CN106159981A - A kind of mixed energy storage system and micro-grid system - Google Patents
A kind of mixed energy storage system and micro-grid system Download PDFInfo
- Publication number
- CN106159981A CN106159981A CN201510178136.6A CN201510178136A CN106159981A CN 106159981 A CN106159981 A CN 106159981A CN 201510178136 A CN201510178136 A CN 201510178136A CN 106159981 A CN106159981 A CN 106159981A
- Authority
- CN
- China
- Prior art keywords
- parameter value
- energy storage
- storage device
- discharge
- parameter
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Embodiments provide a kind of mixed energy storage system and micro-grid system, in order to solve in existing mixed energy storage system, owing to needing to be determined the charge-discharge electric power of accumulator cell charging and discharging power and super capacitor by energy management unit, thus the system caused realizes more complicated problem.First kind bidirectional power converter in this system, when the parameter value of the physical parameter on bus changes, changes charge/discharge rates when first kind energy storage device carries out discharge and recharge according to the rate of change of default charge/discharge rates；During until the parameter value of physical parameter is equal to the first parameter value or is equal to the second parameter value, charge/discharge rates when first kind energy storage device is carried out discharge and recharge no longer changes；Equations of The Second Kind bidirectional power converter, during for arriving the boundary value of preset range at parameter value, carries out discharge and recharge to Equations of The Second Kind energy storage device so that parameter value maintains the boundary value of preset range, the first parameter value and the second parameter value and is respectively positioned in described preset range.
Description
Technical field
The present invention relates to electric and electronic technical field, particularly relate to a kind of mixed energy storage system and micro-capacitance sensor system
System.
Background technology
At present in island and remote districts, general employing micro-capacitance sensor is powered, and i.e. relies primarily on photovoltaic generation, wind
The novel energy generatings such as power generating, tidal power generation.Because the intermittence of these new forms of energy, these new forms of energy are also
It is not provided that persistently reliable power supply, therefore, micro-grid system needs energy-storage system to maintain the steady of electric energy
Fixed.
At present, general accumulator and the super capacitor composition mixed energy storage system of using, storage battery energy density height,
But high current charge-discharge can shorten its life-span continually, and super capacitor charge-discharge electric power is big, has extended cycle life,
But energy density is little.Use accumulator and super capacitor composition mixed energy storage system can make full use of accumulator
With super
Micro-grid system shown in Fig. 1 include mixed energy storage system 11, load 12, photovoltaic generating system 13,
Wind generator system 14, wherein, mixed energy storage system 11 includes accumulator, super capacitor, energy management
Unit 15, the bidirectional power converter 1 being connected with accumulator and AC/DC bus and super capacitor and straight
The bidirectional power converter 2 that stream/ac bus is connected, wherein, energy management unit 15 obtains wind-force respectively
Electricity generation system exports power P w of AC/DC bus, and photovoltaic generating system 13 output is to AC/DC
Power P v of bus, power P l of load 12 consumption, so that it is determined that the charge-discharge electric power of energy-storage system 11
Pw+Pv-Pl (when Pw+Pv-Pl is more than 0, determines the charge power of energy-storage system 11；Work as Pw+Pv-Pl
During less than 0, determine the discharge power of energy-storage system 11)；And the charge-discharge electric power determined is carried out low pass filtered
Ripple, obtains accumulator cell charging and discharging power, then by the charge-discharge electric power determined and the charge-discharge electric power of accumulator
Difference as the charge-discharge electric power of super capacitor；Bidirectional power converter 1 is according to the charge-discharge electric power of accumulator
Accumulator is carried out discharge and recharge, bidirectional power converter 2 according to the charge-discharge electric power of super capacitor to super electricity
Hold and carry out discharge and recharge.It is to say, the height after determining charge-discharge electric power, in the charge-discharge electric power determined
Frequency part is as accumulator cell charging and discharging power, and the low frequency part in the charge-discharge electric power determined is as super capacitor
Charge-discharge electric power.
Energy management unit needs to gather each input source and the electric current of load, voltage, calculates various source and bears
The power carried, then the power that the most just can obtain accumulator and super capacitor is given.This is accomplished by increasing
Electric current, voltage sampling circuit or increase high speed communication line ability between input source, load and energy management unit
Realize, and be also required between energy management unit and bidirectional power converter 1, bidirectional power converter 2
There is order wire at a high speed.System realizes more complicated, and hardware cost is high, and order wire is easily disturbed, reliably
Property is poor.Connecting additionally, due to need holding wire between each unit circuit, putting position is limited, unfavorable
In in the application being applied to distributed power generation occasion.
