CN201813165U - Intelligent control and protection compound switch - Google Patents
Intelligent control and protection compound switch Download PDFInfo
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- CN201813165U CN201813165U CN2010202846125U CN201020284612U CN201813165U CN 201813165 U CN201813165 U CN 201813165U CN 2010202846125 U CN2010202846125 U CN 2010202846125U CN 201020284612 U CN201020284612 U CN 201020284612U CN 201813165 U CN201813165 U CN 201813165U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
An intelligent control and protection compound switch includes a singlechip unit, an SCR (Silicon Controlled Rectifier) zero-crossing switching circuit, an anti-parallel one-way SCR and a protection device thereof, a magnetic latching coil driving circuit and a magnetic latching relay thereof, a full wave detection circuit and a communication circuit, wherein the SCR zero-crossing switching circuit, the magnetic latching coil driving circuit, the full wave detection circuit and the communication circuit are connected with the singlechip unit; the anti-parallel one-way SCR and the protection device thereof are connected with the SCR zero-crossing switching circuit, and the magnetic latching relay is connected with the magnetic latching coil driving circuit. The intelligent control and protection compound switch not only solves phenomena, such as breakdown of the SCR, sintering of the magnetic latching relay and the like, but also has functions of under-current and over-current protection, capacitor state diagnosis and fault reminding, which are not configured in the conventional domestic compound switches, moreover, the intelligent compound switch provided by the utility model is low in cost and wide in application prospect.
Description
Technical field
The utility model relates to a kind of switch executing element that is used for electric power system, relates in particular to a kind of intelligent control and protection combination switch.
Background technology
Combination switch is the current comparatively operating passing zero device of economic novel low-voltage reactive power compensation capacitor, so-called operating passing zero is meant voltage zero-cross input and current over-zero excision, wherein " voltage zero-cross input " be moment that supply voltage equates with condenser voltage with the capacitor connecting system, so just can not produce shove (being very short electric current of duration); " current over-zero excision " is meant that the voltage of capacitor and electric current have 90 ° phase difference, therefore disconnect in the peak value moment of a certain phase voltage (phase current of this phase voltage correspondence is zero), thereby just can realize the excision of condenser current zero passage, realize that thus the no electric arc of make and break contact disconnects.
Described combination switch is compared with switch elements such as A.C. contactor, controllable silicon or solid-state relays has bigger technological merit, its basic functional principle is that reverse-blocking tetrode thyristor is in parallel with magnetic latching relay, realize the excision of voltage zero-cross conducting (being the voltage zero-cross input) and current over-zero, make combination switch have the advantage of reverse-blocking tetrode thyristor, and during normal the connection, have the advantage that contactless contactor does not have power consumption in the moment that switches on and off.Compare with pure A.C. contactor or pure controllable silicon switching device, described combination switch has significant superiority technically, its efficient low-consume, environmental protection and energy saving, especially shove and security reliability aspect performance improve greatly.The implementation method of described combination switch is: during input at the voltage zero-cross moment zero cross fired reverse-blocking tetrode thyristor in parallel with magnetic latching relay, stable after again with magnetic latching relay adhesive conducting; And earlier magnetic latching relay is disconnected when cutting out, reverse-blocking tetrode thyristor is conducting immediately behind voltage zero-cross, avoid the magnetic latching relay off voltage to produce electric arc, reverse-blocking tetrode thyristor disconnects on current zero-crossing point at last, thereby realizes that current over-zero cuts off (being the current over-zero excision).
From the operating position that puts goods on the market at present, domestic most of producers combination switch failure rate height, job insecurity, there are a lot of potential safety hazards, mainly have phenomenons such as reverse-blocking tetrode thyristor puncture, magnetic latching relay sintering, and a lot of combination switch is after breaking down, because it is contained in the capacitor box, Nobody Knows, influenced the compensation effect of whole compensation arrangement greatly.
Failure cause is found by analysis; because load is a capacitor; it is different from resistive load; so it is different to the protected mode that reverse-blocking tetrode thyristor adopts; in addition reverse-blocking tetrode thyristor whether zero cross fired, how to control the shortest reverse-blocking tetrode thyristor ON time; these most of producers are not all found real solution; in addition in order to improve the market competitiveness; a lot of producers are in order to reduce production costs; employing does not reach the components and parts of performance index; do not take necessary software and hardware guard method, this further has influence on the quality of combination switch.In addition, because these bum combination switch costs are lower, price is also low, and this has upset the selling market of combination switch greatly, and the raising of combination switch technology is brought bigger negative effect.
Therefore, need a kind of novel combination switch, to eliminate dangerous phenomenons such as reverse-blocking tetrode thyristor punctures that existing combination switch exists, magnetic latching relay sintering, the control and the defencive function of raising combination switch effectively.
The utility model content
Technical problem to be solved in the utility model provides a kind of intelligent control and protection combination switch; this intellectuality control and protection combination switch not only can carry out operating passing zero to the capacitor in the electric power system effectively; and provide perfect defencive function; it can prevent phenomenons such as silicon control zero-cross circuits for triggering instability, controllable silicon infringement and magnetic holding contact sintering effectively, and reliable fault detection capability can be provided when described combination switch breaks down.
In order to solve above-mentioned basic problem; the utility model provides a kind of intelligent control and protection combination switch; this intellectuality control and protection combination switch comprise single machine unit; silicon control zero-cross switching circuit; inverse parallel one-way SCR and protection device thereof; retaining coil magnetic drive circuit and magnetic latching relay thereof; the all-wave testing circuit; and communicating circuit; wherein; described silicon control zero-cross switching circuit; the retaining coil magnetic drive circuit; all-wave testing circuit and communicating circuit are connected in described single machine unit; described inverse parallel one-way SCR and protection device thereof are connected in described silicon control zero-cross switching circuit, and described magnetic latching relay is connected in described retaining coil magnetic drive circuit.
Preferably, described intelligent control and protection combination switch also comprise door indicator light and the driving circuit for status display lamp that is connected in described single machine unit.
Preferably, described single machine unit is STC12C series monolithic unit.
Preferably, described communicating circuit is 485 communicating circuits.
Preferably, described silicon control zero-cross switching circuit is the silicon control zero-cross switching circuit based on the MOC3083 chip, this silicon control zero-cross switching circuit adopts the integrated circuit that has Schmidt trigger to drive the MOC3083 chip, and adopts the magnetic core inductance to connect with controllable silicon.
Preferably, described all-wave testing circuit comprises that current transformer is with each phase current state of real-time sampling.
Preferably, described single machine unit is carried out the real-time current analysis and analysis result is passed to controller or host computer by described communicating circuit.
Preferably, described door-plate drive circuit of indicator comprises ULN2003A chip and MOC3083 chip.
Problems such as silicon control zero-cross circuits for triggering instability, controllable silicon infringement, magnetic holding contact sintering have thoroughly been solved by technique scheme; increase functions such as adaptive control controllable silicon ON time, the monitoring in real time of every phase current simultaneously; make by the real-time current analysis and to control accurately and protect; and pass to controller and host computer by communicating circuit, combination switch and capacitor state information accurately are provided.Simultaneously, under failure condition, except that self can protect to greatest extent, also offer the operation information of host computer or current combination switch of controller and capacitor, so that obtain on-call maintenance and replacing during fault by communicating circuit.Therefore; intelligent combination switch of the present utility model not only solves controllable silicon and punctures; the magnetic latching relay sintering phenomenon; and having increased undercurrent, overcurrent protection, the diagnosis of capacitor state and the fault prompting function that present domestic combination switch does not have, it is intelligentized control and protection combination switch.In addition, intelligent combination switch of the present utility model is with low cost, is with a wide range of applications.Relevant other feature and advantage of the present utility model will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is used to provide further understanding of the present utility model, and constitutes the part of specification, is used from explanation the utility model with embodiment one of the present utility model, but does not constitute restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the intellectuality control of the utility model embodiment and the The general frame of protection combination switch;
Fig. 2 is the intellectuality control and the protection STC12C Series chip unit that combination switch adopted of the utility model embodiment;
Fig. 3 is the intellectuality control of the utility model embodiment and the silicon control zero-cross switching circuit of protection combination switch;
Fig. 4 is the intellectuality control of the utility model embodiment and the controllable silicon and the protection device thereof of protection combination switch;
Fig. 5 is intelligent control of the present utility model and the current waveform schematic diagram of protection combination switch when unprotect;
Fig. 6 is the intellectuality control of the utility model embodiment and the electric current all-wave testing circuit of protection combination switch;
Fig. 7 is intellectuality control and the door-plate indicator light of protection combination switch and the schematic diagram of driving circuit for status display lamp of the utility model embodiment;
Fig. 8 is the entity schematic diagram of the control circuit printed circuit board (PCB) of the utility model embodiment;
Fig. 9 is the entity schematic diagram of the combination switch power device circuit printed circuit board (PCB) of the utility model embodiment;
Figure 10 is the entity schematic diagram of 485 communication interface circuit printed circuit board (PCB)s of the utility model embodiment; And
Figure 11 is the entity schematic diagram of the drive circuit of magnetic latching relay printed circuit board (PCB) of the utility model embodiment.
Embodiment
For the ease of those skilled in the art of the present technique's understanding, be further described below in conjunction with embodiment of the present utility model and accompanying drawing.Should be understood that embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.In following description to the utility model embodiment; the description of interlock circuit only is exemplary and nonrestrictive; in technical conceive scope of the present invention; it may occur to persons skilled in the art that multiple simple deformation, the key technology of intelligent control of the present utility model and protection combination switch requires to be the syndeton of interlock circuit.
As shown in Figure 1; the utility model basic technical scheme discloses a kind of intellectuality control and protection combination switch that is used for the reactive compensation switching capacitor; this intellectuality control and protection combination switch comprise single machine unit; silicon control zero-cross switching circuit; inverse parallel one-way SCR and protection device thereof; retaining coil magnetic drive circuit and magnetic latching relay thereof; the all-wave testing circuit; and communicating circuit; wherein; described silicon control zero-cross switching circuit; the retaining coil magnetic drive circuit; all-wave testing circuit and communicating circuit are connected in described single machine unit; described inverse parallel one-way SCR and protection device thereof are connected in described silicon control zero-cross switching circuit, and described magnetic latching relay is connected in described retaining coil magnetic drive circuit.
On the basis of above-mentioned basic technical scheme, preferably, this communicating circuit can adopt 485 communicating circuits, and the operation information of current combination switch and capacitor being provided for host computer or controller by this 485 communicating circuit is so that obtain on-call maintenance and replacing during fault.Can adopt 2500V insulating power supply and optical coupling isolation circuit to guarantee the reliability of 485 communications in 485 communicating circuits, adopt ModBus agreement and host computer or controller to carry out communication, guarantee to receive and send the accuracy (the specifically entity schematic diagram of the 485 communication interface circuit printed circuit board (PCB)s that can show referring to Figure 10) of data.
In addition; preferably; intelligent control of the present utility model and protection combination switch can also comprise door-plate drive circuit of indicator and driving circuit for status display lamp, to indicate the operating state of intelligent combination switch of the present utility model by door-plate indicator light and status indicator lamp.
Describe each part and the effect thereof of intelligent control of the present utility model and protection combination switch in detail below in conjunction with accompanying drawing.
As shown in Figure 2; described single machine unit can adopt STC12C Series chip unit; the inventor has selected for use up-to-date 1T enhancement mode 8051 single-chip microcomputers of STC as microprocessor; it can guarantee higher antijamming capability and reliability under lower price; by being carried out software programming, single-chip microcomputer carries out switching controllable silicon and magnetic latching relay; and carry out switching state analysis, condenser capacity analysis, overcurrent, undercurrent, phase shortage analysis etc., as break down and will combination switch and electric capacity be carried out maximum safety protection by sample rate current.In addition, under optimal way, this single machine unit is carried out communication by 485 communicating circuits and controller, receive the switching signal and send operating state (operating current, capacitor state and some fault indices etc.) so that on controller, just can observe the operating state of combination switch and capacitor.
As shown in Figure 3, adopt MOC3083 to control the conducting that is higher than 1600v inverse parallel one-way SCR in the silicon control zero-cross switching circuit and close, because MOC3083 adopts voltage over zero to trigger the light controllable silicon, withstand voltage have only 800V, so adopt two MOC3083 series connection, and come the off-state of two MOC3083 of balance withstand voltage by grading resistor, resistance is selected unsuitable excessive, can not be too small, too small off-state power consumption is big, excessive not only equal pressure reduction, and also 10ms does not trigger fault can cause excision the time, this can bring fatal damage to magnetic latching relay, finds to adopt 1M left and right sides 0.5W resistance best in the experiment.Drive the integrated circuit that MOC3083 employing 7414 has Schmidt trigger, can prevent well that the fluctuation of combination switch DC power supply from bringing false triggering MOC3083 phenomenon.
There are a lot of combination switches to adopt the bidirectional triode thyristor series connection at present, this is very harmful a kind of way, no matter withstand voltage, the anti-stream of bidirectional triode thyristor, opposing change in voltage, electric current change that all be not so good as the inverse parallel one-way SCR good, and we have customized the controllable silicon of high withstand voltage, high voltage variation rate, high current changing rate with domestic manufacturer.But because load is a capacitor, an one-way SCR carries out the transition to cut-off state (as shown in Figure 5) from conducting when the change of current, inner excess electron can form bigger reverse current under the reverse voltage pulling, very easily cause the controllable silicon infringement, the inventor has made very high magnetic core inductance and the controllable silicon series connection (as shown in Figure 4) of cost performance through large scale experiment, has solved controllable silicon infringement problem well.
As shown in Figure 6; electric current all-wave testing circuit is used for detecting in real time the operating state of combination switch and defencive function to greatest extent is provided; wherein high precision current transformer comes each phase current state of real-time sampling; the all-wave testing circuit can improve the detection performance; by single-chip microcomputer sample rate current is analyzed; obtain controllable silicon, relay running status, operating current, condenser capacity, whether go out an abnormal conditions etc.The more important thing is; the all-wave testing circuit detects three-phase current; supply with single-chip microcomputer and carry out real-time analysis; obtain controllable silicon, magnetic maintenance operating state, capacitance and electric current information such as (normally, overcurrent, undercurrent and phase shortages); and make best control and protection employing, adopt the life-span that has prolonged indicator light.In addition, because under a lot of situation, combination switch or capacitor have been broken, Nobody Knows.And this combination switch can pass to controller and host computer by 485 communication interfaces with analysis result, can make the staff well find fault and repairs or replaces.Because condenser capacity can constantly decay along with the passing of service time, and combination switch constantly sends to controller with up-to-date capacity data by capacity analysis, make that on the one hand controller obtains condenser capacity the most accurately in addition, improved compensation precision.Therefore, under failure condition, except that self can protect to greatest extent, the operation information of current combination switch and capacitor being provided for host computer or controller by this 485 communicating circuit also was so that obtain on-call maintenance and replacing during fault.
As shown in Figure 7, adopt ULN2003A to add MOC3083 in the external 220V door-plate drive circuit of indicator and drive the door-plate indicator light, avoided adopting relay can cause the reduction in indicator light life-span, we, guarantee that indicator light crossing under the nought state conducting and closing, has improved the useful life of door-plate indicator light.In addition, this figure has also shown the status indicator lamp on the combination switch, and it is mainly used to indicate the operating state of current combination switch, and green light is in the not "on" position that powers on, and red light is in the "on" position that powers on, and lamp does not work and is in malfunction.
The retaining coil magnetic drive circuit can adopt domestic Belling 8023 dedicated magnetic latching relay chip for driving (the entity schematic diagram of the drive circuit of magnetic latching relay printed circuit board (PCB) that shows referring to Figure 11), it has simplified the driving design, improve reliability, can guarantee effective closed and disconnected magnetic latching relay in the 50ms.Magnetic latching relay can adopt the special 902 serial magnetic latching relays of domestic bass, as long as silicon control zero-cross conducting when guaranteeing the closed and disconnected magnetic latching relay, can reach the useful life of magnetic latching relay more than 100,000 times, if but controllable silicon does not have under conducting or the incomplete conducting, closed magnetic latching relay under the rated current, the silver tipped contacts that time will occur up to a hundred after tested are burnt or be sticked together, so use magnetic latching relay must guarantee the controllable silicon operate as normal.
Operation principle of the present utility model is after powering on, three-phase current enters monitor state immediately, and each millisecond is analyzed the primary current situation, whether normally all work state information is sent to controller, so that controller carries out record to combination switch ruuning situation, so that make optimum switching scheme.At first voltage zero-cross triggers controllable silicon behind the input signal that receives self-controller, and judges by current monitoring whether electric current is normal, as normally, then drops into magnetic latching relay.Behind the excision signal that receives self-controller, at first start thyristor gating circuit, excise magnetic latching relay then, make the controllable silicon current over-zero close again.No matter combination switch is in closure or off-state, and current monitoring is carrying out always, as abnormal conditions then occur, and combination switch all will enter guard mode.
In addition, Fig. 8 and Fig. 9 have also shown the entity schematic diagram of control circuit printed circuit board (PCB) of the utility model combination switch and the entity schematic diagram of power device circuit printed circuit board (PCB), the link position that has wherein shown associated lead in detail is for those skilled in the art's reference.
Need to prove that each the concrete technical characterictic described in above-mentioned embodiment can carry out combination in any by any suitable manner, it falls within the scope disclosed in the utility model equally.In addition, also can carry out combination in any between the various execution mode of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Below describe preferred implementation of the present utility model in conjunction with the accompanying drawings in detail; but; the utility model is not limited to the detail in the above-mentioned execution mode; in technical conceive scope of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection range of the present utility model.Protection range of the present utility model is defined by the claims.
Claims (8)
1. an intellectuality is controlled and the protection combination switch; it is characterized in that; this intellectuality control and protection combination switch comprise single machine unit; silicon control zero-cross switching circuit; inverse parallel one-way SCR and protection device thereof; retaining coil magnetic drive circuit and magnetic latching relay thereof; all-wave testing circuit and communicating circuit; wherein; described silicon control zero-cross switching circuit; the retaining coil magnetic drive circuit; all-wave testing circuit and communicating circuit are connected in described single machine unit; described inverse parallel one-way SCR and protection device thereof are connected in described silicon control zero-cross switching circuit, and described magnetic latching relay is connected in described retaining coil magnetic drive circuit.
2. intelligent control according to claim 1 and protection combination switch is characterized in that, described intelligent control and protection combination switch also comprise door indicator light and the driving circuit for status display lamp that is connected in described single machine unit.
3. intelligent control according to claim 1 and protection combination switch is characterized in that described single machine unit is STC12C series monolithic unit.
4. intelligent control according to claim 1 and protection combination switch is characterized in that described communicating circuit is 485 communicating circuits.
5. intelligent control according to claim 1 and protection combination switch; it is characterized in that; described silicon control zero-cross switching circuit is the silicon control zero-cross switching circuit based on the MOC3083 chip; this silicon control zero-cross switching circuit adopts the integrated circuit that has Schmidt trigger to drive the MOC3083 chip, and adopts the magnetic core inductance to connect with controllable silicon.
6. intelligent control according to claim 1 and protection combination switch is characterized in that described all-wave testing circuit comprises that current transformer is with each phase current state of real-time sampling.
7. intelligent control according to claim 1 and protection combination switch is characterized in that described single machine unit is carried out the real-time current analysis and analysis result is passed to controller or host computer by described communicating circuit.
8. intelligent control according to claim 2 and protection combination switch is characterized in that described door-plate drive circuit of indicator comprises ULN2003A chip and MOC3083 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202846125U CN201813165U (en) | 2010-08-03 | 2010-08-03 | Intelligent control and protection compound switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202846125U CN201813165U (en) | 2010-08-03 | 2010-08-03 | Intelligent control and protection compound switch |
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| Publication Number | Publication Date |
|---|---|
| CN201813165U true CN201813165U (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202846125U Expired - Fee Related CN201813165U (en) | 2010-08-03 | 2010-08-03 | Intelligent control and protection compound switch |
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| CN (1) | CN201813165U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730901A (en) * | 2014-01-21 | 2014-04-16 | 成都星宇节能技术股份有限公司 | Carrier communication combined switch |
| CN104678860A (en) * | 2015-02-11 | 2015-06-03 | 哈尔滨工业大学 | CPLD-based protection relay in AC and open-phase protection system |
| CN109388076A (en) * | 2017-08-02 | 2019-02-26 | 珠海市伏安达电子科技有限公司 | Intelligent contactless flame-proof switch |
-
2010
- 2010-08-03 CN CN2010202846125U patent/CN201813165U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730901A (en) * | 2014-01-21 | 2014-04-16 | 成都星宇节能技术股份有限公司 | Carrier communication combined switch |
| CN104678860A (en) * | 2015-02-11 | 2015-06-03 | 哈尔滨工业大学 | CPLD-based protection relay in AC and open-phase protection system |
| CN104678860B (en) * | 2015-02-11 | 2017-05-24 | 哈尔滨工业大学 | CPLD-based protection relay in AC and open-phase protection system |
| CN109388076A (en) * | 2017-08-02 | 2019-02-26 | 珠海市伏安达电子科技有限公司 | Intelligent contactless flame-proof switch |
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Legal Events
| 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 |
Granted publication date: 20110427 Termination date: 20150803 |
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| EXPY | Termination of patent right or utility model |