CN112072942B - An Improved Switch-Coupled Inductor Quasi-Z-Source Inverter - Google Patents
An Improved Switch-Coupled Inductor Quasi-Z-Source Inverter Download PDFInfo
- Publication number
- CN112072942B CN112072942B CN202011039876.9A CN202011039876A CN112072942B CN 112072942 B CN112072942 B CN 112072942B CN 202011039876 A CN202011039876 A CN 202011039876A CN 112072942 B CN112072942 B CN 112072942B
- Authority
- CN
- China
- Prior art keywords
- winding
- diode
- capacitor
- cathode
- anode
- 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.)
- Active
Links
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
- H02M7/53—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
- H02M7/53871—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 with automatic control of output voltage or current
-
- 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
- H02M7/539—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 with automatic control of output wave form or frequency
- H02M7/5395—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 with automatic control of output wave form or frequency by pulse-width modulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention belongs to the technical field of DC-AC conversion equipment, and relates to an improved switch coupling inductance quasi-Z source inverter, which comprises a direct current power supply, a first inductor, a first capacitor, a first diode, a second diode, a third diode, a second capacitor, a third capacitor, a first winding, a second winding, a third winding, a fourth winding and six power switching tubes, wherein the second diode, the third capacitor, the first winding, the second winding, the third winding and the fourth winding form a boosting unit, the first winding, the second winding, the third winding and the fourth winding are coupled in pairs and are coupled in the same direction, and the unique connection mode among the homonymous ends of the four coupling inductances can effectively reduce the current stress of the windings, reduce the loss, reduce the resonance problem of a converter circuit and have high output efficiency.
Description
Technical field:
The invention belongs to the technical field of DC-AC conversion equipment, and relates to an improved switch coupling inductance quasi-Z source inverter (MSCL qZSI).
The background technology is as follows:
The rapid development of renewable clean energy has become an important point for the development of energy in all countries of the world as the problems of energy crisis and environmental pollution have become more and more severe since the 21 st century. Renewable clean energy sources such as solar energy, wind energy, water energy and nuclear energy are widely applied, and a photovoltaic system based on solar energy is widely focused on all countries in the world due to the advantages of no pollution, no noise, rich development resources and the like, is determined as a new energy technology with the most development prospect in the future, and is widely applied to various fields of industrial production and national economy nowadays. The voltage source inverter is used as a converter which is most mature in application, and is widely applied to the fields of uninterruptible power supplies, speed regulation of alternating current motors, new energy power generation and the like. As a Power Conditioning System (PCS), an inverter plays a vital role in a solar power generation system. Traditional single-stage photovoltaic power generation systems use DC/AC inverters to directly transfer the energy output by the photovoltaic cells to the grid. Although the mode can obtain higher conversion efficiency, the mode has the defects that firstly, higher input voltage is needed, a plurality of photovoltaic modules are required to be connected in series, the system cost and the failure rate are greatly increased, the power loss is serious under non-ideal conditions, and secondly, in the actual working process, in order to track the maximum power point voltage of a photovoltaic cell, the voltage of a direct current bus of an inverter needs to be fluctuated in a larger range, and the power capacity of the inverter is additionally increased in the design process of the inverter. The above-described problems can be solved by a two-stage control structure of a cascaded DC-DC circuit on the basis of a single-stage power generation system. A DC/DC circuit with a maximum power point tracking function is added between the photovoltaic module and the inverter, the number of the photovoltaic modules connected in series can be reduced through the DC circuit to be boosted, constant direct current link voltage is obtained, independent control and maximum power point tracking of the photovoltaic cells are realized when the inverter is in grid-connected operation, but the DC/DC circuit has the defects that the efficiency of the whole system is reduced due to the addition of the DC/DC converter, the number of hardware circuits in the system is increased, the reliability of the system operation is reduced, and the maintenance cost is increased. In order to solve the problems of low gain and efficiency, the F.Z.Peng professor proposed a novel single-stage buck-boost Inverter in 2002, namely a Z-Source Inverter (ZSI), which can boost and lower the voltage of the single-stage Inverter, and has certain advantages when used in a photovoltaic power generation grid-connected system. The development of the capacity of the single-chip photovoltaic module promotes the rapid development of the micro-inverter grid-connected system, and the high-voltage gain ZSI is very suitable for the application scene, however, experimental researches show that the traditional ZSI also has the defects of being limited by a self topological structure, low in voltage gain, intermittent in input side current, high in voltage born by two ends of an energy storage capacitor, starting impulse current, common mode noise and the like. In order to solve the problems, a series of improvements are carried out on the traditional ZSI by vast scholars, wherein the most classical improved circuit is a quasi-Z-source inverter (qZSI) circuit, a quasi-Z-source inverter (qZSI) is used for a photovoltaic power generation grid-connected system, so that the Maximum Power Point Tracking (MPPT) of a photovoltaic module can be realized, and the grid connection of the inverter is convenient. The continuous input current of qZSI contributes to MPPT of the photovoltaic module, while the "low" voltage overshoot of the dc bus contributes to type selection of the switch and improvement of the electromagnetic Environment (EMI) of the inverter, but the lower dc link boost capability of qZSI requires a large number of photovoltaic modules to be connected in series to reach the grid-connected voltage level, which results in high cost and failure rate of the photovoltaic module system, embedding a specific boost unit in the qZSI frame results in new high voltage gain qZSI, such inverter can achieve the desired grid-connected voltage level by adjusting the turn ratio n and the through duty cycle D of the coupling inductance, it can maintain continuous input current and lower dc bus voltage overshoot, and increase the boost capability of the inverter, but the current stress of the components in the boost unit is higher, increasing difficulty and cost of component selection. Thus, emphasis is placed on embedding improved boost units in qZSI. Hafiz Furqan Ahmed, honnyong Cha et al propose SCL qZSI in which bootstrap capacitors and symmetrical parallel arrangements are used to increase boost capability at a smaller through duty cycle D, which can reduce current stress of the assembly, and in addition, the addition of the third winding N23 in the coupled inductor increases boost capability of the inverter, however copper losses in the windings in the non-through state reduce efficiency. SAEED SHARIFI AND Mohammad Monfared achieves high voltage gain at small D by using bootstrap capacitor and switch coupled inductor unit, however, during the pass-through and non-pass-through states, the third winding N23 of the switch coupled inductor has higher current stress, which leads to high copper loss of the coupled inductor, thereby reducing inverter efficiency. therefore, it has been a challenging task in photovoltaic power generation systems to find a winding with a simple structure, high conversion efficiency, low current stress, and an inverter circuit suitable for high boost applications.
The invention comprises the following steps:
the present invention is directed to overcoming the shortcomings of the prior art by designing an improved switch coupled inductor quasi-Z source inverter (MSCL qZSI) that provides continuous input current and low dc bus voltage spikes.
In order to achieve the above objective, the main structure of the improved switch coupling inductance quasi-Z source inverter of the present invention includes a dc power supply, a first inductance, a first capacitance, a first diode, a second diode, a third diode, a second capacitance, a third capacitance, a first winding, a second winding, a third winding, a fourth winding, and six power switching tubes, wherein the second diode, the third capacitance, the first winding, the second winding, the third winding, and the fourth winding form a boost unit; the two ends of the first inductor are respectively connected with the anode of the direct current power supply, the anode of the first diode and the cathode of the second capacitor, the cathode of the first diode is respectively connected with the anode of the first capacitor, the homonymous end of the first winding and the anode of the third diode, the cathode of the third diode is respectively connected with the heteronymous end of the fourth winding, the heteronymous end of the first winding is respectively connected with the heteronymous end of the third winding and the cathode of the third capacitor, the homonymous end of the third winding is respectively connected with the anode of the second winding and the homonymous end of the fourth winding, the cathode of the second diode is respectively connected with the anode of the second capacitor and the heteronymous end of the second winding, the drain electrode of the upper bridge wall power switch tube is respectively connected with the anode of the second capacitor, the cathode of the second diode and the heteronymous end of the second winding, the source electrode of the lower bridge arm power switch tube is respectively connected with the cathode of the direct current power supply and the cathode of the first capacitor, the homonymous end of the first winding, the homonymous end of the second winding and the fourth winding are correspondingly coupled with the homonymous ends of the second winding and the fourth winding, and the homonymous ratio of the first winding and the fourth winding is 23/N21＝N24/N22, and n=equal to N < 0.
The invention controls the switching on or off of the power switch tube to switch the working state of the circuit, thereby controlling whether the direct current power supply provides the energy required by the circuit work for the coupling inductance, and realizing the change of the gain of the input voltage and the output voltage by changing the duty ratio and the winding turns ratio of the coupling inductance, so as to realize the control of the output voltage to the rising and falling of the direct current power supply.
Compared with the prior art, in actual work, the invention realizes the continuous charging and discharging processes of the coupling inductance unit due to the on and off of the switching tube, thereby achieving the purpose of high boost gain, and the unique connection mode between the same-name ends of the four coupling inductances can effectively reduce the current stress of the winding, reduce the loss, reduce the resonance problem of the converter circuit and have high output efficiency.
Description of the drawings:
Fig. 1 is a schematic diagram of a main structure circuit of the present invention.
Fig. 2 is a schematic diagram of the working state of the circuit when the power switch tube S 1-S6 (S eq in the drawing) is turned on.
Fig. 3 is a schematic diagram of a circuit operating state when the power switch tube S 1-S6 is turned off.
Fig. 4 is a graph showing the relationship between the boost factor B and the through duty ratio D of three inverters according to an embodiment of the present invention.
Fig. 5 is a graph of winding current versus voltage gain G for three inverters according to an embodiment of the present invention.
Fig. 6 is a graph showing the efficiency of three inverters as a function of output power according to an embodiment of the present invention.
The specific embodiment is as follows:
the invention will be further described with reference to the drawings and the detailed description.
Examples:
The main structure of MSCL qZSI in this embodiment is shown in fig. 1, in which a boost unit including a coupling winding is used to replace a single independent energy storage inductor in a traditional boost topology, and the characteristic that the coupling inductor charges and discharges simultaneously is utilized, and on the basis that the original inverter only has an adjustment factor of duty ratio D, the adjustable free factor of turns ratio is increased, and the capability of high voltage conversion is realized by changing the turns ratio of the coupling winding, which specifically includes a dc power supply V g, a first inductor L 1, A first capacitor C 1, a first diode D 1, a second diode D 21, a third diode D 22, A second capacitor C 2, a third capacitor C 21, a first winding N 21, a second winding N 22, a third winding N 23, A fourth winding N 24 and six power switching tubes S 1-S6, wherein a second diode D 21, a third diode D 22, A third capacitor C 21, a first winding N 21, a second winding N 22, The third winding N 23 and the fourth winding N 24 form a boosting unit, and two ends of the first inductor L 1 are respectively connected with the positive electrode of the direct current power supply V g, The anode of the first diode D 1 is connected with the cathode of the second capacitor C 2, and the cathode of the first diode D 1 is respectively connected with the anode of the first capacitor C 1, The same name end of the first winding N 21 is connected with the anode of the third diode D 22, the cathode of the third diode D 22 is connected with the different name end of the fourth winding N 24, the different name end of the first winding N 21 is respectively connected with the different name end of the third winding N 23 and the cathode of the third capacitor C 21, the same name end of the third winding N 23 is connected with the anode of the second diode D 21, the anode of the third capacitor C 21 is respectively connected with the same name end of the second winding N 22 and the same name end of the fourth winding N 24, the cathode of the second diode D 21 is respectively connected with the anode of the second capacitor C 2 and the different name end of the second winding N 22, and the drain electrode of the upper bridge wall power switch tube S 1-S3 is respectively connected with the anode of the second capacitor C 2, The cathode of the second diode D 21 is connected with the synonym end of the second winding N 22, the source electrode of the lower bridge arm power switch tube S 4-S6 is respectively connected with the cathode of the direct current power supply V g and the cathode of the first capacitor C 1, the first winding N 21, the second winding N 22, the third winding N 23 and the fourth winding N 24 are coupled in pairs, and the corresponding turns ratio is N 23/N21＝N24/N22 =n, and are all coupled in the same direction.
In the embodiment, the unipolar SPWM mode is adopted to control the on or off of the power switch tube, so that the switching of different working modes is completed, the switching loss is reduced in the whole circuit structure, the whole working efficiency of the circuit is improved, and the different working states of the circuit when the switch tube is turned off and turned on are respectively shown in fig. 2 and 3:
In the pass state, the first diode D 1 is reverse biased, the second diode D 21 and the third diode D 22 are on, the first inductor L 1 is charged by the second capacitor C 2 and the input power V g, the four windings N 21、N22、N23 and N 24 are all charged by the first capacitor C 1, the third capacitor C 21 stores energy from the first capacitor C 1, and a specific current loop is shown in fig. 2. At this time, the circuit has the following voltage and current relation:
In the non-pass state, the second diode D 21 and the third diode D 22 are reverse biased, the first diode D 1 is turned on, the energy stored in the first winding N 21, the second winding N 22 and the first inductor L 1 is combined with the dc power source V g to supply power to the load, the first capacitor C 1 and the second capacitor C 2 are charged in this state, the specific current loop is as shown in fig. 3, and at this time, the following voltage and current relationship exists in the circuit structure:
where V L1-ON,VN-ON,VL1-OFF,VN-OFF is the voltage across the magnetic element (inductor and winding) in the pass-through and non-pass-through states, respectively, V C is the capacitor voltage, V PN is the peak dc link voltage,
Applying the theory of volt-second equilibrium to L 1 and N 21 gives:
Applying the ampere-second equilibrium theory to C 2 gives:
the current relationship in the non-pass-through state can be obtained:
wherein V is N23＝VN24＝-nVN21＝-nVN22
VL1-ON＝(1-D)VPN
Thereby obtaining a peak direct current link boost factor B of MSCL qZSI:
wherein B is the peak dc link boost factor of the inverter, D is the through duty cycle (0 < D < 1), n=n 23/N21＝N24/N22 is the turns ratio, 0< N <1, N 21＝N22, the peak dc link boost factors of SCL qZSI and mSSCL qZSI in the prior art are as follows:
The three inverters described above have the same type of boost factor, i.e. b=k N/1-kD,k＞1,kN >1 is a factor associated with the structure of the inverter, although the proposed inverter has four windings, in order to make the comparison more valuable, the comparison is made in this embodiment based on the same total turns ratio of the coupling inductances in the different inverters, so the total turns ratio N 23/N21+N24/N22 =0.15+0.15=0.3 in MSCL qZSI is equal to the turns ratio n=n 23/N21 =0.3 in SCL qZSI and mSSCL qZSI, the boost factor of MSCL qZSI being between that of mSSCL qZSI and SCL qZSI in the diagram of boost factor B versus through duty cycle D (as shown in fig. 4);
the relationship between D and M is d=1-M using a simple boost control method
In the graph of winding current versus voltage gain G (as shown in fig. 5), the lumens of windings N 23 and N 24 of MSCL qZSI are significantly lower than mSSCL qZSI and SCL qZSI, the currents mSSCL qZSI and SCL qZSI of windings N 21 and N 22 are almost as low, the efficiency versus output power of the three inverters is shown in fig. 6, MSCL qZSI has higher efficiency than the other two inverters due to the lower current stress on windings N23 and N24, and although mSSCL qZSI has a very high boost capability, the efficiency is the lowest in the three inverters due to the high current stress in windings N23 and N24, and the power consumption of the coupling inductance in MSCL qZSI is much lower than the other two candidates.
In the embodiment, MSCL qZSI is tested under the test conditions of 100V input voltage, 120V output phase voltage effective value and 1kW output power, and the maximum efficiency reaches 92.8%, so that the design requirement is basically met. The analysis and experimental results show that MSCL qZSI of the present embodiment has the advantages of high voltage gain and high efficiency, provides continuous input current and low dc bus voltage peak, can realize Maximum Power Point Tracking (MPPT) of the photovoltaic module, and reduces power loss of windings and improves efficiency of the proposed inverter due to unique design of coupling inductor, and winding current stress in the proposed MSCL qZSI is lower than SCL qZSI and mSSCL qZSI.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039876.9A CN112072942B (en) | 2020-09-28 | 2020-09-28 | An Improved Switch-Coupled Inductor Quasi-Z-Source Inverter |
| PCT/CN2021/080447 WO2022062327A1 (en) | 2020-09-28 | 2021-03-12 | Improved switched-coupled-inductor quasi-z-source inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011039876.9A CN112072942B (en) | 2020-09-28 | 2020-09-28 | An Improved Switch-Coupled Inductor Quasi-Z-Source Inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112072942A CN112072942A (en) | 2020-12-11 |
| CN112072942B true CN112072942B (en) | 2024-12-27 |
Family
ID=73683684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011039876.9A Active CN112072942B (en) | 2020-09-28 | 2020-09-28 | An Improved Switch-Coupled Inductor Quasi-Z-Source Inverter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112072942B (en) |
| WO (1) | WO2022062327A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072942B (en) * | 2020-09-28 | 2024-12-27 | 青岛理工大学 | An Improved Switch-Coupled Inductor Quasi-Z-Source Inverter |
| CN113676073A (en) * | 2021-08-13 | 2021-11-19 | 青岛理工大学 | Novel double-bootstrap coupling inductor quasi-Z-source inverter and control method |
| CN113922690B (en) * | 2021-08-16 | 2023-11-07 | 青岛理工大学 | An improved three-coupled inductor quasi-Z source boost inverter and control method |
| CN114784996A (en) * | 2022-04-28 | 2022-07-22 | 中国科学院电工研究所 | Low-voltage high-current wireless charging system and cooperative control method thereof |
| CN114583990B (en) * | 2022-05-07 | 2022-08-16 | 深圳古瑞瓦特新能源有限公司 | High-gain single-phase inverter, control method and three-phase inverter |
| CN114759792B (en) * | 2022-05-11 | 2024-07-02 | 南京航空航天大学 | A single-stage high-gain modular multi-level resonant DC boost converter |
| CN115800734B (en) * | 2023-02-08 | 2023-05-02 | 浙江日风电气股份有限公司 | A single-stage two-stage boost inverter, boost method, device, equipment and medium |
| CN117458864A (en) * | 2023-11-01 | 2024-01-26 | 深圳市百川创新技术有限公司 | A four-switch buck-boost topology drive circuit and method |
| CN118017861B (en) * | 2024-04-09 | 2024-07-02 | 湖南大学 | A coupled inductor buck-boost inverter with low common mode voltage and wide voltage regulation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212367153U (en) * | 2020-09-28 | 2021-01-15 | 青岛理工大学 | An Improved Switch-Coupled Inductor Quasi-Z Source Inverter |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130234525A1 (en) * | 2012-03-06 | 2013-09-12 | Ferrotec (Usa) Corporation | Electrical breakdown limiter for a high voltage power supply |
| CN103457496A (en) * | 2013-08-15 | 2013-12-18 | 南京航空航天大学 | Single-stage booster inverter |
| CN104734547B (en) * | 2015-03-19 | 2017-08-04 | 南京航空航天大学 | A boost unit Z-source inverter |
| CN105119487A (en) * | 2015-09-23 | 2015-12-02 | 青岛理工大学 | Coupling inductance boost conversion device with switch inductance |
| CN105406751A (en) * | 2015-12-30 | 2016-03-16 | 哈尔滨工业大学 | Three-winding coupling inductance type Z-source inverter circuit with high step-up ratio ability |
| CN107681908A (en) * | 2017-10-09 | 2018-02-09 | 哈尔滨工业大学 | Coupled-inductance quasi-Z-source inverter based on voltage-doubling capacitors and its modulation method |
| CN208424201U (en) * | 2018-07-27 | 2019-01-22 | 国网辽宁省电力有限公司铁岭供电公司 | A kind of BOOST converter with switched inductors structure |
| CN112072942B (en) * | 2020-09-28 | 2024-12-27 | 青岛理工大学 | An Improved Switch-Coupled Inductor Quasi-Z-Source Inverter |
-
2020
- 2020-09-28 CN CN202011039876.9A patent/CN112072942B/en active Active
-
2021
- 2021-03-12 WO PCT/CN2021/080447 patent/WO2022062327A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212367153U (en) * | 2020-09-28 | 2021-01-15 | 青岛理工大学 | An Improved Switch-Coupled Inductor Quasi-Z Source Inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022062327A1 (en) | 2022-03-31 |
| CN112072942A (en) | 2020-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112072942B (en) | An Improved Switch-Coupled Inductor Quasi-Z-Source Inverter | |
| CN102324841B (en) | Multi-input high-gain boost converter | |
| Oluwafemi et al. | A modified high output-gain cuk converter circuit configuration for renewable applications—A comprehensive investigation | |
| CN113037120B (en) | Single-phase inverter and control method capable of suppressing secondary ripple and increasing power density | |
| CN211183828U (en) | An Improved CMVR-II Boostable Inverter | |
| CN105939107B (en) | Mixed quasi-switch boosting DC-DC converter | |
| Zhao | High efficiency single-stage grid-tied PV inverter for renewable energy system | |
| Lodh et al. | Single stage multi-port Flyback type solar PV module integrated micro-inverter with battery backup | |
| Modaberi et al. | A quadratic high step-up DC-DC boost converter based on coupled inductor with single switch and continuous input current | |
| Lee et al. | Quadratic boost converter with switched capacitor and coupled inductor for PV system applications | |
| CN210724563U (en) | A Novel Boost DC-DC Converter Topology with TΓ | |
| CN209659178U (en) | A Novel Voltage Doubler-Z Source Inverter | |
| Sarikhani et al. | A common-ground Quazi-Z-source single-phase inverter suitable for photovoltaic applications | |
| CN214798894U (en) | Intelligent energy-using photovoltaic grid-connected system | |
| CN207460024U (en) | A kind of four switch AC side power decoupling circuits | |
| CN212367153U (en) | An Improved Switch-Coupled Inductor Quasi-Z Source Inverter | |
| CN113708408A (en) | Multi-output mode single-phase photovoltaic inverter adaptive to illumination conditions and control method | |
| CN205847091U (en) | A Switched Inductance Quasi-Switch Boost DC-DC Converter | |
| CN113014089A (en) | Halving boosting type high-boost ratio DC/DC converter | |
| CN215498733U (en) | Improved triple voltage circuit and switch capacitor coupling inductance DC-DC converter | |
| CN111934578B (en) | A dual-mode photovoltaic inverter circuit system based on hybrid control | |
| CN212367152U (en) | A unipolar boostable inverter with integrated switched capacitor circuit | |
| Antony et al. | A Study on a Compact Single Input Dual Output Non-isolated DC-DC Converter With Low Switching Stresses | |
| CN104578882B (en) | Voltage type Tran-z-source miniature inverter | |
| CN112054708B (en) | Monopole boost inverter integrated with switched capacitor circuit |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |