CN103840684A - High-power compensation type cascade diode H-bridge unit power factor rectifier - Google Patents
High-power compensation type cascade diode H-bridge unit power factor rectifier Download PDFInfo
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- CN103840684A CN103840684A CN201410090383.6A CN201410090383A CN103840684A CN 103840684 A CN103840684 A CN 103840684A CN 201410090383 A CN201410090383 A CN 201410090383A CN 103840684 A CN103840684 A CN 103840684A
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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
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Abstract
The invention provides a high-power compensation type cascade diode H-bridge unit power factor rectifier which comprises various main power circuits which are formed by cascading a plurality of module units in a three-phase star connection, angle connection or double-star connection mode. Meanwhile, the invention further provides a small-capacity compensation device formed through serial connection or parallel connection or series-parallel connection, and unit power factor rectification can be easily achieved. The rectifier has the advantages that a low-voltage power switch tube can be used for large-power rectification conversion under high voltage, a power-frequency phase-shifting transformer which is large, heavy and complex in wiring does not need to be used, the topological structures of the main power circuits are simplified, the number of switching devices which are used is greatly reduced, loss of the circuits in work is reduced, work efficiency of a system is improved, the size is small, the weight is low and cost is low. Meanwhile, the power factor of the rectifier always keeps to be 1 on the situation that a load is changed. The rectifier has important application value in the application field such as high-voltage direct current transmission, high-power electric and electronic transformers, high-power medium-and-high-voltage AC-DC-AC converters.
Description
Technical field
The present invention relates to rectifier, particularly high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based.
Background technology
Along with science and technology and the fast development of the modernization of industry and the requirement to energy savings, the mesohigh electronic power convertor that is applied to large-power occasions plays a part more and more important.In recent years, the application that many level power current transformer (Multilevel Converter) has been succeeded in fields such as high-tension high-power frequency control, active electric filter device, high voltage direct current (HVDC) transmission system and power system reactive power compensations.The basic circuit topological structure of many level current transformers mainly contains diode clamp formula, flying capacitor type and 3 kinds of circuit of cascade of power units formula.Wherein, the many level current transformers of cascade of power units formula because of its modularized design, the advantage such as reliability is high, harmonic pollution is little, input-output power wide ranges becomes the market mainstream.But the major defect that traditional many level power of cascade of power units formula current transformer exists is the Industrial Frequency Transformer that need to apply bulky wiring complexity at power input, this is restricted its application in many industrial occasions.Thereby, cancel the Industrial Frequency Transformer in many level current transformers of conventional power unit cascade circuit, design the Cascaded multi-level converter circuit of no industrial frequency transformer, bring revolutionary change will to these type of many level current transformers.Research in this direction is the focus that power electronics and power drives area research personnel pay close attention in recent years always, is one of current important subject of electric and electronic technical field.
Publicity patent of invention " high-power tandem type diode H bridge Unity Power Factor PWM Rectifier Based " (CN201310177775.1, CN103269171A) a kind of scheme that forms high-power cascade rectifier using single-phase H bridge diode rectifier+Boost circuit as elementary cell cascade has been proposed, this scheme is applied certain control algolithm can make each module output voltage in the time that load is unequal, keep balance, input current waveform approaches sinusoidal, input current and input voltage phase are consistent, and realize unit power factor rectifier.But due to after the input inductance of this scheme is positioned at diode rectification, in switching process, under certain operating mode, the electric current in certain or certain multiple inductance can form circulation through switching tube and corresponding diode rectifier bridge, making these diode rectifier bridge AC voltages is zero, thereby cause diode rectifier bridge in other modules of cascade to bear whole supply voltages, this has just lost the meaning that reduces diode withstand voltage by cascade diode.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, the high-power offset-type cascade diode of the first H bridge Unity Power Factor PWM Rectifier Based is provided, this current transformer is put into inductance the input of diode rectifier bridge, thereby fundamentally eliminate the possibility of the electric current in inductance through switching tube and corresponding diode rectifier bridge formation circulation, by suitable control method, make the each module output voltage of cascade reach balanced, make input current approach sinusoidal waveform, and by increasing compared with the series compensation of low capacity at rectifier input, or shunt compensation, or series and parallel, make input voltage and input current keep same-phase, realize unit power factor rectifier.This current transformer is without using power frequency phase shifting transformer, and operating efficiency is high, and volume is little, lightweight, and cost is low, uses low withstand voltage power switch pipe to complete the power rectifier conversion under high voltage by the mode of cascade.
For achieving the above object, the high-power offset-type cascade diode of one provided by the invention H bridge Unity Power Factor PWM Rectifier Based, comprise main power circuit, described main power circuit comprises input inductance, single-phase diode rectifier bridge and N the first modular unit, wherein N is positive integer, described the first modular unit comprises switching device, fast recovery diode, output DC capacitor and load, the first terminals of the second terminals of switching device in N described the first modular unit and the switching device in described first modular unit of the next one of institute's cascade are connected successively, remaining two free ends after described the first modular unit cascade, be that the first terminals of the switching device in first first modular unit and the direct current positive output end of single-phase diode rectifier bridge are connected, the second terminals of switching device and the direct current negative output terminal of single-phase diode rectifier bridge in N the first modular unit are connected, form the second modular unit, described main power circuit also comprises single-phase series compensating module unit, described single-phase series compensating module unit comprises Monophase electric power electronic inverter, LC filter and transformer, wherein, the series connection of LC filter is between the secondary side and Monophase electric power electronic inverter of transformer, the primary side of described transformer is connected and is accessed AC network with input inductance and the second modular unit.
A kind of high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said single-phase series compensating module unit replaces with parallel single-phase compensating module unit, described parallel single-phase compensating module unit comprises another Monophase electric power electronic inverter, another filter inductance and another transformer, wherein, another filter inductance series connection is between the secondary side and Monophase electric power electronic inverter of another transformer, and primary side and the AC network of described another transformer are connected in parallel.
A kind of high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said main power circuit also comprises parallel single-phase compensating module unit and electric capacity, described parallel single-phase compensating module unit comprises another Monophase electric power electronic inverter, another filter inductance and another transformer, wherein, another filter inductance series connection is between the secondary side and Monophase electric power electronic inverter of another transformer, described Capacitance parallel connection is received between described Monophase electric power electronic inverter and described another Monophase electric power electronic inverter, primary side and the AC network of described another transformer are connected in parallel.
For achieving the above object, the high-power offset-type cascade diode of another kind provided by the invention H bridge Unity Power Factor PWM Rectifier Based, comprise main power circuit, described main power circuit comprises input inductance, single-phase diode rectifier bridge and several first modular units, wherein N is positive integer, described the first modular unit comprises switching device, fast recovery diode, output DC capacitor and load, the first terminals of the second terminals of switching device in N described the first modular unit and the switching device in described first modular unit of the next one of institute's cascade are connected successively, remaining two free ends after described the first modular unit cascade, be that the first terminals of the switching device in first first modular unit and the direct current positive output end of single-phase diode rectifier bridge are connected, the second terminals of switching device and the direct current negative output terminal of single-phase diode rectifier bridge in N the first modular unit are connected, form described the second modular unit, an ac input end of the each described single-phase diode rectifier bridge in M described the second modular unit is connected successively with another ac input end of the described single-phase diode rectifier bridge of the next one, after described the second modular unit cascade, remain two free ends, be another ac input end of first single-phase diode rectifier bridge and an ac input end of M single-phase diode rectifier bridge, described second modular unit of cascade forms the 3rd modular unit, wherein M is positive integer, described main power circuit also comprises single-phase series compensating module unit, described single-phase series compensating module unit comprises Monophase electric power electronic inverter, LC filter and transformer, wherein, the series connection of LC filter is between the secondary side and Monophase electric power electronic inverter of transformer, the primary side of described transformer is connected and is accessed AC network with input inductance and the 3rd modular unit.
The another kind of high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said single-phase series compensating module unit replaces with parallel single-phase compensating module unit, described parallel single-phase compensating module unit comprises another Monophase electric power electronic inverter, another filter inductance and another transformer, wherein, another filter inductance series connection is between the secondary side and Monophase electric power electronic inverter of another transformer, and primary side and the AC network of described another transformer are connected in parallel.
The another kind of high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said main power circuit also comprises parallel single-phase compensating module unit and electric capacity, described parallel single-phase compensating module unit comprises another Monophase electric power electronic inverter, another filter inductance and another transformer, wherein, another filter inductance series connection is between the secondary side and Monophase electric power electronic inverter of another transformer, described Capacitance parallel connection is received between described Monophase electric power electronic inverter and described another Monophase electric power electronic inverter, primary side and the AC network of described another transformer are connected in parallel.
For achieving the above object, the third high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based provided by the invention, comprise three-phase main power circuit, described three-phase main power circuit comprises 3 input inductance and 3 the 3rd modular units that are made up of respectively several first modular units, 3 input inductance and 3 the 3rd modular units form Y-connection, wherein, described the first modular unit comprises switching device, fast recovery diode, output DC capacitor and load, the first terminals of the switching device in described first modular unit of the next one of the second terminals of the switching device in each described the first modular unit and institute's cascade are connected successively, remaining two free ends after described the first modular unit cascade, be that the first terminals of the switching device in first first modular unit and the direct current positive output end of single-phase diode rectifier bridge are connected, the second terminals of switching device and the direct current negative output terminal of single-phase diode rectifier bridge in N the first modular unit are connected, form described the second modular unit, an ac input end of the each described single-phase diode rectifier bridge in M described the second modular unit is connected successively with another ac input end of the described single-phase diode rectifier bridge of the next one, after described the second modular unit cascade, remain two free ends, be another ac input end of first single-phase diode rectifier bridge and an ac input end of M single-phase diode rectifier bridge, described second modular unit of cascade forms the 3rd modular unit, and wherein M is positive integer, described three-phase main power circuit also comprises three-phase series compensating module unit, described three-phase series compensating module unit comprises three-phase power electronic inverter, 3 LC filters and 3 transformers, wherein, each LC filter respectively series connection between the secondary side and three-phase power electronic inverter of each transformer, the primary side of each described transformer connect with 1 input inductance respectively access three-phase alternating current net each mutually in.
The third high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said 3 input inductance and 3 the 3rd modular units are replaced and are formed Angle connection.
The third high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said three-phase main power circuit is replaced and is comprised 3 input inductance, 6 brachium pontis inductance, 6 the 3rd modular unit and DC capacitors, and described 3 input inductance, 6 brachium pontis inductance, 6 the 3rd modular units form double star with DC capacitor and are connected.
The third high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said three-phase series compensating module unit replaces with parallel three phase compensating module unit, described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances and other 3 transformers, wherein, the series connection of each filter inductance difference is between the secondary side and three-phase power electronic inverter of each transformer, a Same Name of Ends of each described other transformer primary side interconnects, another Same Name of Ends of each described other transformer primary side interconnects mutually with each of three-phase alternating current electrical network respectively.
The third high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said three-phase series compensating module unit replaces with parallel three phase compensating module unit, described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances and other 3 transformers, wherein, the series connection of each filter inductance difference is between the secondary side and three-phase power electronic inverter of each transformer, a Same Name of Ends of each described other transformer primary side interconnects, another Same Name of Ends of each described other transformer primary side interconnects mutually with each of three-phase alternating current electrical network respectively.
The third high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said three-phase series compensating module unit replaces with parallel three phase compensating module unit, described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances and other 3 transformers, wherein, the series connection of each filter inductance difference is between the secondary side and three-phase power electronic inverter of each transformer, a Same Name of Ends of each described other transformer primary side interconnects, another Same Name of Ends of each described other transformer primary side interconnects mutually with each of three-phase alternating current electrical network respectively.
The third high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said three-phase main power circuit also comprises parallel three phase compensating module unit and electric capacity, described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances and other 3 transformers, wherein, the series connection of each filter inductance difference is between the secondary side and three-phase power electronic inverter of each transformer, a Same Name of Ends of each described other transformer primary side interconnects, another Same Name of Ends of each described other transformer primary side interconnects mutually with each of three-phase alternating current electrical network respectively, described Capacitance parallel connection is received between described three-phase power electronic inverter and described another three-phase power electronic inverter.
The third high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said three-phase main power circuit also comprises parallel three phase compensating module unit and electric capacity, described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances and other 3 transformers, wherein, the series connection of each filter inductance difference is between the secondary side and three-phase power electronic inverter of each transformer, a Same Name of Ends of each described other transformer primary side interconnects, another Same Name of Ends of each described other transformer primary side interconnects mutually with each of three-phase alternating current electrical network respectively, described Capacitance parallel connection is received between described three-phase power electronic inverter and described another three-phase power electronic inverter.
The third high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention, wherein said three-phase main power circuit also comprises parallel three phase compensating module unit and electric capacity, described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances and other 3 transformers, wherein, the series connection of each filter inductance difference is between the secondary side and three-phase power electronic inverter of each transformer, a Same Name of Ends of each described other transformer primary side interconnects, another Same Name of Ends of each described other transformer primary side interconnects mutually with each of three-phase alternating current electrical network respectively, described Capacitance parallel connection is received between described three-phase power electronic inverter and described another three-phase power electronic inverter.
