CN209472568U - A kind of high-power high-accuracy bi-directional power - Google Patents
A kind of high-power high-accuracy bi-directional power Download PDFInfo
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- CN209472568U CN209472568U CN201920350824.XU CN201920350824U CN209472568U CN 209472568 U CN209472568 U CN 209472568U CN 201920350824 U CN201920350824 U CN 201920350824U CN 209472568 U CN209472568 U CN 209472568U
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Abstract
The utility model belongs to large power supply technical field, proposes a kind of high-power high-accuracy bi-directional power, including two-way AC/DC rectification circuit module and two-way DC/DC translation circuit module；Two-way AC/DC rectification circuit module and two-way DC/DC translation circuit module pass through IGBT and realize AC/DC conversion and DC/DC conversion respectively, it is provided with precharging circuit on the input terminal of two-way AC/DC rectification circuit module, is provided with discharge module on the output end of two-way DC/DC translation circuit module.The utility model not only realizes the modularization of circuit, but also integrated level is high, and dynamic response is rapid, ripple is small, can be widely applied to large power supply field.
Description
Technical field
The utility model belongs to large power supply technical field, and in particular to a kind of high-power high-accuracy bi-directional power.
Background technique
With the fast development of world economy gradually decreased with existing organic energy and the mankind to the needs of the energy increasingly
Increase, the Present Global energy and environment are faced with huge challenge, need to carry out revolutionary change.With existing organic energy by
It is decrescence few, therefore the exploitation of green energy resource is conducive to have become main trend.High-power high-accuracy bi-directional power is to alterating and direct current
The device that pressure, current energy convert.It is widely used in electric car, subway, photovoltaic, electric car charging, battery simulator, electronic vapour
The fields such as the automatically controlled test macro of vehicle motor.
Currently, the prior art, small-power AC/DC and the DC/DC power module integrated using Mosfet is relatively more, but adopts
High power mode with IGBT formula is fewer, especially great power bidirectional AC/DC and DC/DC high density converter moduleization then because
For ripple is big, dynamic response is even more that cannot achieve slowly, cause bi-directional power in the prior art operating mode diversification and
The technical effect of a tractor serves several purposes is single, it is, therefore, desirable to provide a kind of high-power high-accuracy bi-directional power, to be applied to electric car
The fields such as the automatically controlled test of charger, battery testing, motor in electric automobile, photovoltaic.
Utility model content
The utility model provides a kind of dynamic to solve the problems, such as that ripple is big in the prior art, dynamic response is slow
Response is rapid, ripple is small and modular high-power high-accuracy bi-directional power.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows: a kind of high-power high-accuracy is two-way
Power supply, including two-way AC/DC rectification circuit module and two-way DC/DC translation circuit module；Two-way AC/DC rectification circuit module
In, three phase mains is connect with the input terminal of main circuit breaker QF1, the output end of main circuit breaker QF1 pass sequentially through main contactor KM1,
It is connect after isolating transformer T0, filter capacitor plate CS1, LCL filter circuit with the input terminal of alternating current-direct current power conversion unit；Bypass
The input terminal of A.C. contactor KM2 is connect with the output end of main circuit breaker QF1, and output end passes through preliminary filling resistance and isolating transformer
The input terminal of T0 connects；The output cathode and high-pressure side anode copper bar connecting terminal DCLink+ of alternating current-direct current power conversion unit connect
It connects, output negative pole is connect with high-pressure side cathode copper bar connecting terminal DCLink-；First high-pressure side high-frequency absorption capacitance group, first
High-pressure side equalizing resistance group and high-pressure side Support Capacitor group be connected in parallel the output cathode of alternating current-direct current power conversion unit with it is defeated
