CN205248817U - Reactive compensation main circuit - Google Patents
Reactive compensation main circuit Download PDFInfo
- Publication number
- CN205248817U CN205248817U CN201521142172.9U CN201521142172U CN205248817U CN 205248817 U CN205248817 U CN 205248817U CN 201521142172 U CN201521142172 U CN 201521142172U CN 205248817 U CN205248817 U CN 205248817U
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- CN
- China
- Prior art keywords
- contactor
- main circuit
- phase lines
- phase
- reactive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000001012 protector Effects 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- 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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- Inverter Devices (AREA)
Abstract
The utility model discloses a reactive compensation main circuit has solved the technical problem that dydt is very big of the switching element bearing among the current reactive compensation main circuit, the utility model discloses reactive compensation main circuit, including three phase lines, zero line and three level contravariant modules, three phase lines and a zero line meet with three level contravariant modules, and three phase lines are held from the phase line inlet wire and have all been concatenated fuse, ac contactor and two pairs of inductance in proper order to three level contravariant module directions, and three phase lines have all concatenated the condenser between two pairs of inductance, and three condenser all concatenates a resistance, and the zero line is all connected to three resistance.
Description
Technical field
The utility model relates to a kind of reactive-load compensation main circuit.
Background technology
The reactive-load compensation main circuit of current reactive power compensator adopts two-level inverter conventionally, and two level are contraryBecome the dy/dt stress that the middle switching device in device bears very large, and the EMI characteristic that makes reactive-load compensation main circuit alsoNot good.
Utility model content
Technical problem to be solved in the utility model is just to provide reactive-load compensation main circuit, solves existing nothingThe very large technical problem of dy/dt of the switching device load-bearing in merit main compensation circuit.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
Reactive-load compensation main circuit, comprises three phase lines, zero line and tri-level inversion module, three phase linesJoin with a zero line and tri-level inversion module, three phase lines are from phase line end of incoming cables to tri-level inversion moduleDirection is all serially connected with fuse, A.C. contactor and two pairs of inductance successively, and three phase lines are between two pairs of inductanceAll be serially connected with capacitor, three capacitors are all connected in series a resistance, and three resistance all connect zero line.
Further, described tri-level inversion module comprises three blocks of inversion plates in parallel, every inversion plate correspondenceConnect a phase line, described inversion plate comprises four fly-wheel diodes of serial connection mutually, each fly-wheel diodeOn be connected with an IGBT switch, two fly-wheel diodes in the middle of being positioned at are parallel with two phase place diodes.
Further, described A.C. contactor comprise the first A.C. contactor of being serially connected in three phase lines andBe parallel to the second A.C. contactor of the first A.C. contactor, described the second A.C. contactor is exchanging with firstIn the parallel circuit of contactor, be serially connected with current-limiting resistance.
Further, described three phase lines are connected with Surge Protector between fuse and A.C. contactor,Described Surge Protector is by ground protection line ground connection.
The beneficial effects of the utility model are:
1, by tri-level inversion module is set in reactive-load compensation main circuit, due to the increase of level number,Under identical DC bus-bar voltage condition, the dy/dt that the switching device in reactive-load compensation main circuit bears greatlyReduce, also improved reactive-load compensation main circuit EMI characteristic simultaneously;
2, the increase of level number, has improved output electric wave waveform, has reduced output voltage and current waveform distortion;
3, can obtain the output electricity identical with two-level inverter under high switching frequency with lower switching frequencyPiezoelectricity ripple, thus switching loss reduced, improve the efficiency of reactive-load compensation main circuit.
Concrete technique effect of the present utility model will be further described in detailed description of the invention.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described further:
Fig. 1 is the circuit diagram of the utility model reactive-load compensation main circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is elaborated.
As shown in Figure 1, reactive-load compensation main circuit, comprises that three phase lines 11, zero line 12 and three level are contraryChange 2, three phase lines 11 of module and a zero line 12 join with tri-level inversion module 2, three phase lines 11All be serially connected with successively fuse 3, A.C. contactor 4 and from phase line end of incoming cables to tri-level inversion module 2 directions5, three phase lines 11 of two pairs of inductance are all serially connected with 6, three capacitors 6 of capacitor between two pairs of inductance 5All be connected in series 61, three resistance 61 of a resistance and all connect zero line 12.
Tri-level inversion module 2 comprises three blocks of inversion plates in parallel, a phase line of the every corresponding connection of inversion plate,Inversion plate comprises four fly-wheel diodes of serial connection mutually, is connected with an IGBT and opens on each fly-wheel diodeClose, two fly-wheel diodes in the middle of being positioned at are parallel with two phase place diodes.
The level number of the tri-level inversion module that reactive-load compensation main circuit adopts increases, at identical dc busUnder voltage conditions, the dy/dt that the switching device in reactive-load compensation main circuit bears greatly reduces, and also changes simultaneouslyBe apt to reactive-load compensation main circuit EMI characteristic; And the increase of level number, improve output electric wave waveform, subtractLittle output voltage and current waveform distortion; Can with lower switching frequency obtain and high switching frequency under twoThe output voltage electric wave that electrical level inverter is identical, thus switching loss reduced, raising reactive-load compensation main circuitEfficiency.
A.C. contactor 4 comprises and is serially connected in the first A.C. contactor 41 in three phase lines 11 and is parallel toThe second A.C. contactor 42, the second A.C. contactors 42 of the first A.C. contactor 41 are exchanging and are connecing with firstIn the parallel circuit of tentaculum 41, be serially connected with current-limiting resistance 43, by the second A.C. contactor 42 and current-limiting resistance43 coordinate, and can increase the applicable current range of the second A.C. contactor 42.
Three phase lines 11 are connected with Surge Protector 7 between fuse 3 and A.C. contactor 4, and surge is protectedProtect device 7 by ground protection line 71 ground connection, can carry out surge protection to reactive-load compensation main circuit like this, carryThe security of high whole circuit.
Be described with regard to the utility model preferred embodiment above, but can not be interpreted as claimRestriction. The utility model is not only confined to above embodiment, and its concrete structure allows to change, this area skillArt personnel can make various changes and distortion according to the utility model, only otherwise depart from essence of the present utility modelGod, all belongs to the defined scope of the utility model claims.
Claims (4)
1. reactive-load compensation main circuit, is characterized in that, comprises three phase lines, zero line and tri-level inversionModule, three phase lines and zero line and tri-level inversion module are joined, three phase lines from phase line end of incoming cables toTri-level inversion module direction is all serially connected with fuse, A.C. contactor and two pairs of inductance, three phase lines successivelyBetween two pairs of inductance, be all serially connected with capacitor, three capacitors are all connected in series a resistance, and three resistance all connectConnecting to neutral line.
2. reactive-load compensation main circuit according to claim 1, is characterized in that, described tri-level inversionModule comprises three blocks of inversion plates in parallel, a phase line of the every corresponding connection of inversion plate, and described inversion plate comprisesFour fly-wheel diodes that are connected in series mutually, are connected with an IGBT switch on each fly-wheel diode, be arranged inBetween two fly-wheel diodes be parallel with two phase place diodes.
3. reactive-load compensation main circuit according to claim 1, is characterized in that, described A.C. contactorComprise being serially connected in the first A.C. contactor in three phase lines and being parallel to second of the first A.C. contactor and hand overStream contactor, described the second A.C. contactor with the parallel circuit of the first A.C. contactor in be serially connected with current limlitingResistance.
4. according to the reactive-load compensation main circuit described in claim 1～3 any one, it is characterized in that, described inThree phase lines are connected with Surge Protector between fuse and A.C. contactor, and described Surge Protector passes throughGround protection line ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521142172.9U CN205248817U (en) | 2015-12-31 | 2015-12-31 | Reactive compensation main circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521142172.9U CN205248817U (en) | 2015-12-31 | 2015-12-31 | Reactive compensation main circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205248817U true CN205248817U (en) | 2016-05-18 |
Family
ID=55947890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521142172.9U Expired - Fee Related CN205248817U (en) | 2015-12-31 | 2015-12-31 | Reactive compensation main circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205248817U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786680A (en) * | 2016-12-31 | 2017-05-31 | 江苏谷峰电力科技股份有限公司 | Low voltage three-phase imbalance self-checking device |
-
2015
- 2015-12-31 CN CN201521142172.9U patent/CN205248817U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786680A (en) * | 2016-12-31 | 2017-05-31 | 江苏谷峰电力科技股份有限公司 | Low voltage three-phase imbalance self-checking device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160518 Termination date: 20211231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |