CN207835143U - Energy storage device of photovoltaic power generation system - Google Patents
Energy storage device of photovoltaic power generation system Download PDFInfo
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- CN207835143U CN207835143U CN201820294947.1U CN201820294947U CN207835143U CN 207835143 U CN207835143 U CN 207835143U CN 201820294947 U CN201820294947 U CN 201820294947U CN 207835143 U CN207835143 U CN 207835143U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 52
- 238000010248 power generation Methods 0.000 title abstract description 4
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The embodiment of the utility model provides a photovoltaic power generation system energy memory is related to, including connecting in parallel two energy storage modules between photovoltaic power generation system's direct current generating line and data processor, two energy storage modules all include electric power storage unit and charge-discharge controller, and one of them energy storage module's electric power storage unit is the battery, and another energy storage module's electric power storage unit is ultracapacitor system, and charge-discharge controller includes: the bidirectional DC/DC main circuit is used for receiving the electric energy of the direct current bus according to the driving signal to charge the electric storage unit or outputting the electric energy of the electric storage unit to the direct current bus; the voltage and current sampling filter circuit is used for sampling voltage and current parameters of the electric storage unit and outputting sampling data; the electric storage unit protection circuit is used for generating an electric storage unit protection control signal when the sampling data exceeds a preset threshold value; and the driving circuit is used for generating a driving signal according to the control instruction of the data processor and the protection control signal of the electric storage unit to control the working state of the bidirectional DC/DC main circuit.
Description
Technical field
The utility model embodiment is related to technical field of photovoltaic power generation more particularly to a kind of photovoltaic generating system energy storage dress
It sets.
Background technology
Solar energy is the important alternative energy source of traditional fossil energy as a kind of Novel clean, regenerative resource.Light
Photovoltaic generating system is the common form using solar energy, and photovoltaic generating system is mainly by solar panel component, controller, inversion
Device and energy storage device several major composition.
Since photovoltaic generation is influenced by weather bigger, and there is unstability, so, corresponding energy storage device seems outstanding
To be important, moreover, with the rapid development of photovoltaic generating system and the increase of the various equipment with impact power, it is right
More stringent requirements are proposed for the energy storage device of photovoltaic generating system.
The photovoltaic generating system of early stage is mainly using various types of accumulators as energy storage device, storage battery energy density
Greatly, but also there is power density small, efficiency for charge-discharge is low, and cycle life is short, sensitive to charge and discharge process, high-power charge and discharge and frequency
The defects of adaptability of numerous charge and discharge is not strong.
Utility model content
The utility model embodiment technical problems to be solved are, provide a kind of photovoltaic generating system energy storage device, energy
More effectively management of battery and ultracapacitor realize efficient assistance work.
In order to solve the above technical problems, the utility model embodiment provides the following technical solutions：A kind of photovoltaic generating system
Energy storage device, including two energy-storage modules being parallel between the DC bus of photovoltaic generating system and data processor, it is described
Two energy-storage modules include can charge and discharge electricity accumulating unit and charge and discharge for controlling the electricity accumulating unit charge and discharge it is automatically controlled
The electricity accumulating unit of device processed, one of energy-storage module is accumulator, and the electricity accumulating unit of another energy-storage module is super capacitor
Device, the charging-discharging controller include：
Two-way DC/DC main circuits, are connected to electricity accumulating unit and the DC bus, to receive direct current mother according to drive signal
The electric energy of line input carries out charging to electricity accumulating unit or exports the electric energy of electricity accumulating unit to DC bus；
Voltage and current wave filtering circuit is connected to electricity accumulating unit and the data processor, for electricity accumulating unit
Voltage and current parameter sampled and export sampled data；
Electricity accumulating unit protects circuit, is connected to voltage and current wave filtering circuit to obtain the sampled data and sentence
Disconnected determine generates electricity accumulating unit protection control signal when the sampled data exceeds predetermined threshold；And
Driving circuit is connected to the two-way DC/DC main circuits, electricity accumulating unit protection circuit and the data processing
Device, for generating drive signal control according to the control instruction of the data processor and electricity accumulating unit protection control signal
Make the working condition of two-way DC/DC main circuits.
Further, the two-way DC/DC main circuits are BOOST/BUCK step-up/step-down circuits.
Further, the voltage and current wave filtering circuit includes again：
The voltage sample filter circuit of harmonic wave is sampled and filtered out for the voltage parameter to electricity accumulating unit；And
The current sample filter circuit of harmonic wave is sampled and filtered out for the current parameters to electricity accumulating unit.
Further, the electricity accumulating unit protection circuit includes：
Over under-voltage protection circuit is used in electricity accumulating unit charging process, when the voltage parameter in sampled data is overvoltage
Overvoltage protection signal is generated when state and so that the two-way DC/DC main circuits is stopped by the driving circuit, and is stopped
Charging to electricity accumulating unit, and be used in electricity accumulating unit discharge process, when the current parameters in sampled data are under-voltage shape
UVP signal is generated when state and so that the two-way DC/DC main circuits is stopped by the driving circuit, and makes electric power storage
Unit stops electric discharge；And
Current foldback circuit generates overcurrent when meeting or exceeding predetermined threshold for the current parameters in sampled data and protects
Shield signal simultaneously makes the two-way DC/DC main circuits be stopped by the driving circuit, and the charge and discharge for disconnecting electricity accumulating unit are returned
Road.
Further, the energy storage device further includes accessory power supply, the accessory power supply respectively with the data processor
It is connected with driving circuit, is drive circuitry under the control of data processor.
Further, the topological structure of the accessory power supply is inverse-excitation type switch power-supply.
After adopting the above technical scheme, the utility model embodiment at least has the advantages that：The utility model is real
It applies example accumulator and ultracapacitor are applied in combination, makes storage battery energy density greatly and ultracapacitor power density is big, follows
The features such as ring long lifespan, is combined, and energy storage device performance is increased dramatically.Moreover, passing through voltage and current wave filtering circuit
The voltage and current parameter of acquisition electricity accumulating unit is supplied to electricity accumulating unit protection circuit and data processing as sampled data in real time
Device, electricity accumulating unit protection circuit and data processor provide corresponding control signal after being judged respectively according to sampled data again
To driving circuit, the charge or discharge that two-way DC/DC main circuits realize electricity accumulating unit are finally controlled by driving circuit.Integrated circuit
Simple for structure and control is accurate, can effectively keep the stability of rectilinear generatrix supplying power for outside.
Description of the drawings
Fig. 1 is the system principle schematic diagram of one embodiment of the utility model photovoltaic generating system energy storage device.
Fig. 2 is that the circuit theory of the charging-discharging controller of one embodiment of the utility model photovoltaic generating system energy storage device is shown
It is intended to.
Fig. 3 is the circuit knot of the two-way DC/DC main circuits of one embodiment of the utility model photovoltaic generating system energy storage device
Structure schematic diagram.
Fig. 4 is the circuit knot of the voltage sample filter circuit of one embodiment of the utility model photovoltaic generating system energy storage device
Structure schematic diagram.
Fig. 5 is the circuit knot of the current sample filter circuit of one embodiment of the utility model photovoltaic generating system energy storage device
Structure schematic diagram.
Fig. 6 is the circuit structure of the over under-voltage protection circuit of one embodiment of the utility model photovoltaic generating system energy storage device
Schematic diagram.
Fig. 7 is that the circuit structure of the current foldback circuit of one embodiment of the utility model photovoltaic generating system energy storage device shows
It is intended to.
Fig. 8 is the circuit structure signal of the driving circuit of one embodiment of the utility model photovoltaic generating system energy storage device
Figure.
Fig. 9 is the circuit structure signal of the accessory power supply of one embodiment of the utility model photovoltaic generating system energy storage device
Figure.
Specific implementation mode
The application is described in further detail in the following with reference to the drawings and specific embodiments.It should be appreciated that signal below
Property embodiment and explanation be only used for explaining the application, be not intended as the restriction to the application, moreover, in the absence of conflict,
The features in the embodiments and the embodiments of the present application can be combined with each other.
As shown in Figure 1, the utility model embodiment provides a kind of photovoltaic generating system energy storage device, including it is parallel to photovoltaic
Two energy-storage modules 1,2 between the DC bus 3 and data processor 4 of electricity generation system, described two energy-storage modules 1,2 wrap
Include can charge and discharge electricity accumulating unit and charging-discharging controller for controlling the electricity accumulating unit charge and discharge, one of energy storage
The electricity accumulating unit of module 1 is accumulator 10, and the electricity accumulating unit of another energy-storage module 2 is ultracapacitor 20, belongs to two
The circuit structure and control principle of the charging-discharging controller 12,22 of a energy-storage module 1,2 are identical, to avoid repeating retouching
It states, its structure and working principle is only described in detail by taking charging-discharging controller 12 as an example below.
As shown in Fig. 2, the charging-discharging controller 12 includes：
Two-way DC/DC main circuits 120 are connected to the DC bus 3 of electricity accumulating unit and photovoltaic generating system, with according to driving
The electric energy that signal receives the input of DC bus 3 carries out charging to electricity accumulating unit or exports the electric energy of electricity accumulating unit to direct current mother
Line 3；
Voltage and current wave filtering circuit 122 is connected to the data processor 4 of electricity accumulating unit and photovoltaic generating system,
It is sampled for the voltage and current parameter to electricity accumulating unit and exports sampled data；
Electricity accumulating unit protects circuit 124, is connected to voltage and current wave filtering circuit 122 to obtain the sampled data
And electricity accumulating unit protection control signal is generated when judging to determine that the sampled data exceeds predetermined threshold；And
Driving circuit 126 is connected to the two-way DC/DC main circuits 120, electricity accumulating unit protection circuit 124 and institute
Data processor 4 is stated, for generating drive according to the instruction of the data processor 4 and electricity accumulating unit protection control signal
Dynamic signal controls the working condition of two-way DC/DC main circuits 120.
Accumulator 10 and ultracapacitor 20 are applied in combination the utility model embodiment, keep 10 energy density of accumulator big
With 20 power density of ultracapacitor it is big, have extended cycle life the features such as be combined, energy storage device performance is increased dramatically.And
And the voltage and current parameter for acquiring electricity accumulating unit in real time by voltage and current wave filtering circuit 122 is used as sampled data
It is supplied to electricity accumulating unit protection circuit 124 and data processor 4, electricity accumulating unit protection circuit 124 and data processor 4 to distinguish again
Corresponding control signal is provided after being judged according to sampled data to driving circuit 126, is finally controlled by driving circuit 126 double
The charge or discharge of electricity accumulating unit are realized to DC/DC main circuits 120.Integrated circuit is simple for structure and control is accurate, can be effectively
Keep the stability of rectilinear generatrix supplying power for outside.
In one alternate embodiment, the two-way DC/DC main circuits 120 are non-isolation type bidirectional DC/DC translation circuits,
Preferably use BOOST/BUCK step-up/step-down circuits.The present embodiment is by using BOOST/BUCK step-up/step-down circuits as two-way
DC/DC main circuits 120 can easily realize control to maintain the stabilization of busbar voltage, such as：Busbar voltage can be maintained
In the 48V being normally set up.
In a specific embodiment, the particular circuit configurations of the two-way DC/DC main circuits 120 can be as shown in Figure 3.
BOOST/BUCK step-up/step-down circuits can be considered as the synthesis of BOOST booster circuits and BUCK reduction voltage circuits.Due to DC bus electricity
Pressure is more than electricity accumulating unit terminal voltage, so when charging, energy flows to electricity accumulating unit by DC bus side voltage, controls reduction voltage circuit
In metal-oxide-semiconductor Q9（As shown in Figure 3）It realizes；When electric discharge, energy is controlled from electricity accumulating unit effluent to DC bus in booster circuit
Metal-oxide-semiconductor Q10（As shown in Figure 3）It realizes.
When charging to electricity accumulating unit, circuit is BUCK reduction voltage circuits.In conjunction with shown in Fig. 3, metal-oxide-semiconductor Q7, metal-oxide-semiconductor Q8 locate always
In conducting state, diode D7 is constantly in cut-off state, when the drive signal G3 of driving circuit output is high level, MOS
Pipe Q9 conductings, diode D2 cut-offs, bus current flow through metal-oxide-semiconductor Q9, inductance L1 and charge to electricity accumulating unit and output capacitance, simultaneously
First inductance L1 energy storage.When G3 is low level, the Q9 cut-offs of third metal-oxide-semiconductor, the first diode D1, the 4th metal-oxide-semiconductor Q10 conductings are continuous
Stream, the first inductance L1, output capacitance electric discharge continue to charge a battery.
When battery discharging, circuit is BOOST booster circuits.First metal-oxide-semiconductor Q7, the second constantly on states of metal-oxide-semiconductor Q8,
Third metal-oxide-semiconductor Q9, the second diode D2 cut-off state always, when U2 low-side drive signals G4 is high level, electricity accumulating unit is just
Pole returns to electricity accumulating unit cathode through inductance L1, metal-oxide-semiconductor Q10, at this time inductance L1 energy storage.When drive signal G4 is low level, MOS
Pipe Q10 cut-offs, electricity accumulating unit anode are connected to metal-oxide-semiconductor Q7 on busbar again through inductance L1 to diode D1, realize boosting.
In one alternate embodiment, the voltage and current wave filtering circuit 122 includes again：
The voltage sample filter circuit of harmonic wave is sampled and filtered out for the voltage parameter to electricity accumulating unit；And
The current sample filter circuit of harmonic wave is sampled and filtered out for the current parameters to electricity accumulating unit.
By the way that voltage sample filter circuit and current sample filter circuit is respectively set, electricity accumulating unit can be delicately obtained
Voltage and current situation of change, so as to rapidly according to sampled data progress automatically control operation accordingly so that directly
The output voltage of line busbar maintains to stablize, and the safety of energy storage device can be effectively ensured.
Fig. 4 show the circuit structure signal of the voltage sample filter circuit at the electricity accumulating unit end in a specific embodiment
Figure, this circuit includes operational amplifier U10-A, U10-B, resistance R47, R48, R117, R120, capacitance C19, C20, C21.This electricity
Road samples to obtain sampled voltage VBAT through resistance R117, R120, sampled voltage VBAT is through circuit R48, R47 in actual motion
3 feet of operational amplifier U10-A are connected to, 3 feet are grounded through capacitance C20 again.The indirect capacitance C19 of resistance R48, R47 are put to operation
1 foot of big device U10-A.1 foot of operational amplifier U10-A meets 2 feet and operational amplifier U10-B5 feet, operational amplifier U10-A4
Foot is grounded, and 8 feet connect 5V power supplys, and 7 feet of operational amplifier U10-B connect 6 feet.It is put by resistance R47, R48, capacitance C19, C20, operation
Big device U10-A constitutes the second-order low-pass filter that gain is 1, filters out harmonic wave.Operational amplifier U10-B is voltage follower.
Fig. 5 show the circuit structure signal of the current sample filter circuit at the electricity accumulating unit end in a specific embodiment
Figure, the current sample filter circuit include Hall current sampling element U15, operational amplifier U24-A, U24-B, resistance R91,
R118, R119, capacitance C36, C37, C38, C57, C58, C59.
1,2 feet of Hall current sampling element U15 connect the source electrode of metal-oxide-semiconductor Q8, and 3,4 feet connect accumulator, 5 feet ground connection, and 6 feet connect
Capacitance C37,7 foot connecting resistance R91,8 feet connect 5V power supplys.It samples to obtain sampled voltage VIN1 through Hall current sampling element U15,
VIN1 is connected to 3 feet of operational amplifier U24-A through resistance R119, R118, and 3 foot is grounded through capacitance C58 again.Resistance R119 with
1 foot of the indirect capacitance C57 to operational amplifier U24-A of R118.1 foot of operational amplifier U24-A also connects 2 feet and operation amplifier
5 feet of device U24-V, the 4 feet ground connection of operational amplifier U24-A, 8 feet connect 5V power supplys.7 feet of operational amplifier U24-B connect 6 feet.
The second-order low-pass filter that gain is 1 is constituted by resistance R118, R119, capacitance C57, C58, operational amplifier U24-A, is filtered out humorous
Wave.Operational amplifier U24-B is voltage follower.
In another alternative embodiment, the electricity accumulating unit protection circuit 124 includes：
Over under-voltage protection circuit is used in electricity accumulating unit charging process, when the voltage parameter in sampled data is overvoltage
Overvoltage protection signal is generated when state and so that the two-way DC/DC main circuits is stopped by the driving circuit, and is stopped
Charging to electricity accumulating unit, and be used in electricity accumulating unit discharge process, when the current parameters in sampled data are under-voltage shape
UVP signal is generated when state and so that the two-way DC/DC main circuits is stopped by the driving circuit, and makes electric power storage
Unit stops electric discharge；And
Current foldback circuit generates overcurrent when meeting or exceeding predetermined threshold for the current parameters in sampled data and protects
Shield signal simultaneously makes the two-way DC/DC main circuits be stopped by the driving circuit, and the charge and discharge for disconnecting electricity accumulating unit are returned
Road.
The present embodiment, can be rapidly according to hits by the way that over under-voltage protection circuit and current foldback circuit is respectively set
The situation of change of voltage parameter and current parameters in automatically generates corresponding protection signal and then realizes corresponding control behaviour
Make so that the output voltage of rectilinear generatrix maintains to stablize, and the safety of energy storage device can be effectively ensured.
Fig. 6 show the electrical block diagram of the over under-voltage protection circuit of the electricity accumulating unit in a specific embodiment.
