CN204696954U - A kind of three-phase resonant pole photovoltaic DC-to-AC converter - Google Patents

A kind of three-phase resonant pole photovoltaic DC-to-AC converter Download PDF

Info

Publication number
CN204696954U
CN204696954U CN201520362278.3U CN201520362278U CN204696954U CN 204696954 U CN204696954 U CN 204696954U CN 201520362278 U CN201520362278 U CN 201520362278U CN 204696954 U CN204696954 U CN 204696954U
Authority
CN
China
Prior art keywords
switching device
emitter stage
diode
auxiliary switch
colelctor electrode
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
CN201520362278.3U
Other languages
Chinese (zh)
Inventor
张庆海
王李
王新涛
刘安华
蔡军
孔鹏
鲍景宽
郭峰
于雪光
顾卫山
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.)
Liaocheng Power Supply Co of State Grid Shandong Electric Power Co Ltd
Original Assignee
Liaocheng Power Supply Co of State Grid Shandong Electric Power 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 Liaocheng Power Supply Co of State Grid Shandong Electric Power Co Ltd filed Critical Liaocheng Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority to CN201520362278.3U priority Critical patent/CN204696954U/en
Application granted granted Critical
Publication of CN204696954U publication Critical patent/CN204696954U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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

  • Dc-Dc Converters (AREA)

Abstract

The utility model relates to a kind of three-phase resonant pole photovoltaic DC-to-AC converter, it can realize, and the no-voltage of photovoltaic DC-to-AC converter switching device is opened, the zero current turning-on of auxiliary switch, resonant circuit power is little, all switches all run on zero voltage switch state or Zero Current Switch state, are conducive to the minimizing of switching loss and improve switching frequency.In addition, without the need to detecting direction and the size of load current, all can switching device be made to realize no-voltage open-minded; The voltage stress of element is clamped on direct voltage, is conducive to device and selects to run with circuit; Three-phase no-voltage resonant circuit is independent controlled, is easy to apply various control strategy.The utility model is applicable to the photovoltaic distributed generation unit of middle low power, improves the efficiency of photovoltaic generation.

