CN208862744U - A kind of two-way bipolarity dcdc converter of low-voltage direct - Google Patents
A kind of two-way bipolarity dcdc converter of low-voltage direct Download PDFInfo
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- CN208862744U CN208862744U CN201820920739.8U CN201820920739U CN208862744U CN 208862744 U CN208862744 U CN 208862744U CN 201820920739 U CN201820920739 U CN 201820920739U CN 208862744 U CN208862744 U CN 208862744U
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Abstract
The utility model discloses a kind of two-way bipolarity dcdc converter of low-voltage direct, including converter circuit, detection circuit and controller；Converter circuit includes 4 insulated gate bipolar transistors, 2 capacitors and 2 inductance, one diode of the equal inverse parallel in the both ends of each insulated gate bipolar transistor；Detection circuit includes voltage collector and current collector；The input terminal receiving test circuit of controller voltage U2 collected, voltage U3, supply current I2 and supply current I3, it is to be equal to the half of the voltage U1 of higher level's DC grid DC1 that controller, which is controlled by algorithm by voltage U2 and voltage U3 control, and the output end of controller exports four driving signals for controlling insulated gate bipolar transistor.Converter provided by the utility model, is all made of wholly-controled device, and DC1 busbar voltage is divided equally, and expands power supply voltage level, forms bipolarity direct current supply, is able to achieve energy in bidirectional flow, and guarantee the bipolar DC balance of voltage.
Description
Technical field
The utility model relates to a kind of converter, more particularly to a kind of two-way bipolarity dcdc converter of low-voltage direct,
Belong to low-voltage direct power distribution network DCDC electronic power switch topology and control technology field.
Background technique
The power supply of low-voltage direct power grid monopole generally transmits electric energy using two electric wires, and DC bipolar power supply can reduce bus pair
Ground voltage grade, user can select single-stage, bipolar power supply as needed, moreover it is possible to meet in power grid different loads converter to input
The requirement of the balance of voltage.In order to construct 0V electrical voltage point, the balance of voltage usually is set in the front end of DC grid access end system
Device to realize different Grounding Types (source side can be grounded), and forms DC bipolar power supply mode.Existing for but not
Foot is: constructing bipolar power supply and wants two individual DCDC controllers, and is not necessarily able to achieve energy in bidirectional flow.
Utility model content
The main purpose of the utility model is that overcoming deficiency in the prior art, it is two-way double to provide a kind of low-voltage direct
Polarity dcdc converter is able to achieve energy in bidirectional flow, and guarantees the bipolar DC balance of voltage, and effectively, reliably runs.
In order to achieve the above object, the technical scheme adopted by the utility model is
A kind of two-way bipolarity dcdc converter of low-voltage direct, including converter circuit, detection circuit and controller；
The input terminal of the converter circuit respectively the anode end D1 and the end cathode D2, the positive end D1 and higher level's DC grid
The bus anode of DC1 is connected, and the end cathode D2 is connected with the bus cathode of higher level's DC grid DC1；
The output end of the converter circuit is respectively the anode end D3, the ground connection end D4 and the end cathode D5, and the positive end D3 is under
The bus anode of grade DC grid DC2 is connected, and the ground connection end D4 is connected with the bus cathode of junior DC grid DC2 and is grounded guarantee
Zero potential, the ground connection end D4 are connected with the bus anode of junior DC grid DC3, the mother at the end cathode D5 and junior's DC grid DC3
Line cathode is connected, and forms bipolarity direct current supply；
The converter circuit includes 4 insulated gate bipolar transistors, 2 capacitors and 2 inductance, and each insulated gate is double
One diode of the equal inverse parallel in the both ends of bipolar transistor；4 insulated gate bipolar transistors are denoted as V1, V2, V3, V4 respectively, and 2
A capacitor is denoted as C1, C2 respectively, and 2 inductance are denoted as L1, L2 respectively；The collector of the collector of V1, the anode of C1 and V3 with
The positive end D1 is connected, and the emitter of V1 is connected with one end of the collector of V2, L1 respectively, and the other end of L1 is negative with C1 respectively
