CN102565662B - State detection device for high-potential thyristor - Google Patents
State detection device for high-potential thyristor Download PDFInfo
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- CN102565662B CN102565662B CN201210068409.8A CN201210068409A CN102565662B CN 102565662 B CN102565662 B CN 102565662B CN 201210068409 A CN201210068409 A CN 201210068409A CN 102565662 B CN102565662 B CN 102565662B
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Abstract
The invention discloses a state detection device for a high-potential thyristor. The device comprises a detection circuit board and a detection resistor circuit, wherein the detection circuit board is connected with the detection resistor circuit and connected with a detected thyristor through the detection resistor circuit; the detection resistor circuit comprises detection resistors; the detection circuit board comprises two parallel branches, a first parallel branch comprises a first diode, and a second parallel branch comprises an optical fiber transmitter; when the detected thyristor withstands a forward voltage, current flows through the first diode in the detection circuit board to protect the optical fiber transmitter from withstanding over-high backward voltage; and when the detected thyristor withstands the backward voltage, the current flows through the optical fiber transmitter, the optical fiber transmitter transmits a signal through an optical fiber, and withstanding of the backward voltage by the detected thyristor is detected. The state detection device for the high-potential thyristor is applicable to a high-potential system, a special power circuit is not required to be provided for the detection circuit board, the state of the thyristor can be easily detected, and the optical fiber transmitter can reliably operate in the high-potential system.
Description
Technical field
The present invention relates to a kind of thyristor testing circuit, especially relate to the simple and convenient thyristor condition checkout gear of noble potential system in a kind of high-voltage and high-power power electronic device that has been applicable to apply thyristor.
Background technology
In having the high-voltage and high-power power electronic device of thyristor, often need to detect thyristor and whether puncture.Whether thyristor possesses the ability of bearing certain reverse voltage is the foundation that judges whether it punctures.On this basis, traditional detection method is at the two ends of detected thyristor several resistance in parallel, by detecting the wherein voltage of certain resistance, judges whether thyristor bears reverse voltage; Or the optocoupler of connecting in parallel resistance, judges by detecting the phototriode on off operating mode of optocoupler whether thyristor bears reverse voltage.In the middle of prior art, You Piyou state applied in 07 month 17 days calendar year 2001, and open on 02 20th, 2002, Chinese invention patent application < < thuristor working state detecting method > > that publication number is CN1336555A has adopted this kind of method.This disclosure of the invention a kind of detection method of thuristor working state, utilize the synchronizing signal that in thyristor control device, thyristor itself is used, adopt single-chip microcomputer in the one-period of this synchronizing signal, the pressure drop at thyristor two ends to be detected, with the thyristor pressure drop recording, reflect the duty of thyristor.
Er You Beijing Artime Intelligent Control Co., Ltd applied on Dec 21st, 2007, and open on 07 02nd, 2008, publication number be the disconnected testing circuit > > of the complete shut-down of CN101210949A Chinese invention patent application < < thyristor AC-AC frequency device proposed a kind of for testing circuit plate directly from power taking source, thyristor two ends and there is an active detection method of power circuit special.The disconnected testing circuit of complete shut-down of alternating-current-alternating-current frequency conversion system thyristor, belongs to thyristor frequency conversion technology.By voltage detecting circuit and logic judging circuit, formed.Wherein, the terminal voltage that is input as thyristor of voltage detecting circuit, output signal is delivered to logic judging circuit, by the disconnected detection signal of logic judging circuit output complete shut-down.Voltage detecting circuit is realized the detection to thyristor both end voltage, and logic judging circuit utilizes trigger pip and voltage detection signal to make logic judgement, provides the make-and-break signal of thyristor.
The method of original detection resistive voltage, need to provide power circuit for testing circuit.This power supply or provided by outside, or directly from high-potential thyristor, obtain.By outside, provide power supply, must solve electrical isolation problem, thyristor current potential of living in is higher, and isolation voltage is higher, and this has increased cost and the volume of device undoubtedly.From high-potential thyristor, obtain the power supply of testing circuit, its power taking source circuit more complicated.The method of original detection optocoupler phototriode on off operating mode, is subject to the restriction of the voltage isolation capabilities of photoelectrical coupler, no longer applicable during higher than certain value at thyristor current potential.
Therefore, invent a kind of simple and convenient pick-up unit of thyristor state that can be applicable to noble potential system and become technical matters urgently to be resolved hurrily.
Summary of the invention
The object of this invention is to provide a kind of state detection device for high-potential thyristor, this device circuit is simple in structure, is neither required to be testing circuit special power circuit is provided, and can be applicable to well noble potential system again.
