CN104753073B - A kind of reactive-load compensation equipment driven with LED constant current - Google Patents
A kind of reactive-load compensation equipment driven with LED constant current Download PDFInfo
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- CN104753073B CN104753073B CN201510145519.3A CN201510145519A CN104753073B CN 104753073 B CN104753073 B CN 104753073B CN 201510145519 A CN201510145519 A CN 201510145519A CN 104753073 B CN104753073 B CN 104753073B
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- reactive compensation
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- 239000003990 capacitor Substances 0.000 claims abstract description 44
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- 238000005286 illumination Methods 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000001939 inductive effect Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention provides a kind of reactive-load compensation equipment driven with LED constant current, including the three-phase main-frequency AC-powered being sequentially connected, reactive compensation capacitor, three-phase commutation bridge, LCL is filtered and LED light group, wherein three-phase main-frequency alternating current is each switchs the one end for connecting a reactive compensation capacitor by one, the other end of reactive compensation capacitor is then connected to the midpoint of the corresponding bridge arm of three-phase commutation bridge three-phase input side, in reactive compensation capacitor close to the side of rectifier bridge, it is provided with two switches, when two switches are closed at conducting, three reactive compensation capacitor formation Y-connections.The present invention can provide reactive-load compensation, and the LED of rear class is driven without using electrochemical capacitor, long lifespan, complicated controller is not needed, it is easy to later maintenance to overhaul, possess important use value needing the place of reactive-load compensation, it is adaptable to using the factory building of a large amount of inductive loads, the occasion of reactive-load compensation and illumination is needed using power distribution station of transformer etc..
Description
Technical field
The present invention relates to electric and electronic technical field, specifically a kind of reactive-load compensation equipment driven with LED constant current.
Background technology
In recent years, energy-conservation is always a hot issue, since Eleventh Five-Year Plan, and relevant government department is always very
Pay attention to energy-saving and emission-reduction work.And in energy-saving and emission-reduction, it is important that a ring be exactly electric consumption on lighting energy-conservation.Nowadays, countries in the world are all
Used progressively forbidding the sale of incandescent lamp, it is clear that incandescent lamp has not adapted to the demand in epoch.And LED brightness is high,
Efficiency high, long lifespan, small volume under such historical background, can just replace other lighting apparatus, realize the mesh of energy-saving and emission-reduction
's.LED is Light Emitting Diode abbreviation, and Chinese entitled light emitting diode, is semiconductor diode, can only be unidirectional
Conducting, if directly driving LED using industrial-frequency alternating current, performance is just poor, and this is accomplished by special LED driving equipments and comes real
Existing LED illumination.LED, as one kind of diode, is non-linear element, general to be driven using current constant mode.Now on the market
Through there are many LED illumination devices, wherein being much all based on the drive system of Switching Power Supply, conduct is exchanged using single phase industrial frequence
Input power, by uncontrollable rectifier, what is had is also possible to addition PFC to obtain DC voltage, then becomes by DC/DC
Parallel operation realizes that constant current output drives LED, generally requires to use the steady commutating voltage of electrochemical capacitor.And electrochemical capacitor life is general
Within 10,000 hours, and it is affected by temperature seriously, this and the LED life-span of more than 50,000 hours are not suitable with.Certainly, there is also nothing
The drive scheme of electrochemical capacitor, but the power section topological structure of these schemes, drive control part hardware and software all compared with
For complexity, overhaul unfavorable for later maintenance, this is also one of the reason for LED illumination is not popularized also.
In whole power network, there is the electrical equipments such as motor, transformer, and these loads belong to inductive load, when this
During a little inductive load work, lagging reactive power can be produced, this is accomplished by reactive power compensation, and provides the dress of reactive-load compensation
Put, referred to as reactive-load compensation equipment.This kind equipment can provide reactive power, improve the power factor (PF) of power network, reduce the nothing of power network
Work(electric current, this just reduces loss of the energy on electrical grid transmission circuit and supply transformer, also reduces the current stress of circuit.
And this equally also complies with the requirement of energy-saving and emission-reduction.
The content of the invention
The present invention in order to solve problem of the prior art there is provided it is a kind of with LED constant current drive reactive-load compensation equipment,
It is on the basis of reactive-load compensation is provided, and the approximate constant current drive parts of LED of rear class have abandoned electrochemical capacitor, without complicated control
Device processed, is easy to later maintenance to overhaul.
The present invention includes the three-phase main-frequency AC-powered being sequentially connected, reactive compensation capacitor, three-phase commutation bridge, LCL filters
The each one end that a reactive compensation capacitor is connected by a switch of ripple and LED light group, wherein three-phase main-frequency alternating current, nothing
The other end of work(compensating electric capacity is then connected to the midpoint of the corresponding bridge arm of three-phase commutation bridge three-phase input side, in reactive compensation capacitor
Close to the side of rectifier bridge, two switches are provided with, when two switches are closed at conducting, three reactive compensation capacitors are formed
Y-connection.
The upper limit of the power of described LED light group is the 10%-15% of reactive compensation capacity.
