CN103888029B - A kind of method of micro-capacitance sensor composite energy storage system start-up motor - Google Patents
A kind of method of micro-capacitance sensor composite energy storage system start-up motor Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 32
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- 238000011217 control strategy Methods 0.000 claims abstract description 4
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- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
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Abstract
A kind of method that the present invention relates to micro-capacitance sensor composite energy storage system start-up motor, the control strategy of employing: the method controlling to use outer shroud Control of Voltage, interior circular current to control of described accumulator；The method controlling to use electric current to control of described ultracapacitor；The invention has the beneficial effects as follows: (1) realizes the normal startup of heavy-duty motor with the energy storage device of low capacity, it is possible to reduces the equipment investment of accumulator, improves the economy of system；(2) extend the service life of energy storage device, give full play to the characteristic of different energy storage device, it is to avoid overcharge, cross and put phenomenon；(3) safe and stable startup high power load motor can be realized, more have realistic meaning to producing, living.
Description
Technical field
The invention belongs to micro-capacitance sensor and technical field of new energy power generation, relate to a kind of micro-capacitance sensor composite energy storage system start-up electricity
The method of machine.
Background technology
Motor load be social production life in most common be also the load type finally wanted, under micro-grid system, it is achieved
Development and application that the safety and stability of motor starts as micro-capacitance sensor technology are laid a good foundation.The startup of motor needs electric power system to carry
Could normally start operating for instantaneous big electric current, the size of this electric current be generally motor properly functioning time size of current 5～7
Times, it is to use Large Copacity energy-storage battery to start motor load that the most commonly used energy storage device starts motor technology, although protect
Demonstrate,prove the normal startup of motor, but Large Copacity energy storage device not only floor space is big, and cost of investment is high, economy and reality
Poor by property, be unfavorable for micro-capacitance sensor play that it is energy-conservation, economical, advantage flexibly.
Summary of the invention
The technical problem to be solved be to provide a kind of can the compound storage of safety and stability, low capacity micro-capacitance sensor
The method of energy system start-up motor.
Adopted the technical scheme that a kind of based on micro-capacitance sensor composite energy storage system start-up electricity by solving above-mentioned technical problem
The method of machine, described micro-capacitance sensor includes controlling device, data acquisition unit, accumulator, ultracapacitor, the first to the second inversion
Device, the first to the second inlet wire inductance L1-L2, feeder line A-C, motor, switch K1 and ac bus；Described accumulator is successively through described
First inverter, the first inlet wire inductance L1, feeder line A connect described ac bus；Described ultracapacitor is successively through described second inverse
Become device, the second inlet wire inductance L2, feeder line B connect described ac bus；Described motor connects described successively through described switch K1, feeder line C
Ac bus；The data signal input of described data acquisition unit meets described feeder line A, feeder line B and feeder line C respectively；Described number
The input of described control device is connect according to the data signal output of harvester；The control signal outfan of described control device
Connect the corresponding control signal input of described the first to the second inverter respectively；
Control strategy based on micro-capacitance sensor composite energy storage system is: the control of described accumulator use outer shroud Control of Voltage,
Internal ring current control method；The method controlling to use electric current to control of described ultracapacitor；
Concrete grammar is as follows: set SOCBLFor the electric motor starting state-of-charge marginal value of accumulator, it is to make motor normally start
The minima of storage battery charge state, SOCBL= EBL∕EB；EBThe gross energy that can store for accumulator；EBLFor ensureing motor
The normal accumulator least energy started；SOCELFor the electric motor starting state-of-charge marginal value of ultracapacitor, represent and make motor
The minima of the normal ultracapacitor state-of-charge started, SOCEL= EEL∕EE；EEThe total energy that can store for ultracapacitor
Amount；EELFor ensureing the ultracapacitor least energy that motor normally starts；PLFor motor load；PBFor battery power；IEMAX
For ultracapacitor maximum output current；iBFor battery current；SOCBFor storage battery charge state value；SOCBMINFor accumulator
State-of-charge minima, SOCBMINIt is set to 0.2；SOCBMAXFor storage battery charge state maximum, SOCBMAXIt is set to 0.8；
SOCEFor ultracapacitor state-of-charge；iEElectric current is exported for ultracapacitor；iCFor flowing into the electric current of motor；
(1) at the initial period of electric motor starting, P is worked asL>PBTime, the power that i.e. motor needs is more than the output work of accumulator
Rate；
If (1-1) iB>=0, i.e. battery discharging, then detect the state-of-charge of accumulator；
Work as SOCBL ≤ SOCB< SOCBMAX, and SOCE ≥ SOCELTime, the most described control device controls battery tension,
Making battery tension for maintaining stablizing of micro-capacitance sensor busbar voltage, described control device controls ultracapacitor to be provided to motor
Big electric current, even ultracapacitor is with maximum output current IEMAXSmall electromotor starting current, i.e. ie_ref=IEMAX, wherein ie_ref
Given electric current for super capacitor electrode flow control；Now accumulator compensates remaining motor load electric current；
Work as SOCB > SOCBL, and SOCE< SOCELTime, then first not starting motor, first accumulator charges to super capacitor,
Even ie_ref=-IEMAXWherein ie_refGiven electric current for super capacitor electrode flow control；
If (1-2) iB< 0, i.e. accumulator charging, then detect the state-of-charge of accumulator；
Work as SOCB ≥ SOCBMAX, and SOCE ≥ SOCELTime, then make ultracapacitor with maximum output current IEMAXCompensate
Electric motor starting electric current, i.e. ie_ref=IEMAX, wherein ie_refGiven electric current for super capacitor electrode flow control；Now accumulator is mended
Repay remaining motor load electric current;
Work as SOCB ≥ SOCBMAX, and SOCE < SOCELTime, then first not starting motor, first accumulator fills to super capacitor
Electricity, even ie_ref=-IEMAX;
(2) in the stabilization sub stage of electric motor starting, from battery current iBEqual to Rated motor electric current iCeMoment, until
Current of electric iCIt is decreased to its rated current iCeTill；
Initial period i at electric motor startingC= IEMAX+iB, as battery current iBEqual to Rated motor electric current iCeTime, enter
Enter the stabilization sub stage；Control device and control ultracapacitor output electric current ie_ref= iC-iCe, make accumulator provide to motor and stablize not
The electric current become, i.e. iB=iCe, now ultracapacitor electric current iE=ie_ref, iEAlong with current of electric iCChange and change, until electric
Dynamo-electric stream is equal to rated current iC=iCe, now iE=ie_ref=0, only accumulator provides electric current to motor, i.e. iB=iC=iCe, electricity
Machine clean boot is complete.
The method that the outer shroud Control of Voltage that the control of described accumulator is used, interior circular current control is as follows:
(1) ac voltage U at feeder line A is gathered by the voltage transformer of data acquisition unitb, by described alternating current
Pressure value UbInput the control outer shroud voltage-controlled input R1 of described accumulator；
(2) by described ac voltage UbCarry out Park conversion, obtain direct-axis component voltage UbdWith quadrature axis component voltage
Ubq；
(3) by described direct-axis component voltage UbdBusbar voltage U is given with d-axisbd_refDo subtraction, i.e. carry out difference
Relatively, algebraic operation difference △ U is obtainedbd；By described quadrature axis component voltage UbqBusbar voltage U is given with quadrature axisbq_refDo subtraction
Computing, i.e. carries out difference comparsion, obtains algebraic operation difference △ Ubq；
(4) by described difference △ UbdWith difference △ UbqAfter input proportional integral link PI, then by Park inverse transformation,
The given electric current i controlled to the interior circular current of accumulatorb_ref；
(5) the given electric current i that the interior circular current of described accumulator is controlledb_refThe input that in input, circular current controls
R2, the outfan output AC electric current i that the interior circular current of described accumulator controlsb；
(6) described alternating current ibVoltage U is obtained through inlet wire inductance 1/L1Sb, feed back to the outer shroud electricity of described accumulator
The input R1 of voltage-controlled system；
(7) the interior circular current of described accumulator controls is by described electric current ibWith described given electric current ib_refDo subtraction fortune
Calculate, obtain △ Ib, described △ IbAfter filtering after link, amplitude limit link, input PWM generator, the output of described PWM generator
Signal inputs the first inverter as the triggering signal of the first inverter, and described first inverter is according to triggering Signal Regulation exchange
The size of electric current, thus complete the control of interior circular current.
