CN109194169A - A kind of novel three level grid-connected inverter of three-phase active NPC type - Google Patents
A kind of novel three level grid-connected inverter of three-phase active NPC type Download PDFInfo
- Publication number
- CN109194169A CN109194169A CN201811012998.1A CN201811012998A CN109194169A CN 109194169 A CN109194169 A CN 109194169A CN 201811012998 A CN201811012998 A CN 201811012998A CN 109194169 A CN109194169 A CN 109194169A
- Authority
- CN
- China
- Prior art keywords
- power switching
- power
- switching
- novel
- connect
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 238000010248 power generation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
-
- H02J3/383—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of novel three level grid-connected inverters of three-phase active NPC type, including direct-current input power supplying, three rectifying bridge arms, two capacitors and filter, described two capacitor series connection are connect with direct-current input power supplying, three rectifying bridge arm parallel connections and two capacitance connections, the output end of three rectifying bridge arms is connect with filter, and the rectifying bridge arm includes six device for power switching；Novel three level grid-connected inverter of three-phase active NPC type of one kind of the invention, which has, not to be needed to increase dead time, the advantages of reducing harmonic content, reduce switching loss, adjusted inversion efficiency, introduces the stability that anti-bypass structure improves system.
Description
Technical field
The present invention relates to field of photovoltaic power generation, and in particular to a kind of novel three level parallel network reverse of three-phase active NPC type
Device.
Background technique
Photovoltaic power generation is the best way currently with solar energy.Its advantage be mainly reflected in its spatter property, safety,
Popularity, practicability, the adequacy of resource and potential economy etc. are above.However, photovoltaic power generation also has energy density low, account for
The deficiencies of ground area is big, and climate such environmental effects are big, and system cost is high and disadvantage.Photovoltaic generating system is in addition to by photovoltaic electric
Except pond component, semiconductor processing technology and output filter structure influence, weight of the photovoltaic DC-to-AC converter as photovoltaic generating system
Component part is wanted, the height of transfer efficiency also directly affects entire photovoltaic generating system, therefore, in order to guarantee photovoltaic system
It operates normally, seems particularly significant to the selection of inverter topology.The topological structure of inverter will can be realized non-simultaneously
The requirement such as the efficient, inexpensive of isolated form photovoltaic combining inverter, low-leakage current and high reliability.
Gird-connected inverter presently, there are system reliabilities it is low, filter is bulky the disadvantages of, lead to the original of these problems
Because be greatly existing inverter topology existing defects, filter design is unreasonable, control precision is dry by non-ideal condition
It disturbs.Three-phase clamper type inverter topology is in practice using relatively broad.However its there are same bridge arm lower power tubes
Straight-through damage problem, seriously affects the reliability of inverter work.
Currently, to solve the problems, such as that photovoltaic combining inverter reduces system reliability because straight-through dangerous, the skill used
Art, which mainly has, increases dead time and change topological structure.
Summary of the invention
In view of this, the present invention provides a kind of novel three-phase active NPC to solve above-mentioned the problems of the prior art
Three level grid-connected inverter of type has and does not need to increase dead time, reduce harmonic content, reduce switching loss, adjusts
The advantages of inversion efficiency, introduces the stability that anti-bypass structure improves system.
To achieve the above object, technical scheme is as follows.
A kind of novel three level grid-connected inverter of three-phase active NPC type, including direct-current input power supplying, three rectifier bridges
Arm, two capacitors and filter, the series connection of described two capacitors are connect with direct-current input power supplying, three rectifying bridge arm parallel connections and
The output end of two capacitance connections, three rectifying bridge arms is connect with filter, and the rectifying bridge arm includes that six power are opened
Device is closed, the first device for power switching and the connection of the second device for power switching in one of rectifying bridge arm, second function
Rate switching device is connect with filter, and the third device for power switching is connect with the 4th device for power switching, the 4th function
Rate switching device is connect with filter, and the 5th device for power switching is arranged in the first device for power switching and the second power switch device
Between part, the 6th device for power switching is arranged between third device for power switching and the 4th device for power switching, and the described 5th
Device for power switching is connect with the 6th device for power switching, and the 5th device for power switching is for maintaining the first power switch device
Part and the second device for power switching both end voltage are equal, and the 6th device for power switching is for maintaining third device for power switching
It is equal with the 4th device for power switching both end voltage.
Further, freewheeling diode is equipped in the device for power switching.
Further, the capacitance of described two capacitors is equal, equal for the output voltage of direct-current input power supplying to be divided into
Two parts.
Further, the structure of three rectifying bridge arms is all the same.
Compared with the prior art, novel three level grid-connected inverter of three-phase active NPC type of one kind of the invention has not
The advantages of increasing dead time, reducing harmonic content, reduce switching loss, adjusted inversion efficiency is needed, is introduced anti-straight-through
Structure improves the stability of system.
Detailed description of the invention
Fig. 1 is the circuit diagram of novel three level grid-connected inverter of three-phase active NPC type of one kind of the invention.
Specific embodiment
Specific implementation of the invention is described further below in conjunction with attached drawing and specific embodiment.It may be noted that
Being, if having the symbol or process of not special detailed description with attached drawing below, is that those skilled in the art are referred to existing skill
Art understand or realize.Described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, for the circuit signal of novel three level grid-connected inverter of three-phase active NPC type of one kind of the invention
Figure, including direct-current input power supplying Vdc, three rectifying bridge arms, two capacitors and filter, described two capacitor series connection are defeated with direct current
Enter power supply Vdc connection, three rectifying bridge arm parallel connections and two capacitance connections, the output end of three rectifying bridge arms and filter
The connection of wave device, the rectifying bridge arm include six device for power switching, the first device for power switching Sx1 in rectifying bridge arm and the
Two device for power switching Sx2 connections, the second device for power switching Sx2 are connect with filter, the third power switch device
Part Sx3 is connect with the 4th device for power switching Sx4, and the 4th device for power switching Sx4 is connect with filter, and the 5th power is opened
It closes device Sx5 to be arranged between the first device for power switching Sx1 and the second device for power switching Sx2, the 6th device for power switching
Sx6 is arranged between third device for power switching Sx3 and the 4th device for power switching Sx4, the 5th device for power switching
Sx5 is connect with the 6th device for power switching Sx6, and the 5th device for power switching Sx5 is for maintaining the first device for power switching
Sx1 and the second device for power switching Sx2 both end voltage are equal, and the 6th device for power switching Sx6 is for maintaining third power
Switching device Sx3 (x a, b or c) equal with the 4th device for power switching Sx4 both end voltage.
Preferably, freewheeling diode is equipped in the device for power switching.
Preferably, the capacitance of described two capacitors is equal, equal for the output voltage of direct-current input power supplying Vdc to be divided into
Two parts are Udc/2.
Preferably, the structure of three rectifying bridge arms is all the same.
Relative to DC side midpoint O, there are three types of current potentials, i.e. forward voltage Udc/2, negative voltage-Udc/2 and no-voltage, originally
These three states are denoted as P-state, O state and N-state respectively in scheme, and there are four types of the nought states of redundancy for O state, respectively
It is denoted as OU1, OU2, OL1, OL2；By working time and the job order of reasonably distributing these four redundancy nought states
Control the loss balancing of each switching device.It as shown in table 1, is the switch state of each rectifying bridge arm, wherein 1 indicates switching tube
Open-minded, 0 indicates switching tube shutdown.
The switch state of the every phase bridge arm of the active NPC type topology of table 1
When state P, when Sa1, Sa2, Sa6 are connected and electric current flows out rectifying bridge arm, electric current will pass through Sa1, Sa2 stream at this time
To load, path is Sa1 to Sa2.If realizing, the change of current of P to OL2 then needs first to close for traditional NPC type inverter
Disconnected Sa2, the electric current for flowing through Sa2 at this time will be reduced slowly, and when flowing through the electric current of Sa2 and being reduced to 0, due to afterflow, electric current will be through
It crosses Sa6 to Da3 and forms new path, exporting current potential at this time is O；Sa3 conducting is triggered after dead time, is completed primary complete
The change of current.If the problem of not calculating dead time, directly triggering Sa3 conducting during afterflow, it will make between Sa1, Sa2, Sa3
Cause straight-through phenomenon.And the advantage of the topological structure in the present invention is embodied in, if continued in the case where calculating dead time
Directly triggering Sa3 conducting during stream, since the structure between Sa2 and Sa3 is the connection type disconnected, so Sa2, Sa3 are not
It will appear above situation.
It does not need to increase in conclusion a kind of novel three level grid-connected inverter of three-phase active NPC type of the invention has
The advantages of adding dead time, reducing harmonic content, reduce switching loss, adjusted inversion efficiency, introduces anti-bypass structure and mentions
The high stability of system.
Claims (4)
1. a kind of novel three level grid-connected inverter of three-phase active NPC type, including direct-current input power supplying (Vdc), three rectifications
Bridge arm, two capacitors and filter, described two capacitor series connection are connect with direct-current input power supplying (Vdc), three rectifier bridges
Arm parallel connection and two capacitance connections, the output end of three rectifying bridge arms are connect with filter, it is characterised in that: the rectification
Bridge arm includes six device for power switching, the first device for power switching (Sa1) and the second power in one of rectifying bridge arm
Switching device (Sa2) connection, second device for power switching (Sa2) connect with filter, the third device for power switching
(Sa3) it is connect with the 4th device for power switching (Sa4), the 4th device for power switching (Sa4) connect with filter, the 5th function
Rate switching device (Sa5) is arranged between the first device for power switching (Sa1) and the second device for power switching (Sa2), the 6th function
Rate switching device (Sa6) is arranged between third device for power switching (Sa3) and the 4th device for power switching (Sa4), and described the
Five device for power switching (Sa5) are connect with the 6th device for power switching (Sa6), and the 5th device for power switching (Sa5) is used for
Maintain the first device for power switching (Sa1) and the second device for power switching (Sa2) both end voltage equal, the 6th power switch
Device (Sa6) is for maintaining third device for power switching (Sa3) equal with the 4th device for power switching (Sa4) both end voltage.
2. novel three level grid-connected inverter of three-phase active NPC type of one kind according to claim 1, it is characterised in that:
Freewheeling diode is equipped in the device for power switching.
3. novel three level grid-connected inverter of three-phase active NPC type of one kind according to claim 1, it is characterised in that:
The capacitance of described two capacitors is equal, for the output voltage of direct-current input power supplying (Vdc) to be divided into equal two parts.
4. novel three level grid-connected inverter of three-phase active NPC type of one kind according to claim 1, it is characterised in that:
The structure of three rectifying bridge arms is all the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012998.1A CN109194169A (en) | 2018-08-31 | 2018-08-31 | A kind of novel three level grid-connected inverter of three-phase active NPC type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012998.1A CN109194169A (en) | 2018-08-31 | 2018-08-31 | A kind of novel three level grid-connected inverter of three-phase active NPC type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109194169A true CN109194169A (en) | 2019-01-11 |
Family
ID=64917450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811012998.1A Pending CN109194169A (en) | 2018-08-31 | 2018-08-31 | A kind of novel three level grid-connected inverter of three-phase active NPC type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109194169A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912134A (en) * | 2019-11-29 | 2020-03-24 | 中国船舶重工集团公司第七一九研究所 | Multi-level active power filter with low harmonic content |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186904A (en) * | 2015-07-03 | 2015-12-23 | 上海交通大学 | CoolMosfet neutral point-clamped I-type tri-level topology circuit and inverter |
| CN105337524A (en) * | 2015-11-25 | 2016-02-17 | 安徽大学 | Balance control method for tri-level active neutral point clamped photovoltaic inverter switching losses |
-
2018
- 2018-08-31 CN CN201811012998.1A patent/CN109194169A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186904A (en) * | 2015-07-03 | 2015-12-23 | 上海交通大学 | CoolMosfet neutral point-clamped I-type tri-level topology circuit and inverter |
| CN105337524A (en) * | 2015-11-25 | 2016-02-17 | 安徽大学 | Balance control method for tri-level active neutral point clamped photovoltaic inverter switching losses |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912134A (en) * | 2019-11-29 | 2020-03-24 | 中国船舶重工集团公司第七一九研究所 | Multi-level active power filter with low harmonic content |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017031991A1 (en) | Series hybrid bipolar direct-current transmission system having direct-current fault ride-through capability | |
| WO2016206547A1 (en) | Hybrid direct current transmission system | |
| WO2015165191A1 (en) | Steady state control method for three-phase double-mode inverter | |
| WO2021218227A1 (en) | Modular capacitor commutated converter and method | |
| US20180166883A1 (en) | Low voltage ride-through control system and method for multi-inverter grid-connected power converter | |
| CN103715930B (en) | A kind of method promoting flexible direct current power transmission system capacity | |
| US10075092B2 (en) | Neutral point power converter with first and second chopper cell groups | |
| WO2024066832A1 (en) | Pid effect suppression system | |
| WO2023134225A1 (en) | Low-frequency power transmission system and control mode therefor | |
| CN115000978A (en) | H-bridge cascaded STATCOM direct-current side voltage double-frequency fluctuation suppression method | |
| WO2024183693A1 (en) | Positive and negative bipolar modular multilevel ac-ac converter | |
| CN106469915A (en) | A kind of photovoltaic combining inverter self adaptation dynamic reactive compensating method | |
| CN109194169A (en) | A kind of novel three level grid-connected inverter of three-phase active NPC type | |
| Ohnuma et al. | Space vector modulation for a single phase to three phase converter using an active buffer | |
| Xiong et al. | Modeling and operating characteristic analysis of MMC-SST based shipboard power system | |
| CN114710015B (en) | Multi-output mode inverter and control method thereof | |
| KR20210069439A (en) | Power converting apparatus and photovoltaic module including the same | |
| TW201434254A (en) | Three-phase feedforward inductive current control device and the control method thereof | |
| EP2897267A2 (en) | Power conversion apparatus and photovoltaic module including the same | |
| Xiao et al. | A single-phase grid-connected PV inverter with improved grid-connected current | |
| JP2015095926A (en) | Power conversion system and first charging method therefor | |
| CN113078655A (en) | Electrolytic capacitor-free cascade H-bridge STATCOM system and control method | |
| CN112398360A (en) | Single-phase three-level micro photovoltaic inverter and open-loop control method and system thereof | |
| Feng et al. | Research on hybrid DC-link capacitor bank with high efficiency and long-life time | |
| KR20210115783A (en) | Power converting apparatus and photovoltaic module including the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190111 |
|
| RJ01 | Rejection of invention patent application after publication |