CN113036844B - Four-quadrant energy storage type airport static change power supply - Google Patents
Four-quadrant energy storage type airport static change power supply Download PDFInfo
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- CN113036844B CN113036844B CN202110248234.8A CN202110248234A CN113036844B CN 113036844 B CN113036844 B CN 113036844B CN 202110248234 A CN202110248234 A CN 202110248234A CN 113036844 B CN113036844 B CN 113036844B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a four-quadrant energy storage type static change power supply which comprises a charge-discharge selection switch, a four-quadrant converter, a power lithium battery system and an intermediate frequency transformer. The charging and discharging selection switch is a double-throw switch, and in a charging mode, the charging and discharging selection switch throws towards the power frequency mains supply input end, so that the 380V/50Hz power frequency mains supply is connected to the alternating current side of the four-quadrant converter, the four-quadrant converter works in a rectification mode at the moment, active power is injected into the power lithium battery system, and the electric quantity is gradually increased until the power lithium battery system is full; in a discharging mode, the charging and discharging selection switch is thrown to the medium-frequency static change output end, the four-quadrant converter works in an inverter mode and outputs medium-frequency voltage of 400V/400Hz, the medium-frequency voltage is applied to the high-voltage side of the medium-frequency transformer through the charging and discharging selection switch, and the medium-frequency transformer converts the medium-frequency voltage into voltage of 115V/400Hz so as to adapt to the power supply requirement of an airplane. The invention adopts the four-quadrant converter, solves the problems of charging and discharging inversion of the power battery, simplifies the circuit architecture of the power supply, reduces the equipment cost, can save the installation space and is convenient to be installed on a power supply vehicle to supply power for the airplane at the airport remote parking apron.
Description
Technical field:
the invention belongs to the field of high-power electronic equipment, in particular relates to a static change power supply device applied to an airport, and mainly solves the problem of power supply occasions in an airplane parking state of a remote airplane position.
The background technology is as follows:
modern airports have more airplane stations, part of airplanes are parked beside a corridor bridge, more airplanes are located at the far end of a terminal, and if no ground power supply is used for supplying power in the airplane parking state, the power supply can only be used for supplying power by virtue of an auxiliary power device of the airplane, so that the fuel oil of the airplane is required to be consumed, the environment is protected, and the cost is high. For an aircraft parked beside a corridor bridge, a static power supply can be used for obtaining power supply from the ground, but the aircraft at a far-end aircraft position is not easy to obtain the ground power supply, a power supply vehicle is generally parked beside the aircraft, the power supply is obtained from a terminal through a long cable and is converted into the aircraft to provide power supply, but the cable drag and drop operation is complex, and the line loss is high.
The energy storage type stationary power supply is a flexible solution for supplying power to a remote station, the stationary power supply is generally placed on a mobile power supply vehicle, a storage battery in the stationary power supply is converted into 115V/400Hz three-phase power supply required by aircraft power supply through an inverter, and a power battery, a corresponding charge-discharge circuit and a corresponding inverter circuit are needed in the mobile power supply vehicle at the moment, and the largest space for placing the battery can be reserved, so that the power supply capacity of the mobile power supply vehicle is improved as much as possible. Chinese patent CN201710977864.2 proposes a ground static change power supply system containing an energy storage battery, the invention comprises an AC-DC rectifier, a power lithium battery energy storage system, a DC-AC inverter and other components, when the residual electric quantity of the power lithium battery is insufficient, the power lithium battery energy storage system can be charged by connecting the AC-DC rectifier to a ground three-phase 50Hz power supply, the power lithium battery energy storage system can be moved to the side of an airplane at a remote airplane position after being filled, and the DC-AC inverter can convert the electric energy of the power lithium battery into 115V/400Hz power required by the airplane to supply power for the airplane. The invention well realizes the task of an energy storage type static change power supply, but the AC-DC rectifier only operates when the battery is charged, and the DC-AC inverter only operates when the battery is discharged, so that the equipment occupies a large volume, occupies a limited space of the power supply vehicle, and has limited battery capacity and insufficient power supply capacity.
