CN100587865C - Active optics current transformer and operation method for electriferous working thereof - Google Patents
Active optics current transformer and operation method for electriferous working thereof Download PDFInfo
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- CN100587865C CN100587865C CN200510086369A CN200510086369A CN100587865C CN 100587865 C CN100587865 C CN 100587865C CN 200510086369 A CN200510086369 A CN 200510086369A CN 200510086369 A CN200510086369 A CN 200510086369A CN 100587865 C CN100587865 C CN 100587865C
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Abstract
This invention discloses one source chemical current inductor, which comprises high voltage side signal process circuit 4, high voltage current source 9, high voltage current power 15 and coupler capacitor with non-metal cable 20 and low side signal process circuit 25, wherein, the circuit 4 adopts main and assistant power; the capacitor supply forms main power 9 and laser supply forms assistant power 15 at cooling status under control of side micro process system 24 output level.
Description
Technical field
The present invention relates to the current transformer technical field, especially a kind of active optics current transformer and method thereof that is used for the measurement of electric power system high-voltage great-current.
Background technology
The continuous growth of electric power transfer capacity, the improving constantly of electric pressure makes insulation difficulty that traditional electromagnetic current transducer exists, complex structure, defectives such as requirement bulky, that be difficult to satisfy electric power digitalization more and more obvious.Along with modern optical fiber technology, development of electronic technology, optical current mutual inductor has caused the increasing concern of global researchers, makes it become the ideal substitute of traditional electromagnetic current transducer.Whether need working power by on high-tension side current sensing head, at present the optical current mutual inductor that proposes generally is divided into two kinds of active formula and passive types.
The passive optical current transformer of prior art, the principle of general using Faraday magnetooptical effect, adopt the magneto-optic glass material into strips or block optical current sensing head, the deflection angle that the linearly polarized light of detection by the optical current sensing head caused by changes of magnetic field realizes the measurement to the high voltage bus electric current.Because the change of environmental factors such as temperature, magneto-optic glass can produce linear birefrigence, and the adhesive surface between the optics can produce displacement, makes the passive optical current transformer have temperature characterisitic, and these temperature characterisitics have the complexity that can't describe, may compensate with temperature hardly.Therefore, the restriction that is subjected to optical technology and optical material of the passive optical current transformer of prior art, its accuracy of measurement is not high, temperature stability is poor, can't reach the practicability requirement of operation steady in a long-term.
The active optics current transformer of prior art generally adopts air core coil (Rogowski coil) and underloading coil as sensor coil.Sensor coil is a suitable current with the high voltage bus induction by current, convert voltage signal to through sample resistance, convert light signal in the high-pressure side to by treatment circuit, be transmitted through the fiber to low-pressure side and carry out signal recovery and teletransmission, realize measurement the high voltage bus electric current.Air core coil is not owing to be with iron core, be subject to outside electromagnetic interference, the coiling shape and the technological requirement of its coil are very high simultaneously, and coil rack also is subjected to Effect of Environmental such as temperature to a certain extent, temperature stability is relatively poor, makes its certainty of measurement can not reach very high.The underloading coil is the electromagnetic type current coil that has little iron core, it has inherited the advantage that the anti-outside electromagnetic interference ability of traditional electromagnetic current transducer is strong, certainty of measurement is high, so measure occasion at the demanding high-voltage great-current of certainty of measurement, as sensor coil, become a kind of development trend with the underloading coil in conjunction with the active optics current transformer of optical fiber transmission technique.
At present, the existing polytype of active optics current transformer is studied personnel and proposes, and some has had business-like product, but this can not say something and has obtained solution.Such as, license notification number CN 2339994Y discloses a kind of active optics current transformer, and it is with current transformer, and promptly the underloading coil adopts the signal modulation system of voltage-frequency conversion to carry out signal sampling and transmission as sensor coil.But there is certain shortcoming in above-mentioned technology, one of its shortcoming: adopt synchronous voltage-frequency change-over circuit, the synchronised clock in the circuit adopts crystal oscillator; Though this oscillator is highly stable, it is a dissipative cell, needs the high-pressure side that jumbo power supply is arranged, and this requires the circuit of low power dissipation design for the high-pressure side is unpractical.Two of its shortcoming: floated power supply is adopted in the energy supply of high-side signal treatment circuit, adopts the supply current instrument transformer of the additional ironcore choke in the high-pressure side, utilizes induced current to be the high-pressure side circuit supply after conversion such as rectification, voltage stabilizing; Though circuit structure is simple, with low cost, power supply capacity is bigger, but there is the work dead band in it when the high voltage bus electric current is too small, when high voltage bus outlet Short-Circuit High Current, need the design specialized circuitry to absorb unnecessary energy, make floated power supply power supply reliability reduce.The instability of power supply power supply will influence the measuring accuracy of current transformer greatly.
