CN208623335U - A kind of three phase harmonic suppression circuit and power equipment with lightning protection - Google Patents
A kind of three phase harmonic suppression circuit and power equipment with lightning protection Download PDFInfo
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- CN208623335U CN208623335U CN201821064039.XU CN201821064039U CN208623335U CN 208623335 U CN208623335 U CN 208623335U CN 201821064039 U CN201821064039 U CN 201821064039U CN 208623335 U CN208623335 U CN 208623335U
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- harmonic suppression
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- 230000001629 suppression Effects 0.000 title claims abstract description 43
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 6
- 230000001012 protector Effects 0.000 claims description 4
- 208000025274 Lightning injury Diseases 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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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Abstract
A kind of three phase harmonic suppression circuit and power equipment with lightning protection, it includes multiple lightning protection unit for lightning protection pressure release, multiple partial pressure units for partial pressure, multiple fundamental wave filter units and multiple transformer units for being used to offset whole harmonic signal included in power network signal for filtering out fundamental signal included in power network signal, by being arranged, fundamental wave filter unit filters out fundamental signal included in power network signal and transformer offsets whole harmonic signal included in power network signal, whole harmonic signals in power network signal can be eliminated, the fundamental signal of big reverse phase such as one and fundamental signal included in power network signal can be provided to load；Meanwhile it being also provided with lightning protection unit, it can inhibit have the function of preventing lightning stroke while harmonic wave；In addition, the three phase harmonic suppression circuit with lightning protection successfully combines harmonic suppression circuit and lightning protection circuit, it is not only convenient for installing, also reduces the fault point generated when electric appliance connection.
Description
Technical field
The utility model belongs to electric relay protection technical field more particularly to a kind of three phase harmonic with lightning protection inhibits electricity
Road and power equipment.
Background technique
Currently, by installing passive or active filter near harmonic source to achieve the purpose that inhibit harmonic wave；Wherein
Passive filtration unit is RLC series parallel circuit structure, is only capable of filtering specific integer harmonic, is not suitable for harmonic wave scene abundant, and
And should not install excessively, it is easy to produce resonance phenomena；And active filter is by detection circuit, instruction circuit and bridge type inverse
Circuit composition leads to its output signal there are certain distortion and prolongs there are dead time when bridge inverter main circuit works normally
When, and circuit structure complexity can be existed simultaneously to power grid harmonic signal, and it is at high cost, the problems such as maintenance difficult.In addition,
Harmonic suppression apparatus is mounted on the influence on device line vulnerable to lightning stroke, and leads to Line over-voltage easily after being struck by lightning and make the electricity in circuit
Hold damage.
Therefore, the harmonic suppression circuit presence in traditional technical solution cannot completely inhibit harmonic wave and cannot prevent from being struck by lightning
The problem of.
Utility model content
The utility model provides a kind of three phase harmonic suppression circuit with lightning protection, it is intended to solve in traditional technical solution
Harmonic suppression circuit there are problems that harmonic wave cannot be completely inhibited and cannot prevent lightning stroke.
The utility model is realized in this way a kind of three phase harmonic suppression circuit with lightning protection, comprising:
It is multiple to be connected between A phase line and ground wire, between B phase line and ground wire, between C phase line and ground wire and zero curve
Lightning protection unit between ground wire, for lightning protection pressure release；
Between multiple input terminals and output end for being series at A phase line, B phase line and C phase line respectively, the partial pressure for partial pressure
Unit；
Between multiple output ends and zero curve for being connected to each partial pressure unit, for filtering out institute in power network signal
The fundamental wave filter unit for the fundamental signal for including；And
Multiple first side windings are connected between A phase line and zero curve, between B phase line and zero curve and C phase line and zero
Between line, secondary side winding be connected to the output end of each partial pressure unit and the output end of A phase line, B phase line it is defeated
Between the output end of outlet and C phase line, for offsetting the transformer unit of whole harmonic signal included in power network signal.
The transformer unit includes first side winding the number of turns and secondary side winding the number of turns phase in one of the embodiments,
Deng transformer.
The lightning protection unit includes surge protector in one of the embodiments,.
The partial pressure unit includes resistance in one of the embodiments,.
The resistance value of the resistance is 1-10 Ω in one of the embodiments,.
The fundamental wave filter unit includes capacitor and inductance in one of the embodiments, and the first end of the capacitor is made
For the fundamental wave filter unit input terminal and connect with the output end of the partial pressure unit, the second end of the capacitor with it is described
The first end of inductance connects, and the second end of the inductance is connect with zero curve.
The fundamental voltage of the output end output of the three phase harmonic suppression circuit with lightning protection in one of the embodiments,
The big reverse phases such as the fundamental signal included in signal and power network signal.
In addition, a kind of power equipment is additionally provided, including the above-mentioned three phase harmonic suppression circuit with lightning protection.
The above-mentioned three phase harmonic suppression circuit with lightning protection is filtered out in power network signal by setting fundamental wave filter unit and is wrapped
The fundamental signal contained, transformer unit offsets whole harmonic signal included in power network signal, so that the three-phase with lightning protection
Harmonic suppression circuit can eliminate whole harmonic signals in power network signal, can by load provide one with wrapped in power network signal
The fundamental signal of the big reverse phase such as fundamental signal contained；Meanwhile it being also provided with lightning protection unit, so that the three phase harmonic suppression with lightning protection
Circuit processed has the function of preventing lightning stroke while being able to suppress harmonic wave；In addition, the three phase harmonic suppression circuit with lightning protection at
Function combines harmonic suppression circuit and lightning protection circuit, is not only convenient for installing, and also reduces the event generated when electric appliance connection
Barrier point.
Detailed description of the invention
Fig. 1 is the module diagram for the three phase harmonic suppression circuit with lightning protection that an embodiment of the present invention provides；
Fig. 2 is the circuit diagram for the three phase harmonic suppression circuit with lightning protection that another embodiment of the utility model provides.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 shows the module diagram of the harmonic suppression circuit with lightning protection of the utility model preferred embodiment offer,
For ease of description, only the parts related to this embodiment are shown, and details are as follows:
With reference to Fig. 1, a kind of three phase harmonic suppression circuit with lightning protection, comprising: multiple lightning protection unit 10, multiple partial pressure units
20, multiple fundamental wave filter units 30 and multiple transformer units 40.
Wherein, multiple lightning protection unit 10 be connected between A phase line and ground wire, between B phase line and ground wire, C phase line and
Between ground wire and between zero curve and ground wire, it to be used for lightning protection pressure release；Multiple partial pressure units 20 be series at respectively A phase line, B phase line with
And between the input terminal and output end of C phase line, for dividing；Multiple fundamental wave filter units 30 are connected to each partial pressure unit
Between 20 output end and zero curve, for filtering out fundamental signal included in power network signal；The one of multiple transformer units 40
Secondary side winding is connected between A phase line and zero curve, between B phase line and zero curve and between C phase line and zero curve, secondary side around
Group is connected to the defeated of the output end of multiple partial pressure units 20 and the output end of A phase line, the output end of B phase line and C phase line
Between outlet, for offsetting whole harmonic signal included in power network signal.
Fig. 2 is referred in one of the embodiments, and transformer unit 40 includes first side winding the number of turns and secondary side winding
The transformer T1 of equal turn numbers.In the present embodiment, transformer offsets whole harmonic signal included in power network signal, so that
The three phase harmonic suppression circuit with lightning protection can eliminate whole harmonic signals in power network signal.
Fig. 2 is referred in one of the embodiments, and each lightning protection unit 10 includes surge protector G1.In the present embodiment
In, each surge protector G1 is connected between A phase line input terminal and ground wire, between B phase line input terminal and ground wire, C phase
Between line input terminal and ground wire and between zero curve and ground wire, it not only can protect all first devices of three phase harmonic suppression circuit
Part can also protect the equipment connecting with the three phase harmonic suppression circuit without having received voltage damages.
Fig. 2 is referred in one of the embodiments, and each partial pressure unit 20 includes resistance R1, and the resistance value of resistance R1 is 1-
10Ω.In the present embodiment, the partial pressure effect of resistance R1, can make 1 end of first side winding and the secondary side winding 2 of transformer T1
The current potential at end differs, so that transformer T1 be made to work normally.
Fig. 2 is referred in one of the embodiments, and each fundamental wave filter unit 30 includes capacitor C1 and inductance L1, capacitor
The first end of C1 as fundamental wave filter unit 30 input terminal and connect with the output end of partial pressure unit 20, the second end of capacitor C1
It is connect with the first end of inductance L1, the second end of inductance L1 is connect with zero curve.
The fundamental voltage signal of the output end output of three phase harmonic suppression circuit with lightning protection in one of the embodiments,
With the big reverse phase such as fundamental signal included in power network signal.
Its working principle is illustrated for the three phase harmonic suppression circuit by shown in Fig. 2 with lightning protection below, is described in detail
It is as follows:
Since the upper component and connection relationship of A phase line, B phase line and C phase line is all the same, their work is former
It manages all the same, is illustrated by taking A phase line as an example below, from the power network signal u exported between A phase line and zero curves1Believe including fundamental wave
Number usb1The harmonic signal u constituted with a variety of different frequenciessh1, therefore:
us1=usb1+ush1
It is parallel to due to the first side winding of transformer T1 between the output end of A phase line and the output end of zero curve, become
The voltage at the first side winding both ends 1,1 ' of depressor T1 is equal to us1, and due to first side winding the number of turns and secondary side of transformer T1
Umber of turn is equal, therefore the voltage u at the secondary side winding both ends 2,2 ' of transformer T1s2With us1It is equal, wherein us2Including usb2
And ush2, it may be assumed that
us2=usb2+ush2
And usb1With usb2It is equal, ush1With ush2It is equal.
From the power network signal u exported between A phase line and zero curves1It include fundamental signal u by the signal that resistance R1 is transmittedsb1
With harmonic signal ush1, as described in Figure 2, when by a point, fundamental signal usb1It is bypassed and is shorted by fundamental wave filter unit 30, then electricity
Net signal us1There was only harmonic signal u after a pointsh1, i.e., the voltage signal exported between a and d two o'clock is harmonic signal ush1.It takes
Abcd is as circuit and sets clockwise as the direction of circuit abcd, then the voltage expression of circuit abcd are as follows:
us2+u0-ush1=0
Wherein, u0For power network signal us1Believed after the transformer T1 with lightning protection by the output after three phase harmonic suppression circuit
Number, then:
u0=ush1-us2=ush1-(usb2+ush2)=ush1-(usb2+ush1)=- usb2=-usb1
Therefore, harmonic signal ush1By harmonic signal u when by transformer T1sh2It offsets, i.e. power network signal us1By band
Final output signal only has fundamental signal u after the three phase harmonic suppression circuit of lightning protectionsb1, and power network signal us1The base of middle output
Wave signal usb1Etc. big reverse phase.
In addition, a kind of power equipment is additionally provided, including the above-mentioned three phase harmonic suppression circuit with lightning protection.
The utility model has the beneficial effects that
1, fundamental signal included in power network signal is filtered out by the way that fundamental wave filter unit is arranged, transformer unit offsets electricity
Whole harmonic signal included in net signal enables the three phase harmonic suppression circuit with lightning protection to eliminate in power network signal
Whole harmonic signals, the fundamental wave of the big reverse phase such as one and fundamental signal included in power network signal can be provided believe to load
Number.
2, it is also provided with lightning protection unit, so that tool while the three phase harmonic suppression circuit with lightning protection is able to suppress harmonic wave
There is the function of preventing lightning stroke.
3, the three phase harmonic suppression circuit with lightning protection successfully combines harmonic suppression circuit and lightning protection circuit, no
It is only easily installed, also reduces the fault point generated when electric appliance connection.
4, the three phase harmonic suppression circuit circuit structure with lightning protection is simple, at low cost.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (8)
1. a kind of three phase harmonic suppression circuit with lightning protection characterized by comprising
It is multiple be connected between A phase line and ground wire, between B phase line and ground wire, between C phase line and ground wire and zero curve and ground
Lightning protection unit between line, for lightning protection pressure release；
Partial pressure list between multiple input terminals and output end for being series at A phase line, B phase line and C phase line respectively, for partial pressure
Member；
Between multiple output ends and zero curve for being connected to each partial pressure unit, for filtering out included in power network signal
Fundamental signal fundamental wave filter unit；And
Multiple first side windings are connected between A phase line and zero curve, between B phase line and zero curve and C phase line and zero curve it
Between, secondary side winding is connected to the output end of the output end of each partial pressure unit and the output end of A phase line, B phase line
And between the output end of C phase line, for offsetting the transformer unit of whole harmonic signal included in power network signal.
2. the three phase harmonic suppression circuit with lightning protection as described in claim 1, which is characterized in that the transformer unit includes
The transformer of first side winding the number of turns and secondary side winding equal turn numbers.
3. the three phase harmonic suppression circuit with lightning protection as described in claim 1, which is characterized in that the lightning protection unit includes electricity
Surge protector.
4. the three phase harmonic suppression circuit with lightning protection as described in claim 1, which is characterized in that the partial pressure unit includes electricity
Resistance.
5. the three phase harmonic suppression circuit with lightning protection as claimed in claim 4, which is characterized in that the resistance value of the resistance is 1-
10Ω。
6. the three phase harmonic suppression circuit with lightning protection as described in claim 1, which is characterized in that the fundamental wave filter unit packet
Include capacitor and inductance, the first end of the capacitor is as the input terminal of the fundamental wave filter unit and defeated with the partial pressure unit
Outlet connection, the second end of the capacitor are connect with the first end of the inductance, and the second end of the inductance is connect with zero curve.
7. such as the three phase harmonic suppression circuit as claimed in any one of claims 1 to 6 with lightning protection, which is characterized in that the band is anti-
The fundamental wave included in the fundamental voltage signal and power network signal of the output end output of the three phase harmonic suppression circuit of thunder is believed
Number etc. big reverse phase.
8. a kind of power equipment, which is characterized in that including the described in any item three phase harmonic suppressions with lightning protection of claim 1 to 7
Circuit processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821064039.XU CN208623335U (en) | 2018-07-05 | 2018-07-05 | A kind of three phase harmonic suppression circuit and power equipment with lightning protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821064039.XU CN208623335U (en) | 2018-07-05 | 2018-07-05 | A kind of three phase harmonic suppression circuit and power equipment with lightning protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208623335U true CN208623335U (en) | 2019-03-19 |
Family
ID=65704966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821064039.XU Active CN208623335U (en) | 2018-07-05 | 2018-07-05 | A kind of three phase harmonic suppression circuit and power equipment with lightning protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208623335U (en) |
-
2018
- 2018-07-05 CN CN201821064039.XU patent/CN208623335U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200615 Address after: 4 / F, No.18, Yangmen Industrial Zone, Xili Dakan, Nanshan District, Shenzhen, Guangdong 518055 Patentee after: SHENZHEN VOLE INDUSTRIAL Co.,Ltd. Address before: 518000 Daqing Building, Chegongmiao, Futian District, Shenzhen City, Guangdong Province, 31st Floor Patentee before: Huang Hongwei |