CN204761317U - Mix conversion systems based on rectification is not controlled with polycell to rectification of three -phase PWM - Google Patents
Mix conversion systems based on rectification is not controlled with polycell to rectification of three -phase PWM Download PDFInfo
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- CN204761317U CN204761317U CN201520277449.2U CN201520277449U CN204761317U CN 204761317 U CN204761317 U CN 204761317U CN 201520277449 U CN201520277449 U CN 201520277449U CN 204761317 U CN204761317 U CN 204761317U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a mix conversion systems based on rectification is not controlled with polycell to rectification of three -phase PWM. This mixes conversion systems and mainly comprises three -phase reactor, three phase voltage type PWM rectifier module, the uncontrollable rectifier bridge module group of three -phase, electric capacity and DSP control circuit, three phase voltage type PWM rectifier module's input is parallelly connected with the input of each three -phase uncontrollable rectifier bridge module, three phase voltage type PWM rectifier module can work and taking the load and do not taking two kinds of condition of load, three phase voltage type PWM rectifier module when not taking the load only makes reactive power compensation when work, three -phase each module of not controlling rectifier bridge module group can work and independently taking the parallelly connected two kinds of condition of same load of taking of load and all outputs, this mixture rectification system have the input power of unit factor, current on line side low -harmonic -wave, suitable big power output, with low costs, control simple advantage such as should go.
Description
Technical field
The utility model relates to three phase rectifier technology, particularly relates to mix AC/DC transformation system based on three-phase voltage type PWM rectification and multiple unit uncontrollable rectifier, belongs to power electronics alternating-current technique field.
Background technology
Along with development that is industrial and economic technology, also more and more higher to the requirement of large power supply, traditional high-power factor of large power supply harmonic wave is low, not only there is considerable influence can cause larger loss to electrical network simultaneously, often adopting active filter, PFC, Three-phase PWM Voltage Rectifier to realize unity power factor; Wherein Three-phase PWM Voltage Rectifier can eliminate Harmonics of Input from root, and there is unity power factor and be subject to current power electronic applications extensive concern, but due to its high cost, there is the technical barriers such as circulation and cannot popularize use in multi-machine parallel connection.
Utility model content
Improve that large power supply is humorous involves power factor Problems existing for existing, the utility model object is the high-power mixing AC/DC transformation system providing a kind of reliable and stable low current harmonics unit power factor with low cost.
The utility model is for achieving the above object, and the technical scheme adopted is as follows:
Mix AC/DC transformation system based on three-phase voltage type PWM rectification and multiple unit uncontrollable rectifier, comprising: three-phase reactor, three-phase voltage type PWM rectification module, the uncontrollable rectifier bridge module group of three-phase, electric capacity, DSP control circuit.Described three-phase reactor one end is connected with three phase network, the other end is connected with the mid point of three-phase voltage type PWM rectification module brachium pontis and the mid point of the uncontrollable rectifier bridge module brachium pontis of each three-phase respectively, and namely three-phase voltage type PWM rectification module is connected in parallel with the input of the uncontrollable rectifier bridge module group of three-phase; Described three-phase voltage type PWM rectification module adopts six Switch Three-Phase half bridge circuit topologys; The modules of described three-phase uncontrollable rectifier device module group forms by three-phase diode rectifier bridge module.
The output of described transformation system has plurality of optional mode of operation: in the uncontrollable rectifier bridge module of the three-phase described in (1) group, the output of each three-phase uncontrollable rectifier bridge module is all connected with electric capacity CL with same load RL and realizes parallel connection, and the not bringing onto load work of three-phase voltage type PWM rectification module, three-phase voltage type PWM rectification module exports and is only connected with electric capacity C0; (2) in the uncontrollable rectifier bridge module of the three-phase described in group, the output of each three-phase uncontrollable rectifier bridge module is all connected with electric capacity CL with same load RL and realizes parallel connection, and the work of three-phase voltage type PWM rectification module bringing onto load, the now output of three-phase voltage type PWM rectification module is in parallel with electric capacity C0, load R*; (3) the output free band load separately (R1...RN) of each three-phase uncontrollable rectifier bridge module in the uncontrollable rectifier bridge module of the three-phase described in group, each load is in parallel with electric capacity (C1...CN) respectively, and the not bringing onto load work of three-phase voltage type PWM rectification module, the output of three-phase voltage type PWM rectification module is only connected with electric capacity C0; (4) the output free band load separately (R1...RN) of each three-phase uncontrollable rectifier bridge module in the uncontrollable rectifier bridge module of the three-phase described in group, each load is in parallel with electric capacity (C1...CN) respectively, and the work of three-phase voltage type PWM rectification module bringing onto load, now the output of three-phase voltage type PWM rectification module is in parallel with electric capacity C0, load R*.
The inductance value of described three-phase reactor can be selected according to the requirement of system harmonics and power, is 0.1mH ~ 1.5mH as its scope preferred; The capacitance of described electric capacity is selected according to the requirement of system output voltage ripple, is 2000uf ~ 6000uf as its scope preferred.
For described above based on three-phase voltage type PWM rectification with the AC/DC transformation system control method that mixes of multiple unit uncontrollable rectifier be: (a) utilizes phase lock circuitry to obtain the zero crossing of a phase electrical network ea, DSP calculates grid cycle in real time according to the zero crossing of a phase electrical network ea, and change control cycle with this, calculate three-phase input line voltage value (ea, eb, ec) according to the zero crossing of a phase electrical network ea simultaneously; B () utilizes the current Hall transducer input current value (ia, ib, ic) of sampling three-phase reactor, the DC voltage value U* at employing point platen press sampling three-phase voltage type PWM rectification module DC bus capacitor C0 two ends respectively, and be converted to 0 ~ 3V voltage by conditioning discharge circuit; C () DSP control circuit carries out controlling calculation according to sampled value ((a) and (b) obtains), concrete control method can adopt conventional feed forward decoupling control, predictive current control, fuzzy control to realize unity power factor control; Under described several mode of operation and different power stage ranks, same control method can be adopted, do not need independent adjustment, simple.
Compared with prior art, the beneficial effects of the utility model are:
1, cost is low and efficiency is high;
Native system structure is simple, only needs control three-phase voltage type PWM rectification module during use, and the three-phase uncontrollable rectifier module in parallel according to the demand increase and decrease of work, cost is low, and efficiency is high.
2, the controllability of three-phase uncontrollable rectifier module DC side output voltage is realized;
Adopt the structure of native system, control three-phase voltage type PWM rectification module input side voltage by controlling AC reactor input current, thus realize the controlled of three-phase voltage type PWM rectification module DC side output voltage.Because the input of native system three-phase voltage type PWM rectification module and N unit three-phase uncontrollable rectifier module group is connected in parallel, then can realize the controlled of N unit three-phase uncontrollable rectifier module group DC side output voltage.
3, unity power factor is inputted;
Native system directly controls AC reactor input current by three-phase voltage type PWM rectification module, indirect control three-phase voltage type PWM rectification module exchanges input side electric current, thus adjustment three-phase voltage type PWM rectification module is to the reactive power compensation of system, realizes exchanging input side unity power factor and runs.
4, system is reliable and stable, there is not circulation.
Containing three-phase uncontrollable rectifier module in native system, due to the single-phase conductivity of diode, system can not produce circulation.Because system only needs control three-phase voltage type PWM rectification module, control two and above three-phase voltage type PWM rectification module is needed to compare more reliable and stable with existing system.
Accompanying drawing explanation
Fig. 1 a of the present utility modelly mixes AC/DC transformation system structured flowchart based on three-phase voltage type PWM rectification and multiple unit uncontrollable rectifier;
Fig. 1 b is three-phase voltage type PWM rectification module structure chart;
Fig. 1 c is three-phase uncontrollable rectifier modular unit structure chart;
Fig. 1 d is three-phase uncontrollable rectifier bridge module group load-carrying structure chart separately;
Fig. 1 e is the load-carrying structure chart of three-phase voltage type PWM rectification module;
Fig. 2 a ~ Fig. 2 c is the design sketch of matlab simulation data voltage U * (three-phase voltage type PWM rectification module DC side output voltage), Uo when being operated in pattern () (when the uncontrollable rectifier bridge module group of three-phase is in parallel DC side output voltage) and input voltage ea (electrical network a phase voltage), input current ia (exchange and input a phase current) respectively.
Fig. 3 a ~ Fig. 3 c is the design sketch of matlab simulation data voltage U * (three-phase voltage type PWM rectification module DC side output voltage), Uo when being operated in pattern (two) (when the uncontrollable rectifier bridge module group of three-phase is in parallel DC side output voltage) and input voltage ea (electrical network a phase voltage), input current ia (AC a phase input current) respectively.
Fig. 4 a ~ Fig. 4 c is matlab simulation data voltage U * (three-phase voltage type PWM rectification module DC side output voltage), U when being operated in pattern (three) respectively
oNthe design sketch of (N unit three-phase uncontrollable rectifier bridge module DC side output voltage separately) and input voltage ea (electrical network a phase voltage), input current ia (AC a phase input current).
Fig. 5 a ~ Fig. 5 c is matlab simulation data voltage U * (three-phase voltage type PWM rectification module DC side output voltage), U when being operated in pattern (four) respectively
oNthe design sketch of (N unit three-phase uncontrollable rectifier bridge module DC side output voltage separately) and input voltage ea (electrical network a phase voltage), input current ia (AC a phase input current).
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but enforcement of the present utility model and protection are not limited thereto, and do not describe part in detail especially if having below, is all that those skilled in the art can refer to existing techniques in realizing.
AC/DC transformation system is mixed based on three-phase voltage type PWM rectification and multiple unit uncontrollable rectifier, as shown in Fig. 1 a ~ Fig. 1 e, comprise: three-phase reactor L, three-phase voltage type PWM rectification circuit, the uncontrollable rectifier bridge module group of three-phase, electric capacity (C0, CL, C1...CN), DSP control circuit, N >=1.Described three-phase reactor one end is connected with three phase network, the other end (A, B, C) is connected with the mid point of three-phase voltage type PWM rectification module brachium pontis and the mid point of each three-phase uncontrollable rectifier bridge module group brachium pontis respectively, and namely the input of three-phase voltage type PWM rectification module and the uncontrollable rectifier bridge module group of three-phase is connected in parallel; Described three-phase voltage type PWM rectification module adopts six Switch Three-Phase half bridge circuit topologys; The modules of described three-phase uncontrollable rectifier device module group forms by three-phase diode rectifier bridge module.
The output of described transformation system has plurality of optional mode of operation: in the uncontrollable rectifier bridge module of the three-phase described in (1) group, the output of each three-phase uncontrollable rectifier bridge module is all connected with electric capacity CL with same load RL and realizes parallel connection, and the not bringing onto load work of three-phase voltage type PWM rectification module, three-phase voltage type PWM rectification module exports and is only connected with electric capacity C0; (2) in the uncontrollable rectifier bridge module of the three-phase described in group, the output of each three-phase uncontrollable rectifier bridge module is all connected with electric capacity CL with same load RL and realizes parallel connection, and the work of three-phase voltage type PWM rectification module bringing onto load, the now output of three-phase voltage type PWM rectification module is in parallel with electric capacity C0, load R*; (3) the output free band load separately (R1...RN) of each three-phase uncontrollable rectifier bridge module in the uncontrollable rectifier bridge module of the three-phase described in group, each load is in parallel with electric capacity (C1...CN) respectively, and the not bringing onto load work of three-phase voltage type PWM rectification module, the output of three-phase voltage type PWM rectification module is only connected with electric capacity C0; (4) the output free band load separately (R1...RN) of each three-phase uncontrollable rectifier bridge module in the uncontrollable rectifier bridge module of the three-phase described in group, each load is in parallel with electric capacity (C1...CN) respectively, and the work of three-phase voltage type PWM rectification module bringing onto load, now the output of three-phase voltage type PWM rectification module is in parallel with electric capacity C0, load R*.Described three-phase voltage type PWM rectification module not bringing onto load work time, now only make reactive power compensation; And when bringing onto load works, both made reactive power compensation, also carry out power stage.
