CN106208113A - A kind of hybrid energy-storing hierarchical coordinative control method based on state-of-charge - Google Patents

A kind of hybrid energy-storing hierarchical coordinative control method based on state-of-charge Download PDF

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CN106208113A
CN106208113A CN201610547090.5A CN201610547090A CN106208113A CN 106208113 A CN106208113 A CN 106208113A CN 201610547090 A CN201610547090 A CN 201610547090A CN 106208113 A CN106208113 A CN 106208113A
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charge
hybrid energy
power
bus
state
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CN106208113B (en
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李辉
黄瑶妹
彭道刚
夏飞
马飞
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上海电力学院
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices

Abstract

The present invention relates to a kind of hybrid energy-storing hierarchical coordinative control method based on state-of-charge, control for the micro-capacitance sensor containing mixing energy-storage units, hybrid energy-storing unit includes accumulator and super capacitor, accumulator and super capacitor are connected to dc bus by DC/DC changer respectively, dc bus is connected to micro-capacitance sensor ac bus by DC/AC changer, the method comprises the steps: to obtain micro-capacitance sensor ac bus voltage, ac bus frequency and hybrid energy-storing unit comprehensive state-of-charge carry out upper strata power optimization and control to obtain the output instruction of DC/AC changer, and then control the work of DC/AC changer;Obtain DC bus-bar voltage, carry out lower floor's power distribution with stable DC busbar voltage for target, respectively obtain the charge-discharge electric power instruction of accumulator and super capacitor, and then control the work of corresponding DC/DC changer.Compared with prior art, the present invention can effectively prevent overcharging or excessively putting of hybrid energy-storing battery.

Description

A kind of hybrid energy-storing hierarchical coordinative control method based on state-of-charge
Technical field
The present invention relates to a kind of hybrid energy-storing control method, especially relate to a kind of hybrid energy-storing based on state-of-charge and divide Layer control method for coordinating.
Background technology
In recent years, along with the fast development of regenerative resource, micro-capacitance sensor reliability, stability are proposed higher by people Requirement.In order to improve the problems such as power-balance, stability and the quality of power supply in micro-grid system, it is equipped with output the most steady Fixed energy storage device is one of effective means of suppression power pulsations, and energy-storage system has at short notice quickly absorption and release The feature of energy, therefore can, the shortcoming of undulatory property intermittent efficiently against regenerative resource output.In order to make up biography Uniting the deficiency of single energy storage device, the hybrid energy-storing unit using power type super capacitor and energy type accumulator is storage at present Can one of developing direction of technology, ultracapacitor has that fast response time, high-power fan-out capability be strong, energy conversion efficiency The feature such as high, to have extended cycle life, is typical power-type energy storage device.Ultracapacitor and accumulator coordinated operation can be significantly Degree improves the peak power I/O capability of energy storage device, reduces internal loss, reduces the discharge and recharge number of times of accumulator, thus The service life of raising equipment.Therefore hybrid energy-storing is applied to renewable power supply system, there is bigger technology economy advantage.
The most a lot of researchers control the existing important achievement of technical elements at hybrid energy-storing.ASAO T proposes to use low pass The method of filtering compensates the special frequency channel component in wind power, but owing to not considering the state-of-charge (SOC) of energy storage device, holds Easily cause equipment super-charge super-discharge.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide a kind of based on state-of-charge Hybrid energy-storing hierarchical coordinative control method.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of hybrid energy-storing hierarchical coordinative control method based on state-of-charge, for the micro-capacitance sensor containing mixing energy-storage units Control, described hybrid energy-storing unit includes that accumulator and super capacitor, described accumulator and super capacitor pass through respectively DC/DC changer is connected to dc bus, and dc bus is connected to micro-capacitance sensor ac bus, the method by DC/AC changer Comprise the steps:
(1) micro-capacitance sensor ac bus voltage U, ac bus frequency f and hybrid energy-storing unit comprehensive state-of-charge are obtained SOCHESS, according to U, f and SOCHESSCarry out upper strata power optimization and control to obtain the output instruction of DC/AC changer, and then control DC/AC changer processed works;
(2) DC bus-bar voltage V is obtaineddc, carry out lower floor's power distribution with stable DC busbar voltage for target, obtain respectively Charge-discharge electric power to accumulator and super capacitor instructs, and then controls the work of corresponding DC/DC changer.
