CN204392098U - A kind of Monophase electric power electronic transformer and application system thereof - Google Patents
A kind of Monophase electric power electronic transformer and application system thereof Download PDFInfo
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- CN204392098U CN204392098U CN201520123342.2U CN201520123342U CN204392098U CN 204392098 U CN204392098 U CN 204392098U CN 201520123342 U CN201520123342 U CN 201520123342U CN 204392098 U CN204392098 U CN 204392098U
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Abstract
The utility model discloses a kind of Monophase electric power electronic transformer and application system thereof, belong to power electronics field of conversion of electrical energy, mainly solve that existing electric power electric transformer transformation of electrical energy progression is many, efficiency is low, poor reliability and realize the deficiencies such as high-voltage applications difficulty.This Monophase electric power electronic transformer comprises 2 high-frequency isolation DC/DC modules, can realize single-phase isolation AC/AC convert and isolation AC/DC conversion by electric interconnection.Meanwhile, three-phase AC/AC type electric power electric transformer and three-phase AC/DC type electric power electric transformer can be realized by the combination of Monophase electric power electronic transformer.Monophase electric power electronic transformer and application system thereof are based on modularized design, have that structure is simple, operation and maintenance is convenient, efficiency is high, cost is low, good reliability, conveniently can expand to the features such as high pressure applications, power transformer, the rectifier of isolation and inverter can be widely used in.
Description
Technical field
The utility model relates to a kind of Monophase electric power electronic transformer and application system thereof, belong to power electronics transformation of electrical energy technical field, particularly realize the isolation pressure regulation conversion of AC to AC, the isolation pressure regulation conversion of AC-to DC, direct current to the conversion of interchange isolation voltage regulation and frequency modulation, be particularly useful for power transformer, rectifier and inverter system.
Background technology
The advantages such as traditional power transformer is simple with its structure, cost is low, efficiency is high, good reliability, remain the major measure realizing transformation of electrical energy at present.But along with the continuous deterioration of the problems such as harmonic current, reactive current and unsymmetrical current in electrical network, the running wastage of traditional power transformer is given prominence to, and transformer fault rate obviously promotes.In addition, traditional power transformer, because its volume is large, function singleness, cannot meet following a large amount of access of distributed energy and the requirements at the higher level of charging electric vehicle.
Along with the develop rapidly of power electronic technology, the seventies in last century, realizing the another kind of mode of transformation of electrical energy---the concept of electric power electric transformer (PET) or solid-state transformer (SST) is suggested.Experienced by the development of more than 40 year, the research of electric power electric transformer deepens continuously, present stage the topology of electric power electric transformer be divided into single step arrangement, two-layer configuration and tertiary structure, the progression of cascade is more, and function is abundanter.But existing electric power electric transformer also exists that reliability is low, efficiency is low, control is complicated and high in cost of production problem, and existing scheme to realize high-voltage applications also very complicated.
Summary of the invention
The purpose of this utility model is to overcome the above problems and provides a kind of high efficiency Monophase electric power electronic transformer and application system thereof.This Monophase electric power electronic transformer and application system thereof mainly realize based on high efficiency high-frequency isolation DC/DC converter, meet the isolation pressure regulation conversion of AC to AC, the isolation pressure regulation conversion of AC-to DC, direct current convert to exchanging isolation voltage regulation and frequency modulation.
The utility model adopts following technical scheme.
A kind of Monophase electric power electronic transformer, comprise 2 identical high-frequency isolation DC/DC modules, it is characterized in that, the DC terminal of a pair same polarity in former limit of 2 high-frequency isolation DC/DC modules is joined together to form former limit center terminal, its another to the DC terminal of the same polarity former limit ac terminal as Monophase electric power electronic transformer; The DC terminal of secondary a pair same polarity of 2 high-frequency isolation DC/DC modules is joined together to form secondary center terminal, its another to the DC terminal of the same polarity secondary ac terminal as Monophase electric power electronic transformer.
Monophase electric power electronic transformer as above, it is characterized in that, described high-frequency isolation DC/DC module comprises M identical high-frequency isolation DC/DC submodule, and the former limit DC side of each high-frequency isolation DC/DC submodule and secondary DC side are all parallel with diode; The connected mode of M high-frequency isolation DC/DC submodule is the DC side parallel secondary DC side series connection of former limit or former limit DC side series connection secondary DC side parallel; High-frequency isolation DC/DC submodule is made up of the parallel connection of N number of high-frequency isolation DC/DC converter, i.e. the former limit DC side parallel of N number of high-frequency isolation DC/DC converter, simultaneously its secondary DC side parallel.
Monophase electric power electronic transformer as above, is characterized in that, described high-frequency isolation DC/DC converter comprises half-bridge circuit, high frequency transformer, high-frequency inductor and electric capacity; High frequency transformer m former limit winding and n vice-side winding are wound on a magnetic core, and share a magnetic circuit; Winding one end, high frequency transformer each former limit is through high-frequency inductor L
sphalf-bridge circuit mid point corresponding to it connects, the electric capacity C of former limit winding
hpand C
lpbe connected in parallel on corresponding former limit half-bridge circuit DC bus after series connection, its series connection mid point is connected with this former limit winding other end; Each vice-side winding one end of high frequency transformer is through high-frequency inductor L
ssthe half-bridge circuit mid point corresponding with it connects, the electric capacity C of vice-side winding
hsand C
lsbe connected in parallel on corresponding secondary half-bridge circuit DC bus after series connection, its series connection mid point is connected with this vice-side winding other end; The former limit m of a high frequency transformer half-bridge circuit DC bus is connected successively according to both positive and negative polarity, and high frequency transformer secondary n half-bridge circuit DC bus is connected successively according to both positive and negative polarity.
Monophase electric power electronic transformer as above, is characterized in that, also comprises 2 single phase alternating current (A.C.) filters and single-phase converter; The former limit ac terminal of Monophase electric power electronic transformer and secondary ac terminal respectively with being connected of the single phase alternating current (A.C.) filter of former limit and secondary; The ac terminal of single-phase converter is connected with the secondary ac terminal of Monophase electric power electronic transformer simultaneously.
Monophase electric power electronic transformer as above, is characterized in that, the secondary ac terminal of Monophase electric power electronic transformer links together, and forms the secondary DC side terminal of Monophase electric power electronic transformer together with secondary center terminal.
Monophase electric power electronic transformer described as mentioned above, is characterized in that, also comprise single phase alternating current (A.C.) filter and DC filter; Single phase alternating current (A.C.) filter is connected with the former limit ac terminal of Monophase electric power electronic transformer; DC filter is connected with the secondary DC terminal of Monophase electric power electronic transformer.
A kind of three-phase AC/AC type electric power electric transformer application system, comprises three-phase alternating current filter and is connected selector with △/Y, it is characterized in that, also comprise Monophase electric power electronic transformer as above; The former limit ac terminal of 3 Monophase electric power electronic transformers connects selector through the former limit △/Y of series connection and is connected with the crossing filter in former limit three; The secondary ac terminal of 3 Monophase electric power electronic transformers connects being connected of selector filter crossing with secondary three through the secondary △/Y of series connection.
Three-phase AC/AC type electric power electric transformer application system as above, is characterized in that, also comprise 3-phase power converter; 3-phase power converter is connected in parallel on three crossing filters and is connected on selector connecting line with △/Y.
A kind of three-phase AC/DC type electric power electric transformer application system, comprises three-phase alternating current filter and is connected selector with △/Y, it is characterized in that, also comprise Monophase electric power electronic transformer as above; The former limit ac terminal of 3 Monophase electric power electronic transformers connects selector through the △/Y of series connection and is connected with three-phase alternating current filter; The secondary DC terminal of 3 Monophase electric power electronic transformers is directly in parallel one to one; Secondary DC terminal is connected with DC filter.
The utility model structure is simple, and based on modularized design, operation and maintenance is convenient, and efficiency is high, and cost is low, good reliability, conveniently can expand to high pressure applications.
Accompanying drawing explanation
Fig. 1 is a kind of Monophase electric power electronic transformer shown in the utility model.
Fig. 2 is a kind of high-frequency isolation DC/DC module shown in the utility model.
Fig. 3 is a kind of high-frequency isolation DC/DC submodule shown in the utility model.
Fig. 4 is a kind of high-frequency isolation DC/DC converter shown in the utility model.
Fig. 5 is the Monophase electric power electronic transformer of a kind of band filter shown in the utility model.
Fig. 6 is a kind of AC/DC Monophase electric power electronic transformer shown in the utility model.
Fig. 7 is the AC/DC Monophase electric power electronic transformer of a kind of band filter shown in the utility model.
Fig. 8 is the AC/AC three-phase power electronic transformer application system of a kind of band filter shown in the utility model.
Fig. 9 is the AC/DC three-phase power electronic transformer application system of a kind of band filter shown in the utility model.
Figure 10 is the △ type syndeton that the △/Y shown in the utility model connects selector.
Figure 11 is the Y type syndeton that the △/Y shown in the utility model connects selector.
Embodiment
Below by way of embodiment, the utility model is described in further detail by reference to the accompanying drawings.
A kind of Monophase electric power electronic transformer shown in Fig. 1, comprise 2 identical high-frequency isolation DC/DC module No.1 and No.2, the DC terminal of a pair former limit positive polarity of 2 high-frequency isolation DC/DC modules is joined together to form former limit center terminal O
p, its another to the DC terminal of the former limit negative polarity former limit ac terminal A as Monophase electric power electronic transformer
pand N
p; The DC terminal of secondary a pair negative polarity of 2 high-frequency isolation DC/DC modules is joined together to form secondary center terminal O
s, its another to the DC terminal of the positive polarity secondary ac terminal A as Monophase electric power electronic transformer
sand N
s.
A kind of high-frequency isolation DC/DC module shown in Fig. 2, comprise the individual identical high-frequency isolation DC/DC submodule of M, the former limit DC side series connection of M high-frequency isolation DC/DC submodule, namely the negative pole of former limit DC side k and the positive pole of former limit DC side k+1 link together, k changes to M-1 from 1, and the positive pole of former limit DC side 1 and the negative pole of former limit DC side M form the former limit DC terminal of high-frequency isolation DC/DC module; The secondary DC side parallel of M high-frequency isolation DC/DC submodule, namely the positive pole of the individual identical high-frequency isolation DC/DC submodule secondary DC side of M links together, and the negative pole pole of the individual identical high-frequency isolation DC/DC submodule secondary DC side of M links together, and form the secondary DC terminal of high-frequency isolation DC/DC module.
A kind of high-frequency isolation DC/DC submodule shown in Fig. 3, comprise high-frequency isolation DC/DC converter and 2 diodes of N number of parallel connection, namely the former limit DC side parallel of N number of high-frequency isolation DC/DC converter forms the former limit DC terminal of high-frequency isolation DC/DC submodule, simultaneously the secondary DC side also secondary DC terminal forming high-frequency isolation DC/DC submodule in parallel; The former limit of high-frequency isolation DC/DC submodule and each diode in parallel of the DC terminal of secondary, the anode of diode is connected with its negative polarity d. c terminal, and the negative electrode of diode is connected with its positive polarity DC terminal.
A kind of high-frequency isolation DC/DC converter shown in Fig. 4, comprises half-bridge circuit, high frequency transformer, high-frequency inductor and electric capacity; M the former limit winding of high frequency transformer Tx and n vice-side winding are wound on a magnetic core, and share a magnetic circuit.Winding one end, high frequency transformer each former limit is through high-frequency inductor L
sphalf-bridge circuit mid point A corresponding to it connects, the electric capacity C of former limit winding
hpand C
lpbe connected in parallel on corresponding former limit half-bridge circuit DC bus after series connection, its series connection mid point B is connected with this former limit winding other end; Each vice-side winding one end of high frequency transformer is through high-frequency inductor L
ssthe half-bridge circuit mid point a corresponding with it connects, the electric capacity C of vice-side winding
hsand C
lsbe connected in parallel on corresponding secondary half-bridge circuit DC bus after series connection, its series connection mid point b is connected with this vice-side winding other end; The former limit m of a high frequency transformer half-bridge circuit DC bus is connected successively according to both positive and negative polarity, and high frequency transformer secondary n half-bridge circuit DC bus is connected successively according to both positive and negative polarity.
High-frequency isolation DC/DC converter can be forward converter, anti exciting converter, controlled resonant converter and phase-shifted full-bridge converter, and other realizes the high-frequency isolation DC/DC converter of isolated DC conversion.
The Monophase electric power electronic transformer of a kind of band filter shown in Fig. 5, comprises 2 single phase alternating current (A.C.) filters, the Monophase electric power electronic transformer shown in single-phase converter and Fig. 1; The former limit ac terminal of Monophase electric power electronic transformer and secondary ac terminal respectively with being connected of the single phase alternating current (A.C.) filter of former limit and secondary; The ac terminal of single-phase converter is connected with the secondary ac terminal of Monophase electric power electronic transformer simultaneously.Single-phase converter mainly realizes the functions such as harmonic wave control, no-power compensation function and energy storage peak load shifting, also can at single-phase converter DC side access energy storage, photovoltaic and wind power generation etc.
A kind of AC/DC Monophase electric power electronic transformer shown in Fig. 6, for the Monophase electric power electronic transformer shown in Fig. 1 is by its secondary ac terminal A
sand N
slink together, with secondary center terminal O
sform the secondary DC terminal of Monophase electric power electronic transformer together.
The AC/DC Monophase electric power electronic transformer of a kind of band filter shown in Fig. 7, comprises AC/DC Monophase electric power electronic transformer, single phase alternating current (A.C.) filter and the DC filter shown in Fig. 6; Single phase alternating current (A.C.) filter is connected with the former limit ac terminal of Monophase electric power electronic transformer; DC filter is connected with the secondary DC terminal of Monophase electric power electronic transformer.
The AC/AC three-phase power electronic transformer application system of a kind of band filter shown in Fig. 8, comprises three-phase alternating current filter, △/Y connects selector, 3-phase power converter and Monophase electric power electronic transformer as shown in Figure 1.The former limit ac terminal of 3 Monophase electric power electronic transformers connects selector through the former limit △/Y of series connection and is connected with the crossing filter in former limit three, and now former limit △/Y connection selector is in the connection of △ type; The secondary ac terminal of 3 Monophase electric power electronic transformers connects being connected of selector filter crossing with secondary three through the secondary △/Y of series connection, and now secondary △/Y connection selector is in Y type and connects; 3-phase power converter is three-phase and four-line, and is connected in parallel on secondary three and intersects filter and be connected on the line between selector with secondary △/Y.3-phase power converter mainly realizes the functions such as harmonic wave control, no-power compensation function and energy storage peak load shifting, also can at 3-phase power converter DC side access energy storage, photovoltaic and wind power generation etc.
The AC/DC three-phase power electronic transformer application system of a kind of band filter shown in Fig. 9, comprises three-phase alternating current filter, △/Y connects the Monophase electric power electronic transformer shown in selector, DC filter and Fig. 6.The former limit ac terminal of 3 Monophase electric power electronic transformers connects selector through the △/Y of series connection and is connected with three-phase alternating current filter, and now △/Y connection selector is in Y type and connects; The secondary DC terminal of 3 Monophase electric power electronic transformers is directly in parallel one to one, i.e. A
s1, A
s2and A
s3link together, secondary DC terminal O
s1, O
s2and O
s3link together; Secondary DC terminal is connected with DC filter.
△/Y shown in Figure 10 connects the △ type syndeton of selector, and 6 ac terminals of 3 Monophase electric power electronic transformers connect in the following manner: terminal A, terminal A
1with terminal N
3link together, terminal B, terminal N
1with terminal A
2link together, terminal C, terminal N
2with terminal A
3link together.△/Y shown in Figure 11 connects the Y type syndeton of selector, and 6 ac terminals of 3 Monophase electric power electronic transformers connect in the following manner: terminal A and terminal A
1link together, terminal B and terminal A
2link together, terminal C and terminal A
3link together, terminal N, terminal N
1, terminal N
2with terminal N
3link together.
Claims (9)
1. a Monophase electric power electronic transformer, comprise 2 identical high-frequency isolation DC/DC modules, it is characterized in that, the DC terminal of a pair same polarity in former limit of 2 high-frequency isolation DC/DC modules is joined together to form former limit center terminal, its another to the DC terminal of the same polarity former limit ac terminal as Monophase electric power electronic transformer; The DC terminal of secondary a pair same polarity of 2 high-frequency isolation DC/DC modules is joined together to form secondary center terminal, its another to the DC terminal of the same polarity secondary ac terminal as Monophase electric power electronic transformer.
2. Monophase electric power electronic transformer according to claim 1, it is characterized in that, described high-frequency isolation DC/DC module comprises M identical high-frequency isolation DC/DC submodule, and the former limit DC side of each high-frequency isolation DC/DC submodule and secondary DC side are all parallel with diode; The connected mode of M high-frequency isolation DC/DC submodule is the DC side parallel secondary DC side series connection of former limit or former limit DC side series connection secondary DC side parallel; High-frequency isolation DC/DC submodule is made up of the parallel connection of N number of high-frequency isolation DC/DC converter, i.e. the former limit DC side parallel of N number of high-frequency isolation DC/DC converter, simultaneously its secondary DC side parallel.
3. Monophase electric power electronic transformer according to claim 2, is characterized in that, described high-frequency isolation DC/DC converter comprises half-bridge circuit, high frequency transformer, high-frequency inductor and electric capacity; High frequency transformer m former limit winding and n vice-side winding are wound on a magnetic core, and share a magnetic circuit; Winding one end, high frequency transformer each former limit is through high-frequency inductor L
sphalf-bridge circuit mid point corresponding to it connects, the electric capacity C of former limit winding
hpand C
lpbe connected in parallel on corresponding former limit half-bridge circuit DC bus after series connection, its series connection mid point is connected with this former limit winding other end; Each vice-side winding one end of high frequency transformer is through high-frequency inductor L
ssthe half-bridge circuit mid point corresponding with it connects, the electric capacity C of vice-side winding
hsand C
lsbe connected in parallel on corresponding secondary half-bridge circuit DC bus after series connection, its series connection mid point is connected with this vice-side winding other end; The former limit m of a high frequency transformer half-bridge circuit DC bus is connected successively according to both positive and negative polarity, and high frequency transformer secondary n half-bridge circuit DC bus is connected successively according to both positive and negative polarity.
4. according to Monophase electric power electronic transformer according to claim 1 or claim 2, it is characterized in that, also comprise 2 single phase alternating current (A.C.) filters and single-phase converter; The former limit ac terminal of Monophase electric power electronic transformer and secondary ac terminal respectively with being connected of the single phase alternating current (A.C.) filter of former limit and secondary; The ac terminal of single-phase converter is connected with the secondary ac terminal of Monophase electric power electronic transformer simultaneously.
5. according to Monophase electric power electronic transformer according to claim 1 or claim 2, it is characterized in that, the secondary ac terminal of Monophase electric power electronic transformer links together, and forms the secondary DC side terminal of Monophase electric power electronic transformer together with secondary center terminal.
6. Monophase electric power electronic transformer according to claim 5, is characterized in that, also comprises single phase alternating current (A.C.) filter and DC filter; Single phase alternating current (A.C.) filter is connected with the former limit ac terminal of Monophase electric power electronic transformer; DC filter is connected with the secondary DC terminal of Monophase electric power electronic transformer.
7. a three-phase AC/AC type electric power electric transformer application system, comprises three-phase alternating current filter and is connected selector with △/Y, it is characterized in that, also comprises as claim 1 or Monophase electric power electronic transformer according to claim 2; The former limit ac terminal of 3 Monophase electric power electronic transformers connects selector through the former limit △/Y of series connection and is connected with the crossing filter in former limit three; The secondary ac terminal of 3 Monophase electric power electronic transformers connects being connected of selector filter crossing with secondary three through the secondary △/Y of series connection.
8. three-phase AC/AC type electric power electric transformer application system according to claim 7, is characterized in that, also comprise 3-phase power converter; 3-phase power converter is connected in parallel on three crossing filters and is connected on selector connecting line with △/Y.
9. a three-phase AC/DC type electric power electric transformer application system, comprises three-phase alternating current filter and is connected selector with △/Y, it is characterized in that, also comprises Monophase electric power electronic transformer as claimed in claim 5; The former limit ac terminal of 3 Monophase electric power electronic transformers connects selector through the △/Y of series connection and is connected with three-phase alternating current filter; The secondary DC terminal of 3 Monophase electric power electronic transformers is directly in parallel one to one; Secondary DC terminal is connected with DC filter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520123342.2U CN204392098U (en) | 2015-03-03 | 2015-03-03 | A kind of Monophase electric power electronic transformer and application system thereof |
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|---|---|---|---|
| CN201520123342.2U CN204392098U (en) | 2015-03-03 | 2015-03-03 | A kind of Monophase electric power electronic transformer and application system thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991042A (en) * | 2015-03-03 | 2016-10-05 | 张良华 | Single-phase power electronic transformer and application system thereof |
| CN106230079A (en) * | 2016-08-10 | 2016-12-14 | 江苏林洋能源股份有限公司 | Split-phase type low-power consumption energy accumulation current converter and control method thereof and control system |
| CN109687717A (en) * | 2019-01-23 | 2019-04-26 | 东南大学 | A kind of power adjustable LC input series and output parallel commutator transformer and control method |
| CN110165896A (en) * | 2019-04-30 | 2019-08-23 | 东南大学 | A kind of commutator transformer and control method based on centralized Multiple coil high frequency transformer |
-
2015
- 2015-03-03 CN CN201520123342.2U patent/CN204392098U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105991042A (en) * | 2015-03-03 | 2016-10-05 | 张良华 | Single-phase power electronic transformer and application system thereof |
| CN106230079A (en) * | 2016-08-10 | 2016-12-14 | 江苏林洋能源股份有限公司 | Split-phase type low-power consumption energy accumulation current converter and control method thereof and control system |
| CN106230079B (en) * | 2016-08-10 | 2019-11-05 | 江苏林洋能源股份有限公司 | Split-phase type low-power consumption energy accumulation current converter and its control method and control system |
| CN109687717A (en) * | 2019-01-23 | 2019-04-26 | 东南大学 | A kind of power adjustable LC input series and output parallel commutator transformer and control method |
| CN109687717B (en) * | 2019-01-23 | 2021-06-22 | 东南大学 | Power-adjustable LC input series output parallel direct current transformer and control method |
| CN110165896A (en) * | 2019-04-30 | 2019-08-23 | 东南大学 | A kind of commutator transformer and control method based on centralized Multiple coil high frequency transformer |
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