CN107069695B - A kind of mixed energy storage system and its control method based on double active full-bridge converters - Google Patents
A kind of mixed energy storage system and its control method based on double active full-bridge converters Download PDFInfo
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- CN107069695B CN107069695B CN201710429836.7A CN201710429836A CN107069695B CN 107069695 B CN107069695 B CN 107069695B CN 201710429836 A CN201710429836 A CN 201710429836A CN 107069695 B CN107069695 B CN 107069695B
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Abstract
The invention discloses one kind based on double active full-bridge converter mixed energy storage systems and its control method, it is related to direct-current grid hybrid energy-storing field, by super capacitor, lithium battery, double active full-bridge converters, Buck/Boost reversible transducer and DC bus are constituted, and two kinds of energy storage devices form a kind of mixed energy storage system of cascade connection type.Super capacitor passes through double active full-bridge converters and connect with DC bus, mixed energy storage system output power is automatically adjusted, with stable DC busbar voltage by acquiring DC bus-bar voltage information using phase shift closed-loop control.Lithium battery is connect by Buck/Boost reversible transducer with super capacitor, using Double closed-loop of voltage and current, voltage by acquiring super capacitor controls the auto charge and discharge of lithium battery, maintain the voltage of super capacitor in operating voltage range, indirect compensation is carried out to direct-current grid power swing, to reduce lithium battery operating frequency, effectively prolong its service life.
Description
Technical field
The present invention relates to direct-current grid hybrid energy-storing field, specifically a kind of mixing based on double active full-bridge converters
Energy-storage system and its control method.
Background technique
With the increasingly increase of the serious aggravation and new energy demand of problem of environmental pollution, the development of DC micro-electric network technology
More and more concerns are obtained.Micro-capacitance sensor be it is a kind of by distributed generation resource, load, energy storage device, converters with
And monitoring and protecting device organic combination together be transported to electric system.In direct-current grid, due to distributed generation resource output work
The intermittence and randomness of rate, energy-storage system becomes the important component of direct-current grid, for maintaining in direct-current grid
The power-balance in portion, and stable DC busbar voltage.Mixed energy storage system is excellent in performance using super capacitor and lithium battery
Gesture is complementary, they are used in mixed way, is connected to DC bus by interface converter, by using reasonable control strategy,
Improve the overall performance of energy-storage system.Energy-storage system is connected by two-way DC/DC converter with DC bus, straight by acquiring
The operating status of busbar voltage information and energy-storage system is flowed, to control the charge and discharge of energy-storage system.Related scholar devises use
Super capacitor and lithium battery are connected to DC bus respectively by two Buck/Boost reversible transducers, then two parts are in parallel
Mixed energy storage system.Generally in the lower situation of voltage transformation class requirement, there is circuit using this mixed energy storage system
Structure is simple, and circuit element is few, the advantage of control mode simplicity.But under higher voltage transformation class requirement, due to Buck/
The boosting of Boost reversible transducer is smaller, and switching loss is big, so that the voltage rating of energy storage device must improve, brings storage
Imbalance problem between energy equipment monomer.And the storage being directly connected to using Buck/Boost reversible transducer and DC bus
Energy system, does not have electrical isolation performance, and the safety of energy-storage system is lower.Therefore it needs to invent a kind of new hybrid energy-storing system
System, solves the problems, such as existing mixed energy storage system, to improve the overall operation performance of mixed energy storage system.
Summary of the invention
The present invention is small in order to solve transformation ratio in existing mixed energy storage system, lacks electrical isolation performance, and lithium battery fills
Frequently, service life short problem provides a kind of mixed energy storage system and its controlling party based on double active full-bridge converters for electric discharge
Method.
The present invention is achieved through the following technical solutions.
A kind of mixed energy storage system based on double active full-bridge converters, including super capacitor, lithium battery, double active full-bridges
Converter, Buck/Boost reversible transducer；The super capacitor passes through double active full-bridge converters and connect with DC bus, institute
Double active full-bridge converters are stated using phase shift closed-loop control；The lithium battery passes through Buck/Boost reversible transducer and super electricity
Hold connection, the Buck/Boost reversible transducer uses Double closed-loop of voltage and current.
