CN103792404A - Optical current transformer - Google Patents
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- CN103792404A CN103792404A CN201410055347.6A CN201410055347A CN103792404A CN 103792404 A CN103792404 A CN 103792404A CN 201410055347 A CN201410055347 A CN 201410055347A CN 103792404 A CN103792404 A CN 103792404A
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Abstract
The invention relates to an optical current transformer, and relates to a current transformer. The optical current transformer solves the problems that an existing optical current transformer is not high in test precision, poor in temperature stability and poor in long-term operation reliability. The optical current transformer and aself-healing corrector are arranged on a power transmission bus; the data signal output end of the optical current transformer and the data signal output end of the self-healing corrector are connected with a digital signal demodulation module of an algorithm achievement unit and a data signal input end of a power frequency filter module respectively; the signal output end of the digital signal demodulation module is respectively connected with the signal input end of the power frequency filter module and the signal input end of a coefficient correcting module; the data signal input end and the data signal output end of a fault judgment module are connected with the data signal output end of the power frequency filter module and the data signal input end of the coefficient correcting module respectively. The optical current transformer has the advantages of being high in measurement precision, good in temperature stability and high in long-term operation reliability.
Description
Technical field
The present invention relates to a kind of optical current mutual inductor.
Background technology
Modern power systems need to be measured accurately, the current transformer of insulation safety and numeral output.Traditional electromagnetic current transducer is owing to there being the problem that magnetic circuit is saturated, and transient measuring precision can not fine satisfied protection control and the dynamically requirement of observation; Insulation safety is undesirable, and insulation safety fault happens occasionally; The problems such as analog output, can not meet the needs that digital power system is built.Along with the development of modern optical fiber technology, electronic technology, electronic current mutual inductor replaces traditional electromagnetic current transducer has become the inexorable trend of development.
At present, electronic current mutual inductor mainly contains two kinds: air core coil electronic current mutual inductor and optical current mutual inductor.Air core coil electronic current mutual inductor is with air core coil as sensing coil, and high voltage bus electric current is sensed as suitable electric current by sensing coil, becomes voltage signal through sample resistance module converts, realizes the measurement to high voltage bus electric current.Air core coil is owing to not being with iron core, be subject to outside electromagnetic interference, simultaneously coiling shape and the technological requirement of its coil are very high, and the also impact of the bad border factor such as hand temperature to a certain extent of coil rack, temperature stability is poor, makes its measuring accuracy can not reach very high; And because its high-side signal treatment circuit needs power supply reliably and with long-term, power supply design and low-power consumption are difficult point and the gordian techniquies of the air core coil electronic current mutual inductor research of prior art.In existing high-voltage power supply technology, mainly contain two kinds of laser energy supply and floated power supplys.Laser energy supply, the life-span that has determined high power laser due to the characteristic of semiconductor material generally only about several years, far can not meet the requirement of power system measuring to mutual inductor operation steady in a long-term.Floated power supply, because high voltage bus electric current exists work dead band when too small, in the time that Short-Circuit High Current appears in high voltage bus, need to design specialized circuitry and absorb unnecessary energy, and floated Power supply reliability is reduced.Power supply unstable, will affect the measuring accuracy of current transformer greatly.
Summary of the invention
In view of the above-mentioned problems in the prior art, the object of the invention is to address the deficiencies of the prior art, the optical current mutual inductor that a kind of measuring accuracy is high, temperature stability good and long-time running reliability is high is provided.
The invention provides a kind of optical current mutual inductor, comprising:
Algorithm is realized unit, described algorithm is realized unit and is comprised digital signal conciliation module, power frequency filtration module, fault judge module and coefficient correction module, the first signal output terminal of digital demodulation signal module is connected with the secondary signal input end of power frequency filtration module, the secondary signal output terminal of digital demodulation signal module is connected with the first signal input end of coefficient correction module, the data-signal output terminal of power frequency filtration module is connected with the data-signal input end of fault judge module, the data-signal output terminal of fault judge module is connected with the second data-signal input end of coefficient correction module, the data-signal output terminal of coefficient correction module is connected with the signal input part of secondary power equipment, the data-signal output terminal of coefficient correction module is the data-signal output terminal of optical current mutual inductor,
Optical current sensor, described optical current sensor is arranged on electric power transmission bus, the data-signal input end that data-signal output terminal and the algorithm of optical current sensor realized digital demodulation signal module in unit is connected, described optical current sensor is by optical current sensing unit, light source, photoelectric detector and analog signal processing circuit composition, the beam projecting end of described light source is connected with the light incident end of optical current sensing unit, the signal output part of optical current sensing unit is connected with the signal input part of photoelectric detector, the data-signal output terminal of photoelectric detector is connected with the data-signal input end of analog signal processing circuit, the data-signal output terminal of analog signal processing circuit is the data-signal output terminal of optical current sensor, the data-signal output terminal of described light current transformer is the data-signal output terminal of coefficient correction module, and
Corrector, described corrector is arranged on electric power transmission bus, described corrector comprises underloading coil module, sample resistance module, high-voltage suppling power module, high-pressure side circuit and lower-voltage circuit, high-pressure side circuit is by overvoltage crowbar, biasing circuit, frequency modulation circuit and high pressure electricity change-over circuit composition, lower-voltage circuit is made up of low pressure electro-optical conversion circuit and signal demodulating circuit, the signal input part of underloading coil module is the signal input part of corrector, the signal output part of underloading coil module is connected with the signal input part of sample resistance module, the signal output part of sample resistance module is connected with the signal input part of the overvoltage crowbar in the circuit of high-pressure side, the signal output part of overvoltage crowbar is connected with the signal input part of biasing circuit, the signal output part of biasing circuit is connected with the signal input part of frequency modulation circuit, the signal output part of frequency modulation circuit is connected with the signal input part of high pressure electro-optical conversion circuit, the signal output part of high pressure electro-optical conversion circuit is the signal output part of high-pressure side circuit, the signal output part of high pressure electro-optical conversion circuit is connected with the signal input part of the low pressure electro-optical conversion circuit in lower-voltage circuit, the signal output part of low pressure electro-optical conversion circuit is connected with the signal input part that signal is reconciled circuit, the signal output part of signal demodulating circuit is the data-signal output terminal of corrector, four power supply output terminals of high voltage supply current module simultaneously with high-pressure side circuit in the power supply input end of overvoltage crowbar, the power supply input end of biasing circuit, the power supply input end of frequency modulation circuit is connected with the power supply input end of high pressure electro-optical conversion circuit, data-signal output terminal and the algorithm of described corrector realized the first data-signal input end of power frequency filtration module in unit and is connected.
Further, described optical current sensing unit is made up of two identical sensing units of structure, two identical sensing units of structure are relatively arranged on the both sides of electric power transmission bus, described sensing unit is by two optical fiber collimators, the polarizer, vertical bar shaped magneto-optic glass and analyzer composition, first optical fiber collimator is installed on a side end face of the polarizer, the opposite side end face of the polarizer is connected with a side end face of vertical bar shaped magneto-optic glass, the opposite side end face of vertical bar shaped magneto-optic glass is connected with a side end face of analyzer, second optical fiber collimator is installed on a side end face of analyzer, the 3rd optical fiber collimator is installed on another side of analyzer, the central optical axis of described first optical fiber collimator, the central optical axis of the polarizer, the central optical axis of the central optical axis of vertical bar shaped magneto-optic glass and second optical fiber collimator is positioned on same axis.
Further, described optical current sensing unit is made up of a ring concentrator and a sensing unit, described sensing unit is by three optical fiber collimators, the polarizer, vertical bar shaped magneto-optic glass and analyzer composition, first optical fiber collimator is installed on a side end face of the polarizer, the opposite side end face of the polarizer is connected with a side end face of vertical bar shaped magneto-optic glass, the opposite side end face of vertical bar shaped magneto-optic glass is connected with a side end face of analyzer, second optical fiber collimator is installed on a side end face of analyzer, the 3rd optical fiber collimator is installed on another side of analyzer, the central optical axis of described first optical fiber collimator, the central optical axis of the polarizer, the central optical axis of the central optical axis of vertical bar shaped magneto-optic glass and second optical fiber collimator is positioned on same axis, described ring concentrator is the annulus with a fracture, electric power transmission bus is placed on the circle centre position of ring concentrator, described sensing unit is placed in the port of ring concentrator, and the axial direction of sensing unit is identical with the tangential direction of ring concentrator.
Further, the sensing unit of described optical current sensing unit is by three optical fiber collimators, the polarizer, block glass shape magneto-optic glass and analyzer composition, electric power transmission bus is placed on the central axis place of block glass shape magneto-optic glass, first optical fiber collimator is installed on a side end face of the polarizer, the opposite side end face of the polarizer is connected with a side end face of block glass shape magneto-optic glass, the opposite side end face of block glass box magneto-optic glass is connected with a side end face of analyzer, second optical fiber collimator is installed on a side end face of analyzer, the 3rd optical fiber collimator is installed on another side of analyzer, the central optical axis of described first optical fiber collimator, the central optical axis of the polarizer, the central optical axis of the central optical axis of vertical bar shaped magneto-optic glass and the second optical fiber collimator is mutually vertical.
Further, described analog signal processing circuit is by reference voltage module, the first differential amplifier circuit, anti-aliasing low-pass filter circuit, block isolating circuit and the second amplifying circuit composition, the first data-signal input end of the first differential amplifier circuit is the data-signal input end of analog signal processing circuit, the secondary signal input end of the first differential amplifier circuit is connected with the signal output part of reference voltage module, the data-signal output terminal of the first differential amplifier circuit is connected with the first data-signal input end of anti-aliasing low-pass filter circuit and the data-signal input end of block isolating circuit simultaneously, the data-signal output terminal of block isolating circuit is connected with the data-signal input end of the second amplifying circuit, the data-signal output terminal of the second amplifying circuit is connected with the second data-signal input end of anti-aliasing low-pass filter circuit, the data-signal output terminal of described anti-aliasing low-pass filter circuit is the data-signal output terminal of analog signal processing circuit.
The advantage that the present invention has and beneficial effect are: described optical current mutual inductor has advantages of that measuring accuracy is high, temperature stability good and reliability is high; Meanwhile, it adopts corrector, and application self-healing alignment technique has been eliminated optical current mutual inductor accuracy of measurement and be subject to the impact of the extraneous factor such as environment temperature and vibration completely; Employing discontinuity is proofreaied and correct, and makes high side voltage in discontinuous power supply state, has greatly improved Power supply reliability and life-span; The optical current sensor that adopts passive structures, does not exist due to high-pressure side dead electricity, and output error message causes the situation of protection misoperation.
Accompanying drawing explanation
Fig. 1 is the modular structure schematic diagram of the present embodiment;
Fig. 2 is the modular structure schematic diagram of optical current mutual inductor 2;
Fig. 3 is the structural representation that optical current sensing unit 2-1 adopts vertical bar shaped magneto-optic glass formula;
Fig. 4 is the structural representation that optical current sensing unit 2-1 adopts ring concentrator formula;
Fig. 5 is the structural representation that light glass type optical current sensing unit 2-1 adopts block glass shape magnetic;
Fig. 6 is the modular structure schematic diagram of analog signal processing circuit 2-4;
Fig. 7 is the modular structure schematic diagram of rectifier 3.
Embodiment
The present invention is further illustrated with specific embodiment below with reference to accompanying drawings.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7: a kind of optical current mutual inductor of the embodiment of the present invention, comprising:
Algorithm is realized unit 4, described algorithm is realized unit 4 and is comprised digital signal conciliation module 41, power frequency filtration module 42, fault judge module 43 and coefficient correction module 44, the first signal output terminal of digital demodulation signal module 41 is connected with the secondary signal input end of power frequency filtration module 42, the secondary signal output terminal of digital demodulation signal module 41 is connected with the first signal input end of coefficient correction module 44, the data-signal output terminal of power frequency filtration module 42 is connected with the data-signal input end of fault judge module 43, the data-signal output terminal of fault judge module 43 is connected with the second data-signal input end of coefficient correction module 44, the data-signal output terminal of coefficient correction module 44 is connected with the signal input part of secondary power equipment, the data-signal output terminal of coefficient correction module 44 is the data-signal output terminal of optical current mutual inductor,
Optical current sensor 2, described optical current sensor 2 is arranged on electric power transmission bus, the data-signal input end that data-signal output terminal and the algorithm of optical current sensor 2 realized digital demodulation signal module 41 in unit 4 is connected, described optical current sensor 2 is by optical current sensing unit 21, light source 22, photoelectric detector 23 and analog signal processing circuit 24 form, the beam projecting end of described light source 22 is connected with the light incident end of optical current sensing unit 21, the signal output part of optical current sensing unit 21 is connected with the signal input part of photoelectric detector 23, the data-signal output terminal of photoelectric detector 23 is connected with the data-signal input end of analog signal processing circuit 24, the data-signal output terminal of analog signal processing circuit 24 is the data-signal output terminal of optical current sensor 2, the data-signal output terminal of described light current transformer is the data-signal output terminal of coefficient correction module, and
As the preferred implementation of above-described embodiment, described optical current sensing unit 21 is made up of two identical sensing units of structure, two identical sensing units of structure are relatively arranged on the both sides of electric power transmission bus, described sensing unit is by three optical fiber collimators 211, the polarizer 212, vertical bar shaped magneto-optic glass 213 and analyzer 214 form, first optical fiber collimator 211 is installed on a side end face of the polarizer 212, the opposite side end face of the polarizer 212 is connected with a side end face of vertical bar shaped magneto-optic glass 213, the opposite side end face of vertical bar shaped magneto-optic glass 213 is connected with a side end face of analyzer 214, second optical fiber collimator 211 is installed on a side end face of analyzer 214, the 3rd optical fiber collimator 211 is installed on another side of analyzer 214, the central optical axis of described first optical fiber collimator 211, the central optical axis of the polarizer 212, the central optical axis of the central optical axis of vertical bar shaped magneto-optic glass 213 and second optical fiber collimator 211 is positioned on same axis.
As the preferred implementation of above-described embodiment, described optical current sensing unit 21 is made up of a ring concentrator 215 and a sensing unit, described sensing unit is by three optical fiber collimators 211, the polarizer 212, vertical bar shaped magneto-optic glass 213 and analyzer 214 form, first optical fiber collimator 211 is installed on a side end face of the polarizer 212, the opposite side end face of the polarizer 212 is connected with a side end face of vertical bar shaped magneto-optic glass 213, the opposite side end face of vertical bar shaped magneto-optic glass 213 is connected with a side end face of analyzer 214, second optical fiber collimator 211 is installed on a side end face of analyzer 214, the 3rd optical fiber collimator 211 is installed on another side of analyzer 214, the central optical axis of described first optical fiber collimator 211, the central optical axis of the polarizer 212, the central optical axis of the central optical axis of vertical bar shaped magneto-optic glass 213 and second optical fiber collimator 211 is positioned on same axis, described ring concentrator 215 is the annulus with a fracture, electric power transmission bus 1 is placed on the circle centre position of ring concentrator 215, described sensing unit is placed in the port of ring concentrator 215, and the axial direction of sensing unit is identical with the tangential direction of ring concentrator 215.
As the preferred implementation of above-described embodiment, the sensing unit 21 of described optical current sensing unit is by three optical fiber collimators 211, the polarizer 214, block glass shape magneto-optic glass 216 and analyzer 214 form, electric power transmission bus 1 is placed on the central axis place of block glass shape magneto-optic glass 216, first optical fiber collimator 211 is installed on a side end face of the polarizer 212, the opposite side end face of the polarizer 212 is connected with a side end face of block glass shape magneto-optic glass 216, the opposite side end face of block glass box magneto-optic glass 216 is connected with a side end face of analyzer 214, second optical fiber collimator 211 is installed on a side end face of analyzer 212, the 3rd optical fiber collimator 211 is installed on another side of analyzer 214, the central optical axis of described first optical fiber collimator 211, the central optical axis of the polarizer 212, the central optical axis of the central optical axis of vertical bar shaped magneto-optic glass 213 and the second optical fiber collimator 211 is mutually vertical.
As the preferred implementation of above-described embodiment, described analog signal processing circuit 24 is by reference voltage module 241, the first differential amplifier circuit 242, anti-aliasing low-pass filter circuit 243, block isolating circuit 244 and the second amplifying circuit 245 form, the first data-signal input end of the first differential amplifier circuit 242 is the data-signal input end of analog signal processing circuit 24, the secondary signal input end of the first differential amplifier circuit 242 is connected with the signal output part of reference voltage module 241, the data-signal output terminal of the first differential amplifier circuit 242 is connected with the first data-signal input end of anti-aliasing low-pass filter circuit 243 and the data-signal input end of block isolating circuit 244 simultaneously, the data-signal output terminal of block isolating circuit 244 is connected with the data-signal input end of the second amplifying circuit 245, the data-signal output terminal of the second amplifying circuit 245 is connected with the second data-signal input end of anti-aliasing low-pass filter circuit 243, the data-signal output terminal of described anti-aliasing low-pass filter circuit 243 is the data-signal output terminal of analog signal processing circuit 24.
Finally it should be noted that: above-described each embodiment, only for technical scheme of the present invention is described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record previous embodiment is modified, or to wherein partly or entirely technical characterictic be equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (5)
1. an optical current mutual inductor, is characterized in that, comprising:
Algorithm is realized unit, described algorithm is realized unit and is comprised digital signal conciliation module, power frequency filtration module, fault judge module and coefficient correction module, the first signal output terminal of digital demodulation signal module is connected with the secondary signal input end of power frequency filtration module, the secondary signal output terminal of digital demodulation signal module is connected with the first signal input end of coefficient correction module, the data-signal output terminal of power frequency filtration module is connected with the data-signal input end of fault judge module, the data-signal output terminal of fault judge module is connected with the second data-signal input end of coefficient correction module, the data-signal output terminal of coefficient correction module is connected with the signal input part of secondary power equipment, the data-signal output terminal of coefficient correction module is the data-signal output terminal of optical current mutual inductor,
Optical current sensor, described optical current sensor is arranged on electric power transmission bus, the data-signal input end that data-signal output terminal and the algorithm of optical current sensor realized digital demodulation signal module in unit is connected, described optical current sensor is by optical current sensing unit, light source, photoelectric detector and analog signal processing circuit composition, the beam projecting end of described light source is connected with the light incident end of optical current sensing unit, the signal output part of optical current sensing unit is connected with the signal input part of photoelectric detector, the data-signal output terminal of photoelectric detector is connected with the data-signal input end of analog signal processing circuit, the data-signal output terminal of analog signal processing circuit is the data-signal output terminal of optical current sensor, the data-signal output terminal of described light current transformer is the data-signal output terminal of coefficient correction module, and
Corrector, described corrector is arranged on electric power transmission bus, described corrector comprises underloading coil module, sample resistance module, high-voltage suppling power module, high-pressure side circuit and lower-voltage circuit, high-pressure side circuit is by overvoltage crowbar, biasing circuit, frequency modulation circuit and high pressure electricity change-over circuit composition, lower-voltage circuit is made up of low pressure electro-optical conversion circuit and signal demodulating circuit, the signal input part of underloading coil module is the signal input part of corrector, the signal output part of underloading coil module is connected with the signal input part of sample resistance module, the signal output part of sample resistance module is connected with the signal input part of the overvoltage crowbar in the circuit of high-pressure side, the signal output part of overvoltage crowbar is connected with the signal input part of biasing circuit, the signal output part of biasing circuit is connected with the signal input part of frequency modulation circuit, the signal output part of frequency modulation circuit is connected with the signal input part of high pressure electro-optical conversion circuit, the signal output part of high pressure electro-optical conversion circuit is the signal output part of high-pressure side circuit, the signal output part of high pressure electro-optical conversion circuit is connected with the signal input part of the low pressure electro-optical conversion circuit in lower-voltage circuit, the signal output part of low pressure electro-optical conversion circuit is connected with the signal input part that signal is reconciled circuit, the signal output part of signal demodulating circuit be corrector data-signal output terminal, four power supply output terminals of high voltage supply current module simultaneously with high-pressure side circuit in the power supply input end of overvoltage crowbar, the power supply input end of biasing circuit, the power supply input end of frequency modulation circuit is connected with the power supply input end of high pressure electro-optical conversion circuit, data-signal output terminal and the algorithm of described corrector realized the first data-signal input end of power frequency filtration module in unit and is connected.
2. optical current mutual inductor according to claim 1, it is characterized in that, described optical current sensing unit is made up of two identical sensing units of structure, two identical sensing units of structure are relatively arranged on the both sides of electric power transmission bus, described sensing unit is by two optical fiber collimators, the polarizer, vertical bar shaped magneto-optic glass and analyzer composition, first optical fiber collimator is installed on a side end face of the polarizer, the opposite side end face of the polarizer is connected with a side end face of vertical bar shaped magneto-optic glass, the opposite side end face of vertical bar shaped magneto-optic glass is connected with a side end face of analyzer, second optical fiber collimator is installed on a side end face of analyzer, the 3rd optical fiber collimator is installed on another side of analyzer, the central optical axis of described first optical fiber collimator, the central optical axis of the polarizer, the central optical axis of the central optical axis of vertical bar shaped magneto-optic glass and second optical fiber collimator is positioned on same axis.
