CN106571643A - Optical storage microgrid system control method - Google Patents
Optical storage microgrid system control method Download PDFInfo
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
An optical storage microgrid system control method is characterized by utilizing an energy management system of an optical storage microgrid system to detect the harmonic content and the power factors at a point of common coupling of the optical storage microgrid system, adopting a multiple proportion resonant controller under the rotational coordinates to realize the astatic control of a fundamental current and a harmonic current, and optimizing and controlling an energy storage converter of the optical storage microgrid system to realize the reactive current compensation and harmonic current compensation functions of the optical storage microgrid system under a grid connected mode, eliminate the specified harmonic in the optical storage microgrid system and improve the electric energy quality of the optical storage microgrid system.
Description
Technical field
The present invention relates to a kind of control method that micro-grid system is stored up for light.
Background technology
With the fast development of new forms of energy, the output-power fluctuation caused by external environmental condition, electrical network is caused very
Big impact, makes centralized new forms of energy development be subject to originally more challenge.Micro-grid system arises at the historic moment, and micro-capacitance sensor is (referred to as
Microgrid) refer to by distributed power source, energy storage device, energy conversion device and associated loadings constitute can realize self-contr ol,
Protection and the autonomous system for managing, the appearance of microgrid solves well the contradiction between new forms of energy and electrical network, makes distributed electrical
Source output is controllable, thus has friendly to electrical network.When micro-capacitance sensor operates in grid-connect mode, in light storage micro-grid system
Main control unit energy accumulation current converter be able to can be performed corresponding according to EMS operational management strategy Jing row power dispatchings
Energy management strategies.
With the electrical equipments such as nonlinear-load and induction machine it is more and more, light storage micro-grid system exist power factor compared with
It is low, the problems such as harmonic pollution is serious, make the utilization ratio reduction of electric energy in micro-grid system, device of overheating of electrical, electrical equipment
Use the lost of life.There is identical system topological in view of the energy accumulation current converter and active electric filter device in micro-grid system, can
By carrying out function optimization to energy accumulation current converter, to implement to mend performing while EMS scheduling provides active power
System harmonicses and reactive power are repaid, the micro-grid system internal loading quality of power supply is improved on the basis of investment is not increased.
Harmonic wave control and reactive-load compensation can be using passive device scheme and active device schemes in micro-grid system.Passive device
Part scheme primary structure is together in series with capacitor with reactor, constitutes LC series loops, and in being parallel to system, LC loops are humorous
Vibration frequency is set in the harmonic frequency for needing to filter, and is reached and is filtered the purpose for formulating this harmonic wave.Its advantage is low cost, but
Can not be bad to the full remuneration of harmonic wave, filter effect, and the post-compensation frequency that equipment design is completed has been fixed from becoming
It is dynamic, if resonant frequency setting is bad, resonance can be produced with system, affect micro-grid system stability.
Conventional electric power active filter adopts load current harmonic compensation method, by detecting that load current extracts harmonic wave electricity
Stream, harmonic current is used as control instruction reference value.Current follow-up control is generally basede on PI controllers under single synchronous selection coordinate system,
Because PI controllers have steady-state error to harmonic controling, therefore primary current filter compensation effect is limited；There is document to propose
Controlled based on the PI under many synchronous rotating frames, but because substantial amounts of coordinate transform amount causes to calculate complicated, to controller
Requirement of real-time it is higher.
The content of the invention
The purpose of the present invention be overcome nonlinear load to cause the quality of power supply in micro-grid system is poor, power factor is relatively low,
Individually administering needs hardware to put into, and conventional active filter can not eliminate the shortcoming of specified subharmonic, proposes a kind of light
The control method of storage micro-grid system.The present invention can realize microgrid system to energy accumulation current converter optimal control in micro-grid system
Reactive-current compensation and harmonic current compensation function of the system under grid-connect mode, can be completely eliminated in theory light storage micro-grid system
Interior specified subharmonic, while micro-grid system internal electric energy quality is improved, embodies friendly of the micro-grid system to electrical network.