The over under-voltage protection circuit includes voltage comparator U7-A, U7-B, double D trigger U11, reset chip U19, zener diode
D8, D9, diode D11, D12, potentiometer R35, R38, resistance R36R37R39 etc., capacitance C15, C22, C44, light emitting diode
D13、D14。
The sampled voltage VBAT of electricity accumulating unit is connected on No. 3 and the voltage of voltage comparator U7-A through resistance R36, R37 respectively
No. 6 pins of comparator U7-B.No. 2 pins of voltage comparator U7-A are connected between resistance R40 and potentiometer R35.Voltage ratio
No. 5 pins compared with device U7-B are connected between resistance R41 and potentiometer R38.No. 1 pin of voltage comparator U7-A connects pull-up resistor
R42, connecting resistance R39 connect two pole of voltage stabilizing through light emitting diode D13 to ground, No. 3 pins of connecting resistance R57 to double D trigger U11
Pipe D9.No. 7 pins of voltage comparator U7-B connect pull-up resistor R43, and connecting resistance R50 is grounded through light emitting diode D14, connecting resistance
No. 11 pins of R58 to double D trigger U11, meet zener diode D8.1 foot of reset chip U19 is grounded, and 2 feet connect double D triggerings
1 foot of device U11,3 feet connect NPN triode D42 collectors, connect 5V power supplys.NPN triode D42 base stages meet processor CPU.Double D are touched
2,4,10, No. 12 feet of hair device U11 connect 5V power supplys through resistance respectively.5, No. 9 feet of double D trigger U11 are respectively through diode
D11, D12 are to driving circuit.
When the sampled voltage VBAT of electricity accumulating unit is more than No. 2 foot voltage of voltage comparator U7-A, electricity accumulating unit was
Pressure condition.No. 1 foot of voltage comparator U7-A exports high level, and light emitting diode D9 is bright, and No. 3 feet of double D trigger U11 are by low
Level becomes high level, and 5 feet of double D trigger U11 export high level, diode D11 conductings, and the signal of driving circuit output becomes
For high level, the output of shutdown drive signal G3, G4, main circuit is stopped, and stopping continues to charge to electricity accumulating unit, realization pair
The overvoltage protection of electricity accumulating unit.After overvoltage protection, if you need to make electricity accumulating unit externally discharge, base of the processor to NPN triode D42
High level, triode D42 conductings, 3 feet of reset chip U19 are low level, and 2 feet of reset chip U19 are become from high level
1 foot of low level, voltage comparator U7-A also becomes low level, voltage comparator U7-A output valves zero, i.e. double D trigger U11
5 feet, 9 feet output be 0, main circuit can restore to work normally.If No. 6 foot voltages of voltage comparator U7-B are less than No. 5 foot electricity
It is storage battery under-voltage state when pressure.No. 7 feet of voltage comparator U7-B export high level, and light emitting diode D14 is bright, double D triggerings
No. 11 feet of device U11 become high level from low level, and No. 9 feet of double D trigger U11 export high level, and diode D12 is connected,
Driving circuit exports high level, and driving circuit turns off the output of drive signal G3, G4, and main circuit is stopped, and electricity accumulating unit stops
It only discharges, realizes under-voltage protection.After under-voltage protection, if you need to charge again to electricity accumulating unit, to the high electricity of base stage of NPN triode D42
Flat, triode D42 conductings, 3 feet of reset chip U19 are low level, and 2 feet of reset chip U19 become low level from high level,
1 foot of voltage comparator U7-A also becomes low level, voltage comparator U7-A output valves zero, i.e. 5 feet of double D trigger U11,9
Foot output is 0, and main circuit can restore to work normally.If the sampled voltage VBAT of electricity accumulating unit is less than the 2 of voltage comparator U7-A
Foot, when being more than the 5 foot voltage of voltage comparator U7-B, voltage comparator U7-A 1, the output of 7 feet of voltage comparator U7-B it is low
Level, main circuit normal work.
Fig. 7 show the electrical block diagram of the current foldback circuit of the electricity accumulating unit in an alternative embodiment, institute
State overcurrent protection circuit include voltage comparator U4-A, U4-B, double D trigger U8, reset chip U21, diode D7, D17,
D18, zener diode D6, D23, light emitting diode D16, D22, potentiometer R103, resistance R15, R16, R17 etc., capacitance C16,
C17, C18 etc..
Electricity accumulating unit inflow and outflow electric current is through Hall current sampling element U15 sampling output sampled value VIN1, and VIN1 is through electricity
Resistance R44 is connected to 3 feet of voltage comparator U4-A.2 feet of voltage comparator U4-A and 6 feet of voltage comparator U4-B are connected on resistance
Between R15, R103.1 foot of voltage comparator U4-A connects pull-up resistor R16.Parallel resistance after resistance R17 series diodes D7
R18 is connected between 1 foot of voltage comparator U4-A and 5 feet of voltage comparator U4-B.5 foot meridian capacitors of voltage comparator U4-B
C16 is grounded.7 feet of voltage comparator U4-B connect pull-up resistor R21 to 12V power supplys, meet feedback resistance R19 to 5 feet, connect current limliting electricity
R22 to light emitting diode D16 is hindered, meets zener diode D6,3 feet and 11 feet of connecting resistance R45 to double D trigger U8 connect two poles
Pipe D17 is to driving circuit.1 foot of reset chip U21 is grounded, and 2 feet connect 1 foot and 13 feet of double D trigger U8, and 3 feet, which connect, to be stirred out
U9 is closed, 4 feet connect 5v power supplys.2 feet of double D trigger U8 are connected to 8 feet through resistance R64, and 4 feet and 10 feet are respectively through resistance R56, R112
5V power supplys are connected to, 5 feet are connected to 12 feet through resistance R63, and 6 feet are hanging, and 7 feet ground connection, 9 feet distinguish connecting resistance R52 to light emitting diode
D22 is grounded, and is met zener diode D23 and is grounded through resistance R46, meets diode D18 to driving circuit, 14 feet connect 5V power supplys.
