CN201408997Y - Low-voltage intelligent power capacitor - Google Patents
Low-voltage intelligent power capacitor Download PDFInfo
- Publication number
- CN201408997Y CN201408997Y CN2009200137649U CN200920013764U CN201408997Y CN 201408997 Y CN201408997 Y CN 201408997Y CN 2009200137649 U CN2009200137649 U CN 2009200137649U CN 200920013764 U CN200920013764 U CN 200920013764U CN 201408997 Y CN201408997 Y CN 201408997Y
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- Prior art keywords
- capacitor
- low
- electronic switch
- intelligent power
- voltage
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- Expired - Fee Related
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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
The utility model relates to an electrical product, namely a low-voltage intelligent power capacitor, the main body of which comprises an electronic switch, a single-chip microcomputer, a protection circuit and a capacitor. The utility model is characterized in that the capacitor C is connected with the electronic switch K in series, the electronic switch K is connected with a holding relay J in parallel, and the single-chip microcomputer D is provided with a voltage, current and temperature information processing unit and an instruction output unit. The product manufactured in the technical scheme can determine capacitor switching according to the sampling parameters of the circuit, the current impact is small during switching, the device is not easy to damage, the failure rate of compensation equipment is significantly reduced, the service life of the product is prolonged, and the maintenance cost is reduced. The low-voltage intelligent power capacitor has the advantages of simple structure, small occupation area, convenient on-site maintenance and the like, and is a substitute product of the existing similar device.
Description
Affiliated technical field
The utility model relates to a kind of electric equipment products, promptly a kind of low-voltage intelligent power capacitor.
Background technology
For needing power supply that the inductive load such as transformer, asynchronous motor, electric induction furnace, A.C. welder of reactive power is provided, often need to adopt capacitor to carry out reactive power compensation and improve power factor, to reduce power consumption and line loss because of carrying reactive power to produce.Reactive power compensation mode at present commonly used has that low pressure compensates individually, low pressure centralized compensation and high pressure centralized compensation.Indivedual compensation be exactly according to indivedual power consumption equipments to idle needs with separate unit or many secondary capacitor groups dispersedly with power consumption equipment mutually and connect, by control and protective device and motor while switching.The low pressure centralized compensation is that secondary capacitor is connected on the transformer low voltage bus bar side by low tension switch, with reactive power compensation switching device as the control protective device, according to the load or burden without work on the low-voltage bus bar and the direct switching of control capacitor.The high pressure centralized compensation is that Shunt Capacitor Unit directly is contained in compensation way on electric substation's high voltage bus.Wherein, the low pressure centralized compensation is more commonly used, and particularly user's distribution board is installed parallel capacitor more.This type of compensator constitutes final controlling element by idle compensating control, switch, compensation arrangement, controls the switching of power capacitor by reactive power controller, has higher economical efficiency and practicality., existing reactive power compensator exists also that intelligent degree is low, and rush of current is bigger during switching, and device is fragile, and useful life is short, cost height, not shortcoming such as easy care.
Summary of the invention
Little, the non-damageable low-voltage intelligent power capacitor of device of electric current when the purpose of this utility model provides a kind of intelligent degree height, switched capacitor.
Adopted following technical scheme in order to finish above-mentioned purpose: develop a kind of low-voltage intelligent power capacitor, its main body comprises electronic switch, single chip microcomputer, protective circuit and capacitor.Be characterized in: said capacitor and electronic switch are in series, and said electronic switch is in parallel with latching relay, and said single chip microcomputer has electric current and voltage temperature information processing unit and output order unit.During work, single chip microcomputer sends instruction to electronic switch after analyzing relatively to the signal of sampling testing circuit and protective circuit, when voltage zero-cross, building-out capacitor is implemented automatic switching.
Said electronic switch is made of silicon-controlled device.
Said electronic switch is made of the IGBT device.
Said reactive-load compensator capacitor has three, adopts star connection to insert three-phase power line.
Said reactive-load compensator capacitor has three, adopts delta connection to insert three-phase power line.
Said protective circuit is current sampling circuit, voltage sample circuit and line temperature sensor.
The low-voltage intelligent power capacitor that adopts technique scheme to make, can determine the switching of electric capacity according to the sampling parameters of circuit, realize intelligent, sequencing control, rush of current is little during switching, device is not fragile, reduce the failure rate of compensation equipment significantly, prolonged useful life, reduced maintenance cost, and have simple in structure, advantages such as it is little to take up room, and site examining and repairing is convenient are the substitute products of existing same device.
Description of drawings
Fig. 1 is the structure chart of a kind of embodiment;
Fig. 2 is the structure chart of a kind of embodiment;
Fig. 3 is the structure chart of a kind of embodiment;
Fig. 4 is a kind of working state figure of this embodiment;
Fig. 5 is the another kind of working state figure of this embodiment.
Embodiment
Introduce a kind of embodiment in conjunction with the accompanying drawings: as shown in Figure 1, this device is to be connected in series electronic switch K in the loop of compensation condenser C, and electronic switch K is in parallel with latching relay J.Drive coil two ends S3, the S4 of the trigger end S1 of electronic switch and S2 and latching relay J all are connected to single chip microcomputer D.The sampled signal of voltage detecting circuit V, current detection circuit I, temperature sensor F is added on the S5-S7 of single chip microcomputer D.Said apparatus is connected to three-phase circuit, and single chip microcomputer calculates by analysis to the power factor on the circuit, by the automatic switching of zero-cross triggering circuit control electronic switch realization to capacitor C.
Fig. 2 has introduced a kind of controllable silicon electronic switch, is made of the thyristor D1 and the D2 of two reverse parallel connections.Its trigger end S1 and S2 order sheet microcomputer D.
Fig. 3 has introduced a kind of IGBT electronic switch, is made of the IGBT device.Its trigger end S1 and S2 order sheet microcomputer D.
Fig. 4 has introduced a kind of operating state, and three capacitors are that triangle connects, and wherein two capacitors are the electronic switches that are connected with controlled by single chip microprocessor, have constituted reactive power compensation circuit.
Fig. 5 has introduced another kind of operating state, and three capacitors are star connection, and each capacitor all is connected with the electronic switch of controlled by single chip microprocessor, has constituted reactive power compensation circuit.
Its operation principle is: said apparatus is connected to three-phase circuit, voltage by Acquisition Circuit calculates realtime power factor, submits the point of zero voltage trigger in the single chip microcomputer to, trigger the conducting and the closing motion of thyristor or IGBT device, realize the input or the excision of capacitor C.
Claims (6)
1. low-voltage intelligent power capacitor; its main body comprises electronic switch, single chip microcomputer, protective circuit and capacitor; it is characterized in that: said capacitor C and electronic switch K are in series; said electronic switch K is in parallel with latching relay J, and said single chip microcomputer D has electric current and voltage temperature information processing unit and output order unit.
2. low-voltage intelligent power capacitor according to claim 1 is characterized in that: said electronic switch K is made of silicon-controlled device.
3. low-voltage intelligent power capacitor according to claim 1 is characterized in that: said electronic switch K is made of the IGBT device.
4. low-voltage intelligent power capacitor according to claim 1 is characterized in that: said capacitor C has three, adopts star connection to insert three-phase power line.
5. low-voltage intelligent power capacitor according to claim 1 is characterized in that: said capacitor C has three, adopts delta connection to insert three-phase power line.
6. low-voltage intelligent power capacitor according to claim 1 is characterized in that: said protective circuit is current sampling circuit i, voltage sample circuit v and line temperature sensor f.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200137649U CN201408997Y (en) | 2009-05-13 | 2009-05-13 | Low-voltage intelligent power capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200137649U CN201408997Y (en) | 2009-05-13 | 2009-05-13 | Low-voltage intelligent power capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201408997Y true CN201408997Y (en) | 2010-02-17 |
Family
ID=41679944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200137649U Expired - Fee Related CN201408997Y (en) | 2009-05-13 | 2009-05-13 | Low-voltage intelligent power capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201408997Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969230A (en) * | 2010-10-18 | 2011-02-09 | 吕纪文 | Power supply loop monitoring device and system |
| CN105632757A (en) * | 2014-11-06 | 2016-06-01 | 佛山市南海区欣源电子有限公司 | Intelligent low-voltage power capacitor |
| CN109586316A (en) * | 2018-12-04 | 2019-04-05 | 广州番禺职业技术学院 | A kind of factory's Practical power factor compensation method |
-
2009
- 2009-05-13 CN CN2009200137649U patent/CN201408997Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101969230A (en) * | 2010-10-18 | 2011-02-09 | 吕纪文 | Power supply loop monitoring device and system |
| CN101969230B (en) * | 2010-10-18 | 2014-09-10 | 吕纪文 | Power supply loop monitoring device and system |
| CN105632757A (en) * | 2014-11-06 | 2016-06-01 | 佛山市南海区欣源电子有限公司 | Intelligent low-voltage power capacitor |
| CN109586316A (en) * | 2018-12-04 | 2019-04-05 | 广州番禺职业技术学院 | A kind of factory's Practical power factor compensation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20100513 |