In sum, in existing mixed energy storage system, need to be determined accumulator by energy management unit
Charge-discharge electric power and the charge-discharge electric power of super capacitor, it is more complicated that this can cause system to realize, and order wire is easily subject to
Interference, reliability is poor, and limits the network system application scenario using mixed energy storage system.
Summary of the invention
Embodiments provide a kind of mixed energy storage system and micro-grid system, in order to solve existing
In mixed energy storage system, owing to needs are determined accumulator cell charging and discharging power and super electricity by energy management unit
The charge-discharge electric power held, it is more complicated that this can cause system to realize, and limits the electrical network using mixed energy storage system
System application scenario.
Based on the problems referred to above, a kind of mixed energy storage system that the embodiment of the present invention provides, two-way including the first kind
Power inverter, first kind energy storage device, Equations of The Second Kind bidirectional power converter and Equations of The Second Kind energy storage device；Institute
State first kind bidirectional power converter, for obtaining the parameter value of the physical parameter on bus, and in described ginseng
When numerical value changes, change according to the rate of change of default charge/discharge rates and first kind energy storage device is carried out
Charge/discharge rates during discharge and recharge；Until the parameter value of described physical parameter equal to the first parameter value or is equal to
During the second parameter value, charge/discharge rates when first kind energy storage device is carried out discharge and recharge no longer changes；Described
Equations of The Second Kind bidirectional power converter, for obtaining the parameter value of described physical parameter, and arrives at described parameter value
When reaching the boundary value of preset range, Equations of The Second Kind energy storage device is carried out discharge and recharge so that described parameter value maintains
It is respectively positioned on described preset range at the boundary value of preset range, described first parameter value and described second parameter value
In.
A kind of micro-grid system that the embodiment of the present invention provides, the hybrid energy-storing provided including the embodiment of the present invention
System.
The beneficial effect of the embodiment of the present invention includes:
First kind bidirectional power converter in the mixed energy storage system that the embodiment of the present invention provides is on bus
The parameter value of physical parameter control first kind energy storage device to the physical parameter on bus when changing
The change of parameter value carries out slow response, thus avoids the charging and discharging currents pace of change of first kind energy storage device
Too fast, Equations of The Second Kind bidirectional power converter reaches the boundary value time control of preset range at the parameter value of described parameter
The change of the parameter value of described physical parameter is quickly responded by Equations of The Second Kind energy storage device processed, so that it is guaranteed that institute
State parameter value without departing from preset range, owing to this mixed energy storage system need not energy management unit, because of
This simplifies the structure of system, improves anti-interference and the reliability of system, extends employing hybrid energy-storing
The network system application scenario of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of micro-grid system of the prior art；
The structural representation of the mixed energy storage system that Fig. 2 provides for the embodiment of the present invention；
When Fig. 3 applies in practice for the mixed energy storage system that the embodiment of the present invention provides, along with load consumption
The change of power of power and electricity generation system output, the change of the voltage on dc bus, the first kind is two-way
The schematic diagram of the change of the change of the electric current of power inverter and the electric current of Equations of The Second Kind bidirectional power converter.
Detailed description of the invention
First kind bidirectional power converter in the mixed energy storage system that the embodiment of the present invention provides is on bus
The parameter value of physical parameter control first kind energy storage device to the physical parameter on bus when changing
The change of parameter value carries out slow response, and Equations of The Second Kind bidirectional power converter reaches at the parameter value of described parameter
Control Equations of The Second Kind energy storage device during the boundary value of preset range the change of the parameter value of described physical parameter is entered
Row quickly response, the charging and discharging currents pace of change that the most both can avoid first kind energy storage device is too fast, again
May insure that described parameter value, without departing from preset range, and also need not energy management unit, thus
The structure of system is simplified in the case of systematic function is constant.
Below in conjunction with Figure of description, a kind of mixed energy storage system that the embodiment of the present invention is provided and micro-capacitance sensor
The detailed description of the invention of system illustrates.
A kind of mixed energy storage system that the embodiment of the present invention provides, as in figure 2 it is shown, include the two-way merit of the first kind
Rate changer 21, first kind energy storage device 22, Equations of The Second Kind bidirectional power converter 23 and Equations of The Second Kind accumulator
Part 24；
First kind bidirectional power converter 21, for obtaining the parameter value of the physical parameter on bus 25, and
When described parameter value changes, change first kind energy storage according to the rate of change of default charge/discharge rates
Device 22 carries out charge/discharge rates during discharge and recharge；Until the parameter value of described physical parameter is equal to the first ginseng
Numerical value or during equal to the second parameter value, discharge and recharge speed when first kind energy storage device 22 is carried out discharge and recharge
Degree no longer changes；
Equations of The Second Kind bidirectional power converter 23, for obtaining the parameter value of described physical parameter, and in described ginseng
When numerical value arrives the boundary value of preset range, Equations of The Second Kind energy storage device 24 is carried out discharge and recharge so that described
Parameter value maintains the boundary value of preset range, described first parameter value and described second parameter value and is respectively positioned on institute
State in preset range.
