CN109342796A - Heavy-current measuring device in a kind of ultra-high-tension power transmission line - Google Patents
Heavy-current measuring device in a kind of ultra-high-tension power transmission line Download PDFInfo
- Publication number
- CN109342796A CN109342796A CN201811478254.9A CN201811478254A CN109342796A CN 109342796 A CN109342796 A CN 109342796A CN 201811478254 A CN201811478254 A CN 201811478254A CN 109342796 A CN109342796 A CN 109342796A
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- Prior art keywords
- signal
- current
- ultra
- heavy
- power transmission
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/22—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/241—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using electro-optical modulators, e.g. electro-absorption
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention devises heavy-current measuring device in a kind of ultra-high-tension power transmission line, it is popped one's head in using traditional current transformer, tested current signal is converted into low current signal, tested current signal is converted to by a special micro energy lose modulation circuit light pulse signal of pulsewidth, pulse-position modulation, then the measured signal of modulation is transferred to by instrument control terminal by optical fiber and is handled.
Description
Technical field
The invention belongs to electrical engineering field, in particular to heavy-current measuring device in a kind of ultra-high-tension power transmission line.
Background technique
In recent years as the high speed development of national economy, electrical network capacity and transmission distance constantly increase, Operating Voltage
Constantly promoted.Under the premise of guaranteeing the safe operation of system, improving the quality of power generation, the fortune of equipment is also given full play to
Row ability, therefore real-time monitoring is carried out to the parameter of Operation of Electric Systems and proposes new higher requirement.For a long time, high pressure
Current measurement work on power grid is always to be completed by traditional electromagnetic current transducer.However current transformer exists
The problem of be: magnetic saturation, frequency band be narrow, ferromagnetic resonance, dynamic range are small and oily inflammable and explosive etc..These are in electric system of new generation
The fields such as on-line checking, high-precision fault diagnosis, electric power digital network application in, increasingly expose limitation.
Fibre optical sensor is insulated strong with its high sensitivity and precision, intrinsic safety, anti-electromagnetic field interference, height
Degree and high temperature resistant, corrosion-resistant, light, flexible broadband, collection sensing and it is transmitted in one, it can be compatible with digital communication system
Etc. prominent characteristics, in machinery, electronic instrument, space flight and aviation, petroleum, chemical industry, biologic medical, and environmental protection, electric power, smelting
Gold, communications and transportation, light textile, food etc., the production process automatic control of each department of national economy, on-line checking, fault diagnosis and
Security alarm etc. has a wide range of applications.
Summary of the invention
The object of the present invention is to provide heavy-current measuring devices in a kind of ultra-high-tension power transmission line, come by the following technical programs
It realizes:
The hardware circuit of the measuring device is by current measurement probe part, photoelectric conversion circuit, fibre transmission portions, demodulator circuit
With the most of composition of SCM system 5.As shown in Figure 1, using conventional current mutual inductor, system works general system proposal
When, the low current that 0~5A is converted to from current transformer, which is become light pulse through light pushing unit, makes LED shine, and passes through optical fiber
Transmission through electrooptical device PD is transformed into electric signal, and light pulse is reduced into pulse width by triggered device again, in this way containing being tested
The signal of amount information can be sent to SCM system and be handled, and realize the functions such as display, printing, alarm.
The probe is active circuitry, is powered in conjunction with battery by silicon solar cell, when having sunlight, too by silicon
Positive electricity pond powers to the load, while charging to battery, when no sunlight, is powered to the load by battery.
The current sensor probe structure is simple, is wound on frame with conducting wire, and sensor uses 2 identical lines
Circle, 1 coil are used as measuring coil, and one is used as differential compensation coil, differential compensation structure are constituted, so that 2 wire loops
Temperature drift cancelled out each other using timely drift as common-mode signal.
The SCM system uses 8031 single-chip microcontrollers, and keyboard, display use 8279 chips.
Detailed description of the invention
Fig. 1 is heavy-current measuring device overall plan schematic diagram in the ultra-high-tension power transmission line.