The method that the electric current that the control of described ultracapacitor is used controls is as follows:
Described super capacitor electrode flow control is
Alternating current is Ie, by described alternating current IeGiven electric current i with super capacitor electrode flow controle_refDo subtraction to obtain
Difference △ Ie, △ IeBeing input to PWM generator after link, amplitude limit link after filtering, the output signal of described PWM generator is made
Being that the triggering signal of the second inverter inputs the second inverter, described second inverter is according to triggering Signal Regulation alternating current
Size, thus the control electric current completing ultracapacitor controls.
The invention has the beneficial effects as follows: (1) realizes the normal startup of heavy-duty motor with the energy storage device of low capacity, it is possible to
Reduce the equipment investment of accumulator, improve the economy of system；(2) extend the service life of energy storage device, give full play to difference
The characteristic of energy storage device, it is to avoid overcharge, cross and put phenomenon；(3) safe and stable startup high power load can be realized electronic
Machine, more has realistic meaning to producing, living.
Accompanying drawing explanation
Fig. 1 is micro-capacitance sensor structural representation.
Fig. 2 is the accumulator outer shroud Control of Voltage schematic diagram of the present invention.
Fig. 3 be the present invention accumulator in circular current control principle drawing.
Fig. 4 is the super capacitor electrode flow control schematic diagram of the present invention.
Detailed description of the invention
It is described further below in conjunction with Fig. 1-4 and the present embodiment.
Multiple elements design energy-storage system uses power-type energy storage device ultracapacitor and energy type energy storage device accumulator to make
For energy storage device, super capacitor has that power density is big, service life cycle length, the charging interval is short, reliability is high, energy density
Low feature, and accumulator has energy density greatly, with Large Copacity energy storage, but can be not suitable for the feature of frequent discharge and recharge, logical
Cross selection both energy storage devices, take the control method of the present invention to start motor, two kinds of energy storage devices can be made full use of each
From advantage, it is ensured that motor safety normally starts and stable operation.
The present invention uses lithium iron phosphate storage battery and ultracapacitor as energy storage device, is connected by the first inverter respectively
Being connected to ac bus, ac bus is connected to load motor, data acquisition unit is voltage, electricity in real-time acquisition system
Stream, state-of-charge, each on off state, control device and be used for processing the system signal collected and sending control signal, complete
Regulation to energy storage device, it is achieved the safety and stability of motor starts.
Described micro-capacitance sensor includes controlling device, data acquisition unit, accumulator, ultracapacitor, the first to the second inversion
Device, the first to the second inlet wire inductance L1-L2, feeder line A-C, motor, switch K1 and ac bus；Described accumulator is successively through described
First inverter, the first inlet wire inductance L1, feeder line A connect described ac bus；Described ultracapacitor is successively through described second inverse
Become device, the second inlet wire inductance L2, feeder line B connect described ac bus；Described motor connects described successively through described switch K1, feeder line C
Ac bus；The data signal input of described data acquisition unit meets described feeder line A, feeder line B and feeder line C respectively；Described number
The input of described control device is connect according to the data signal output of harvester；The control signal outfan of described control device
Connect the corresponding control signal input of described the first to the second inverter respectively；
It is characterized in that the control under described energy-storage system off-network pattern uses Double-loop Control Strategy；The control of described accumulator
System uses the method that outer shroud Control of Voltage, interior circular current control；The method controlling to use electric current to control of described ultracapacitor；
The method of described startup motor is as follows: set SOCBLFor the electric motor starting state-of-charge marginal value of accumulator, it is to make electricity
The minima of the storage battery charge state that machine normally starts, SOCBL= EBL∕EB；EBThe gross energy that can store for accumulator；EBL
For ensureing the accumulator least energy that motor normally starts；SOCELFor the electric motor starting state-of-charge marginal value of ultracapacitor,
Represent the minima of the ultracapacitor state-of-charge making motor normally start, SOCEL= EEL∕EE；EECan for ultracapacitor