Combine above two energy storage device the mixed energy storage system to form a kind of cascade connection type.
A kind of control method of the mixed energy storage system based on double active full-bridge converters is as follows:
The control method of double active full-bridge converters are as follows: phase shift closed-loop control, the i.e. given reference of setting mixed energy storage system
VoltageU refWith DC bus-bar voltageU dcVoltage PI regulator is sent into compared to after, voltage PI regulator output valve passes through limiter
After obtain phase shift duty ratioD 1Value, then phase shift duty ratioD 1The PWM waveform Jing Guo phase shift is exported by phase-shift PWM generator
Phase-shift PWM modulation is carried out to the switching tube of double active full-bridge converters.Double active full-bridge converters are phase shift closed-loop control, purpose
It is that mixed energy storage system output power is automatically adjusted, with stable DC busbar voltage by DC bus-bar voltage information.
The control method of Buck/Boost reversible transducer are as follows: Double closed-loop of voltage and current, i.e. setting super capacitor are given
Determine reference voltageU sc_refWith super-capacitor voltageU scVoltage PI regulator, voltage PI regulator output valve warp are sent into compared to after
Obtain lithium battery with reference to output electric current after overcurrent limiterI bat_ref, then with lithium battery export electric currentI batIt is sent into compared to after
Electric current pi regulator, dutyfactor value of the electric current pi regulator output valve as Buck/Boost reversible transducerD 2, then duty
RatioD 2PWM modulation is carried out by switching tube of the PWM generator output PWM waveform to Buck/Boost reversible transducer.Buck/
Boost reversible transducer is Double closed-loop of voltage and current, it is therefore an objective to control the automatic of lithium battery according to the voltage of super capacitor
Charge and discharge maintain the voltage of super capacitor in operating voltage range, carry out indirect compensation to direct-current grid power swing,
To reduce lithium battery operating frequency, effectively prolong its service life.
The control method of super capacitor are as follows: the working condition of setting super capacitor and double active full-bridge converters determines area
Between, it is designed specifically to: setting DC bus-bar voltageU DCFor its voltage rating, subregion is carried out to it,U LD3<U LD2<U LD1<U DC<U HD1
<U HD2<U HD3For the voltage threshold of double active full-bridge converter work.[U LD3,U LD2) it is LD(Limited Discharge, current limliting
Electric discharge) section, [U LD2,U LD1] be D(Discharge, electric discharge) section, (U LD1,U HD1) it is S(Space, idle) section, [U HD1,U HD2] be C(Charge, charging) section, (U HD2,U HD3] be LC(Limited Charge, current-limiting charge) section.U HD3WithU LD3
Respectively direct current system is able to maintain corresponding busbar voltage extreme value when normal operation.U HD2WithU LD2Respectively mixed energy storage system
Charging current and discharge current busbar voltage corresponding when reaching capacity, to guarantee the good work of mixed energy storage system,U HD2
WithU LD2± the 5% of DC bus voltage rating should be usually taken within the maximum fluctuation range that busbar voltage allows.U HD1WithU LD1The respectively charge threshold level of mixed energy storage system initiation of charge and electric discharge, to avoid DC bus-bar voltageU dcIt is normal to generate
The frequent movement of double active full-bridge converters, usually takes ± 1% ~ ± the 2% of DC bus voltage rating when the fluctuation of very little.U dcFor
DC bus-bar voltage actual value, the working condition of super capacitor are as follows:
(1) whenU dcIn the section LD, DC bus-bar voltage is lower than reference value, and super capacitor works in current limliting discharge condition,
By double active full-bridge converters, DC bus is given the energy to maximum discharge current；
(2) whenU dcIn the section D, DC bus-bar voltage is lower than reference value, and super capacitor works in discharge condition, by double
Active full-bridge converter gives the energy to DC bus with the discharge current that phase shifting control is modulated；
(3) whenU dcIn the section S, DC bus-bar voltage is stablized near reference value, and super capacitor works in idle state,
Energy exchange is not carried out with DC bus；
(4) whenU dcIn the section C, DC bus-bar voltage is higher than reference value, and super capacitor works in charged state, by double
Active full-bridge converter absorbs the energy of DC bus with the charging current that phase shifting control is modulated；
(5) whenU dcIn the section LC, DC bus-bar voltage is higher than reference value, and super capacitor works in current-limiting charge state,
By double active full-bridge converters, the energy of DC bus is absorbed with maximum charging current.
