CN2513117Y - Photoelectric converting circuit of thyristor breakdown detection - Google Patents
Photoelectric converting circuit of thyristor breakdown detection Download PDFInfo
- Publication number
- CN2513117Y CN2513117Y CN 01250875 CN01250875U CN2513117Y CN 2513117 Y CN2513117 Y CN 2513117Y CN 01250875 CN01250875 CN 01250875 CN 01250875 U CN01250875 U CN 01250875U CN 2513117 Y CN2513117 Y CN 2513117Y
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- resistance
- circuit
- connects
- thyristor
- ground connection
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- Expired - Fee Related
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Abstract
The utility model relates to a photoelectric converting circuit of thyristor breakdown detection which is used in the high voltage static type dynamics reactive power compensating device. The utility model is characterized in that the circuit utilizes the switching characteristic of the crystal triode, making the amplificatory electrical signal output to the electric light emission head, and output after being transited into a light signal. The voltage signal inputting into the input end is transferred to the integrated circuit IC(4) end, and the electric potential of the integrated circuit IC(4) end is decided by the electric potential of the input signal and the partial pressure resistance R1, the electric potential at the IC(5) end is decided by the power supply VCC, the pressure resistance R2 and R3 and the adjustable resistance RW, through adjusting the adjustable resistance RW, the numerical value is confirmed by hand, achieving the required exact numerical value when designing the circuit.
Description
(1) technical field
The utility model is the thyristor puncture detection electro-optical conversion circuit that is applied to carry out in the high voltage static type dynamic reactive power compensation equipment electric light conversion.
(2) background technology
The effect of silent oscillation dynamic reactive power compensation equipment (patent No. 00212387.8) is effectively to improve electric power system stability, reduces the circuit energy loss, the system transmissions that increases electric power ability; Energy rapid adjustment reactive power improves the power factor of electrical network and load, and can effectively suppress harmonic wave to prevent its harm.The silent oscillation dynamic reactive power compensation equipment is mainly used in extra-high voltage transmission and the more serious electricity consumption occasion of electric arc furnaces, large-sized rolling mills and other reactive power impact, also is applicable to simultaneously high-power single-phase load, as electric locomotive etc.
(3) summary of the invention
The purpose of this utility model provides a kind of being applied in the high voltage static type dynamic reactive power compensation equipment, and thyristor punctures testing circuit to the thyristor between the control system and punctures the detection electro-optical conversion circuit, carries out the electric light conversion.
Thyristor punctures inspection side electro-optical conversion circuit, its wiring diagram as shown in Figure 1, thyristor punctures integrated circuit (IC) (4) end in this circuit of detection photoelectric switching circuit output termination, middle through resistance R 1 ground connection, IC (5) end is connected in the bleeder circuit branch road between the resistance R 2 and R3, the resistance R 3 also ground connection of connecting with adjustable resistance RW; Resistance R 2 be connected in power supply VCC (+5V), and between R2 and VCC, successively be connected capacitor C and ground connection, connect IC (3) end, connect resistance R 4, and R4 is connected to IC (2) end again, connection triode V1 emitter, connect resistance R 8, and R8 is connected to photoemission head HF anode again.Integrated circuit (IC) (2) end connects triode V1 base stage through resistance R 5, V1 collector parallel resistance R6, R7,
And R6 one end ground connection, R7 one end connect triode V2 base stage, V2 grounded emitter, V2
Collector connects photoemission head HF negative electrode, and the HF output terminal connects optical fiber.
Its principle of work is:
This circuit is a switching characteristic of utilizing transistor, electric signal is amplified input to the electric light emitting head, changes light signal output again into.Input end input voltage signal to integrated circuit (IC) (4) is held, the current potential height of IC (4) end is by the size decision of the current potential and the divider resistance R1 of input signal, IC (5) terminal potential height is by power supply VCC, divider resistance R2, R3, adjustable resistance RW decision, by regulating adjustable resistance RW, manually set definite numerical value, needed concrete numerical value when reaching this circuit design.
When IC (4) terminal potential was lower than (5) terminal potential, IC (2) held output one high level signal input triode V1, and at divider resistance R4, under the effect of R5, V1 is in by strong attitude, no-output at this moment.If IC (4) terminal potential is when being higher than (5) terminal potential, IC (2) end output low level signal makes triode V1, and V2 is in the full conducting state of closing, this moment power supply VCC (+5V) through resistance R 8, electric light emitting head HF, triode V2 collector, V2 grounded emitter.Electric light emitting head HF changes electric signal into light signal output, finishes the work of this circuit.The photosignal of output reaches control system through optical fiber, makes protection system carry out work, in case main circuit damages.
When resistance R 1 is fixed value, the height of IC (4) terminal potential is decided by the size of input signal, and the input signal current potential is to damage how much deciding of quantity by thyristor, and output signal current potential of every damage increases progressively a determined value, and IC (4) terminal potential is raise.What damage as for thyristor in the thyristor inverse parallel unit and can only make IC (4) end (5) end output high level signal relatively, the safe quantity of thyristor when depending on main circuit design.Only be generally 2-3, when puncture was lower than this quantity as thyristor, this circuit did not have light signal to export control system to, the main circuit operate as normal, in case thyristor damages 3, then this circuit output light signal is to control system, main circuit is quit work, guarantee that device is not damaged.
(4) description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Among the figure: HF: the electric light emitting head
R1-R8: resistance
RW: adjustable resistance
V1.V2: transistor
IC: integrated circuit
The VCC:+5V power supply
(5) embodiment
In the 35KV high voltage static type dynamic reactive power compensation equipment, thyristor punctures testing circuit to adopting this circuit to carry out the electric light conversion between the control system.This circuit is a single-phase circuit, because device is three-phase, detects electro-optical conversion circuit so the thyristor that should have three identical circuit to form this device punctures.
Claims (1)
1. thyristor punctures the detection electro-optical conversion circuit, it is characterized in that: thyristor punctures integrated circuit (IC) (4) end in this circuit of detection photoelectric switching circuit output termination, middle through resistance R 1 ground connection, IC (5) end is connected in the bleeder circuit branch road between the resistance R 2 and R3, the resistance R 3 also ground connection of connecting with adjustable resistance RW; Resistance R 2 is connected in power supply VCC, and successively is connected capacitor C and ground connection between R2 and VCC, connects IC (3) end, connects resistance R 4, and R4 is connected to IC (2) end again, connects triode V1 emitter, connect resistance R 8, and R8 is connected to photoemission head HF anode again; Integrated circuit (IC) (2) end connects triode V1 base stage, V1 collector parallel resistance R6, R7 through resistance R 5, and R6 one end ground connection, R7 one end connect triode V2 base stage, V2 grounded emitter, the V2 collector connects photoemission head HF negative electrode, and the HF output terminal connects optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01250875 CN2513117Y (en) | 2001-09-27 | 2001-09-27 | Photoelectric converting circuit of thyristor breakdown detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01250875 CN2513117Y (en) | 2001-09-27 | 2001-09-27 | Photoelectric converting circuit of thyristor breakdown detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2513117Y true CN2513117Y (en) | 2002-09-25 |
Family
ID=33660937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01250875 Expired - Fee Related CN2513117Y (en) | 2001-09-27 | 2001-09-27 | Photoelectric converting circuit of thyristor breakdown detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2513117Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623947A (en) * | 2012-03-29 | 2012-08-01 | 临安亿安电力电子科技有限公司 | Leakage protector with phase line switching function |
| CN101872967B (en) * | 2009-04-24 | 2013-10-16 | 深圳市科陆变频器有限公司 | IGBT (Insulated Gate Bipolar Transistor) breakdown protection circuit |
-
2001
- 2001-09-27 CN CN 01250875 patent/CN2513117Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872967B (en) * | 2009-04-24 | 2013-10-16 | 深圳市科陆变频器有限公司 | IGBT (Insulated Gate Bipolar Transistor) breakdown protection circuit |
| CN102623947A (en) * | 2012-03-29 | 2012-08-01 | 临安亿安电力电子科技有限公司 | Leakage protector with phase line switching function |
| CN102623947B (en) * | 2012-03-29 | 2015-09-23 | 临安亿安电力电子科技有限公司 | A kind of earth leakage protective device with phase line handoff functionality |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |