CN204928133U - Compound chain high pressure active power filter device - Google Patents
Compound chain high pressure active power filter device Download PDFInfo
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- CN204928133U CN204928133U CN201520538946.3U CN201520538946U CN204928133U CN 204928133 U CN204928133 U CN 204928133U CN 201520538946 U CN201520538946 U CN 201520538946U CN 204928133 U CN204928133 U CN 204928133U
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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
The utility model relates to a compound chain high pressure active power filter device, including power, user's load to and locate three chain links between power and the user's load, and its every looks chain link is all parallelly connected including each other, and is used for compensating respectively many strips chain link of different amplitude harmonics, and all chain links all include a plurality of cascaded chain link units in proper order. Compared with the prior art, the utility model discloses every looks chain link all contains many parallelly connected subchain festivals, to mixing the harmonic, can resolve into the harmonic weight of different amplitudes, give mutually in different chain links go the compensation, just so reduced each chain link output current's peak value, be favorable to the safety of device and device, also be favorable to the make full use of of unit capacity, also more convenient on controlling.
Description
Technical field
The utility model relates to a kind of filter, especially relates to a kind of compound chain high voltage active filter.
Background technology
Traditional high voltage active filter generally adopts the mode of cascade to realize, and Figure 1 shows that conventional high-tension chain type active power filter structure figure, and every phase chain link forms to realize high voltage by N number of single-phase H-bridge circuit cascade and exports.In practical application, according to the requirement choose reasonable concatenation unit number N to capacity, output voltage, harmonic wave and cost etc.Each H-bridge unit adopts IGBT as circuit switch device, by the break-make of pulse-width modulation (PWM) technical controlling IGBT, can be the alternating voltage with certain frequency and amplitude by the DC voltage conversion on DC bus capacitor, each H-bridge unit adopts electric capacity to carry out voltage support, is equivalent to an independent DC power supply and powers to a single-phase H bridge inverter; Inverter can adopt Y-connection to form three-phase system.
Each chain link is connected to electrical network through reactor L, and output voltage and line voltage act on inductance two ends and produce the electric current needed; The frequency glitches in reactive current finally can also be exported by linked reactor L filtering inverter.Single-phase chain type Active Power Filter-APF is in series by the H-bridge unit that N number of structure is identical.Therefore the phase voltage often exported mutually is the overlapped in series of N number of unit output voltage.But, power electronic device along with its switching frequency of allowing of increase of capacity more and more lower, so be just faced with the contradiction between devices switch frequency and capacity when APF being used for Large Copacity harmonic compensation.When the harmonic wave of load be the multiple frequency, different amplitude mixed harmonic wave time, if adopt single chain link to compensate, the peak value that may mix harmonic wave can be very large, causes certain difficulty, and also have certain risk to device itself to control and compensation.
Utility model content
The purpose of this utility model be exactly in order to overcome above-mentioned prior art exist defect and a kind of compound chain high voltage active filter is provided.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of compound chain high voltage active filter, comprise power supply, user load, and three chain links be located between power supply and user load, its every phase chain link includes parallel with one another, and for compensating many strips chain link of different amplitude harmonic wave respectively, all chain links include the link units of multiple cascade successively.
The subchain joint number order that described every phase chain link comprises is 2-5 bar.
The subchain joint number order that described every phase chain link comprises is 2.
Described filter also comprises the master controller for controlling the work of each subchain joint, and described master controller saves with all subchains respectively and is connected.
Described master controller comprises:
Harmonic wave Acquisition Circuit, is connected with the output of each phase chain link respectively, for gathering the harmonic wave of each phase;
Harmonic Decomposition circuit, is connected with harmonic wave Acquisition Circuit, and the Harmonic Decomposition for collecting is the harmonic component of different amplitude;
Compensation distribution circuit, saves with Harmonic Decomposition circuit and each subchain respectively and is connected, and is used to indicate each harmonic component that each subchain joint compensates this phase respectively.
Compared with prior art, the utility model has the following advantages:
1) every phase chain link all comprises many subchain joints in parallel, for mixing harmonic wave, Harmonic Decomposition can be become the component of different amplitude, give different chain link mutually to go to compensate, this reduces the peak value of each chain link output current, be conducive to the safety of device and device, be also conducive to making full use of of cell capability, also more convenient in control.
2) the subchain joint number order that every phase chain link comprises is 2, while reduction peak value, also reduces the complexity of Collaborative Control between each phase chain link.
Accompanying drawing explanation
Fig. 1 is the structural representation of conventional high-tension chain type Active Power Filter-APF;
Fig. 2 is structural representation of the present utility model;
Wherein: 1, link units, 2, user load, 3, subchain joint.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.The present embodiment is implemented premised on technical solutions of the utility model, give detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
A kind of compound chain high voltage active filter, as shown in Figure 2, comprise power supply, user load, and three chain links be located between power supply and user load, its every phase chain link includes parallel with one another, and for compensating many strips chain link 3 of different amplitude harmonic wave respectively, all chain links include the link units 1 of multiple cascade successively.
It is 2-5 bar that the subchain that every phase chain link comprises saves 3 numbers, is specially 2 in the present embodiment.
Filter also comprises the master controller for controlling each subchain joint 3 work, and master controller saves 3 with all subchains respectively and is connected, and master controller comprises:
Harmonic wave Acquisition Circuit, is connected with the output of each phase chain link respectively, for gathering the harmonic wave of each phase;
Harmonic Decomposition circuit, is connected with harmonic wave Acquisition Circuit, and the Harmonic Decomposition for collecting is the harmonic component of different amplitude;
Compensation distribution circuit, saves 3 with Harmonic Decomposition circuit and each subchain respectively and is connected, and is used to indicate each harmonic component that each subchain joint 3 compensates this phase respectively.
High voltage active electric-power filter involved by the utility model is a kind of novel multiplex chain high voltage active electric filter device.With traditional high voltage active electric-power filter unlike, this device is the chain structure of a multiplex, and namely each phase can compose in parallel in each chain link by multiple chain link, is composed in series by several link units.
Novel multiple chain high voltage active electric filter device involved by the utility model, by the connection in series-parallel of link units, not only can reduce the requirement to device specification capacity, and can according to the element number needing selection suitable of actual conditions.
Filter involved by the utility model, can reduce the peak factor of every phase compensation harmonic.When the harmonic wave of load be the multiple frequency, different amplitude mixed harmonic wave time, if adopt single chain link to compensate, the peak value that may mix harmonic wave can be very large, causes certain difficulty, and also have certain risk to device itself to control and compensation.The utility model filter, for mixing harmonic wave, Harmonic Decomposition can be become the component of different amplitude, give subchain joints 3 different mutually to go to compensate, this reduces the peak value that each subchain saves 3 output currents, be conducive to the safety of device and device, be also conducive to making full use of of cell capability, also more convenient in control.
The utility model filter also can improve the compensation precision of every phase, for the chain high voltage active filter of a list chain link, the outlet reactor of its every phase choose the impact simultaneously must considering ripple current and current changing rate, therefore reactance value is a result considered, if offset current is excessive or too small, all can have an impact to compensation precision.And the current rating of each subchain joint 3 is compared and is only had the chain link of a sub-chain link will be much little in the utility model, corresponding reactance value will be relatively much little, such ripple current and current changing rate also can be greatly improved relative to strand joint, thus can improve compensation precision.
Claims (5)
1. a compound chain high voltage active filter, comprise power supply, user load, and three chain links be located between power supply and user load, it is characterized in that, its every phase chain link includes parallel with one another, and for compensating many strips chain link (3) of different amplitude harmonic wave respectively, all chain links include the link units (1) of multiple cascade successively.
2. the compound chain high voltage active filter of one according to claim 1, is characterized in that, subchain joint (3) number that described every phase chain link comprises is 2-5 bar.
3. the compound chain high voltage active filter of one according to claim 2, is characterized in that, subchain joint (3) number that described every phase chain link comprises is 2.
4. the compound chain high voltage active filter of one according to claim 1, it is characterized in that, described filter also comprises the master controller worked for controlling each subchain joint (3), and described master controller saves (3) respectively and is connected with all subchains.
5. the compound chain high voltage active filter of one according to claim 4, it is characterized in that, described master controller comprises:
Harmonic wave Acquisition Circuit, is connected with the output of each phase chain link respectively;
Harmonic Decomposition circuit, is connected with harmonic wave Acquisition Circuit;
Compensation distribution circuit, saves (3) with Harmonic Decomposition circuit and each subchain respectively and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520538946.3U CN204928133U (en) | 2015-07-23 | 2015-07-23 | Compound chain high pressure active power filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520538946.3U CN204928133U (en) | 2015-07-23 | 2015-07-23 | Compound chain high pressure active power filter device |
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| Publication Number | Publication Date |
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| CN204928133U true CN204928133U (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520538946.3U Active CN204928133U (en) | 2015-07-23 | 2015-07-23 | Compound chain high pressure active power filter device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374476A (en) * | 2015-07-23 | 2017-02-01 | 利思电气（上海）有限公司 | Composite chain-type high-voltage active filtering device |
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2015
- 2015-07-23 CN CN201520538946.3U patent/CN204928133U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374476A (en) * | 2015-07-23 | 2017-02-01 | 利思电气（上海）有限公司 | Composite chain-type high-voltage active filtering device |
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