The difficult point and the key technology of the active optics current transformer research that the power supply design of high-side signal treatment circuit and low power dissipation design are prior art.Adopt the power supply supply power mode of laser function in the existing high voltage source technology in addition, the high power laser that the laser energy supply utilizes low voltage side is emitted to luminous energy by optical fiber and is positioned on high-tension side photocell and converts electric energy to, it requires the power consumption of high-side signal treatment circuit low as far as possible, to improve the life-span and the reliability of LASER Light Source.The life-span that the characteristic of semi-conducting material has determined high power laser generally only about several years, far can not be satisfied the requirement of power system measuring to instrument transformer operation steady in a long-term.
For above-mentioned reasons, the active optics current transformer certainty of measurement of prior art is not high, and temperature stability is relatively poor, and fails really to solve the working power problem of high-pressure side circuit, makes instrument transformer continous-stable operation for a long time.
Summary of the invention
The object of the present invention is to provide that a kind of temperature stability is good, antijamming capability is strong, certainty of measurement is high, the simple active optics current measurement mechanism of insulation system.
Purpose of the present invention can realize by following technical measures: it comprises high-side signal treatment circuit 4, main high-voltage DC power supply 9, auxiliary high-voltage DC power supply 15, floating charge circuit 19, coupling capacitor 21 and low-side signal treatment circuit 25.Series connection electrifies and spreads the compact high precision electromagnetic current transducer 2 of sense effect on the tested current bus bar 1, is provided with in the secondary circuit and converts current signal to accurate sample resistance 3 that light current is pressed signal; The voltage signal input high-side signal treatment circuit 4 that sample resistance 3 obtains, it comprises overvoltage crowbar 5, biasing circuit 6, frequency modulation circuit 7 and electro-optical conversion circuit 8, is positioned on high-tension side same shielding box.Biasing circuit 6 changes ambipolar voltage signal into unipolar voltage signal, introduces main high-voltage DC power supply 9 output direct voltage state informations simultaneously; The output of biasing circuit 6 is connected with frequency modulation circuit 7, and frequency modulation circuit 7 is converted to frequency signal with voltage signal; The light-emitting diode that the frequency signal of frequency modulation circuit 7 outputs drives electro-optical conversion circuit 8 is converted to light pulse, and light signal sends to the photoelectric switching circuit 22 that is positioned at low-pressure side through optical fiber cable 20.Main high-voltage DC power supply 9 is a main power source, and auxiliary high-voltage DC power supply 15 is an accessory power supply, is in cold standby state, constitutes the supply power mode of primary and secondary power; The primary and secondary power input that inserts floating charge circuit 19 in parallel, the direct voltage of floating charge circuit 19 outputs are 4 power supplies of high-side signal treatment circuit; Light pulse signal sends to the signal processing circuit 25 that is positioned at low-pressure side through optical fiber cable 20; In the low-side signal treatment circuit 25, photoelectric switching circuit 22 will revert to the frequency signal with the proportional relation of tested electric current from the light pulse signal of optical fiber cable 20,23 pairs of frequency signals of signal demodulating circuit carry out demodulation, and the result who obtains sends into microprocessing systems and carries out computing, demonstration and output.
Main high-voltage DC power supply 9 adopts coupling capacitor to extract the design of electric energy.Utilization is parallel to stable low current that the coupling capacitor 21 of tested current bus bar 1 produces as current source, for transformer 10 provides stable electric current; Transformer 10 changes stable current source into stable voltage source, presses through follow-up direct current regulation circuit 14 output galvanic currents, for high-side signal treatment circuit 4 provides main working power.Auxiliary high-voltage DC power supply 15 is realized by the photocell assembly 16 of high power laser 17 and high conversion efficiency.Drive circuit 18 makes laser 17 export constant luminous power, and luminous power transfers to by optical fiber cable 20 and is positioned on high-tension side photocell assembly 16; Photocell assembly 16 receives the luminous power from the laser 17 that is positioned at low-pressure side, and converts luminous power to direct voltage, for high-side signal treatment circuit 4 provides the back work power supply.