The control method of the lithium battery are as follows: the working condition of setting lithium battery and Buck/Boost reversible transducer determines
Section is designed specifically to: setting super-capacitor voltageU SCFor its reference voltage, subregion is carried out to it,U LS3<U LS2<U LS1<U SC<U HS1<U HS2<U HS3For the voltage threshold of Buck/Boost reversible transducer work.[U LS3,U LS2) be the section LD, [U LS2,U LS1] be
The section D, (U LS1,U HS1) be the section S, [U HS1,U HS2] be the section C, (U HS2,U HS3] it is the section LC.U HS3WithU LS3It is respectively super
Capacitor is able to maintain corresponding voltage extremity when normal operation, is usually determined by the self character of super capacitor.Super-capacitor voltage
Reference valueU SCFor voltage corresponding to its state-of-charge half.U HS2WithU LS2Respectively the current limliting of lithium battery defined is discharged and is filled
Voltage value corresponding to electricity usually takes constant voltage set by super-capacitor voltageU SC± 60% ~ ± 80%.U HD1WithU LD1Respectively lithium
The charge threshold level of battery initiation of charge and electric discharge, the value are combined by the capacity ratio of lithium battery and super capacitor in system and are needed
The charging and discharging lithium battery frequency to be arranged determines, usually takes constant voltage set by super-capacitor voltageU SC± 10% ~ ± 50%, it is set
Fixed [U LS1,U HS1] range is narrower, charging and discharging lithium battery number is more frequent.Citing: super capacitor voltage rating 48V, according to super
Grade capacitor regulation settingU LS3=4V,U HS3=50V,U SC=24V, [U LS1,U HS1] take setting voltageU SC± 50%, thenU LS1=12V,U HS1=When 36V, super capacitor actual value and bigger reference value difference, charging and discharging lithium battery electric current is bigger, configures lithium battery defined
Current limliting electric discharge and the corresponding voltage value of charging beU SC± 80%, thenU LS2=4.8V,U HS2=43.2V。U scFor super capacitor reality
Border voltage, the working condition of lithium battery are as follows:
(1) whenU scIn the section LD, super-capacitor voltage is lower than reference value, and lithium battery work is led in current limliting discharge condition
Buck/Boost reversible transducer is crossed, super capacitor is given the energy to maximum discharge current；
(2) whenU scIn the section D, super-capacitor voltage is lower than reference value, and lithium battery works in discharge condition, passes through
Buck/Boost reversible transducer gives the energy to super capacitor with the discharge current that double-closed-loop control is modulated；
(3) whenU scIn the section S, super-capacitor voltage is stablized near reference value, and lithium battery works in idle state, no
Energy exchange is carried out with super capacitor；
(4) whenU scIn the section C, super-capacitor voltage is higher than reference value, and lithium battery works in charged state, passes through
Buck/Boost reversible transducer absorbs the energy of super capacitor with the charging current that double-closed-loop control is modulated；
(5) whenU scIn the section LC, super-capacitor voltage is higher than reference value, and lithium battery work is led in current-limiting charge state
Buck/Boost reversible transducer is crossed, the energy of super capacitor is absorbed with maximum charging current.
A kind of above-mentioned mixed energy storage system based on double active full-bridge converters, lithium battery and Buck/Boost is two-way
Converter is integrated into module I, super capacitor and double active full-bridge converters is integrated into module II, module I and module II are integrated
For energy-storage module, energy-storage module is suitably matched according to the requirement of direct current system, then by energy-storage module in DC bus
On according to proportion carry out parallel configuration.