Description

A kind of three-phase resonant pole photovoltaic DC-to-AC converter
Technical field
The utility model relates to a kind of three-phase resonant pole photovoltaic DC-to-AC converter, belongs to Technics of Power Electronic Conversion and intelligent grid field.
Background technology
The global energy important channel with problem of environmental pollution in short supply is alleviated in the utilization of solar energy, and photovoltaic generation is exactly one of focus of Recent study.Adopt at present ripe electric electronic current change technology to convert solar energy to electric energy, and then realize voltage transformation and power controls.
Along with the success that development and the soft switch technique of power electronic technology are applied in DC converter field, people show keen interest to the application of soft switch technique in inverter.All solution is invested Sofe Switch when relating to the problems that traditional hard switching inverter brings, as: low switching frequency, high switching loss, the instantaneous serious current/voltage spike of switch, to electromagnetic interference and the audio-frequency noise of environment.D.M.Divan take the lead in propose resonant DC link inverter, started the research of resonance inverter, but this circuit have large voltage stress, resonance uncontrollable, can only the shortcomings such as discrete pulse control be applied.Then there is the active-clamp resonant DC link inverter of various improvement, parallel resonance DC link joint inverter, although solve the shortcoming of resonant DC link inverter, but because resonant DC link inverter itself has very strong coupling, when 1 switching tube needs zero voltage condition, the necessary resonance of whole busbar voltage is to zero, there is a lot of zero passage groove in such busbar voltage, both have impact on the further raising of resonance frequency, and additionally reduced the utilance of direct voltage.Therefore people are concerned about sight on resonant pole inverter again, and representational circuit has auxiliary resonant pole inverter, triangle or star-like resonance absorbing inverter, coupling inductance inverter, transformer subordinate inverter etc.
Summary of the invention
For the deficiencies in the prior art, the utility model discloses a kind of three-phase resonant pole photovoltaic DC-to-AC converter, the no-voltage that it can realize inverter switch device is open-minded, the zero current turning-on of auxiliary switch, resonant circuit power is little, and every phase auxiliary resonance circuit uses 1 bidirectional switch unit, resonant inductance and resonant capacitance less, 1 clamping diode achieves and has low voltage stress, and volume is little, and three-phase no-voltage resonant circuit is independent controlled and be easy to apply various control strategy.
The technical solution of the utility model is: a kind of three-phase resonant pole photovoltaic DC-to-AC converter, comprises photovoltaic array, Boost circuit, DC side storage capacitor C, a phase zero voltage inverting circuit, b phase zero voltage inverting circuit, c phase zero voltage inverting circuit, threephase load; Boost circuit comprises photovoltaic side storage capacitor C 0, Boost boost inductance L 0, Boost circuit switching device S 0, Boost circuit diode VD 0, photovoltaic array and photovoltaic side storage capacitor C 0Be connected in parallel, photovoltaic array output cathode and Boost boost inductance L 0Be connected, Boost boost inductance L 0The other end and Boost circuit switching device S 0Colelctor electrode, Boost circuit diode VD 0Anode be connected, Boost circuit diode VD 0Negative electrode be connected with one end of DC side storage capacitor C, the other end and the Boost circuit switching device S of DC side storage capacitor C 0Emitter stage, photovoltaic array output negative pole be connected; In a phase zero voltage inverting circuit, switching device S 1Colelctor electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 1Emitter stage and anti-paralleled diode D 1Anode be connected, anti-paralleled diode D 1Negative electrode and main switching device S 1Colelctor electrode be connected, switching device S 1Collector and emitter between be parallel with buffer capacitor C 1, switching device S 1Emitter stage and auxiliary switch device S R1Colelctor electrode be connected,Auxiliary switch device S R1Emitter stage and auxiliary switch device S R2Emitter stage be connected, auxiliary switch device S R1Colelctor electrode and anti-paralleled diode D R1Negative electrode be connected, auxiliary switch device S R1Emitter stage and anti-paralleled diode D R1Anode be connected, auxiliary switch device S R2Emitter stage and anti-paralleled diode D R2Anode be connected, auxiliary switch device S R2Colelctor electrode and anti-paralleled diode D R2Negative electrode be connected, auxiliary switch device S R2Colelctor electrode and resonant inductance L RaOne end be connected, resonant inductance L RaThe other end and resonant capacitance C RaOne end and clamp diode D aAnode be connected, resonant capacitance C RaThe other end be connected with photovoltaic array output negative pole, clamp diode D aNegative electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 1Emitter stage and switching device S 2Colelctor electrode be connected, switching device S 2Emitter stage and anti-paralleled diode D 2Anode be connected, anti-paralleled diode D 2Negative electrode and switching device S 2Colelctor electrode be connected, switching device S 2Collector and emitter between be parallel with buffer capacitor C 2, switching device S 2Emitter stage be connected with photovoltaic array output negative pole; In b phase zero voltage inverting circuit, switching device S 3Colelctor electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 3Emitter stage and anti-paralleled diode D 3Anode be connected, anti-paralleled diode D 3Negative electrode and switching device S 3Colelctor electrode be connected, switching device S 3Collector and emitter between be parallel with buffer capacitor C 3, switching device S 3Emitter stage and auxiliary switch device S R3Colelctor electrode be connected, auxiliary switch device S R3Emitter stage and auxiliary switch device S R4Emitter stage be connected, auxiliary switch device S R3Colelctor electrode and anti-paralleled diode D R3Negative electrode be connected, auxiliary switch device S R3Emitter stage and anti-paralleled diode D R3Anode be connected, auxiliary switch device S R4Emitter stage and anti-paralleled diode D R4Anode be connected, auxiliary switch device S R4Colelctor electrode and anti-paralleled diode D R4Negative electrode be connected, auxiliary switch device S R4Colelctor electrode and resonant inductance L RbOne end be connected, resonant inductance L RbThe other end and resonant capacitance C RbOne end and clamp diode D bAnode be connected, resonant capacitance C RbThe other end be connected with photovoltaic array output negative pole, clamp diode D bNegative electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 3Emitter stage and switching device S 4Colelctor electrode be connected, switching device S 4Emitter stage and anti-paralleled diode D 4Anode be connected, anti-paralleled diode D 4Negative electrode and switching device S 4Colelctor electrode be connected, switching device S 4Collector and emitter between be parallel with buffer capacitor C 4, switching device S 4Emitter stage be connected with photovoltaic array output negative pole; In c phase zero voltage inverting circuit, switching device S 5Colelctor electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 5Emitter stage and anti-paralleled diode D 5Anode be connected, anti-paralleled diode D 5Negative electrode and switching device S 5Colelctor electrode be connected, switching device S 5Collector and emitter between be parallel with buffer capacitor C 5, switching device S 5Emitter stage and auxiliary switch device S R5Colelctor electrode be connected, auxiliary switch device S R5Emitter stage and auxiliary switch device S R6Emitter stage be connected, auxiliary switch device S R5Colelctor electrode and anti-paralleled diode D R5Negative electrode be connected, auxiliary switch device S R5Emitter stage and anti-paralleled diode D R5Anode be connected, auxiliary switch device S R6Emitter stage and anti-paralleled diode D R6Anode be connected, auxiliary switch device S R6Colelctor electrode and anti-paralleled diode D R6Negative electrode be connected, auxiliary switch device S R6Colelctor electrode and resonant inductance L RcOne end be connected, resonant inductance L RcThe other end and resonant capacitance C RcOne end and clamp diode D cAnode be connected, resonant capacitance C RcThe other end be connected with photovoltaic array output negative pole, clamp diode D cNegative electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 5Emitter stage and switching device S 6Colelctor electrode be connected, switching device S 6Emitter stage and anti-paralleled diode D 6Anode be connected, anti-paralleled diode D 6Negative electrode and switching device S 6Colelctor electrode be connected, switching device S 6Collector and emitter between be parallel with buffer capacitor C 6,Switching device S 6Emitter stage be connected with photovoltaic array output negative pole; Respectively by a phase zero voltage inverting circuit breaker in middle device S 2Colelctor electrode, b phase zero voltage inverting circuit breaker in middle device S 4Colelctor electrode, c phase zero voltage inverting circuit breaker in middle device S 6Colelctor electrode draw the output of a, b, c three-phase output end as three-phase resonant pole photovoltaic DC-to-AC converter, and be connected with threephase load.
The beneficial effects of the utility model are: 1, Boost circuit realizes maximal power tracing, be independent controlled, make photovoltaic DC-to-AC converter be easy to apply various control strategy between three-phase no-voltage resonant circuit; 2, all switches all run on zero voltage switch state or Zero Current Switch state, are conducive to the minimizing of switching loss and improve switching frequency, improve the efficiency of photovoltaic generation; 3, without the need to detecting direction and the size of load current, all can main switch be made to realize no-voltage open-minded; 4, the voltage stress of element is clamped on direct voltage, is conducive to device and selects to run with circuit; 5, blocked by diode during resonance current zero passage, there is no reverse recovery current and loss.
Accompanying drawing explanation
Fig. 1 is the utility model topological structure schematic diagram.
Fig. 2 is the equivalent circuit diagram of the utility model a phase zero voltage inverting circuit.
Fig. 3 is the feature work oscillogram of the utility model a phase zero voltage inverting circuit.
Embodiment
Figure 1 shows that three-phase resonant pole photovoltaic DC-to-AC converter structural representation, comprise photovoltaic array, Boost circuit, DC side storage capacitor C, a phase zero voltage inverting circuit, b phase zero voltage inverting circuit, c phase zero voltage inverting circuit, threephase load; Boost circuit comprises photovoltaic side storage capacitor C 0, Boost boost inductance L 0, Boost circuit switching device S 0, Boost circuit diode VD 0, photovoltaic array and photovoltaic side storage capacitor C 0Be connected in parallel, photovoltaic array output cathode and Boost boost inductance L 0Be connected, Boost boost inductance L 0The other end and Boost circuit switching device S 0Colelctor electrode, Boost circuit diode VD 0Anode be connected, Boost circuit diode VD 0Negative electrode be connected with one end of DC side storage capacitor C, the other end and the Boost circuit switching device S of DC side storage capacitor C 0Emitter stage, photovoltaic array output negative pole be connected; In a phase zero voltage inverting circuit, switching device S 1Colelctor electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 1Emitter stage and anti-paralleled diode D 1Anode be connected, anti-paralleled diode D 1Negative electrode and main switching device S 1Colelctor electrode be connected, switching device S 1Collector and emitter between be parallel with buffer capacitor C 1, switching device S 1Emitter stage and auxiliary switch device S R1Colelctor electrode be connected,Auxiliary switch device S R1Emitter stage and auxiliary switch device S R2Emitter stage be connected, auxiliary switch device S R1Colelctor electrode and anti-paralleled diode D R1Negative electrode be connected, auxiliary switch device S R1Emitter stage and anti-paralleled diode D R1Anode be connected, auxiliary switch device S R2Emitter stage and anti-paralleled diode D R2Anode be connected, auxiliary switch device S R2Colelctor electrode and anti-paralleled diode D R2Negative electrode be connected, auxiliary switch device S R2Colelctor electrode and resonant inductance L RaOne end be connected, resonant inductance L RaThe other end and resonant capacitance C RaOne end and clamp diode D aAnode be connected, resonant capacitance C RaThe other end be connected with photovoltaic array output negative pole, clamp diode D aNegative electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 1Emitter stage and switching device S 2Colelctor electrode be connected, switching device S 2Emitter stage and anti-paralleled diode D 2Anode be connected, anti-paralleled diode D 2Negative electrode and switching device S 2Colelctor electrode be connected, switching device S 2Collector and emitter between be parallel with buffer capacitor C 2, switching device S 2Emitter stage be connected with photovoltaic array output negative pole; In b phase zero voltage inverting circuit, switching device S 3Colelctor electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 3Emitter stage and anti-paralleled diode D 3Anode be connected, anti-paralleled diode D 3Negative electrode and switching device S 3Colelctor electrode be connected, switching device S 3Collector and emitter between be parallel with buffer capacitor C 3, switching device S 3Emitter stage and auxiliary switch device S R3Colelctor electrode be connected, auxiliary switch device S R3Emitter stage and auxiliary switch device S R4Emitter stage be connected, auxiliary switch device S R3Colelctor electrode and anti-paralleled diode D R3Negative electrode be connected, auxiliary switch device S R3Emitter stage and anti-paralleled diode D R3Anode be connected, auxiliary switch device S R4Emitter stage and anti-paralleled diode D R4Anode be connected, auxiliary switch device S R4Colelctor electrode and anti-paralleled diode D R4Negative electrode be connected, auxiliary switch device S R4Colelctor electrode and resonant inductance L RbOne end be connected, resonant inductance L RbThe other end and resonant capacitance C RbOne end and clamp diode D bAnode be connected, resonant capacitance C RbThe other end be connected with photovoltaic array output negative pole, clamp diode D bNegative electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 3Emitter stage and switching device S 4Colelctor electrode be connected, switching device S 4Emitter stage and anti-paralleled diode D 4Anode be connected, anti-paralleled diode D 4Negative electrode and switching device S 4Colelctor electrode be connected, switching device S 4Collector and emitter between be parallel with buffer capacitor C 4, switching device S 4Emitter stage be connected with photovoltaic array output negative pole; In c phase zero voltage inverting circuit, switching device S 5Colelctor electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 5Emitter stage and anti-paralleled diode D 5Anode be connected, anti-paralleled diode D 5Negative electrode and switching device S 5Colelctor electrode be connected, switching device S 5Collector and emitter between be parallel with buffer capacitor C 5, switching device S 5Emitter stage and auxiliary switch device S R5Colelctor electrode be connected, auxiliary switch device S R5Emitter stage and auxiliary switch device S R6Emitter stage be connected, auxiliary switch device S R5Colelctor electrode and anti-paralleled diode D R5Negative electrode be connected, auxiliary switch device S R5Emitter stage and anti-paralleled diode D R5Anode be connected, auxiliary switch device S R6Emitter stage and anti-paralleled diode D R6Anode be connected, auxiliary switch device S R6Colelctor electrode and anti-paralleled diode D R6Negative electrode be connected, auxiliary switch device S R6Colelctor electrode and resonant inductance L RcOne end be connected, resonant inductance L RcThe other end and resonant capacitance C RcOne end and clamp diode D cAnode be connected, resonant capacitance C RcThe other end be connected with photovoltaic array output negative pole, clamp diode D cNegative electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 5Emitter stage and switching device S 6Colelctor electrode be connected, switching device S 6Emitter stage and anti-paralleled diode D 6Anode be connected, anti-paralleled diode D 6Negative electrode and switching device S 6Colelctor electrode be connected, switching device S 6Collector and emitter between be parallel with buffer capacitor C 6,Switching device S 6Emitter stage be connected with photovoltaic array output negative pole; Respectively by a phase zero voltage inverting circuit breaker in middle device S 2Colelctor electrode, b phase zero voltage inverting circuit breaker in middle device S 4Colelctor electrode, c phase zero voltage inverting circuit breaker in middle device S 6Colelctor electrode draw the output of a, b, c three-phase output end as three-phase resonant pole photovoltaic DC-to-AC converter, and be connected with threephase load.