The present invention using light storage micro-grid system EMS detection light storage micro-grid system points of common connection (PCC,
Point of Common Coupling) place's harmonic content and power factor, using the multiple ratio resonance control under rotational coordinates
Device processed realizes the zero steady state error control to fundamental current harmonic electric current；By storing up the optimization control of micro-grid system energy accumulation current converter to light
System, realizes reactive-current compensation and harmonic current compensation function of the light storage micro-grid system under grid-connect mode, eliminates light storage microgrid
Subharmonic is specified in system, improves the micro-grid system quality of power supply.
Photovoltaic generating system, accumulator, energy accumulation current converter, harmonic wave are included using light of the present invention storage micro-grid system
Detector, EMS and load.Wherein, energy accumulation current converter is 3 port devices, is exchanged with 2 comprising 1 DC port
Port, DC port connects accumulator, and 2 AC ports are divided into and net side and off-network side, and net side connection bulk power grid, and off-network side connects
Connect photovoltaic generating system and load.Harmonic Measurer is detected to information about power at light storage micro-grid system points of common connection.Energy
Each point electric information in buret reason system acquisition light storage micro-grid system, and light storage micro-grid system is controlled, work as electric network fault
When, energy accumulation current converter runs on off-network pattern, is that light storage micro-grid system sets up voltage and frequency；When electrical network is normal, energy storage becomes
Stream device runs on grid-connect mode, receives the power dispatching of EMS, performs different energy management strategies.
The present invention realizes the nothing to fundamental current harmonic electric current using the multiple ratio resonant controller under rotational coordinates
Static difference is controlled.Described multiple ratio resonant controller includes voltage detection unit, current detecting unit, PLL phase locking units, just
Negative phase-sequence separative element, multiple ratio resonant control unit and PWM control units.Described voltage detection unit and current detecting list
Respectively detection light stores up micro-grid system PCC point voltages and electric current for unit, and by positive-negative sequence separative element the positive and negative sequence of voltage is extracted respectively
Component and electric current positive and negative sequence component.The voltage positive-sequence component of light storage micro-grid system PCC points obtains electrical network through PLL phase locking units
Voltage angular frequency and phase place.Light storage micro-grid system PCC point electric currents are separated into forward-order current after positive-negative sequence separative element And negative-sequence currentBy forward-order currentAnd negative-sequence currentPass through respectively
Clark transforms to positive sequence α βPWith negative phase-sequence α βNShafting, positive sequence α βPShafting changes to positive sequence dq through ParkPShafting, dqPUnder shafting
Watt current reference valueWith reactive current reference valuePositive sequence α β is transformed to through anti-parkPWatt current under shafting is given
It is fixedIt is given with reactive currentDue to dqPThe DC quantity of watt current, reactive current under shafting is given as α βPUnder shafting
Fundamental wave sinusoidal quantity, so if dqPThe watt current and reactive current of axle is given as DC quantity, equivalent to α βPFundamental wave electricity under shafting
Stream is given as sinusoidal quantity and all higher harmonic currents are given as 0, when light storage micro-grid system PCC points electric current has different subharmonic
When, described multiple ratio resonant control unit increases the ratio resonant controller for specifying subharmonic, due to ratio harmonic controling
Device can realize DAZ gene to equivalent harmonic wave, therefore, it is possible to the subharmonic is completely eliminated.Meanwhile, negative phase-sequence α βNUnder shafting
Negative-sequence current componentWithReference value given value of current is 0, and negative phase-sequence is adopted and positive sequence identical controller, it is possible to achieve negative phase-sequence electricity
The specified subharmonic of stream is eliminated.
Transmission function G of multiple ratio resonance harmonic controllerPRExpression formula is as follows：
In formula (1), ω0For fundamental wave angular frequency, n is overtone order, kpFor proportionality coefficient, knFor nth harmonic resonance system
Number.