The operating state of auxiliary high-voltage DC power supply 15 is controlled by the control level signal that microprocessing systems 24 sends.The signal that microprocessing systems 24 receives by monitoring is judged the operating state of the main high-voltage DC power supply 9 of main power supply, send the control level signal simultaneously, the control level signal that microprocessing systems 24 sends enters control circuit 35, control circuit 35 is made of optocoupler 33 and relay 34, the on off operating mode of the power supply of the drive circuit 18 of the state decision laser 17 of relay 34 contacts, thereby the operating state of the auxiliary high-voltage DC power supply 15 of control.
Active optics current transformer of the present invention compared with prior art has following feature and advantage:
1, current sensing signal adopts warbled mode, particularly selects the VFC integrated chip of low-power consumption, single power supply, has characteristics such as antijamming capability is strong, simple in structure, reliability height, can adapt to the abominable electromagnetic environment in high-pressure side well.
2, adopt coupling capacitor to extract the high voltage source design of electric energy.Utilization is parallel to stable low current that the coupling capacitor of a bus produces as current source, the output galvanic current is pressed after the transformation rectification, as main working power, for the high-side signal treatment circuit provides stable direct-current working volts, have that capacity is big, a good stability, high reliability features.
3, adopt the auxiliary power supply of the photocell assembly realization of high power laser and high conversion efficiency to the high-side signal treatment circuit.High power laser places the low-pressure side control room, photocell assembly is positioned in the on high-tension side shielding box, and the multimode fiber by routine carries out the optical power signals transmission between the two, has unified the fiber type of optical transmission, simplify the Optical Fiber Transmission structure, reduced the optical transmission cost; As accessory power supply, be in cold standby state for a long time, greatly reduce the running time of high power laser, thereby guaranteed that high power laser can satisfy current transformer service requirement steady in a long-term.
4, the high-side signal treatment circuit is taked the working method of dual power supply.The power supply that is extracted electric energy by coupling capacitor provides stable direct-current working volts as main working power for the high-side signal treatment circuit, as the back work power supply, is in cold standby state by the power supply of laser energy supply for a long time; When main working power is deactivated or was lost efficacy, the signal that microprocessing systems receives by monitoring is judged the operating state of main power source, send the control level signal simultaneously and start the back work power supply, promptly start the drive circuit of laser, make accessory power supply devote oneself to work by control circuit.The mode that extracts electric energy with coupling capacitor constitutes reliability and the life problems that main power source has solved the long-term stable operation that the laser energy supply brings, then solved the problem of the measurement discontinuity that mode that coupling capacitor extracts electric energy brings with the laser energy supply as accessory power supply, reduced performance requirement simultaneously high power laser.The present invention adopts the duplicate supply working method of primary and secondary power, has guaranteed the stability and the reliability of the continuous measurement of active optics current transformer, also has the ability of the operation conditions of monitoring coupling capacitor simultaneously concurrently.
5, for the design of coupling capacitor, adopt the form of filling dielectric in the composite hollow insulator chamber.In the central hollow epoxy rods that increases an axis through bore of the chamber of composite hollow insulator, chamber interior is filled dielectric; Optical signal communications between the high-low pressure adopts non-metallic optical fiber cables, and the gap between epoxy rods and the non-metallic optical fiber cables directly seals with the end of epoxy resin in epoxy rods, has simplified insulation system, has reduced the optical power loss of optical fiber.
Description of drawings
Fig. 1 is the schematic diagram of active optics current transformer of the present invention;
Fig. 2 is the schematic diagram of the high-side signal treatment circuit described in Fig. 1 of the present invention;
Fig. 3 is the schematic diagram of the high voltage source I described in Fig. 1 of the present invention;
Fig. 4 is the schematic diagram of the high voltage source II described in Fig. 1 of the present invention;
Fig. 5 is the schematic diagram of laser control circuit of the present invention;
Fig. 6 is the transverse cross-sectional view of the coupling capacitor described in Fig. 1 of the present invention;
Fig. 7 is the flow chart of active optics current transformer method start-up mode of the present invention;
Fig. 8 is the flow chart of active optics current transformer method operational mode of the present invention.
Embodiment
In conjunction with the accompanying drawings and embodiments the present invention is done further detailed description:
As shown in Figure 1, present embodiment comprises high-side signal treatment circuit 4, high-voltage DC power supply 9, high-voltage DC power supply 15, floating charge circuit 19, coupling capacitor 21 and low-side signal treatment circuit 25.
Tested current bus bar 1 is provided with compact high precision electromagnetic current transducer 2, current transformer 2 is converted to little current signal with the big current signal on the tested bus 1, owing to once be in high potential together with secondary winding, need not to consider the High-Voltage Insulation problem, it is very little that the volume of current transformer 2 can be done; Be provided with accurate sample resistance 3 in the secondary circuit of current transformer 2, sample resistance 3 converts current signal to light current and presses signal, and the load of current transformer 2 is fixed, and makes current transformer 2 adopt turn compensation can obtain very high certainty of measurement; The voltage signal that sample resistance 3 obtains is imported high-side signal treatment circuit 4 simultaneously; as shown in Figure 2; comprise overvoltage crowbar 5, biasing circuit 6, frequency modulation circuit 7 and electro-optical conversion circuit 8; be positioned on high-tension side same shielding box; shielding box is made by permeability magnetic material; be full of silicon rubber in the shielding box, with further antidetonation and protection against the tide.Modulation circuit 7 is selected the frequency modulation(FM) mode, and characteristics such as antijamming capability is good, simple in structure, reliability height that it has can adapt to the abominable electromagnetic environment in high-pressure side well; Biasing circuit 6 changes ambipolar voltage signal into unipolar voltage signal, introduces high-voltage DC power supply 9 output direct voltage state informations simultaneously; The output of biasing circuit 6 is connected with frequency modulation circuit 7, and frequency modulation circuit 7 is converted to frequency signal with voltage signal; The light-emitting diode that the frequency signal of frequency modulation circuit 7 outputs drives electro-optical conversion circuit 8 is converted to light pulse, and light signal sends to the photoelectric switching circuit 22 that is positioned at low-pressure side through optical fiber cable 20.
Because the high-pressure side is difficult to provide powerful power supply, VFC (voltage-frequency conversion) integrated chip of low-power consumption, single power supply is selected in frequency modulation(FM); The voltage signal that sample resistance 3 obtains is that ambipolar light current is pressed signal, must add direct current biasing and be converted to unipolar input signal, the voltage reference VREF that utilizes VFC integrated chip inside to provide realizes the biasing of sample resistance 3 output voltages by electric resistance partial pressure and simple supercircuit; In addition, increase other one tunnel voltage division signal of ultralow pressure monitoring chip 36 and analog switch 37 control voltage reference VREF, realize monitoring, as shown in Figure 2 the state information of high-voltage DC power supply 9 output direct voltages; The light-emitting diode of the frequency signal driving electro-optical conversion circuit 8 of VFC integrated chip output in the frequency modulation circuit 7 sends light pulse signal, and light signal sends to the signal processing circuit 25 that is positioned at low-pressure side through optical fiber cable 20; In the low-side signal treatment circuit 25, photoelectric switching circuit 22 will revert to from the light pulse signal of optical fiber cable 20 with by the frequency signal of the proportional relation of side electric current; Frequency signal entering signal demodulator circuit 23, it comprises analog demodulator and two kinds of demodulation modes of digital demodulation, analog demodulator is by the frequency-voltage conversion circuit of routine, amplifying circuit and phase-shift circuit constitute, digital demodulation directly adopts counter that frequency signal is counted, and the result who obtains sends into microprocessing systems and carries out computing, demonstration and output.
High-side signal treatment circuit 4 adopts the supply power mode of primary and secondary power, the operating state of high voltage source 15 is controlled by the control level signal that micro-processor interface circuit 24 sends, the signal that microprocessing systems 24 receives by monitoring is judged the operating state of main working power 9, send the control level signal simultaneously and enter control circuit 35, control circuit 35 is made of optocoupler 33 and relay 34, the on off operating mode of the power supply of the drive circuit 18 of the state decision laser 17 of relay 34 contacts, thereby the operating state of control high voltage source 15.