Boost circuit realizes maximal power tracing, is independent controlled, to simplify the analysis, does following hypothesis: 1, device is ideal operation state between the resonant network of three-phase; 2, photovoltaic array, Boost circuit, DC side storage capacitor C are equivalent to a voltage source U dc.
The a phase zero voltage inverting circuit getting three-phase resonant pole photovoltaic DC-to-AC converter is analyzed, and its equivalent electric circuit as shown in Figure 2.Wherein, I ofor load current, i lrait is resonant inductance electric current; In figure, positive direction is from left to right, u crabe the voltage at resonant capacitance two ends, positive direction is from top to bottom, if now load current is just, namely flows to load from inverter switch device, and remains unchanged within an inverter switching device cycle.The signature waveform of equivalent electric circuit shown in Fig. 2 as shown in Figure 3.
Below in conjunction with Fig. 2 and Fig. 3, each mode of operation of the present utility model is specifically described.
Mode of operation 0(t ~ t 0): initial condition, S 1be conducted through load current I o, S r1, S r2all do not work.
Mode of operation 1(t 0~ t 1): at t 0in the moment, open S r1, at resonant inductance L raeffect is lower is zero current turning-on, and electric current flows through S 1, S r1, D r2, to L ra, C racharging, u crarise.To time t 1, flow through i lrareach threshold value I t1, now u craequal U t1, this mode of operation terminates.If U t1equal U dc, resonance is complex resonance pattern.Next mode of operation is mode of operation 2, if U t1be less than U dc, resonance is Semi-resonance pattern, and next mode of operation is mode of operation 3.
Mode of operation 2(t 1~ t 2): u crareach U dc, D aconducting, electric current is at S 1, S r1, D r2, L ra, D amiddle formation circulation.I lrakeep I t1constant, u crakeep U dcconstant.
Mode of operation 3(t 2~ t 3): at t 2in the moment, turn off S 1, I owith i lragive C together 1charging, to C 2electric discharge, if circuit is complex resonance state, L rawith C 1, C 2resonance; If circuit is Semi-resonance state, L ra, C rawith C 1, C 2resonance.At t 3moment, C 2both end voltage drops to zero, D 2conducting.
Mode of operation 4(t 3~ t 4): during complex resonance pattern, u craremain unchanged, L raboth end voltage is U dc, i lralinear decline, t 4moment reduces to zero; During Semi-resonance pattern, L rawith C racontinue resonance to t 4moment i lrareduce to zero.S is opened in during this period of time 2, be zero voltage switch state.
Mode of operation 5(t 4~ t 6): at t 4moment, due to D r2blocking-up, resonant branch electric current keeps zero constant, at t 5moment turns off S r1for Zero Current Switch state, be manage normal output stage under inverter, from the upper pipe S of mode of operation 0 1export the change of current and arrive time pipe S 2.
Mode of operation 6(t 6~ t 7): at t 6in the moment, open S r2for Zero Current Switch state, at electric capacity C 2the lower soft switching S of effect 2, C rawith L raresonance, t 7moment i lrareverse increase is until i lra=-I 0, at this moment diode D 2cut-off.
Mode of operation 7(t 7~ t 8): at t 7moment, similar with mode of operation 3, L rawith C 1, C 2, C raresonance, to t 8moment, C 2voltage u c2be elevated to U dctime, D 1open-minded.
Mode of operation 8(t 8~ t 9): at t 8moment, D 1open-minded, L rawith C raresonance, at i lrasize be down to I 0before, D 1all the time conducting, until t 9, i lra=-I 0, D 1turn off.Conducting S in this mode of operation 1for zero voltage switch state.
Mode of operation 9(t 9~ t 11): at t 9moment, i lra=-I 0, D 1turn off, electric current is from S 1flow to load, resonance condition and mode of operation 8 similar, to t 10moment, i lrato zero, resonance terminates, to t 11in the moment, turn off S r2for Zero Current Switch state.
After mode of operation 9, getting back to again mode of operation 0, is inverter is managed normal output stage, from the lower pipe S of mode of operation 5 2export the change of current to upper pipe S 1.So far, a complete load current is positive PWM end cycle.Mode of operation when load current is negative is similar with it.