Out between cathode；
The alternating current-direct current power conversion unit includes IGBT1, IGBT2, IGBT3, IGBT4, IGBT5 and IGBT6, IGBT1,
The emitter of IGBT3, IGBT5 are connect with three output ends of LCL filter circuit respectively, the current collection of IGBT2, IGBT4, IGBT6
Pole is connect with the emitter of IGBT1, IGBT3, IGBT5 respectively, the collector and high-pressure side anode copper of IGBT1, IGBT3, IGBT5
Arrange connecting terminal DCLink+ connection, the emitter and high-pressure side cathode copper bar connecting terminal of IGBT2, IGBT4, IGBT6
DCLink- connection；
In two-way DC/DC translation circuit module, the second high-pressure side equalizing resistance group and the second high-pressure side high-frequency absorption capacitor
The both ends of group are connected in high-pressure side anode copper bar connecting terminal DCLink+ and high-pressure side cathode copper bar connecting terminal in parallel
Between DCLink-；The input both ends of tri- road crisscross parallel power conversion unit of DC/DC respectively with high-pressure side anode copper bar terminals
Sub- DCLink+ is connected with high-pressure side cathode copper bar connecting terminal DCLink-, output both ends respectively with low-pressure side anode copper bar DC+
It is connected with low-pressure side cathode copper bar DC-；The tri- road crisscross parallel power conversion unit of DC/DC include IGBT7, IGBT8,
IGBT9, IGBT10, IGBT11 and IGBT12, the collector and high-pressure side anode copper bar terminals of IGBT7, IGBT9, IGBT11
Sub- DCLink+ connection, the emitter and high-pressure side cathode copper bar connecting terminal DCLink- of IGBT8, IGBT10 and IGBT12 and low
Side cathode copper bar DC- connection is pressed, the emitter of IGBT7 and the collector of IGBT8 are connect with the input terminal of inductance L3, IGBT9's
Emitter and IGBT10 collector are connect with the input terminal of inductance L4, the emitter of IGBT11 and the collector of IGBT12 and inductance
The input terminal of L5 connects, and the output end of inductance L3, inductance L4 and inductance L5 are connect with low-pressure side anode copper bar DC+；Low-pressure side is just
Discharge loop is provided between pole copper bar DC+ and low-pressure side cathode copper bar DC-.
The discharge loop includes D.C. contactor KA1, D.C. contactor KA2, D.C. contactor KA3 and discharge resistance
R4；D.C. contactor KA1 is arranged between the output end of inductance L3 and low-pressure side anode copper bar DC+；D.C. contactor KA2 setting
Between high-pressure side cathode copper bar connecting terminal DCLink- and low-pressure side cathode copper bar DC-；Discharge resistance R0 and D.C. contactor
It is connected in parallel between low-pressure side anode copper bar DC+ and low-pressure side cathode copper bar DC- after KA2 series connection.
Two-way AC/DC rectification circuit module includes three-phase alternating current flow sensor, high voltage side current sensor CTD, high pressure
Side voltage sensor VS1, the three-phase alternating current flow sensor are arranged on the output end of the LCL filter circuit, the height
Pressure side current sensor CTD is passed through by high-pressure side anode copper bar connecting terminal DCLink+, high side voltage sensor VS1 connection
Between high-pressure side anode copper bar connecting terminal DCLink+ and high-pressure side cathode copper bar connecting terminal DCLink-；
Two-way DC/DC translation circuit module includes low-pressure side current sensor CT1 and low-pressure side voltage sensor VS2, institute
It states low-pressure side current sensor CT1 to be passed through by low-pressure side anode copper bar DC+, low-pressure side voltage sensor VS2 is connected to low-pressure side
Between positive copper bar DC+ and low-pressure side cathode copper bar DC-.
The three-phase alternating current flow sensor, high voltage side current sensor CTD and low-pressure side current sensor CT1 are to close
Circular current type sensor.
The LCL filter circuit includes filter reactor L1, filter capacitor CL1, bypass A.C. contactor KM3 and boosting electricity
Three input terminals of anti-device L2, the filter reactor L1 are connect with the output end of isolating transformer T0, output end and the liter
The input terminal connection of reactor L2 is pressed, the output end of boosting reactor L2 is connect with the input terminal of alternating current-direct current power conversion unit；
The contact output end with filter reactor L1 respectively that the three-phase input end of filter capacitor CL1 passes through bypass A.C. contactor KM3
Connection.
The first high-pressure side high-frequency absorption capacitance group includes high-frequency absorption capacitor C1, the high-frequency absorption capacitor being connected in parallel
C2, high-frequency absorption capacitor C3, high-frequency absorption capacitor C4, high-frequency absorption capacitor C5 and high-frequency absorption capacitor C6, the high pressure are collateral
Supportting capacitance group includes the Support Capacitor C7 being connected in parallel, Support Capacitor C8, Support Capacitor C9, Support Capacitor C10, Support Capacitor
C11, Support Capacitor C12, Support Capacitor C13, Support Capacitor C14 and Support Capacitor C15, the first high-pressure side equalizing resistance group include
Equalizing resistance RB1, equalizing resistance RB2, equalizing resistance RB3 and the equalizing resistance RB4 being connected in parallel；
Second high-pressure side equalizing resistance includes the equalizing resistance RB5 being connected in parallel, equalizing resistance RB6, equalizing resistance
RB7 and equalizing resistance RB8；The second high-pressure side high-frequency absorption capacitance group includes high-frequency absorption capacitor C16, the height being connected in parallel
Frequency Absorption Capacitance C17, high-frequency absorption capacitor C18, high-frequency absorption capacitor C19, high-frequency absorption capacitor C20 and high-frequency absorption capacitor
C21；The low-pressure side Support Capacitor group includes the Support Capacitor C31 being connected in parallel, Support Capacitor C32, Support Capacitor C33, branch
Support capacitor C34, Support Capacitor C35, Support Capacitor C36, Support Capacitor C37, Support Capacitor C38, Support Capacitor C39, support electricity
Hold C40, Support Capacitor C41 and Support Capacitor C42, equalizing resistance RB31 that the low pressure side resistance group is connected in parallel, equal piezoelectricity
Resistance RB32, it equalizing resistance RB33, equalizing resistance RB34, equalizing resistance RB35, equalizing resistance RB36, equalizing resistance RB37, presses
Resistance RB38, equalizing resistance RB39, equalizing resistance RB40, equalizing resistance RB41 and equalizing resistance RB42.
Resistance in first high-pressure side equalizing resistance group, the second high-pressure side equalizing resistance group and low pressure side resistance group is pottery
Porcelain resistance.
The isolating transformer T0 is △/Y type isolating transformer.
A kind of high-power high-accuracy bi-directional power includes multiple two-way DC/DC translation circuit modules, the multiple
The input/output terminal of two-way DC/DC translation circuit module is connected in parallel.
It is a kind of big that the utility model has the advantages that the utility model embodiment provides compared with prior art
Power high-precision bi-directional power, including two-way AC/DC rectification circuit module and two-way DC/DC translation circuit module, they distinguish
It may be implemented the transformation of two-way alternating current-direct current and the energy conversion of two-way high-low pressure direct current, in the utility model, AC/DC rectification
Circuit module is using current inner loop outer voltage in topology, and external again added with electric current loop, road polycyclic in this way combines, response
Rapidly, reliable for operation；Two-way DC/DC translation circuit module, can will be multiple double using three-phase crisscross parallel topological structure
Input and output to DC/DC translation circuit module are in parallel, realize synchronously control, realize more high-power output；The utility model mentions
A kind of high-power high-accuracy bi-directional power out compares effect clearly in practical applications, and can also be by multiple institutes
The high-power high-accuracy bi-directional power stated carries out multi-machine parallel connection, to realize the increase of power.Therefore, the utility model is not only realized
The modularization of circuit, and integrated level is high, and dynamic response is rapid, ripple is small, can be returned with a tractor serves several purposes, the especially electric discharge of rear class
Road can discharge to unit under test, protect personal safety, also protect equipment of itself simultaneously, extend service life of equipment.
Detailed description of the invention
Fig. 1 is a kind of two-way AC/DC rectification main circuit of high-power high-accuracy bi-directional power in the utility model embodiment
The circuit connection diagram of module；
Fig. 2 is a kind of two-way DC/DC transformation main circuit of high-power high-accuracy bi-directional power in the utility model embodiment
The circuit connection diagram of module.
Specific embodiment
It is right below in conjunction with specific embodiments and the drawings to keep the technical solution of the utility model and advantage clearer
The technical solution of the utility model is clearly and completely described, it is clear that described embodiment is one of the utility model
Divide embodiment, instead of all the embodiments；Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, is fallen within the protection scope of the utility model.