Fig. 2 is that described device signal reconciles circuit diagram.
Fig. 3 is described device SCM system entire block diagram.
Fig. 4 is described device signal processing software flow chart.
Specific embodiment
The present invention provides heavy-current measuring devices in a kind of ultra-high-tension power transmission line, with reference to the accompanying drawing and specific embodiment party
The present invention will be further described for formula.
Fig. 1 is that heavy-current measuring device overall plan schematic diagram in the ultra-high-tension power transmission line will be by electricity when system works
The low current that current transformer is converted to 0~5A, which becomes light pulse through light pushing unit, makes LED shine, and is transmitted by optical fiber through photoelectricity
Switching device PD is transformed into electric signal, and light pulse is reduced into pulse width by triggered device again, in this way containing the letter for being measured information
Number can be sent to SCM system is handled, and realizes the functions such as display, printing, alarm.
The probe is active circuitry, is powered in conjunction with battery by silicon solar cell, when having sunlight, too by silicon
Positive electricity pond powers to the load, while charging to battery, when no sunlight, is powered to the load by battery.
Eddy current sensor sonde configuration is simple, is wound on frame with conducting wire.In order to improve the temperature of eddy current sensor
Stability, reduces temperature drift, and sensor uses 2 identical coils.1 coil is used as measuring coil, and one is used as differential benefit
Coil is repaid, differential compensation structure is constituted, so that the temperature drift of 2 wire loops is cancelled out each other using timely drift as common-mode signal, from
And improve the rejection ability to temperature drift.
The unipolarity for being converted into pulsation by rectification circuit to the electric current of the 0~5A obtained from 2 sides of current transformer is straight
Flow voltage signal.The unipolarity d. c. voltage signal of this pulsation had both contained direct current, first harmonic and high humorous subwave composition, also
Some interference signals cannot be supplied directly to subsequent conditioning circuit, need to extract wherein smooth direct current signal by filter circuit
Out.
In voltage-pulsewidth translation circuit, using " empty short " characteristic of amplifier, measured signal is converted into current signal,
The current signal modulation of a upper link at pulse width signal.
Pulse width signal is modulated into arteries and veins position signal.It is positive and negative side respectively that this effect, which is by the way that pulse width signal is sent to 2,
Along the monostable D4047 of triggering, the position at the positive and negative edge of pulse width signal is recorded, is achieved that from pulsewidth to pulse position
Modulation.Being sent in CD4047 or door from 2 pulse position signals that pulsewidth modulation obtains, to drive LED to shine, reform into
Light pulse, then light pulse is coupled in optical fiber is transmitted.
As shown in Fig. 2, the light pulse signal that optical fiber transmits is passed through photo-electric conversion element (photodiode PD) again, by light
Signal is converted into electric signal.Light pulse signal is restored using the demodulator circuit being made of LF412 and double D trigger CD4013
At pulse width signal, SCM system can be sent to containing the signal for being measured information in this way and is handled and is realized aobvious
The functions such as show, print, alarming.
After pulse width signal recovers, it is sent to 8031 end p34, as shown in figure 3, utilizing T0 pairs of its internal counter
Input pulse is counted.Then carry out realization show, printing, the functions such as alarm, signal processing software flow chart such as Fig. 4 institute
Show.
Claims (4)
1. heavy-current measuring device in a kind of ultra-high-tension power transmission line, it is characterised in that: device is made using conventional current mutual inductor
For probe, tested current signal is converted into low current signal, by a special micro energy lose modulation circuit tested electric current
Signal is converted to the light pulse signal of pulsewidth, pulse-position modulation, then the measured signal of modulation is transferred to instrument control by optical fiber
End is handled；Its hardware circuit by current measurement probe part, photoelectric conversion circuit, fibre transmission portions, demodulator circuit and
The most of composition of SCM system 5；When system works, the low current that 0~5A is converted to by current transformer is pushed into list through light
Member, which becomes light pulse, makes LED shine, by optical fiber transmission through electrooptical device PD be transformed into electric signal again triggered device by light
Pulse is reduced into pulse width, handles SCM system is sent to containing the signal for being measured information, realizes display, beats
The functions such as print, alarm.
2. heavy-current measuring device in a kind of ultra-high-tension power transmission line according to claim 1, it is characterised in that: the probe
It is active circuitry, is powered in conjunction with battery by silicon solar cell, when having sunlight, is supplied from silicon solar cell to load
Electricity, while charging to battery, when no sunlight, powered to the load by battery.
3. heavy-current measuring device in a kind of ultra-high-tension power transmission line according to claim 1, it is characterised in that: the electric current
Sensor probe configuration is simple, is wound on frame with conducting wire, and sensor uses 2 identical coils, and 1 coil is used as measurement
Coil, one be used as differential compensation coil, constitute differential compensation structure so that the temperature drift of 2 wire loops using float in time as
Common-mode signal is cancelled out each other.
4. heavy-current measuring device in a kind of ultra-high-tension power transmission line according to claim 1, it is characterised in that: the monolithic
Machine system uses 8031 single-chip microcontrollers, and keyboard, display use 8279 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811478254.9A CN109342796A (en) | 2018-12-04 | 2018-12-04 | Heavy-current measuring device in a kind of ultra-high-tension power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811478254.9A CN109342796A (en) | 2018-12-04 | 2018-12-04 | Heavy-current measuring device in a kind of ultra-high-tension power transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109342796A true CN109342796A (en) | 2019-02-15 |
Family
ID=65319723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811478254.9A Pending CN109342796A (en) | 2018-12-04 | 2018-12-04 | Heavy-current measuring device in a kind of ultra-high-tension power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109342796A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550226A (en) * | 2020-05-20 | 2020-08-18 | 中国矿业大学 | Deep well electric pulse fracturing device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2432008A (en) * | 2005-11-07 | 2007-05-09 | Omnicharge Ltd | Current sensor |
| CN101320059A (en) * | 2008-07-23 | 2008-12-10 | 董震 | Device and method for high voltage current measurement |
| CN103499735A (en) * | 2013-07-02 | 2014-01-08 | 华北电力大学 | Device for collecting high-potential corona current |
| CN104330614A (en) * | 2014-10-28 | 2015-02-04 | 国网辽宁省电力有限公司朝阳供电公司 | Large current detecting device applied to high-voltage transmission line |
| CN104569566A (en) * | 2014-12-29 | 2015-04-29 | 国家电网公司 | Measurement device of leaked current at high-voltage end of insulator |
| CN104991105A (en) * | 2015-07-14 | 2015-10-21 | 国家电网公司 | Remote-energy-supply high-voltage line current sensing detection system based on optical fiber |
-
2018
- 2018-12-04 CN CN201811478254.9A patent/CN109342796A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2432008A (en) * | 2005-11-07 | 2007-05-09 | Omnicharge Ltd | Current sensor |
| CN101320059A (en) * | 2008-07-23 | 2008-12-10 | 董震 | Device and method for high voltage current measurement |
| CN103499735A (en) * | 2013-07-02 | 2014-01-08 | 华北电力大学 | Device for collecting high-potential corona current |
| CN104330614A (en) * | 2014-10-28 | 2015-02-04 | 国网辽宁省电力有限公司朝阳供电公司 | Large current detecting device applied to high-voltage transmission line |
| CN104569566A (en) * | 2014-12-29 | 2015-04-29 | 国家电网公司 | Measurement device of leaked current at high-voltage end of insulator |
| CN104991105A (en) * | 2015-07-14 | 2015-10-21 | 国家电网公司 | Remote-energy-supply high-voltage line current sensing detection system based on optical fiber |
Non-Patent Citations (1)
| Title |
|---|
| 曲昀卿: "高压输电线路中大电流测量装置的设计", 《煤炭技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550226A (en) * | 2020-05-20 | 2020-08-18 | 中国矿业大学 | Deep well electric pulse fracturing device |
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Application publication date: 20190215 |
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