The gross energy stored；EELFor ensureing the ultracapacitor least energy that motor normally starts；PLFor motor load；PBFor electric power storage
Pond power；IEMAXFor ultracapacitor maximum output current；iBFor battery current；SOCBFor storage battery charge state value；
SOCBMINFor storage battery charge state minima, SOCBMINIt is set to 0.2；SOCBMAXFor storage battery charge state maximum,
SOCBMAXIt is set to 0.8；SOCEFor ultracapacitor state-of-charge；iEElectric current is exported for ultracapacitor；iCFor flowing into motor
Electric current；
(1) at the initial period of electric motor starting, P is worked asL>PBTime, the power that i.e. motor needs is more than the output work of accumulator
Rate；
If (1-1) iB>=0, i.e. battery discharging, then detect the state-of-charge of accumulator；
Work as SOCBL ≤ SOCB< SOCBMAX, and SOCE ≥ SOCELTime, the most described control device controls therefore storage battery
Pressure, makes battery tension for maintaining stablizing of micro-capacitance sensor busbar voltage, and described control device controls ultracapacitor to motor
There is provided big electric current, even ultracapacitor is with maximum output current IEMAXSmall electromotor starting current, i.e. ie_ref=IEMAX, wherein
ie_refGiven electric current for super capacitor electrode flow control；Now accumulator compensates remaining motor load electric current；
Work as SOCB > SOCBL, and SOCE< SOCELTime, then first not starting motor, first accumulator charges to super capacitor,
Even ie_ref=-IEMAXWherein ie_refGiven electric current for super capacitor electrode flow control；
If (1-2) iB< 0, i.e. battery discharging, then detect the state-of-charge of accumulator；
Work as SOCB ≥ SOCBMAX, and SOCE ≥ SOCELTime, then make ultracapacitor mend with maximum output current IEMAX
Repay electric motor starting electric current, i.e. ie_ref=IEMAX, wherein ie_refGiven electric current for super capacitor electrode flow control；Now accumulator
Compensate remaining motor load electric current;
Work as SOCB ≥ SOCBMAX, and SOCE < SOCELTime, then first not starting motor, first accumulator fills to super capacitor
Electricity, even ie_ref=-IEMAX;
(2) in the stabilization sub stage of electric motor starting, from battery current iBEqual to Rated motor electric current iCeMoment, until
Current of electric iCIt is decreased to its rated current iCeTill；
Initial period i at electric motor startingC= IEMAX+iB, as battery current iBEqual to Rated motor electric current iCeTime, enter
Enter the stabilization sub stage；Control device and control ultracapacitor output electric current ie_ref= iC-iCe, make accumulator provide to motor and stablize not
The electric current become, i.e. iB=iCe, now ultracapacitor electric current iE=ie_ref, iEAlong with current of electric iCChange and change, until electric
Dynamo-electric stream is equal to rated current iC=iCe, now iE=ie_ref=0, only accumulator provides electric current to motor, i.e. iB=iC=iCe, electricity
Machine clean boot is complete.
The method that the outer shroud Control of Voltage that the control of described accumulator is used, interior circular current control is as follows:
(1) ac voltage U at feeder line A is gathered by the voltage transformer of data acquisition unitb, by described alternating current
Pressure value UbInput the control outer shroud voltage-controlled input R1 of described accumulator；
(2) by described ac voltage UbCarry out Park conversion, obtain direct-axis component voltage UbdWith quadrature axis component voltage
Ubq；
(3) by described direct-axis component voltage UbdBusbar voltage U is given with d-axisbd_refDo subtraction, i.e. carry out difference
Relatively, algebraic operation difference △ U is obtainedbd；By described quadrature axis component voltage UbqBusbar voltage U is given with quadrature axisbq_refDo subtraction
Computing, i.e. carries out difference comparsion, obtains algebraic operation difference △ Ubq；
(4) by described difference △ UbdWith difference △ UbqAfter input proportional integral link PI, then by Parker inverse transformation,
The given electric current i controlled to the interior circular current of accumulatorb_ref；
(5) the given electric current i that the interior circular current of described accumulator is controlledb_refThe input that in input, circular current controls
R2, the outfan output AC electric current i that the interior circular current of described accumulator controlsb；
(6) described alternating current ibVoltage U is obtained through inlet wire inductance 1/L1Sb, feed back to the outer shroud electricity of described accumulator
The input R1 of voltage-controlled system；
(7) the interior circular current of described accumulator controls is by described electric current ibWith described given electric current ib_refDo subtraction fortune
Calculate, obtain △ Ib, described △ IbAfter filtering after link, amplitude limit link, input PWM generator, the output of described PWM generator
Signal inputs the first inverter as the triggering signal of the first inverter, and described first inverter is according to triggering Signal Regulation exchange
The size of electric current, thus complete interior circular current and control.