Advantage and the good effect of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based are: owing to having adopted several modular unit cascade compositions, therefore can use low withstand voltage power switch pipe to complete the power rectifier conversion under high voltage, and do not need to use huge, heavy, the power frequency phase shifting transformer of wiring complexity, simplify the topological structure of main power circuit, greatly reduce the use of active switch device, and then reduce the loss in circuit working, improve the operating efficiency of system, and by adopting compared with the series and parallel unit of low capacity, solve that this kind of rectifier power factor increases the weight of with load and the problem that reduces.This kind of rectifier volume is little, lightweight, and cost is low, and power factor is high, and harmonic wave is little.This current transformer is at HVDC Transmission, high-power electric and electronic transformer, and the applications such as high-power mesohigh ac-dc-ac frequency converter have important using value.
Be elaborated with reference to accompanying drawing below in conjunction with embodiment.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the first modular unit in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Fig. 2 is the circuit diagram of single-phase series compensating unit in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Fig. 3 is the circuit diagram of parallel single-phase compensating unit in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Fig. 4 is the circuit topological structure figure of the first embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Fig. 5 is the circuit topological structure figure of the second embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Fig. 6 is the circuit topological structure figure of the 3rd embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Fig. 7 is the circuit diagram of the second modular unit in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Fig. 8 is the circuit topological structure figure of the 4th embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Fig. 9 is the circuit topological structure figure of the 5th embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 10 is the circuit topological structure figure of the 6th embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 11 is the circuit diagram of the 3rd modular unit in the high-power tandem type diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 12 is the circuit diagram of three-phase series compensating unit in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 13 is the circuit diagram of parallel three phase compensating unit in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 14 is the circuit topological structure figure of the 7th embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 15 is the circuit topological structure figure of the 8th embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 16 is the circuit topological structure figure of the 9th embodiment in offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention;
Figure 17 is the circuit topological structure figure of the tenth embodiment in offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based of the present invention;
Figure 18 is the circuit topological structure figure of the 11 embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 19 is the circuit topological structure figure of the 12 embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 20 is the circuit topological structure figure of the 13 embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 21 is the circuit topological structure figure of the 14 embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based;
Figure 22 is the circuit topological structure figure of the 15 embodiment in the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based.
Embodiment
The voltage rating of considering diode can not be very high, when for high voltage occasion more, just still needs to adopt the mode of diode rectifier bridge cascade.For this reason, in the embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, cascade diode H bridge Unity Power Factor PWM Rectifier Based is the circuit topology being formed a whole by several modular unit cascades.
With reference to Fig. 1, Fig. 2 and Fig. 4, in the first embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, main power circuit comprises single-phase series compensating module unit, input inductance L, single-phase diode rectifier bridge and N the first modular unit A, and wherein N is positive integer.
The first modular unit A comprises switching device, fast recovery diode, output DC capacitor and load.The first terminals c of the second terminals d of switching device in N the first modular unit A and the switching device in the next one first modular unit A of institute's cascade is connected successively, remaining two free ends after the first modular unit A cascade, the the first terminals c that is the switching device in first first modular unit A is connected with the direct current positive output end of single-phase diode rectifier bridge, the second terminals d of the switching device in N the first modular unit A is connected with the direct current negative output terminal of single-phase diode rectifier bridge, forms the second modular unit B.
Single-phase series compensating module unit comprises Monophase electric power electronic inverter, LC filter L1C1 and transformer T1.Wherein, LC filter L1C1 series connection is between the secondary side and Monophase electric power electronic inverter of transformer T1, and the primary side of transformer T1 is connected and accessed AC network with input inductance L and the second modular unit B.
With reference to Fig. 1, Fig. 3 and Fig. 5, in the second embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, the single-phase series compensating module unit in embodiment mono-replaces with parallel single-phase compensating module unit.Parallel single-phase compensating module unit comprises another Monophase electric power electronic inverter, another filter inductance L2 and another transformer T2, wherein, another filter inductance L2 series connection is between the secondary side and Monophase electric power electronic inverter of another transformer T2, and primary side and the AC network of another transformer T2 are connected in parallel.
With reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 6, in the 3rd embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, the main power circuit in embodiment mono-also comprises parallel single-phase compensating module unit and capacitor C 2.Capacitor C 2 and be connected to Monophase electric power electronic inverter and another Monophase electric power electronic inverter between.Primary side and the AC network of another transformer T2 in parallel single-phase compensating module unit are connected in parallel.
