop between grounded screen and electric current pole.This utility model device can effectively assess grounding device tester grounding resistance measurement and the anti-Hz noise ability of light current pressure signal measurement, it is ensured that can obtain grounding device characterisitic parameter accurate, real when the instrument of buying is tested at the scene.
Description
Technical field
This utility model belongs to power system earth mat test instrunment qualification technical field, particularly relates to a kind of grounding device tester anti-Hz noise capability evaluation device.A kind of device for verifying grounding device tester performance.
Background technology
Grounding device is the important protection device in electrical network, is to ensure that one of power system safety and stability operation and the important measures ensureing operations staff's personal safety.The safety and reliability of grounding device is constantly subjected to produce and the great attention of the department of operation.Currently for state estimation many employings alien frequencies method of grounding device, interference electric current is separated with measuring signal code, is allowed to not enter measurement system, to eliminate the zero-sequence current impact on earth loop impedance test.A lot of for the test apparatus of grounding device state estimation based on this principle, but the test apparatus of each producer is not quite similar for the capacity of resisting disturbance of power frequency component, therefore for this phenomenon, ground connection device to test instrument anti-Hz noise ability can be estimated in the urgent need to a kind of device.
Utility model content
In place of above-mentioned the deficiencies in the prior art, this utility model provides a kind of grounding device tester anti-Hz noise capability evaluation device.Its object is to for on-the-spot actual earth resistance situation, build test loop, press the anti-Hz noise ability of signal measurement to be estimated analyzing ground connection device to test instrument grounding resistance measurement and light current by increasing the power current in power frequency electric potential source dry run transformer station.
In order to realize foregoing invention purpose, this utility model is achieved through the following technical solutions:
A kind of grounding device tester anti-Hz noise capability evaluation device, is to ground connection device to test instrument earth resistance and grounded screen to be carried out the device that weak voltage signal measures；
When being used for ground connection device to test instrument grounding resistance measurement, this device is to be connected with equivalent current electrode resistance Rc by the earth resistance tester electric current pole C1 on earth resistance tester, equivalent current electrode resistance Rc is connected with simulating tested earth resistance Rg, simulate tested earth resistance Rg to be connected with earth resistance tester electric current pole C2, constitute current loop；The outfan of power frequency electric potential source is connected to the input of isolating transformer Tr；Earth resistance tester voltage pole P1 on earth resistance tester is connected with equivalent voltage electrode resistance Rp, equivalent voltage electrode resistance Rp is connected with an outfan of isolating transformer Tr, another outfan of isolating transformer Tr is connected with simulating tested earth resistance Rg, simulates tested earth resistance Rg and earth resistance tester voltage pole P2 and connects and composes voltage circuit.
Described time grounded screen is carried out light current pressure signal measurement, one end of frequency conversion type experiment power supply be connected with divider resistance Rm, divider resistance Rm with simulate measured resistance RLConnect, simulate measured resistance RLTested loop is connected and composed with the other end of frequency conversion type experiment power supply；Frequency-selecting ammeter wiring terminal A on frequency-selecting ammeter and simulation measured resistance RLConnect, frequency-selecting ammeter wiring terminal B and simulation measured resistance RLConnect, constitute test loop；The outfan of power frequency electric potential source is connected to the input of isolating transformer Tr, and the outfan of isolating transformer Tr is connected with adjustable resistance R, adjustable resistance R and simulation measured resistance RLConnect, another outfan of isolating transformer Tr and simulation measured resistance RLConnect, constitute interference loop.
Described power frequency electric potential source, in the case of power frequency electric potential source does not puts into, frequency-selecting ammeter is connected to simulate measured resistance R by frequency-selecting ammeter wiring terminal A and frequency-selecting ammeter wiring terminal BLTwo ends, measure analog measured resistance RLMagnitude of voltage.
This utility model hinge structure has the advantage that and beneficial effect:
This utility model can effectively assess grounding device tester grounding resistance measurement and the anti-Hz noise ability of light current pressure signal measurement, it is ensured that can obtain grounding device characterisitic parameter accurate, real when the instrument of buying is tested at the scene.