Above-mentioned a kind of mixed energy storage system and its control method based on double active full-bridge converters provided by the present invention,
Compared with prior art, possessed advantage is with beneficial effect: (1) by double active full-bridge converters by energy storage device with
DC bus is attached, and is had good electrical isolation performance, is improved the security reliability of mixed energy storage system；(2) double
The voltage rating that there is active full-bridge converter high step-up ratio can reduce energy storage device reduces energy-storage units series connection and excessively causes
Imbalance problem；(3) the mixed energy storage system charge and discharge control scheme described in can make the lithium battery micro- electricity of compensating direct current indirectly
The power swing of net effectively reduces its operating frequency and prolongs its service life.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the mixed energy storage system based on double active full-bridge converters of the present invention.
Fig. 2 is the phase shift closed-loop control system structural schematic diagram of double active full-bridge converters in the present invention.
Fig. 3 is the Double closed-loop of voltage and current structural schematic diagram of Buck/Boost reversible transducer in the present invention.
Fig. 4 is DC bus-bar voltage subregion schematic diagram in the present invention.
Fig. 5 is super-capacitor voltage subregion schematic diagram in the present invention.
In Fig. 4:U DCIndicate DC bus voltage rating；I ES_lim1Indicate the limit value of the discharge current of mixed energy storage system；I ES_lim2Indicate the limit value of the discharge current of mixed energy storage system.
In Fig. 5:U SCIndicate super capacitor voltage rating；I bat_lim1Indicate the limit value of the discharge current of lithium battery；I bat_lim2
Indicate the limit value of the discharge current of lithium battery.
Specific embodiment
Description of specific embodiments of the present invention with reference to the accompanying drawing.
A kind of mixed energy storage system based on double active full-bridge converters, as shown in Figure 1: include super capacitor, lithium battery,
Double active full-bridge converters, Buck/Boost reversible transducer；The super capacitor passes through double active full-bridge converters and direct current
Bus connection, double active full-bridge converters use phase shift closed-loop control；The lithium battery passes through the two-way change of Buck/Boost
Parallel operation is connect with super capacitor, and the Buck/Boost reversible transducer uses Double closed-loop of voltage and current.
Combine above two energy storage device the mixed energy storage system to form a kind of cascade connection type.
The control method of the above-mentioned mixed energy storage system based on double active full-bridge converters is as follows:
The control method of double active full-bridge converters are as follows: phase shift closed-loop control, as shown in Fig. 2, i.e. setting hybrid energy-storing system
It unites and gives reference voltageU refWith DC bus-bar voltageU dcVoltage PI regulator, voltage PI regulator output valve are sent into compared to after
Phase shift duty ratio is obtained after limiterD 1Value, then phase shift duty ratioD 1Pass through phase shift by the output of phase-shift PWM generator
PWM waveform phase-shift PWM modulation is carried out to the switching tubes of double active full-bridge converters.Double active full-bridge converters are phase shift closed loop
Control, it is therefore an objective to by DC bus-bar voltage information, mixed energy storage system output power is automatically adjusted, with stable DC bus electricity
Pressure.
The control method of Buck/Boost reversible transducer are as follows: Double closed-loop of voltage and current, as shown in figure 3, setting
Super capacitor gives reference voltageU sc_refWith super-capacitor voltageU scVoltage PI regulator is sent into compared to after, voltage PI is adjusted
Device output valve obtains lithium battery with reference to output electric current after current limiterI bat_ref, then with lithium battery export electric currentI batPhase
It is sent into electric current pi regulator, dutyfactor value of the electric current pi regulator output valve as Buck/Boost reversible transducer more afterwardsD 2, then dutyfactor valueD 2PWM is carried out by switching tube of the PWM generator output PWM waveform to Buck/Boost reversible transducer
Modulation.Buck/Boost reversible transducer is Double closed-loop of voltage and current, it is therefore an objective to control lithium according to the voltage of super capacitor
The auto charge and discharge of battery maintains the voltage of super capacitor in operating voltage range, to direct-current grid power swing into
Row indirect compensation is effectively prolonged its service life with reducing lithium battery operating frequency.
The control method of super capacitor are as follows: the working condition of setting super capacitor and double active full-bridge converters determines area
Between, it is designed specifically to: setting DC bus-bar voltageU DCFor its voltage rating, subregion is carried out to it,U LD3<U LD2<U LD1<U DC<U HD1
<U HD2<U HD3For the voltage threshold of double active full-bridge converter work.[U LD3,U LD2) it is LD(Limited Discharge, current limliting
Electric discharge) section, [U LD2,U LD1] be D(Discharge, electric discharge) section, (U LD1,U HD1) it is S(Space, idle) section, [U HD1,U HD2] be C(Charge, charging) section, (U HD2,U HD3] be LC(Limited Charge, current-limiting charge) section.U HD3WithU LD3
Respectively direct current system is able to maintain corresponding busbar voltage extreme value when normal operation.U HD2WithU LD2Respectively mixed energy storage system
Charging current and discharge current busbar voltage corresponding when reaching capacity, to guarantee the good work of mixed energy storage system,U HD2
WithU LD2± the 5% of DC bus voltage rating should be usually taken within the maximum fluctuation range that busbar voltage allows.U HD1WithU LD1The respectively charge threshold level of mixed energy storage system initiation of charge and electric discharge, to avoid DC bus-bar voltageU dcIt is normal to generate
The frequent movement of double active full-bridge converters, usually takes ± 1% ~ ± the 2% of DC bus voltage rating when the fluctuation of very little.U dcFor
DC bus-bar voltage actual value, as shown in figure 5, the working condition of super capacitor are as follows:
(1) whenU dcIn the section LD, DC bus-bar voltage is lower than reference value, and super capacitor works in current limliting discharge condition,
By double active full-bridge converters, DC bus is given the energy to maximum discharge current；
(2) whenU dcIn the section D, DC bus-bar voltage is lower than reference value, and super capacitor works in discharge condition, by double
Active full-bridge converter gives the energy to DC bus with the discharge current that phase shifting control is modulated；
(3) whenU dcIn the section S, DC bus-bar voltage is stablized near reference value, and super capacitor works in idle state,
Energy exchange is not carried out with DC bus；
(4) whenU dcIn the section C, DC bus-bar voltage is higher than reference value, and super capacitor works in charged state, by double
Active full-bridge converter absorbs the energy of DC bus with the charging current that phase shifting control is modulated；
(5) whenU dcIn the section LC, DC bus-bar voltage is higher than reference value, and super capacitor works in current-limiting charge state,
By double active full-bridge converters, the energy of DC bus is absorbed with maximum charging current.
The control method of the lithium battery are as follows: the working condition of setting lithium battery and Buck/Boost reversible transducer determines
Section is designed specifically to: setting super-capacitor voltageU SCFor its reference voltage, subregion is carried out to it,U LS3<U LS2<U LS1<U SC<U HS1<U HS2<U HS3For the voltage threshold of Buck/Boost reversible transducer work.[U LS3,U LS2) be the section LD, [U LS2,U LS1] be
The section D, (U LS1,U HS1) be the section S, [U HS1,U HS2] be the section C, (U HS2,U HS3] it is the section LC.U HS3WithU LS3It is respectively super
Capacitor is able to maintain corresponding voltage extremity when normal operation, is usually determined by the self character of super capacitor.Super-capacitor voltage
Reference valueU SCFor voltage corresponding to its state-of-charge half.U HS2WithU LS2Respectively the current limliting of lithium battery defined is discharged and is filled
Voltage value corresponding to electricity usually takes constant voltage set by super-capacitor voltageU SC± 60% ~ ± 80%.U HD1WithU LD1Respectively lithium
The charge threshold level of battery initiation of charge and electric discharge, the value are combined by the capacity ratio of lithium battery and super capacitor in system and are needed
