CN101806828B - Full-range measurement method of impulsive discharge current arranged at hot side - Google Patents
Full-range measurement method of impulsive discharge current arranged at hot side Download PDFInfo
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- CN101806828B CN101806828B CN2010101408151A CN201010140815A CN101806828B CN 101806828 B CN101806828 B CN 101806828B CN 2010101408151 A CN2010101408151 A CN 2010101408151A CN 201010140815 A CN201010140815 A CN 201010140815A CN 101806828 B CN101806828 B CN 101806828B
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Abstract
The invention relates to a full-range impulsive discharge current of impulsive discharge current arranged at the hot side. The method includes a transient current measurement method and a signal conversion method thereof, wherein the transient current measurement method arranged at the hot end respectively measures pilot minimum magnitude and post-breakthrough ultrahigh magnitude, an optic fiber is adopted for data transmission and insulation, a data receiving and conversion device and a graphical display control interface are arranged at the ground potential side, and the waves of discharge current can be real-timely displayed at background. The invention can ensure that the discharge current can be captured in the whole process from pilot to breakthrough at the moment of the breakthrough and flashover of various types of surge discharge, particularly when the struck position of a side electrode is random at the moment of long-interval discharge or surge discharge, that is, the invention has assured, full-range monitoring capability.
Description
Technical field
The invention belongs to transient current measurement category, especially in impulsive discharge transient current field of measuring technique.
Background technology
Natural lightning thunders, and amplitude, other pulse voltage of MHz level and current wave will appear in the thunderbolt place.In order the atmospheric electrical phenomena in the nature to be carried out the research of discharge mechanism; Discharge evolution and the mechanism of all types of insulation systems under the impulsive discharge form is studied; Just need through the high-tension testing equipment of analog pulse, carry out the discharge research of various gap-type, arrangement.Multi-faceted observation methods such as the electric current through transient state, voltage, light, sound, electric field, magnetic field go to catch, observe and explain, and then attempt to find its inherent mechanism.
There is an incubation period incipient stage that occurs in of gap discharge process, i.e. guide's discharge, and this process time is extremely short, discharge current is faint; It and gap discharge run through the high amplitude electric current that is showed and form sharp contrast, and only in these two kinds of extreme processes, transient current is caught all performance to some extent, just can help analysis, the explanation in later stage.
In the research in this regard; Traditional transient current acquisition equipment all is placed on the ground end of fixed position; Direct so common shielded cable is connected to the backstage, can observe through high-speed oscilloscope, and the overwhelming majority is only carried out single monitoring to the amplitude transient current.But high-pressure side that actual thunder and lightning discharges in discharge process and the ground end that will be hit all are at random; Fixing discharge takes place only if painstakingly make directed the concentrating of its electric field; Otherwise the device of end will be a random occurrence for catching of transient current with placing, and minimum amplitude, transient current wave capture in the discharge initial procedure will help the analysis of this type discharge mechanism, explanation.
Summary of the invention
The objective of the invention is to through with moving to high-pressure side on the current measuring device, and increase the measuring method of minimum amplitude current waveform in guide's discharge process, for the research of discharge evolution and mechanism provides clear and definite, FR current waveform reference data.
The present invention realizes through following technical proposal.
A kind of method that places the impulsive discharge electric current gamut measurement of hot side, characteristic of the present invention is:
(1) passive coil that will arrange by two stacks, and respectively independently matched impedance, several adopt and electrooptic conversion module and Transmission Fibers corresponding with two passive coil, and the current measuring device of common source formation places hot end;
(2) coil of two kinds of measurement ranges is arranged in stack, the minimum amplitude of a kind of measurement guide class, transient current waveform, and another kind of the measurement connects the high amplitude in back, transient current waveform;
(3) adopt measurement of inductance, hot end real time modelling signal capture, and carry out mould ﹣ synchronously and count the conversion of ﹣ light signal, adopt optical fiber to carry out data transmission and insulation isolation, discharge current waveform can show on the backstage in real time;
(4) place conversion of signals and transmitting device on the hot end current measuring device, can switch arbitrarily in dormancy and duty through the backstage, power supply mode is the high capacity rechargeable lithium-ion battery.
The transient current of two different bandwidths and measurement amplitude is measured the coil stack be installed in high-voltage connection end (test product side), simulating signal is separately caught, mould ﹣ counts the conversion of ﹣ light signal and the optical signal transmission passage is independent, and power supply is shared.Carry out data transmission and insulation isolation through optical fiber, through the backstage high-pressure side data-switching and transport module are switched in dormancy and duty arbitrarily, take place in case guarantee discharge, whole current waveform can completely be caught.
The invention has the beneficial effects as follows; The impulsive discharge current measuring device that places hot side solved that high and low two kinds of amplitude type transient currents are caught, after the problem of data-switching and insulation transmission; Make in the modeling effort test of this type; Not only catching of transient current becomes a definite incident, and the interior current waveform analysis data of wide region can be provided.
The present invention is when all types of impulsive discharge punctures, flashover; When especially long gap discharge or impulsive discharge lateral electrode is hit the position at random the time; Can guarantee beforely to be directed at that discharge current is caught in the overall process that runs through, promptly possess clear and definite, FR monitoring capability.
Further set forth content of the present invention below in conjunction with accompanying drawing and instance.
Description of drawings
Fig. 1 is that a whole set of measurement mechanism is arranged synoptic diagram;
Fig. 2 is the measurement mechanism structural representation.
Embodiment
A kind of method that places the impulsive discharge electric current gamut measurement of hot side, characteristic of the present invention is:
(1) passive coil that will arrange by two stacks, and respectively independently matched impedance, several adopt and electrooptic conversion module and Transmission Fibers corresponding with two passive coil, and the current measuring device of common source formation places hot end;
(2) coil of two kinds of measurement ranges is arranged in stack, the minimum amplitude of a kind of measurement guide class, transient current waveform, and another kind of the measurement connects the high amplitude in back, transient current waveform;
(3) adopt measurement of inductance, hot end real time modelling signal capture, and carry out mould ﹣ synchronously and count the conversion of ﹣ light signal, adopt optical fiber to carry out data transmission and insulation isolation, discharge current waveform can show on the backstage in real time;
(4) place conversion of signals and transmitting device on the hot end current measuring device, can switch arbitrarily in dormancy and duty through the backstage, power supply mode is the high capacity rechargeable lithium-ion battery.
Fig. 1 shows a kind of layout synoptic diagram of a whole set of measurement mechanism.1 is voltage generator among the figure, and 2 is voltage divider, and 3 is high-voltage connection, and 4 is optical fiber, and 5 is insulator, and 6 are the current measurement coil, and 7 is metal bar, and 8 is the door type frame structure, and 9 is ground, and 10 are the demonstration of transient current backstage.
Among Fig. 1 on the steelframe structure suspension insulator, high-voltage connection to insulator is terminal, has so just constituted a kind of discharging gap over the ground; And the insulator end can equivalence be definite effluve position; No matter the electrode structure (rod, plate or line) of which kind of form is placed on ground, transient current is measured coil place insulator end below, no matter which kind of electrode structure; As long as the discharge of effluve position to the arbitrfary point, ground arranged, can guarantee to catch discharge current.And,,, also can accurately catch discharge current even if the discharge of effluve position to the steelframe structure takes place then for bigger discharging gap if the current measurement coil is moved on the high-voltage connection between voltage divider and insulator.Measuring-signal, and is presented on the graphics display control interface to the backstage, ground through Optical Fiber Transmission that insulating capacity is arranged after being converted into light signal on the spot in real time.
Fig. 2 shows the synoptic diagram of measurement structure, and 11 is passive coil among Fig. 2, and 12 is matched impedance, and 13 is that number is adopted and the electric light conversion, and 14 is optical fiber, and 15 is lithium battery.