With reference to Fig. 2, Fig. 7 and Fig. 8, in the 4th embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, main power circuit comprises single-phase series compensating module unit, input inductance L, single-phase diode rectifier bridge and several first modular units A, and wherein N is positive integer.
N the first modular unit A cascade forms described the second modular unit B.An ac input end b of the each single-phase diode rectifier bridge in M the second modular unit B is connected successively with another ac input end a of next single-phase diode rectifier bridge, after the second modular unit B cascade, remain two free ends, be another ac input end a of first single-phase diode rectifier bridge and an ac input end b of M single-phase diode rectifier bridge, the second modular unit B of cascade forms the 3rd modular unit C, and wherein M is positive integer.
The primary side of transformer T1 in single-phase series compensating module unit is connected and is accessed AC network with input inductance L and the 3rd modular unit C.
With reference to Fig. 3, Fig. 7 and Fig. 9, in the 5th embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, single-phase series compensating module unit in embodiment tetra-replaces with parallel single-phase compensating module unit, and primary side and the AC network of another transformer T2 in parallel single-phase compensating module unit are connected in parallel.
With reference to Fig. 2, Fig. 3, Fig. 7 and Figure 10, in the 6th embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, the main power circuit in embodiment tetra-also comprises parallel single-phase compensating module unit and capacitor C 2.Capacitor C 2 and be connected to Monophase electric power electronic inverter and another Monophase electric power electronic inverter between.Primary side and the AC network of another transformer T2 in parallel single-phase compensating module unit are connected in parallel.
With reference to Figure 11, Figure 12 and Figure 14, in the 7th embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, comprise three-phase main power circuit, three-phase main power circuit comprises three-phase series compensating module unit, 3 input inductance L 101-L103 and 3 the 3rd modular unit C that are made up of respectively several first modular units A, and 3 input inductance L 101-L103 and 3 the 3rd modular unit C form Y-connection.
Wherein, the first modular unit A comprises switching device, fast recovery diode, output DC capacitor and load.The first terminals c of the second terminals d of switching device in N the first modular unit A and the switching device in the next one first modular unit A of institute's cascade is connected successively, remaining two free ends after the first modular unit A cascade, the the first terminals c that is the switching device in first first modular unit A is connected with the direct current positive output end of single-phase diode rectifier bridge, the second terminals d of the switching device in N the first modular unit A is connected with the direct current negative output terminal of single-phase diode rectifier bridge, forms the second modular unit B.
An ac input end b of the each single-phase diode rectifier bridge in M the second modular unit B is connected successively with another ac input end a of next single-phase diode rectifier bridge, after the second modular unit B cascade, remain two free ends, be another ac input end a of first single-phase diode rectifier bridge and an ac input end b of M single-phase diode rectifier bridge, the second modular unit B of cascade forms the 3rd modular unit C, and wherein M is positive integer.
Three-phase series compensating module unit comprises three-phase power electronic inverter, 3 LC filter L11C11-L13C13 and 3 transformer T11-T13.Wherein, each LC filter L11C11-L13C13 respectively series connection between the secondary side and three-phase power electronic inverter of each transformer T11 or T12 or T13, the primary side of each described transformer T11-T13 connect with 1 input inductance L 101 or L102 or L103 respectively access three-phase alternating current net each mutually in.
With reference to Figure 11, Figure 12 and Figure 15, in the 8th embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, 3 input inductance L 101-L103 in embodiment seven and 3 the 3rd modular unit C replace and form Angle connection.
With reference to Figure 11, Figure 12 and Figure 16, in the 9th embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, three-phase main power circuit in embodiment seven is replaced and is comprised 3 input inductance L 101-L103,6 brachium pontis inductance L 104-L109,6 the 3rd modular unit C and DC capacitor C101, and 3 input inductance L 101-L103,6 brachium pontis inductance L 104-L109,6 the 3rd modular unit C form double star with DC capacitor C101 and are connected.
With reference to Figure 11, Figure 13 and Figure 17, in the tenth embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, the three-phase series compensating module unit in embodiment seven replaces with parallel three phase compensating module unit.
Parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductance L21-L23 and other 3 transformer T21-T23, wherein, the series connection of each filter inductance L21-L23 difference is between the secondary side and three-phase power electronic inverter of each transformer T21-T23, a Same Name of Ends of each described other transformer T21-T23 primary side interconnects, and another Same Name of Ends of each described other transformer T21-T23 primary side interconnects mutually with each of three-phase alternating current electrical network respectively.
