CN109617041A - A kind of energy management of photovoltaic energy storage system and control device - Google Patents
A kind of energy management of photovoltaic energy storage system and control device Download PDFInfo
- Publication number
- CN109617041A CN109617041A CN201910130782.3A CN201910130782A CN109617041A CN 109617041 A CN109617041 A CN 109617041A CN 201910130782 A CN201910130782 A CN 201910130782A CN 109617041 A CN109617041 A CN 109617041A
- Authority
- CN
- China
- Prior art keywords
- output
- input terminal
- floop
- output end
- reset flip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 52
- 101100464782 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CMP2 gene Proteins 0.000 claims abstract description 21
- 101100464779 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) CNA1 gene Proteins 0.000 claims abstract description 21
- 230000001939 inductive effect Effects 0.000 claims description 27
- 101001122448 Rattus norvegicus Nociceptin receptor Proteins 0.000 claims description 15
- 230000009977 dual effect Effects 0.000 description 34
- 238000004088 simulation Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/12—Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
-
- 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
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- 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
Abstract
The invention discloses a kind of energy management of photovoltaic energy storage system and control devices, including two-output impulse generator converter and control circuit；Two-output impulse generator converter is derived by two-tube One Buck-Boost converter body, and the input terminal of two-tube One Buck-Boost converter body is connect with photovoltaic module, and output end and load connect.Simultaneously, in order to overcome the output power of photovoltaic module to there are the characteristics that fluctuation, a branch is increased separately in the input side and outlet side of two-tube One Buck-Boost converter body, and it is connected to energy-storage units, wherein, the branch control energy-storage units electric discharge of input side, the branch control energy-storage units charging of outlet side.Control circuit includes MPPT control unit, error amplifier EA, first comparator CMP1, the second comparator CMP2, pulse modulation unit, multi-path choice unit and pattern switching control unit.The configuration of the present invention is simple, low in cost, power density is high, system effectiveness is high and can be achieved at the same time the output Isobarically Control of the MPPT maximum power point tracking control and load of photovoltaic module.
Description
Technical field
The present invention relates to photovoltaic energy storage systems technology field, the especially a kind of energy management and control of photovoltaic energy storage system
Device.
Background technique
In recent years, with the aggravation of environmental pollution and problem of energy crisis, using solar energy as the generation of electricity by new energy skill of representative
Art becomes research hotspot.The environmental factors such as output characteristics and illumination, temperature due to photovoltaic (Photovoltaic, PV) array are close
Cut phase is closed, and the output characteristics of photovoltaic array has randomness and fluctuation under the conditions of varying environment, therefore, is generated electricity in independent photovoltaic
Energy-storage units be must be equipped in system to store and adjust electric energy, wanted with meeting power load to power supply continuity and stability
It asks.Traditional photovoltaic energy storage system need a Uniderectional DC-DC converter to connect with photovoltaic array and realize maximum power point with
Track (Maximum Power Point Tracking, MPPT) control, a Uniderectional DC-DC converter provide stable for load
Output, while a bidirectional DC-DC converter being needed to connect with energy-storage units, come the power between photovoltaic array that balances the load
Balance.This causes the volume of conventional photovoltaic energy-storage system and cost larger, controls relative complex, it is difficult to realize centerized fusion.
Multiple single-input single-output converters are replaced using multiport converter, can greatly reduce the cost and raising system of system
Power density, and can be realized centerized fusion, control circuit design is more flexible, causes the extensive concern of researcher.
Researcher proposes a series of multiport converter topologies, is broadly divided into isolated form and non-isolated property, the transformation of isolated form multiport
Device is mainly derivative by half-bridge converter, full-bridge converter, its main feature is that power grade is high, is able to achieve electrical isolation etc., it is non-isolated
Type multiport converter is generally derivative by basic Buck, Boost, One Buck-Boost converter body, compared to isolated form multiport
Converter, non-isolation type multiport converter has higher power density, and designs simpler.However, existing non-isolated
Type multiport converter all includes generally multiple inductance, and system bulk is big, cannot achieve Time-sharing control.
It is to guarantee entirely between energy management and control the port of the independent photovoltaic energy-storage system based on multiport converter
The key of system stable operation, existing control method mainly include two types.One is real using polycyclic road competition mechanism
Now to the control of system and energy management, this method not can be implemented simultaneously the maximum power output and load voltage of photovoltaic module
It is constant.Another method is using voltage-type centerized fusion, and principle is the energy by complicated modulation realization system
Management and control, this method design is complicated, and the adjustable range of system is relatively narrow, can not be suitable for input or load acute variation
Occasion.
Summary of the invention
The object of the present invention is to provide a kind of energy management of photovoltaic energy storage system and control devices.
Realize that the technical solution of the object of the invention is as follows:
A kind of energy management of photovoltaic energy storage system and control device, including two-output impulse generator converter and control electricity
Road；
Two-output impulse generator converter includes two-tube One Buck-Boost converter body, and Buck end switch pipe is S1, the end Boost
Switching tube is S2, load end switching tube is S3；The input terminal and output end of two-tube One Buck-Boost converter body are respectively connected to described
The photovoltaic module PV and load R of photovoltaic energy storage system；Two-output impulse generator converter further includes outlet side branch and inputs collateral
Road；Outlet side branch includes diode D3With switching tube S4, D3Anode be connected to S2Drain electrode, D3Cathode be connected to S4Leakage
Pole, S4Source electrode be connected to the photovoltaic energy storage system energy-storage units anode；Input side branch includes diode D4And switch
Pipe S5, D4Cathode be connected to S1Source electrode, D4Anode be connected to S5Source electrode, S5Drain electrode be connected to the photovoltaic energy storage system
The anode of the energy-storage units of system；The cathode of energy-storage units is connected to S2Source electrode；
The control circuit includes MPPT control unit, error amplifier EA, first comparator CMP1, the second comparator
CMP2, pulse modulation unit, multi-path choice unit and pattern switching control unit；
The input terminal of MPPT control unit inputs the output voltage V of photovoltaic module PV respectivelypvWith output electric current Ipv, output
End is connected to an input terminal of CMP1, and another input terminal of CMP1 inputs the inductive current of two-tube One Buck-Boost converter body
iL；
The input terminal of error amplifier EA inputs the output voltage V of two-tube One Buck-Boost converter body respectivelyoJoin with voltage
Examine value Vo_ref, output end is connected to an input terminal of CMP2, and another input terminal of CMP2 inputs two-tube Buck-Boost and becomes
The inductive current i of parallel operationL；
Pulse modulation unit includes set-reset flip-floop 2#, set-reset flip-floop 3#, set-reset flip-floop 4#, logic XOR gate XOR1, logic
XOR gate XOR2, logic inverter NO1, logic inverter NO2 and logic inverter NO3；Multi-path choice unit includes two-way selector
MUX1, two-way selector MUX2, two-way selector MUX3 and two-way selector MUX4；
The output end c of CMP11It is connect respectively with the reset terminal of set-reset flip-floop 2# and set-reset flip-floop 3#；The output end c of CMP22
It is connect with the set end of set-reset flip-floop 3#, and c2It is connect after NO2 with the reset terminal of set-reset flip-floop 4#；Clock signal clk difference
It is connect with the set end of set-reset flip-floop 2# and set-reset flip-floop 4#；The output end Q of set-reset flip-floop 2# is connected to S1Grid, meanwhile,
The output end Q of set-reset flip-floop 2# is connected to an input terminal of XOR1, and the output end Q of set-reset flip-floop 3# is connected to the another of XOR1
A input terminal, the output end of XOR1 are connected to the first via input terminal of MUX1, and the second road input terminal of MUX1 is connected to low level,
The output end of MUX1 is connected to S4Grid；The output of XOR1 is connected to the first via input terminal of MUX2, set-reset flip-floop 4# through NO1
Output end Q the second road input terminal of MUX2 is connected to through NO3, the output end of MUX2 is connected to S3Grid；Set-reset flip-floop 2#
Output end Q be connected to the first via input terminal of MUX3, the output end Q of set-reset flip-floop 4# is connected to the second tunnel input of MUX3
End, the output of MUX3 are connected to S2Grid；The output end Q of set-reset flip-floop 2# is connected to an input terminal of XOR2, SR triggering
The output end Q of device 4# is connected to another input terminal of XOR2, and the output end of XOR2 is connected to the second road input terminal of MUX4,
The first via input terminal of MUX4 is connected to low level, and the output end of MUX4 is connected to S5Grid；
Pattern switching control unit includes subtracter SUB, comparator CMP3, comparator CMP4 and set-reset flip-floop 1#；SUB's
Input terminal inputs the output voltage V of two-tube One Buck-Boost converter body respectivelyoWith voltage reference value Vo_ref, output end respectively with
CMP3 is connected with an input terminal of CMP4, and another input terminal of CMP3 inputs the another of preset voltage threshold Δ V, CMP4
A input terminal input preset voltage threshold-Δ V, CMP3 and CMP4 output end respectively with the reset terminal of set-reset flip-floop 1# and set
The connection of position end, the output end Q of set-reset flip-floop 1# are connected to the selection end of MUX1, MUX2, MUX3 and MUX4 simultaneously.
Compared with prior art, the beneficial effects of the present invention are:
1. having, of simple structure and low cost, power density is high, system effectiveness is high and can be realized centerized fusion
Advantage.
2. can be achieved at the same time the output Isobarically Control of the MPPT maximum power point tracking control and load of photovoltaic module, and control
Principle is simpler, and design is more flexible, in the system of similar structures easy to spread to other.
3. can adapt to the extreme cases such as photovoltaic power mutation, bearing power mutation, the reliability of system and steady ensure that
Fixed operation.