Diode D6 is 5V voltage-stabiliser tubes, is 5V when 7 feet being made to export high level.Diode D17 plays the role of reverse-filling.It shines
Diode D16 is overcurrent indicator light.VIN1 is Hall current sampling element U15 sampling and outputting voltages, through resistance R44, capacitance C18
The noninverting input of voltage comparator U4-A pins 3 is input to after the low-pass filtering of composition, by resistance R15 and potentiometer R103 shapes
The reverse input end of 2 feet of voltage comparator U4-A is input at reference voltage.When VIN1 is more than 2 feet of voltage comparator U4-A
Reference voltage when, 1 foot exports high level, and electric current quickly gives capacitance C16 to charge through low resistance R16, R17, diode D7, capacitance
C16 voltages rise, and when the reference voltage of 6 feet of the voltage more than voltage comparator U4-B, 7 feet export high level, light-emitting diodes
Pipe D16 shines, cue circuit overcurrent, while to the controlling switch high level of driving circuit, turning off the output of PWM, then metal-oxide-semiconductor
Q4, Q5 are turned off, and circuit is without output.For main circuit without output, Hall current sampling element U15 output sampled values VIN1 is 0.Voltage ratio
No. 3 pin noninverting input voltages compared with device U4-A are less than reversed input voltage, and 1 pin becomes low level.The big resistance of capacitance C16
R18 slowly discharges, and when 5 pin voltages are less than 6 pin voltage, 7 pins export low level, and LED extinguishes, the control of driving circuit
Foot processed is low level, and driving circuit can rapidly switch off in output pwm signal, circuit realization again, and be delayed self-starting.
When voltage comparator U4-B No. 7 pins export high level when, i.e., main circuit first time overcurrent when, double D trigger
No. 3 of U8 and No. 11 CP pins become high level by low level, and No. 5 pins become high level, No. 1 and No. 9 pins by low level 0
It is so low level 0.When circuit restores normal, No. 3 pins and No. 11 pins of double D trigger U8 become low level again, and No. 5 and
The output state of No. 9 pins is constant.When there is second of overcurrent, the overcurrent protection that voltage comparator U4-A, U4-B are constituted is electric
Road is consistent with foregoing description.And No. 3 of double D trigger U8 and No. 11 CP pins become high level from low level, No. 5 pins are appointed right
For high level, but No. 9 pins become high level, and LED overcurrent indicator lights are bright, and the output end of driving circuit is high level, turns off PWM
Output, main circuit no current output.Since double D trigger U8 is rising edge flip-flops, No. 3 and No. 11 pins are only detected
When becoming high level from low level, No. 5 and No. 9 pin output states can just change, so No. 9 pins are always maintained at high electricity
It is flat.Circuit can not self-starting again, i.e., main circuit occur second of overcurrent when, circuit is unable to self-starting, waits for that hand inspection circuit is
No failure needs manual reset after debugging.This purpose be after there is short circuit in circuit in order to prevent circuit also constantly from opening
It is dynamic.Reset switch U9 is grounded 3 feet of reset chip U21, and 2 feet of reset chip U21 export low level, i.e. double D trigger U8
No. 1 and No. 13 pins become low level, 5 foot, the 7 foot output of double D trigger U8 is 0, you can realizes the reset of chip.
It is the electrical block diagram of the driving circuit in an alternative embodiment shown in Fig. 8, driving circuit 1 includes driving
Chip U2, capacitance C3, C5, C8, C10, C31, diode D3, D4, D5, resistance R3, R5, R6, R59, zener diode D28,
D29, D32, D33, wherein driving chip U2 is a kind of high-voltage high-speed power MOSFET driver, there is independent high-end and low side
Output driving channel includes input/output logic circuit, level shift circuit, output driving circuit under-voltage protection and bootstrapping
The parts such as circuit.