The invention comprises the following steps:
the invention aims to provide a four-quadrant energy storage type static power supply, which can overcome the defects of large volume, high cost and small battery capacity of the current energy storage type static power supply caused by the built-in AC-DC rectifier and DC-AC inverter.
In order to achieve the above purpose, the technical scheme is that the four-quadrant energy storage type static change power supply comprises a charge-discharge selection switch (1), a four-quadrant converter (2), a power lithium battery system (3) and an intermediate frequency transformer (4), wherein the charge-discharge selection switch (1) is a double-throw switch and comprises three groups of terminals including a power frequency mains supply input end (11), an intermediate frequency static change output end (12) and a converter interface end (13), a power frequency mains supply of 380V/50Hz is connected to the power frequency mains supply input end (11) of the charge-discharge selection switch (1) and used as a charge input terminal, a high-voltage side (41) of the intermediate frequency transformer (4) is connected to the intermediate frequency static change output end (12) of the charge-discharge selection switch (1), a low-voltage side (42) of the intermediate frequency transformer (4) is used as an output end of the static change power supply to supply an airplane at a far-end machine position, an alternating current end (21) of the four-quadrant converter (2) is connected to the converter interface end (13) of the charge-discharge selection switch (1), and a direct current end (22) of the intermediate frequency transformer (2) is connected to a lithium power converter.
In a charging mode, the charging and discharging selection switch (1) throws towards the power frequency mains supply input end (11), so that the 380V/50Hz power frequency mains supply is connected to the alternating current side (21) of the four-quadrant converter (2) through the charging and discharging selection switch (1), and the four-quadrant converter works in a rectification mode and has a working state of high power factor and low harmonic current; active power is injected into the power lithium battery system (3), so that the electric quantity of the power lithium battery system (3) gradually increases until full. In a discharging mode, the charging and discharging selection switch (1) throws towards the medium-frequency static change output end (12), the four-quadrant converter (2) works in an inverter mode, namely an active power output quadrant, and outputs medium-frequency voltage of 400V/400Hz, the medium-frequency voltage is applied to the high-voltage side (41) of the medium-frequency transformer (4) through the medium-frequency static change output end (12) of the charging and discharging selection switch (1), the medium-frequency transformer converts the medium-frequency voltage into voltage of 115V/400Hz so as to adapt to the power supply requirement of an airplane, and because the four-quadrant converter (2) can flexibly control output current, the four-quadrant converter can be controlled more accurately according to loads, starting inrush current is avoided, and meanwhile required reactive power and harmonic load capacity can be provided for the airplane loads.
The charging and discharging selection switch (1) is provided with interlocking logic and consists of contactors KM1 and KM2 and control contacts Q1 and Q2, wherein an input terminal U1 of the contactor KM1 is connected with an input terminal U2 of the contactor KM2 and a signal terminal (13 a) in a converter interface end (13) of the charging and discharging selection switch (1); an input terminal V1 of the contactor KM1 is connected with an input terminal V2 of the contactor KM2 and a signal terminal (13 b) in a converter interface end (13) of the charge-discharge selection switch (1); an input terminal W1 of the contactor KM1 is connected with an input terminal W2 of the contactor KM2 and a signal terminal (13 c) in a converter interface end (13) of the charge-discharge selection switch (1); the output ends R1, S1 and T1 of the contactor KM1 are respectively used as signal terminals (11 a), (11 b) and (11 c) of a power frequency mains supply input end (11) of the charge-discharge selection switch (1); the output ends R2, S2 and T2 of the contactor KM2 are respectively used as signal terminals (12 a), (12 b) and (12 c) of a power frequency mains supply input end (12) of the charge-discharge selection switch (1); the control coil of the contactor KM1 is formed by connecting a control contact Q1 and a normally closed contact of the contactor KM2 in series; the control coil of the contactor KM2 is formed by connecting a control contact Q2 and a normally closed contact of the contactor KM1 in series, and through the connection, only one of the KM1 and the KM2 can be closed at most at any moment, so that the direct communication of power frequency commercial power to an intermediate frequency static change output end is avoided.
The four-quadrant converter (2) is a three-phase two-level full-bridge converter, and comprises a direct-current side capacitor Cdc, a three-phase full-bridge formed by six IGBTs of Q1/Q2/Q3/Q4/Q5/Q6 and a high-frequency filter circuit formed by L1/C1/L2/C2/L3/C3, wherein the direct-current side capacitor Cdc is connected between an anode 22+ and a cathode 22-of the three-phase full-bridge, collectors of Q1, Q3 and Q5 of the three-phase full-bridge are connected to the anode 22+ of the three-phase full-bridge, emitting stages of Q2, Q4 and Q6 of the three-phase full-bridge are connected to the cathodes 22-, Q1, Q3 and Q5 of the three-phase full-bridge respectively, and are connected to one ends of L1, L2 and L3, the other ends of L1, L2 and C3 are respectively connected to one ends of C1, C2 and C3 and serve as alternating-current ends of the three-phase two-level full-bridge converter, and the emitting stages of Q2, Q4 and Q6 of the three-phase full-bridge are connected together as high-frequency filter circuits.
The four-quadrant converter (2) is a three-phase three-level full-bridge converter, and comprises a direct-current side capacitor CX/CY, an A-phase bridge arm formed by 4 IGBTs of Q1a/Q2a/Q3a/Q4a and two diodes of D1a/D2a, a B-phase bridge arm formed by 4 IGBTs of Q1B/Q2B/Q3B/Q4B and two diodes of D1B/D2B, a C-phase bridge arm formed by 4 IGBTs of Q1C/Q2C/Q3C/Q4C and two diodes of D1C/D2C/L2/L3/C3, wherein the positive electrode of the direct-current side capacitor CX is connected with the positive electrode 22+ of the three-phase three-level full-bridge converter, the negative electrode of the direct-current side capacitor CY is connected with the negative electrode 22-of the three-phase three-level full-bridge converter, and the negative electrode of the direct-current side capacitor CX is connected with the positive electrode 22-phase three-level full-bridge converter as the positive electrode 1+ of the three-phase full-level full-bridge converter, and the positive electrode of the direct-current side capacitor CX and the negative electrode of the three-level full-bridge converter are connected with the positive electrode 22-phase full-bridge 1 to the full-bridge collector 1, and the full-phase full-bridge capacitor C1+ is connected with the full-phase full-bridge collector 1, and the full-bridge converter is connected with the full-phase full-bridge converter 1, and the full-bridge converter is the full-bridge converter the emitters of Q1a, Q1B, Q1C are respectively connected with the collectors of Q2a, Q2B, Q2C, the emitters of Q2a, Q2B, Q2C are respectively connected with the collectors of Q3a, Q3B, Q3C, the emitters of Q3a, Q3B, Q3C are respectively connected with the collectors of Q4a, Q4B, Q4C, the emitters of Q1a, Q1B, Q1C are all connected with the cathodes 22-, of D1a, D1B, D1C of the three-phase full bridge, the cathodes of D1a, D1B, D1C are respectively connected with the emitters of Q1a, Q1B, Q1C, the anodes of D2a, D2B, D2C are respectively connected with the emitters of Q3a, Q3B, Q3C, the anodes of D1a, D1B, D2C are all connected with the midpoints 22n of the three-phase full bridge, Q2B, Q2C, the emitters of Q2C and the cathodes of Q3a, Q3B, Q3C are respectively connected with the collectors of L1, L2C are respectively connected with the anodes of Q3a, L2B, L2C, the other ends of the L2 and the L3 are respectively connected with one ends of the C1, the C2 and the C3 and serve as alternating current ends of the three-phase two-level full-bridge converter, and the other sections of the C1, the C2 and the C3 are connected together and serve as midpoints of high-frequency filtering.