The inductance value of described three-phase reactor L can be selected according to the requirement of system harmonics and power, and preferable range is 0.1mH ~ 1.5mH; The capacitance of described electric capacity (C0, CL, C1...CN) is selected according to the requirement of system output voltage ripple, and preferable range is 2000uf ~ 6000uf.
For described in above-mentioned any one based on three-phase voltage type PWM rectification with the AC/DC transformation system control method that mixes of multiple unit uncontrollable rectifier being: (a) utilizes phase lock circuitry to obtain the zero crossing of a phase electrical network ea, DSP calculates grid cycle in real time according to the zero crossing of a phase electrical network ea, and change control cycle with this, calculate three-phase input line voltage value (ea, eb, ec) according to the zero crossing of a phase electrical network ea simultaneously; B () utilizes the current Hall transducer input current value (ia, ib, ic) of sampling three-phase reactor, the DC voltage value U* at employing point platen press sampling three-phase voltage type PWM rectification module DC bus capacitor C0 two ends respectively, and be converted to 0 ~ 3V voltage by conditioning discharge circuit; C () DSP control circuit carries out controlling calculation according to sampled value ((a) and (b) obtains), concrete control method can adopt conventional feed forward decoupling control, predictive current control, fuzzy control to realize unity power factor control; Under described several mode of operation and different power stage ranks, three-phase voltage type PWM rectification module can adopt same control method, does not need independent adjustment, simple.
Texas Instruments 2000 series can be selected as preferred described DSP.
Fig. 2 a ~ Fig. 2 c is the design sketch of matlab simulation data voltage U * (three-phase voltage type PWM rectification module DC side output voltage), Uo when being operated in pattern () (when the uncontrollable rectifier bridge module group of three-phase is in parallel DC side output voltage) and input voltage ea (electrical network a phase voltage), input current ia (exchange and input a phase current) respectively.
Fig. 3 a ~ Fig. 3 c is the design sketch of matlab simulation data voltage U * (three-phase voltage type PWM rectification module DC side output voltage), Uo when being operated in pattern (two) (when the uncontrollable rectifier bridge module group of three-phase is in parallel DC side output voltage) and input voltage ea (electrical network a phase voltage), input current ia (AC a phase input current) respectively.
Fig. 4 a ~ Fig. 4 c is matlab simulation data voltage U * (three-phase voltage type PWM rectification module DC side output voltage), U when being operated in pattern (three) respectively
oNthe design sketch of (N unit three-phase uncontrollable rectifier bridge module DC side output voltage separately) and input voltage ea (electrical network a phase voltage), input current ia (AC a phase input current).
Fig. 5 a ~ Fig. 5 c is matlab simulation data voltage U * (three-phase voltage type PWM rectification module DC side output voltage), U when being operated in pattern (four) respectively
oNthe design sketch of (N unit three-phase uncontrollable rectifier bridge module DC side output voltage separately) and input voltage ea (electrical network a phase voltage), input current ia (AC a phase input current).
Visible, three-phase controlled rectification follows three-phase uncontrollable rectifier module output voltage waveforms consistent and ripple is all very little; Current on line side has followed the tracks of voltage on line side all well simultaneously, and both phase places are identical, and is all sinusoidal wave.
Those skilled in the art can make various amendment to this specific embodiment or supplement or adopt similar mode to substitute under the prerequisite without prejudice to principle of the present utility model and essence, but these changes all fall into protection range of the present utility model.Therefore the utility model technical scope is not limited to above-described embodiment.
Claims (2)
1., based on the mixing transformation system of three-phase PWM rectification and multiple unit uncontrollable rectifier, it is characterized in that comprising: three-phase reactor (L), three-phase voltage type PWM rectification circuit, the uncontrollable rectifier bridge module group of three-phase, electric capacity (C0 ~ CN), DSP control circuit; Described three-phase reactor one end is connected with three phase network, the other end (A, B, C) of three-phase reactor is connected with the mid point of three-phase voltage type PWM rectification module brachium pontis and the mid point of each three-phase uncontrollable rectifier bridge module brachium pontis respectively, and namely the input of three-phase voltage type PWM rectification module and the uncontrollable rectifier bridge module of each three-phase is connected in parallel; Described three-phase voltage type PWM rectification module adopts six Switch Three-Phase half bridge circuit topologys; In described three-phase uncontrollable rectifier bridge module group, each three-phase uncontrollable rectifier bridge module forms by three-phase diode rectifier bridge; The DC voltage that DSP control circuit controls three-phase voltage type PWM rectification module and the uncontrollable rectifier bridge module group of three-phase exports and net side power factor.
2. the mixing transformation system based on three-phase PWM rectification and multiple unit uncontrollable rectifier according to claim 1, is characterized in that the DSP in described DSP control circuit selects Texas Instruments 2000 series.
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| CN201520277449.2U CN204761317U (en) | 2015-04-30 | 2015-04-30 | Mix conversion systems based on rectification is not controlled with polycell to rectification of three -phase PWM |
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| CN201520277449.2U CN204761317U (en) | 2015-04-30 | 2015-04-30 | Mix conversion systems based on rectification is not controlled with polycell to rectification of three -phase PWM |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836463A (en) * | 2015-04-30 | 2015-08-12 | 华南理工大学 | Mixing transformation system based on three-phase PWM rectification and multi-unit uncontrolled rectification |
| CN107346948A (en) * | 2017-08-29 | 2017-11-14 | 华北科技学院 | A kind of efficiently two-way mixing three-phase voltage type rectifier control method |
| CN110212790A (en) * | 2019-06-11 | 2019-09-06 | 湖南科瑞变流电气股份有限公司 | A kind of mixing high power rectification system using diode unit and thyristor unit |
| CN114362568A (en) * | 2020-09-29 | 2022-04-15 | 上海绿巨人爱爵能源科技有限公司 | Rectifying system for grid-connected water electrolysis hydrogen production |
-
2015
- 2015-04-30 CN CN201520277449.2U patent/CN204761317U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104836463A (en) * | 2015-04-30 | 2015-08-12 | 华南理工大学 | Mixing transformation system based on three-phase PWM rectification and multi-unit uncontrolled rectification |
| CN104836463B (en) * | 2015-04-30 | 2018-01-05 | 华南理工大学 | Mixing transformation system based on three-phase PWM rectification Yu multiple-unit uncontrollable rectifier |
| CN107346948A (en) * | 2017-08-29 | 2017-11-14 | 华北科技学院 | A kind of efficiently two-way mixing three-phase voltage type rectifier control method |
| CN110212790A (en) * | 2019-06-11 | 2019-09-06 | 湖南科瑞变流电气股份有限公司 | A kind of mixing high power rectification system using diode unit and thyristor unit |
| CN114362568A (en) * | 2020-09-29 | 2022-04-15 | 上海绿巨人爱爵能源科技有限公司 | Rectifying system for grid-connected water electrolysis hydrogen production |
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