The logical circuit power voltage end of driving chip U2（9th pin）Connect power vd D, the positive and negative electrode point of capacitance C3
It is not connected to the logic circuit ground terminal of power vd D and driving chip U2（13rd pin）, the low side fixed power source of driving chip U2
Voltage end（3rd pin）It is connected to external accessory power supply VCC, accessory power supply VCC is connected to driving chip by diode D5
The high-end floating power voltage terminal of U2（6th pin）, the positive and negative electrode of capacitance C8, C10 is respectively connected to the high-end of driving chip U2
Floating power voltage terminal（6th pin）With high-end floating power supply offset voltage end（5th pin）, the anode connection of capacitance C5, C31
In the low side fixed power source voltage end of driving chip U2（3rd pin）, the cathode ground connection of capacitance C5, C31, the public affairs of driving chip U2
End altogether（2nd pin）Ground connection, the high channel output end of driving chip U2（7th pin）It is connected to metal-oxide-semiconductor Q1's by resistance R6
Grid, the low channel output end of driving chip U2（1st pin）The grid of metal-oxide-semiconductor Q2 is connected to by resistance R59；Processor
First output end is two, is respectively connected to the high channel input terminal of driving chip U2（10th pin）With low path input
（12nd pin）.
Capacitance C8, C10 are bootstrap capacitors.The high channel input terminal of driving chip U2（10th pin）With low path input
（12nd pin）Incoming level be 0 to the pwm signal between 3.3V.Apply driving chip U2's in BUCK reduction voltage circuits
High-side driver.When normal work, metal-oxide-semiconductor Q1 cut-offs, i.e. the high channel input terminal of driving chip U2（10th pin）Receive level
For low level when, source potential is close to ground potential, power supply VCC（+ 12VCC power supplys）Charging to bootstrap capacitor C8, C10 be
It is carried out during the conducting of afterflow diode D2, makes the voltage on capacitance C8, C10 close to the+12VCC of accessory power supply VCC.Work as driving
The high channel input terminal of chip U2（10th pin）When receiving level becomes high level, metal-oxide-semiconductor Q1 is connected and diode D2 cut-offs
When, capacitance C8, C10 boot, and storage charge provides power supply for the high-side driver output of U2 on capacitance C8, C10, and main circuit is at this time
Metal-oxide-semiconductor Q1, inductance L1, capacitance C1, C2 form basic BUCK reduction voltage circuits.
The low side driving of driving chip U2 is applied when inductance afterflow.According to the characteristic of MOS, grid step voltage is more than certain
Value will be connected, and be suitable for the case where when source electrode is grounded (low side driving).
In an alternative embodiment of the utility model, the energy storage device further includes accessory power supply, the auxiliary electricity
Source is connected with the data processor and driving circuit respectively, is drive circuitry under the control of data processor.Pass through
Accessory power supply is set so that the supply of electric power of data processor and driving circuit is more stable reliable, improves energy storage device
Stability.
It is the electrical block diagram of the accessory power supply in the utility model one embodiment, topological structure shown in Fig. 9
Preferably inverse-excitation type switch power-supply.The resistance R1001 of the auxiliary power circuit is start-up resistor, and error amplification is added to after decompression
The feeder ear of device U45（7 feet）, provide startup voltage for error amplifier U45, transformer T1 windings 3,4 is whole after circuit start
On the one hand stream filtering voltage provides normal working voltage for error amplifier U45, be on the other hand added to through resistance R93, R94 partial pressure
2 foot of inverting input of error amplifier U45 provides negative feedback voltage for error amplifier U45, and rule is that this foot voltage is got over
The duty ratio of high driving pulse is smaller, is stabilized the output voltage with this.The external resistance R95 of 4 feet and 8 feet of error amplifier U45,
Capacitance C108 determines frequency of oscillation, and the maximum value of frequency of oscillation is up to 500KHz.Resistance R92, capacitance C106 are for improving
Gain and frequency characteristic.The square-wave signal of the 6 feet output of error amplifier drives MOSFEF power after resistance R96, R97 partial pressure
Pipe, the energy transmission of transformer T1 primary side windings 1,2 export 15V DC voltages to each winding in secondary side, after rectified filtering and are used for
Drive metal-oxide-semiconductor Q7, Q8.Resistance R99 is used for current detecting, and error amplifier U45 is sent into after resistance R102, capacitance C117 filter filters
3 feet formed current feedback ring.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are limited by appended claims and its equivalency range.
Claims (6)
1. a kind of photovoltaic generating system energy storage device, which is characterized in that including be parallel to photovoltaic generating system DC bus and
Two energy-storage modules between data processor, described two energy-storage modules include can charge and discharge electricity accumulating unit and be used for
The charging-discharging controller of the electricity accumulating unit charge and discharge is controlled, the electricity accumulating unit of one of energy-storage module is accumulator, and another
The electricity accumulating unit of one energy-storage module is ultracapacitor, and the charging-discharging controller includes：
Two-way DC/DC main circuits, are connected to electricity accumulating unit and the DC bus, defeated to receive DC bus according to drive signal
The electric energy entered carries out charging to electricity accumulating unit or exports the electric energy of electricity accumulating unit to DC bus；
Voltage and current wave filtering circuit is connected to electricity accumulating unit and the data processor, for the electricity to electricity accumulating unit
Pressure and current parameters are sampled and export sampled data；
Electricity accumulating unit protects circuit, is connected to voltage and current wave filtering circuit to obtain the sampled data and judge really
The fixed sampled data generates electricity accumulating unit protection control signal when exceeding predetermined threshold；And
Driving circuit is connected to the two-way DC/DC main circuits, electricity accumulating unit protection circuit and the data processor,
For generating drive signal control according to the control instruction of the data processor and electricity accumulating unit protection control signal
The working condition of two-way DC/DC main circuits.
2. photovoltaic generating system energy storage device as described in claim 1, which is characterized in that the two-way DC/DC main circuits are
BOOST/BUCK step-up/step-down circuits.
3. photovoltaic generating system energy storage device as described in claim 1, which is characterized in that the voltage and current sampling filter
Circuit includes again：
The voltage sample filter circuit of harmonic wave is sampled and filtered out for the voltage parameter to electricity accumulating unit；And
The current sample filter circuit of harmonic wave is sampled and filtered out for the current parameters to electricity accumulating unit.
4. photovoltaic generating system energy storage device as described in claim 1, which is characterized in that the electricity accumulating unit protects circuit packet
It includes：
Over under-voltage protection circuit is used in electricity accumulating unit charging process, when the voltage parameter in sampled data is overvoltage condition
When generate and overvoltage protection signal and so that the two-way DC/DC main circuits is stopped by the driving circuit, and stop to storing
The charging of electric unit, and be used in electricity accumulating unit discharge process, when the current parameters in sampled data are under-voltage condition
It generates UVP signal and so that the two-way DC/DC main circuits is stopped by the driving circuit, and make electricity accumulating unit
Stop electric discharge；And
Current foldback circuit generates overcurrent protection letter when meeting or exceeding predetermined threshold for the current parameters in sampled data
Number and so that the two-way DC/DC main circuits is stopped by the driving circuit, disconnect the charging and discharging circuit of electricity accumulating unit.
5. photovoltaic generating system energy storage device as described in claim 1, which is characterized in that the energy storage device further includes auxiliary
Power supply, the accessory power supply are connected with the data processor and driving circuit respectively, are drive under the control of data processor
Dynamic circuit power supply.
6. photovoltaic generating system energy storage device as claimed in claim 5, which is characterized in that the topological structure of the accessory power supply
For inverse-excitation type switch power-supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820294947.1U CN207835143U (en) | 2018-03-02 | 2018-03-02 | Energy storage device of photovoltaic power generation system |
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|---|---|---|---|
| CN201820294947.1U CN207835143U (en) | 2018-03-02 | 2018-03-02 | Energy storage device of photovoltaic power generation system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462272A (en) * | 2018-11-23 | 2019-03-12 | 北京时代民芯科技有限公司 | A kind of hybrid power source system |
| CN110034602A (en) * | 2019-04-12 | 2019-07-19 | 无锡龙翼智能科技有限公司 | A kind of unmanned plane power supply system |
| CN110061476A (en) * | 2019-05-20 | 2019-07-26 | 江苏凯创电子科技有限公司 | Power supply device with overcurrent protection |
| CN111293861A (en) * | 2020-03-20 | 2020-06-16 | 邢台子中电子科技有限公司 | Limited bipolar circuit and method |
| CN114268145A (en) * | 2021-12-02 | 2022-04-01 | 中国电子科技集团公司第十八研究所 | Droop control-based charge-discharge regulator and regulation method |
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2018
- 2018-03-02 CN CN201820294947.1U patent/CN207835143U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462272A (en) * | 2018-11-23 | 2019-03-12 | 北京时代民芯科技有限公司 | A kind of hybrid power source system |
| CN110034602A (en) * | 2019-04-12 | 2019-07-19 | 无锡龙翼智能科技有限公司 | A kind of unmanned plane power supply system |
| CN110061476A (en) * | 2019-05-20 | 2019-07-26 | 江苏凯创电子科技有限公司 | Power supply device with overcurrent protection |
| CN111293861A (en) * | 2020-03-20 | 2020-06-16 | 邢台子中电子科技有限公司 | Limited bipolar circuit and method |
| CN114268145A (en) * | 2021-12-02 | 2022-04-01 | 中国电子科技集团公司第十八研究所 | Droop control-based charge-discharge regulator and regulation method |
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