Detailed description of the invention
Fig. 1 is the energy management of photovoltaic energy storage system and the structure chart of control device；
Fig. 2 is two-output impulse generator converter principle figure；
Fig. 3 (a), Fig. 3 (b) are equivalent circuit and Steady Wave of the two-output impulse generator converter in dual output mode respectively
Shape；
Fig. 4 (a), Fig. 4 (b) are equivalent circuit and Steady Wave of the two-output impulse generator converter in dual input mode respectively
Shape；
Fig. 5 is the pattern switching control unit schematic diagram of control circuit；
Fig. 6 is the pulse modulation unit of control circuit and the schematic diagram of multi-path choice unit；
Fig. 7 is simulation waveform when system runs on dual output mode；Wherein, Fig. 7 (a) is the static Simulation wave of system
Shape, Fig. 7 (b) are the system transients simulation waveform under dual output mode when load sudden change；
Fig. 8 is system since photovoltaic power reduces, wink when operational mode is from dual output pattern switching to dual input mode
State simulation waveform；
Fig. 9 is simulation waveform when system runs on dual input mode；Wherein, Fig. 9 (a) is the static Simulation wave of system
Shape, Fig. 9 (b) are the system transients simulation waveform under dual input mode when load sudden change；
Figure 10 is system since photovoltaic power increases, wink when operational mode is from dual input pattern switching to dual output mode
State simulation waveform.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.
Fig. 1 is shown, and system includes main power circuit and control circuit, main power circuit by two-output impulse generator converter with
And photovoltaic module connected to it, energy-storage units, load unit composition.Control circuit is by MPPT control unit, error amplifier
EA, first comparator CMP1, the second comparator CMP2, pulse modulation unit, pattern switching control unit and multi-path choice unit
Composition.The output voltage V of photovoltaic modulepvWith output electric current IpvAs the input signal of MPPT control unit, MPPT control unit
Output connection CMP1 an input terminal, inductive current iLIt is connected to another input terminal of CMP1, error amplifier EA's
An input terminal of output connection CMP2, inductive current iLIt is connected to another input terminal of CMP2, the output of CMP1, CMP2
Output and clock signal clk are sent to pulse modulation unit, input of the output of pulse modulation unit as multi-path choice unit,
Switching tube in the output control two-output impulse generator converter of multi-path choice unit.Output voltage VoWith reference voltage Vo_refMake
Output for the input of pattern switching control unit, pattern switching control unit is connected as the selection signal of multi-path choice unit
To multichannel selecting unit.
Fig. 2 shows two-output impulse generator converter principle figures, including photovoltaic module PV, energy-storage units, load unit R, light
It lies prostrate component and accesses diode D1, input filter capacitor Cin, Buck end switch pipe S1, Boost end switch pipe S2, it is energy storage inductor L, negative
Carry branch switch pipe S3, energy-storage units charging branch diode D3, energy-storage units charging paths switching tube S4, energy-storage units electric discharge
Bypass diodes S5, output end filter capacitor Cout。
Two-output impulse generator converter is derived by two-tube One Buck-Boost converter body, two-tube One Buck-Boost converter body it is defeated
Enter end to connect with photovoltaic module, output end and load connect.Meanwhile in order to overcome the output power of photovoltaic module to there is fluctuation
Feature increases separately a branch in the input side and outlet side of two-tube One Buck-Boost converter body, and is connected to energy-storage units,
Wherein, the branch control energy-storage units electric discharge of input side, the branch control energy-storage units charging of outlet side.
In order to realize the energy balance between photovoltaic module and load, according to the peak power output and load of photovoltaic module
The operational mode of system is divided into dual output mode and dual input mode by the size relation of the power of demand.In dual output mode,
The peak power output of photovoltaic module is greater than the power (P of loading demandmax>Po), the flow direction of surplus power caused by photovoltaic module
Energy-storage units charge for energy-storage units；In dual input mode, the peak power output of photovoltaic module is less than the power of loading demand
(Pmax<Po), the output power of photovoltaic module is unable to satisfy loading demand, and energy-storage units provide insufficient power by electric discharge, from
And the normal work of proof load.
Fig. 3 shows two-output impulse generator converter in the equivalent circuit and stable state waveform of dual output mode, switchs at one
In period, system includes three switch states, and first switch state refers to switching tube S1And S2Conducting, photovoltaic module pass through two
Pole pipe D1It charges to inductance L, inductive current rises；Second switch state refers to switching tube S1And S2Shutdown, switching tube S3It leads
Logical, inductance L passes through diode D2To load discharge, inductive current decline；Third switch state refers to switching tube S3Shutdown, is opened
Close pipe S4Conducting, inductance L pass through diode D2It discharges to energy-storage units, inductive current continues to decline.
Fig. 4 shows two-output impulse generator converter in the equivalent circuit and stable state waveform of dual input mode, switchs at one
In period, system includes three switch states, and first switch state refers to switching tube S1And S2Conducting, photovoltaic module pass through two
Pole pipe D1It charges to inductance L, inductive current rises；Second switch state refers to switching tube S1Shutdown, switching tube S2And S5It leads
Logical, energy-storage units pass through diode D4It charges to inductance L, inductive current continues to rise；Third switch state refers to switching tube S2
And S5Shutdown, switching tube S3Conducting, inductance L pass through diode D2To load discharge, inductive current decline.
In order to realize Fig. 3 and system operational modal shown in Fig. 4, a kind of control circuit is designed, control circuit includes MPPT
Control unit, error amplifier EA, first comparator CMP1, the second comparator CMP2, pulse modulation unit, multi-path choice unit
With pattern switching control unit.
The output voltage V of control circuit sampling photovoltaic modulepvWith output electric current Ipv, and give to MPPT control unit and carry out
The output and dual input for comparing MPPT control unit are sent to comparator CMP1, CMP1 in MPPT operation, the output of MPPT control unit
The size of inductive current in dual-output converter；The load voltage V of control circuit sampling two-output impulse generator convertero, and by Vo
With output reference voltage Vo_refAs the input of error amplifier EA, the output of EA, which is sent to comparator CMP2, CMP2, compares EA's
The size of inductive current in output and two-output impulse generator converter；The output c of CMP11, CMP2 output c2, clock signal clk
Input signal of the three as pulse modulation unit, input of the output of pulse modulation unit as multi-path choice unit, multichannel
Selecting unit determines the switching signal of its output by mode select signal mel, to realize system in the control of corresponding modes.
Pulse modulation unit includes set-reset flip-floop 2#, set-reset flip-floop 3#, set-reset flip-floop 4#, logic XOR gate XOR1, logic
XOR gate XOR2, logic inverter NO1, logic inverter NO2, logic inverter NO3.Multi-path choice unit includes two-way selector
MUX1, two-way selector MUX2, two-way selector MUX3, two-way selector MUX4, two-way selector MUX5.The output c of CMP11
It is connect respectively with the reset terminal of set-reset flip-floop 2# and set-reset flip-floop 3#；The output c of CMP22Connect with the set end of set-reset flip-floop 3#
It connects, and c2It is connect after NO2 with the reset terminal of set-reset flip-floop 4#；The clk set with set-reset flip-floop 2# and set-reset flip-floop 4# respectively
End connection.Switch control signal of the output end Q of set-reset flip-floop 2# as switching tube S1, meanwhile, the output end Q of set-reset flip-floop 2#
It is connected to an input terminal of XOR1, the output end Q of set-reset flip-floop 3# is connected to another input terminal of XOR1, the output of XOR1
End is connected to the first via input terminal of MUX1, and the second road input terminal of MUX1 connects low level, and the output end of MUX1 is as switch
The switch control signal of pipe S4.The output of XOR1 is connected to the first via input terminal of MUX2, the output end of set-reset flip-floop 4# through NO1
Q is connected to the second road input terminal of MUX2, switch control signal of the output of MUX2 as switching tube S3 through NO3.Set-reset flip-floop
The output end Q of 2# is connected to the first via input terminal of MUX3, and the output end Q of set-reset flip-floop 4# is connected to the second tunnel input of MUX3
End, switch control signal of the output of MUX3 as switching tube S2.The output end Q of set-reset flip-floop 2# be connected to XOR2 one is defeated
Enter end, the output end Q of set-reset flip-floop 4# is connected to another input terminal of XOR2, and the output end of XOR2 is connected to the second of MUX4
The first via input terminal of road input terminal, MUX4 is connect with low level, and the output end of MUX4 is believed as the switch control of switching tube S5
Number.Which path switching signal of the output of each two-way selector determined by mel signal for multi-path choice unit, if mel makes system
Dual output mode is worked in, then each two-way selector exports the first path switching signal, if mel makes system work in dual input mould
Formula, then each two-way selector exports the second path switching signal.
Pattern switching control unit includes subtracter SUB, comparator CMP3, comparator CMP4, set-reset flip-floop 1#, output electricity
Press VoWith voltage reference value Vo_refAs the input of SUB, SUB's exports an input terminal with comparator CMP3 and CMP4 respectively
Connection, another input terminal of CMP3 are connect with preset voltage threshold Δ V, another input terminal and preset voltage of CMP4
The output end of threshold value-Δ V connection, CMP3 and CMP4 are connect with the reset terminal of set-reset flip-floop 1# and set end respectively.Set-reset flip-floop
The output end Q of 1# is pattern switching control signal mel.
The specific working principle is as follows: the output voltage V of control circuit sampling photovoltaic modulepvWith output electric current Ipv, and send to
MPPT control unit carries out MPPT operation, and MPPT algorithm uses perturbation observation method, operation result vmppteAs MPPT arithmetic element
Output, and send to comparator CMP1, CMP1 and compare inductive current iLAnd vmppteSize, if iLGreater than vmppte, then CMP1 is defeated
C out1For high level, if iLLess than vmppte, then CMP1 exports c1For low level；Meanwhile the load voltage V of oversampled convertero, and
By VoWith output reference voltage Vo_refAs the input of error amplifier EA, error amplification signal voeAs the output of EA, and send
Compare inductive current i to comparator CMP2, CMP2LAnd voeSize, if iLLess than voe, then CMP2 exports c2For high level, if iL
Greater than voe, then CMP2 exports c2For low level；c1、c2Input with clock signal clk as pulse modulation unit, impulse modulation
The output of unit includes two groups of signals, and one group is switching signal that system works in dual input mode, and one group is that system works in
The switching signal of dual output mode, two groups of signals are used as the input of multi-path choice unit, and multi-path choice unit is selected by mode
The switching signal that signal mel determines its output is selected, to realize system in the control of corresponding modes.
Fig. 5 is shown, the pattern switching control unit schematic diagram of control circuit, calculates output voltage V in real timeoWith reference voltage
Vo_refDifference, and calculated result sent respectively to comparator CMP3 and comparator CMP4, respectively with preset threshold value Δ V and-
Δ V is compared, if Vo-Vo_ref> Δ V, CMP3 export high level, and reset set-reset flip-floop 1#, and mel signal is 0, system fortune
Row is in dual output mode, if Vo-Vo_ref<-Δ V) when, CMP4 exports high level, and makes set-reset flip-floop 1# set, and mel signal is
1, system runs on dual input mode.
Fig. 6 is shown, the pulse modulation unit of control circuit and the schematic diagram of multi-path choice unit, comparator CMP1 and CMP2
The c of output1And c2And input of the clock signal clk as pulse modulation unit, specific working principle are described as follows: in lose-lose
Mode out, mel signal are 0, and each multiple selector MUX gates first via signal as output, institute in multi-path choice unit
With switching tube S5Always in an off state, switch periods start time, clk makes set-reset flip-floop 2# and set-reset flip-floop 3# set,
Switching tube S1And S2Conducting, inductive current rises, when inductive current rises to vmppteWhen, the c of comparator CMP1 output1For high electricity
Put down and make set-reset flip-floop 2# and set-reset flip-floop 3# to reset, switching tube S1And S2Shutdown, S3Conducting, inductive current are begun to decline, and work as electricity
Inducing current drops to voeWhen, the c of comparator CMP2 output2For high level and make set-reset flip-floop 3# set, switching tube S4Conducting, is opened
Close pipe S3Shutdown, inductive current continue to decline, until next switch periods arrive.In dual input mode, mel signal is 1, more
Each multiple selector MUX gates second road signal as output, so switching tube S in the selecting unit of road4Always in pass
Disconnected state, switch periods start time, clk makes set-reset flip-floop 2# and set-reset flip-floop 3# set, switching tube S1And S2Conducting, inductance
Electric current rises, when inductive current rises to voeWhen, the c of comparator CMP1 output1For high level and touch set-reset flip-floop 2# and SR
It sends out device 3# to reset, switching tube S1Shutdown, S5Conducting, inductive current continues to rise, when inductive current rises to voeWhen, comparator
The c of CMP2 output2For low level and reset set-reset flip-floop 4#, switching tube S3Conducting, inductive current is begun to decline, until next
A switch periods arrive.
Time-domain-simulation analysis, the simulation parameter setting of system are carried out with system of the PSIM simulation software to the present embodiment are as follows:
Cin=Cout=470 μ F, L=330 μ H, bearing power Po=100W, load voltage Vo=48V, battery terminal voltage Vbat=25V,
Switching frequency is fs=100kHz, system emulation result are as follows.
Fig. 7 (a) is the stable state waveform that system runs on dual output mode, the conducting timing including each switching tube, inductance
Electric current and voltage across the inductor waveform, it can be seen from the figure that the conducting timing of switching tube is consistent with theory analysis, inductive current
" liter-drop-drop " variation tendency is presented；When Fig. 7 (b) is that system runs on dual output mode, the transient response waveform of load sudden change,
The Maximum Power Output of photovoltaic module is 120W at this time, and initial time, photovoltaic module is with maximum power output, load consuming power
For 100W, it is 20W that energy-storage units, which absorb power, and in 0.5s, bearing power is reduced to 50W by 100W, and energy-storage units absorb power
70W is sported, bearing power increases to 100W by 50W in 0.7s, and running situation is consistent with original state.
Fig. 8 is system running pattern from dual output pattern switching to the simulation waveform of dual input mode, initial time, photovoltaic
Component is with the maximum power output of 120W, and load consuming power 100W, it is 20W that energy-storage units, which absorb power, in the 0.3s time
The peak power output of volt component sports 60W from 120W, and the output power of photovoltaic module is not able to satisfy loading demand, in order to protect
System worked well is demonstrate,proved, system running pattern switches to dual input mode, and energy-storage units are to load discharge, discharge power 40W.
Fig. 9 (a) is the stable state waveform that system runs on dual input mode, the conducting timing including each switching tube, inductance
Electric current and voltage across the inductor waveform, it can be seen from the figure that the conducting timing of switching tube is consistent with theory analysis, inductive current
" liter rises-drops " variation tendency is presented；When Fig. 9 (b) is that system runs on dual input mode, the transient response waveform of load sudden change,
The Maximum Power Output of photovoltaic module is 60W at this time, and initial time, photovoltaic module is with maximum power output, energy-storage units output
Power is 40W, bearing power 100W, and in 0.5s, bearing power increases to 120W by 100W, and energy-storage units output power is prominent
Become 60W, bearing power is decreased to 100W by 120W in 0.7s, and running situation is consistent with original state.