The charging and discharging lithium battery frequency to be arranged determines, usually takes constant voltage set by super-capacitor voltageU SC± 10% ~ ± 50%, it is set
Fixed [U LS1,U HS1] range is narrower, charging and discharging lithium battery number is more frequent.Citing: super capacitor voltage rating 48V, according to super
Grade capacitor regulation settingU LS3=4V,U HS3=50V,U SC=24V, [U LS1,U HS1] take setting voltageU SC± 50%, thenU LS1=12V,U HS1=When 36V, super capacitor actual value and bigger reference value difference, charging and discharging lithium battery electric current is bigger, configures lithium battery defined
Current limliting electric discharge and the corresponding voltage value of charging beU SC± 80%, thenU LS2=4.8V,U HS2=43.2V。U scFor super capacitor reality
Border voltage, the working condition of lithium battery are as follows:
(1) whenU scIn the section LD, super-capacitor voltage is lower than reference value, and lithium battery work is led in current limliting discharge condition
Buck/Boost reversible transducer is crossed, super capacitor is given the energy to maximum discharge current；
(2) whenU scIn the section D, super-capacitor voltage is lower than reference value, and lithium battery works in discharge condition, passes through
Buck/Boost reversible transducer gives the energy to super capacitor with the discharge current that double-closed-loop control is modulated；
(3) whenU scIn the section S, super-capacitor voltage is stablized near reference value, and lithium battery works in idle state, no
Energy exchange is carried out with super capacitor；
(4) whenU scIn the section C, super-capacitor voltage is higher than reference value, and lithium battery works in charged state, passes through
Buck/Boost reversible transducer absorbs the energy of super capacitor with the charging current that double-closed-loop control is modulated；
(5) whenU scIn the section LC, super-capacitor voltage is higher than reference value, and lithium battery work is led in current-limiting charge state
Buck/Boost reversible transducer is crossed, the energy of super capacitor is absorbed with maximum charging current.
A kind of above-mentioned mixed energy storage system based on double active full-bridge converters, lithium battery and Buck/Boost is two-way
Converter is integrated into module I, super capacitor and double active full-bridge converters is integrated into module II, module I and module II are integrated
For energy-storage module, energy-storage module is suitably matched according to the requirement of direct current system, then by energy-storage module in DC bus
On according to proportion carry out parallel configuration.
Claims (3)
1. a kind of mixed energy storage system based on double active full-bridge converters, it is characterised in that: including super capacitor, lithium battery,
Double active full-bridge converters, Buck/Boost reversible transducer and DC bus；The super capacitor passes through double active full-bridges
Converter is connect with DC bus, and double active full-bridge converters use phase shift closed-loop control；The lithium battery passes through Buck/
Boost reversible transducer is connect with super capacitor, and the Buck/Boost reversible transducer uses voltage and current double closed-loop control
System.
2. a kind of mixed energy storage system based on double active full-bridge converters according to claim 1, it is characterised in that: lithium
Battery and Buck/Boost reversible transducer are integrated into module I, and super capacitor and double active full-bridge converters are integrated into module II,
The module I and module II are integrated into energy-storage module, and the energy-storage module is suitably matched according to the requirement of direct current system,
Then energy-storage module is subjected to parallel configuration according to proportion on DC bus.
3. a kind of control method of mixed energy storage system based on double active full-bridge converters according to claim 1,
It is characterized in that:
The control method of double active full-bridge converters are as follows: phase shift closed-loop control, i.e. setting mixed energy storage system give reference voltageU refWith DC bus-bar voltageU dcVoltage PI regulator is sent into compared to after, voltage PI regulator output valve obtains after limiter
Phase shift duty ratio outD 1Value, then phase shift duty ratioD 1The PWM waveform Jing Guo phase shift is exported to double by phase-shift PWM generator
The switching tube of active full-bridge converter carries out phase-shift PWM modulation；
The control method of Buck/Boost reversible transducer are as follows: Double closed-loop of voltage and current, the i.e. given ginseng of setting super capacitor
Examine voltageU sc_refWith super-capacitor voltageU scVoltage PI regulator is sent into compared to after, voltage PI regulator output valve is by electricity
Obtain lithium battery with reference to output electric current after stream limiterI bat_ref, then with lithium battery export electric currentI batElectric current is sent into compared to after
Pi regulator, dutyfactor value of the electric current pi regulator output valve as Buck/Boost reversible transducerD 2, then dutyfactor valueD 2
PWM modulation is carried out by switching tube of the PWM generator output PWM waveform to Buck/Boost reversible transducer；
The control method of super capacitor are as follows: the working condition of setting super capacitor and double active full-bridge converters determines section, tool
Body design are as follows: setting DC bus-bar voltageU DCFor its voltage rating, subregion is carried out to it,U LD3<U LD2<U LD1<U DC<U HD1<U HD2<U HD3For the voltage threshold of double active full-bridge converter work；[U LD3,U LD2) be the section LD, [U LD2,U LD1] be the section D, (U LD1,U HD1) be the section S, [U HD1,U HD2] be the section C, (U HD2,U HD3] it is the section LC；U HD3WithU LD3Respectively direct current system is able to maintain just
Often corresponding busbar voltage extreme value when operation；U HD2WithU LD2Respectively the charging current of mixed energy storage system and discharge current reach
Corresponding busbar voltage when the limit；U HD1WithU LD1The respectively charge threshold level of mixed energy storage system initiation of charge and electric discharge,U dcFor DC bus-bar voltage actual value, the working condition of super capacitor are as follows:
(1) whenU dcIn the section LD, DC bus-bar voltage is lower than reference value, and super capacitor works in current limliting discharge condition, passes through
Double active full-bridge converters, give the energy to DC bus with maximum discharge current；
(2) whenU dcIn the section D, DC bus-bar voltage is lower than reference value, and super capacitor works in discharge condition, by double active
Full-bridge converter gives the energy to DC bus with the discharge current that phase shifting control is modulated；
(3) whenU dcIn the section S, DC bus-bar voltage stablize near reference value, super capacitor work in idle state, not with
DC bus carries out energy exchange；
(4) whenU dcIn the section C, DC bus-bar voltage is higher than reference value, and super capacitor works in charged state, by double active
Full-bridge converter absorbs the energy of DC bus with the charging current that phase shifting control is modulated；
(5) whenU dcIn the section LC, DC bus-bar voltage is higher than reference value, and super capacitor works in current-limiting charge state, passes through
Double active full-bridge converters absorb the energy of DC bus with maximum charging current；
The control method of lithium battery are as follows: the working condition of setting lithium battery and Buck/Boost reversible transducer determines section, tool
Body design are as follows: setting super-capacitor voltageU SCFor its reference voltage, subregion is carried out to it,U LS3<U LS2<U LS1<U SC<U HS1<U HS2<U HS3For the voltage threshold of Buck/Boost reversible transducer work；[U LS3,U LS2) be the section LD, [U LS2,U LS1] it is the section D,
(U LS1,U HS1) be the section S, [U HS1,U HS2] be the section C, (U HS2,U HS3] it is the section LC；U HS3WithU LS3Position super capacitor energy respectively
Corresponding voltage extremity when keeping operating normally；U HS2WithU LS2The respectively current limliting electric discharge and charging voltage of super capacitor defined
Threshold value；U HD1WithU LD1The respectively charge threshold level of lithium battery initiation of charge and electric discharge,U scFor super capacitor virtual voltage, lithium electricity
The working condition in pond are as follows:
(1) whenU scIn the section LD, super-capacitor voltage is lower than reference value, and lithium battery works in current limliting discharge condition, passes through