Step (1) power optimization at the middle and upper levels controls to obtain especially by fuzzy logic algorithm, specifically includes:
(101) by ac bus frequency f and ac bus rated frequency frefDeviation through PI regulation obtain active power lack Volume value Pref, simultaneously by rated voltage U of ac bus voltage U Yu ac busrefDeviation through PI regulation obtain reactive power Vacancy value Qref
(102) by hybrid energy-storing unit comprehensive state-of-charge SOCHESSWith active power vacancy value PrefAs entering through FUZZY ALGORITHMS FOR CONTROL obtains active power correction value Δ P, simultaneously by hybrid energy-storing unit comprehensive state-of-charge SOCHESSWith idle Power shortage value QrefReactive power correction value Δ Q is obtained through FUZZY ALGORITHMS FOR CONTROL as input;
(103) to active power vacancy value PrefWith the output that active power correction value Δ P summation obtains DC/AC changer Active power instruction P 'ref, to reactive power vacancy value QrefDC/AC changer is obtained with reactive power correction value Δ Q summation Output reactive power instruction Q 'ref
Described hybrid energy-storing unit comprehensive state-of-charge SOCHESSObtained by following formula:
SOC H E S S = Q V R L A B · SOC V R L A B + Q S C · SOC S C Q V R L A B + Q S C ;
Wherein, QVRLAB、QSCIt is respectively accumulator and the rated capacity of super capacitor, SOCVRLAB、QSCBe respectively accumulator and The state-of-charge of super capacitor.
Described step (2) specifically includes:
(201) by dc bus rated voltage VrefWith DC bus-bar voltage VdcDeviation through PI regulation obtain hybrid energy-storing The charge-discharge electric power P of unitHESS
(202) by the charge-discharge electric power P of hybrid energy-storing unitHESSObtain low frequency component by low pass filter filtering and make For accumulator cell charging and discharging power instruction Pbat, high fdrequency component is instructed P as super capacitor charge-discharge electric power simultaneouslysc
Obtain accumulator cell charging and discharging power instruction PbatP is instructed with super capacitor charge-discharge electric powerscAfter also need to it is carried out Revise, particularly as follows:
A () asks for serving as electricity corrected output Δ P ' according to following formula:
Δ P '=(SOCsc-SOCQVAR)×|PHESS| × β,
Wherein, SOCVRLAB、QSCIt is respectively accumulator and the state-of-charge of super capacitor, PHESSFor filling of hybrid energy-storing unit Discharge power, β is correction factor, and β span is 1.1~1.3;
(b) calculating accumulator charge-discharge electric power instruction correction value P 'bat: P 'bat=Pbat+ DP ', calculates super capacitor charge and discharge Electrical power instruction correction value P 'sc: P 'sc=Psc-ΔP′;
And then by accumulator cell charging and discharging power instruction correction value P 'batAs accumulator cell charging and discharging power instruction, by super electricity Hold charge-discharge electric power instruction correction value P 'scInstruct as super capacitor charge-discharge electric power, thus control corresponding DC/DC changer Work.
Compared with prior art, present invention have the advantage that
(1) present invention carries out take into account hybrid energy-storing unit comprehensive state-of-charge when upper strata power optimization controls SOCHESS, thus while stable ac bus voltage and frequency, ensure that overcharging or excessively putting of hybrid energy-storing unit, it is ensured that The safety of energy-storage system;
(2) high frequency power is distributed to super electricity by low pass filter filtering mode by the lower floor power distribution of the present invention Holding, low frequency power is distributed to accumulator, has greatly been played accumulator and the advantage of two kinds of energy-storage travelling wave tubes of super capacitor;
(3) present invention carries out power at the state-of-charge also by accumulator and super capacitor carrying out lower floor's power distribution Revise, when two energy-storage travelling wave tubes state-of-charge relatively time, corrected output Δ P ' value is smaller, i.e. the correction of work done rate Smaller, when the state-of-charge of two energy-storage travelling wave tubes differs bigger, the value of corrected output Δ P ' is bigger, i.e. work done Rate correction is the biggest, so that the state-of-charge of two kinds of energy-storage travelling wave tubes keeps a poised state relatively, prevents some Energy-storage travelling wave tube overcharges or crosses puts phenomenon, extends the life-span of energy-storage travelling wave tube.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the micro-capacitance sensor containing mixing energy-storage units;
Fig. 2 is the control block diagram that upper strata power optimization controls;
Fig. 3 is the control block diagram of lower floor's power distribution;
Fig. 4 is hybrid energy-storing unit comprehensive state-of-charge SOCHESSCurve comparison figure;
Fig. 5 is super capacitor state-of-charge SOCSCCurve comparison figure;
Fig. 6 is storage battery charge state SOCVRLABCurve comparison figure;
Wherein 1 is accumulator, and 2 is super capacitor, and 3 is a DC/DC changer, and 4 is the 2nd DC/DC changer, and 5 are DC/AC changer.
Detailed description of the invention
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
A kind of hybrid energy-storing hierarchical coordinative control method based on state-of-charge, for the micro-capacitance sensor containing mixing energy-storage units Control, be illustrated in figure 1 the structured flowchart of micro-capacitance sensor of weldering hybrid energy-storing unit, hybrid energy-storing unit includes accumulator 1 He Super capacitor 2, accumulator 1 and super capacitor 2 are connected to dc bus by DC/DC changer respectively, i.e. a DC/DC in figure Changer 3 and the 2nd DC/DC changer 4, dc bus is connected to micro-capacitance sensor ac bus by DC/AC changer 5, wherein stores Battery 1 uses ferric phosphate lithium cell.
Present invention hybrid energy-storing based on state-of-charge hierarchical coordinative control method comprises the steps:
(1) micro-capacitance sensor ac bus voltage U, ac bus frequency f and hybrid energy-storing unit comprehensive state-of-charge are obtained SOCHESS, according to U, f and SOCHESSCarry out upper strata power optimization and control to obtain the output instruction of DC/AC changer, and then control DC/AC changer processed works;
(2) DC bus-bar voltage V is obtaineddc, carry out lower floor's power distribution with stable DC busbar voltage for target, obtain respectively Charge-discharge electric power to accumulator and super capacitor instructs, and then controls the work of corresponding DC/DC changer.
Step (1) power optimization at the middle and upper levels controls to obtain especially by fuzzy logic algorithm, idiographic flow block diagram such as Fig. 2 institute Show:
First, by ac bus frequency f and ac bus rated frequency frefDeviation through PI regulation obtain active power lack Volume value Pref, simultaneously by rated voltage U of ac bus voltage U Yu ac busrefDeviation through PI regulation obtain reactive power Vacancy value Qref
Secondly, by hybrid energy-storing unit comprehensive state-of-charge SOCHESSWith active power vacancy value PrefAs entering through FUZZY ALGORITHMS FOR CONTROL obtains active power correction value Δ P, simultaneously by hybrid energy-storing unit comprehensive state-of-charge SOCHESSWith idle Power shortage value QrefReactive power correction value Δ Q, hybrid energy-storing unit comprehensive lotus is obtained through FUZZY ALGORITHMS FOR CONTROL as input Electricity condition SOCHESSObtained by following formula:
SOC H E S S = Q V R L A B · SOC V R L A B + Q S C · SOC S C Q V R L A B + Q S C ;
Wherein, QVRLAB、QSCIt is respectively accumulator and the rated capacity of super capacitor, SOCVRLAB、QSCBe respectively accumulator and The state-of-charge of super capacitor.
For the ease of distinguishing the running status of hybrid energy-storing unit, according to hybrid energy-storing cell S OCHESSSize, will mixing Energy-storage units is divided into 7 duties, because the Capacity Ratio ultracapacitor of ferric phosphate lithium cell in hybrid energy-storing unit Greatly, and the state-of-charge operation interval of super capacitor is 0.1~1, the state-of-charge operation interval of ferric phosphate lithium cell be 0.2~ 0.9, here choose the state-of-charge operation interval approximation state-of-charge work as hybrid energy-storing unit of ferric phosphate lithium cell Make interval, i.e. the state-of-charge operation interval of hybrid energy-storing unit is 0.2~0.9.The duty divided is as follows:
A. SOC is worked asHESSWhen running between 0.4~0.7, referred to as optimum state region, hybrid energy-storing unit is interval at this Interior existing enough electricity can carry out discharge operation, also has enough residual capacities to be charged operation, the most not Need active power vacancy value P to the output of PI controllerrefWith reactive power vacancy value QrefBeing modified, by it, directly it is made Power instruction for energy-storage system.