Figure 10 is system running pattern from dual input pattern switching to the simulation waveform of dual output mode, initial time, light
Component is lied prostrate with the maximum power output of 60W, energy-storage units output power is 40W, load consuming power 100W, in the 0.3s time
The peak power output for lying prostrate component sports 120W from 60W, and the output power of photovoltaic module is greater than the power of loading demand, in order to
Guarantee that system worked well, system running pattern switch to dual output mode, energy-storage units switch to charge mode, charge power
For 20W.
It can be seen that the energy management and control method of photovoltaic energy storage system proposed by the invention from above-mentioned simulation result
Maximum power output and the load voltage that can be realized photovoltaic module are constant, and system is in the changed power of photovoltaic module and load
When can reasonably distribute the power between each port, pattern switching is neatly realized, guarantees the stable and high effective operation of system.
Claims (1)
1. energy management and the control device of a kind of photovoltaic energy storage system, which is characterized in that including two-output impulse generator converter
And control circuit；
Two-output impulse generator converter includes two-tube One Buck-Boost converter body, and Buck end switch pipe is S1, Boost end switch
Pipe is S2, load end switching tube is S3；The input terminal and output end of two-tube One Buck-Boost converter body are respectively connected to the photovoltaic
The photovoltaic module PV and load R of energy-storage system；Two-output impulse generator converter further includes outlet side branch and input side branch；It is defeated
Collateral road includes diode D out3With switching tube S4, D3Anode be connected to S2Drain electrode, D3Cathode be connected to S4Drain electrode, S4
Source electrode be connected to the photovoltaic energy storage system energy-storage units anode；Input side branch includes diode D4With switching tube S5,
D4Cathode be connected to S1Source electrode, D4Anode be connected to S5Source electrode, S5Drain electrode be connected to the photovoltaic energy storage system
The anode of energy-storage units；The cathode of energy-storage units is connected to S2Source electrode；
The control circuit include MPPT control unit, error amplifier EA, first comparator CMP1, the second comparator CMP2,
Pulse modulation unit, multi-path choice unit and pattern switching control unit；
The input terminal of MPPT control unit inputs the output voltage V of photovoltaic module PV respectivelypvWith output electric current Ipv, output end connection
To an input terminal of CMP1, another input terminal of CMP1 inputs the inductive current i of two-tube One Buck-Boost converter bodyL；
The input terminal of error amplifier EA inputs the output voltage V of two-tube One Buck-Boost converter body respectivelyoAnd voltage reference value
Vo_ref, output end is connected to an input terminal of CMP2, and another input terminal of CMP2 inputs two-tube One Buck-Boost converter body
Inductive current iL；
Pulse modulation unit includes set-reset flip-floop 2#, set-reset flip-floop 3#, set-reset flip-floop 4#, logic XOR gate XOR1, logic exclusive or
Door XOR2, logic inverter NO1, logic inverter NO2 and logic inverter NO3；Multi-path choice unit includes two-way selector MUX1, two
Road selector MUX2, two-way selector MUX3 and two-way selector MUX4；
The output end c of CMP11It is connect respectively with the reset terminal of set-reset flip-floop 2# and set-reset flip-floop 3#；The output end c of CMP22With SR
The set end of trigger 3# connects, and c2It is connect after NO2 with the reset terminal of set-reset flip-floop 4#；Clock signal clk respectively with SR
Trigger 2# is connected with the set end of set-reset flip-floop 4#；The output end Q of set-reset flip-floop 2# is connected to S1Grid, meanwhile, SR touching
The output end Q of hair device 2# is connected to an input terminal of XOR1, the output end Q of set-reset flip-floop 3# be connected to XOR1 another is defeated
Enter end, the output end of XOR1 is connected to the first via input terminal of MUX1, and the second road input terminal of MUX1 is connected to low level, MUX1
Output end be connected to S4Grid；The output of XOR1 is connected to the first via input terminal of MUX2 through NO1, and set-reset flip-floop 4#'s is defeated
Outlet Q is connected to the second road input terminal of MUX2 through NO3, and the output end of MUX2 is connected to S3Grid；Set-reset flip-floop 2#'s is defeated
Outlet Q is connected to the first via input terminal of MUX3, and the output end Q of set-reset flip-floop 4# is connected to the second road input terminal of MUX3,
The output of MUX3 is connected to S2Grid；The output end Q of set-reset flip-floop 2# is connected to an input terminal of XOR2, set-reset flip-floop 4#
Output end Q be connected to another input terminal of XOR2, the output end of XOR2 is connected to the second road input terminal of MUX4, MUX4's
First via input terminal is connected to low level, and the output end of MUX4 is connected to S5Grid；
Pattern switching control unit includes subtracter SUB, comparator CMP3, comparator CMP4 and set-reset flip-floop 1#；The input of SUB
End inputs the output voltage V of two-tube One Buck-Boost converter body respectivelyoWith voltage reference value Vo_ref, output end respectively with CMP3 and
An input terminal of CMP4 connects, and another input terminal of CMP3 inputs another input of preset voltage threshold Δ V, CMP4
End inputs preset voltage threshold-Δ V, CMP3 and CMP4 output end and connects respectively with the reset terminal of set-reset flip-floop 1# and set end
It connects, the output end Q of set-reset flip-floop 1# is connected to the selection end of MUX1, MUX2, MUX3 and MUX4 simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130782.3A CN109617041B (en) | 2019-02-21 | 2019-02-21 | Energy management and control device of photovoltaic energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910130782.3A CN109617041B (en) | 2019-02-21 | 2019-02-21 | Energy management and control device of photovoltaic energy storage system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109617041A true CN109617041A (en) | 2019-04-12 |
| CN109617041B CN109617041B (en) | 2023-10-24 |
Family
ID=66019909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910130782.3A Active CN109617041B (en) | 2019-02-21 | 2019-02-21 | Energy management and control device of photovoltaic energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109617041B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332517A (en) * | 2020-10-16 | 2021-02-05 | 许继电源有限公司 | Photovoltaic charging MPPT control circuit |
| WO2022087955A1 (en) * | 2020-10-29 | 2022-05-05 | 华为数字能源技术有限公司 | Bus voltage control method and apparatus for photovoltaic system |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090189574A1 (en) * | 2008-01-23 | 2009-07-30 | Alpha Technologies, Inc. | Simplified maximum power point control utilizing the pv array voltage at the maximum power point |
| US20100219690A1 (en) * | 2006-06-07 | 2010-09-02 | Universita'degli Studi Di Salerno | Method and device for controlling the operation of power at the point of maximum power |
| CN103312168A (en) * | 2013-05-09 | 2013-09-18 | 燕山大学 | Bidirectional double-input ZETA direct-current converter and power distribution method thereof |
| CN103326419A (en) * | 2013-05-16 | 2013-09-25 | 国家电网公司 | Solar electricity-taking combined energy-storage uninterruptible power supply device |
| CN104038056A (en) * | 2014-04-04 | 2014-09-10 | 燕山大学 | Dual-input BUCK direct current converter and control system of dual-input BUCK direct current converter |
| WO2014192014A2 (en) * | 2013-05-02 | 2014-12-04 | Indian Institute Of Technology Bombay | Method and system for a low cost bi-directional grid tied photovoltaic (pv) micro inverter |
| CN104320048A (en) * | 2014-10-31 | 2015-01-28 | 重庆大学 | Photovoltaic power generation system with energy storage function and coordinated power supply method of photovoltaic power generation system |
| CN104660033A (en) * | 2015-02-10 | 2015-05-27 | 西南交通大学 | Frequency conversion control method and device for single-inductor dual-output switch converter in continuous conduction mode |
| CN105529812A (en) * | 2016-02-03 | 2016-04-27 | 合肥聚能新能源科技有限公司 | Photovoltaic energy-storage storage battery charge/discharge system |
| CN106026162A (en) * | 2016-05-25 | 2016-10-12 | 南通大学 | Double-input single-tube Boost-type photovoltaic interface converter and control method thereof |
| KR101741020B1 (en) * | 2016-05-30 | 2017-05-30 | 인천대학교 산학협력단 | Battery charging apparatus using photovoltaic energy harvesting with maximum power point tracking control |
| US20170256953A1 (en) * | 2014-09-05 | 2017-09-07 | Mersintel, Co., Ltd. | Optimal power collection control method and apparatus in solar photovoltaic power generation system |
| CN207835080U (en) * | 2018-03-02 | 2018-09-07 | 电子科技大学中山学院 | Photovoltaic power generation system |
| CN109088472A (en) * | 2018-08-22 | 2018-12-25 | 江苏优为视界科技有限公司 | One kind being based on MPPT photovoltaic semiconductors laser luminescent system |
| CN209358245U (en) * | 2019-02-21 | 2019-09-06 | 西南交通大学 | A kind of energy management of photovoltaic energy storage system and control device |
-
2019
- 2019-02-21 CN CN201910130782.3A patent/CN109617041B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100219690A1 (en) * | 2006-06-07 | 2010-09-02 | Universita'degli Studi Di Salerno | Method and device for controlling the operation of power at the point of maximum power |
| US20090189574A1 (en) * | 2008-01-23 | 2009-07-30 | Alpha Technologies, Inc. | Simplified maximum power point control utilizing the pv array voltage at the maximum power point |
| WO2014192014A2 (en) * | 2013-05-02 | 2014-12-04 | Indian Institute Of Technology Bombay | Method and system for a low cost bi-directional grid tied photovoltaic (pv) micro inverter |
| CN103312168A (en) * | 2013-05-09 | 2013-09-18 | 燕山大学 | Bidirectional double-input ZETA direct-current converter and power distribution method thereof |
| CN103326419A (en) * | 2013-05-16 | 2013-09-25 | 国家电网公司 | Solar electricity-taking combined energy-storage uninterruptible power supply device |
| CN104038056A (en) * | 2014-04-04 | 2014-09-10 | 燕山大学 | Dual-input BUCK direct current converter and control system of dual-input BUCK direct current converter |
| US20170256953A1 (en) * | 2014-09-05 | 2017-09-07 | Mersintel, Co., Ltd. | Optimal power collection control method and apparatus in solar photovoltaic power generation system |
| CN104320048A (en) * | 2014-10-31 | 2015-01-28 | 重庆大学 | Photovoltaic power generation system with energy storage function and coordinated power supply method of photovoltaic power generation system |
| CN104660033A (en) * | 2015-02-10 | 2015-05-27 | 西南交通大学 | Frequency conversion control method and device for single-inductor dual-output switch converter in continuous conduction mode |
| CN105529812A (en) * | 2016-02-03 | 2016-04-27 | 合肥聚能新能源科技有限公司 | Photovoltaic energy-storage storage battery charge/discharge system |
| CN106026162A (en) * | 2016-05-25 | 2016-10-12 | 南通大学 | Double-input single-tube Boost-type photovoltaic interface converter and control method thereof |
| KR101741020B1 (en) * | 2016-05-30 | 2017-05-30 | 인천대학교 산학협력단 | Battery charging apparatus using photovoltaic energy harvesting with maximum power point tracking control |
| CN207835080U (en) * | 2018-03-02 | 2018-09-07 | 电子科技大学中山学院 | Photovoltaic power generation system |
| CN109088472A (en) * | 2018-08-22 | 2018-12-25 | 江苏优为视界科技有限公司 | One kind being based on MPPT photovoltaic semiconductors laser luminescent system |
| CN209358245U (en) * | 2019-02-21 | 2019-09-06 | 西南交通大学 | A kind of energy management of photovoltaic energy storage system and control device |
Non-Patent Citations (1)
| Title |
|---|
| 申玮霓;王玉生;张利;白连平;: "光伏发电双管Buck-Boost电路两模式控制方法的仿真与实验研究", 电气技术, no. 07 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332517A (en) * | 2020-10-16 | 2021-02-05 | 许继电源有限公司 | Photovoltaic charging MPPT control circuit |
| WO2022087955A1 (en) * | 2020-10-29 | 2022-05-05 | 华为数字能源技术有限公司 | Bus voltage control method and apparatus for photovoltaic system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109617041B (en) | 2023-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mirzaei et al. | Design and construction of a charge controller for stand-alone PV/battery hybrid system by using a new control strategy and power management | |
| Zeng et al. | A multiport bidirectional DC–DC converter for hybrid renewable energy system integration | |
| Behjati et al. | A multi-port dc-dc converter with independent outputs for vehicular applications | |
| CN102324845B (en) | Control method for single-inductance double-output DC-DC (direct current) switching power supply and circuit thereof | |
| CN110212763B (en) | Four-phase parallel capacitor series connection type Boost converter and current sharing method thereof | |
| Abdullah et al. | Control of a bidirectional converter to interface ultracapacitor with renewable energy sources | |
| CN106208698A (en) | It is provided with four switch Buck Boost circuit and control methods thereof of Sofe Switch | |
| CN103840529B (en) | The solar charging/discharging control system controlled based on ARM and control method | |
| CN104852623B (en) | The spacecraft power supply system and control method of a kind of based superconductive magnetic storage energy | |
| CN102548154A (en) | Control device for solar light-emitting diode (LED) lighting system | |
| Ning et al. | A four-port bidirectional DC-DC converter for renewable energy-battery-DC microgrid system | |
| CN111049381A (en) | Multi-objective collaborative optimization control method applied to direct-current three-level converter | |
| CN109617041A (en) | A kind of energy management of photovoltaic energy storage system and control device | |
| Qi et al. | A coupled inductors based high gain non-isolated three-port DC-DC converter | |
| CN209358245U (en) | A kind of energy management of photovoltaic energy storage system and control device | |
| CN108899987B (en) | Solar charging control circuit with MPPT function | |
| CN209767386U (en) | Four-port converter with bipolar output | |
| Kaushik et al. | Performance Analysis of Boost Converters in a PV System with P and O based MPPT Controller connected to a Battery Backup and Grid | |
| CN111585322A (en) | Mobile online photovoltaic charging MPPT device based on variable-step disturbance approximation method | |
| Athikkal et al. | Performance analysis of a positive output voltage dual input dc–dc converter for hybrid energy application | |
| Chakraborty et al. | Current-Programmed Control for Integrated Dual Input Single Output Converter for Solar-Battery Integration | |
| Jun et al. | Characteristics analysis of ultracapacitor-battery hybrid energy storage system | |
| Singh et al. | Active-network with passive capacitor based high gain dc-dc converter | |
| CN110061625B (en) | Four-port converter with bipolar output and control method thereof | |
| CN204189064U (en) | A kind of photovoltaic cell MPPT system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |