CN202948066U - Double coupling type on-line monitoring device for power transmission line grounding impedance - Google Patents
Double coupling type on-line monitoring device for power transmission line grounding impedance Download PDFInfo
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- CN202948066U CN202948066U CN 201220665423 CN201220665423U CN202948066U CN 202948066 U CN202948066 U CN 202948066U CN 201220665423 CN201220665423 CN 201220665423 CN 201220665423 U CN201220665423 U CN 201220665423U CN 202948066 U CN202948066 U CN 202948066U
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- power amplifier
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 17
- 230000001808 coupling Effects 0.000 title claims abstract description 17
- 238000010168 coupling process Methods 0.000 title claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000002847 impedance measurement Methods 0.000 claims abstract description 9
- 230000001939 inductive effect Effects 0.000 claims abstract description 8
- 230000005294 ferromagnetic Effects 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims abstract description 5
- 230000005611 electricity Effects 0.000 claims description 12
- 239000000523 sample Substances 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 4
- 230000005291 magnetic Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The utility model provides a double coupling type on-line monitoring device for power transmission line grounding impedance and belongs to the technical field of electrical measurement. The double coupling type on-line monitoring device comprises a microprocessor module (1), an impedance measurement circuit module (2), a double coupling annular ferromagnetic measuring probe (3) and a power management module (4), wherein the microprocessor module (1) is provided with a key, a display screen, a serial data communication interface and an M3 processor; the impedance measurement circuit module (2) is provided with a power amplifier, an impedance measurement chip and an over-voltage protection circuit; an exciting coil and an induction coil are wound on the double coupling annular ferromagnetic measuring probe (3), and the power management module (4) converts battery voltage into a power amplifier power source and a signal processing circuit power source. The double coupling type on-line monitoring device for the power transmission line grounding impedance effectively meets the requirements in practical application.
Description
Technical field
The utility model relates to the electrical measurement technical field, particularly relates to a kind of pair of manifold type transmission line of electricity impedance ground on-Line Monitor Device.
Background technology
The ground state of high-voltage power transmission tower ground connection whether good with the anti-thunder ability of circuit, reduce tripping rate with lightning strike, guaranteeing that transmission of electricity is safe has an important relationship.And the on-line measurement of stake resistance is the important step of high-voltage power transmission tower safety monitoring.
The measurement of stake resistance at present roughly is divided into the three line measuring methods that auxiliary electrode is arranged and the two coupling measurement methods that need not the subsidiary electrode.For ease of directly accessing ground loop to be measured, coupling probe is made opening form, also referred to as pincerlike mensuration.The utility model is based on two coupling (pincer) measuring methods that need not the subsidiary electrode.
But present pincerlike ground resistance measuring instrument device mostly is the hand-held pincerlike meter, and the response signal of measurement mechanism to measuring sonde adopts multistage simulation amplification and filtering technique, and not only circuit is complicated, and power consumption is higher.And only be used for carrying out field maintemance interim measurement and inspection.Can not meet the real time on-line monitoring of pole tower ground resistance.
Therefore, instantly need a urgent technical matters that solves to be exactly: how can propose a kind of effective measures, to solve problems of the prior art.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of manifold type transmission line of electricity impedance ground on-Line Monitor Device, effectively satisfies the demand of practical application.
In order to address the above problem, the utility model discloses a kind of manifold type transmission line of electricity impedance ground on-Line Monitor Device, comprise the microprocessor module (1) with button and display screen, serial data communication interface and M3 processor; Impedance measuring circuit module (2) with power amplifier and impedance measurement chip, overvoltage crowbar; Be wound with the coupling magnetic measurement probe (3) of drive coil and inductive coil and cell voltage converted to the power management module (4) of power amplifier power supply and signal processing circuit power supply.
Further, microprocessor module (1) and the I of impedance measuring circuit module (2) by processor
2C interface is connected, and sends measuring command and receives measurement data.
Further, the measurement chip output in described impedance measuring circuit module (2) is connected with the input end of power amplifier, and the output terminal of power amplifier is connected through the drive coil (3-1) of overvoltage crowbar with coupling magnetic measurement probe (3); Measurement special chip input end in impedance measuring circuit module (2) is connected through the inductive coil (3-2) of overvoltage crowbar with coupling magnetic measurement probe (3), forms one and measures loop.
Further, the button of microprocessor module (1) and display screen directly show data.
Further, described display screen is LCD display.
To sum up, the manifold type transmission line of electricity impedance ground on-Line Monitor Device that the utility model provides can effectively satisfy the demand of practical application.
Description of drawings
Fig. 1 the utility model hardware block diagram;
Fig. 2 the utility model processor circuit module principle figure;
Fig. 3 impedance measurement modular circuit of the present utility model schematic diagram;
The annular ferromagnetic measuring sonde structural representation of the two coupling of Fig. 4 the utility model;
Fig. 5 the utility model probe overvoltage crowbar schematic diagram;
Fig. 6 the utility model scheme of installation.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the utility model hardware block diagram, and this device comprises the microprocessor module (1) with button, LCD display and serial data interface and M3 processor; Form with power amplifier and impedance measurement special chip, with the impedance measuring circuit module (2) of overvoltage crowbar; Be wound with two coupling annular ferromagnetic measuring sondes (3) of drive coil (3-1) and inductive coil (3-2) and cell voltage converted to the power management module (4) of power amplifier power supply and signal processing circuit power supply.
As shown in Figure 2, flush bonding processor is powered by power module, adopts I between processor and impedance measurement chip
2C communication interface, control group are measured chip and under different excitation frequencies, induced signal are carried out acquisition and processing, and the data that obtain are processed are by analysis obtained stake resistance numerical value.
As shown in Figure 3, the sine wave signal of impedance measurement chip output is through after direct sum filtering, then carries out power amplification by audio-frequency power amplifier, after amplifying through differential power, by side a and b output in figure.
As shown in Figure 4, in figure, 1 is incentive probe, and in figure, 2 are the response probe, and incentive probe and response probe are all to be made of the high magnetic permeability magnet ring that is wound with coil.When measuring, load pumping signal on incentive probe, produce induction on the response probe.Be that in Fig. 3, side a and b is connected with the side a and b of (3-1) in Fig. 4, with the D of (3-2) in Fig. 4 end ground connection, and the C end is connected with C end in Fig. 3.
As shown in Figure 5, A, B in figure, C, D end are connected with A, B, C, D in Fig. 4 respectively, and in figure, T1, T2, T3, T4 are over-voltage protectors, suppress the overvoltages such as the external lightning interference of probe induction, and on fender, other chips and circuit can not be damaged.
As Fig. 6, as application example, in the installation of scheme described in the utility model on the pole tower ground resistance Online Transaction Processing, when wireless module is received test command, issue corresponding order of the utility model module, module starts test procedure to be measured, and then test result is transferred to inspection center with communication, has realized the on-line real time monitoring of stake resistance.
Above manifold type transmission line of electricity impedance ground on-Line Monitor Device provided by the utility model is described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (5)
1. a two manifold type transmission line of electricity impedance ground on-Line Monitor Device, comprising: with the microprocessor module (1) of button and display screen, serial data communication interface and M3 processor; Impedance measuring circuit module (2) with power amplifier and impedance measurement chip, overvoltage crowbar; Be wound with two coupling annular ferromagnetic measuring sondes (3) of drive coil and inductive coil and cell voltage converted to the power management module (4) of power amplifier power supply and signal processing circuit power supply.
2. as claimed in claim 1 pair of manifold type transmission line of electricity impedance ground on-Line Monitor Device, it is characterized in that, microprocessor module (1) is connected with the I2C interface of impedance measuring circuit module (2) by processor, sends measuring command and receives measurement data.
3. manifold type transmission line of electricity impedance ground on-Line Monitor Device as claimed in claim 1, it is characterized in that, measurement chip output in described impedance measuring circuit module (2) is connected with the input end of power amplifier, and the output terminal of power amplifier is connected through the drive coil (3-1) of overvoltage crowbar with the annular ferromagnetic measuring sonde of two coupling (3); Measurement special chip input end in impedance measuring circuit module (2) is connected through the inductive coil (3-2) of overvoltage crowbar with the annular ferromagnetic measuring sonde of two coupling (3), forms one and measures loop.
4. manifold type transmission line of electricity impedance ground on-Line Monitor Device as claimed in claim 1, is characterized in that, button and the display screen of microprocessor module (1) directly show data.
5. manifold type transmission line of electricity impedance ground on-Line Monitor Device as claimed in claim 1, is characterized in that, described display screen is LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220665423 CN202948066U (en) | 2012-12-05 | 2012-12-05 | Double coupling type on-line monitoring device for power transmission line grounding impedance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220665423 CN202948066U (en) | 2012-12-05 | 2012-12-05 | Double coupling type on-line monitoring device for power transmission line grounding impedance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202948066U true CN202948066U (en) | 2013-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220665423 Expired - Lifetime CN202948066U (en) | 2012-12-05 | 2012-12-05 | Double coupling type on-line monitoring device for power transmission line grounding impedance |
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| Country | Link |
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| CN (1) | CN202948066U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018571A (en) * | 2012-12-05 | 2013-04-03 | 北京工业大学 | Dual-coupling type on-line monitoring device of ground impedance of electric transmission line |
-
2012
- 2012-12-05 CN CN 201220665423 patent/CN202948066U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018571A (en) * | 2012-12-05 | 2013-04-03 | 北京工业大学 | Dual-coupling type on-line monitoring device of ground impedance of electric transmission line |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130522 |