B. SOC is worked asHESSWhen running between 0.7~0.8 or 0.3~0.4, referred to as suboptimum state region, now mix storage Unit existence can overcharge or cross the possibility put.With SOCHESSAs a example by 0.7~0.8, now hybrid energy-storing unit existence overcharges May, if hybrid energy-storing unit is just from micro-capacitance sensor AC absorbed power, now should reduce hybrid energy-storing unit and absorb energy, I.e. abandon the compensation of part imbalance power in micro-capacitance sensor.
C. SOC is worked asHESSWhen being between 0.8~0.9 or 0.2~0.3, referred to as state of alert region, now hybrid energy-storing Unit has approached and has overcharged or cross the boundary line put.With SOCHESSAs a example by 0.8~0.9, now hybrid energy-storing unit has been forced The border closely overcharged, if continued from micro-capacitance sensor absorbed power, can cause hybrid energy-storing unit to occur overcharging, and it is right now should to abandon The compensation of micro-capacitance sensor imbalance power, and select to make suitable opportunity hybrid energy-storing unit enter discharge condition.
D. SOC is worked asHESSLess than 0.2 or higher than 0.9, now hybrid energy-storing unit is completely into alarm condition region, with SOCHESSAs a example by 0.9, if now hybrid energy-storing unit just absorbs energy from micro-capacitance sensor, should be immediately by hybrid energy-storing unit Discharge condition is converted to from charged state, until SOCHESSLess than 0.9, it is transformed into state of alert region.
Fuzzy rule is formulated in duty according to hybrid energy-storing and the corresponding operation be given, and needs to design the first mould Fuzzy controllers and the second fuzzy controller, as a example by revising active power, i.e. design the first fuzzy controller, this fuzzy controller Use the two dimension fuzzy control structure of two input-mono-outputs, be described below inputting, output variable carries out the mistake of obfuscation computing Journey.
Input E1: hybrid energy-storing cell S OCHESS, its excursion (basic domain) is [0,100%], and fuzzy domain is -3 ,-2 ,-1,0,1,2,3}, and corresponding fuzzy subset be " negative big (NB) ", " (NM) in Fu ", " bearing little (NS) ", " zero (ZO) ", " the least (PS) ", " center (PM) ", " honest (PB) " }, represent the work shape residing for current hybrid energy-storing unit respectively State: the lowest state of over-discharge state, electricity, electricity Lower state, electricity normal condition, the higher state of electricity, the highest shape of electricity State, overcharge condition.
The active power instruction P of input E2:PI controller outputref, its span is by the specified charge and discharge of hybrid energy-storing unit The restriction of power, the specified active power selecting hybrid energy-storing unit herein is 10kW, thus its span be-10kW~ 10kW, i.e. basic domain is [-10,10], and fuzzy domain is that {-3 ,-2 ,-1,0,1,2,3}, corresponding fuzzy subset is { " negative big (NB) ", " (NM) in Fu ", " negative little (NS) ", " zero (ZO) ", " the least (PS) ", " center (PM) ", " honest (PB) " }, table respectively Show that hybrid energy-storing unit command power value is positive and negative and size: charge power value is very big, charge power value is medium, charge power value very Little, do not charge do not discharge, discharge power value is the least, discharge power value is medium, discharge power value is the biggest.
Output U: active power correction value Δ P, its span is limited by the value model of PI controller active power instruction Enclose, in order to when battery SOC is too low, the charging and discharging state of conversion battery, the scope of Δ P should instruct slightly than active power Greatly, it is contemplated that PrefSpan, DP takes-12kW~12kW, and i.e. basic domain is [-12,12].Fuzzy domain be-3 ,- 2 ,-1,0,1,2,3}, corresponding fuzzy subset be " negative big (NB) ", " (NM) in Fu ", " bearing little (NS) ", " zero (ZO) ", " just Little (PS) ", " center (PM) ", " honest (PB) ", the most corresponding corrected output Δ P negative big, negative in, negative little, zero, the least, just In, honest.
According to previously described SOCHESSAnd PrefAnd the relation between correction value Δ P, it controls rule as shown in table 1.
Table 1 fuzzy control rule
Based on identical correction rule, the fuzzy control rule of reactive power is identical with table 1, and the nothing of PI controller output Merit power shortage value QrefIn the range of-5kvar~5kvar, reactive power correction value Δ Q is in the range of-6kvar~6kvar.