A coil has only drawn among Fig. 2.A whole set of in fact measurement mechanism has two passive coil, and the inner lead winding is different, and the matched impedance module is independently, and corresponding number is adopted, electric light conversion and Transmission Fibers are independent respectively, and lithium battery supplies that two tricks are adopted and the electrooptic conversion module power supply.Place conversion of signals and the transmitting device on the hot end current measuring device through starting on the backstage; Make it be in running status; In case there is discharge to take place; Small magnitude is measured the coil emphasis and is caught the transient current waveform in the leader process, and big amplitude slotted line circle is caught normal discharge transient current waveform.
Claims (1)
1. method that the impulsive discharge electric current gamut that places hot side is measured is characterized in that:
(1) passive coil that will arrange by two stacks, and respectively independently matched impedance, several adopt and electrooptic conversion module and Transmission Fibers corresponding with two passive coil, and the current measuring device of common source formation places hot end;
(2) coil of two kinds of measurement ranges is arranged in stack, the minimum amplitude of a kind of measurement guide class, transient current waveform, and another kind of the measurement connects the high amplitude in back, transient current waveform;
(3) adopt measurement of inductance, hot end real time modelling signal capture, and carry out mould ﹣ synchronously and count the conversion of ﹣ light signal, adopt optical fiber to carry out data transmission and insulation isolation, discharge current waveform can show on the backstage in real time;
(4) place conversion of signals and transmitting device on the hot end current measuring device, can switch arbitrarily in dormancy and duty through the backstage, power supply mode is the high capacity rechargeable lithium-ion battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101408151A CN101806828B (en) | 2010-04-07 | 2010-04-07 | Full-range measurement method of impulsive discharge current arranged at hot side |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101408151A CN101806828B (en) | 2010-04-07 | 2010-04-07 | Full-range measurement method of impulsive discharge current arranged at hot side |
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| Publication Number | Publication Date |
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| CN101806828A CN101806828A (en) | 2010-08-18 |
| CN101806828B true CN101806828B (en) | 2012-05-23 |
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| CN112083214B (en) * | 2020-08-28 | 2023-05-16 | 广东电网有限责任公司广州供电局 | Current measuring device for pilot discharge process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6437554B1 (en) * | 1999-11-19 | 2002-08-20 | The United States Of America As Represented By The Secretary Of The Interior | High current measurement system incorporating an air-core transducer |
| US7321227B2 (en) * | 2005-04-13 | 2008-01-22 | Huettinger Elektronik Gmbh + Co. Kg | Measuring electrical current flowing through a conductor |
| CN101237124A (en) * | 2008-02-01 | 2008-08-06 | 武汉恒安电气有限责任公司 | Status indicator of arrester with gap line |
-
2010
- 2010-04-07 CN CN2010101408151A patent/CN101806828B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6437554B1 (en) * | 1999-11-19 | 2002-08-20 | The United States Of America As Represented By The Secretary Of The Interior | High current measurement system incorporating an air-core transducer |
| US7321227B2 (en) * | 2005-04-13 | 2008-01-22 | Huettinger Elektronik Gmbh + Co. Kg | Measuring electrical current flowing through a conductor |
| CN101237124A (en) * | 2008-02-01 | 2008-08-06 | 武汉恒安电气有限责任公司 | Status indicator of arrester with gap line |
Non-Patent Citations (3)
| Title |
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| 张涛等.罗果夫斯基线圈测量高电压及电力系统中的暂态电流.《电工电能新技术》.2002,第21卷(第3期),第53-56页. * |
| 杨波等.雷电流测量专用柔性无磁芯大型Rogowski线圈.《强激光与粒子束》.2009,第21卷(第9期),第1421-1425页. * |
| 陈温良等.电力电容器试验用脉冲电流传感器的研制与应用.《电力电容器与无功补偿》.2010,第31卷(第1期),第51-56页. * |
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