The method that the electric current that the control of described ultracapacitor is used controls is as follows:
Described super capacitor electrode flow control is
Alternating current is Ie, by described alternating current IeGiven electric current i with super capacitor electrode flow controle_refDo subtraction to obtain
Difference △ Ie, △ IeBeing input to PWM generator after link, amplitude limit link after filtering, the output signal of described PWM generator is made
Being that the triggering signal of the second inverter inputs the second inverter, described second inverter is according to triggering Signal Regulation alternating current
Size, thus the electric current completing ultracapacitor controls.
The energy storage device of present invention low capacity realizes the normal startup of heavy-duty motor, it is possible to reduce the equipment of accumulator
Investment, improves the economy of system；The present invention can extend the service life of energy storage device, give full play to the spy of different energy storage device
Property, it is to avoid overcharge, cross and put phenomenon；The present invention can realize safe and stable startup high power load motor, to produce,
Life more has realistic meaning.
Claims (3)
1. a method based on micro-capacitance sensor composite energy storage system start-up motor, described micro-capacitance sensor includes controlling device, data acquisition
Acquisition means, accumulator, ultracapacitor, the first to the second inverter, the first to the second inlet wire inductance L1-L2, feeder line A-C, electricity
Machine, switch K1 and ac bus；Described accumulator connects described through described first inverter, the first inlet wire inductance L1, feeder line A successively
Ac bus；Described ultracapacitor meets described exchange mother through described second inverter, the second inlet wire inductance L2, feeder line B successively
Line；Described motor connects described ac bus through described switch K1, feeder line C successively；The data signal of described data acquisition unit is defeated
Enter end and meet described feeder line A, feeder line B and feeder line C respectively；The data signal output of described data acquisition unit connects described control and fills
The input put；What the control signal outfan of described control device connect described the first to the second inverter respectively controls letter accordingly
Number input；
It is characterized in that control strategy based on micro-capacitance sensor composite energy storage system is: the control of described accumulator uses outer loop voltag
Control, internal ring current control method；The method controlling to use electric current to control of described ultracapacitor；
Concrete grammar is as follows: set SOCBLFor the electric motor starting state-of-charge marginal value of accumulator, it it is the storage making motor normally start
The minima of battery charge state, SOCBL= EBL∕EB；EBThe gross energy that can store for accumulator；EBLFor ensureing that motor is normal
The accumulator least energy started；SOCELFor the electric motor starting state-of-charge marginal value of ultracapacitor, represent and make motor normal
The minima of the ultracapacitor state-of-charge started, SOCEL= EEL∕EE；EEThe gross energy that can store for ultracapacitor；
EELFor ensureing the ultracapacitor least energy that motor normally starts；PLFor motor load；PBFor battery power；IEMAXIt is super
Level capacitor maximum output current；iBFor battery current；SOCBFor storage battery charge state value；SOCBMINCharged for accumulator
State minima, SOCBMINIt is set to 0.2；SOCBMAXFor storage battery charge state maximum, SOCBMAXIt is set to 0.8；SOCEFor
Ultracapacitor state-of-charge；iEElectric current is exported for ultracapacitor；iCFor flowing into the electric current of motor；
(1) at the initial period of electric motor starting, P is worked asL>PBTime, the power that i.e. motor needs is more than the output of accumulator；
If (1-1) iB>=0, i.e. battery discharging, then detect the state-of-charge of accumulator；
Work as SOCBL ≤ SOCB< SOCBMAX, and SOCE ≥ SOCELTime, the most described control device controls battery tension, makes storage
Cell voltage is for maintaining stablizing of micro-capacitance sensor busbar voltage, and described control device controls ultracapacitor provides big electricity to motor
Stream, even ultracapacitor is with maximum output current IEMAXSmall electromotor starting current, i.e. ie_ref=IEMAX, wherein ie_refIt is super
The given electric current that level condenser current controls；Now accumulator compensates remaining motor load electric current；
Work as SOCB > SOCBL, and SOCE< SOCELTime, then first not starting motor, first accumulator charges to super capacitor, even