The present invention specifically provides a kind of technic relization scheme of state detection device for high-potential thyristor, and a kind of state detection device for high-potential thyristor, comprising: testing circuit plate and detection resistance circuit.Detect resistance circuit and be connected with testing circuit plate, testing circuit plate is connected with tested thyristor by detecting resistance circuit; Detect resistance circuit and comprise detection resistance; Testing circuit plate comprises two branch roads parallel with one another, and the first parallel branch comprises the first diode, and the second parallel branch comprises fiber optic transmitter.When tested thyristor bears forward voltage, electric current flows through the first diode in testing circuit plate plate, to protect fiber optic transmitter not bear too high reverse voltage; When tested thyristor bears reverse voltage, electric current flows through fiber optic transmitter, and fiber optic transmitter is sent this signal by optical fiber again, detects tested thyristor and has born reverse voltage.
As the further improvement of a kind of state detection device for high-potential thyristor technical scheme of the present invention, testing circuit plate also comprises the 3rd parallel branch.The 3rd parallel branch comprises stabilivolt.Fiber optic transmitter is in parallel with stabilivolt; when tested thyristor bears forward voltage; stabilivolt by the limiting voltage at the second parallel branch fiber optic transmitter two ends in the scope of setting; stabilivolt is limited in the forward current that flows through the 3rd parallel branch in the scope of setting simultaneously, and over current fault does not occur protection fiber optic transmitter.
Further improvement as a kind of state detection device for high-potential thyristor technical scheme of the present invention, the second parallel branch also comprises current-limiting resistance, current-limiting resistance is in parallel with stabilivolt again after mutually connecting with fiber optic transmitter, current-limiting resistance again by the current limit of the second parallel branch in the scope of setting.
Further improvement as a kind of state detection device for high-potential thyristor technical scheme of the present invention, detect resistance circuit and comprise that the first detection resistance and second detects resistance, the first detection resistance and second detects resistance and is connected between tested thyristor and testing circuit plate, and the first detection resistance and second detects resistance need to select suitable power and resistance according to the voltage of noble potential system.
As the further improvement of a kind of state detection device for high-potential thyristor technical scheme of the present invention, the 3rd parallel branch comprises the second diode, the second diode and stabilivolt differential concatenation, and the second diode is used for stoping stabilivolt to flow through forward current.
As the further improvement of a kind of state detection device for high-potential thyristor technical scheme of the present invention, fiber optic transmitter is directly connected with noble potential system.
As the further improvement of a kind of state detection device for high-potential thyristor technical scheme of the present invention, tested thyristor is that electricity triggers thyristor or light triggered thyristor.
By implementing the technical scheme of a kind of state detection device for high-potential thyristor of the invention described above, there is following technique effect:
1, fiber optic transmitter is directly accessed in noble potential system, be not required to be testing circuit plate power circuit special is provided, just can detect simply and easily the state that electricity triggers thyristor and light triggered thyristor;
2, optical fiber isolation combines with passive electric circuit, makes technical solution of the present invention be applicable to higher current potential system;
3, the fiber optic transmitter overcurrent protection that adopts stabilivolt pressure limiting shunting to combine with resistance current limliting, has guaranteed fiber optic transmitter reliably working in noble potential system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the electrical connection schematic diagram of a kind of embodiment of prior art thuristor working state pick-up unit;
Fig. 2 is the electrical connection schematic diagram of the disconnected a kind of embodiment of testing circuit of prior art thyristor AC-AC frequency device complete shut-down;
Fig. 3 is the circuit catenation principle figure of a kind of embodiment of state detection device for high-potential thyristor of the present invention;
Wherein: 1-state detection device for high-potential thyristor; 2-testing circuit plate; 3-detects resistance circuit; The tested thyristor of 4-; V1-the first diode; V2-the second diode; V3-stabilivolt; HP1-fiber optic transmitter; R1-current-limiting resistance; R2-first detects resistance; R3-second detects resistance.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 3, provided the specific embodiment that a kind of state detection device for high-potential thyristor of the present invention is specifically applied in noble potential system thyristor state-detection in high-voltage and high-power power electronic device, below in conjunction with the drawings and specific embodiments, the invention will be further described.
A kind of embodiment is applied in high-pressure high-power thyristor current transformer, this high-power thyristor current transformer is a kind of typical noble potential system, the thyristor of this current transformer is triggered by pulse transformer, and wherein high-pressure high-power thyristor element to be detected is just in noble potential system.