Wherein, according to the rate of change change of default charge/discharge rates, first kind energy storage device 22 is filled
Charge/discharge rates during electric discharge includes two kinds of situations, and the first situation is: according to the change of default charging rate
Rate changes charging rate when being charged first kind energy storage device 22；The second situation is: according to
The rate of change of the velocity of discharge preset changes velocity of discharge when discharging first kind energy storage device 22.
Also including electricity generation system 26 and load 27 in Fig. 2, wherein electricity generation system 26 can be wind power system,
Can also be solar power system, it is also possible to be other can be what other energy was converted to electric energy
System.
In the energy-storage system that the embodiment of the present invention provides, when described first kind energy storage device is on described bus
The power of output and electricity generation system export the merit equal to described load consumption of the power sum on described bus
During rate, the parameter value of the physical parameter on described bus is the second parameter value；When described first kind energy storage device
The power absorbed from described bus exports institute with the power sum of described load consumption equal to electricity generation system
When stating the power on bus, the parameter value of described physical parameter is the first parameter value.Wherein, the first parameter value
More than the second parameter value, and the first parameter value and second this parameter value are all in preset range.
Wherein, the energy density of first kind energy storage device is higher than the energy density of Equations of The Second Kind energy storage device.In reality
In border, first kind energy storage device can be accumulator, such as lead-acid accumulator, lithium battery etc., first kind energy storage
The feature of device is that energy density is high, but large current charge, electric discharge can shorten its life-span continually, charging,
Velocity of discharge rate of change also can shorten its life-span too greatly；Equations of The Second Kind energy storage device can be super capacitor, flywheel
Batteries etc., the feature of Equations of The Second Kind energy storage device is that energy density is low, and charging, discharge power are big, cycle life
Long.
First kind energy storage device in the energy-storage system that the embodiment of the present invention provides can have multiple, and multiple
First kind energy storage device can be different, and such as, first kind energy storage device includes a lead-acid accumulator,
One lithium battery, or include two lead-acid accumulators, correspondingly, first kind bidirectional power converter also may be used
Multiple to have, and each first kind bidirectional power converter can arrange the change of different charge/discharge rates
Rate, the first parameter value, the second parameter value, thus control different Equations of The Second Kind energy storage device charge and discharge energy.This
Equations of The Second Kind energy storage device in the energy-storage system that inventive embodiments provides can have multiple, and multiple Equations of The Second Kind
Energy storage device can be different, and such as, Equations of The Second Kind energy storage device includes a super capacitor, a flywheel
Battery, or include two super capacitors, correspondingly, Equations of The Second Kind bidirectional power converter can also have multiple,
And each Equations of The Second Kind bidirectional power converter can arrange the boundary value of different preset range, thus controls
Different Equations of The Second Kind energy storage device charge and discharge energy.
Mixed energy storage system shown in Fig. 2 is only with a first kind bidirectional power converter, a first kind storage
Illustrate as a example by energy device, an Equations of The Second Kind bidirectional power converter and an Equations of The Second Kind energy storage device.
In the mixed energy storage system shown in Fig. 2, the first kind connecting bus and first kind energy storage device is two-way
Power inverter, when the parameter value of the physical parameter on bus changes, according to default discharge and recharge speed
The rate of change of degree changes charge/discharge rates when first kind energy storage device carries out discharge and recharge, thus responds bus
On the change of eigenvalue of voltage, and avoid the charging and discharging currents pace of change mistake of first kind energy storage device
Hurry up；And owing to the charging and discharging currents pace of change of first kind energy storage device is relatively slow, therefore, described physical parameter
Parameter value can change to the boundary value of preset range, now, connect the of bus and Equations of The Second Kind energy storage device
Two class bidirectional power converters carry out discharge and recharge to Equations of The Second Kind energy storage device so that the parameter of described physical parameter
Value maintains the boundary value of preset range；Until the parameter value of described physical parameter equal to the first parameter value or
During equal to the second parameter value, charge/discharge rates when first kind energy storage device is carried out discharge and recharge no longer changes.
Electric current (or power) rate of change of first kind bidirectional power converter, namely to first kind accumulator
The rate of change of charge/discharge rates when part carries out discharge and recharge, can be carried out according to the capacity of first kind energy storage device
Set, be also required to the parameter value considering the physical parameter on bus power (the generating system to load consumption simultaneously
The power of system output) the sensitivity of change.Electric current (or power) change of first kind bidirectional power converter
Rate is the least, when the changed power that power or the electricity generation system of load consumption export, and the physical parameter on bus
Parameter value the most easily change, the parameter value of the physical parameter on bus is to (or the generating of the power of load consumption
The power of system output) the sensitivity of change the highest；Otherwise, the electric current of first kind bidirectional power converter
(or power) rate of change is big, and the parameter value of the physical parameter on bus is to the power of load consumption (or generating system
The power of system output) the sensitivity of change the lowest.
When bus 25 is dc bus, the physical parameter on bus 25 can be the voltage on bus 25；
When bus 25 is ac bus, the physical parameter on bus 25 can be having of the voltage on bus 25
Valid value, it is also possible to for the peak value of the voltage on bus 25, it is also possible to for the frequency of the voltage on bus 25.
Alternatively, first kind bidirectional power converter specifically for: obtain the parameter of physical parameter on bus
Value；When first kind energy storage device more than the first parameter value and is charged by the parameter value of described physical parameter,
The charging rate to the charging of first kind energy storage device is increased according to the rate of change of default charging rate, until institute
When stating the parameter value of physical parameter equal to the first parameter value, charging when first kind energy storage device is charged
Speed no longer changes.
Alternatively, described first kind bidirectional power converter specifically for: obtain physical parameter on bus
Parameter value；Parameter value in described physical parameter is less than the first parameter value and charges first kind energy storage device
Time, reduce the charging rate to the charging of first kind energy storage device according to the rate of change of default charging rate, directly
When parameter value to described physical parameter is equal to the first parameter value, when first kind energy storage device is charged
Charging rate no longer changes.
If the charging rate of first kind energy storage device charging is reduced to zero, the parameter value of described physical parameter
Also less than described first parameter value, then first kind bidirectional power converter is according to the change of the default velocity of discharge
Rate increases the velocity of discharge to the electric discharge of first kind energy storage device (now, at the beginning of the electric discharge of first kind energy storage device
The beginning velocity of discharge is zero), until the parameter value of described physical parameter is equal to described second parameter value.
Alternatively, described first kind bidirectional power converter specifically for: obtain physical parameter on bus
Parameter value；Parameter value in described physical parameter is less than the second parameter value and discharges first kind energy storage device
Time, increase the velocity of discharge to the electric discharge of first kind energy storage device according to the rate of change of the default velocity of discharge, directly
When parameter value to described physical parameter is equal to described second parameter value, first kind energy storage device is discharged
Time the velocity of discharge no longer change.
Alternatively, described first kind bidirectional power converter specifically for: obtain physical parameter on bus
Parameter value；Parameter value in described physical parameter is more than the second parameter value and discharges first kind energy storage device
Time, reduce the velocity of discharge to the electric discharge of first kind energy storage device according to the rate of change of the default velocity of discharge, directly
When parameter value to described physical parameter is equal to described second parameter value, first kind energy storage device is discharged
Time the velocity of discharge no longer change.
If the velocity of discharge of first kind energy storage device electric discharge is reduced to zero, the parameter value of described physical parameter
Also greater than described second parameter value, then, first kind bidirectional power converter is according to default charging rate
Rate of change increases the charging rate to the charging of first kind energy storage device, and (now, first kind energy storage device charges
Initial charge speed is zero), until the parameter value of described physical parameter is equal to described first parameter value.
Therefore, the first kind bidirectional power converter being connected with first kind energy storage device is operated in current source mould
Formula, the electric current (or power) of its output (or absorption) can be according to the parameter value of the physical parameter on bus
Change regulates slowly, and so, the charging and discharging currents that on the one hand can avoid first kind energy storage device is fast
Speed change, meanwhile, when the power of electricity generation system output or the power of load consumption change, affiliated thing
The parameter value of reason parameter can change significantly, in order to is examined by the change of the parameter value of described physical parameter
Measure the situation of change of the power of the electrical network of the mixed energy storage system that the application embodiment of the present invention provides.
When the rate of change of the charging rate during charging of first kind energy storage device discharges with first kind energy storage device
The rate of change of the velocity of discharge can be equal, it is also possible to unequal.
Alternatively, described Equations of The Second Kind bidirectional power converter specifically for: obtain the parameter of described physical parameter
Value；When described parameter value arrives the maximum of preset range, Equations of The Second Kind energy storage device is charged, makes
Obtain described parameter value and maintain the maximum of preset range；The minima of preset range is arrived at described parameter value
Time, Equations of The Second Kind energy storage device is discharged so that described parameter value maintains the minima of preset range.
Therefore, the Equations of The Second Kind bidirectional power converter being connected with Equations of The Second Kind energy storage device is operated in voltage source mould
Formula, when the parameter value of described physical parameter reaches the maximum of preset range, can control Equations of The Second Kind accumulator
Part absorbs transient power, when the parameter value of described physical parameter reaches the minima of preset range, can control
Equations of The Second Kind energy storage device output transient power, so that the parameter value of described physical parameter is in preset range.
First kind bidirectional power converter in the mixed energy storage system that the embodiment of the present invention provides and the first kind
The battery energy storage unit that energy storage device is constituted, with Equations of The Second Kind bidirectional power converter and Equations of The Second Kind energy storage device structure
Between the capacitor storage unit become separate, without even between battery energy storage unit and capacitor storage unit
Line, therefore, the putting position of both is the most flexible；Further, battery energy storage unit and capacitor storage unit with
All without line between electricity generation system, all without even between battery energy storage unit and capacitor storage unit and load
Line.The quantity of the first kind energy storage device in the mixed energy storage system that the embodiment of the present invention provides and Equations of The Second Kind storage
The quantity of energy device can the most freely configure.
Changing with the power of the load consumption of connection dc bus below, it is female that electricity generation system exports direct current
As a example by the constant application scenarios of the power on line, further illustrate the hybrid energy-storing that the embodiment of the present invention provides
System, the physical parameter on this application scenarios median generatrix is the voltage on bus.
In this application scenarios, time initial, the power that electricity generation system exports on dc bus disappears more than load
The power of consumption, therefore, time initial, the voltage on dc bus is VBH.Part B in Fig. 3 is that load disappears
The time dependent schematic diagram of power that the power of consumption exports with electricity generation system, wherein, solid line represents that load disappears
The time dependent curve of power of consumption, dotted line represents the time dependent song of power that electricity generation system exports
Line.Part A in Fig. 3 is the change of the power along with load consumption and the power of electricity generation system output, directly
The schematic diagram of the change of the voltage on stream bus, wherein, the minima of preset range is VCL, preset range
Maximum be VCH, the first parameter value is VBH, the second parameter value is VBL.C portion in Fig. 3 is
The electric current of Equations of The Second Kind bidirectional power converter is along with the schematic diagram of the change in voltage on dc bus, in Fig. 3
D part is that the electric current of first kind bidirectional power converter is along with the schematic diagram of the change in voltage on dc bus.
As it is shown on figure 3, in the t1 moment, the power of load consumption increases, and now electricity generation system is to dc bus
The power of output is less than the power of load consumption.Current value due to the charging of first kind bidirectional power converter
Slowly, therefore the voltage of dc bus can reduce rapidly in (i.e. the charging rate of first kind energy storage device) change
To the minima of preset range, i.e. VCLTime, Equations of The Second Kind bidirectional power converter quickly responds, and exports electric current
Make the voltage stabilization of dc bus at VCL.In time period between the t1 moment to t2 moment, first
The current value of class bidirectional power converter charging persistently reduces (the i.e. charging rate fall of first kind energy storage device
Low), start to discharge to first kind energy storage device after being reduced to 0, and the current value discharged is the slowest
Become big；In the t1 moment, the current value of Equations of The Second Kind bidirectional power converter electric discharge increases to rapidly certain value, makes
Obtain the voltage stabilization of dc bus at VCL, in the time period between the t1 moment to t2 moment, Equations of The Second Kind is double
Current value to power inverter electric discharge starts to be gradually reduced (i.e. Equations of The Second Kind accumulator from the current value in t1 moment
The velocity of discharge of part reduces).In the t2 moment, the current value of the first bi-directional power conversion electric discharge increases to be equal to
Load desirable value, the voltage recovery of dc bus to VBL, due to VCL<VBL<VCH, the two-way merit of Equations of The Second Kind
Rate changer is operated in Light Condition, and output electric current is 0.
In the t3 moment, the power of load consumption increases further, the electricity of first kind bidirectional power converter charging
Slowly, therefore the voltage of dc bus can be rapidly in flow valuve (i.e. the charging rate of first kind energy storage device) change
It is reduced to the minima of preset range, i.e. VCLTime, Equations of The Second Kind bidirectional power converter quickly responds, output
Electric current makes the voltage stabilization of dc bus at VCL.In time period between the t3 moment to t4 moment,
The current value of first kind bidirectional power converter electric discharge persistently increases (the i.e. velocity of discharge of first kind energy storage device
Improve)；In the t3 moment, the current value of Equations of The Second Kind bidirectional power converter electric discharge increases to rapidly certain value,
Make the voltage stabilization of dc bus at VCL, Equations of The Second Kind in the time period between the t3 moment to t4 moment
The current value of bidirectional power converter electric discharge starts to be gradually reduced (i.e. Equations of The Second Kind energy storage from the current value in t3 moment
The velocity of discharge of device reduces).In the t4 moment, the current value of the first bi-directional power conversion electric discharge increases to
In load desirable value, the voltage recovery of dc bus to VBL, due to VCL<VBL<VCH, Equations of The Second Kind is two-way
Power inverter is operated in Light Condition, and output electric current is 0.
In the t5 moment, the power reduction of load consumption, due to the electric current of first kind bidirectional power converter electric discharge
Slowly, therefore the voltage of dc bus can rise rapidly in value (i.e. the velocity of discharge of first kind energy storage device) change
High most reach value to preset range, i.e. VCH, now, Equations of The Second Kind bidirectional power converter quickly responds, from
Dc bus absorbs electric current, makes the voltage stabilization of dc bus at VCH.Between the t5 moment to t6 moment
Time period in, the first kind bidirectional power converter electric discharge current value persistently reduce (i.e. first kind accumulator
The velocity of discharge of part reduces)；In the t5 moment, the current value of Equations of The Second Kind bidirectional power converter charging increases rapidly
Big to certain value so that the voltage stabilization of dc bus is at VCH, between the t5 moment to t6 moment time
Between in section the current value of Equations of The Second Kind bidirectional power converter charging start to be gradually reduced from the current value in t5 moment
(i.e. the charging rate of Equations of The Second Kind energy storage device reduces).In the t6 moment, the first bi-directional power conversion charging
Current value is reduced to equal to load desirable value, the current path of dc bus to VBL, due to VBL>VCL,
Equations of The Second Kind bidirectional power converter is operated in Light Condition, and output electric current is 0.At t6 moment, two-way changing
Device 1 exports electric current and is reduced to equal to load desirable value, and busbar voltage falls back to VBL, due to VCL
<VBL<VCH, Equations of The Second Kind bidirectional power converter is operated in Light Condition, and output electric current is 0.
In the t7 moment, the power of load consumption reduces further, and the power of now electricity generation system output is more than negative
Carry the power consumed.Current value (i.e. first kind energy storage device due to the electric discharge of first kind bidirectional power converter
The velocity of discharge) change slowly, what therefore the voltage of dc bus can quickly rise to preset range most reaches value,
I.e. VCH, now, Equations of The Second Kind bidirectional power converter quickly responds, and absorbs electric current from dc bus, makes straight
The voltage stabilization of stream bus is at VCH.In time period between the t7 moment to t8 moment, the first kind is two-way
The current value of power inverter electric discharge persistently reduces (i.e. the velocity of discharge of first kind energy storage device reduces), when
Start after being reduced to 0 to charge to first kind energy storage device, and the current value charged the most slowly becomes big；?
In the t7 moment, the current value of Equations of The Second Kind bidirectional power converter charging increases to rapidly certain value so that direct current is female
The voltage stabilization of line is at VCH, in the time period between the t7 moment to t8 moment, Equations of The Second Kind bidirectional power becomes
The current value of parallel operation charging starts to be gradually reduced (the i.e. charging of Equations of The Second Kind energy storage device from the current value in t7 moment
Speed reduces).In the t8 moment, the current value of the first bi-directional power conversion charging increases can sponge generating
The energy of system output is not supported the energy consumed, the current path of dc bus to VBH, due to
VCL<VBH<VCH, Equations of The Second Kind bidirectional power converter is operated in Light Condition, and output electric current is 0.
A kind of micro-grid system that the embodiment of the present invention provides, the hybrid energy-storing provided including the embodiment of the present invention
System.
Through the above description of the embodiments, those skilled in the art is it can be understood that arrive the present invention
Embodiment can be realized by hardware, it is also possible to the mode of the general hardware platform adding necessity by software is come real
Existing.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product
Come, this software product can be stored in a non-volatile memory medium (can be CD-ROM, USB flash disk,
Portable hard drive etc.) in, including some instructions with so that computer equipment (can be personal computer,
Server, or the network equipment etc.) perform the method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the mould in accompanying drawing
Block or flow process are not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in the device in embodiment can describe according to embodiment
Carry out being distributed in the device of embodiment, it is also possible to carry out respective change and be disposed other than one of the present embodiment
Or in multiple device.The module of above-described embodiment can merge into a module, it is also possible to is further split into
Multiple submodules.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (11)
1. a mixed energy storage system, it is characterised in that include first kind bidirectional power converter, first
Class energy storage device, Equations of The Second Kind bidirectional power converter and Equations of The Second Kind energy storage device；
Described first kind bidirectional power converter, for obtaining the parameter value of the physical parameter on bus, and
When described parameter value changes, change first kind accumulator according to the rate of change of default charge/discharge rates
Part carries out charge/discharge rates during discharge and recharge；Until the parameter value of described physical parameter equal to the first parameter value or
When person is equal to the second parameter value, charge/discharge rates when first kind energy storage device is carried out discharge and recharge no longer changes
Become；
Described Equations of The Second Kind bidirectional power converter, for obtaining the parameter value of described physical parameter, and described
When parameter value arrives the boundary value of preset range, Equations of The Second Kind energy storage device is carried out discharge and recharge so that described ginseng
Numerical value maintains the boundary value of preset range, described first parameter value and described second parameter value and is respectively positioned on described
In preset range.
2. the system as claimed in claim 1, it is characterised in that described first kind bidirectional power converter
Specifically for:
The parameter value of the physical parameter on acquisition bus；
When first kind energy storage device more than the first parameter value and is charged by the parameter value of described physical parameter,
The charging rate to the charging of first kind energy storage device is increased according to the rate of change of default charging rate, until institute
When stating the parameter value of physical parameter equal to the first parameter value, charging when first kind energy storage device is charged
Speed no longer changes.
3. the system as claimed in claim 1, it is characterised in that described first kind bidirectional power converter
Specifically for:
The parameter value of the physical parameter on acquisition bus；
When first kind energy storage device less than the first parameter value and is charged by the parameter value of described physical parameter,
The charging rate to the charging of first kind energy storage device is reduced according to the rate of change of default charging rate, until institute
When stating the parameter value of physical parameter equal to the first parameter value, charging when first kind energy storage device is charged
Speed no longer changes.
4. system as claimed in claim 3, it is characterised in that described first kind bidirectional power converter
It is additionally operable to:
If the charging rate of first kind energy storage device charging is reduced to zero, the parameter value of described physical parameter is also
Less than described first parameter value, then increase first kind energy storage device according to the rate of change of the default velocity of discharge
The velocity of discharge of electric discharge, until the parameter value of described physical parameter is equal to described second parameter value.
5. the system as claimed in claim 1, it is characterised in that described first kind bidirectional power converter
Specifically for:
The parameter value of the physical parameter on acquisition bus；
Parameter value in described physical parameter is less than described second parameter value and discharges first kind energy storage device
Time, increase the velocity of discharge to the electric discharge of first kind energy storage device according to the rate of change of the default velocity of discharge, directly
When parameter value to described physical parameter is equal to described second parameter value, first kind energy storage device is discharged
Time the velocity of discharge no longer change.
6. the system as claimed in claim 1, it is characterised in that described first kind bidirectional power converter
Specifically for:
The parameter value of the physical parameter on acquisition bus；
When first kind energy storage device more than the second parameter value and is discharged by the parameter value of described physical parameter,
The velocity of discharge to the electric discharge of first kind energy storage device is reduced according to the rate of change of the default velocity of discharge, until institute
When stating the parameter value of physical parameter equal to described second parameter value, when first kind energy storage device is discharged
The velocity of discharge no longer changes.
7. system as claimed in claim 6, it is characterised in that described first kind bidirectional power converter
It is additionally operable to:
If the velocity of discharge of first kind energy storage device electric discharge is reduced to zero, the parameter value of described physical parameter is also
More than described second parameter value, then increase first kind energy storage device according to the rate of change of default charging rate
The charging rate of charging, until the parameter value of described physical parameter is equal to described first parameter value.
8. the system as claimed in claim 1, it is characterised in that described Equations of The Second Kind bidirectional power converter
Specifically for:
Obtain the parameter value of described physical parameter；
When described parameter value arrives the maximum of preset range, Equations of The Second Kind energy storage device is charged, makes
Obtain described parameter value and maintain the maximum of preset range；
When described parameter value arrives the minima of preset range, Equations of The Second Kind energy storage device is discharged, makes
Obtain described parameter value and maintain the minima of preset range.
9. the system as claimed in claim 1, it is characterised in that described bus is dc bus, described
Physical parameter on bus is the voltage on described bus.
10. the system as claimed in claim 1, it is characterised in that described bus is ac bus, described
Physical parameter on bus is the virtual value of the voltage on described bus, or is the voltage on described bus
Peak value, or be the frequency of voltage on described bus.
11. 1 kinds of micro-grid systems, it is characterised in that include mixing as described in any one of claim 1-10
Close energy-storage system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510178136.6A CN106159981B (en) | 2015-04-15 | 2015-04-15 | A kind of mixed energy storage system and micro-grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510178136.6A CN106159981B (en) | 2015-04-15 | 2015-04-15 | A kind of mixed energy storage system and micro-grid system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106159981A true CN106159981A (en) | 2016-11-23 |
| CN106159981B CN106159981B (en) | 2018-12-25 |
Family
ID=58057421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510178136.6A Active CN106159981B (en) | 2015-04-15 | 2015-04-15 | A kind of mixed energy storage system and micro-grid system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106159981B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787088A (en) * | 2017-01-18 | 2017-05-31 | 西北工业大学 | It is applied to the self powered supply management circuit of discontinuous piezoelectric energy acquisition system |
| CN113437753A (en) * | 2021-08-25 | 2021-09-24 | 广州乐盈信息科技股份有限公司 | Energy storage system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377192A (en) * | 2011-10-31 | 2012-03-14 | 清华大学 | Direct-driving wave power-generating and energy-storing device and control method |
| CN202817783U (en) * | 2012-09-27 | 2013-03-20 | 广东易事特电源股份有限公司 | Super capacitor and storage battery combined energy storage energy management circuit for photovoltaic grid-connected power generation |
| CN103701144A (en) * | 2013-12-11 | 2014-04-02 | 清华大学 | Power distribution method for hybrid energy storage system |
-
2015
- 2015-04-15 CN CN201510178136.6A patent/CN106159981B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377192A (en) * | 2011-10-31 | 2012-03-14 | 清华大学 | Direct-driving wave power-generating and energy-storing device and control method |
| CN202817783U (en) * | 2012-09-27 | 2013-03-20 | 广东易事特电源股份有限公司 | Super capacitor and storage battery combined energy storage energy management circuit for photovoltaic grid-connected power generation |
| CN103701144A (en) * | 2013-12-11 | 2014-04-02 | 清华大学 | Power distribution method for hybrid energy storage system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787088A (en) * | 2017-01-18 | 2017-05-31 | 西北工业大学 | It is applied to the self powered supply management circuit of discontinuous piezoelectric energy acquisition system |
| CN106787088B (en) * | 2017-01-18 | 2019-04-19 | 西北工业大学 | Self powered supply applied to discontinuous piezoelectric energy acquisition system manages circuit |
| CN113437753A (en) * | 2021-08-25 | 2021-09-24 | 广州乐盈信息科技股份有限公司 | Energy storage system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106159981B (en) | 2018-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103904735B (en) | A kind of energy storage subsystem for batch (-type) renewable energy system and control method thereof | |
| CN104993602B (en) | Modularized energy storage system | |
| CN105098807B (en) | Complementary optimal control method in energy-storage system between multiple hybrid accumulators | |
| CN102104257B (en) | Energy storage system of apartment building, integrated power management system, and method of controlling the system | |
| CN103050987B (en) | A kind of energy-storage system of accumulator based on cell batteries group and control method | |
| CN104362693B (en) | Method and device for mutual charging and discharging between battery packs | |
| Jing et al. | Cost analysis of battery-supercapacitor hybrid energy storage system for standalone PV systems | |
| CN204681125U (en) | A kind of charging system for electric automobile based on solar energy | |
| CN104300567A (en) | Hybrid energy storage control method for stabilizing intermittent power supply power fluctuation | |
| CN103683315A (en) | Method and system for controlling hybrid energy storage type photovoltaic power generation | |
| CN102611161B (en) | Small-size wind and light complementation water suction and energy storage grid-connected electricity generating system as well as charging and discharging control method | |
| CN101685986A (en) | Wind and light complementary power generation system using super capacitor | |
| CN105552944A (en) | Network system comprising energy storage and energy router and energy adjustment method | |
| Guo et al. | A new battery energy storage system control method based on SOC and variable filter time constant | |
| CN204835716U (en) | Modular energy storage system | |
| Azmi et al. | Photovoltaic based active generator: Energy control system using stateflow analysis | |
| CN220754363U (en) | Energy storage system | |
| CN113381496A (en) | Hybrid energy storage system limit value management control method | |
| CN106159981A (en) | A kind of mixed energy storage system and micro-grid system | |
| CN202602378U (en) | Photovoltaic energy storage power station | |
| CN103607002A (en) | Cell equalization charging method | |
| CN116231875A (en) | Energy storage system and control method thereof | |
| CN101964431A (en) | Charging and discharging method of lithium secondary battery | |
| Hamidi et al. | Batteries and ultracapacitors for electric power systems with renewable energy sources | |
| CN203522276U (en) | Charging and discharging control circuit for lithium battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park building B2 Applicant after: Vitamin Technology Co., Ltd. Address before: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park building B2 Applicant before: Aimosheng Network Energy Source Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |