CN106707157A - Thyratron detection and protection system applied to high voltage circuit - Google Patents
Thyratron detection and protection system applied to high voltage circuit Download PDFInfo
- Publication number
- CN106707157A CN106707157A CN201710019859.0A CN201710019859A CN106707157A CN 106707157 A CN106707157 A CN 106707157A CN 201710019859 A CN201710019859 A CN 201710019859A CN 106707157 A CN106707157 A CN 106707157A
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- Prior art keywords
- thyratron
- circuit
- trigger signal
- heating power
- heating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Protection Of Static Devices (AREA)
- Power Conversion In General (AREA)
Abstract
The invention discloses a thyratron detection and protection system applied to a high voltage circuit; the system comprises a thyratron; a thyratron control grid electrode and a thyratron trigger signal can form circuit connection; two heating ends of the thyratron are respectively connected with a heating power source; the two heating power sources are respectively connected with a protection circuit in parallel. The system uses a current transformer to detect heating currents of the two heating power sources; the heating resistor open circuit is main abnormal condition, so the current detection mode is employed so as to ensure the heating power source and the heating circuit to normally work; the thyratron trigger end can output a fiber indication signal, thus ensuring the thyratron to obtain the normal trigger signal; a specific logic control circuit is designed so as to carry out logic determination for two detection signals above, and if abnormity happens, the laser system is stopped immediately, and alarms can be sent out.
Description
Technical field
The invention mainly relates to high-tension circuit technical field, and in particular to a kind of thyratron inspection being applied in high-tension circuit
Survey and protection system.
Background technology
Thyratron is a kind of conventional high voltage switch circuit element, high pressure can be born when being normally off and reached 10 ~ 50kV, led
10 ~ 30kA can be reached by current peak when logical, be mainly used in the controlled conducting of high-tension circuit, produced high-voltage pulse and enter
Row energy transfer etc., main is applied to the fields such as high-voltage pulse, laser technology, gas discharge, Radar Technology.Due to thyratron
It is to bear high-tension switch element in circuit, its reliable and stable conducting is the necessary condition of circuit normal work, is also to protect
The necessary condition of barrier instrument and equipment and personal security.
The structure of thyratron is main as shown in figure 1, the main occupation mode of thyratron is as follows：It is right first to need
Two adding thermal resistances of Reservoir and Heater are heated；Required heating power supply is for about electricity between wherein Reservoir and com
Pressure 6.3V, the A of electric current more than ten；The power supply of required heating power supply is for about voltage 6.3V, several A of electric current between Heater and Com.Heating is completed
Afterwards, thyratron can be turned under the trigger signal effect of control gate level.Ground connection of the grid trigger signal according to thyratron
Mode is different and slightly different, is+700 when the thyratron requirement trigger signal of usual minus earth is for usually -150VDC, triggering
The spike of ~+1000V, the μ s of width 1 ~ 2, such as Fig. 2；The thyratron of grounded-grid is then opposite, it is desirable to trigger signal for usually+
It is -700 ~ -1000V, the spike of the μ s of width 1 ~ 2, such as Fig. 3 when 150VDC, triggering.
If according to normal occupation mode recited above, thyratron can be used normally in working life, stabilization
Reliable triggering high-tension circuit conducting, is conducive to the safety of equipment and personnel.So for several use conditions above, the present invention
Special protection circuit is devised to carry out real-time detection and protection.
The content of the invention
The object of the invention is exactly to make up the defect of prior art, there is provided a kind of thyratron being applied in high-tension circuit
Detection and protection system.
The present invention is achieved by the following technical solutions：
A kind of thyratron detection being applied in high-tension circuit and protection system, include thyratron, the control gate of thyratron
Circuit is produced to be connected with thyratron trigger signal, two fire ends of thyratron connect a heating power supply respectively, and its feature exists
In：A two heating power supplies difference protection circuit in parallel, two protection circuits include a current transformer, electric current respectively
An electric capacity is connected between the other two ends of transformer, one end of electric capacity is connected by node and put by node ground connection, the other end
The electrode input end of big device, the negative input ground connection of amplifier, and pass through between the output end and negative input of amplifier
Feedback resistance feedback link, the output end connection electrode input end of first via comparator of amplifier, the second road comparator it is negative
Pole input, the output end of two-way comparator accesses two inputs with door, and the two of two protection circuits terminate with the output of door
Enter the 3rd and door, the 3rd accesses the D ends of d type flip flop with the output end of door, and the CLK ends of d type flip flop are connected to by emitting optical fiber
The control gate and thyratron trigger signal of thyratron are produced between circuit, and thyratron trigger signal produces the Q ends of circuit, resets
End is connected to master control system by emitting optical fiber respectively, and master control system is also produced by emitting optical fiber with thyratron trigger signal
Raw circuit connection.
Principle of the invention is：
1st, heating power supply carries out normal heating to thyratron, and two-way current transformer obtains current sensing signal, amplified respectively
It is compared with upper and lower two threshold voltages afterwards, when current value is in normal range (NR), the high level warp of four road comparator outputs
Be output as high level behind the door, deliver to the D ends of d type flip flop；If any abnormal signal all the way, low level is exported with door；
2nd, thyratron triggering end connects emitting optical fiber generation optical signal as detection signal, and the direction of its connection depends on thyratron
Trigger signal it is positive and negative；The signal delivers to protection board after Optical Fiber Transmission, and protection board is obtained after being changed through optical signal receiving module
Electric signal delivers to the CLK ends of d type flip flop；
3rd, master control system sends trigger signal when needing first, at the same deliver to thyratron trigger signal produce circuit and
Protection circuit；The signal for delivering to protection circuit resets d type flip flop, waits the signal at CLK ends；Deliver to thyratron trigger signal product
Raw circuit, circuit sends out detection signal simultaneously according to required generation signal triggering thyratron；
4th, the detection signal of triggering produces rising edge signal after transmission at d type flip flop CLK ends, normal in all current detectings
In the case of D be high level, then the rising edge of CLK can cause that Q is exported and high level and be transmitted after Fiber isolation to master control system；
If master control system thinks that thyratron system is normal after the indication signal is detected, lower subpulse triggered as normal；If electric current is examined
Abnormal signal or thyratron are surveyed without triggered as normal signal, then master control system can't detect normal signal, it is believed that thyratron system
System is abnormal, and the pulse of next time stops, and system alarm.
It is an advantage of the invention that：
The present invention detects two heated currents of heating power supply using current transformer；Because there are abnormal main conditions herein
It is adding thermal resistance open circuit, so by the way of current detecting, it is ensured that the normal work of heating power supply and heater circuit；The present invention
Optical fiber indication signal output is carried out in the triggering end of thyratron, it is ensured that thyratron is obtained in that normal trigger signal；The present invention
Two kinds of detection signals above are carried out logic judgment by the special logic control circuit of design, in the event of abnormal, are then stopped immediately
Only the work of laser system and alarm；Communicated the safety ensured by the way of Fiber isolation in hyperbaric environment between multisystem
Interference is used and suppressed, the reliable and stable operation of each system is realized.
Brief description of the drawings
Fig. 1 is the structural representation of thyratron of the invention.
Fig. 2 is the spike schematic diagram when thyratron of minus earth is triggered.
Fig. 3 is the spike schematic diagram when thyratron of grounded-grid is triggered.
Fig. 4 is system schematic of the invention.
Specific embodiment
As shown in figure 4, a kind of thyratron detection being applied in high-tension circuit and protection system, include thyratron, lock
The control gate of flow tube produces circuit to be connected with thyratron trigger signal, and two fire ends of thyratron connect a heating respectively
Power supply, a two heating power supplies difference protection circuit in parallel, two protection circuits include a current transformer respectively, and electric current is mutual
An electric capacity is connected between the other two ends of sensor, one end of electric capacity is connected by node ground connection, the other end by node amplifies
The electrode input end of device, the negative input ground connection of amplifier, and by anti-between the output end and negative input of amplifier
Feed resistance feedback link, the output end of amplifier connects electrode input end, the negative pole of the second road comparator of first via comparator
Input, the output end of two-way comparator accesses two inputs with door, and the two of two protection circuits access with the output end of door
3rd and door, the 3rd accesses the D ends of d type flip flop with the output end of door, and the CLK ends of d type flip flop are connected to lock by emitting optical fiber
The control gate and thyratron trigger signal of flow tube are produced between circuit, and thyratron trigger signal produces Q ends, the reset terminal of circuit
Master control system is connected to by emitting optical fiber respectively, master control system is also produced by emitting optical fiber with thyratron trigger signal
Circuit is connected.
Claims (1)
1. a kind of thyratron detection being applied in high-tension circuit and protection system, include thyratron, the control gate of thyratron
Pole produces circuit to be connected with thyratron trigger signal, and two fire ends of thyratron connect a heating power supply, its feature respectively
It is：A two heating power supplies difference protection circuit in parallel, two protection circuits include a current transformer, electricity respectively
An electric capacity is connected between the other two ends of current transformer, one end of electric capacity is connected by node ground connection, the other end by node
The electrode input end of amplifier, the negative input ground connection of amplifier, and lead between the output end and negative input of amplifier
Cross feedback resistance feedback link, the electrode input end of the output end connection first via comparator of amplifier, the second road comparator
Negative input, the output end of two-way comparator accesses two inputs with door, the two of two protection circuits with the output end of door
The 3rd and door are accessed, the 3rd accesses the D ends of d type flip flop with the output end of door, and the CLK ends of d type flip flop are connected by emitting optical fiber
To between control gate and thyratron trigger signal the generation circuit of thyratron, thyratron trigger signal produces the Q ends of circuit, answers
Position end is connected to master control system by emitting optical fiber respectively, and master control system is also by emitting optical fiber and thyratron trigger signal
Produce circuit connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710019859.0A CN106707157B (en) | 2017-01-11 | 2017-01-11 | Thyristor detection and protection system applied to high-voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710019859.0A CN106707157B (en) | 2017-01-11 | 2017-01-11 | Thyristor detection and protection system applied to high-voltage circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106707157A true CN106707157A (en) | 2017-05-24 |
| CN106707157B CN106707157B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710019859.0A Active CN106707157B (en) | 2017-01-11 | 2017-01-11 | Thyristor detection and protection system applied to high-voltage circuit |
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| Country | Link |
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| CN (1) | CN106707157B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115436693A (en) * | 2022-08-22 | 2022-12-06 | 中国科学院合肥物质科学研究院 | Voltage detection device and method for judging whether high voltage of input end exceeds preset value |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB868369A (en) * | 1958-12-05 | 1961-05-17 | Secr Aviation | Improvements in or relating to eddy-current heating generators |
| EP0480864A2 (en) * | 1990-10-08 | 1992-04-15 | Pbi Development A/S | A circuit for controlling the thyratron in a pulse-controlled metal vapour laser |
| CN200941113Y (en) * | 2006-06-27 | 2007-08-29 | 南阳防爆集团有限公司 | Multipurpose pulse voltage tester |
| CN102253331A (en) * | 2011-04-19 | 2011-11-23 | 株洲变流技术国家工程研究中心有限公司 | Method and board for photoelectric trigger detection based on parallel thyristors |
| CN206411232U (en) * | 2017-01-11 | 2017-08-15 | 中国科学院合肥物质科学研究院 | A kind of thyratron detection being applied in high-tension circuit and protection system |
-
2017
- 2017-01-11 CN CN201710019859.0A patent/CN106707157B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB868369A (en) * | 1958-12-05 | 1961-05-17 | Secr Aviation | Improvements in or relating to eddy-current heating generators |
| EP0480864A2 (en) * | 1990-10-08 | 1992-04-15 | Pbi Development A/S | A circuit for controlling the thyratron in a pulse-controlled metal vapour laser |
| CN200941113Y (en) * | 2006-06-27 | 2007-08-29 | 南阳防爆集团有限公司 | Multipurpose pulse voltage tester |
| CN102253331A (en) * | 2011-04-19 | 2011-11-23 | 株洲变流技术国家工程研究中心有限公司 | Method and board for photoelectric trigger detection based on parallel thyristors |
| CN206411232U (en) * | 2017-01-11 | 2017-08-15 | 中国科学院合肥物质科学研究院 | A kind of thyratron detection being applied in high-tension circuit and protection system |
Non-Patent Citations (2)
| Title |
|---|
| 孙文博等: "基于氢闸流管的高压脉冲电源", 《电源技术》 * |
| 张臻等: "高压大功率逆变电源过流保护电路的实现", 《电气自动化》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115436693A (en) * | 2022-08-22 | 2022-12-06 | 中国科学院合肥物质科学研究院 | Voltage detection device and method for judging whether high voltage of input end exceeds preset value |
| CN115436693B (en) * | 2022-08-22 | 2023-12-05 | 中国科学院合肥物质科学研究院 | Voltage detection device and method for judging whether high voltage of input end exceeds preset value |
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| Publication number | Publication date |
|---|---|
| CN106707157B (en) | 2023-04-07 |
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