CN102118906A - DC supply mode of LED street lamp - Google Patents
DC supply mode of LED street lamp Download PDFInfo
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- CN102118906A CN102118906A CN2010100172014A CN201010017201A CN102118906A CN 102118906 A CN102118906 A CN 102118906A CN 2010100172014 A CN2010100172014 A CN 2010100172014A CN 201010017201 A CN201010017201 A CN 201010017201A CN 102118906 A CN102118906 A CN 102118906A
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- street lamp
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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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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- 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
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention relates to a DC supply mode of an LED street lamp and belongs to the field of low-voltage power supply and distribution. A DC power supply system comprises a DC power station composed of a street lamp transformer (1), a rectifier filter (2) and a reactive power compensator (3), a DC transmission line, an LED street lamp driving power supply (4) and the like. With the advancement of the LED light source technology, the service life of the light source exceeds 50, 000 hours, the consumption of electric energy is lower than one half of that of a conventional light source, the LED street lamp technology gradually comes into practice, and the LED light source is more and more widely used; the working mode of the conventional LED street lamp is as follows: each lamp is provided with a driving power supply for converting alternating current into direct current, so that the LED light source emits light; the single-phase rectifier, the filter capacitor and the PFC (power factor correction) circuit in the power supply are the bottleneck of popularization and application of the LED street lamp due to shorter service life besides harmonic pollution; and to fully exert the advantages of the LED light source with energy conservation and long service life, the invention provides a solution for DC supply mode of the LED street lamp, electric energy is provided for the LED street lamp by the DC supply mode, and the rectifier bridge, the filter capacitor and the PFC circuit in the conventional power supply are saved, so that the purpose of long-term secure and reliable operation of the LED street lamp is achieved.
Description
Affiliated technical field:
The invention belongs to low pressure confession, distribution field, a kind of LED street lamp DC power-supply system solution is provided.
Background technology:
The electric light source commonly used of city street lamp mainly is high-pressure sodium lamp, Metal halogen lamp, high-pressure mercury lamp and incandescent lamp at present, and their working power all adopts alternating current 220V.Fig. 1 is present street lamp dedicated transformer power supply schematic diagram, wherein supplies a dypass lamp for both sides street lamp, B mutually respectively with C mutually by A, and the transformer three phase supply is extremely uneven, transformer capacity is bigger than normal, loss increases.
Along with the technological progress of large-power light-emitting diodes led light source, the LED street lamp progressively enters the practical stage.Surpass 50000 hours the useful life of led light source, be at least 10 times of other conventional light source, the consumption that led light source substitutes electric energy behind the common road-light light-source less than conventional light source 1/2, can reduce the cross-section of cable, reduce power supply dedicated transformer capacity, its illumination is regulated convenience and is fit to the requirement of street lamp change power energy-saving, and their use will be more and more widely.
The characteristics of led light source are to adopt dc constant flowing power to drive, because single led light source works voltage is lower, adopt a plurality of led light source tandem workings in actual use, but total operating voltage can not surpass 40V.So the mode of operation of existing LED street lamp is each lamp joins one alternating current 220V is converted to the direct current constant-current driving power supply that is fit to led light source, comprises in the power supply: single-phase rectifier, filter capacitor, PFC, inversion circuit etc.
Fig. 2 is existing LED streetlamp driving power supply principle reduced graph, C is a rectification energy storage filter capacitor, and L seals in the power transformer inductance, as the charging interval of PFC loop energy-storage travelling wave tube expansion rectification storage capacitor C, with the bring to power factor, reduce the Harmonics of Input component.
Input current each harmonic effective value:
(n＝1，3，5，7---------)
Measured result shows that power factor PF can reach 0.85, and triple harmonic current accounts for 59% of fundametal compoment, and total current harmonic distortion THD is 64%.
The energy storage high-pressure electrolysis capacitor C life-span that rectifying and wave-filtering and PFC loop must dispose is shorter, generally is no more than 5000 hours, causes LED road lamp power supply its life-span except that producing a large amount of harmonic waves shorter, has limited the bulk life time of LED street lamp.
In order to give full play to energy-conservation, the long-life advantage of led light source, must scientifically solve LED road lamp power supply life-span and harmonic problem, under the prerequisite that guarantees mains supply safety, make the life-span of LED street lamp reach quite level of led light source.
Existing big-power rectification power supply technology has successfully solved problems such as harmonic wave, power factor (PF), reliability.If street-lighting transformer is designed to the direct current supply station, by DC power-supply system DC power supply is transported to the LED street lamp, then can cancel the commutating circuit, filter capacitor, the PFC loop that influence the life-span in the existing LED streetlamp driving power supply, solve the different problems of life-span of LED street lamp, improve the influence of harmonic wave and power factor simultaneously electrical network with led light source.
Adopt DC power-supply system can solve the uneven output of street-lighting transformer simultaneously, reduce transformer capacity, reduce the service cable sectional area, fail safe, reliability, maintainability and the life-span of improving whole road lamp system.
Summary of the invention:
LED street lamp direct current supply pattern provided by the invention, it is street lamp direct current transmission and distribution system at the design of led light source direct current electricity consumption characteristics, basic design philosophy is to become present ac transmission to be direct current transportation, street-lighting transformer is designed to comprise: the direct current supply station of transformer, rectifier filter, reactive power compensation, by DC power transmission line power delivery is arrived each LED streetlamp driving power supply.
Fig. 3 is street lamp direct current supply modular system figure, comprising: street-lighting transformer 1, rectifier filter 2, reactive power compensation 3, DC distribution circuit, LED streetlamp driving power supply 4, led light source 5, GPF (General Protection False control does not indicate with switch, fuse, lightning protection etc.
The DC power-supply system workflow is to send rectifier to be converted to direct current after by street-lighting transformer the 10KV High Level AC Voltage being become low-voltage AC, reactive power compensation and filter compensate to satisfy the electrical network standard-required the humorous reactive power that involves that produces in the switching process, the direct current transmission and distribution circuit is transported to the LED street lamp of dispersion, LED streetlamp driving power supply driving LED light source luminescent with direct current power.
The direct current supply station owner will comprise that street-lighting transformer, rectifier filter, reactive power compensation, prior art have multiple Scheme Choice:
1. common street-lighting transformer, three-phase six arteries and veins rectifiers compensate in conjunction with 5 subharmonic, and are simple in structure, rectifier cell is few, reliability is high, and three-phase six arteries and veins rectified power factors can reach 0.8, the total current harmonic distortion is less than 60%.
2. unit three winding rectifier transformers are in conjunction with three-phase 12 arteries and veins commutation techniques, and harmonic wave is little than first kind of scheme, satisfies the electric power system requirement substantially, and three-phase 12 arteries and veins rectified power factors can reach 0.9, the total current harmonic distortion is less than 13%.
3. two two winding transformer paired runnings are in conjunction with three-phase 12 arteries and veins rectification schemes, owing to adopt two platform independent transformers, the easy matching Design of its output impedance is stopped 5 subharmonic, and effect is slightly better than scheme 2.
4. unit four winding rectifier transformers are in conjunction with three-phase 18 arteries and veins rectifications, and harmonic wave is littler than second kind of scheme, and power factor can reach 0.9, the total current harmonic distortion is less than 5.6%, and total harmonic voltage distortion meets the IEEE519-1992 standard-required less than 2%.
5. common street-lighting transformer is in conjunction with pulse-width modulation (PWM) rectification, adopt full-controlled switch pipe IGBT to replace traditional half control type switching tube or diode, cut the control rectification with PWM and replace phase control rectifier or do not control rectification, the system dynamics response is fast, power factor can reach 0.99, and harmonic current distorts less than 3%.
Reactive power compensation and filter adopt prior art, and two kinds of Scheme Choice are arranged:
1. active filter, rapid dynamic response speed.
2. passive filter is simple, safe and reliable.
A is that the common street-lighting transformer of employing is that the unit three-winding transformer is that the two-shipper two winding transformer is in conjunction with the electric principle schematic of three-phase 12 arteries and veins rectifications in conjunction with three-phase 12 arteries and veins rectifications, c in conjunction with three-phase six arteries and veins rectifications, b among Fig. 4.
A is that single-phase rectifier, b are that three-phase six arteries and veins rectifications, c are three-phase 12 arteries and veins rectified output voltage waveform schematic diagrames among Fig. 5.The multiple output DC fluctuation is more little more, power factor (PF) is big more, harmonic content is more little for the arteries and veins number of rectification in a word, and the reactive power compensation and the harmonic compensation capacity that need are less.
Fig. 6 is the triphase single-switch pulse-width modulation rectification principle sketch that adopts IGBT, realizes the transfer of inductance energy by the speed-sensitive switch of control S, and the input ac voltage harmonic wave is less than 3%, and PF reaches 1.
Fig. 7 realizes the non-isolation constant-current type of PWM high frequency DC power supply example schematic diagram, cancelled loops such as commutating circuit, filter capacitor, PFC in the LED streetlamp driving power supply after the employing direct current supply, the design of power supply more flexibly, main circuit structure is simple, reliability is high.
No matter adopt which kind of technical scheme to realize concentrating direct current supply to compare in a word with the single-phase rectifier LED road lamp power supply that disperses to install, its power factor, total voltage harmonic distortion THDv etc. will satisfy the electric power netting safe running requirement, can solve the harmonic wave and the life problems of original LED road lamp power supply completely, realize the non-maintaining all the year round safe operation of street lamp.
Can solve the uneven output of original street-lighting transformer, reduction transformer capacity, minimizing service cable sectional area after adopting DC power-supply system, energy-saving and cost-reducing.
The present invention is to provide a kind of LED street lamp direct current supply pattern; any LED street lamp direct current supply scheme that alternating current is converted to galvanic technical scheme and supporting electrical power trans mission/distribution system formation of concentrating belongs to protection category of the present invention all without prejudice to basic thought of the present invention.
Description of drawings:
Fig. 1 is existing street lamp dedicated transformer power supply schematic diagram, the street lamp dedicated transformer becomes 220V with 10KV and supplies with both sides, road street lamp respectively, wherein B, C supply the both sides street lamp for a dypass lamp, A respectively mutually mutually, and its transformer-supplied three-phase is extremely uneven, transformer capacity waste 1/3.
Fig. 2 is present LED streetlamp driving power supply schematic diagram, and C is a rectification energy storage filter capacitor, and L seals in transformer inductance, increases the charging interval of C as PFC loop energy-storage travelling wave tube.
Fig. 3 is street lamp direct current supply modular system figure, among the figure: the 1st, street-lighting transformer, the 2nd, rectifier filter, the 3rd, reactive power compensation, the 4th, LED streetlamp driving power supply, the 5th, LED road-light light-source.
Among Fig. 5: a is that single-phase rectifier, b are that three-phase six arteries and veins rectifications, c are three-phase 12 arteries and veins rectified output voltage waveform schematic diagrames.
Fig. 6 is the triphase single-switch pulse-width modulation rectification principle sketch that adopts IGBT, realizes the transfer of inductance energy guaranteeing that input ac voltage does not have harmonic wave by the speed-sensitive switch of control S.
Fig. 7 is the non-isolation constant-current type of a PWM high frequency DC power supply example schematic diagram, U is that pulse-width modulation PWM chip, Q1 are that MOS transistor, R3 are continuous current detection feedback resistance, and constant-current source adopts the DC decompression type, and efficient can reach more than 97%, shared circuit space is less, the reliability height.
Execution mode:
Fig. 3 is street lamp direct current supply pattern implementation system figure, comprising: street-lighting transformer 1, rectifier 2, reactive power compensation and filter 3, LED streetlamp driving power supply 4, LED road-light light-source 5.They and other conventional controls constitute complete DC power-supply system with switch, DC distribution circuit, fuse, lightning protection device etc.
Is example with street-lighting transformer in conjunction with the six arteries and veins rectifications of 3 phases, the 10KV high pressure becomes low-voltage AC by street-lighting transformer 1, by three-phase six arteries and veins rectifiers 2 low-voltage AC is become direct current, the quintuple harmonics and idle the compensating that produce in 3 pairs of switching processes of reactive power compensation and filter, the ceiling voltage that DC power transmission line produces the direct current supply station is transported to the LED streetlamp driving power supply 4 of dispersion for the 400*1.414V direct current power, by LED road lamp power supply driving LED light source luminescent.
The DC power-supply system operating voltage of this example is 530V, and the ratio of comparing with original Alternating Current Power Supply with the power supply current is 0.35, and the service cable sectional area that needs is littler, and cable selects for use former ac voltage withstanding 0.6/1KV service cable can satisfy safe requirement of withstand voltage.
What the LED streetlamp driving power supply after the employing DC transmission system was imported is DC power supply, no longer need loops such as commutating circuit, filter capacitor, PFC, can adopt the non-insulating power supply of pulse-width modulation high frequency, more than the efficient height to 97%, shared circuit space is less, reliability is high.
Fig. 7 is the non-isolation constant-current type of a pulse-width modulation PWM DC power supply schematic diagram, and U is that pulse width modulation controlled chip, Q1 are that MOS transistor, R3 are that current feedback detects resistance, and constant-current source adopts the DC decompression type, and shared circuit space is less.
Adopt its power factor, total voltage harmonic distortion THDv after the concentrated rectification direct current supply scheme of three-phase six arteries and veins rectifications and quintuple harmonics compensation all to be better than disperseing the single-phase rectifier power supply of installing greatly in a word, thoroughly solve the fatal problem of original LED road lamp power supply simultaneously, realize the non-maintaining operation of street lamp, promote the application of LED street lamp in the city street lamp illumination.
Claims (7)
1. the present invention is a kind of LED street lamp direct current supply pattern, it is characterized in that adopting direct current form transmission of electric energy, and the DC power-supply system of implementing this pattern comprises: direct current supply station, supply line, LED streetlamp driving power supply.
2. the direct current supply station in the claim 1 of the present invention is characterized in that comprising at least transformer, rectifier filter and reactive power compensation.
3. the transformer in the claim 2 of the present invention is finished High Level AC Voltage to the low-voltage AC translation function, can select forms such as common street-lighting transformer, three winding rectifier transformers, two parallel operation of transformers, four winding rectifier transformers for use, the output low-voltage alternating current power supply is imported power supply as multi-pulse rectification.
4. the rectifier filter in the claim 2 of the present invention is to adopt the multi-pulse rectification loop that matches with claim 3 transformer of the present invention, converts alternating current input power supplying to DC power supply; Adopt active power filtering or passive filtering mode harmonic carcellation, compensating reactive power.
5. the common street-lighting transformer of the transformer adopting in the claim 2 of the present invention, pulse-width modulation (PWM) commutation technique is adopted in rectifier filter and reactive power compensation.
6. the DC power-supply system operating voltage is lower than 800V in the claim 1 of the present invention, and supply line's DC break down voltage is greater than more than the direct-current working volts 200V.
7. the LED streetlamp driving power supply in the claim 1 of the present invention is characterized in that: input and output all are DC power supply, inner no input AC rectification, filtering, PFC loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100172014A CN102118906A (en) | 2010-01-04 | 2010-01-04 | DC supply mode of LED street lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100172014A CN102118906A (en) | 2010-01-04 | 2010-01-04 | DC supply mode of LED street lamp |
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| CN102118906A true CN102118906A (en) | 2011-07-06 |
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| CN2010100172014A Pending CN102118906A (en) | 2010-01-04 | 2010-01-04 | DC supply mode of LED street lamp |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2503316A (en) * | 2012-06-22 | 2013-12-25 | O2Micro Inc | Circuits and methods for driving light sources |
| US8698419B2 (en) | 2010-03-04 | 2014-04-15 | O2Micro, Inc. | Circuits and methods for driving light sources |
| US8866398B2 (en) | 2012-05-11 | 2014-10-21 | O2Micro, Inc. | Circuits and methods for driving light sources |
| US9030122B2 (en) | 2008-12-12 | 2015-05-12 | O2Micro, Inc. | Circuits and methods for driving LED light sources |
| CN104753070A (en) * | 2013-12-31 | 2015-07-01 | 深圳市思铭实业有限公司 | High-speed highway LED street lamp or highway LED street lamp line reactive power compensation method |
| CN104812120A (en) * | 2014-01-24 | 2015-07-29 | 潘佩昌 | Road LED illumination DC power supply method |
| US9232591B2 (en) | 2008-12-12 | 2016-01-05 | O2Micro Inc. | Circuits and methods for driving light sources |
| US9253843B2 (en) | 2008-12-12 | 2016-02-02 | 02Micro Inc | Driving circuit with dimming controller for driving light sources |
| US9386653B2 (en) | 2008-12-12 | 2016-07-05 | O2Micro Inc | Circuits and methods for driving light sources |
| CN106058895A (en) * | 2016-08-04 | 2016-10-26 | 三河市汇莹电气设备制造有限公司 | Reactive power compensator |
| WO2018227328A1 (en) * | 2017-06-12 | 2018-12-20 | The University Of Hong Kong | Passive three-phase light-emitting diode drivers |
| CN110544932A (en) * | 2019-08-06 | 2019-12-06 | 广州京善电子有限公司 | Method for transforming street lamp power supply system |
| CN112072902A (en) * | 2020-08-28 | 2020-12-11 | 宋喂 | High-frequency induction heating device |
-
2010
- 2010-01-04 CN CN2010100172014A patent/CN102118906A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9386653B2 (en) | 2008-12-12 | 2016-07-05 | O2Micro Inc | Circuits and methods for driving light sources |
| US9030122B2 (en) | 2008-12-12 | 2015-05-12 | O2Micro, Inc. | Circuits and methods for driving LED light sources |
| US9232591B2 (en) | 2008-12-12 | 2016-01-05 | O2Micro Inc. | Circuits and methods for driving light sources |
| US9253843B2 (en) | 2008-12-12 | 2016-02-02 | 02Micro Inc | Driving circuit with dimming controller for driving light sources |
| US8698419B2 (en) | 2010-03-04 | 2014-04-15 | O2Micro, Inc. | Circuits and methods for driving light sources |
| US8866398B2 (en) | 2012-05-11 | 2014-10-21 | O2Micro, Inc. | Circuits and methods for driving light sources |
| GB2503316B (en) * | 2012-06-22 | 2015-10-14 | O2Micro Inc | Circuits and methods for driving light sources |
| GB2503316A (en) * | 2012-06-22 | 2013-12-25 | O2Micro Inc | Circuits and methods for driving light sources |
| CN104753070A (en) * | 2013-12-31 | 2015-07-01 | 深圳市思铭实业有限公司 | High-speed highway LED street lamp or highway LED street lamp line reactive power compensation method |
| CN104812120A (en) * | 2014-01-24 | 2015-07-29 | 潘佩昌 | Road LED illumination DC power supply method |
| CN106058895A (en) * | 2016-08-04 | 2016-10-26 | 三河市汇莹电气设备制造有限公司 | Reactive power compensator |
| WO2018227328A1 (en) * | 2017-06-12 | 2018-12-20 | The University Of Hong Kong | Passive three-phase light-emitting diode drivers |
| CN110544932A (en) * | 2019-08-06 | 2019-12-06 | 广州京善电子有限公司 | Method for transforming street lamp power supply system |
| CN110544932B (en) * | 2019-08-06 | 2023-09-22 | 广州京善电子有限公司 | Street lamp power supply system transformation method |
| CN112072902A (en) * | 2020-08-28 | 2020-12-11 | 宋喂 | High-frequency induction heating device |
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Application publication date: 20110706 |