Because the high-side signal treatment circuit can't adopt the mode of common AC transformation rectification to carry out direct current supply, the dual power supply mode that present embodiment adopts coupling capacitor to extract electric energy and laser energy supply provides direct-current working volts for high-side signal treatment circuit 4.
The mode that extracts electric energy with coupling capacitor 21 constitutes reliability and the life problems that main power source has solved the long-term stable operation that laser 17 energy supplies bring, then solved the problem of the measurement discontinuity that mode that coupling capacitor 21 extracts electric energy brings with laser 17 energy supplies as accessory power supply, reduced performance requirement simultaneously high power laser.The present invention adopts the duplicate supply working method in major-minor loop, has guaranteed the stability and the reliability of the continuous measurement of active optics current transformer.
The method of present embodiment active optics current transformer comprises start-up mode and operational mode.Under start-up mode, when promptly active optics current transformer was thrown the electricity operation, as shown in Figure 7, the step of its method was as follows:
Step S1 manually boots the drive circuit 18 of laser 17, makes high voltage source 15 put into operation, and to 19 chargings of floating charge circuit;
Step S2, the state in monitoring active optics current transformer whole work loop, if operation irregularity sends abnormal signal, such as the laser powered sensor electric voltage exception, active optics current transformer can not normal operation input, requires to safeguard;
Step S3, if active optics current transformer is working properly, monitor one time the circuit running status, before a line voltage distribution is set up, promptly before the electricity operation is thrown in the installation of current transformer primary equipment, guarantee the charging of 15 pairs of floating charge circuit 19 of high voltage source, make active optics current transformer can carry out normal high-voltage current measurement.
Step S4, after a line voltage distribution was set up, high voltage source 9 put into operation, and to 19 chargings of floating charge circuit;
Step S5, the operating state of monitoring high voltage source 9, if operation irregularity sends abnormal signal, the supply power voltage that extracts electric energy such as capacitor is unusual, active optics current transformer can not normal operation input, requires to safeguard;
Step S6, if high voltage source 9 is working properly, according to the detected voltage bias signal of secondary terminals, microprocessing systems 24 sends normal signal to laser control circuit 35, cuts off the drive circuit 18 of laser 17 automatically, makes that high voltage source 15 is out of service;
At this moment, active optics current transformer enters normal operation mode, carries out normal high-voltage current measurement, and as shown in Figure 8, the step of its method is as follows:
Step S1, if the operating state of monitoring high voltage source 9 normal, is proceeded the measurement of high-tension current;
Step S2, if operation irregularity, according to the detected voltage bias signal of secondary terminals, microprocessing systems 24 sends abnormal signal to laser control circuit 35, automatically start the drive circuit 18 of laser 17, make high voltage source 15 put into operation, and floating charge circuit (19) is charged;
Step S3, if the operating state of continuation monitoring high voltage source 9 unusual, continues to guarantee that 15 pairs of floating charge circuit of high voltage source 19 charge;
Step S4 is if high voltage source 9 is working properly, according to the detected voltage bias signal of secondary terminals, microprocessing systems 24 sends normal signal to laser control circuit 35, automatically cut off the drive circuit 18 of laser 17, make that high voltage source 15 is out of service, continue the measurement of high-tension current.
Active optics current transformer of the present invention has reached 0.2 grade of measuring requirement through test-40 ℃ ~ 60 ℃ temperature range homeostasis certainties of measurement.
Claims (8)
1, a kind of active optics current transformer, it comprises high-side signal treatment circuit (4), main high-voltage DC power supply (9), auxiliary high-voltage DC power supply (15), floating charge circuit (19), coupling capacitor (21) and low-side signal treatment circuit (25), it is characterized in that: tested current bus bar (1) is provided with compact high precision electromagnetic current transducer (2), and current transformer (2) is converted to little current signal with the big current signal on the tested current bus bar (1); Be provided with accurate sample resistance (3) in the secondary circuit of current transformer (2), sample resistance (3) converts current signal to light current and presses signal; The voltage signal input high-side signal treatment circuit (4) that sample resistance (3) obtains is converted to the light pulse signal that reflects primary current information; Main high-voltage DC power supply (9) is a main power source, and auxiliary high-voltage DC power supply (15) is an accessory power supply, is in cold standby state, constitutes the supply power mode of primary and secondary power; The primary and secondary power input that inserts floating charge circuit (19) in parallel, the direct voltage of floating charge circuit (19) output are high-side signal treatment circuit (4) power supply; The light pulse signal of high-side signal treatment circuit (4) output sends to the signal processing circuit (25) that is positioned at low-pressure side through optical fiber cable (20); In low-side signal treatment circuit (25), photoelectric switching circuit (22) will revert to the frequency signal with the proportional relation of tested electric current from the light pulse signal of optical fiber cable (20), signal demodulating circuit (23) carries out demodulation to frequency signal, and the result who obtains sends into microprocessing systems (24) and carries out computing, demonstration and output.
2, active optics current transformer according to claim 1, it is characterized in that: described high-side signal treatment circuit (4) comprises overvoltage crowbar (5), biasing circuit (6), frequency modulation circuit (7) and electro-optical conversion circuit (8), be positioned on high-tension side same shielding box, biasing circuit (6) changes ambipolar voltage signal into unipolar voltage signal, introduces main high-voltage DC power supply (9) output direct voltage state information simultaneously; The output of biasing circuit (6) is connected with frequency modulation circuit (7), and frequency modulation circuit (7) is converted to frequency signal with voltage signal; The light-emitting diode that the frequency signal of frequency modulation circuit (7) output drives electro-optical conversion circuit (8) is converted to light pulse signal, and this light pulse signal sends to the photoelectric switching circuit (22) that is positioned at low-pressure side through optical fiber cable (20).
3, active optics current transformer according to claim 1, it is characterized in that: described main high-voltage DC power supply (9) adopts coupling capacitor to extract the design of electric energy, utilization is parallel to stable low current that the coupling capacitor (21) of tested current bus bar (1) produces as current source, for transformer (10) provides stable electric current; Transformer (10) changes stable current source into stable voltage source, press through follow-up direct current regulation circuit (14) output galvanic current, for high-side signal treatment circuit (4) provides stable direct-current working volts, direct current regulation circuit (14) comprises bridge rectifier (11), capacitor filter (12) and integrated stable voltage circuit (13).
4, active optics current transformer according to claim 1, it is characterized in that: described auxiliary high-voltage DC power supply (15) is realized by the photocell assembly (16) of high power laser (17) and high conversion efficiency, drive circuit (18) makes laser (17) export constant luminous power, and luminous power transfers to by optical fiber cable (20) and is positioned on high-tension side photocell assembly (16); Photocell assembly (16) receives the luminous power from the laser that is positioned at low-pressure side (17), and convert luminous power to direct voltage, for high-side signal treatment circuit (4) provides stable direct-current working volts, wherein, conventional signal transmission multimode fiber is adopted in luminous power transmission between laser (17) and the photocell assembly (16).
5, active optics current transformer according to claim 4, it is characterized in that: described high-side signal treatment circuit (4) adopts the supply power mode of main power source and auxilliary power supply, the operating state of described auxiliary high-voltage DC power supply (15) is controlled by the control level signal that microprocessing systems (24) sends, the signal that microprocessing systems (24) receives by monitoring is judged the operating state of described main high-voltage DC power supply (9), send the control level signal simultaneously and enter control circuit (35), described control circuit (35) is made of optocoupler (33) and relay (34), the on off operating mode of the power supply of the drive circuit (18) of the state decision laser (17) of relay (34) contact, thereby the operating state of the auxiliary high-voltage DC power supply (15) of control.
6, active optics current transformer according to claim 1, it is characterized in that: described coupling capacitor (21) adopts the form of filling dielectric in the composite hollow insulator chamber, in the central hollow epoxy rods (28) that increases an axis through bore of the chamber of composite hollow insulator (26), chamber interior is filled dielectric (27); Optical signal communications between the high-low pressure adopts non-metallic optical fiber cables, and the gap between epoxy rods (28) and the non-metallic optical fiber cables (30) directly uses epoxy resin (29) to seal in the end of epoxy rods (28).
7, active optics current transformer according to claim 2 is characterized in that: described shielding box is made by permeability magnetic material, is full of silicon rubber in the shielding box, with further antidetonation and protection against the tide.
8, active optics current transformer as claimed in claim 5 is thrown the method for operation of electricity operation, comprises start-up mode and operational mode, and under start-up mode, when promptly active optics current transformer was thrown electricity, the step of its method was as follows:
Step S1 manually boots the drive circuit (18) of laser (17), makes auxiliary high-voltage DC power supply (15) put into operation, and floating charge circuit (19) is charged;
Step S2, the state in monitoring active optics current transformer whole work loop, if operation irregularity sends abnormal signal, active optics current transformer can not normal operation input, requires to safeguard;
Step S3 if active optics current transformer is working properly, monitors one time the circuit running status, before a line voltage distribution is set up, guarantees the charging of auxiliary high-voltage DC power supply (15) to floating charge circuit (19);
Step S4, after a line voltage distribution was set up, main high-voltage DC power supply (9) put into operation, and floating charge circuit (19) is charged;
Step S5 monitors the operating state of main high-voltage DC power supply (9), if operation irregularity sends abnormal signal, active optics current transformer can not normal operation input, requires to safeguard;
Step S6, if main high-voltage DC power supply (9) is working properly, microprocessing systems (24) sends normal signal to control circuit (35), cuts off the drive circuit (18) of laser (17) automatically, makes that auxiliary high-voltage DC power supply (15) is out of service;
At this moment, active optics current transformer enters normal operation mode, carries out normal high-voltage current measurement, and the step of its method is as follows:
Step S1 monitors the operating state of main high-voltage DC power supply (9), if normally, proceed the measurement of high-tension current;
Step S2, if operation irregularity, microprocessing systems (24) sends abnormal signal to control circuit (35), starts the drive circuit (18) of laser (17) automatically, makes auxiliary high-voltage DC power supply (15) put into operation, and floating charge circuit (19) is charged;
Step S3, the operating state of the continuation main high-voltage DC power supply of monitoring (9) if unusual, continues to guarantee to assist high-voltage DC power supply (15) that floating charge circuit (19) is charged;
Step S4, if main high-voltage DC power supply (9) is working properly, microprocessing systems (24) sends normal signal to control circuit (35), cuts off the drive circuit (18) of laser (17) automatically, make that auxiliary high-voltage DC power supply (15) is out of service, continue the measurement of high-tension current.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101345128B (en) * | 2008-05-23 | 2010-06-02 | 北京浩霆光电技术有限责任公司 | High potential side energy supplying device of active electronic type photoelectric current mutual inductor |
| CN102221413B (en) * | 2011-03-11 | 2013-03-27 | 福建骐航实业有限公司 | Electronic current voltage combined type mutual inductor with temperature measuring apparatus |
| CN102944860B (en) * | 2012-10-31 | 2013-10-09 | 江苏省电力公司电力科学研究院 | Method and device for comparing running errors of optical current transformer and electromagnetic current transformer in real time |
| CN103630781B (en) * | 2013-11-27 | 2014-12-10 | 贵州电力试验研究院 | Composite energy supply non-contact on-line monitoring system for active electronic current transformer and data processing method thereof |
| CN103812496A (en) * | 2014-01-27 | 2014-05-21 | 中国南方电网有限责任公司超高压输电公司百色局 | Hybrid optical direct-current measuring system on-site converter |
| CN106059119A (en) * | 2016-06-13 | 2016-10-26 | 国网山东省电力公司滨州供电公司 | 10kV (Kilovolt) power unit of high voltage side of electronic current transformer |
| CN108320893B (en) * | 2017-01-17 | 2024-04-12 | 中国计量大学 | Offset type optical fiber transmission high-voltage current transformer |
| CN111510124B (en) * | 2020-03-20 | 2023-03-24 | 中国工程物理研究院流体物理研究所 | Magnetic bias weak light triggering high-power photoconductive switch |
| CN113241744B (en) * | 2021-06-09 | 2023-05-02 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Control loop of switching device in transformer substation |
-
2005
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Non-Patent Citations (2)
| Title |
|---|
| 一种高准确度有源光学电流互感器的研制与校验. 尚秋峰，杨以涵，高桦.电工技术学报，第20卷第3期. 2005 |
| 一种高准确度有源光学电流互感器的研制与校验. 尚秋峰，杨以涵，高桦.电工技术学报，第20卷第3期. 2005 * |
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