ie_ref=-IEMAXWherein ie_refGiven electric current for super capacitor electrode flow control；
If (1-2) iB< 0, i.e. accumulator charging, then detect the state-of-charge of accumulator；
Work as SOCB ≥ SOCBMAX, and SOCE ≥ SOCELTime, then make ultracapacitor with maximum output current IEMAXSmall electromotor
Starting current, i.e. ie_ref=IEMAX, wherein ie_refGiven electric current for super capacitor electrode flow control；Now accumulator compensates surplus
Remaining motor load electric current;
Work as SOCB ≥ SOCBMAX, and SOCE < SOCELTime, then first not starting motor, first accumulator charges to super capacitor,
Even ie_ref=-IEMAX;
(2) in the stabilization sub stage of electric motor starting, from battery current iBEqual to Rated motor electric current iCeMoment, until motor
Electric current iCIt is decreased to its rated current iCeTill；
Initial period i at electric motor startingC= IEMAX+iB, as battery current iBEqual to Rated motor electric current iCeTime, enter steady
Determine the stage；Control device and control ultracapacitor output electric current ie_ref= iC-iCe, make accumulator stablize constant to motor offer
Electric current, i.e. iB=iCe, now ultracapacitor electric current iE=ie_ref, iEAlong with current of electric iCChange and change, until motor is electric
Stream is equal to rated current iC=iCe, now iE=ie_ref=0, only accumulator provides electric current to motor, i.e. iB=iC=iCe, motor is pacified
Full startup is complete.
A kind of method based on micro-capacitance sensor composite energy storage system start-up motor the most according to claim 1, it is characterised in that
The method that the outer shroud Control of Voltage that the control of described accumulator is used, interior circular current control is as follows:
(1) ac voltage U at feeder line A is gathered by the voltage transformer of data acquisition unitb, by described ac voltage Ub
Input the control outer shroud voltage-controlled input R1 of described accumulator；
(2) by described ac voltage UbCarry out Park conversion, obtain direct-axis component voltage UbdWith quadrature axis component voltage Ubq；
(3) by described direct-axis component voltage UbdBusbar voltage U is given with d-axisbd_refDo subtraction, i.e. carry out difference comparsion,
Obtain algebraic operation difference △ Ubd；By described quadrature axis component voltage UbqBusbar voltage U is given with quadrature axisbq_refDo subtraction,
I.e. carry out difference comparsion, obtain algebraic operation difference △ Ubq；
(4) by described difference △ UbdWith difference △ UbqAfter input proportional integral link PI, then by Park inverse transformation, stored
The given electric current i that the interior circular current of battery controlsb_ref；
(5) the given electric current i that the interior circular current of described accumulator is controlledb_refThe input R2 that in input, circular current controls, institute
State the outfan output AC electric current i that the interior circular current of accumulator controlsb；
(6) described alternating current ibVoltage U is obtained through inlet wire inductance 1/L1Sb, feed back to the outer loop voltag control of described accumulator
The input R1 of system；
(7) the interior circular current of described accumulator controls is by described electric current ibWith described given electric current ib_refDo subtraction,
To △ Ib, described △ IbAfter filtering after link, amplitude limit link, inputting PWM generator, the output signal of described PWM generator is made
Being that the triggering signal of the first inverter inputs the first inverter, described first inverter is according to triggering Signal Regulation alternating current
Size, thus complete the control of interior circular current.
A kind of method based on micro-capacitance sensor composite energy storage system start-up motor the most according to claim 1, it is characterised in that
The method that the electric current that the control of described ultracapacitor is used controls is as follows:
Described super capacitor electrode flow control be by the average anode current of ultracapacitor through the second inverter inversion for exchange
Electric current is Ie, by described alternating current IeGiven electric current i with super capacitor electrode flow controle_refDo subtraction and obtain difference
△Ie, △ IeBeing input to PWM generator after link, amplitude limit link after filtering, the output signal of described PWM generator is as
The triggering signal of two inverters inputs the second inverter, and described second inverter is according to triggering the big of Signal Regulation alternating current
Little, thus the control electric current completing ultracapacitor controls.
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