Claims (1)

1. a three-phase resonant pole photovoltaic DC-to-AC converter, is characterized in that, comprises photovoltaic array, Boost circuit, DC side storage capacitor C, a phase zero voltage inverting circuit, b phase zero voltage inverting circuit, c phase zero voltage inverting circuit, threephase load; Boost circuit comprises photovoltaic side storage capacitor C 0, Boost boost inductance L 0, Boost circuit switching device S 0, Boost circuit diode VD 0, photovoltaic array and photovoltaic side storage capacitor C 0Be connected in parallel, photovoltaic array output cathode and Boost boost inductance L 0Be connected, Boost boost inductance L 0The other end and Boost circuit switching device S 0Colelctor electrode, Boost circuit diode VD 0Anode be connected, Boost circuit diode VD 0Negative electrode be connected with one end of DC side storage capacitor C, the other end and the Boost circuit switching device S of DC side storage capacitor C 0Emitter stage, photovoltaic array output negative pole be connected; In a phase zero voltage inverting circuit, switching device S 1Colelctor electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 1Emitter stage and anti-paralleled diode D 1Anode be connected, anti-paralleled diode D 1Negative electrode and main switching device S 1Colelctor electrode be connected, switching device S 1Collector and emitter between be parallel with buffer capacitor C 1, switching device S 1Emitter stage and auxiliary switch device S R1Colelctor electrode be connected,Auxiliary switch device S R1Emitter stage and auxiliary switch device S R2Emitter stage be connected, auxiliary switch device S R1Colelctor electrode and anti-paralleled diode D R1Negative electrode be connected, auxiliary switch device S R1Emitter stage and anti-paralleled diode D R1Anode be connected, auxiliary switch device S R2Emitter stage and anti-paralleled diode D R2Anode be connected, auxiliary switch device S R2Colelctor electrode and anti-paralleled diode D R2Negative electrode be connected, auxiliary switch device S R2Colelctor electrode and resonant inductance L RaOne end be connected, resonant inductance L RaThe other end and resonant capacitance C RaOne end and clamp diode D aAnode be connected, resonant capacitance C RaThe other end be connected with photovoltaic array output negative pole, clamp diode D aNegative electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 1Emitter stage and switching device S 2Colelctor electrode be connected, switching device S 2Emitter stage and anti-paralleled diode D 2Anode be connected, anti-paralleled diode D 2Negative electrode and switching device S 2Colelctor electrode be connected, switching device S 2Collector and emitter between be parallel with buffer capacitor C 2, switching device S 2Emitter stage be connected with photovoltaic array output negative pole; In b phase zero voltage inverting circuit, switching device S 3Colelctor electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 3Emitter stage and anti-paralleled diode D 3Anode be connected, anti-paralleled diode D 3Negative electrode and switching device S 3Colelctor electrode be connected, switching device S 3Collector and emitter between be parallel with buffer capacitor C 3, switching device S 3Emitter stage and auxiliary switch device S R3Colelctor electrode be connected, auxiliary switch device S R3Emitter stage and auxiliary switch device S R4Emitter stage be connected, auxiliary switch device S R3Colelctor electrode and anti-paralleled diode D R3Negative electrode be connected, auxiliary switch device S R3Emitter stage and anti-paralleled diode D R3Anode be connected, auxiliary switch device S R4Emitter stage and anti-paralleled diode D R4Anode be connected, auxiliary switch device S R4Colelctor electrode and anti-paralleled diode D R4Negative electrode be connected, auxiliary switch device S R4Colelctor electrode and resonant inductance L RbOne end be connected, resonant inductance L RbThe other end and resonant capacitance C RbOne end and clamp diode D bAnode be connected, resonant capacitance C RbThe other end be connected with photovoltaic array output negative pole, clamp diode D bNegative electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 3Emitter stage and switching device S 4Colelctor electrode be connected, switching device S 4Emitter stage and anti-paralleled diode D 4Anode be connected, anti-paralleled diode D 4Negative electrode and switching device S 4Colelctor electrode be connected, switching device S 4Collector and emitter between be parallel with buffer capacitor C 4, switching device S 4Emitter stage be connected with photovoltaic array output negative pole; In c phase zero voltage inverting circuit, switching device S 5Colelctor electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 5Emitter stage and anti-paralleled diode D 5Anode be connected, anti-paralleled diode D 5Negative electrode and switching device S 5Colelctor electrode be connected, switching device S 5Collector and emitter between be parallel with buffer capacitor C 5, switching device S 5Emitter stage and auxiliary switch device S R5Colelctor electrode be connected, auxiliary switch device S R5Emitter stage and auxiliary switch device S R6Emitter stage be connected, auxiliary switch device S R5Colelctor electrode and anti-paralleled diode D R5Negative electrode be connected, auxiliary switch device S R5Emitter stage and anti-paralleled diode D R5Anode be connected, auxiliary switch device S R6Emitter stage and anti-paralleled diode D R6Anode be connected, auxiliary switch device S R6Colelctor electrode and anti-paralleled diode D R6Negative electrode be connected, auxiliary switch device S R6Colelctor electrode and resonant inductance L RcOne end be connected, resonant inductance L RcThe other end and resonant capacitance C RcOne end and clamp diode D cAnode be connected, resonant capacitance C RcThe other end be connected with photovoltaic array output negative pole, clamp diode D cNegative electrode and Boost circuit diode VD 0Negative electrode be connected, switching device S 5Emitter stage and switching device S 6Colelctor electrode be connected, switching device S 6Emitter stage and anti-paralleled diode D 6Anode be connected, anti-paralleled diode D 6Negative electrode and switching device S 6Colelctor electrode be connected, switching device S 6Collector and emitter between be parallel with buffer capacitor C 6,Switching device S 6Emitter stage be connected with photovoltaic array output negative pole; Respectively by a phase zero voltage inverting circuit breaker in middle device S 2Colelctor electrode, b phase zero voltage inverting circuit breaker in middle device S 4Colelctor electrode, c phase zero voltage inverting circuit breaker in middle device S 6Colelctor electrode draw the output of a, b, c three-phase output end as three-phase resonant pole photovoltaic DC-to-AC converter, and be connected with threephase load.
CN201520362278.3U 2015-06-01 2015-06-01 A kind of three-phase resonant pole photovoltaic DC-to-AC converter Expired - Fee Related CN204696954U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520362278.3U CN204696954U (en) 2015-06-01 2015-06-01 A kind of three-phase resonant pole photovoltaic DC-to-AC converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520362278.3U CN204696954U (en) 2015-06-01 2015-06-01 A kind of three-phase resonant pole photovoltaic DC-to-AC converter

Publications (1)

Publication Number Publication Date
CN204696954U true CN204696954U (en) 2015-10-07

Family

ID=54237203

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520362278.3U Expired - Fee Related CN204696954U (en) 2015-06-01 2015-06-01 A kind of three-phase resonant pole photovoltaic DC-to-AC converter

Country Status (1)

Country Link
CN (1) CN204696954U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107332449A (en) * 2016-04-28 2017-11-07 中兴通讯股份有限公司 A kind of three-phase circuit device and its method for realizing rectification
CN109309411A (en) * 2017-07-26 2019-02-05 铃木株式会社 Rotating electric machine
CN109980974A (en) * 2019-03-15 2019-07-05 辽宁石油化工大学 A kind of structure and the simple auxiliary resonance polar form soft switching inverter of control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107332449A (en) * 2016-04-28 2017-11-07 中兴通讯股份有限公司 A kind of three-phase circuit device and its method for realizing rectification
CN109309411A (en) * 2017-07-26 2019-02-05 铃木株式会社 Rotating electric machine
CN109980974A (en) * 2019-03-15 2019-07-05 辽宁石油化工大学 A kind of structure and the simple auxiliary resonance polar form soft switching inverter of control

Similar Documents

Publication Publication Date Title
CN107493025B (en) A kind of loaded self-adaptive change of current control method of Resonant DC Link three-phase inverter
CN103701356B (en) A kind of two auxiliary resonance polar form three phase soft switch inverter
CN202535290U (en) Photovoltaic inverter circuit
CN203243242U (en) Single-phase photovoltaic grid-connected inverter
CN105743344A (en) Isolated three-level bidirectional DC-DC converter with coupling inductor
CN204681264U (en) A kind of non-bridge PFC switching power circuit
CN103929058A (en) Two-phase interleaved converter based on coupled inductors
CN103208937A (en) Single-phase photovoltaic grid-connected inverter
CN204442176U (en) A kind of switched inductors type accurate Z source DC-DC converter circuit
CN204696954U (en) A kind of three-phase resonant pole photovoltaic DC-to-AC converter
CN203675000U (en) Photovoltaic grid-connection micro inverter
CN205377786U (en) Two pressure reducing type photovoltaic power generation system
CN204928737U (en) Photovoltaic power generation device based on two buck dc -to -ac converters
CN205195559U (en) Novel DC -DC converter steps up
CN204948016U (en) A kind of photovoltaic power generation apparatus adopting zero voltage switch auxiliary resonance
CN204947919U (en) A kind of parallel resonance no-voltage photovoltaic power generation apparatus
CN203151389U (en) Control circuit of three-phase high power factor rectifier
CN205754197U (en) Photovoltaic generating system with low energy consumption auxiliary circuit
CN204696953U (en) A kind of Z-source inverter being applicable to photovoltaic generation
CN204442168U (en) A kind of based on without bridge CUK isolated form Three Phase Power Factor Correction Converter
CN103618448B (en) The two-tube DC converter of coupling inductance with charge pump
CN204928612U (en) Photovoltaic power generation device with auxiliary resonant circuit
CN204696955U (en) A kind of photovoltaic DC-to-AC converter adopting transformer auxiliary resonance
CN205304268U (en) Crisscross parallelly connected type photovoltaic grid -connected inverter
CN204707054U (en) A kind of soft switching inverter being applicable to photovoltaic generation

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
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20151007

Termination date: 20160601