CN201435690Y - Three-phase inverter with four bridge legs for photovoltaic interconnected generation and photovoltaic interconnected generation system - Google Patents

Three-phase inverter with four bridge legs for photovoltaic interconnected generation and photovoltaic interconnected generation system Download PDF

Info

Publication number
CN201435690Y
CN201435690Y CN2009201489965U CN200920148996U CN201435690Y CN 201435690 Y CN201435690 Y CN 201435690Y CN 2009201489965 U CN2009201489965 U CN 2009201489965U CN 200920148996 U CN200920148996 U CN 200920148996U CN 201435690 Y CN201435690 Y CN 201435690Y
Authority
CN
China
Prior art keywords
phase
brachium pontis
neutral
output
inverter
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.)
Expired - Fee Related
Application number
CN2009201489965U
Other languages
Chinese (zh)
Inventor
阮少华
刘伟增
周洪伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XINJIANG NEW ENERGY-SOURCE Co Ltd
Original Assignee
XINJIANG NEW ENERGY-SOURCE Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by XINJIANG NEW ENERGY-SOURCE Co Ltd filed Critical XINJIANG NEW ENERGY-SOURCE Co Ltd
Priority to CN2009201489965U priority Critical patent/CN201435690Y/en
Application granted granted Critical
Publication of CN201435690Y publication Critical patent/CN201435690Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H02M1/123—Suppression of common mode 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
    • H02M7/5387—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
    • 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

  • Inverter Devices (AREA)

Abstract

The utility model relates to a three-phase inverter with four bridge legs for photovoltaic interconnected generation, comprising an input terminal connected with a photovoltaic array, an output terminal connected with a three-phase electrical network, and three parallel-connected bridge legs (a, b, c). Each bridge leg comprises two series switching tubes (S1, S4/S3, S6/S5, S2), and the connectionpoint of each two series switching tubes forms the output terminals of the bridge legs. The three-phase inverter with the four bridge legs for photovoltaic interconnected generation also comprises a neutral bridge leg (n) connected with both ends of the three bridge legs in parallel, the neutral bridge leg comprises two series switching tubes (S7, S8), the connection point of the switching tubes (S7, S8) forms an output terminal of the neutral bridge leg, and the output terminal of the neutral bridge leg is connected with a neutral conductor of the three-phase electrical network. A photovoltaic interconnected generation system containing the inverter well adapts to the conditions of network unbalance, and has an extremely small content of interconnected current harmonic wave.

Description

The three-phase four-leg inverter and the grid-connected photovoltaic system that are used for parallel network power generation
Technical field
The utility model belongs to the solar energy generation technology field, is specifically related to a kind of three-phase four-leg inverter and comprises the grid-connected photovoltaic system of this inverter.
Background technology
Because the open only way that is only the serious day by day energy of reply and environmental problem, realization sustainable development that utilizes that the factor such as increasingly serious of energy crisis, environmental pollution comes to realise more and more countries accelerates regenerative resource.Solar energy becomes green energy resource most active in the regenerative resource because of its cleaning, efficiently and never depleted characteristics.Solar grid-connected generation technology by the direct feed-in electrical network of parallel network reverse device, because of it has the energy storage of need not, unique advantage such as simple in structure, makes it become the focus of countries in the world expert research very soon solar energy.Solar grid-connected operational mode also becomes a kind of main mode of photovoltaic application rapidly.
Photovoltaic combining inverter is the bridge that solar power generation is connected with electrical network, is the core of grid-connected photovoltaic system.In the high-power power station of being incorporated into the power networks, all adopt the three-phase grid way of output, and the quality of three-phase grid-connected inverter performance be the whole power station of decision can stability and safety the key of operation.General structure or three the composite type three-phase inversion structures that single-phase full bridge constitutes that adopt three brachium pontis of three-phase photovoltaic grid-connected inverting device, the former topological structure are not owing to there is center line, so be applicable to the situation of three-phase grid balance.But in the relatively poor area of power grid quality, three phase network voltage is often unbalanced, and wave distortion is bigger, and at this moment, the grid-connected current harmonic content will appear in three-phase grid-connected inverter to be increased, and system effectiveness reduces, fluctuation of service, even problem such as cisco unity malfunction.Though latter's topological structure can be to the normal transmission of electric energy of three-phase imbalance electrical network, its complex circuit, bulky, cost is higher.
The utility model content
Problem to be solved in the utility model is at existing photovoltaic DC-to-AC converter above shortcomings, a kind of high efficiency, high reliability is provided, unbalanced power supply is had very strong adaptive capacity and makes the minimum three-phase four-leg inverter of grid-connected current harmonic content and comprise the grid-connected photovoltaic system of this inverter.
Solving the problems of the technologies described above the technical scheme that is adopted is this three-phase four-leg inverter, and its input links to each other with photovoltaic array, and output links to each other with three phase network, comprises the brachium pontis (a, b, c) of three parallel connections, and each brachium pontis comprises two switching tube (S of series connection 1, S 4/ S 3, S 6/ S 5, S 2), the tie point of two switching tubes that are cascaded is the output of each brachium pontis, and this inverter also includes the neutral brachium pontis n in parallel with the two ends of described three brachium pontis, and described neutral brachium pontis comprises two switching tube (S of series connection 7, S 8), described two switching tube (S 7, S 8) tie point constitute the output of neutral brachium pontis, the output of neutral brachium pontis links to each other with the neutral line of three phase network.
Preferably, this three-phase four-leg inverter also includes storage capacitor C, and described storage capacitor C is parallel to the input of three brachium pontis, is used for energy storage, keeps stablizing and filtering of direct voltage.Between photovoltaic array and storage capacitor C, also can be serially connected with anti-recoil diode D.
Further preferably, this three-phase four-leg inverter also includes three filter inductance (L a, L b, L c) and neutral line filter inductance L n, described three filter inductance (L a, L b, L c) be connected between the input of the output of three brachium pontis (a, b, c) and three phase network described neutral line filter inductance L respectively nBe connected between the neutral line of the output of neutral brachium pontis n and three phase network.
Wherein, neutral line filter inductance L nCan improve the whole filter effect of whole three-phase four-leg inverter, suppress current in middle wire switch ripple, reduce total harmonic distortion (THD) value of three-phase output voltage.Neutral brachium pontis (also can be called public brachium pontis) can directly be controlled neutral point voltage, thereby obtain 3 independent voltages, has intrinsic uneven disposal ability, neutral brachium pontis provides path for unsymmetrical current and zero-sequence current, gives full play to regulate three-phase and export unbalanced effect under the unbalanced power supply condition.