Pole, the anode of C2, one end of L2 are connected, and the emitter of V3 is connected with the other end of the collector of V4, L2 respectively, the transmitting of V2
The emitter of pole, the cathode of C2 and V4 is connected with the end cathode D2；The collector of V3 is connected by positive wire with the anode end D3,
The cathode of C1 draws earth lead and is connected with the ground connection end D4, and the emitter of V4 is connected by cathode conductor with the end cathode D5；
The detection circuit includes voltage collector and current collector；The voltage collector is from positive wire and ground connection
The voltage U2 of junior DC grid DC2 is collected between conducting wire, and it is straight to collect between cathode conductor and earth lead junior
The voltage U3 of galvanic electricity net DC3；The current collector collects supply current I2 from positive wire, and adopts from cathode conductor
Collect supply current I3；
The input terminal receiving test circuit of controller voltage U2 collected, voltage U3, supply current I2 and power supply
Electric current I3, it is the voltage U1 for being equal to higher level's DC grid DC1 that controller, which is controlled by algorithm by voltage U2 and voltage U3 control,
Half, the output end of controller exports four driving signals for controlling insulated gate bipolar transistor；Four driving signals
Respectively g1, g2, g3, g4, g1 drive the grid of V1, and g2 drives the grid of V2, and g3 drives the grid of V3, and g4 drives the grid of V4
Pole.
The utility model is further arranged to: the controller controls electricity using two groups of identical independent control algorithms respectively
U2 and voltage U3 is pressed, independent control algorithm uses Current Voltage double-closed-loop control, and the Current Voltage double-closed-loop control includes electricity
Press outer loop control and current inner loop control.
The utility model is further arranged to: the controller, is used for when controlling voltage U2, by that will control DC2 electricity
Press setting value UDC2_refAnd the deviation of voltage U2 is through pi regulator output order current signal iref2, by the instruction current signal
iref2And the deviation of supply current I2 exports modulated signal u through pi regulatorref2, by modulated signal uref2With triangular carrier wink
After duration is compared, output drive signal g4, g3 control V4, V3 respectively；Wherein, UDC2_refFor higher level's DC grid DC1's
The half of voltage U1；
The controller is used for when controlling voltage U3, by that will control DC3 voltage set value UDC3_refWith voltage U3's
Deviation is through pi regulator output order current signal iref3, by instruction current signal iref3And the deviation of supply current I3 is through PI
Adjuster exports modulated signal uref3, by modulated signal uref3After being compared with triangular carrier instantaneous value, output drive signal
G1, g2 control V1, V2 respectively；Wherein, UDC3_refFor the half of the voltage U1 of higher level's DC grid DC1.
The utility model is further arranged to: the voltage collector is voltage transformer.
The utility model is further arranged to: the current collector is current transformer.
The utility model is further arranged to: the controller controls insulated gate bipolar by optical fiber output driving signal
Transistor.
Compared with prior art, the utility model has the beneficial effect that
Two-way bipolarity dcdc converter, is all made of wholly-controled device in low-voltage direct distribution provided by the utility model,
Energy can be with two-way flow, and guarantees the bipolar DC balance of voltage, and test result is very intuitive, and can effectively, reliably
Operation.
Above content is only the general introduction of technical solutions of the utility model, in order to better understand the technology of the utility model
Means, the utility model will be further described with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the two-way bipolarity dcdc converter of low-voltage direct of the utility model；
Fig. 2 is the structural representation of converter circuit in a kind of two-way bipolarity dcdc converter of low-voltage direct of the utility model
Figure；
Fig. 3 is that DC2 voltage controls live part circuit topology figure；
Fig. 4 is DC2 voltage control block diagram；
Fig. 5 is that DC3 voltage controls live part circuit topology figure；
Fig. 6 is DC4 voltage control block diagram；
Fig. 7 is the emulation schematic diagram of the utility model；
Fig. 8 is DC2 busbar voltage simulation result；
Fig. 9 is DC3 busbar voltage simulation result.