The power lithium battery system (3) comprises a lithium battery cell stack (33) and a battery management system (34), wherein the lithium battery cell stack (33) is formed by connecting a series of lithium battery cells with the same capacity in series and a fuse is connected in series with the positive electrode or the negative electrode, the battery management system (34) comprises a series of terminals which are respectively connected between the positive electrode and the negative electrode of each lithium battery cell, N lithium battery cells are connected in series, and a total of n+1 positive and negative terminals are connected to the battery management system (34), and the battery management system (34) collects the voltage of each lithium battery cell through the terminals and uploads the voltage information through a communication port;
the intermediate frequency transformer (4) is made of an amorphous alloy iron core, and the practical magnetic flux density of the amorphous alloy is 0.5-1.0 tesla;
the intermediate frequency transformer (4) is manufactured by adopting an oriented silicon steel sheet iron core with the thickness not exceeding 0.2mm, and the practical magnetic flux density of the silicon steel sheet is not more than 0.8 tesla in order to reduce the high-frequency loss of the iron core.
The beneficial effects of the invention are as follows:
aiming at the problems that an AC-DC rectifier and a DC-AC inverter in the current mobile airport ground static-change power supply do not work simultaneously, but each inverter occupies space, the four-quadrant converter is adopted to replace the AC-DC rectifier and the DC-AC inverter, and meanwhile, the problems of charging and discharging inversion of a power battery are solved, so that a complex AC-DC rectifying and DC-AC inversion circuit is omitted, the circuit architecture of the power supply is simplified, the equipment cost is reduced, the installation space is saved, more positions are saved for the power battery, and the power supply capacity of the power supply is improved.
Description of the drawings:
FIG. 1 is a schematic diagram of a conventional mobile airport ground static-change power system
FIG. 2 is a schematic diagram of the overall scheme adopted by the invention
Fig. 3 is a schematic diagram of a charge/discharge selection switch according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a four-quadrant converter according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of another embodiment of the four-quadrant converter of the present invention.
Fig. 6 is a schematic diagram of a power lithium battery system according to an embodiment of the present invention.
The specific embodiment is as follows:
the following detailed description of specific embodiments of the invention refers to the accompanying drawings:
fig. 1 is a schematic diagram of an invention CN201710977864.2, in which an independent AC-DC rectifier is used to charge a battery, and DC-AC cannot operate in a four-quadrant state, and intelligently outputs a functional quantity to an AC output end, so that the device occupies a larger volume, which is not beneficial to expanding the capacity of the device, and more space is reserved for placing an energy storage battery, thereby prolonging the power supply time.
Fig. 2 is a general block diagram of the present invention, and the technical scheme provided by the present invention is a four-quadrant energy storage type static power supply, which comprises a charge-discharge selection switch (1), a four-quadrant converter (2), a power lithium battery system (3) and an intermediate frequency transformer (4), wherein the charge-discharge selection switch (1) is a double-throw switch, and comprises three groups of terminals including a power frequency mains supply input end (11), an intermediate frequency static change output end (12) and a converter interface end (13), a 380V/50Hz power frequency mains supply is connected to the mains supply input end (11) of the charge-discharge selection switch (1) and is used as a charging input terminal, a high-voltage side (41) of the intermediate frequency transformer (4) is connected to the intermediate frequency static change output end (12) of the charge-discharge selection switch (1), a low-voltage side (42) of the intermediate frequency transformer (4) is used as an output end of the static power supply to supply an aircraft at a far-end station, an alternating current end (21) of the four-quadrant converter (2) is connected to the converter interface end (13) of the charge-discharge selection switch (1), and the power frequency converter (22) is connected to the lithium battery (22).
In a charging mode, the charging and discharging selection switch (1) throws towards the power frequency mains supply input end (11), so that the 380V/50Hz power frequency mains supply is connected to the alternating current side (21) of the four-quadrant converter (2) through the charging and discharging selection switch (1), and the four-quadrant converter works in a rectification mode and has a working state of high power factor and low harmonic current; active power is injected into the power lithium battery system (3), so that the electric quantity of the power lithium battery system (3) gradually increases until full. In a discharging mode, the charging and discharging selection switch (1) throws towards the medium-frequency static change output end (12), the four-quadrant converter (2) works in an inverter mode, namely an active power output quadrant, and outputs medium-frequency voltage of 400V/400Hz, the medium-frequency voltage is applied to the high-voltage side (41) of the medium-frequency transformer (4) through the medium-frequency static change output end (12) of the charging and discharging selection switch (1), the medium-frequency transformer converts the medium-frequency voltage into voltage of 115V/400Hz so as to adapt to the power supply requirement of an airplane, and because the four-quadrant converter (2) can flexibly control output current, the four-quadrant converter can be controlled more accurately according to loads, starting inrush current is avoided, and meanwhile required reactive power and harmonic load capacity can be provided for the airplane loads.
The intermediate frequency transformer (4) is made of an amorphous alloy iron core, and the practical magnetic flux density of the amorphous alloy is 0.5-1.0 tesla;
the intermediate frequency transformer (4) is manufactured by adopting an oriented silicon steel sheet iron core with the thickness not exceeding 0.2mm, and the practical magnetic flux density of the silicon steel sheet is not more than 0.8 tesla in order to reduce the high-frequency loss of the iron core.
Fig. 3 shows a specific embodiment of the charge-discharge selection switch of the present invention, where the charge-discharge selection switch (1) has interlocking logic and is composed of contactors KM1 and KM2 and control contacts Q1 and Q2, and an input terminal U1 of the contactor KM1 is connected with an input terminal U2 of the contactor KM2 and a signal terminal (13 a) in a converter interface end (13) of the charge-discharge selection switch (1); an input terminal V1 of the contactor KM1 is connected with an input terminal V2 of the contactor KM2 and a signal terminal (13 b) in a converter interface end (13) of the charge-discharge selection switch (1); an input terminal W1 of the contactor KM1 is connected with an input terminal W2 of the contactor KM2 and a signal terminal (13 c) in a converter interface end (13) of the charge-discharge selection switch (1); the output ends R1, S1 and T1 of the contactor KM1 are respectively used as signal terminals (11 a), (11 b) and (11 c) of a power frequency mains supply input end (11) of the charge-discharge selection switch (1); the output ends R2, S2 and T2 of the contactor KM2 are respectively used as signal terminals (12 a), (12 b) and (12 c) of a power frequency mains supply input end (12) of the charge-discharge selection switch (1); the control coil of the contactor KM1 is formed by connecting a control contact Q1 and a normally closed contact of the contactor KM2 in series; the control coil of the contactor KM2 is formed by connecting a control contact Q2 and a normally closed contact of the contactor KM1 in series, and through the connection, only one of the KM1 and the KM2 can be closed at most at any moment, so that the direct communication of power frequency commercial power to an intermediate frequency static change output end is avoided.
Fig. 4 shows a four-quadrant converter embodiment of the present invention, where the four-quadrant converter (2) is a three-phase two-level full-bridge converter, and includes a direct-current side capacitor Cdc, a three-phase full-bridge formed by six IGBTs of Q1/Q2/Q3/Q4/Q5/Q6, and a high-frequency filter circuit formed by L1/C1/L2/C2/L3/C3, the direct-current side capacitor Cdc is connected between the positive electrode 22+ and the negative electrode 22-of the three-phase full-bridge, collectors of Q1, Q3, and Q5 of the three-phase full-bridge are all connected to the positive electrode 22+ of the three-phase full-bridge, emission stages of Q2, Q4, and Q6 of the three-phase full-bridge are all connected to the negative electrode 22-, Q1, Q3, and Q5 of the three-phase full-bridge respectively, the collectors of Q2, Q4, and Q6 are connected to one end of L1, L2/L3, another end of L1, L2, and one end of L3 is respectively connected to one end of C1, C2, C3, and is used as a high-frequency filter section of the three-phase full-bridge, and C2, and the other end is connected together.
Fig. 5 shows another embodiment of the four-quadrant converter of the present invention, wherein the four-quadrant converter (2) is a three-phase three-level full-bridge converter, and comprises a dc-side capacitor CX/CY, an a-phase bridge arm formed by two diodes of Q1a/Q2a/Q3a/Q4a and D1a/D2a, a B-phase bridge arm formed by two diodes of Q1B/Q2B/Q3B/Q4B and D1B/D2B, a C-phase bridge arm formed by two diodes of Q1C/Q2C/Q3C/Q4C and D1C/D2C, and a high-frequency filter circuit formed by two diodes of L1/C1/L2/L3/C3, wherein the positive electrode of the dc-side capacitor CX is connected to the positive electrode 22+ of the three-phase full-bridge converter, the negative electrode of the dc-side capacitor CY is connected to the negative electrode 22 of the three-phase three-level full-bridge converter, the cathodes and the anodes of the direct-current side capacitors CX are connected together to serve as the midpoints 22n of the three-phase full bridge, the collectors of Q1a, Q1B and Q1C are connected to the anodes 22+ of the three-phase full bridge, the emitters of Q1a, Q1B and Q1C are respectively connected to the collectors of Q2a, Q2B and Q2C, the emitters of Q2a, Q2B and Q2C are respectively connected to the collectors of Q3a, Q3B and Q3C, the emitters of Q3a, Q3B and Q3C are respectively connected to the collectors of Q4a, Q4B and Q4C, the emitters of Q1a, Q1B and Q1C are connected to the cathodes 22-, of D1a, D1B and D1C are respectively connected to the emitters of Q1a, Q1B and Q1C, the anodes of D2a, D2B and D2C are respectively connected to the emitters of Q3a, Q3B and Q3C, the anodes of D1a, D1B and D2C are respectively connected to the collectors of the three-phase full bridge, the cathodes 22n of Q1a, Q1B and Q1C are respectively connected to the cathodes 22n of the three-phase full bridge, one end of L2, L3, the other end of L1, L2, L3 connects one end of C1, C2, C3 respectively and is regarded as the alternating current end of three-phase two-level full bridge converter, and the other section of C1, C2, C3 links together and is regarded as the mid point of high frequency filtering.
Fig. 6 shows an embodiment of the power lithium battery system of the present invention, where the power lithium battery system (3) includes a lithium battery stack (33) and a battery management system (34), the lithium battery stack (33) is formed by connecting a series of lithium battery cells with the same capacity in series and connecting fuses in series with the positive electrode or the negative electrode, the battery management system (34) includes a series of terminals respectively connected between the positive electrode and the negative electrode of each lithium battery cell, the N lithium battery cells are connected in series, and a total of n+1 positive and negative electrodes are connected to the battery management system (34), and the battery management system (34) collects the voltages of the lithium battery cells through the terminals and uploads the voltage information through the communication ports.
Claims (7)
1. The utility model provides a four-quadrant energy storage type static change power supply, includes charge and discharge select switch (1), four-quadrant converter (2), power lithium battery system (3), intermediate frequency transformer (4), charge and discharge select switch (1) are double throw switch, include power frequency mains supply input (11), intermediate frequency static change output (12), converter interface end (13) three sets of terminals, 380V/50 Hz's power frequency mains supply is connected to power frequency mains supply input (11) of charge and discharge select switch (1) are used as the charging input terminal, high-voltage side (41) of intermediate frequency transformer (4) are connected to intermediate frequency static change output (12) of charge and discharge select switch (1), low-voltage side (42) of intermediate frequency transformer (4) are as the aircraft power supply's of the dead space of change, alternating current end (21) of four-quadrant converter (2) are connected to converter interface end (13) of charge and discharge select switch (1), direct current end (22) of four-quadrant converter (2) are connected lithium power battery; in a charging mode, the charging and discharging selection switch (1) throws towards the power frequency mains supply input end (11), so that the 380V/50Hz power frequency mains supply is connected to the alternating current side (21) of the four-quadrant converter (2) through the charging and discharging selection switch (1), and the four-quadrant converter works in a rectification mode and has a working state of high power factor and low harmonic current; active power is injected into the power lithium battery system (3), so that the electric quantity of the power lithium battery system (3) gradually increases until the power lithium battery system is full; in a discharging mode, the charging and discharging selection switch (1) throws towards the medium-frequency static change output end (12), the four-quadrant converter (2) works in an inverter mode, namely an active power output quadrant, and outputs medium-frequency voltage of 400V/400Hz, the medium-frequency voltage is applied to the high-voltage side (41) of the medium-frequency transformer (4) through the medium-frequency static change output end (12) of the charging and discharging selection switch (1), the medium-frequency transformer converts the medium-frequency voltage into voltage of 115V/400Hz so as to adapt to the power supply requirement of an airplane, and because the four-quadrant converter (2) can flexibly control output current, the four-quadrant converter can be controlled more accurately according to loads, starting inrush current is avoided, and meanwhile required reactive power and harmonic load capacity can be provided for the airplane loads.
