CN203054177U - High-voltage thyristor breakdown detection device - Google Patents
High-voltage thyristor breakdown detection device Download PDFInfo
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- CN203054177U CN203054177U CN 201220717356 CN201220717356U CN203054177U CN 203054177 U CN203054177 U CN 203054177U CN 201220717356 CN201220717356 CN 201220717356 CN 201220717356 U CN201220717356 U CN 201220717356U CN 203054177 U CN203054177 U CN 203054177U
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- thyristor
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Abstract
The utility model discloses a high-voltage thyristor breakdown detection device, which comprises two input ends, a first branch circuit and a second branch circuit connected between the two input ends in a parallel way. The first branch circuit is an inverse parallel circuit composed of a first thyristor and a second thyristor. The second branch circuit comprises a first resistor, a second resistor, a third resistor, a fiber transmitter and a light emitting diode which are sequentially serially connected. The high-voltage thyristor breakdown detection device is suitably used in high-voltage solid-state soft starting devices, high-voltage static type dynamic reactive power compensators and other electric and electronic deflectors composed of high-voltage thyristor serially-connected valve blocks for a circuit requiring high-potential thyristor state detection. The detection device requires no external power supply. Meanwhile, the high-voltage main circuit and the low-voltage control circuit are isolated through fibers. Electromagnetic environment interference is thus prevented.
Description
Technical field
The utility model relates to a kind of high-pressure thyristor and punctures testing circuit, and the thyristor that is widely used in high-pressure thyristor solid soft start and the high voltage static type dynamic reactive power compensation equipment punctures pick-up unit.
Background technology
In high-voltage solid-state soft start and high voltage static type dynamic reactive power compensation equipment; and in other electronic power conversion device that is constituted by high-pressure thyristor; whether often need to detect thyristor punctures; if can not in time detect the state of the thyristor in the series connection valve group and take safeguard measure fast and effectively; with the scope of expansion accident, it will be particularly important that therefore a kind of high-pressure thyristor punctures pick-up unit.Whether thyristor possesses the ability of bearing certain reverse voltage is the foundation of judging whether it punctures, common detection method is powerful resistance in parallel at detected thyristor two ends, compare by dividing potential drop mode and given voltage, then fault-signal is carried out logical process and return to control system by optical fiber; Or the optocoupler of in sampling resistor in parallel, connecting, judge by phototriode on off operating mode in the optocoupler whether thyristor punctures.
In above-mentioned two kinds of methods, all need for testing circuit provides power supply, this power supply can be provided by the outside, or directly from noble potential directly get can mode obtain.Provide power supply by the outside, must solve high-low pressure electrical isolation problem, therefore increased volume and the cost of device.Directly get energy from noble potential, may occur getting to some power electronic equipment can be not enough, and it gets energy circuit more complicated.For adopting optocoupler to carry out the circuit of thyristor state-detection, owing to be subjected to the withstand voltage restriction of light-coupled isolation, when system voltage is higher than certain value, then exist bigger potential safety hazard.
The utility model content
The purpose of this utility model is in order to provide a kind of high-pressure thyristor to puncture pick-up unit, and this device circuit is simple in structure, neither needs complicated power-supplying circuit, can guarantee that again high-low pressure reliably isolates, and anti-electromagnetic interference capability is strong etc.
A kind of high-pressure thyristor punctures pick-up unit, comprises two input ends, is connected in parallel on first branch road and second branch road between described two input ends; The inverse parallel circuit that described first branch road is made up of first thyristor and second thyristor, described second branch road comprise first resistance, second resistance, the 3rd resistance, fiber optic transmitter and the light emitting diode of series connection successively.
The beneficial effects of the utility model: this device is in a kind of other electronic power conversion device that can be applicable to high-voltage solid-state soft starter device and high voltage static type dynamic reactive compensation device and be made up of high-pressure thyristor series connection valve group, needs a kind of circuit of detection noble potential thyristor state.This pick-up unit does not need to provide external power source, and high pressure major loop and the isolation of low-voltage control circuit employing optical fiber, not disturbed by electromagnetic environment.
Description of drawings
In order to be illustrated more clearly in the technical solution of the utility model, the accompanying drawing of required use is done to introduce simply in will describing the utility model below.
Fig. 1 is the circuit catenation principle figure that the utility model high-pressure thyristor punctures a kind of embodiment of pick-up unit.
Wherein: T1, T2: high-pressure thyristor; R1: first resistance; R2: second resistance; D1: first diode; D2: second voltage stabilizing diode; R3: the 3rd resistance; C1: first electric capacity; TX: fiber optic transmitter; D3: the 3rd light emitting diode.
Embodiment
As shown in Figure 1, a kind of high-pressure thyristor of the utility model punctures the specific embodiment that pick-up unit specifically is applied in the noble potential system thyristor state-detection in the high-voltage solid-state soft starter device, simultaneously present embodiment also is applicable in the electronic power conversion device that high voltage static type dynamic reactive power compensation equipment etc. is made up of the high-pressure thyristor valve group, as high-pressure thyristor puncture testing circuit fully.Based on embodiment of the present utility model, those of ordinary skills belong to protection domain of the present utility model not making the every other embodiment that obtains under the creative work prerequisite.
A kind of high-pressure thyristor punctures pick-up unit, comprises two input ends, is connected in parallel on first branch road and second branch road between two input ends; The inverse parallel circuit that first branch road is made up of the first thyristor T1 and the second thyristor T2, second branch road comprise first resistance R 1, second resistance R 2, the 3rd resistance R 3, fiber optic transmitter TX and the light emitting diode D3 of series connection successively.
The anode of fiber optic transmitter TX is connected with the 3rd resistance R 3, and negative electrode is connected with light emitting diode D3 anode, is parallel with a capacitor C 1 between the negative electrode of the anode of fiber optic transmitter TX and light emitting diode D3.
This pick-up unit also comprises first a diode D1, and the anode of the first diode D1 is connected with the negative electrode of light emitting diode D3, and the end that the 3rd resistance R 3 links to each other with second resistance R 2 links to each other with the negative electrode of the first diode D1.
This pick-up unit also comprises a voltage stabilizing diode D2, and the anode of voltage stabilizing diode D2 is connected with the negative electrode of light emitting diode D3, and the end that the 3rd resistance R 3 links to each other with second resistance R 2 links to each other with the negative electrode of voltage stabilizing diode D2.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
The circuit theory diagrams of a kind of embodiment of the utility model high-pressure thyristor puncture pick-up unit as shown in Figure 1, the noble potential thyristor punctures pick-up unit and comprises: by two thyristor T1, the inverse parallel circuit that T2 forms, resistance R 1 is connected with resistance R 2, wherein resistance R 1 one ends connect the negative electrode T1K of thyristor T1, resistance R 2 other ends connect the negative electrode of diode D1, the anode of D1 diode connects the negative electrode T2K of thyristor T2, the negative electrode of voltage stabilizing diode D2 connects the D1 negative electrode, the D2 anode connects the D1 anode, resistance R 3 one ends connect the negative electrode of voltage stabilizing diode D2, the other end and capacitor C 1 connect and compose filtering circuit, the anode of fiber optic transmitter TX connects the other end of resistance R 3, the negative electrode of fiber optic transmitter connects the anode of light emitting diode D3, and the negative electrode of light emitting diode D3 is connected to the negative electrode T2K of thyristor T2.
When thyristor T1 bears reverse voltage, after noble potential process R1, the R2 resistance in series step-down current limliting, flow into fiber optic transmitter TX and light emitting diode D3 through R3, get back to the negative electrode T2K end of thyristor T2 at last.When fiber optic transmitter TX has electric current to flow through detection signal is delivered in the low voltage control system, whether while light emitting diode D3 very visual indication has electric current to flow through, and thyristor punctures if light emitting diode D3 extinguishes, otherwise normal.Resistance R 1 and R2 adopt high-power resistance, and the high pressure of major loop is dropped to suitable electric pressure, so that subsequent detection, restriction simultaneously flows into the electric current of fiber optic transmitter, and the protection fiber optic transmitter is not damaged.
Article one parallel branch that is constituted by the first diode D1, the negative electrode of D1 is connected resistance R 2 one ends, its anode is connected on the negative electrode T2K of T2, when high-pressure thyristor T1 bears forward voltage, electric current will arrive thyristor T1 negative electrode T1K through D1, R1, R2, prevent that fiber optic transmitter TX from damaging because bearing direction voltage.
The second parallel branch that is constituted by voltage stabilizing diode D2; the negative electrode of D2 is connected on the negative electrode of D1; the anode of D2 is connected on the anode of D1; voltage stabilizing diode D2 is limited in the voltage between fiber optic transmitter and the resistance R 3 in the certain limit, and overcurrent fault does not take place protection fiber optic transmitter TX.
The 3rd parallel branch that is constituted by resistance R 3 and capacitor C 1.The end of R3 connects the negative electrode of voltage stabilizing diode D2, capacitor C 1 one ends connect the negative electrode T2K of thyristor T2, and by the RC filtering circuit that resistance R 3, C1 form, restriction flows into the electric current of the TX of fiber optic transmitter on the one hand, the various interference of filtering on the one hand are in order to avoid cause the wrong report fault.
The 4th parallel branch by fiber optic transmitter TX and light emitting diode D3 series connection assembling.When thyristor T1 bears reverse voltage, will there be electric current to flow into fiber optic transmitter TX and light emitting diode D3, fiber optic transmitter TX will puncture detection signal and be delivered to low voltage control system, and whether while light emitting diode D3 very visual indication thyristor punctures.During puncture, the thyristor terminal voltage is zero does not have electric current to flow into, and pilot lamp will extinguish.
A kind of high-pressure thyristor of above-mentioned introduction punctures pick-up unit, by high-voltage and current-limitation resistance and fiber optic transmitter are connected in parallel on by side thyristor two ends, when tested thyristor bears certain reverse voltage, there is certain electric current to flow through fiber optic transmitter, thereby detection signal is delivered to low voltage control system.This device is not owing to need for testing circuit provides accessory power supply, and adopts optical fiber to isolate, and therefore is that a kind of high-pressure thyristor punctures the simple and convenient method that detects.
By implementing the technical scheme that a kind of high-pressure thyristor of above-mentioned the utility model punctures pick-up unit, have following technique effect:
1, high pressure major loop and low-voltage control circuit transmit fault-signal by optical fiber, are applicable to than higher system voltage.
2, do not need just can detect the state of high-pressure thyristor very easily for testing circuit provides special-purpose power circuit.
3, adopt high-power resistance series connection, fly-wheel diode, voltage stabilizing diode and rc filter circuit etc. to make optical fiber generator reliably working in the noble potential system.
This circuit structure is simple, and is easy to detect, and detection signal is exported with light signal, eliminated the distortion that detection signal produces owing to electromagnetic interference (EMI) in transmission course, guarantees that control system does not produce misoperation.
Realization of the present utility model is described for example, has described above-mentioned embodiment.But other variations of the present utility model and modification; be apparent for those skilled in the art, any modification/variation in essence disclosed in the utility model and cardinal rule scope or imitation conversion all belong to claim protection domain of the present utility model.
Claims (4)
1. a high-pressure thyristor punctures pick-up unit, it is characterized in that, comprises two input ends, is connected in parallel on first branch road and second branch road between described two input ends; The inverse parallel circuit that described first branch road is made up of first thyristor and second thyristor, described second branch road comprise first resistance, second resistance, the 3rd resistance, fiber optic transmitter and the light emitting diode of series connection successively.
2. a kind of high-pressure thyristor according to claim 1 punctures pick-up unit, it is characterized in that, the anode of described fiber optic transmitter is connected with described the 3rd resistance, negative electrode is connected with described light-emitting diode tube anode, is parallel with an electric capacity between the negative electrode of the anode of described fiber optic transmitter and described light emitting diode.
3. a kind of high-pressure thyristor according to claim 2 punctures pick-up unit, it is characterized in that, described pick-up unit also comprises first diode, the anode of described first diode is connected with the negative electrode of described light emitting diode, and the end that described the 3rd resistance links to each other with described second resistance links to each other with the negative electrode of described first diode.
4. a kind of high-pressure thyristor according to claim 3 punctures pick-up unit, it is characterized in that, described pick-up unit also comprises a voltage stabilizing diode, the anode of described voltage stabilizing diode is connected with the negative electrode of described light emitting diode, and the end that described the 3rd resistance links to each other with described second resistance links to each other with the negative electrode of described voltage stabilizing diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220717356 CN203054177U (en) | 2012-12-24 | 2012-12-24 | High-voltage thyristor breakdown detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220717356 CN203054177U (en) | 2012-12-24 | 2012-12-24 | High-voltage thyristor breakdown detection device |
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| Publication Number | Publication Date |
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| CN203054177U true CN203054177U (en) | 2013-07-10 |
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| CN 201220717356 Expired - Fee Related CN203054177U (en) | 2012-12-24 | 2012-12-24 | High-voltage thyristor breakdown detection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107765159A (en) * | 2016-08-23 | 2018-03-06 | 株洲中车时代电气股份有限公司 | IGCT on-Line Monitor Device |
| CN108646164A (en) * | 2018-07-26 | 2018-10-12 | 大力电工襄阳股份有限公司 | High-pressure thyristor on-Line Monitor Device |
| CN110187250A (en) * | 2019-06-05 | 2019-08-30 | 吉林华微电子股份有限公司 | Test method and test macro |
| CN113960440A (en) * | 2021-12-21 | 2022-01-21 | 成都麦隆电气有限公司 | Fault detection and protection method for anti-parallel thyristor |
-
2012
- 2012-12-24 CN CN 201220717356 patent/CN203054177U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107765159A (en) * | 2016-08-23 | 2018-03-06 | 株洲中车时代电气股份有限公司 | IGCT on-Line Monitor Device |
| CN107765159B (en) * | 2016-08-23 | 2019-08-23 | 株洲中车时代电气股份有限公司 | Thyristor on-Line Monitor Device |
| CN108646164A (en) * | 2018-07-26 | 2018-10-12 | 大力电工襄阳股份有限公司 | High-pressure thyristor on-Line Monitor Device |
| CN110187250A (en) * | 2019-06-05 | 2019-08-30 | 吉林华微电子股份有限公司 | Test method and test macro |
| CN113960440A (en) * | 2021-12-21 | 2022-01-21 | 成都麦隆电气有限公司 | Fault detection and protection method for anti-parallel thyristor |
| CN113960440B (en) * | 2021-12-21 | 2022-08-12 | 成都麦隆电气有限公司 | Fault detection and protection method for anti-parallel thyristor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20181224 |