Specific embodiment
With reference to the accompanying drawings of the specification, the utility model is further described.
As shown in Figures 1 and 2, the utility model provides a kind of two-way bipolarity dcdc converter of low-voltage direct, including becomes
Converter circuit, detection circuit and controller.
The input terminal of the converter circuit respectively the anode end D1 and the end cathode D2, the positive end D1 and higher level's DC grid
The bus anode of DC1 is connected, and the end cathode D2 is connected with the bus cathode of higher level's DC grid DC1.
The output end of the converter circuit is respectively the anode end D3, the ground connection end D4 and the end cathode D5, and the positive end D3 is under
The bus anode of grade DC grid DC2 is connected, and the ground connection end D4 is connected with the bus cathode of junior DC grid DC2 and is grounded guarantee
Zero potential, the ground connection end D4 are connected with the bus anode of junior DC grid DC3, the mother at the end cathode D5 and junior's DC grid DC3
Line cathode is connected, and forms bipolarity direct current supply.
The converter circuit includes 4 insulated gate bipolar transistor IGBT (Insulated Gate Bipolar
Transistor), 2 capacitors and 2 inductance, one diode of the equal inverse parallel in the both ends of each insulated gate bipolar transistor；4
A insulated gate bipolar transistor is denoted as V1, V2, V3, V4 respectively, and 2 capacitors are denoted as C1, C2 respectively, and 2 inductance are denoted as respectively
L1,L2；The collector of the collector of V1, the anode of C1 and V3 is connected with the positive end D1, the emitter of V1 respectively with the collection of V2
Electrode, one end of L1 are connected, and the other end of L1 is connected with one end of the cathode of C1, the anode of C2, L2 respectively, the emitter point of V3
Be not connected with the other end of the collector of V4, L2, the emitter of the emitter of V2, the cathode of C2 and V4 with the end cathode D2 phase
Even；The collector of V3 is connected by positive wire with the anode end D3, and the cathode of C1 draws earth lead and is connected with the ground connection end D4, V4
Emitter be connected with the end cathode D5 by cathode conductor.
The detection circuit includes voltage collector and current collector, and the voltage collector is voltage transformer, institute
Stating current collector is current transformer；The voltage collector collects junior's direct current between positive wire and earth lead
The voltage U2 of power grid DC2, and collect between cathode conductor and earth lead the voltage U3 of junior DC grid DC3；It is described
Current collector collects supply current I2 from positive wire, and supply current I3 is collected from cathode conductor.
The input terminal receiving test circuit of controller voltage U2 collected, voltage U3, supply current I2 and power supply
Electric current I3, it is the voltage U1 for being equal to higher level's DC grid DC1 that controller, which is controlled by algorithm by voltage U2 and voltage U3 control,
Half, the output end of controller exports four driving signals for controlling insulated gate bipolar transistor；Four driving signals
Respectively g1, g2, g3, g4, g1 drive the grid of V1, and g2 drives the grid of V2, and g3 drives the grid of V3, and g4 drives the grid of V4
Pole.
The controller controls insulated gate bipolar transistor by optical fiber output driving signal.
The controller controls voltage U2 and voltage U3 using two groups of identical independent control algorithms respectively, and independent control is calculated
Method uses Current Voltage double-closed-loop control, and the Current Voltage double-closed-loop control includes outer voltage control and current inner loop control
System.
The controller is when controlling voltage U2, by that will control DC2 voltage set value UDC2_refAnd the deviation of voltage U2
Through pi regulator output order current signal iref2, by instruction current signal iref2And the deviation of supply current I2 is adjusted through PI
Device exports modulated signal uref2, by modulated signal uref2After being compared with triangular carrier instantaneous value, output drive signal g4,
G3 controls V4, V3 respectively；Wherein, UDC2_refFor the half of the voltage U1 of higher level's DC grid DC1.
The controller is when controlling voltage U3, by that will control DC3 voltage set value UDC3_refAnd the deviation of voltage U3
Through pi regulator output order current signal iref3, by instruction current signal iref3And the deviation of supply current I3 is adjusted through PI
Device exports modulated signal uref3, by modulated signal uref3After being compared with triangular carrier instantaneous value, output drive signal g1,
G2 controls V1, V2 respectively；Wherein, UDC3_refFor the half of the voltage U1 of higher level's DC grid DC1.
The utility model provides a kind of two-way bipolarity dcdc converter of low-voltage direct, and the course of work is as follows:
1, by the end D1, the bus both ends of the end D2 connection higher level's DC grid DC1, i.e. D1 terminates the anode of DC1, D2 termination
The cathode of DC1；The end D3, the end D4 connect the bus both ends of junior's DC grid DC2, i.e. D3 connects the anode of DC2, and the end D4 is as DC2
Cathode ground connection guarantee zero potential；The end D4, the end D5 connection junior's DC grid DC3 bus both ends, i.e., the end D4 as DC3 just
Pole, D5 terminate DC3 cathode.The driving signal of 4 IGBT is latched at this time.
2, voltage U2, the U3 for acquiring DC2, DC3 bus, acquire electric current I2, I3 of bipolar bus.
3, DC2 DC voltage is controlled, is individually controlled using one group, circuit topology live part is as shown in Figure 3 at this time.Benefit
Current Voltage double-closed-loop control is used with U2, I2, it is setting value U that outer voltage, which controls DC2 voltage,DC2_ref, value is preset as DC1
The half of DC voltage, current inner loop guarantee electric current dynamic response control speed, output drive signal g4, g3 control respectively V4,
V3, control are as shown in Figure 4.
4, DC3 DC voltage is controlled, is individually controlled using one group, circuit topology live part is as shown in Figure 5 at this time；Benefit
Current Voltage double-closed-loop control is used with U3, I3, it is setting value U that outer voltage, which controls DC3 voltage,DC3_ref, value is preset as DC1
The half of DC voltage, current inner loop guarantee electric current dynamic response control speed, output drive signal g1, g2 control respectively V1,
V2, control are as shown in Figure 6.
5, simulation model is built using MATLAB/SIMULINK as shown in fig. 7, DC1 busbar voltage is 750V, setting DC2
Busbar voltage UDC2_refFor+375V, DC3 busbar voltage UDC3_refFor -375V, simulation result DC2 busbar voltage as shown in figure 8,
DC3 busbar voltage is as shown in Figure 9.
The innovative point of the utility model is, DC1 busbar voltage is divided equally, and expands power supply voltage level, and formed bipolar
Property direct current supply, be able to achieve energy in bidirectional flow, and guarantee the bipolar DC balance of voltage, and effectively, reliable operation.
The basic principles and main features and advantage of the utility model have been shown and described above.The technical staff of the industry
It should be appreciated that the present utility model is not limited to the above embodiments, the above embodiments and description only describe this
The principle of utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model also has various change
And improvement, these various changes and improvements fall within the scope of the claimed invention.The utility model requires protection scope
It is defined by the appending claims and its equivalent thereof.