As shown in Figure 3, state detection device for high-potential thyristor 1 comprises the circuit theory diagrams of a kind of embodiment of state detection device for high-potential thyristor of the present invention: testing circuit plate 2 and detection resistance circuit 3; Detect resistance circuit 3 and be connected with testing circuit plate 2, testing circuit plate 2 is connected with tested thyristor 4 by detecting resistance circuit 3 again; Detect resistance circuit 3 and comprise detection resistance; Testing circuit plate 2 comprises two branch roads parallel with one another: the first parallel branch comprises the first diode V1, and the second parallel branch comprises fiber optic transmitter HP1.When tested thyristor 4 bears forward voltage, electric current flows through the first diode V1 in testing circuit plate 2 plates, to protect fiber optic transmitter HP1 not bear too high reverse voltage; When tested thyristor 4 bears reverse voltage, electric current flows through fiber optic transmitter HP1, and fiber optic transmitter HP1 sends this signal by optical fiber again, detects tested thyristor 4 and has born reverse voltage.
The second parallel branch further comprises current-limiting resistance R1, and current-limiting resistance R1 connects mutually with fiber optic transmitter HP1, current-limiting resistance R1 again by the current limit of the second parallel branch in certain scope.Testing circuit plate 2 also further comprises the 3rd parallel branch, and the 3rd parallel branch comprises stabilivolt V3.Fiber optic transmitter HP1 is in parallel with stabilivolt V3 again after connecting with current-limiting resistance R1.When tested thyristor 4 bears forward voltage; stabilivolt V3 by the limiting voltage between the second parallel branch fiber optic transmitter HP1 and current-limiting resistance R1 in certain scope; stabilivolt V3 is limited in the forward current that flows through the 3rd parallel branch in certain scope simultaneously, and over current fault does not occur protection fiber optic transmitter HP1.
Detect resistance circuit 3 and comprise that the first detection resistance R 2 and second detects resistance R 3; The first detection resistance R 2 and second detects resistance R 3 and is connected between tested thyristor 4 and testing circuit plate 2; The first detection resistance R 2 and second detects resistance R 3 need to select suitable power and resistance according to the voltage of noble potential system.The 3rd parallel branch further comprises the second diode V2, the second diode V2 and stabilivolt V3 differential concatenation, and the second diode V2 is used for stoping stabilivolt V3 to flow through forward current.Fiber optic transmitter HP1 is directly connected with noble potential system.Tested thyristor 4 can trigger thyristor or light triggered thyristor for electricity.
The forward current of fiber optic transmitter HP1 has certain limitation, surpasses this restriction and may cause its damage.In embodiment, fiber optic transmitter HP1 is in parallel with stabilivolt V3 again after connecting with current-limiting resistance R1, for the protection of fiber optic transmitter HP1, over current fault does not occur.Stabilivolt V3 can be by the limiting voltage of fiber optic transmitter HP1 and current-limiting resistance R1 branch road in certain limit, and on this basis, current-limiting resistance R1 is limited in this branch current in certain limit again, is about to forward current and is limited in certain limit.
The above-mentioned passive thyristor condition checkout gear based on photoelectricity isolation, by being connected in parallel on the two ends of tested thyristor by detecting resistance, and connects fiber optic transmitter with current-limiting resistance.When tested thyristor bears certain reverse voltage, there is certain electric current to flow through fiber optic transmitter, the optical fiber being connected with fiber optic transmitter sends light signal to control system again.This device, by fiber optic transmitter is directly accessed in noble potential system, is not required to be testing circuit plate power supply is provided, and detects simply and easily the state that electricity triggers thyristor and light triggered thyristor.Optical fiber isolation combines with passive electric circuit, makes this device be applicable to higher current potential system.The fiber optic transmitter overcurrent protection method that adopts stabilivolt pressure limiting shunting to combine with resistance current limliting, has further guaranteed fiber optic transmitter reliably working in noble potential system.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction.Although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention.Any those of ordinary skill in the art, do not departing from technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible changes and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, be equal to replacements, equivalence changes and modify, all still belong in the scope that technical solution of the present invention protects.
Claims (5)
1. a state detection device for high-potential thyristor, is characterized in that, comprising: testing circuit plate (2) and detection resistance circuit (3); Described detection resistance circuit (3) is connected with testing circuit plate (2), and described testing circuit plate (2) is connected with tested thyristor (4) by detecting resistance circuit (3); Detect resistance circuit (3) and comprise detection resistance; Testing circuit plate (2) comprises two branch roads parallel with one another, and the first parallel branch comprises the first diode (V1), and the second parallel branch comprises fiber optic transmitter (HP1); When tested thyristor (4) bears forward voltage, electric current flows through the first diode (V1) in testing circuit plate (2) plate, to protect fiber optic transmitter (HP1) not bear too high reverse voltage; When tested thyristor (4) bears reverse voltage, electric current flows through fiber optic transmitter (HP1), and the signal that fiber optic transmitter (HP1) flows through this electric current by optical fiber is again sent, and detects tested thyristor (4) and has born reverse voltage; Described testing circuit plate (2) also comprises the 3rd parallel branch, the 3rd parallel branch comprises stabilivolt (V3), described fiber optic transmitter (HP1) is in parallel with stabilivolt (V3), when tested thyristor (4) bears forward voltage, described stabilivolt (V3) by the limiting voltage at the second parallel branch fiber optic transmitter (HP1) two ends in the scope of setting, stabilivolt (V3) is limited in the forward current that flows through the 3rd parallel branch in the scope of setting simultaneously, and over current fault does not occur protection fiber optic transmitter (HP1); The 3rd described parallel branch comprises the second diode (V2), described the second diode (V2) and stabilivolt (V3) differential concatenation, and the second diode (V2) is for stoping stabilivolt (V3) to flow through forward current.
2. a kind of state detection device for high-potential thyristor according to claim 1, it is characterized in that: the second described parallel branch also comprises current-limiting resistance (R1), current-limiting resistance (R1) is in parallel with stabilivolt (V3) again after connecting with fiber optic transmitter (HP1); Current-limiting resistance (R1) by the current limit of the second parallel branch in the scope of setting.
3. a kind of state detection device for high-potential thyristor according to claim 1 and 2, is characterized in that: described detection resistance circuit (3) comprises that the first detection resistance (R2) and second detects resistance (R3); Described the first detection resistance (R2) and second detects resistance (R3) and is connected between tested thyristor (4) and testing circuit plate (2); The first detection resistance (R2) and second detects resistance (R3) need to select suitable power and resistance according to the voltage of noble potential system.
4. a kind of state detection device for high-potential thyristor according to claim 3, is characterized in that: described fiber optic transmitter (HP1) is directly connected with noble potential system.
5. according to a kind of state detection device for high-potential thyristor described in arbitrary claim in claim 1,2,4, it is characterized in that: described tested thyristor (4) is electricity triggering thyristor or light triggered thyristor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210068409.8A CN102565662B (en) | 2012-03-15 | 2012-03-15 | State detection device for high-potential thyristor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210068409.8A CN102565662B (en) | 2012-03-15 | 2012-03-15 | State detection device for high-potential thyristor |
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| CN102565662A CN102565662A (en) | 2012-07-11 |
| CN102565662B true CN102565662B (en) | 2014-08-27 |
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| CN201210068409.8A Expired - Fee Related CN102565662B (en) | 2012-03-15 | 2012-03-15 | State detection device for high-potential thyristor |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102928758B (en) * | 2012-10-17 | 2015-11-04 | 株洲变流技术国家工程研究中心有限公司 | A kind of anti-parallel thyristor condition detecting system and method |
| CN102970029A (en) * | 2012-11-06 | 2013-03-13 | 北京广利核***工程有限公司 | High-safety digital quantity signal acquisition circuit |
| CN102998620B (en) * | 2012-12-17 | 2015-01-07 | 哈尔滨工业大学 | Device and method for quick online fault detection of high voltage thyristor valve block |
| CN103457590B (en) * | 2013-08-30 | 2016-10-05 | 株洲变流技术国家工程研究中心有限公司 | The detection method of photo thyristor built-in over-voltage protective and the generating means of status signal |
| CN103439640A (en) * | 2013-08-30 | 2013-12-11 | 株洲变流技术国家工程研究中心有限公司 | High-potential state detection device of anti-parallel thyristors |
| CN114184922B (en) * | 2020-08-25 | 2024-05-03 | 中车株洲电力机车研究所有限公司 | Diode device state detection system and method |
| CN112034394B (en) * | 2020-11-03 | 2021-01-15 | 中南大学 | Rectifier open-circuit fault diagnosis method based on current half-wave difference and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE7904751L (en) * | 1979-05-31 | 1980-12-01 | Asea Ab | DEVICE FOR Saturation of current, temperature and / or voltage in thyristors |
| JPS5836169A (en) * | 1981-08-28 | 1983-03-03 | Fuji Electric Co Ltd | Monitoring device for thyristor |
| CN2522867Y (en) * | 2001-05-28 | 2002-11-27 | 鞍山荣信电力电子股份有限公司 | Thyristor breakdown optical-fiber detection circuit |
| CN1336555A (en) * | 2001-07-17 | 2002-02-20 | 皮佑国 | Thuristor working state detecting method |
| CN2513118Y (en) * | 2001-09-27 | 2002-09-25 | 鞍山荣信电力电子股份有限公司 | Photoelectric converting circuit of thyristor breakdown detection |
| CN101806853B (en) * | 2010-05-07 | 2012-02-22 | 许继集团有限公司 | On-line test method and device for high-voltage thyristor |
| CN102116681A (en) * | 2011-02-23 | 2011-07-06 | 株洲变流技术国家工程研究中心有限公司 | Real-time detection device for high potential temperature and method thereof |
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