With reference to Figure 11, Figure 13 and Figure 18, in the 11 embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, the three-phase series compensating module unit in embodiment eight replaces with parallel three phase compensating module unit.
With reference to Figure 11, Figure 13 and Figure 19, in the 12 embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, the three-phase series compensating module unit in embodiment nine replaces with parallel three phase compensating module unit.
With reference to Figure 11, Figure 12, Figure 13 and Figure 20, in the 13 embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, the three-phase main power circuit in embodiment seven also comprises parallel three phase compensating module unit and capacitor C 30.Capacitor C 30 and be connected to three-phase power electronic inverter and another three-phase power electronic inverter between.
With reference to Figure 11, Figure 12, Figure 13 and Figure 21, in the 14 embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, the three-phase main power circuit in embodiment eight also comprises parallel three phase compensating module unit and capacitor C 30.Capacitor C 30 and be connected to three-phase power electronic inverter and another three-phase power electronic inverter between.
With reference to Figure 11, Figure 12, Figure 13 and Figure 22, in the 15 embodiment of the high-power offset-type cascade diode of the present invention H bridge Unity Power Factor PWM Rectifier Based, the three-phase main power circuit in embodiment nine also comprises parallel three phase compensating module unit and capacitor C 30.Capacitor C 30 and be connected to three-phase power electronic inverter and another three-phase power electronic inverter between.
The new diode H bridge cascade rectifier circuit topology of the present invention's proposition is with the difference of publicity patent of invention " high-power tandem type diode H bridge Unity Power Factor PWM Rectifier Based ": patent of the present invention is put into inductance the input of diode rectifier bridge, has so just fundamentally eliminated the possibility of the electric current in inductance through switching tube and corresponding diode rectifier bridge formation circulation.By suitable control method, make the each module output voltage of cascade reach balanced, make input current approach sinusoidal waveform simultaneously.Have a phase difference changing with load because sort circuit makes input voltage and electric current in essence, also cannot realize unit power factor rectifier.For this reason, the present invention increases compared with the series compensation of low capacity at rectifier input, or shunt compensation, or series and parallel, so just can realize easily unit power factor rectifier, its circuit topology circuit structure is simple, and cost is low, easily realize, in the industrial occasions of energy one direction transmission, there is important using value and good application prospect.
Embodiment recited above is described the preferred embodiment of the present invention; not the spirit and scope of the present invention are limited; do not departing under design prerequisite of the present invention; various modification and improvement that in this area, engineers and technicians make technical scheme of the present invention; all should fall into protection scope of the present invention; the technology contents of request protection of the present invention, has all been documented in claims.
Claims (15)
1. a high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based, comprise main power circuit, described main power circuit comprises input inductance (L), single-phase diode rectifier bridge and N the first modular unit (A), wherein N is positive integer, described the first modular unit (A) comprises switching device, fast recovery diode, output DC capacitor and load, first terminals (c) of second terminals (d) of switching device in N described the first modular unit (A) and the switching device in described first modular unit of the next one (A) of institute's cascade are connected successively, remaining two free ends after described the first modular unit (A) cascade, the first terminals (c) that are the switching device in first first modular unit (A) are connected with the direct current positive output end of single-phase diode rectifier bridge, second terminals (d) of the switching device in N the first modular unit (A) are connected with the direct current negative output terminal of single-phase diode rectifier bridge, form the second modular unit (B), it is characterized in that: described main power circuit also comprises single-phase series compensating module unit, described single-phase series compensating module unit comprises Monophase electric power electronic inverter, LC filter (L1, and transformer (T1) C1), wherein, LC filter (L1, C1) series connection is between the secondary side and Monophase electric power electronic inverter of transformer (T1), the primary side of described transformer (T1) is connected and is accessed AC network with input inductance (L) and the second modular unit (B).
2. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 1, it is characterized in that: wherein said single-phase series compensating module unit replaces with parallel single-phase compensating module unit, described parallel single-phase compensating module unit comprises another Monophase electric power electronic inverter, another filter inductance (L2) and another transformer (T2), wherein, another filter inductance (L2) series connection is between the secondary side and Monophase electric power electronic inverter of another transformer (T2), primary side and the AC network of described another transformer (T2) are connected in parallel.
3. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 1, it is characterized in that: wherein said main power circuit also comprises parallel single-phase compensating module unit and electric capacity (C2), described parallel single-phase compensating module unit comprises another Monophase electric power electronic inverter, another filter inductance (L2) and another transformer (T2), wherein, another filter inductance (L2) series connection is between the secondary side and Monophase electric power electronic inverter of another transformer (T2), described electric capacity (C2) and be connected to described Monophase electric power electronic inverter and described another Monophase electric power electronic inverter between, primary side and the AC network of described another transformer (T2) are connected in parallel.
4. another kind of high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based, comprise main power circuit, described main power circuit comprises input inductance (L), single-phase diode rectifier bridge and several first modular units (A), wherein N is positive integer, described the first modular unit (A) comprises switching device, fast recovery diode, output DC capacitor and load, first terminals (c) of second terminals (d) of switching device in N described the first modular unit (A) and the switching device in described first modular unit of the next one (A) of institute's cascade are connected successively, remaining two free ends after described the first modular unit (A) cascade, the first terminals (c) that are the switching device in first first modular unit (A) are connected with the direct current positive output end of single-phase diode rectifier bridge, second terminals (d) of the switching device in N the first modular unit (A) are connected with the direct current negative output terminal of single-phase diode rectifier bridge, form described the second modular unit (B), an ac input end (b) of each described single-phase diode rectifier bridge and another ac input end (a) of next described single-phase diode rectifier bridge in M described the second modular unit (B) are connected successively, after described the second modular unit (B) cascade, remain two free ends, be another ac input end (a) of first single-phase diode rectifier bridge and an ac input end (b) of M single-phase diode rectifier bridge, described second modular unit (B) of cascade forms the 3rd modular unit (C), wherein M is positive integer, it is characterized in that: described main power circuit also comprises single-phase series compensating module unit, described single-phase series compensating module unit comprises Monophase electric power electronic inverter, LC filter (L1, and transformer (T1) C1), wherein, LC filter (L1, C1) series connection is between the secondary side and Monophase electric power electronic inverter of transformer (T1), the primary side of described transformer (T1) is connected and is accessed AC network with input inductance (L) and the 3rd modular unit (C).
5. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 4, it is characterized in that: wherein said single-phase series compensating module unit replaces with parallel single-phase compensating module unit, described parallel single-phase compensating module unit comprises another Monophase electric power electronic inverter, another filter inductance (L2) and another transformer (T2), wherein, another filter inductance (L2) series connection is between the secondary side and Monophase electric power electronic inverter of another transformer (T2), primary side and the AC network of described another transformer (T2) are connected in parallel.
6. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 4, it is characterized in that: wherein said main power circuit also comprises parallel single-phase compensating module unit and electric capacity (C2), described parallel single-phase compensating module unit comprises another Monophase electric power electronic inverter, another filter inductance (L2) and another transformer (T2), wherein, another filter inductance (L2) series connection is between the secondary side and Monophase electric power electronic inverter of another transformer (T2), described electric capacity (C2) and be connected to described Monophase electric power electronic inverter and described another Monophase electric power electronic inverter between, primary side and the AC network of described another transformer (T2) are connected in parallel.
7. the third high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based, comprise three-phase main power circuit, described three-phase main power circuit comprises 3 input inductance and 3 the 3rd modular units (C) that are made up of respectively several first modular units (A), 3 input inductance (L101-L103) and 3 the 3rd modular units (C) form Y-connection, wherein, described the first modular unit (A) comprises switching device, fast recovery diode, output DC capacitor and load, first terminals (c) of the switching device in described first modular unit of the next one (A) of second terminals (d) of the switching device in each described the first modular unit (A) and institute's cascade are connected successively, remaining two free ends after described the first modular unit (A) cascade, be that the first terminals of switching device and the direct current positive output end of single-phase diode rectifier bridge in first first modular unit (A) is connected, the second terminals of switching device and the direct current negative output terminal of single-phase diode rectifier bridge in N the first modular unit (A) are connected, form described the second modular unit (B), an ac input end (b) of each described single-phase diode rectifier bridge and another ac input end (a) of next described single-phase diode rectifier bridge in M described the second modular unit (B) are connected successively, after described the second modular unit (B) cascade, remain two free ends, be another ac input end (a) of first single-phase diode rectifier bridge and an ac input end (b) of M single-phase diode rectifier bridge, described second modular unit (B) of cascade forms the 3rd modular unit (C), wherein M is positive integer, it is characterized in that: described three-phase main power circuit also comprises three-phase series compensating module unit, described three-phase series compensating module unit comprises three-phase power electronic inverter, 3 LC filters (L11C11-L13C13) and 3 transformers (T11-T13), wherein, the series connection of each LC filter (L11C11-L13C13) difference is between the secondary side and three-phase power electronic inverter of each transformer (T11 or T12 or T13), the primary side of each described transformer (T11-T13) connect with 1 input inductance (L101 or L102 or L103) respectively access three-phase alternating current net each mutually in.
8. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 7, is characterized in that: wherein said 3 input inductance (L101-L103) and 3 the 3rd modular units (C) are replaced and formed Angle connection.
9. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 7, it is characterized in that: wherein said three-phase main power circuit is replaced and comprised 3 input inductance (L101-L103), 6 brachium pontis inductance (L104-L109), 6 the 3rd modular units (C) and DC capacitors (C30), described 3 input inductance (L101-L103), 6 brachium pontis inductance (L104-L109), 6 the 3rd modular units (C) form double star with DC capacitor (C30) and are connected.
10. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 7, it is characterized in that: wherein said three-phase series compensating module unit replaces with parallel three phase compensating module unit, described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances (L21-L23) and other 3 transformers (T21-T23), wherein, the series connection of each filter inductance (L21-L23) difference is between the secondary side and three-phase power electronic inverter of each other transformer (T21-T23), a Same Name of Ends of each described other transformer (T21-T23) primary side interconnects, another Same Name of Ends of each described other transformer (T21-T23) primary side interconnects mutually with each of three-phase alternating current electrical network respectively.
11. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 8, it is characterized in that: wherein said three-phase series compensating module unit replaces with parallel three phase compensating module unit, described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances (L21-L23) and other 3 transformers (T21-T23), wherein, the series connection of each filter inductance (L21-L23) difference is between the secondary side and three-phase power electronic inverter of each other transformer (T21-T23), a Same Name of Ends of each described other transformer (T21-T23) primary side interconnects, another Same Name of Ends of each described other transformer (T21-T23) primary side interconnects mutually with each of three-phase alternating current electrical network respectively.
12. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 9, it is characterized in that: wherein said three-phase series compensating module unit replaces with parallel three phase compensating module unit, described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances (L21-L23) and other 3 transformers (T21-T23), wherein, the series connection of each filter inductance (L21-L23) difference is between the secondary side and three-phase power electronic inverter of each other transformer (T21-T23), a Same Name of Ends of each described other transformer (T21-T23) primary side interconnects, another Same Name of Ends of each described other transformer (T21-T23) primary side interconnects mutually with each of three-phase alternating current electrical network respectively.
13. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 7, it is characterized in that: wherein said three-phase main power circuit also comprises parallel three phase compensating module unit and electric capacity (C30), described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances (L21-L23) and other 3 transformers (T21-T23), wherein, the series connection of each filter inductance (L21-L23) difference is between the secondary side and three-phase power electronic inverter of each other transformer (T21-T23), a Same Name of Ends of each described other transformer (T21-T23) primary side interconnects, another Same Name of Ends of each described other transformer (T21-T23) primary side interconnects mutually with each of three-phase alternating current electrical network respectively, described electric capacity (C30) and be connected to described three-phase power electronic inverter and described another three-phase power electronic inverter between.
14. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 8, it is characterized in that: wherein said three-phase main power circuit also comprises parallel three phase compensating module unit and electric capacity (C30), described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances (L21-L23) and other 3 transformers (T21-T23), wherein, the series connection of each filter inductance (L21-L23) difference is between the secondary side and three-phase power electronic inverter of each other transformer (T21-T23), a Same Name of Ends of each described other transformer (T21-T23) primary side interconnects, another Same Name of Ends of each described other transformer (T21-T23) primary side interconnects mutually with each of three-phase alternating current electrical network respectively, described electric capacity (C30) and be connected to described three-phase power electronic inverter and described another three-phase power electronic inverter between.
15. high-power offset-type cascade diode H bridge Unity Power Factor PWM Rectifier Based according to claim 9, it is characterized in that: wherein said three-phase main power circuit also comprises parallel three phase compensating module unit and electric capacity (C30), described parallel three phase compensating module unit comprises another three-phase power electronic inverter, 3 filter inductances (L21-L23) and other 3 transformers (T21-T23), wherein, the series connection of each filter inductance (L21-L23) difference is between the secondary side and three-phase power electronic inverter of each other transformer (T21-T23), a Same Name of Ends of each described other transformer (T21-T23) primary side interconnects, another Same Name of Ends of each described other transformer (T21-T23) primary side interconnects mutually with each of three-phase alternating current electrical network respectively, described electric capacity (C30) and be connected to described three-phase power electronic inverter and described another three-phase power electronic inverter between.
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