Buck/Boost reversible transducer gives the energy to super capacitor with maximum discharge current；
(2) whenU scIn the section D, super-capacitor voltage is lower than reference value, and lithium battery works in discharge condition, passes through Buck/
Boost reversible transducer gives the energy to super capacitor with the discharge current that double-closed-loop control is modulated；
(3) whenU scIn the section S, super-capacitor voltage is stablized near reference value, and lithium battery works in idle state, not with it is super
Grade capacitor carries out energy exchange；
(4) whenU scIn the section C, super-capacitor voltage is higher than reference value, and lithium battery works in charged state, passes through Buck/
Boost reversible transducer absorbs the energy of super capacitor with the charging current that double-closed-loop control is modulated；
(5) whenU scIn the section LC, super-capacitor voltage is higher than reference value, and lithium battery works in current-limiting charge state, passes through
Buck/Boost reversible transducer absorbs the energy of super capacitor with maximum charging current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710429836.7A CN107069695B (en) | 2017-06-09 | 2017-06-09 | A kind of mixed energy storage system and its control method based on double active full-bridge converters |
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| CN108306281A (en) * | 2018-03-05 | 2018-07-20 | 国网山西省电力公司电力科学研究院 | A kind of four Port Translation device of part isolated form and its control method based on two-way full-bridge DC/DC converters |
| CN108631603B (en) * | 2018-05-25 | 2022-04-12 | 哈尔滨工程大学 | Control method for suppressing direct current bus voltage oscillation based on full-bridge converter |
| CN110719028B (en) | 2018-07-13 | 2021-03-19 | 台达电子工业股份有限公司 | Compensation control system and method |
| CN108879651B (en) * | 2018-07-16 | 2020-08-28 | 上海海事大学 | DAB-based high-power dual-modular hybrid energy storage system and grid connection method |
| CN109274271B (en) * | 2018-10-16 | 2020-01-07 | 哈尔滨工业大学 | Two-stage isolation type DC three-port converter and hybrid energy storage control method thereof |
| CN111245231B (en) * | 2020-01-17 | 2021-08-03 | 东莞南方半导体科技有限公司 | Boost mode constant voltage control method and circuit of soft switch bidirectional direct current converter |
| CN111211692B (en) * | 2020-01-17 | 2021-08-06 | 东莞南方半导体科技有限公司 | Boost mode constant power control method and circuit of soft switch bidirectional direct current converter |
| CN111181398A (en) * | 2020-01-17 | 2020-05-19 | 东莞市恒信第三代半导体研究院 | Voltage reduction mode constant power control method and circuit of soft switch bidirectional direct current converter |
| CN111064365A (en) * | 2020-01-17 | 2020-04-24 | 东莞市恒信第三代半导体研究院 | Voltage reduction mode constant voltage control method and circuit of soft switch bidirectional direct current converter |
| CN111384756B (en) * | 2020-03-30 | 2022-05-03 | 南京国电南自新能源科技有限公司 | Voltage-sharing control method and system for rail transit super capacitor energy storage system |
| CN112865063B (en) * | 2021-01-12 | 2023-02-21 | 中铁电气化局集团有限公司 | Energy router, vehicle operation control method, and storage medium |
| CN113783251B (en) * | 2021-08-26 | 2024-04-16 | 四川科陆新能电气有限公司 | Virtual internal resistance regulating circuit for balancing among battery clusters |
| CN114744886B (en) * | 2022-05-06 | 2024-06-14 | 太原理工大学 | Intelligent PI control method of double-active full-bridge converter |
| CN115021302B (en) * | 2022-08-09 | 2022-11-22 | 四川大学 | Control method of megawatt hybrid energy storage device with electric energy quality regulation function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685232A (en) * | 2017-01-16 | 2017-05-17 | 上海交通大学 | Modulation method with high efficiency in dual-active full-bridge converter full power range |
| CN106786694A (en) * | 2016-12-21 | 2017-05-31 | 太原理工大学 | A kind of bipolarity direct-current grid mixed energy storage system control method for coordinating |
| CN106787761A (en) * | 2016-12-30 | 2017-05-31 | 西安交通大学 | A kind of transient current control method of the full-bridge direct current converter based on triple phase shifts |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786694A (en) * | 2016-12-21 | 2017-05-31 | 太原理工大学 | A kind of bipolarity direct-current grid mixed energy storage system control method for coordinating |
| CN106787761A (en) * | 2016-12-30 | 2017-05-31 | 西安交通大学 | A kind of transient current control method of the full-bridge direct current converter based on triple phase shifts |
| CN106685232A (en) * | 2017-01-16 | 2017-05-17 | 上海交通大学 | Modulation method with high efficiency in dual-active full-bridge converter full power range |
Non-Patent Citations (1)
| Title |
|---|
| 交直流混合微电网关键技术及其示范工程;任春光 等；;《太原理工大学学报》;20170531;第48卷(第3期);第486-491页 * |
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