CN201584741U - Thyristor automatic reclosing switch - Google Patents
Thyristor automatic reclosing switch Download PDFInfo
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- CN201584741U CN201584741U CN2009201530349U CN200920153034U CN201584741U CN 201584741 U CN201584741 U CN 201584741U CN 2009201530349 U CN2009201530349 U CN 2009201530349U CN 200920153034 U CN200920153034 U CN 200920153034U CN 201584741 U CN201584741 U CN 201584741U
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- automatic reclosing
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Abstract
A thyristor automatic reclosing switch comprises a thyristor inverse-parallel main circuit and a single chip microcomputer control system. The thyristor inverse-parallel main circuit belongs to a non-contact electronic power element, the single chip microcomputer control system comprises a single chip microcomputer chip and a peripheral circuit, and the peripheral circuit comprises a power supply signal sampling circuit, a single-chip switch power supply forming circuit, a load signal sampling circuit, a switch state detection circuit, a trigger circuit, an alarm output interface, a dry contact output circuit and the like. The thyristor automatic reclosing switch utilizes the modern electric power electronic technology and the microcomputer control technology to realize non-contact make and break functions, can on-line detect the power supply, load and own failure, can be used for power distribution of unattended service rooms in industries of telecom, mobile communication, electric power, broadcast and television, traffic and the like, and is particularly adaptable to mountains and remote regions. Besides, by aid of the non-contact automatic reclosing technology, service room maintenance work load of personnel can be reduced, communication equipment is guaranteed to recover to normal operation and secondary loss caused by power grid failure is reduced.
Description
Technical field
The present invention relates to a kind of automatic reclosing switch of thyristor, particularly relate to a kind of monolithic processor controlled thyristor inverse parallel automatic reclosing non-contact type switch.
Background technology
Up to now; external Italy, domestic Suzhou City, Jiangsu Province, GuangZhou, Guangdong Province city all have the manufacturer that auto reclosing switch is provided; or title three-phase automatic reclosing earth leakage circuit-breaker; its common feature is to utilize the mechanical automation principle; in conjunction with the product of modern electronic technology, its structure still belongs to chattering type, its common drawback just the chattering type structure bring cover end; the contact capacity is restricted, and contact electric arc and spark are that particular application is brought potential safety hazard.
Summary of the invention
The object of the present invention is to provide a kind of automatic reclosing switch of thyristor, it is that employing is monolithic processor controlled intelligent, by the auto reclosing switch of thyristor inverse parallel as contactless switch element.Trend such as thyristor reclosing on-off principle block diagram (1) that annexation between each element circuit and signal transmit.
The objective of the invention is to realize by following manner, automatic reclosing switch of thyristor of the present invention, comprise SCR (thyristor) inverse parallel main circuit (3) and single-chip computer control system, single-phase-two-wire (or three-way) system, main circuit comprises a pair of anti-parallel thyristor power component; Three-phase and four-line (or five lines) system, main circuit comprises three pairs of anti-parallel thyristor power components, and thyristor inverse parallel main circuit is the non-contact type switch element; Single-chip computer control system comprises singlechip chip MCU (2) (PIC16F690) and peripheral circuit; Peripheral circuit comprises: power signal sampling circuit (4), single-chip switching power supply form circuit (5), load signal sample circuit (6), on off state testing circuit (7), circuits for triggering (8), warning output interface circuit (9), dry contact output circuit (10).
Automatic reclosing switch of thyristor of the present invention, wherein single-chip switching power supply forms circuit (5) by mains-supplied, forms singlechip chip MCU (2) and the required working power of peripheral circuit thereof.
Automatic reclosing switch of thyristor of the present invention, wherein power signal sampling circuit (4) signal that provides and the fiducial value that prestores compares, through singlechip chip MCU (2) logic determines be: malfunction such as electrical network phase shortage, decompression, under-voltage, overvoltage, MCU (2) sends control command, stop paying out triggering signal, close SCR inverse parallel main circuit (3), the automatic reclosing switch of thyristor automatic brake separating.
Automatic reclosing switch of thyristor of the present invention, wherein load signal sample circuit (6) signal that provides and the fiducial value that prestores compares, through MCU (2) logic determines be: malfunctions such as load overcurrent, short circuit, electric leakage, MCU (2) sends control command, stop paying out triggering signal, close SCR inverse parallel main circuit (3), the automatic reclosing switch of thyristor automatic brake separating.
Automatic reclosing switch of thyristor of the present invention, wherein the signal that provides of power signal sampling circuit (4) and load signal sample circuit (6) is discerned and is judged as through MCU (2): electric network fault disappears or load faulty is eliminated, MCU (2) sends the triggered as normal signal, open SCR inverse parallel main circuit (3), the automatic reclosing switch of thyristor automatic reclosing.
Automatic reclosing switch of thyristor of the present invention, the signal or MCU (2) self working state abnormal that provide of power signal sampling circuit (4), load signal sample circuit (6) or on off state testing circuit (7) wherein, MCU (2) is through warning output interface circuit (9) output alarm buzzerphone:
Front end power network (civil power) fault---4S rings one;
Rear end load faulty---1S rings one:
" switch " faults itself---0.5S rings one;
The rear end load short circuits---yowl!
Automatic reclosing switch of thyristor of the present invention, wherein the signal that provides of on off state testing circuit (7) diagnoses out SCR inverse parallel main circuit (3) that fault or MCU (2) self working state abnormal are arranged, MCU (2) all self diagnosis is the automatic reclosing switch of thyristor fault, MCU (2) stops paying out triggering signal, SCR inverse parallel main circuit (3) automatic brake separating, MCU (2) starts safe redundancy backup passage K2 outside this switch through dry contact output circuit (10) output control signal, makes load obtain normal power supply continuously.
Automatic reclosing switch of thyristor of the present invention, be with monolithic processor controlled thyristor inverse parallel automatic reclosing noncontacting switch, overcome the hidden danger of contact electric arc and spark, adopt the main building block of homemade anti-parallel thyristor power component at present as automatic reclosing switch of thyristor, its capacity has reached 500A, 1800V, from now on along with the raising of thyristor power component technology and manufacture level, the capacity of automatic reclosing switch of thyristor also can correspondingly improve, development along with power electronic technology, the non-contact type auto reclosing switch replaces chattering type reclosing switch, is trend of the times.
Major advantage of the present invention is that it has traditional switching function, but does not have parts such as tangible disconnecting link or contact, belongs to the non-contact type switch element.The present invention has adopted modern power electronics technology and Control Technique of Microcomputer to realize that band carries " branch " and " closing " lock function, and can online detection front end electrical network (mains supply) state and rear end load faulty.The present invention possesses simultaneously: (1) Fault Identification; (2) faulty indication; (3) fault detect and judgement before the reclosing; (4) show the line voltage value in real time; (5) can store historical failure information; (6) can be with the warning of different sound equipment differentiation power failures, load faulty, switch faults itself.When automatic reclosing switch of thyristor has fault, can start the safe redundancy backup passage K2 outside this switch automatically, make load obtain normal power supply continuously.
The unattended equipment room distribution of industries such as the present invention can be used for telecommunications, moves, electric power, broadcasting and TV, traffic, especially it is regional that The distance is far and the mountain is high, the non-contact type automatic reclosing can reduce the maintenance workload of personnel to machine room, ensure that communication equipment in time recovers operate as normal, reduce the quadratic loss of electric network fault.
Description of drawings
Fig. 1 is the automatic reclosing switch of thyristor theory diagram
Fig. 2 is singlechip chip MCU-PIC16F690 pin and peripheral circuit diagram thereof
Fig. 3 is three-phase and four-line (or five a lines) thyristor inverse parallel main circuit
Fig. 4 is the power signal sampling circuit
Fig. 5 is that single-chip switching power supply forms circuit
Fig. 6 is the load signal sample circuit
Fig. 7 is the on off state testing circuit
Fig. 8 is circuits for triggering
Fig. 9 is the warning output circuit
Figure 10 is the dry contact output circuit
Embodiment
Shown in theory diagram (1), automatic reclosing switch of thyristor of the present invention comprises following 9 strong and weak electricity assemblies and constitutes, and the main body SCR inverse parallel main circuit of the automatic reclosing switch of thyristor in the theory diagram is contactless switching circuit.Other 8 assemblies are: MCU chip (2), power signal sampling circuit (4), single-chip switching power supply form circuit (5), load signal sample circuit (6), on off state testing circuit (7), circuits for triggering (8), warning output circuit (9), dry contact output circuit (10).
Embodiment be with from singlechip chip MCU (2) to dry contact output circuit (10) totally 8 light current assemblies be installed on the printed circuit board, (perhaps the present invention has formed and has criticized when producing, can be integrated into chip piece IC1) this printed circuit board (PCB) is fixed on by the radiator of SCR inverse parallel main circuit (3), and is connected with SCR inverse parallel main circuit (3) by connector; SCR inverse parallel main circuit (3) belongs to contactless power electronic circuit, must be supporting with it according to load size and the well-designed radiator of character (general-purpose device does not belong to the present invention's row); Inverse parallel main circuit (3) is installed in the radiator top with four metal bolts; MCU chip (2) and printed circuit board (PCB) light current component placements such as (or chip IC 1) connects with the power electronic main circuit at radiator top by connector in the metallic shield box of radiator side.
The following describes the automatic reclosing switch of thyristor course of work of the present invention.
Three-phase and four-line (or five lines) or single-phase three wire system with the course of work that A is example explanation automatic reclosing switch of thyristor mutually, are talked about from most typical grid power blackout state.
By accompanying drawing (3) as can be known, work as grid power blackout, UA=0 does not have potential difference between the anode of SCR1, SCR2 in the SCR inverse parallel main circuit and the negative electrode, automatically ends, and is equivalent to the automatic reclosing switch of thyristor automatic brake separating, load RL dead electricity.
When electric network fault is got rid of, after electrical network send electricity again, singlechip chip MCU (2) obtains working power through single-chip switching power supply (5), passing through power signal sampling circuit (4), load signal sample circuit (6), on off state testing circuit (7) respectively detects power supply status, load condition, reclosing switch oneself state respectively and whether meets the reclosing condition, if meet, singlechip chip MCU (2) carves at a time to A phase circuits for triggering (8) input triggering signal, make A phase anti-parallel thyristor open-minded, realize automatic reclosing.
After the automatic reclosing, (several days switch operate as normal some time, several weeks, several months ...) arrive certain constantly, the signal that on off state testing circuit (7) provides is diagnosed as SCR inverse parallel main circuit (3) fault or singlechip chip MCU (2) self working state abnormal, MCU (2) all self diagnosis is the automatic reclosing switch of thyristor fault, MCU (2) control system is stopped paying out triggering signal, the automatic reclosing switch of thyristor automatic brake separating, simultaneously, MCU (2) starts the redundancy backup passage K outside this switch through dry contact output circuit (10) output control signal
2, make load obtain normal power supply continuously.
After the automatic reclosing, the switch operate as normal some time arrives certain constantly, singlechip chip MCU (2) detects load fault (overcurrent, short circuit, electric leakage etc.), then MCU (2) control system is stopped paying out triggering signal, the automatic reclosing switch of thyristor automatic brake separating, avoid load faulty to enlarge, even cause fire, cause heavy economic losses and personal injury.
After the automatic reclosing, the switch operate as normal some time arrives certain constantly, as electric network fault (decompression, under-voltage, overvoltage, phase shortage etc.), can stop triggering signal, automatic reclosing switch of thyristor automatic brake separating, the infringement of avoiding bad line voltage that load is caused after MCU (2) diagnosis.
The Single-chip Controlling process of finishing automatic reclosing switch of thyristor of the present invention is as follows:
1. power system restoration normal power supply, single-chip switching power supply forms working power, and MCU (2) begins software program for execution;
2. initializing set;
3.MCU (2) executing state detects;
4.MCU (2) carry out accident analysis;
5. load faulty (Y) in this way, MCU (2) closes triggering signal, and switch is in gate-dividing state; As not being (N), for reclosing has been prepared loading condition;
6. switch faults itself (Y) in this way, MCU (2) closes triggering signal, and switch is in gate-dividing state; Under the condition of electrical network fault-free (N), load fault-free (N), start safe redundancy backup passage K2; As not being (N), for reclosing has been prepared the switch self-condition;
7. electric network fault (Y) in this way, switch is in gate-dividing state; As not being (N), output triggered as normal signal;
8. convergence switch self fault-free, load fault-free, three conditions of power supply fault-free possess entirely, and automatic reclosing switch of thyristor is automatic reclosing, and switch top LED shows the line voltage value, and switch enters normal operating condition.
9. no matter any one breaks down three conditions, and automatic reclosing switch of thyristor can automatic brake separating.
Claims (8)
1. automatic reclosing switch of thyristor, the single-chip computer control system that comprises contactless thyristor inverse parallel main circuit and the automatic divide-shut brake of control main circuit, it is characterized in that: comprising SCR thyristor inverse parallel main circuit (3), is the main body that replaces the contactless electronic beam switch of mechanical contact switch; The single-chip computer control system that the control main circuit divides automatically, closes a floodgate comprises singlechip chip MCU (2); And SCM peripheral control circuit: power signal sampling circuit (4), single-chip switching power supply form circuit (5), load signal sample circuit (6), on off state testing circuit (7), circuits for triggering (8), warning output interface circuit (9), dry contact output circuit (10).
2. automatic reclosing switch of thyristor according to claim 1 is characterized in that: SCR inverse parallel main circuit (3) is the non-contact type power electronic switch assembly.
3. automatic reclosing switch of thyristor according to claim 2 is characterized in that: form working power confession singlechip chip MCU (2) and the peripheral circuit electricity consumption thereof that circuit (5) forms by mains supply through single-chip switching power supply.
4. automatic reclosing switch of thyristor according to claim 3, it is characterized in that: power signal sampling circuit (4) adopt the mains supply signal compare with the fiducial value that prestores, make logic determines and send the power failure alarm signal through singlechip chip MCU (2), and instruction automatic reclosing switch of thyristor automatic brake separating.
5. automatic reclosing switch of thyristor according to claim 4, it is characterized in that: load signal sample circuit (6) adopt load signal compare with the fiducial value that prestores, make logic determines through singlechip chip MCU (2), and send the load faulty alarm signal, and instruction automatic reclosing switch of thyristor automatic brake separating.
6. automatic reclosing switch of thyristor according to claim 5, it is characterized in that: the signal that power signal sampling circuit (4) and load signal sample circuit (6) provide is discerned and is judged as through singlechip chip MCU (2): electric network fault disappears or load faulty elimination singlechip chip MCU (2) sends the triggered as normal signal, open SCR inverse parallel main circuit (3), the automatic reclosing switch of thyristor automatic reclosing.
7. automatic reclosing switch of thyristor according to claim 6, it is characterized in that: judge that according to the signal that power signal sampling circuit (4), load signal sample circuit (6) or on off state testing circuit (7) provide fault or singlechip chip MCU (2) self working state abnormal are arranged, singlechip chip MCU (2) is through warning output interface circuit output buzzing alarm signal.
8. automatic reclosing switch of thyristor according to claim 7, it is characterized in that signal or singlechip chip MCU (2) self working state abnormal that on off state testing circuit (7) provides, singlechip chip MCU (2) all self diagnosis is the automatic reclosing switch of thyristor fault, singlechip chip MCU (2) stops paying out triggering signal, SCR inverse parallel main circuit (3) automatic brake separating, singlechip chip MCU (2) starts the redundancy backup passage K outside this switch through dry contact output circuit (10) output control signal
2, make load obtain normal power supply continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201530349U CN201584741U (en) | 2009-05-18 | 2009-05-18 | Thyristor automatic reclosing switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201530349U CN201584741U (en) | 2009-05-18 | 2009-05-18 | Thyristor automatic reclosing switch |
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| Publication Number | Publication Date |
|---|---|
| CN201584741U true CN201584741U (en) | 2010-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201530349U Expired - Fee Related CN201584741U (en) | 2009-05-18 | 2009-05-18 | Thyristor automatic reclosing switch |
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| CN (1) | CN201584741U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895086A (en) * | 2009-05-18 | 2010-11-24 | 叶晓燕 | Automatic reclosing switch of thyristor |
-
2009
- 2009-05-18 CN CN2009201530349U patent/CN201584741U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895086A (en) * | 2009-05-18 | 2010-11-24 | 叶晓燕 | Automatic reclosing switch of thyristor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20100915 Termination date: 20160518 |