3. optical current mutual inductor according to claim 1, it is characterized in that, described optical current sensing unit is made up of a ring concentrator and a sensing unit, described sensing unit is by three optical fiber collimators, the polarizer, vertical bar shaped magneto-optic glass and analyzer composition, first optical fiber collimator is installed on a side end face of the polarizer, the opposite side end face of the polarizer is connected with a side end face of vertical bar shaped magneto-optic glass, the opposite side end face of vertical bar shaped magneto-optic glass is connected with a side end face of analyzer, second optical fiber collimator is installed on a side end face of analyzer, the 3rd optical fiber collimator is installed on another side of analyzer, the central optical axis of described first optical fiber collimator, the central optical axis of the polarizer, the central optical axis of the central optical axis of vertical bar shaped magneto-optic glass and second optical fiber collimator is positioned on same axis, described ring concentrator is the annulus with a fracture, electric power transmission bus is placed on the circle centre position of ring concentrator, described sensing unit is placed in the port of ring concentrator, and the axial direction of sensing unit is identical with the tangential direction of ring concentrator.
4. optical current mutual inductor according to claim 1, it is characterized in that, the sensing unit of described optical current sensing unit is by three optical fiber collimators, the polarizer, block glass shape magneto-optic glass and analyzer composition, electric power transmission bus is placed on the central axis place of block glass shape magneto-optic glass, first optical fiber collimator is installed on a side end face of the polarizer, the opposite side end face of the polarizer is connected with a side end face of block glass shape magneto-optic glass, the opposite side end face of block glass box magneto-optic glass is connected with a side end face of analyzer, second optical fiber collimator is installed on a side end face of analyzer, the 3rd optical fiber collimator is installed on another side of analyzer, the central optical axis of described first optical fiber collimator, the central optical axis of the polarizer, the central optical axis of the central optical axis of vertical bar shaped magneto-optic glass and the second optical fiber collimator is mutually vertical.
5. optical current mutual inductor according to claim 1, it is characterized in that, described analog signal processing circuit is by reference voltage module, the first differential amplifier circuit, anti-aliasing low-pass filter circuit, block isolating circuit and the second amplifying circuit composition, the first data-signal input end of the first differential amplifier circuit is the data-signal input end of analog signal processing circuit, the secondary signal input end of the first differential amplifier circuit is connected with the signal output part of reference voltage module, the data-signal output terminal of the first differential amplifier circuit is connected with the first data-signal input end of anti-aliasing low-pass filter circuit and the data-signal input end of block isolating circuit simultaneously, the data-signal output terminal of block isolating circuit is connected with the data-signal input end of the second amplifying circuit, the data-signal output terminal of the second amplifying circuit is connected with the second data-signal input end of anti-aliasing low-pass filter circuit, the data-signal output terminal of described anti-aliasing low-pass filter circuit is the data-signal output terminal of analog signal processing circuit.
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| CN201410055347.6A CN103792404A (en) | 2014-02-19 | 2014-02-19 | Optical current transformer |
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| CN201410055347.6A CN103792404A (en) | 2014-02-19 | 2014-02-19 | Optical current transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104267239A (en) * | 2014-10-11 | 2015-01-07 | 东南大学 | Current transformer for multipath bus current detection and current detection method thereof |
| CN104267239B (en) * | 2014-10-11 | 2017-01-04 | 东南大学 | Current transformer and electric current detecting method thereof for the detection of multichannel bus current |
| CN106373380A (en) * | 2016-08-17 | 2017-02-01 | 山东理工大学 | Electronic current transformer signal linear transmission device and method |
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| CN202033400U (en) * | 2011-04-13 | 2011-11-09 | 华北电力大学 | Modulation-type optical current transformer |
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| DE10154309A1 (en) * | 2001-11-05 | 2003-05-15 | Abb Research Ltd | Device for electro-optical measurement of high voltage has a high-voltage (HV) part, an electro-optical voltage transformer to convert HV in the HV part into an optical signal, an optical detector and a scanning circuit. |
| CN101692400A (en) * | 2009-09-11 | 2010-04-07 | 哈尔滨工业大学 | Self-healing optical current transducer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104267239A (en) * | 2014-10-11 | 2015-01-07 | 东南大学 | Current transformer for multipath bus current detection and current detection method thereof |
| CN104267239B (en) * | 2014-10-11 | 2017-01-04 | 东南大学 | Current transformer and electric current detecting method thereof for the detection of multichannel bus current |
| CN106373380A (en) * | 2016-08-17 | 2017-02-01 | 山东理工大学 | Electronic current transformer signal linear transmission device and method |
| CN106373380B (en) * | 2016-08-17 | 2019-06-14 | 山东理工大学 | A kind of linear transfer method of electronic current mutual inductor signal |
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Application publication date: 20140514 |