Finally, to active power vacancy value PrefWith the output that active power correction value Δ P summation obtains DC/AC changer Active power instruction P 'ref, to reactive power vacancy value QrefDC/AC changer is obtained with reactive power correction value Δ Q summation Output reactive power instruction Q 'ref
Being illustrated in figure 3 the control block diagram of lower floor's power distribution, step (2) comprises the steps:
(201) by dc bus rated voltage VrefWith DC bus-bar voltage VdcDeviation through PI regulation obtain hybrid energy-storing The charge-discharge electric power P of unitHESS
(202) by the charge-discharge electric power P of hybrid energy-storing unitHESSObtain low frequency component by low pass filter filtering and make For accumulator cell charging and discharging power instruction Pbat, high fdrequency component is instructed P as super capacitor charge-discharge electric power simultaneouslysc
Obtain accumulator cell charging and discharging power instruction PbatP is instructed with super capacitor charge-discharge electric powerscAfter also need to it is carried out Revise, particularly as follows:
A () asks for serving as electricity corrected output Δ P ' according to following formula:
Δ P '=(SOCsc-SOCQVAR)×|PHESS| × β,
Wherein, SOCVRLAB、QSCIt is respectively accumulator and the state-of-charge of super capacitor, PHESSFor filling of hybrid energy-storing unit Discharge power, β is correction factor, and β span is 1.1~1.3;
(b) calculating accumulator charge-discharge electric power instruction correction value P 'bat: P 'bat=Pbat+ Δ P ', calculates super capacitor charge and discharge Electrical power instruction correction value P 'sc: P 'sc=Psc-ΔP′;
And then by accumulator cell charging and discharging power instruction correction value P 'batAs accumulator cell charging and discharging power instruction, by super electricity Hold charge-discharge electric power instruction correction value P 'scInstruct as super capacitor charge-discharge electric power, thus control corresponding DC/DC changer Work.
The present embodiment uses hybrid energy-storing hierarchical coordinative control method based on state-of-charge carry out and use common The hybrid energy-storing unit discharge and recharge allocation strategy of low-pass filtering algorithm carries out contrast experiment.Fig. 4 show hybrid energy-storing unit and combines Close state-of-charge SOCHESSCurve comparison figure, in figure curve a1 be the present invention hybrid energy-storing based on state-of-charge layering association The hybrid energy-storing unit comprehensive state-of-charge SOC of control methodHESSCurve, curve a2 is the mixing of general low pass filtering algorithm Energy-storage units comprehensive state-of-charge SOCHESSCurve, as seen from the figure, hybrid energy-storing based on the state-of-charge layering of the present invention is assisted The hybrid energy-storing unit comprehensive state-of-charge SOC of control methodHESSExcursion controls, between 0.2~0.8, to maintain conjunction Within the scope of reason, effectively prevent overcharging or excessively putting of hybrid energy-storing unit.Fig. 5 is super capacitor state-of-charge SOCSCCurve Comparison diagram, super capacitor state-of-charge SOC under curve b1 is control method of the present invention in figureSCCurve, curve b2 is general control Super capacitor state-of-charge Q under methodSCCurve.Fig. 6 is storage battery charge state SOCVRLABCurve comparison figure, curve in figure C1 is storage battery charge state SOC under control method of the present inventionVRLABCurve, curve c2 is that under general control method, accumulator is charged State SOCVRLABCurve.From Fig. 5 Fig. 6, use under the control method of the present invention, ultracapacitor and the charged shape of accumulator Many that state excursion during whole is little, such as super capacitor state-of-charge QSCExcursion is 0.25~0.68, electric power storage Pond state-of-charge SOCVRLABExcursion is 0.25~0.78, does not exist to overcharge or cross and puts.

Claims (5)

1. a hybrid energy-storing hierarchical coordinative control method based on state-of-charge, for the micro-capacitance sensor containing mixing energy-storage units Controlling, described hybrid energy-storing unit includes that accumulator and super capacitor, described accumulator and super capacitor pass through DC/ respectively DC changer is connected to dc bus, and dc bus is connected to micro-capacitance sensor ac bus by DC/AC changer, and its feature exists In, the method comprises the steps:
(1) micro-capacitance sensor ac bus voltage U, ac bus frequency f and hybrid energy-storing unit comprehensive state-of-charge SOC are obtainedHESS, According to U, f and SOCHESSCarry out upper strata power optimization and control to obtain the output instruction of DC/AC changer, and then control DC/ AC changer works;
(2) DC bus-bar voltage V is obtaineddc, carry out lower floor's power distribution with stable DC busbar voltage for target, respectively obtain storage The charge-discharge electric power instruction of battery and super capacitor, and then control the work of corresponding DC/DC changer.
A kind of hybrid energy-storing hierarchical coordinative control method based on state-of-charge the most according to claim 1, its feature exists In, step (1) power optimization at the middle and upper levels controls to obtain especially by fuzzy logic algorithm, specifically includes:
(101) by ac bus frequency f and ac bus rated frequency frefDeviation through PI regulation obtain active power vacancy value Pref, simultaneously by rated voltage U of ac bus voltage U Yu ac busrefDeviation through PI regulation obtain reactive power vacancy Value Qref
(102) by hybrid energy-storing unit comprehensive state-of-charge SOCHESSWith active power vacancy value PrefAs entering through Fuzzy Control Algorithm processed obtains active power correction value Δ P, simultaneously by hybrid energy-storing unit comprehensive state-of-charge SOCHESSLack with reactive power Volume value QrefReactive power correction value Δ Q is obtained through FUZZY ALGORITHMS FOR CONTROL as input;
(103) to active power vacancy value PrefThe output obtaining DC/AC changer with active power correction value Δ P summation is gained merit Power instruction P 'ref, to reactive power vacancy value QrefWith the output that reactive power correction value Δ Q summation obtains DC/AC changer Reactive power instruction Q 'ref
A kind of hybrid energy-storing hierarchical coordinative control method based on state-of-charge the most according to claim 1, its feature exists In, described hybrid energy-storing unit comprehensive state-of-charge SOCHESSObtained by following formula:
SOC H E S S = Q V R L A B · SOC V R L A B + Q S C · SOC S C Q V R L A B + Q S C ;
Wherein, QVRLAB、QSCIt is respectively accumulator and the rated capacity of super capacitor, SOCVRLAB、QSCIt is respectively accumulator and super The state-of-charge of electric capacity.
A kind of hybrid energy-storing hierarchical coordinative control method based on state-of-charge the most according to claim 1, its feature exists In, described step (2) specifically includes:
(201) by dc bus rated voltage VrefWith DC bus-bar voltage VdcDeviation through PI regulation obtain hybrid energy-storing unit Charge-discharge electric power PHESS
(202) by the charge-discharge electric power P of hybrid energy-storing unitHESSLow frequency component is obtained and as storing by low pass filter filtering Battery charging and discharging power instruction Pbat, high fdrequency component is instructed P as super capacitor charge-discharge electric power simultaneouslysc
A kind of hybrid energy-storing hierarchical coordinative control method based on state-of-charge the most according to claim 4, its feature exists In, obtain accumulator cell charging and discharging power instruction PbatP is instructed with super capacitor charge-discharge electric powerscAfter also need to it is modified, Particularly as follows:
A () asks for serving as electricity corrected output Δ P ' according to following formula:
Δ P '=(SOCsc-SOCQVAR)×|PHESS| × β,
Wherein, SOCVRLAB, QSC are respectively the state-of-charge of accumulator and super capacitor, and PHESS is filling of hybrid energy-storing unit Discharge power, β is correction factor, and β span is 1.1~1.3;
(b) calculating accumulator charge-discharge electric power instruction correction value P 'bat: P 'bat=Pbat+ Δ P ', calculates super capacitor charge and discharge electric work Rate instruction correction value P 'sc: P 'sc=Psc-ΔP′;
And then by accumulator cell charging and discharging power instruction correction value P 'batAs accumulator cell charging and discharging power instruction, super capacitor is filled Discharge power instruction correction value P 'scInstruct as super capacitor charge-discharge electric power, thus control corresponding DC/DC changer work Make.
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CN108365621A (en) * 2018-03-15 2018-08-03 阳光电源股份有限公司 A kind of energy management method, device and system based on energy storage inverter
CN108599276A (en) * 2018-04-09 2018-09-28 华南理工大学 A kind of hybrid energy-storing power distribution method considering secondary distribution
CN109193891A (en) * 2018-10-31 2019-01-11 华北水利水电大学 Extend the improvement mixed energy storage system power distribution method of PMSG battery life
CN110350559A (en) * 2019-07-01 2019-10-18 山东省科学院自动化研究所 It provides multiple forms of energy to complement each other mixed energy storage system voltage hierarchy system and energy management method
CN111404181A (en) * 2020-03-19 2020-07-10 国电联合动力技术有限公司 Multi-energy coupling complementary energy storage system and energy storage control method

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