With specific embodiment, this utility model is described in further detail below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is that this utility model device assesses grounding resistance measurement anti-Hz noise ability wiring diagram；
Fig. 2 is this utility model device assessment light current pressure signal measurement anti-Hz noise ability wiring diagram
In figure: earth resistance tester 1, earth resistance tester electric current pole C12, earth resistance tester voltage pole P1 3, equivalent voltage electrode resistance Rp4, equivalent current electrode resistance Rc 5, simulate tested earth resistance Rg6, power frequency electric potential source 7, earth resistance tester voltage pole P2 8, earth resistance tester electric current pole C2 9, isolating transformer Tr10, adjustable resistance R11, frequency-selecting ammeter 12, frequency conversion type experiment power supply 13, frequency-selecting ammeter wiring terminal A 14, frequency-selecting ammeter wiring terminal B15, simulate measured resistance RL 16, divider resistance Rm17.
Detailed description of the invention
This utility model is a kind of grounding device tester anti-Hz noise capability evaluation device.As shown in the figure, in Fig. 1, earth resistance tester electric current pole C12 on earth resistance tester 1 is connected with equivalent current electrode resistance Rc 5, equivalent current electrode resistance Rc 5 is connected with simulating tested earth resistance Rg6, simulate tested earth resistance Rg 6 to be connected with earth resistance tester electric current pole C29, constitute current loop；The outfan of power frequency electric potential source 7 is connected to the input of isolating transformer Tr10；Earth resistance tester voltage pole P13 on earth resistance tester 1 is connected with equivalent voltage electrode resistance Rp4, equivalent voltage electrode resistance Rp4 is connected with an outfan of isolating transformer Tr10, another outfan of isolating transformer Tr10 is connected with simulating tested earth resistance Rg6, simulates tested earth resistance Rg 6 and earth resistance tester voltage pole P2 8 and connects and composes voltage circuit
In Fig. 2, one end of frequency conversion type experiment power supply 13 is connected with divider resistance Rm17, divider resistance Rm17 and simulation measured resistance RL16 connect, and simulate measured resistance RL16 connect and compose tested loop with the other end of frequency conversion type experiment power supply 13；Frequency-selecting ammeter wiring terminal A14 on frequency-selecting ammeter 12 and simulation measured resistance RL16 connect, frequency-selecting ammeter wiring terminal B15 and simulation measured resistance RL 16 connect, and constitute test loop；The outfan of power frequency electric potential source 7 is connected to the input of isolating transformer Tr10, and the outfan of isolating transformer Tr10 is connected with adjustable resistance R11, adjustable resistance R11 and simulation measured resistance RL16 connect, another outfan of isolating transformer Tr10 and simulation measured resistance RL16 connect, and constitute interference loop.
During the work of this utility model one grounding device tester anti-Hz noise capability evaluation device, the operating procedure being estimated is:
When using alien frequencies method to carry out Resistance of Grounding Grids measurement, first grounded screen being injected a non-power-frequency current, electric current forms loop between grounded screen and electric current pole, obtains a Potential distribution on grounded screen surrounding earth surface.Then choose Zero potential reference and boost voltage pole is set, fetch the voltage signal of zero-potential point from boost voltage pole, i.e. can get the grounding resistance of grounded screen.
In actual test process, owing to running superposition power current in the grounded screen of transformer station, if test instrunment is strong for the capacity of resisting disturbance of power frequency component, final test result certainly will be had a huge impact.
This utility model is for on-the-spot actual earth resistance situation, build test loop, press the anti-Hz noise ability of signal measurement to be estimated analyzing ground connection device to test instrument grounding resistance measurement and light current by increasing the power current in power frequency electric potential source dry run transformer station.
As it is shown in figure 1, in FIG, electric current pole C1 2, the voltage pole P13 of earth resistance tester 1 and electric current pole C2 9, voltage pole P2 8 constitute loop through equivalent current electrode resistance Rc 5 and equivalent voltage electrode resistance Rp 4, test simulation tested earth resistance Rg 6.Adding power frequency electric potential source 7 imitating substation Hz noise in voltage circuit, the outfan of power frequency electric potential source 7 is connected to the input of isolating transformer Tr10, and isolating transformer Tr10 is the magnitude of voltage for regulating Hz noise.
During assessment grounding resistance measurement anti-Hz noise ability, first suitable frequency (non-power frequency) and suitable size are transferred in the output of earth resistance tester 1 power supply, in the case of power frequency electric potential source 7 does not puts into, value with earth resistance tester 1 test simulation tested earth resistance Rg6, then power frequency electric potential source 7 switches on power, interference signal is produced through isolating transformer Tr10, observe the resistance value of earth resistance tester test, compare with test value when not adding interference, assess earth resistance tester anti-Hz noise performance indications.
In Fig. 2, frequency conversion type experiment power supply 13 and divider resistance Rm17 and simulation measured resistance RL16 constitute tested loop, and the outfan of power frequency electric potential source 7 is connected to the input of isolating transformer Tr10.In the case of power frequency electric potential source 7 does not puts into, frequency-selecting ammeter 12 is connected to simulate measured resistance R by frequency-selecting ammeter wiring terminal A14 and frequency-selecting ammeter wiring terminal B 15L16 two ends, measure analog measured resistance RLThe magnitude of voltage of 16.
When grounded screen is carried out light current pressure signal measurement,In the case of power frequency electric potential source 7 puts into, in simulation measured resistance RLPower-frequency voltage interference is produced on 16.First the output of frequency conversion type experiment power supply 13 is transferred to suitable frequency (non-power frequency) and suitable size, when power frequency electric potential source 7 and isolating transformer Tr10 are not powered on, records the magnitude of voltage U of now frequency selective voltmeter 12 test1.After connecting power frequency electric potential source 7 and isolating transformer Tr10, by regulating the size of adjustable resistance R11, can be in simulation measured resistance RLProducing different Hz noise voltage on 16, magnitude of voltage U2, U2 and the U1 of record frequency selective voltmeter test compares the most again, assesses frequency selective voltmeter anti-Hz noise performance indications.
Claims (3)
1. a grounding device tester anti-Hz noise capability evaluation device, is characterized in that: to ground connection device to test instrument earth resistance and grounded screen is carried out the device that weak voltage signal measures；
When being used for ground connection device to test instrument grounding resistance measurement, this device is by the earth resistance tester electric current pole C1(2 on earth resistance tester (1)) with equivalent current electrode resistance Rc(5) be connected, equivalent current electrode resistance Rc(5) with simulate tested earth resistance Rg(6) be connected, simulate tested earth resistance Rg(6) with earth resistance tester electric current pole C2(9) be connected, constitute current loop；The outfan of power frequency electric potential source (7) is connected to isolating transformer Tr(10) input；Earth resistance tester voltage pole P1(3 on earth resistance tester (1)) with equivalent voltage electrode resistance Rp(4) be connected, equivalent voltage electrode resistance Rp(4) with isolating transformer Tr(10) an outfan be connected, isolating transformer Tr(10) another outfan and simulate tested earth resistance Rg(6) is connected, simulate tested earth resistance Rg (6) and earth resistance tester voltage pole P2 (8) connect and compose voltage circuit.
A kind of grounding device tester anti-Hz noise capability evaluation device the most according to claim 1, it is characterized in that: described time grounded screen is carried out light current pressure signal measurement, by one end and the divider resistance Rm(17 of frequency conversion type experiment power supply (13)) it is connected, divider resistance Rm(17) and simulation measured resistance RL(16) connect, simulate measured resistance RL(16) other end with frequency conversion type experiment power supply (13) connects and composes tested loop；Frequency-selecting ammeter wiring terminal A(14 on frequency-selecting ammeter (12)) and simulation measured resistance RL(16) connect, frequency-selecting ammeter wiring terminal B(15) and simulation measured resistance RL(16) connect, constitute test loop；The outfan of power frequency electric potential source (7) is connected to isolating transformer Tr(10) input, isolating transformer Tr(10) outfan and adjustable resistance R(11) be connected, adjustable resistance R(11) with simulation measured resistance RL(16) connect, isolating transformer Tr(10) another outfan with simulation measured resistance RL(16) connect, constitute interference loop.
A kind of grounding device tester anti-Hz noise capability evaluation device the most according to claim 1, it is characterized in that: described power frequency electric potential source (7), in the case of power frequency electric potential source (7) does not puts into, frequency-selecting ammeter (12) passes through frequency-selecting ammeter wiring terminal A(14) and frequency-selecting ammeter wiring terminal B(15) be connected to simulate measured resistance RL(16) two ends, measure analog measured resistance RL(16) magnitude of voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620488419.0U CN205787074U (en) | 2016-05-25 | 2016-05-25 | A kind of grounding device tester anti-Hz noise capability evaluation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620488419.0U CN205787074U (en) | 2016-05-25 | 2016-05-25 | A kind of grounding device tester anti-Hz noise capability evaluation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205787074U true CN205787074U (en) | 2016-12-07 |
Family
ID=58110568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620488419.0U Active CN205787074U (en) | 2016-05-25 | 2016-05-25 | A kind of grounding device tester anti-Hz noise capability evaluation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205787074U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054093A (en) * | 2016-05-25 | 2016-10-26 | 国网辽宁省电力有限公司电力科学研究院 | Anti-power line interference capability assessment device of grounding device tester |
| CN106771484A (en) * | 2016-12-15 | 2017-05-31 | 平度市田庄镇官庄小学 | A kind of measurement ground and the method for underground point-to-point transmission power-frequency voltage |
-
2016
- 2016-05-25 CN CN201620488419.0U patent/CN205787074U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054093A (en) * | 2016-05-25 | 2016-10-26 | 国网辽宁省电力有限公司电力科学研究院 | Anti-power line interference capability assessment device of grounding device tester |
| CN106771484A (en) * | 2016-12-15 | 2017-05-31 | 平度市田庄镇官庄小学 | A kind of measurement ground and the method for underground point-to-point transmission power-frequency voltage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103954925B (en) | A kind of fault oscillograph dynamic testing method based on RTDS real-time simulation | |
| CN104155626B (en) | The system that ground potential climbing capacity resisted by a kind of detection voltage transformer | |
| CN103091609A (en) | Performance detecting system and method thereof of gas insulated substation (GIS) partial discharge on-line monitoring device | |
| WO2014173314A1 (en) | System for testing property of thunder and lightning traveling wave of power transmission line | |
| CN102636768B (en) | A kind of lightning arrester on-line computing model on-line testing method | |
| CN104535844A (en) | Method for testing grounding resistance of tower by using disassembly-free down conductor | |
| CN103901384B (en) | Analog quantity and digital quantity outputting standard power source detection device and method | |
| CN105548942A (en) | System and method for analyzing transient characteristics of electronic current transformer | |
| CN104931793B (en) | A kind of grounding net of transformer substation impedance ground acquisition methods | |
| CN109557372B (en) | Impact power frequency grounding impedance comprehensive testing device | |
| CN105510719A (en) | Three-phase power grid harmonic impedance measurement method | |
| CN203324403U (en) | Power distribution network feed line protection digital dynamic test system comprising distributed power sources | |
| CN205787074U (en) | A kind of grounding device tester anti-Hz noise capability evaluation device | |
| CN106054093B (en) | A kind of anti-Hz noise capability evaluation device of earthing or grounding means tester | |
| CN204903655U (en) | Tower grounding resistance measurement device of disconnect ground downlead exempts from | |
| CN106645860B (en) | Substation grounding equipment energy characteristic parameter detecting check system | |
| CN108761223B (en) | System and method for testing output synchronism of traveling wave protection testing device | |
| CN204515078U (en) | Live detection test unit is put in high-tension switch cabinet office based on defects simulation | |
| CN206804829U (en) | A kind of SF6 density monitors calibration equipment | |
| CN105866592A (en) | System and method for acquiring dynamic reactive power compensation response waveforms | |
| CN104361802B (en) | A kind of capacitive apparatus electrical operation analogue means | |
| CN110927528A (en) | Transmission line fault simulation test device | |
| CN104062619B (en) | Verification system for on-line monitoring device of double-signal-source capacitive equipment | |
| CN206618805U (en) | A kind of super-huge Grounding impedance measurement device | |
| CN204028345U (en) | A kind of system that detects voltage transformer (VT) and resist earth potential climbing capacity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |