CN106374729A - High-voltage balance DC-side power supply of chain type high-voltage active filtering apparatus - Google Patents
High-voltage balance DC-side power supply of chain type high-voltage active filtering apparatus Download PDFInfo
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- CN106374729A CN106374729A CN201510437223.9A CN201510437223A CN106374729A CN 106374729 A CN106374729 A CN 106374729A CN 201510437223 A CN201510437223 A CN 201510437223A CN 106374729 A CN106374729 A CN 106374729A
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- voltage
- link units
- power supply
- balance
- side power
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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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- Direct Current Feeding And Distribution (AREA)
Abstract
The invention relates to a high-voltage balance DC-side power supply of a chain type high-voltage active filtering apparatus. The high-voltage balance DC-side power supply comprises multiple chain link units which are all successively connected in series, and further comprises multiple voltage-sharing circuits, wherein the two ends of each voltage-sharing circuit are connected respectively with two adjacent chain link units for balancing voltages of the two adjacent chain link units. Compared to the prior art, a voltage balance between the two adjacent chain link units is realized through the voltage-sharing circuits, and thus voltage equalization and stabilization of a whole DC side can be realized accordingly.
Description
Technical field
The present invention relates to a kind of balance of voltage technology, especially relate to a kind of electricity of chain high voltage active filter
Flatten weighing apparatus DC side power supply.
Background technology
The main circuit of chain high voltage active filter, the DC side of its every phase includes multiple connection of the form by series connection
The link units being tied, these link units do not consume active power in ideal conditions, can be preferably
Maintain balance.But in actual applications, due to performance difference of element etc. in shunt loss and each link unit
Many reasons, causing each link unit uneven, thus leading to output voltage and current distortion, being connected to filtering
Switching device voltage unbalanced stress after device, even burns the safety that switching device jeopardizes whole system.It is based on
This is it is necessary to carry out the balance of voltage to each link unit.
Content of the invention
The purpose of the present invention is exactly to overcome the defect of above-mentioned prior art presence to provide a kind of chain high voltage to have
The balance of voltage DC side power supply of source filter.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of balance of voltage DC side power supply of chain high voltage active filter, comprising:
Link units, are provided with multiple altogether, and all link units are sequentially connected in series；
Also include:
Equalizer circuit, is provided with multiple altogether, and its two ends is connected with two adjacent link units respectively, for balancing phase
The voltage of adjacent two link units.
Fewer than the number of link units one of the number of described equalizer circuit, and the adjacent link units of each two are all logical
Cross an equalizer circuit to connect.
Described equalizer circuit includes energy storage inductor, energy transfer electric capacity and two p-channel field effect transistor,
The source electrode of one p-channel field effect transistor one end and the rearmounted link units with energy transfer electric capacity respectively
Negative pole connect, drain electrode be connected with the source electrode of another p-channel field effect transistor and one end of energy storage inductor respectively,
The drain electrode of another p-channel field effect transistor other end and the preposition link units with energy transfer electric capacity respectively
Positive pole connect,
The other end of described energy storage inductor is connected with the negative pole of preposition link units and the positive pole of rearmounted link units respectively
Connect.
Described two p-channel field effect transistor are mosfet.
The all respective reverse parallel connection of described two p-channel field effect transistor has a diode.
Compared with prior art, the invention has the advantages that
1) between two neighboring link units, the balance of voltage is carried out by equalizer circuit, and then can realize entirely straight
Flow the electric voltage equalization of side and stablize.
2) the adjacent link units of each two are all connected by an equalizer circuit, can improve voltage equalizing.
3) utilize two p-channel field effect transistor and the mode of energy transfer electric capacity, both meet lossless substantially will
Ask, achieve the equilibrium between each link units again, simultaneously and not using special complicated energy conversion device, knot
Structure is simple, realize easily and safeguard that extension is convenient.
4) low cost of mosfet.
5) two p-channel field effect transistor all each reverse parallel connection have a diode, can be with effective protection p-channel
Field effect transistor.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of equalizer circuit；
Wherein: 1, user load, 2, link units, 3, equalizer circuit, 21, preposition link units, 22,
Rearmounted link units.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with the technology of the present invention side
Implemented premised on case, given detailed embodiment and specific operating process, but the protection model of the present invention
Enclose and be not limited to following embodiments.
A kind of balance of voltage DC side power supply of chain high voltage active filter, as shown in Figure 1, comprising:
Link units 2, are provided with multiple altogether, and all link units 2 are sequentially connected in series；
Also include:
Equalizer circuit 3, is provided with multiple altogether, and its two ends is connected with two adjacent link units 2 respectively, for putting down
The voltage of the two neighboring link units 2 that weigh, fewer than the number of link units 2 one of the number of equalizer circuit 3, and
The adjacent link units of each two 2 are all connected by an equalizer circuit 3.
As shown in Fig. 2 equalizer circuit 3 includes energy storage inductor l1, energy transfer electric capacity c1 and two p-channel
Field effect transistor q1, q2, the source electrode of one of p-channel field effect transistor q1 respectively with energy transfer electric capacity c1
One end and rearmounted link units 22 negative pole connect, drain electrode respectively with another p-channel field effect transistor q2
One end of source electrode and energy storage inductor l1 connects, and the drain electrode of another p-channel field effect transistor q2 is turned with energy respectively
Move the other end of electric capacity c1 and the positive pole of preposition link units 21 connect, the other end of energy storage inductor l1 respectively with
The positive pole of the negative pole of preposition link units 21 and rearmounted link units 22 connects, the negative pole of preposition link units 21
Connect with the positive pole of rearmounted link units 22.
Two p-channel field effect transistor q1, q2 are mosfet, and two p-channel field effect transistor q1, q2
All each reverse parallel connection has a diode, respectively d1 and d2, additionally, each link units 2 is positive and negative
All it is connected to protection electric capacity between pole.
Energy transfer between two link units 2 is mainly realized by energy transfer electric capacity c1.If preposition chain
The voltage of section unit 21 is more than the voltage of rearmounted link units 22, then turn on q1, now c1 will be unnecessary
Energy is transferred in rearmounted link units 22 by q1 and l1, and rearmounted link units 22 are also to l1 transfer
Move energy, form charging and discharging circuit；And when q1 turns off, d2 turn on, preposition link units 21 further through
D2 charges to c1, and l1 by oneself, transfer in rearmounted link units 22 by d2 by the energy through storage simultaneously, this
Sample be achieved that switch periods from preposition link units 21 to the energy transfer of rearmounted link units 22.
Claims (5)
1. the balance of voltage DC side power supply of a kind of chain high voltage active filter, comprising:
Link units, are provided with multiple altogether, and all link units are sequentially connected in series；
It is characterized in that, also include:
Equalizer circuit, is provided with multiple altogether, and its two ends is connected with two adjacent link units respectively, for balancing phase
The voltage of adjacent two link units.
2. the balance of voltage DC side power supply of a kind of chain high voltage active filter according to claim 1,
It is characterized in that, fewer than the number of link units one of the number of described equalizer circuit, and the adjacent chain link of each two
Unit is all connected by an equalizer circuit.
3. the balance of voltage DC side power supply of a kind of chain high voltage active filter according to claim 1,
It is characterized in that, described equalizer circuit includes energy storage inductor, energy transfer electric capacity and two p-channel field effect transistor,
The source electrode of one p-channel field effect transistor one end and the rearmounted link units with energy transfer electric capacity respectively
Negative pole connect, drain electrode be connected with the source electrode of another p-channel field effect transistor and one end of energy storage inductor respectively,
The drain electrode of another p-channel field effect transistor other end and the preposition link units with energy transfer electric capacity respectively
Positive pole connect,
The other end of described energy storage inductor is connected with the negative pole of preposition link units and the positive pole of rearmounted link units respectively
Connect.
4. the balance of voltage DC side power supply of a kind of chain high voltage active filter according to claim 3,
It is characterized in that, described two p-channel field effect transistor are mosfet.
5. the balance of voltage DC side power supply of a kind of chain high voltage active filter according to claim 3,
It is characterized in that, all respective reverse parallel connection of described two p-channel field effect transistor has a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510437223.9A CN106374729A (en) | 2015-07-23 | 2015-07-23 | High-voltage balance DC-side power supply of chain type high-voltage active filtering apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510437223.9A CN106374729A (en) | 2015-07-23 | 2015-07-23 | High-voltage balance DC-side power supply of chain type high-voltage active filtering apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106374729A true CN106374729A (en) | 2017-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510437223.9A Pending CN106374729A (en) | 2015-07-23 | 2015-07-23 | High-voltage balance DC-side power supply of chain type high-voltage active filtering apparatus |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723879A (en) * | 2012-06-15 | 2012-10-10 | 中电普瑞电力工程有限公司 | Converter valve component voltage-sharing capacitor designing method |
| CN102780227A (en) * | 2012-08-08 | 2012-11-14 | 西安交通大学 | Chained static compensator (STATCOM) direct-current-side voltage controlling method and controlling circuit based on voltage-sharing capacitor |
| CN103401253A (en) * | 2013-08-14 | 2013-11-20 | 深圳市英威腾电气股份有限公司 | SVG power unit circuit, chained SVG power unit circuit and static voltage-sharing method |
| CN103633872A (en) * | 2013-12-17 | 2014-03-12 | 山东大学 | Capacitor voltage self-balancing circuit of modularized multi-level converter |
| CN204928563U (en) * | 2015-07-23 | 2015-12-30 | 利思电气（上海）有限公司 | Balance of voltage direct current side power of chain high pressure active power filter device |
-
2015
- 2015-07-23 CN CN201510437223.9A patent/CN106374729A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723879A (en) * | 2012-06-15 | 2012-10-10 | 中电普瑞电力工程有限公司 | Converter valve component voltage-sharing capacitor designing method |
| CN102780227A (en) * | 2012-08-08 | 2012-11-14 | 西安交通大学 | Chained static compensator (STATCOM) direct-current-side voltage controlling method and controlling circuit based on voltage-sharing capacitor |
| CN103401253A (en) * | 2013-08-14 | 2013-11-20 | 深圳市英威腾电气股份有限公司 | SVG power unit circuit, chained SVG power unit circuit and static voltage-sharing method |
| CN103633872A (en) * | 2013-12-17 | 2014-03-12 | 山东大学 | Capacitor voltage self-balancing circuit of modularized multi-level converter |
| CN204928563U (en) * | 2015-07-23 | 2015-12-30 | 利思电气（上海）有限公司 | Balance of voltage direct current side power of chain high pressure active power filter device |
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Application publication date: 20170201 |