Claims (4)
1. a kind of two-way bipolarity dcdc converter of low-voltage direct, it is characterised in that: including converter circuit, detection circuit and control
Device processed；
The input terminal of the converter circuit respectively the anode end D1 and the end cathode D2, the positive end D1 and higher level's DC grid DC1
Bus anode be connected, the end cathode D2 is connected with the bus cathode of higher level's DC grid DC1；
The output end of the converter circuit is respectively that the anode end D3, the ground connection end D4 and the end cathode D5, the positive end D3 and junior are straight
The bus anode of galvanic electricity net DC2 is connected, and the ground connection end D4 is connected with the bus cathode of junior DC grid DC2 and is grounded zero electricity of guarantee
Position, the ground connection end D4 are connected with the bus anode of junior DC grid DC3, and the bus of the end cathode D5 and junior's DC grid DC3 are negative
Extremely it is connected, forms bipolarity direct current supply；
The converter circuit includes 4 insulated gate bipolar transistors, 2 capacitors and 2 inductance, each insulated gate bipolar
One diode of the equal inverse parallel in the both ends of transistor；4 insulated gate bipolar transistors are denoted as V1, V2, V3, V4,2 electricity respectively
Appearance is denoted as C1, C2 respectively, and 2 inductance are denoted as L1, L2 respectively；The collector of the collector of V1, the anode of C1 and V3 with anode
The end D1 be connected, the emitter of V1 is connected with one end of the collector of V2, L1 respectively, the other end of L1 respectively with the cathode of C1, C2
Anode, L2 one end be connected, the emitter of V3 is connected with the other end of the collector of V4, L2 respectively, the emitter of V2, C2
The emitter of cathode and V4 are connected with the end cathode D2；The collector of V3 is connected by positive wire with the anode end D3, and C1's is negative
Pole draws earth lead and is connected with the ground connection end D4, and the emitter of V4 is connected by cathode conductor with the end cathode D5；
The detection circuit includes voltage collector and current collector；The voltage collector is from positive wire and earth lead
Between collect the voltage U2 of junior DC grid DC2, and junior's direct current is collected between cathode conductor and earth lead
Net the voltage U3 of DC3；The current collector collects supply current I2 from positive wire, and collects from cathode conductor
Supply current I3；
The input terminal receiving test circuit of controller voltage U2 collected, voltage U3, supply current I2 and supply current
I3, controller is controlled by algorithm to be controlled voltage U2 and voltage U3 to be equal to the one of the voltage U1 of higher level's DC grid DC1
Half, the output end of controller exports four driving signals for controlling insulated gate bipolar transistor；Four driving signal difference
The grid of V1 is driven for g1, g2, g3, g4, g1, g2 drives the grid of V2, and g3 drives the grid of V3, and g4 drives the grid of V4.
2. the two-way bipolarity dcdc converter of a kind of low-voltage direct according to claim 1, it is characterised in that: the voltage
Collector is voltage transformer.
3. the two-way bipolarity dcdc converter of a kind of low-voltage direct according to claim 1, it is characterised in that: the electric current
Collector is current transformer.
4. the two-way bipolarity dcdc converter of a kind of low-voltage direct according to claim 1, it is characterised in that: the control
Device controls insulated gate bipolar transistor by optical fiber output driving signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820920739.8U CN208862744U (en) | 2018-06-13 | 2018-06-13 | A kind of two-way bipolarity dcdc converter of low-voltage direct |
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| CN201820920739.8U CN208862744U (en) | 2018-06-13 | 2018-06-13 | A kind of two-way bipolarity dcdc converter of low-voltage direct |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108566090A (en) * | 2018-06-13 | 2018-09-21 | 国网江苏省电力有限公司电力科学研究院 | A kind of two-way bipolarity dcdc converter of low-voltage direct |
| CN110661433A (en) * | 2019-09-16 | 2020-01-07 | 西安西电电力***有限公司 | Power electronic transformer |
| CN114244112A (en) * | 2021-11-25 | 2022-03-25 | 南京麦格安倍电气科技有限公司 | Direct-current power supply converter suitable for airplane power supply and control method thereof |
-
2018
- 2018-06-13 CN CN201820920739.8U patent/CN208862744U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108566090A (en) * | 2018-06-13 | 2018-09-21 | 国网江苏省电力有限公司电力科学研究院 | A kind of two-way bipolarity dcdc converter of low-voltage direct |
| CN108566090B (en) * | 2018-06-13 | 2024-02-13 | 国网江苏省电力有限公司电力科学研究院 | Low-voltage direct-current bidirectional bipolar DCDC converter |
| CN110661433A (en) * | 2019-09-16 | 2020-01-07 | 西安西电电力***有限公司 | Power electronic transformer |
| CN114244112A (en) * | 2021-11-25 | 2022-03-25 | 南京麦格安倍电气科技有限公司 | Direct-current power supply converter suitable for airplane power supply and control method thereof |
| CN114244112B (en) * | 2021-11-25 | 2023-12-22 | 南京麦格安倍电气科技有限公司 | DC power supply converter suitable for aircraft power supply and control method thereof |
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