As depicted in figs. 1 and 2, the utility model embodiment provides a kind of high-power high-accuracy bi-directional power, including double
To AC/DC rectification circuit module and two-way DC/DC translation circuit module.Wherein, the input terminal of two-way AC/DC rectification circuit module
Pass through U, V, W of power cable and power grid connection；Output cathode is connect with high-pressure side anode copper bar connecting terminal DCLink+, defeated
Cathode is connect with high-pressure side cathode copper bar connecting terminal DCLink- out；The input anode and height of two-way DC/DC translation circuit module
The DCLink+ connection of side anode copper bar connecting terminal is pressed, input cathode is connect with high-pressure side cathode copper bar connecting terminal DCLink-,
Input anode is connect with low-pressure side anode copper bar DC+, and output negative terminal is connect with low-pressure side cathode copper bar DC-.
Specifically, as shown in Figure 1, in two-way AC/DC rectification circuit module, the input of three phase mains and main circuit breaker QF1
The output end of end connection, main circuit breaker QF1 is connect by main contactor KM1 with the input terminal of isolating transformer T0, bypass exchange
The input terminal of contactor KM2 and the output end of main circuit breaker QF1 and connection, output end pass through preliminary filling resistance and isolating transformer T0
Input terminal connection, the output end of isolating transformer T0 passes sequentially through filter reactor L1, boosting reactor L2 and three-phase alternating current
It is connect after current sensor with the input terminal of alternating current-direct current power conversion unit；The three-phase input end of filter capacitor plate CS1 respectively with
The three-phase output end of isolating transformer T0 connects, the touching that the three-phase input end of filter capacitor CL1 passes through bypass A.C. contactor KM3
Point is connect with the output end of filter reactor L1 respectively；First high-pressure side high-frequency absorption capacitance group, the first high-pressure side equalizing resistance
The both ends of group and high-pressure side Support Capacitor group are connected in parallel between the output positive and negative anodes of alternating current-direct current power conversion unit；Alternating current-direct current
The output cathode of power conversion unit is connect with high-pressure side anode copper bar connecting terminal DCLink+, and output negative pole and high-pressure side are negative
Pole copper bar connecting terminal DCLink- connection；High voltage side current sensor CTD is by high-pressure side anode copper bar connecting terminal DCLink+
It passes through, high side voltage sensor VS1 is connected to high-pressure side anode copper bar connecting terminal DCLink+ and high-pressure side cathode copper bar connects
Between line terminals DCLink-.That is, being filtered in two-way AC/DC rectification circuit module using net side LCL type in the present embodiment
Wave circuit.In addition, bypass A.C. contactor KM2 and preliminary filling resistance are connected, the preliminary filling circuit to be formed and main contactor are in main circuit breaker
Between isolating transformer, it is arranged so and saves one group of functional loop.Preliminary filling resistance includes setting resistance R1 resistance R2 and resistance
R3, they are separately positioned in one of them of three output ends of bypass A.C. contactor KM2.Specifically, three-phase alternating current
Flow sensor includes current sensor CTA, CTB and CTC, they are separately positioned on three output ends of boosting reactor L2.
Specifically, as shown in Fig. 2, in two-way DC/DC translation circuit module, the second high-pressure side equalizing resistance group and second high
The both ends of pressure side high-frequency absorption capacitance group are connected in parallel high-pressure side anode copper bar connecting terminal DCLink+ and high-pressure side cathode copper bar
Between connecting terminal DCLink-；The input anode and input negative terminal of tri- road crisscross parallel power conversion unit of DC/DC respectively with height
Pressure side anode copper bar connecting terminal DCLink+ is connected with high-pressure side cathode copper bar connecting terminal DCLink-, three output plus terminals point
It is connect not after inductance L3, L4 and L5 with low-pressure side anode copper bar DC+, output negative terminal is connect with low-pressure side cathode copper bar DC-；
The both ends of low-pressure side Support Capacitor group and low pressure side resistance group are connected in low-pressure side anode copper bar DC+ in parallel respectively and low-pressure side is negative
Between the copper bar DC- of pole；Low-pressure side current sensor CT1 is passed through by low-pressure side anode copper bar DC+, low-pressure side voltage sensor VS2
It is connected between low-pressure side anode copper bar DC+ and low-pressure side cathode copper bar DC-；Low-pressure side anode copper bar both ends are connected with directly through bolt
Contactor KA1 is flowed, low-pressure side cathode copper bar both ends are connected with D.C. contactor KA2, one end of discharge resistance R0 and direct current through bolt
Second side of contactor KA2 connects, the second side of the other end through D.C. contactor KA3 Yu low-pressure side negative DC contactor KA1
Connection.
Wherein, discharge resistance R4 and D.C. contactor KA1, D.C. contactor KA2, D.C. contactor KA2 composition are discharged back
Road.Discharge loop is arranged by the rear end low-pressure side in two-way DC/DC translation circuit module in the present embodiment, for load system
Personal safety is protected in electric discharge.
Specifically, in the two-way AC/DC rectification circuit module of the present embodiment, the first high-pressure side high-frequency absorption capacitance group
Including high-frequency absorption capacitor C1, high-frequency absorption capacitor C2, high-frequency absorption capacitor C3, the high-frequency absorption capacitor C4, height being connected in parallel
Frequency Absorption Capacitance C5 and high-frequency absorption capacitor C6, the high-pressure side Support Capacitor group include the Support Capacitor C7 being connected in parallel, branch
Support capacitor C8, Support Capacitor C9, Support Capacitor C10, Support Capacitor C11, Support Capacitor C12, Support Capacitor C13, Support Capacitor
C14 and Support Capacitor C15, the first high-pressure side equalizing resistance group include the equalizing resistance RB1 being connected in parallel, equalizing resistance RB2,
Piezoresistance RB3 and equalizing resistance RB4.
Specifically, in the two-way DC/DC translation circuit module of the present embodiment, second high-pressure side equalizing resistance includes simultaneously
Join equalizing resistance RB5, equalizing resistance RB6, equalizing resistance RB7 and the equalizing resistance RB8 of connection；Second high-pressure side high frequency is inhaled
Receiving capacitance group includes the high-frequency absorption capacitor C16 being connected in parallel, high-frequency absorption capacitor C17, high-frequency absorption capacitor C18, high frequency suction
Receive capacitor C19, high-frequency absorption capacitor C20 and high-frequency absorption capacitor C21；The low-pressure side Support Capacitor group includes being connected in parallel
Support Capacitor C31, Support Capacitor C32, Support Capacitor C33, Support Capacitor C34, Support Capacitor C35, Support Capacitor C36, support
Capacitor C37, Support Capacitor C38, Support Capacitor C39, Support Capacitor C40, Support Capacitor C41 and Support Capacitor C42, the low pressure
Equalizing resistance RB31 that side resistance group is connected in parallel, equalizing resistance RB32, equalizing resistance RB33, equalizing resistance RB34, equal piezoelectricity
Resistance RB35, it equalizing resistance RB36, equalizing resistance RB37, equalizing resistance RB38, equalizing resistance RB39, equalizing resistance RB40, presses
Resistance RB41 and equalizing resistance RB42.
Specifically, as shown in Figure 1, the alternating current-direct current power conversion unit include IGBT1, IGBT2, IGBT3, IGBT4,
IGBT5 and IGBT6, the emitter of described IGBT1, IGBT3, IGBT5 are connect with three output ends of boosting reactor L2 respectively,
The collector of described IGBT2, IGBT4, IGBT6 are connect with the emitter of described IGBT1, IGBT3, IGBT5 respectively, described
The collector of IGBT1, IGBT3, IGBT5 respectively with the output cathode and high-pressure side anode copper as alternating current-direct current power conversion unit
Connecting terminal DCLink+ connection is arranged, the emitter of described IGBT2, IGBT4, IGBT6 are as the defeated of alternating current-direct current power conversion unit
Cathode is connect with high-pressure side cathode copper bar connecting terminal DCLink- out.That is, in two-way AC/DC rectification circuit module, institute
It states and is connected to the first high-pressure side high frequency between the collector of IGBT1, IGBT3, IGBT5 and the emitter of IGBT2, IGBT4, IGBT6
Absorption Capacitance group.
Specifically, as shown in Fig. 2, tri- road crisscross parallel power conversion unit of the DC/DC include IGBT7, IGBT8,
IGBT9, IGBT10, IGBT11 and IGBT12, the collector and high-pressure side anode copper bar of described IGBT7, IGBT9, IGBT11 connect
Line terminals DCLink+ connection, the emitter and high-pressure side cathode copper bar connecting terminal of described IGBT8, IGBT10 and IGBT12
DCLink- connection, the emitter of the IGBT7 and the collector of IGBT8 are connect with the input terminal of inductance L3, the IGBT9's
Emitter and IGBT10 collector are connect with the input terminal of inductance L4, the collector of the emitter of the IGBT11 and IGBT12 with
The input terminal of inductance L5 connects, that is to say, that in two-way DC/DC translation circuit module, described IGBT7, IGBT9, IGBT11's
The second high-pressure side high-frequency absorption capacitance group is connected between collector and the emitter of IGBT8, IGBT10, IGBT12.
In addition, bi-directional power can not only only include a two-way DC/DC translation circuit module in the utility model, also
May include multiple two-way DC/DC translation circuit modules, by by the input and output of multiple two-way DC/DC translation circuit modules simultaneously
Connection realizes synchronously control, more high-power output may be implemented, to meet different application demands.
Wherein, the isolating transformer T0 is △/Y type isolating transformer.
In addition, in the present embodiment, the three-phase alternating current flow sensor, high voltage side current sensor CTD and low-pressure side electricity
Flow sensor CT1 is closed loop current type sensor, the first high-pressure side equalizing resistance group, the second high-pressure side equalizing resistance group and low
Pressing the resistance in side resistance group is ceramic resistor.Light current sampling circuit resistance precision is 0.01%, and capacitor is that low-capacitance is thin
Membrane capacitance.
The working principle of the utility model is as follows: the control sequence of main circuit is to be attracted main circuit breaker QF1, and control bypass is handed over
Contactor KM2 is flowed to be attracted, system preliminary filling loop works charge to rear class high-pressure side Support Capacitor C7-C15, after preliminary filling is completed,
Main contactor KM1 is attracted, and bypass A.C. contactor KM3 is attracted, and then DSP opens pass through driving circuit control IGBT1~IGBT6
It is disconnected, PWM waveform output is carried out, so that the biphase rectification source of high-power high-accuracy bi-directional power is run.DSP is controlled through driving circuit
IGBT7~IGBT12 opens shutdown, carries out PWM waveform output, so that the pressure regulation source work of high-power high-accuracy bi-directional power is defeated
Target voltage current value out.
The utility model embodiment provides a kind of high-power high-accuracy bi-directional power, including two-way AC/DC rectification circuit
Module and two-way DC/DC translation circuit module, they may be implemented respectively two-way alternating current-direct current transformation and two-way height straightening
The energy conversion of stream.In specific application, not only can be in parallel by the input and output of multiple two-way DC/DC translation circuit modules,
It realizes synchronously control, realizes more high-power output；Furthermore, it is also possible to which multiple high-power high-accuracy bi-directional powers are carried out
Multi-machine parallel connection, to realize the increase of power.Therefore, the utility model not only realizes the modularization of circuit, but also integrated level is high,
Dynamic response is rapid, ripple is small, can be 0.1%F.S with a tractor serves several purposes, output voltage Measure Precision, and current precision reaches 0.1%
F.S.Especially the discharge loop of rear class can discharge to unit under test, protect personal safety, also protect equipment of itself simultaneously, extend
Service life of equipment.
The embodiments of the utility model have been described in detail above with reference to the accompanying drawings, but the utility model is not limited to
Embodiment is stated, within the knowledge of a person skilled in the art, the utility model aims can also not departed from
Under the premise of various changes can be made.
Claims (9)
1. a kind of high-power high-accuracy bi-directional power, which is characterized in that including two-way AC/DC rectification circuit module and two-way DC/
DC translation circuit module；In two-way AC/DC rectification circuit module, three phase mains is connect with the input terminal of main circuit breaker QF1, main disconnected
The output end of road device QF1 pass sequentially through after main contactor KM1, isolating transformer T0, filter capacitor plate CS1, LCL filter circuit with
The input terminal of alternating current-direct current power conversion unit connects；Bypass the input terminal of A.C. contactor KM2 and the output end of main circuit breaker QF1
Connection, output end are connect by preliminary filling resistance with the input terminal of isolating transformer T0；The output of alternating current-direct current power conversion unit is just
Pole is connect with high-pressure side anode copper bar connecting terminal DCLink+, output negative pole and high-pressure side cathode copper bar connecting terminal DCLink-
Connection；First high-pressure side high-frequency absorption capacitance group, the first high-pressure side equalizing resistance group and high-pressure side Support Capacitor group are connected in parallel
Between the output cathode and output negative pole of alternating current-direct current power conversion unit；
The alternating current-direct current power conversion unit includes IGBT1, IGBT2, IGBT3, IGBT4, IGBT5 and IGBT6, IGBT1,
The emitter of IGBT3, IGBT5 are connect with three output ends of LCL filter circuit respectively, the current collection of IGBT2, IGBT4, IGBT6
Pole is connect with the emitter of IGBT1, IGBT3, IGBT5 respectively, the collector and high-pressure side anode copper of IGBT1, IGBT3, IGBT5
Arrange connecting terminal DCLink+ connection, the emitter and high-pressure side cathode copper bar connecting terminal of IGBT2, IGBT4, IGBT6
DCLink- connection；
In two-way DC/DC translation circuit module, the second high-pressure side equalizing resistance group and the second high-pressure side high-frequency absorption capacitance group
Both ends be connected in parallel high-pressure side anode copper bar connecting terminal DCLink+ and high-pressure side cathode copper bar connecting terminal DCLink- it
Between；The input both ends of tri- road crisscross parallel power conversion unit of DC/DC respectively with high-pressure side anode copper bar connecting terminal DCLink+
It is connected with high-pressure side cathode copper bar connecting terminal DCLink-, output both ends are negative with low-pressure side anode copper bar DC+ and low-pressure side respectively
Pole copper bar DC- connection；The tri- road crisscross parallel power conversion unit of DC/DC include IGBT7, IGBT8, IGBT9, IGBT10,
The collector of IGBT11 and IGBT12, IGBT7, IGBT9, IGBT11 are connect with high-pressure side anode copper bar connecting terminal DCLink+,
The emitter and high-pressure side cathode copper bar connecting terminal DCLink- and low-pressure side cathode copper bar of IGBT8, IGBT10 and IGBT12
DC- connection, the emitter of IGBT7 and the collector of IGBT8 are connect with the input terminal of inductance L3, the emitter of IGBT9 and
IGBT10 collector is connect with the input terminal of inductance L4, the input of the emitter of IGBT11 and the collector of IGBT12 and inductance L5
End connection, the output end of inductance L3, inductance L4 and inductance L5 are connect with low-pressure side anode copper bar DC+；Low-pressure side anode copper bar DC+
Discharge loop is provided between low-pressure side cathode copper bar DC-.
2. a kind of high-power high-accuracy bi-directional power according to claim 1, which is characterized in that the discharge loop includes
D.C. contactor KA1, D.C. contactor KA2, D.C. contactor KA3 and discharge resistance R4；D.C. contactor KA1 is arranged in inductance
Between the output end and low-pressure side anode copper bar DC+ of L3；D.C. contactor KA2 is arranged in high-pressure side cathode copper bar connecting terminal
Between DCLink- and low-pressure side cathode copper bar DC-；Discharge resistance R0 is connected in low pressure in parallel after connecting with D.C. contactor KA2
Between side anode copper bar DC+ and low-pressure side cathode copper bar DC-.
3. a kind of high-power high-accuracy bi-directional power according to claim 1, which is characterized in that two-way AC/DC rectified current
Road module includes three-phase alternating current flow sensor, high voltage side current sensor CTD, high side voltage sensor VS1, the three-phase
AC current sensor is arranged on the output end of the LCL filter circuit, and the high voltage side current sensor CTD is by high-pressure side
Positive copper bar connecting terminal DCLink+ is passed through, and high side voltage sensor VS1 is connected to high-pressure side anode copper bar connecting terminal
Between DCLink+ and high-pressure side cathode copper bar connecting terminal DCLink-；
Two-way DC/DC translation circuit module includes low-pressure side current sensor CT1 and low-pressure side voltage sensor VS2, described low
Pressure side current sensor CT1 is passed through by low-pressure side anode copper bar DC+, and low-pressure side voltage sensor VS2 is connected to low-pressure side anode
Between copper bar DC+ and low-pressure side cathode copper bar DC-.
4. a kind of high-power high-accuracy bi-directional power according to claim 3, which is characterized in that the three-phase alternating current
Sensor, high voltage side current sensor CTD and low-pressure side current sensor CT1 are closed loop current type sensor.
5. a kind of high-power high-accuracy bi-directional power according to claim 1, which is characterized in that the LCL filter circuit
Including filter reactor L1, filter capacitor CL1, bypass A.C. contactor KM3 and boosting reactor L2, the filter reactor L1
Three input terminals connect with the output end of isolating transformer T0, output end with it is described boosting reactor L2 input terminal connect,
The output end of boosting reactor L2 is connect with the input terminal of alternating current-direct current power conversion unit；The three-phase input end of filter capacitor CL1
Contact by bypassing A.C. contactor KM3 is connect with the output end of filter reactor L1 respectively.
6. a kind of high-power high-accuracy bi-directional power according to claim 1, which is characterized in that first high-pressure side is high
Frequency Absorption Capacitance group includes the high-frequency absorption capacitor C1 being connected in parallel, high-frequency absorption capacitor C2, high-frequency absorption capacitor C3, high frequency suction
Receiving capacitor C4, high-frequency absorption capacitor C5 and high-frequency absorption capacitor C6, the high-pressure side Support Capacitor group includes the branch being connected in parallel
Support capacitor C7, Support Capacitor C8, Support Capacitor C9, Support Capacitor C10, Support Capacitor C11, Support Capacitor C12, Support Capacitor
C13, Support Capacitor C14 and Support Capacitor C15, the first high-pressure side equalizing resistance group include the equalizing resistance RB1 being connected in parallel,
Piezoresistance RB2, equalizing resistance RB3 and equalizing resistance RB4；
Second high-pressure side equalizing resistance include the equalizing resistance RB5 being connected in parallel, equalizing resistance RB6, equalizing resistance RB7 and
Equalizing resistance RB8；The second high-pressure side high-frequency absorption capacitance group includes the high-frequency absorption capacitor C16 being connected in parallel, high frequency suction
Receive capacitor C17, high-frequency absorption capacitor C18, high-frequency absorption capacitor C19, high-frequency absorption capacitor C20 and high-frequency absorption capacitor C21；Institute
Stating low-pressure side Support Capacitor group includes the Support Capacitor C31, Support Capacitor C32, Support Capacitor C33, Support Capacitor being connected in parallel
C34, Support Capacitor C35, Support Capacitor C36, Support Capacitor C37, Support Capacitor C38, Support Capacitor C39, Support Capacitor C40,
Support Capacitor C41 and Support Capacitor C42, equalizing resistance RB31 that the low pressure side resistance group is connected in parallel, equalizing resistance RB32,
Equalizing resistance RB33, equalizing resistance RB34, equalizing resistance RB35, equalizing resistance RB36, equalizing resistance RB37, equalizing resistance
RB38, equalizing resistance RB39, equalizing resistance RB40, equalizing resistance RB41 and equalizing resistance RB42.
7. a kind of high-power high-accuracy bi-directional power according to claim 1, which is characterized in that the equal piezoelectricity in the first high-pressure side
Resistance in resistance group, the second high-pressure side equalizing resistance group and low pressure side resistance group is ceramic resistor.
8. a kind of high-power high-accuracy bi-directional power according to claim 1, which is characterized in that the isolating transformer T0
For △/Y type isolating transformer.
9. a kind of high-power high-accuracy bi-directional power according to claim 1, which is characterized in that described one kind is high-power
High-precision bi-directional power includes multiple two-way DC/DC translation circuit modules, the multiple two-way DC/DC translation circuit module it is defeated
Enter output end to be connected in parallel.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890834A (en) * | 2019-11-22 | 2020-03-17 | 合肥科威尔电源系统股份有限公司 | Adjusting circuit and adjusting method for reducing loss of two-stage power supply power tube |
| CN111130167A (en) * | 2019-11-27 | 2020-05-08 | 深圳国氢新能源科技有限公司 | Voltage conversion apparatus for hydrogen fuel cell |
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2019
- 2019-03-20 CN CN201920350824.XU patent/CN209472568U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890834A (en) * | 2019-11-22 | 2020-03-17 | 合肥科威尔电源系统股份有限公司 | Adjusting circuit and adjusting method for reducing loss of two-stage power supply power tube |
| CN110890834B (en) * | 2019-11-22 | 2022-12-27 | 科威尔技术股份有限公司 | Adjusting method of adjusting circuit for reducing loss of two-stage power supply power tube |
| CN111130167A (en) * | 2019-11-27 | 2020-05-08 | 深圳国氢新能源科技有限公司 | Voltage conversion apparatus for hydrogen fuel cell |
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