2. The four-quadrant energy-storage type static-change power supply according to claim 1, wherein the charge-discharge selection switch (1) is provided with interlocking logic and is composed of contactors KM1 and KM2 and control contacts Q1 and Q2, and an input terminal U1 of the contactor KM1 is connected with an input terminal U2 of the contactor KM2 and a signal terminal (13 a) in a converter interface end (13) of the charge-discharge selection switch (1); an input terminal V1 of the contactor KM1 is connected with an input terminal V2 of the contactor KM2 and a signal terminal (13 b) in a converter interface end (13) of the charge-discharge selection switch (1); an input terminal W1 of the contactor KM1 is connected with an input terminal W2 of the contactor KM2 and a signal terminal (13 c) in a converter interface end (13) of the charge-discharge selection switch (1); the output ends R1, S1 and T1 of the contactor KM1 are respectively used as signal terminals (11 a), (11 b) and (11 c) of a power frequency mains supply input end (11) of the charge-discharge selection switch (1); the output ends R2, S2 and T2 of the contactor KM2 are respectively used as signal terminals (12 a), (12 b) and (12 c) of a power frequency mains supply input end (12) of the charge-discharge selection switch (1); the control coil of the contactor KM1 is formed by connecting a control contact Q1 and a normally closed contact of the contactor KM2 in series; the control coil of the contactor KM2 is formed by connecting a control contact Q2 and a normally closed contact of the contactor KM1 in series, and through the connection, only one of the KM1 and the KM2 can be closed at most at any moment, so that the direct communication of power frequency commercial power to an intermediate frequency static change output end is avoided.
3. The four-quadrant energy-storage type static-variable power supply according to claim 1, wherein the four-quadrant converter (2) is a three-phase two-level full-bridge converter, and comprises a direct-current side capacitor Cdc, a three-phase full-bridge formed by six IGBTs of Q1/Q2/Q3/Q4/Q5/Q6, and a high-frequency filter circuit formed by L1/C1/L2/C2/L3/C3, the direct-current side capacitor Cdc is connected between an anode 22+ and a cathode 22-of the three-phase full-bridge, collectors of Q1, Q3 and Q5 of the three-phase full-bridge are all connected to an anode 22+ of the three-phase full-bridge, emission stages of Q2, Q4 and Q6 of the three-phase full-bridge are all connected to the cathodes 22-, Q1, Q3 and Q5 of the three-phase full-bridge respectively, the collectors of Q2, Q4 and Q6 are connected to one ends of L1, L2 and L3, the other ends of L1, L2 and L3 are respectively connected to one ends of C1, C2 and C3 as a three-phase full-bridge, and the other two-level full-bridge, and the three-phase full-bridge, C2, and the other full-bridge, the full-bridge, and the full-bridge, have high frequency filter and the high frequency filter circuit, as the high frequency and the power supply and the power.
4. The four-quadrant energy-storage type static power supply according to claim 1, wherein the four-quadrant converter (2) is a three-phase three-level full-bridge converter, and comprises a direct-current side capacitor CX/CY, an A-phase bridge arm formed by 4 IGBTs of Q1a/Q2a/Q3a/Q4a and two diodes of D1a/D2a, a B-phase bridge arm formed by 4 IGBTs of Q1B/Q2B/Q3B/Q4B and two diodes of D1B/D2B, a C-phase bridge arm formed by 4 IGBTs of Q1C/Q2C/Q3C/Q4C and two diodes of D1C/D2C, and a high-frequency filter circuit formed by L1/C1/L2/C2/L3/C3, wherein the positive electrode of the direct-current side capacitor CX is connected with the positive electrode 22+ of the three-phase three-level full-bridge converter, the negative electrode of the direct-current side capacitor CY is connected with the negative electrode 22 of the three-phase three-level full-bridge converter, the cathodes and the anodes of the direct-current side capacitors CX are connected together to serve as the midpoints 22n of the three-phase full bridge, the collectors of Q1a, Q1B and Q1C are connected to the anodes 22+ of the three-phase full bridge, the emitters of Q1a, Q1B and Q1C are respectively connected to the collectors of Q2a, Q2B and Q2C, the emitters of Q2a, Q2B and Q2C are respectively connected to the collectors of Q3a, Q3B and Q3C, the emitters of Q3a, Q3B and Q3C are respectively connected to the collectors of Q4a, Q4B and Q4C, the emitters of Q1a, Q1B and Q1C are connected to the cathodes 22-, of D1a, D1B and D1C are respectively connected to the emitters of Q1a, Q1B and Q1C, the anodes of D2a, D2B and D2C are respectively connected to the emitters of Q3a, Q3B and Q3C, the anodes of D1a, D1B and D2C are respectively connected to the collectors of the three-phase full bridge, the cathodes 22n of Q1a, Q1B and Q1C are respectively connected to the cathodes 22n of the three-phase full bridge, one end of L2, L3, the other end of L1, L2, L3 connects one end of C1, C2, C3 respectively and is regarded as the alternating current end of three-phase two-level full bridge converter, and the other section of C1, C2, C3 links together and is regarded as the mid point of high frequency filtering.
5. The four-quadrant energy-storage type static-change power supply according to claim 1, wherein the power lithium battery system (3) comprises a lithium battery electric pile (33) and a battery management system (34), the lithium battery electric pile (33) is formed by connecting a series of lithium battery electric cores with the same capacity in series and is connected with a fuse in series at the positive electrode or the negative electrode, the battery management system (34) comprises a series of terminals respectively connected between the positive electrode and the negative electrode of each lithium battery electric core, the N lithium battery electric cores are connected in series, and total n+1 positive electrode and negative electrode are connected to the battery management system (34), and the battery management system (34) collects the voltage of each lithium battery electric core through the terminals and uploads the voltage information through a communication port.
6. The four-quadrant energy storage type static change power supply according to claim 1, wherein the intermediate frequency transformer (4) is made of an amorphous alloy iron core, and the practical magnetic flux density of the amorphous alloy is 0.5-1.0 tesla.
7. The four-quadrant energy storage type static variable power supply according to claim 1, wherein the intermediate frequency transformer (4) is manufactured by adopting an oriented silicon steel sheet iron core with the thickness not exceeding 0.2mm, and the practical magnetic flux density of the silicon steel sheet is not exceeding 0.8 tesla in order to reduce the high-frequency loss of the iron core.
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| CN104065157A (en) * | 2014-06-09 | 2014-09-24 | 深圳微网能源管理系统实验室有限公司 | Uninterruptible power supply with improved power supply reliability |
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| CN102025182B (en) * | 2010-11-30 | 2012-10-31 | 梁一桥 | Modular charging/discharging system of power battery pack of multifunctional electromobile |
| CN102244382A (en) * | 2011-06-22 | 2011-11-16 | 辽宁荣信众腾科技有限公司 | Novel power unit for light DC power transmission equipment |
| CN204089313U (en) * | 2014-09-12 | 2015-01-07 | 杭州得康蓄电池修复仪有限公司 | Discharge and recharge change-over circuit and battery charging and discharging management circuit |
| CN105429183A (en) * | 2016-01-06 | 2016-03-23 | 河海大学 | Permanent magnetic direct-drive type offshore wind power plant grid-connected system topology structure and control method thereof |
| CN107565588A (en) * | 2017-10-19 | 2018-01-09 | 上海航天电源技术有限责任公司 | A kind of quiet variable power source system of portable airport ground |
| CN110844105A (en) * | 2019-12-12 | 2020-02-28 | 四川航电微能源有限公司 | Electric power-assisted towing integrated aircraft ground power supply control system and method |
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