Described LCL filter uses thin-film capacitor.
LED light group structure is referred to as parallel connection LED lamp group using packet series parallel structure connection by each group, then by each group
Parallel connection LED lamp group is connected in series, and using the switch being in parallel with every group of parallel connection LED lamp group, that realizes LED opens shut-off.
Beneficial effect of the present invention is：
1st, reactive-load compensation can be provided, will design the LED power upper limit is 10% to the 15% or so of reactive compensation capacity, right
Reactive compensation capacity influence is smaller, while there is provided LED illumination.
2nd, decompression and approximate constant current are realized using reactive compensation capacitor, without using transformer, without transformer iron loss and magnetic
Stagnant loss, the electromagnetic interference of generation is few.
3rd, rear class LED drives approximate constant current, and bringing onto load scope is wide, anti-loading short circuit, safe.
4th, rear class LED drive parts, circuit is simple, without using control chip and semiconductor switch device, it is contemplated that these
Place is accomplished by reactive power compensator in itself, realizes LED illumination on this basis, thus disregard reactive power compensator into
This, reduces cost, and not easy break-down, and Maintenance and Repair are convenient.
5th, LED drive parts, abandon electrochemical capacitor, make while the life-span of reactive-load compensation capacitor can meet LED completely
With life requirements, last a long time.
Brief description of the drawings
Fig. 1 is electrical block diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Electrical block diagram of the present invention is as shown in figure 1, three-phase main-frequency AC-powered, idle benefit including being sequentially connected
Electric capacity, three-phase commutation bridge, LCL filtering and LED light group are repaid, wherein three-phase main-frequency alternating current is each connects one by a switch
One end of individual reactive compensation capacitor, the other end of reactive compensation capacitor is then connected to the corresponding bridge of three-phase commutation bridge three-phase input side
The midpoint of arm, in reactive compensation capacitor close to the side of rectifier bridge, is provided with two switches, when two switches are closed at conducting
When, three reactive compensation capacitor formation Y-connections.In order to meet use demand, suitably flexibly some can be set to switch.
Specific embodiments of the present invention are as follows：
(1) reactive compensation capacitor is appraised and decided
Reactive compensation power is calculated according to specifically used occasion, then calculates the size of reactive compensation capacitor, electric capacity is noted
Device must be adjusted according to Y-connection mode, because the accounting of reactive-load compensation has had many data and document may be referred to
Design, here is omitted.
(2) upper limit of the power of LED drivings is appraised and decided
Because the present invention is also intended to borrow for there is the place of reactive-load compensation and lighting demand, specific LED drive circuit
Reactive compensation capacitor is helped to realize, what the upper limit of the power that LED drives also was determined by reactive compensation capacity, therefore, first to appraise and decide power
The upper limit.Certainly have a little it is to be noted that the electric capacity of reactive-load compensation will realize reactive-load compensation according to Y-connection mode.Take into account
Both reactive compensation capacity and LED power outputs, can take 10% to the 15% or so of reactive compensation capacity, defeated as LED
Go out the upper limit of the power, so the influence very little for reactive compensation capacity.Operate complex in some induction equipments and measure larger
When, reactive-load compensation can be realized using multigroup reactive compensation capacitor, if the LED power needed under the occasion need not be all idle
10% to the 15% of compensation capacity, then can take one of which or several groups to realize that LED drives, the upper limit of the power just uses this group
Or several groups adjust.
(3) connected mode of reactive compensation capacitor and rear class
It is exactly that should not connected together with the side wiring of the reactive compensation capacitor of Y-connection in fact, but will
They are connected to the midpoint of each bridge arm of three-phase commutation bridge.As shown in figure 1, as correct connected mode.
(4) LCL filter
LCL filter needs the requirement according to actual use occasion to LED current ripple to be designed, and particularly points out herein
Filter capacitor uses thin-film capacitor, and ripple has just met requirement, without using electrochemical capacitor.Due to the design of LCL filter
There are many data and document may be referred to design, here is omitted.
(5) LED lamp group design
LED light group structure is referred to as parallel connection LED lamp group using packet series parallel structure connection by each group, then by each group
Parallel connection LED lamp group is connected in series, and using the switch being in parallel with every group of parallel connection LED lamp group, that realizes LED opens shut-off.
It is arranged according to the lighting requirement of specific occasion, one group of parallel connection LED number is determined by reactive compensation capacitor,
Reactive compensation capacitor determines the value of output current, and this electric current will be fully allocated to LED (the commonly referred to herein as parallel connections of parallel connection
LED groups), it is allowed to all be operated in running current.It is of course possible to determine the parallel branch in each group according to actual conditions
The LED numbers of upper concatenation, but the LED numbers of concatenation all should be consistent, the LED light group in such as Fig. 1 on each group, just
2 LED have been concatenated on each branch road of each parallel connection LED group.
The specific calculation procedure of quantity of every group of parallel connection LED lamp group is as follows：
1. calculate reactive compensation capacitor capacitive reactance(wherein f is industrial-frequency alternating current frequency, and C is the nothing of each phase
Work(compensating electric capacity value).
2. calculate rectified output current average value(wherein UrmsIt is phase voltage virtual value).
3. calculate every group of parallel connection LED quantity(wherein ILEDIt is the upper current limit of each LED normal works).
N obtained by calculating is exactly suitable value substantially, it is of course possible to parallel connection LED quantity n is slightly repaiied according to actual conditions
Change, be finally again connected in series each group of parallel connection LED, notice that series connection group number can not make its LED illumination power output exceed accounting
Higher limit afterwards.Switch is then arranged on the two ends of each parallel connection LED lamp group.Switch off, the parallel connection LED group is connected into total
Loop, LED is lighted, and parallel connection LED group short circuit is gone out total loop to switch closure by this, closes LED.Specifically refer to Fig. 1.
(6) general structure is assembled
By reactive compensation capacitor, three-phase commutation bridge, LCL filtering and this four part of LED light group, along with necessary switch,
Assembled according to Fig. 1, you can realize the present invention.
Concrete application approach of the present invention is a lot, and described above is only the preferred embodiment of the present invention, it is noted that for
For those skilled in the art, under the premise without departing from the principles of the invention, some improvement can also be made, this
A little improve also should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of reactive-load compensation equipment driven with LED constant current, it is characterised in that：Including the three-phase main-frequency exchange being sequentially connected
Electric power supply, reactive compensation capacitor, three-phase commutation bridge, LCL filtering and LED light group, the wherein each phase of three-phase main-frequency alternating current pass through
One end of one switch one reactive compensation capacitor of connection, the other end of reactive compensation capacitor is then connected to three-phase commutation bridge three-phase
The midpoint of the corresponding bridge arm of input side, in reactive compensation capacitor close to the side of rectifier bridge, is provided with two switches, first is opened
The end closed is connected on first reactive compensation capacitor and in the wiring of corresponding rectifier bridge bridge arm, first the another of switch terminates at
Second reactive compensation capacitor with the wiring of corresponding rectifier bridge bridge arm, second switch an end be connected on second reactive-load compensation
Electric capacity with the wiring of corresponding rectifier bridge bridge arm, second switch it is another terminate at the 3rd reactive compensation capacitor with it is corresponding whole
In the wiring for flowing bridge bridge arm, when two switches are closed at conducting, three reactive compensation capacitor formation Y-connections.
2. the reactive-load compensation equipment according to claim 1 driven with LED constant current, it is characterised in that：Described LED
The upper limit of the power of group is the 10%-15% of reactive compensation capacity.
3. the reactive-load compensation equipment according to claim 1 driven with LED constant current, it is characterised in that：Described LCL filters
Ripple device uses thin-film capacitor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510145519.3A CN104753073B (en) | 2015-03-30 | 2015-03-30 | A kind of reactive-load compensation equipment driven with LED constant current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510145519.3A CN104753073B (en) | 2015-03-30 | 2015-03-30 | A kind of reactive-load compensation equipment driven with LED constant current |
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| CN104753073A CN104753073A (en) | 2015-07-01 |
| CN104753073B true CN104753073B (en) | 2017-09-12 |
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| CN201510145519.3A Active CN104753073B (en) | 2015-03-30 | 2015-03-30 | A kind of reactive-load compensation equipment driven with LED constant current |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108011534B (en) * | 2017-11-20 | 2019-07-19 | 浙江电牛电气有限公司 | Three-phase electric control system and current transformer, inverter and electric compensation device |
| CN108650728A (en) * | 2018-04-02 | 2018-10-12 | 申高帅 | A kind of LED lamp drive circuit of High Power Factor |
| CN110933802A (en) * | 2018-09-18 | 2020-03-27 | 群光电能科技股份有限公司 | Alternating current direct drive light-emitting device and LED light-emitting group thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201718077U (en) * | 2010-01-08 | 2011-01-19 | 徐子叨 | Energy saving lamp controller |
| CN103379700A (en) * | 2012-04-27 | 2013-10-30 | 许立江 | Novel LED energy-saving indicator light utilizing reactive energy |
| CN203850837U (en) * | 2014-02-19 | 2014-09-24 | 天津市国民制药机械有限公司 | Three-phase reactive power compensation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2013073837A (en) * | 2011-09-28 | 2013-04-22 | Tnk:Kk | Illumination device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201718077U (en) * | 2010-01-08 | 2011-01-19 | 徐子叨 | Energy saving lamp controller |
| CN103379700A (en) * | 2012-04-27 | 2013-10-30 | 许立江 | Novel LED energy-saving indicator light utilizing reactive energy |
| CN203850837U (en) * | 2014-02-19 | 2014-09-24 | 天津市国民制药机械有限公司 | Three-phase reactive power compensation device |
Non-Patent Citations (1)
| Title |
|---|
| 用于有源电力滤波器谐波和无功电流检测的一种改进同步参考坐标法;陈东华等;《中国电机工程学报》;20051031;第25卷(第20期);第62-67页 * |
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