Neutral brachium pontis n and neutral line filter inductance L nThe Principles of Regulation of regulating are as follows:
Circuit equation among Fig. 1 is respectively formula (1), (2), is expressed as:
U a U b U c = L d dt i a i b i c + e a e b e c + L n d dt i n i n i n - - - ( 1 )
i a+i b+i c＝i n (2)
Formula (1) is the voltage circuit equation, and formula (2) is the inductive current loop equation.
Wherein: U a, U b, U cBe the output voltage of three-phase four-leg inverter, i a, i b, i cBe three-phase output current, e a, e b, e cBe three phase network voltage, i nBe neutral line inductive current, L is the three-phase filter inductance; L nBe neutral line filter inductance;
If three phase network imbalance, then [e ae be c] ' contain positive sequence, negative phase-sequence and zero-sequence component, suc as formula (3),
Figure G2009201489965D00031
E wherein m p, E m n, E m 0It is the amplitude of positive sequence, negative phase-sequence, zero-sequence component; α p, α n, α 0It is the phase value of positive sequence, negative phase-sequence, zero-sequence component.
Three brachium pontis a, b, c control three-phase output voltage positive sequence component [U ApU BpU Cp] ' and negative sequence component [U AnU BnU CnPositive sequence and the negative sequence component of] ', to follow unbalanced electric grid voltage.Zero-sequence component [the U of neutral brachium pontis n control three-phase output voltage A0U B0U C0] ', is to follow the zero-sequence component of unbalanced electric grid voltage.Wherein, [U ApU BpU Cp] ' be three brachium pontis a, b, c are respectively and the positive sequence voltage between the neutral brachium pontis n; [U AnU BnU Cn] ' be three brachium pontis a, b, c are respectively and the negative sequence voltage between the neutral brachium pontis n; [U A0U B0U C0] ' be three brachium pontis a, b, c are respectively and the residual voltage between the neutral brachium pontis n.
Be formula (4),
U a U b U c = U ap U bp U cp + U an U bn U cn + U a 0 U b 0 U c 0 - - - ( 4 )
It is as follows to utilize the utility model three-phase four-leg inverter to carry out the process of photovoltaic generation: the solar-energy photo-voltaic cell array is converted into electric energy with solar energy, by anti-recoil diode D with power storage in storage capacitor C, storage capacitor C discharge releases energy by output AC electric energy after the inversion of the utility model three-phase four-leg inverter, is connected to the grid through filter inductance again.
A kind of grid-connected photovoltaic system comprises photovoltaic combining inverter, and described photovoltaic combining inverter adopts the above-mentioned three-phase four-leg inverter of the utility model.
This grid-connected photovoltaic system also comprises controller, the direct current sampling and the modulate circuit that are used for measuring light photovoltaic array output voltage and electric current, be used to measure the alternating current sampling and the modulate circuit of three-phase four-leg inverter output current, the zero cross detection circuit that three phase network frequency and phase place are detected, be used to measure the alternating voltage sampling and the modulate circuit of three phase network voltage, and the drive circuit of three-phase four-leg inverter, described direct current sampling and modulate circuit, alternating current sampling and modulate circuit, zero cross detection circuit, alternating voltage sampling and modulate circuit link to each other with the input of described controller respectively, and the output of controller links to each other with three-phase four-leg inverter by drive circuit.
The utility model grid-connected photovoltaic system is simple in structure, has only an energy conversion link, has improved efficient and system reliability, helps debugging and maintenance more; If line voltage three-phase imbalance, each of grid-connected current all can be followed the tracks of the variation of frequency, phase place and the amplitude of line voltage mutually fast, the situation of unbalanced power supply there is very strong adaptability, and harmonic wave is also had certain inhibitory action.
The utility model grid-connected photovoltaic system as energy-storage system, to its power supply, has improved electrical network the energy source structure of electrical network, and because it includes three-phase four-leg inverter, unbalanced power supply has been had excellent adaptability, the reliability height.Simultaneously, owing to make full use of this clean energy resource of solar energy, can reduce environmental pollution.
Description of drawings
Fig. 1 is the circuit structure diagram of the utility model three-phase four-leg inverter
Fig. 2 is the structural representation of the utility model grid-connected photovoltaic system
Among the figure: the anti-recoil diode S of C-storage capacitor D- 1-S 8-switching tube L a, L b, L c-filter inductance L n-neutral line filter inductance a, b, the neutral brachium pontis e of c-brachium pontis n- a, e b, e cSampling of-three phase network voltage o-neutral point M-inverter main circuit 1-direct current and the sampling of modulate circuit 2-alternating current and sampling of modulate circuit 3-alternating voltage and modulate circuit 4-zero cross detection circuit 5-drive circuit 6-three-phase four-leg inverter 7-controller
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail.
Following examples are indefiniteness embodiment of the present utility model.
Fig. 1 is the circuit structure diagram of the utility model three-phase four-leg inverter.This three-phase four-leg inverter increases a neutral brachium pontis (public brachium pontis) and forms on the basis of traditional three-phase three leg inverters.As shown in Figure 1, the utility model three-phase four-leg inverter comprises anti-recoil diode D, storage capacitor C, inverter main circuit M, three filter inductance L a, L b, L c, neutral line filter inductance L n
As shown in Figure 1, inverter main circuit M is by eight switching tube S 1-S 8Form, each switching tube is made of an IGBT and a diode inverse parallel, and the IGBT module that adopts four group of 2 unit package to form constitutes inverter main circuit M, and wherein the IGBT module can adopt the commercially available CM150DX-24A of Mitsubishi, the FF100R12YT3 of Infineon, match rice control SKM100GB12T4 etc.
Three brachium pontis a, b, c's is composed as follows among the inverter main circuit M: switching tube S 1, S 4Be composed in series A phase brachium pontis a, switching tube S 3, S 6Be composed in series B phase brachium pontis b, switching tube S 5, S 2Be composed in series C phase brachium pontis c.Switching tube S 7, S 8Be composed in series neutral brachium pontis n, neutral brachium pontis is also referred to as public brachium pontis.In each brachium pontis, the tie point of two switching tubes of series connection is the output of brachium pontis.A phase brachium pontis a, B phase brachium pontis b, C phase brachium pontis c form A full-bridge inverter, B phase full-bridge inverter, C phase full-bridge inverter mutually with neutral brachium pontis n respectively.The output of three brachium pontis a, b, c is connected with filter inductance L respectively a, L b, L c, A phase brachium pontis a, B phase brachium pontis b, C phase brachium pontis c are by filter inductance L a, L b, L cBe connected with A, B, the C three of three phase network respectively, public brachium pontis n is by neutral line filter inductance L nBe connected with the neutral point o of three phase network.
In inverter main circuit M, the end points up and down of three brachium pontis a, b, c and neutral brachium pontis n is connected to together, forms the dc bus of three-phase four-leg inverter, and the upper end bus is a positive electrode bus, and the lower end bus is the negative pole bus.Storage capacitor C is arranged between photovoltaic array and the inverter main circuit M, and the positive pole of storage capacitor C is connected with positive electrode bus, and its negative pole is connected with the negative pole bus.For preventing electrical network to the photovoltaic array reverse charge, between photovoltaic array and storage capacitor C, also be provided with anti-recoil diode D, its positive pole is connected with photovoltaic array, and negative pole is connected with the positive pole of storage capacitor C.
The course of work of the utility model three-phase four-leg inverter is as follows: the solar energy photovoltaic array is converted into electric energy with solar energy, through anti-recoil diode D with power storage in storage capacitor C, the energy that storage capacitor C discharge discharges through inverter main circuit M inversion output AC electric energy after filter inductance L a, L b, L cIncorporate three phase network into.
In the present embodiment, neutral line filter inductance L nCan improve whole filter effect, suppress current in middle wire switch ripple, reduce total harmonic distortion (THD) value of three-phase output voltage.Public brachium pontis n can directly control neutral point voltage, thereby obtain 3 independent voltages, have intrinsic uneven disposal ability, public brachium pontis n provides path for unsymmetrical current and zero-sequence current, gives full play to regulate three-phase export unbalanced effect under the unbalanced power supply condition.
Fig. 2 is the structural representation of the utility model grid-connected photovoltaic system.As shown in Figure 2, in the present embodiment, grid-connected photovoltaic system comprises three-phase four-leg inverter 6, controller 7, direct current sampling and modulate circuit 1, alternating current sampling and modulate circuit 2, zero cross detection circuit 4, alternating voltage sampling and modulate circuit 3, drive circuit 5.Wherein, controller 7 adopts high speed digital signal processor DSP TMS320F2812.
Photovoltaic array links to each other with the input of three-phase four-leg inverter 6 by storage capacitor C, and the output of three-phase four-leg inverter 6 is by filter inductance L a, L b, L cWith neutral line filter inductance L nBe connected with A, B, C three-phase and the neutral point of three phase network respectively.Direct current sampling and modulate circuit 1 are located at the output of photovoltaic array, in order to the voltage and current signal of measuring light photovoltaic array output, and send the signal of telecommunication that is obtained to controller 7 and handle, and the photovoltaic array maximal power tracing are controlled realizing.Alternating current sampling and modulate circuit 2 are arranged on the output of three-phase four-leg inverter 6, in order to measure the three-phase current and the neutral line filter inductance electric current of three-phase four-leg inverter 6 outputs, and send the signal of telecommunication that is obtained to controller 7 and handle, so that the output waveform of three-phase four-leg inverter 6 is controlled.Alternating voltage sampling and modulate circuit 3 and zero cross detection circuit 4 are arranged on filter inductance L a, L b, L cAnd neutral line filter inductance L nAnd between the three phase network, alternating voltage sampling and modulate circuit 3 be in order to measuring three phase network voltage, and send the signal that records to controller 7 and handle, to realize the control to input electrical network waveform.The frequency and the phase place of 4 pairs of three phase networks of zero cross detection circuit detect, and send detection signal to controller 7 and handle, to realize the phase-locked function that is incorporated into the power networks.Controller 7 produces the signal of direct current sampling and modulate circuit 1, alternating current sampling and modulate circuit 2, alternating voltage sampling and modulate circuit 3 and zero cross detection circuit 4 collections control signal and sends this control signal to drive circuit 5 after calculation process, by the inverter main circuit M that drive circuit 5 drives in the three-phase four-leg inverter 6, make each can both independently follow the tracks of the variation of frequency, phase place and the amplitude of line voltage fast mutually.
Controller 7 realizes that the mode that the photovoltaic array maximal power tracing is regulated is: (1) is when increasing the power output (promptly strengthening grid-connected current) of the utility model inverter, the voltage of storage capacitor C remains unchanged under the transient state, the output voltage of solar panel is temporarily constant, the output voltage of photovoltaic array is consistent with the voltage of storage capacitor C, and the power output of solar panel is also temporarily constant.The power output of inverter is greater than input power at this moment, and storage capacitor C discharges, and the output voltage of solar panel reduces, and the power output of solar panel changes.With this moment solar panel power output with regulate before power output compare, if power output increases, show that then power output increases along with reducing of output voltage, the working point is positioned at the right of maximum power point, regulate in the right directionly, can continue to increase grid-connected current.Little before if the power output of solar panel is regulated, show that then power output reduces along with reducing of output voltage, the working point is positioned at the left side of maximum power point, regulate anisotropy, this moment, the power output of solar panel was preceding littler than regulating, and the power output of inverter is preceding bigger than regulating, and this is that storage capacitor C discharge causes, therefore need reduce grid-connected current.(2) when the power output that reduces inverter (promptly reducing grid-connected current), the voltage of storage capacitor C is constant under the transient state, and the output voltage of solar panel is temporarily constant, and the power output of solar panel is also temporarily constant.This moment, the inverter power output was less than the inverter input power, storage capacitor C charging, the output voltage of cell panel increases, power output and the preceding power output comparison of adjusting with cell panel this moment, if increase, show that then the cell panel power output increases along with the increase of output voltage, the working point is positioned at the left side of maximum power point, regulate in the right direction, continue to reduce grid-connected current, the power output of inverter is preceding littler than regulating at this moment, and the power output of solar panel is preceding bigger than regulating, and this causes because of the electric capacity charging.If the power output before the power output of solar panel is regulated is little, show that then power output reduces along with the increase of output voltage, the working point is positioned at the right of maximum power point, regulates anisotropy, needs to increase grid-connected current.So endless adjusting can make solar panel output at maximum power point.

Claims (7)

1. three-phase four-leg inverter that is used for parallel network power generation, its input links to each other with photovoltaic array, and output links to each other with three phase network, comprises the brachium pontis (a, b, c) of three parallel connections, and each brachium pontis comprises two switching tube (S of series connection 1, S 4/ S 3, S 6/ S 5, S 2), the tie point of two switching tubes that are cascaded is characterized in that for the output of each brachium pontis this inverter also includes the neutral brachium pontis (n) in parallel with the two ends of described three brachium pontis (a, b, c), described neutral brachium pontis comprises two switching tube (S of series connection 7, S 8), described two switching tube (S 7, S 8) tie point constitute the output of neutral brachium pontis, the output of neutral brachium pontis links to each other with the neutral line of three phase network.
2. three-phase four-leg inverter according to claim 1 is characterized in that this three-phase four-leg inverter also includes three filter inductance (L a, L b, L c) and neutral line filter inductance (L n), described three filter inductance (L a, L b, L c) be connected between the input of the output of three brachium pontis (a, b, c) and three phase network described neutral line filter inductance (L respectively n) be connected between the neutral line of the output of neutral brachium pontis (n) and three phase network.
3. three-phase four-leg inverter according to claim 1 is characterized in that this three-phase four-leg inverter also includes storage capacitor (C), and described storage capacitor (C) is parallel to the input of three brachium pontis (a, b, c).
4. three-phase four-leg inverter according to claim 3 is characterized in that also being in series with anti-recoil diode (D) between photovoltaic array and storage capacitor (C).
5. a grid-connected photovoltaic system comprises photovoltaic combining inverter, it is characterized in that described photovoltaic combining inverter adopts one of claim 1-4 described three-phase four-leg inverter.
6. grid-connected photovoltaic system according to claim 5, it is characterized in that this grid-connected photovoltaic system also includes controller (7), the direct current sampling and the modulate circuit (1) that are used for measuring light photovoltaic array output voltage and electric current, be used to measure the alternating current sampling and the modulate circuit (2) of three-phase four-leg inverter output current, the zero cross detection circuit (4) that three phase network frequency and phase place are detected, be used to measure the alternating voltage sampling and the modulate circuit (3) of three phase network voltage, and the drive circuit of three-phase four-leg inverter (5), described direct current sampling and modulate circuit (1), alternating current sampling and modulate circuit (2), zero cross detection circuit (4), alternating voltage sampling and modulate circuit (3) link to each other with the input of described controller (7) respectively, and the output of controller links to each other with three-phase four-leg inverter (6) by drive circuit (5).
7. grid-connected photovoltaic system according to claim 6 is characterized in that described controller (7) adopts DSP TMS320F2812.
CN2009201489965U 2009-04-28 2009-04-28 Three-phase inverter with four bridge legs for photovoltaic interconnected generation and photovoltaic interconnected generation system Expired - Fee Related CN201435690Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009201489965U CN201435690Y (en) 2009-04-28 2009-04-28 Three-phase inverter with four bridge legs for photovoltaic interconnected generation and photovoltaic interconnected generation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009201489965U CN201435690Y (en) 2009-04-28 2009-04-28 Three-phase inverter with four bridge legs for photovoltaic interconnected generation and photovoltaic interconnected generation system

Publications (1)

Publication Number Publication Date
CN201435690Y true CN201435690Y (en) 2010-03-31

Family

ID=42054504

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009201489965U Expired - Fee Related CN201435690Y (en) 2009-04-28 2009-04-28 Three-phase inverter with four bridge legs for photovoltaic interconnected generation and photovoltaic interconnected generation system

Country Status (1)

Country Link
CN (1) CN201435690Y (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101877548A (en) * 2009-04-28 2010-11-03 新疆新能源股份有限公司 Three-phase four-leg inverter used for photovoltaic grid-connected power generation and photovoltaic grid-connected power generation system
CN101976850A (en) * 2010-10-11 2011-02-16 江西省电力科学研究院 Direct-current side control method for midline arm control model of four bridge arm photovoltaic inverter
CN102158062A (en) * 2011-05-20 2011-08-17 北京国电四维清洁能源技术有限公司 Photovoltaic grid-connected inverter
CN105606935A (en) * 2016-02-04 2016-05-25 阳光电源股份有限公司 DC branch monitoring device for photovoltaic inversion system
CN116938019A (en) * 2023-07-27 2023-10-24 苏州海鹏科技有限公司 Control method of three-phase photovoltaic energy storage inverter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101877548A (en) * 2009-04-28 2010-11-03 新疆新能源股份有限公司 Three-phase four-leg inverter used for photovoltaic grid-connected power generation and photovoltaic grid-connected power generation system
CN101976850A (en) * 2010-10-11 2011-02-16 江西省电力科学研究院 Direct-current side control method for midline arm control model of four bridge arm photovoltaic inverter
CN101976850B (en) * 2010-10-11 2012-09-26 江西省电力科学研究院 Direct-current side control method for midline arm control model of four bridge arm photovoltaic inverter
CN102158062A (en) * 2011-05-20 2011-08-17 北京国电四维清洁能源技术有限公司 Photovoltaic grid-connected inverter
CN105606935A (en) * 2016-02-04 2016-05-25 阳光电源股份有限公司 DC branch monitoring device for photovoltaic inversion system
CN105606935B (en) * 2016-02-04 2018-08-03 阳光电源股份有限公司 A kind of photovoltaic inverting system direct current branch monitoring device
CN116938019A (en) * 2023-07-27 2023-10-24 苏州海鹏科技有限公司 Control method of three-phase photovoltaic energy storage inverter

Similar Documents

Publication Publication Date Title
CN101877548B (en) For three-phase four-leg inverter and the grid-connected photovoltaic system of parallel network power generation
CN200994112Y (en) Three-phase photovaltaic grid-connected inverter
CN101917011B (en) Power quality comprehensive control method and device for electric railway traction power supply system
CN102097966A (en) Cascade megawatt photovoltaic grid-connected inverter
CN103401462B (en) Based on the single-phase chain static synchronous compensator of three level H bridge cascade
CN102916435B (en) A kind of battery energy storage power conversion system containing Z source network and control method thereof
CN103236800B (en) Novel topological structure voltage source type inverter and adjusting method
CN112072716A (en) Power distribution network terminal electric energy router and control method thereof
CN102624274A (en) Interleaving parallel grid-connected inverter and control method thereof
CN110739839B (en) Charging method for extra-high voltage flexible direct-current full-bridge half-bridge hybrid converter
CN103915856A (en) Base station grid connected-charging photovoltaic micro-inverter system and control method thereof
CN201435690Y (en) Three-phase inverter with four bridge legs for photovoltaic interconnected generation and photovoltaic interconnected generation system
CN203399013U (en) Static synchronous compensator based on three-level H bridge cascade and voltage source inversion module
CN102148501B (en) Disturbance generation device for wind power station
CN102570488B (en) Power conversion system based on energy storage of lithium battery and control method thereof
CN101567567A (en) Carrier shifting inversion large power photovoltaic grid-connection system and control method thereof
WO2012010055A1 (en) Topology for modular multilevel converter-based transformerless inductance energy-saving
CN114498711A (en) Low-frequency power transmission system and control mode thereof
CN103840474A (en) Main circuit topology structure of medium-high voltage directly suspended type static synchronous reactive compensator
CN102185506B (en) Intelligent photovoltaic inversion method
WO2024098829A1 (en) Current-type inverter input-series output-parallel photovoltaic power generation system
CN108832817A (en) A kind of power conversion controller and method reducing fuel cell low-frequency current ripple
CN102882228A (en) Single-phase non-isolated photovoltaic grid-connected inverter
CN202014100U (en) Dynamic reactive power compensator for photovoltaic power station grid connected inverter
CN202633962U (en) Photovoltaic grid connected and electric energy quality comprehensive control apparatus based on TMS320F2812

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100331

Termination date: 20160428