CN203193282U - Intelligent combined-type anti-harmonic capacitor - Google Patents
Intelligent combined-type anti-harmonic capacitor Download PDFInfo
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- CN203193282U CN203193282U CN2013202161526U CN201320216152U CN203193282U CN 203193282 U CN203193282 U CN 203193282U CN 2013202161526 U CN2013202161526 U CN 2013202161526U CN 201320216152 U CN201320216152 U CN 201320216152U CN 203193282 U CN203193282 U CN 203193282U
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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
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The utility model discloses an intelligent combined-type anti-harmonic capacitor. A signal acquisition circuit of the capacitor is electrically connected to an input end of a signal amplification rectifier circuit. An output end of the signal amplification rectifier circuit is electrically connected to an input end of a central processor. A temperature sensing amplifier is electrically connected to a temperature signal input end of the central processor. An input end of a power switching control circuit is electrically connected with an output end of the central processor. The output end of the power switching control circuit is respectively electrically connected with the input ends of a first power switching circuit and a second power switching circuit. The output ends of the first power switching circuit and the second power switching circuit are electrically connected with a power capacitor. A communication circuit is electrically connected with a communication signal end of the central processor. The anti-harmonic capacitor provided by the utility model has the advantages of simple structure, safe switching, small impact current to grid, long service life, low cost, overvoltage protection, over-current protection, over-temperature protection, harmonic wave resistance, simple and intuitive assembly, and stable and reliable application.
Description
Technical field
The utility model belongs to the power capacitor field for low pressure 0.4KV reactive power compensation, is specifically related to the box-like anti-harmonic capacitor of a kind of smart group.
Background technology
The electric energy that current electrical network uses mainly is for commercial power; account for about 70% greatly; and the commercial power overwhelming majority is for inductive load; and along with harmonic sources such as power electronic equipment increase; power utilization environment becomes increasingly complex; to this, usually can be on the line and connect the reactor that serial connection before the capacitor of capacitor suppresses harmonic wave, to suppress harmonic wave to the infringement of the capacitor reactive power loss of compensated line simultaneously.
Existing switchboard reactive power compensation mechanism comprises: the electric power knife switch, and fuse, the reactive power compensation checkout gear, the special-purpose switching relay of capacitor, power capacitors etc. reach as need and to suppress humorous wave energy, also need be connected in series the reactor that suppresses harmonic wave.There is following shortcoming in it: the switching electric current is big, can produce the surge impact electric current, and the special-purpose switching relay contact life-span of capacitor is short, and wiring is numerous and diverse, and it is big to take up room, the Maintenance and Repair inconvenience, and the cost height, mechanical connecting element is many, and equipment lost efficacy easily.
Summary of the invention
The purpose of this utility model provides a kind of switching safety, and is little to the electrical network impulse current, long service life, and low cost has overvoltage, overcurrent, overheat protector, and can suppress harmonic wave, the box-like anti-harmonic capacitor of smart group that fitting operation is easy.
The technical scheme that realizes the utility model purpose is the box-like anti-harmonic capacitor of a kind of smart group, comprise power capacitor, supply convertor, signal acquisition circuit, signal amplifies rectification circuit, central processing unit, the temperature sensing amplifier, power switching control circuit, the man-machine interaction device, communicating circuit, the first power switching circuit and the second power switching circuit, described signal acquisition circuit is electrically connected with the input that described signal amplifies rectification circuit, the output that described signal amplifies rectification circuit is electrically connected with the signal input part of described central processing unit, described temperature sensing amplifier is electrically connected with the temperature signal input of described central processing unit, the input of described power switching control circuit is electrically connected with the output of described central processing unit, the output of described power switching control circuit respectively with the described first power switching circuit, the input of the second power switching circuit is electrically connected, the described first power switching circuit, the output of the second power switching circuit is electrically connected with described power capacitor, described communicating circuit is electrically connected with the communication signal end of described central processing unit, and described supply convertor is described signal acquisition circuit, signal amplifies rectification circuit, central processing unit, the temperature sensing amplifier, power switching control circuit, the man-machine interaction device, communicating circuit, the first power switching circuit and the second power switching circuit provide power supply.
Described signal acquisition circuit comprises the current transformer that detects B phase line current and the voltage transformer that detects the AC phase voltage.
Described power capacitor comprises into first capacitor, second capacitor and the 3rd capacitor that " triangle " connects.
A is electrically connected in first output of the described first power switching circuit and the three-phase phase line, second output of the first power switching circuit is electrically connected with a drift angle of described " triangle " by first reactor, C is electrically connected in first output of the described second power switching circuit and the three-phase phase line, second output of the second power switching circuit is electrically connected with second drift angle of described " triangle " by second reactor, and the 3rd drift angle of described " triangle " is electrically connected by B in the 3rd reactor and the described three-phase phase line.
Described temperature sensing amplifier comprises thermistor and first resistance, is electrically connected with the temperature signal input of described central processing unit after described thermistor is connected with described first resistance.
Be equipped with the operating passing zero circuit in the described first power switching circuit and the second power switching circuit.
Described power switching control circuit comprises first triode, second triode and second resistance, described first triode, the base stage of second triode is electrically connected with the output of described central controller respectively, described first triode, the equal ground connection of the emitter of second triode, logical second resistance of the collector electrode of described first triode and the described first power switching circuit, the input of operating passing zero circuit is electrically connected in the second power switching circuit, the collector electrode of described second triode and the first power switching circuit, an end of magnetic latching relay is electrically connected in the described second power switching circuit.
Described communicating circuit is the RS485 communicating circuit.
The man-machine interaction device comprises housing and is arranged on the interior man-machine interaction circuit of housing, circuit is adjusted in overvoltage, under-voltage contrast, display circuit and adjusting input circuit, LED display, function show indicator light and regulate button on the described housing, described LED display is arranged on the top of housing, described function show indicator light be arranged on described LED display around, described adjusting button is arranged on described lower part of frame.
The utlity model has positive effect: of the present utility model simple in structure, switching safety is little to the electrical network impulse current; long service life, low cost has overvoltage, overcurrent, overheat protector; and can suppress harmonic wave, fitting operation is easy, directly perceived, and its use is reliable and stable.
Description of drawings
Content of the present utility model is easier clearly to be understood in order to make, according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail below, wherein:
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is the physical circuit schematic diagram that signal of the present utility model amplifies rectification circuit;
Fig. 3 is the physical circuit schematic diagram of temperature sensing amplifier of the present utility model;
Fig. 4 is the connecting circuit schematic diagram of power switching control circuit of the present utility model and the first power switching circuit, the second power switching circuit and power capacitor;
Fig. 5 is the external structure schematic diagram of man-machine interaction device of the present utility model.
Embodiment
(embodiment 1)
Fig. 1 to Fig. 5 has shown a kind of embodiment of the present utility model, and wherein Fig. 1 is schematic block circuit diagram of the present utility model; Fig. 2 is the physical circuit schematic diagram that signal of the present utility model amplifies rectification circuit; Fig. 3 is the physical circuit schematic diagram of temperature sensing amplifier of the present utility model; Fig. 4 is the connecting circuit schematic diagram of power switching control circuit of the present utility model and the first power switching circuit, the second power switching circuit and power capacitor; Fig. 5 is the external structure schematic diagram of man-machine interaction device of the present utility model.
See Fig. 1 to Fig. 5, the box-like anti-harmonic capacitor of a kind of smart group, comprise power capacitor 1, supply convertor 2, signal acquisition circuit 3, signal amplifies rectification circuit 4, central processing unit 5, temperature sensing amplifier 6, power switching control circuit 7, man-machine interaction device 8, communicating circuit 9, the first power switching circuit 10 and the second power switching circuit 11, described signal acquisition circuit 3 is electrically connected with the input that described signal amplifies rectification circuit 4, the output that described signal amplifies rectification circuit 4 is electrically connected with the signal input part of described central processing unit 5, described temperature sensing amplifier 6 is electrically connected with the temperature signal input of described central processing unit 5, the input of described power switching control circuit 7 is electrically connected with the output of described central processing unit 5, the output of described power switching control circuit 7 respectively with the described first power switching circuit 10, the input of the second power switching circuit 11 is electrically connected, the described first power switching circuit 10, the output of the second power switching circuit 11 is electrically connected with described power capacitor 1, described communicating circuit 9 is electrically connected with the communication signal end of described central processing unit 5, and described supply convertor 2 is described signal acquisition circuit 3, signal amplifies rectification circuit 4, central processing unit 5, temperature sensing amplifier 6, power switching control circuit 7, man-machine interaction device 8, communicating circuit 9, the first power switching circuit 10 and the second power switching circuit 11 provide power supply.
Described signal acquisition circuit 3 comprises the current transformer 31 that detects B phase line current and the voltage transformer 32 that detects the AC phase voltage.The model of current transformer is CT05-1, current transformer changes into the accessible small-signal of central processing unit with 0～5A current signal of primary current instrument transformer output, be input to corresponding (the 9th) pin of operational amplifier IC3, rectification amplifying circuit by being constituted by diode D3, D4 and operational amplifier IC4 again, be input to central processing unit, after central processing unit internal simulation/digital conversion, measure the power network current signal;
The model of voltage transformer is PT01-4, voltage transformer induces and the proportional voltage signal of supply voltage, be input to corresponding (second) pin of operational amplifier IC1, by by diode D2, the rectification amplifying circuit that D1 and operational amplifier IC2 constitute, be input to central processing unit, after central processing unit internal simulation/digital conversion, compare with the man-machine interaction unit set point, detect whether overvoltage, under-voltage, when overvoltage, cut off power capacitor, when under-voltage, forbid dropping into power capacitor, but allow the excision power capacitor, thereby guarantee that the power capacitor reliability service can not damage; The model of described operational amplifier IC1～IC4 is LM224, all is parallel with a resistance R 2 and a capacitor C 2 between the output of operational amplifier IC2, IC4 and reverse input end;
Simultaneously, compare with current signal, according to the gap at phase angle, calculate the reactive power size, when this reactive power surpasses the man-machine interaction unit set point, drop into power capacitor, carry out reactive power compensation, promote the power circuit power supplying efficiency.
Described power capacitor 1 comprises into the first capacitor CAP1, the second capacitor CAP2 and the 3rd capacitor CAP3 that " triangle " connects.
A is electrically connected in first output of the described first power switching circuit 10 and the three-phase phase line, second output of the first power switching circuit 10 is electrically connected with a drift angle of described " triangle " by the first reactor L1, C is electrically connected in first output of the described second power switching circuit 11 and the three-phase phase line, second output of the second power switching circuit 11 is electrically connected with second drift angle of described " triangle " by the second reactor L2, and the 3rd drift angle of described " triangle " is electrically connected by B in the 3rd reactor L3 and the described three-phase phase line.
Described temperature sensing amplifier 6 comprises thermistor RT and first resistance R 1, is electrically connected with the temperature signal input of described central processing unit 5 after described thermistor RT connects with described first resistance R 1.
Be equipped with operating passing zero circuit 12 in the described first power switching circuit 10 and the second power switching circuit 11.The model of operating passing zero circuit master chip is MOC3083.Adopt the operating passing zero circuit can improve dependability.
Described power switching control circuit 7 comprises the first triode Q1, the second triode Q2 and second resistance R 2, the described first triode Q1, the base stage of the second triode Q2 is electrically connected with the output of described central controller 5 respectively, the described first triode Q1, the equal ground connection of the emitter of the second triode Q2, logical second resistance R 2 and the described first power switching circuit 10 of the collector electrode of the described first triode Q1, the input of operating passing zero circuit 12 is electrically connected in the second power switching circuit 11, the collector electrode of the described second triode Q2 and the first power switching circuit 10, an end end of magnetic latching relay is electrically connected in the described second power switching circuit 11.Formed by magnetic latching relay J1, thyristor SCR1 and thyristor SCR2 and operating passing zero circuit in the power switching electricity, wherein SCR11 and SCR2 reverse parallel connection, a contact in a pair of normally opened contact of magnetic latching relay J1 connects the anode of thyristor SCR1, the negative electrode of SCR2, another contact connects the negative electrode of thyristor SCR1, the anode of SCR2
The anode of thyristor SCR1, the negative electrode of SCR2 are first output,
The negative electrode of thyristor SCR1, the anode of SCR2 are second output,
The output control terminal of operating passing zero IC is connected the gate pole of thyristor SCR1, and another output control terminal of operating passing zero IC is connected to the gate pole of thyristor SCR2.
Described communicating circuit 9 is the RS485 communicating circuit.
Man-machine interaction device 8 comprises housing 81 and the man-machine interaction circuit that is arranged in the housing 81, circuit is adjusted in overvoltage, under-voltage contrast, display circuit and adjusting input circuit, LED display 811, function show indicator light 812 and regulate button 813 on the described housing, described LED display 811 is arranged on the top of housing 81, described function show indicator light 812 be arranged on described LED display 811 around, described adjusting button 813 is arranged on the bottom of described housing 81.Regulate button 813 and comprise setting key 8131, upwarding key 8132, down Arrow 8133.
The course of work of power switching control circuit and power switching circuit is summarized as follows:
Central processing unit, drops at needs under the situation of power capacitor by the contrast of man-machine interaction device set point through handling:
The base stage of output high level control triode Q1 makes triode Q1 conducting earlier, and the collector electrode of triode Q1 connects the end of current-limiting resistance R2 always, and the other end of resistance R 2 is connected with the S4 pin of power switching module;
The S3 pin of power switching module is connected with power vd D2+12V, and the S3 of power switching module, S4 pin are connected to operating passing zero circuit master chip, when alternating voltage zero-crossing, and this operating passing zero circuit master chip conducting,
After the triode Q1 conducting 20mS, the base stage of central processing unit output high level control triode Q2, the collector electrode utmost point of triode Q2 is connected with the S2 pin of power switching module;
The S1 pin of power switching module is connected to VDD2+12V, and the S1 of power switching module, S2 pin are connected to magnetic latching relay coil two ends, when obtaining forward voltage, and the magnetic latching relay adhesive.When realize dropping into power capacitor like this, reduce or prevent impulse current to electrical network.
The process of cutting off is opposite with above-mentioned input process, when central processing unit needs rupturing duty switching module, cut off the high level of triode Q2 base stage earlier, making magnetic latching relay obtain reverse voltage cuts off, through after the 20mS, disconnect the high level of triode Q1 base stage, cut off operating passing zero IC, power switching module is thoroughly cut off.Master chip IC model can be MOC3083 in the operating passing zero circuit, considers reliability, can adopt the mode of two MOC3083 series connection shown in the figure to use.Magnetic latching relay J1 can adopt existing techniques in realizing.
Thyristor SCR1; the SCR2 reverse parallel connection; and then and relay J 1 normally opened contact parallel connection; thyristor SCR1; SCR2 is controlled by operating passing zero IC; when CPU element drives operating passing zero IC by S3 terminal and S4 terminal; thyristor conducting when the supply voltage zero passage; alleviate the surge impact electric current to electrical network to greatest extent; magnetic latching relay J1 is later than operating passing zero IC certain hour and connects; as 20mS, but the protection relay contact is not subjected to heavy current impact, prolongs relay useful life; after magnetic latching relay J1 connects; make thyristor SCR1; SCR2 anode and cathode voltage are zero, and by the thyristor operation principle as can be known: when thyristor anode and cathode voltage were not enough to keep conducting, thyristor ended; deactivate; this moment, no matter thyristor all ended, and thyristor can not generated heat burn out whether conducting of operating passing zero IC.
Its operation principle is summarized as follows: by current transformer, heavy current is changed into and the proportional light current pressure of electric current signal, by voltage transformer, high voltage is changed into light current press signal; Current signal after the conversion, voltage signal are sent into signal and are amplified rectification circuit, the digital quantity signal that the ADC function of analog signal by central processing unit changed into, central processing unit calculates the phase difference of two signals, then calculate power factor and reactive power, to judge whether input compensation electric capacity, or cut-out power capacitor, pass through drive circuit, thyristor on the driving power module and magnetic latching relay composite switch circuit, realize operating passing zero, avoid the heavy current impact to electrical network, prolong the contact endurance of magnetic latching relay.
Obviously, above-described embodiment of the present utility model only is for the utility model example clearly is described, and is not to be restriction to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And these belong to apparent variation or the change that connotation of the present utility model extends out and still belong to protection range of the present utility model.
Claims (9)
1. box-like anti-harmonic capacitor of smart group, comprise power capacitor, supply convertor, signal acquisition circuit, signal amplifies rectification circuit, central processing unit, the temperature sensing amplifier, power switching control circuit, the man-machine interaction device, communicating circuit, the first power switching circuit and the second power switching circuit, it is characterized in that: described signal acquisition circuit is electrically connected with the input that described signal amplifies rectification circuit, the output that described signal amplifies rectification circuit is electrically connected with the signal input part of described central processing unit, described temperature sensing amplifier is electrically connected with the temperature signal input of described central processing unit, the input of described power switching control circuit is electrically connected with the output of described central processing unit, the output of described power switching control circuit respectively with the described first power switching circuit, the input of the second power switching circuit is electrically connected, the described first power switching circuit, the output of the second power switching circuit is electrically connected with described power capacitor, described communicating circuit is electrically connected with the communication signal end of described central processing unit, and described supply convertor is described signal acquisition circuit, signal amplifies rectification circuit, central processing unit, the temperature sensing amplifier, power switching control circuit, the man-machine interaction device, communicating circuit, the first power switching circuit and the second power switching circuit provide power supply.
2. the box-like anti-harmonic capacitor of smart group according to claim 1 is characterized in that: described signal acquisition circuit comprises the current transformer that detects B phase line current and the voltage transformer that detects the AC phase voltage.
3. the box-like anti-harmonic capacitor of smart group according to claim 2 is characterized in that: described power capacitor comprises into first capacitor, second capacitor and the 3rd capacitor that " triangle " connects.
4. the box-like anti-harmonic capacitor of smart group according to claim 3, it is characterized in that: A is electrically connected in first output of the described first power switching circuit and the three-phase phase line, second output of the first power switching circuit is electrically connected with a drift angle of described " triangle " by first reactor, C is electrically connected in first output of the described second power switching circuit and the three-phase phase line, second output of the second power switching circuit is electrically connected with second drift angle of described " triangle " by second reactor, and the 3rd drift angle of described " triangle " is electrically connected by B in the 3rd reactor and the described three-phase phase line.
5. the box-like anti-harmonic capacitor of smart group according to claim 4, it is characterized in that: described temperature sensing amplifier comprises thermistor and first resistance, is electrically connected with the temperature signal input of described central processing unit after described thermistor is connected with described first resistance.
6. the box-like anti-harmonic capacitor of smart group according to claim 5 is characterized in that: be equipped with the operating passing zero circuit in the described first power switching circuit and the second power switching circuit.
7. the box-like anti-harmonic capacitor of smart group according to claim 6, it is characterized in that: described power switching control circuit comprises first triode, second triode and second resistance, described first triode, the base stage of second triode is electrically connected with the output of described central controller respectively, described first triode, the equal ground connection of the emitter of second triode, logical second resistance of the collector electrode of described first triode and the described first power switching circuit, the input of operating passing zero circuit is electrically connected in the second power switching circuit, the collector electrode of described second triode and the first power switching circuit, an end of magnetic latching relay is electrically connected in the described second power switching circuit.
8. the box-like anti-harmonic capacitor of smart group according to claim 7, it is characterized in that: described communicating circuit is the RS485 communicating circuit.
9. the box-like anti-harmonic capacitor of smart group according to claim 8, it is characterized in that: the man-machine interaction device comprises housing and is arranged on the interior man-machine interaction circuit of housing, circuit is adjusted in overvoltage, under-voltage contrast, display circuit and adjusting input circuit, LED display, function show indicator light and regulate button on the described housing, described LED display is arranged on the top of housing, described function show indicator light be arranged on described LED display around, described adjusting button is arranged on described lower part of frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202161526U CN203193282U (en) | 2013-04-11 | 2013-04-11 | Intelligent combined-type anti-harmonic capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202161526U CN203193282U (en) | 2013-04-11 | 2013-04-11 | Intelligent combined-type anti-harmonic capacitor |
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| Publication Number | Publication Date |
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| CN203193282U true CN203193282U (en) | 2013-09-11 |
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| CN2013202161526U Expired - Fee Related CN203193282U (en) | 2013-04-11 | 2013-04-11 | Intelligent combined-type anti-harmonic capacitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580037A (en) * | 2013-10-25 | 2014-02-12 | 恒一电气有限公司 | Double-switch capacitance compensation device |
-
2013
- 2013-04-11 CN CN2013202161526U patent/CN203193282U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580037A (en) * | 2013-10-25 | 2014-02-12 | 恒一电气有限公司 | Double-switch capacitance compensation device |
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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 |
Granted publication date: 20130911 Termination date: 20150411 |
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| EXPY | Termination of patent right or utility model |