Under synchronous rotary dq shaftings, be present coupling in watt current and reactive current, using decoupled active and reactive, realized
Work(electric current and reactive current are individually controlled, while grid-connected harmonic current is suppressed, there is provided reactive-load compensation.
The multiple ratio resonance Harmonic Control Method that the present invention is adopted does not need complicated synchronous rotating frame conversion, leads to
Cross multiple ratio example resonant controller and realize that AC signal realizes DAZ gene, to the energy accumulation current converter control method step
For：
1st, voltage detection unit detection light storage micro-grid system PCC point voltages, extract respectively through positive-negative sequence separative element
Positive sequence voltage component and negative sequence voltage components, to electrical network positive sequence voltage through PLL digital servo-control ring elements, obtain light storage microgrid system
System PCC point fundamental voltage phase places；
2nd, current detecting unit detection light storage micro-grid system PCC point phase currents are respectively ia、ib、ic, separate through positive-negative sequence
Unit, extracts respectively forward-order current componentAnd negative-sequence current component
3rd, fundamental positive sequence current componentJing coordinate transforms, under transforming to biphase synchronous rotating frameWhereinRepresent active current,Represent reactive current component,WithStatic α β are changed to through anti-parkPAxle
It is sinusoidal quantity that system is lower.Multiple ratio resonant controller includes fundamental current control harmonic current control, due to ratio resonance control
Device processed has infinite large gain at fundamental wave and correspondence subfrequency, and fundamental current and correspondence subharmonic electricity can be realized in theory
The zero steady state error control of stream；
4th, described energy accumulation current converter according to light store up micro-grid system EMS scheduling active power of output and
Reactive power, and to specifying subharmonic to eliminate.Positive sequence fundamental current is given as active and idle given, positive sequence harmonic electric current
0 is controlled to, negative phase-sequence fundamental wave and harmonic current give and be 0, realize that negative-sequence current is controlled to 0；
5th, described EMS real-time detection light storage micro-grid system points of common connection PCC harmonic contents and power because
The energy accumulation current converter of number, energy system and light storage micro-grid system enters row information and exchanges by Modbus agreements, energy accumulation current converter root
Reactive power harmonic electric current in micro-grid system is compensated according to energy management strategies, meeting the micro-grid system quality of power supply will
Ask.
EMS by power quality analyzer real-time monitoring grid entry point harmonic wave and power factor, when grid entry point it is humorous
When ripple exceedes the threshold value of setting, by resonance coefficient knArrange nonzero value to enable specified subharmonic control, this can be eliminated
Subharmonic, while can manually set to eliminate by EMS system eliminating humorous in energy range in energy accumulation current converter
Ripple.Nonlinear Integer current load in light storage micro-grid system is typical harmonic source, and the present invention is to television set, energy-conservation in micro-grid system
5,7,11,13 subharmonic of the maximum harmonic content of the non-linear household loads generation such as lamp, computer, charger carry out acquiescence and disappear
Remove, other subharmonic are eliminated according to energy management strategies, when benefit of the harmonic current beyond energy accumulation current converter in micro-grid system
When repaying capacity, the compensation wherein larger harmonics of hazard ratio can be only selected.If already installed with nothing in micro-grid system
Source filter, can select to compensate passive filter compensate less than harmonics, multiple ratio resonance harmonic controling reason
By above can realizing eliminating any subharmonic, but the frequency of digital signal processor is constrained to, in light storage microgrid system
25 subharmonic of maximum elimination are considered in system.
Multiple ratio resonance of the present invention is controlled to the control harmonic ratio resonance control of fundamental wave ratio resonance
Superposition.Energy accumulation current converter gathers PCC point voltages, locks after positive-negative sequence is separated and mutually obtains electrical network fundamental wave angular frequency and phase place, adopts
Collection PCC point electric currents, separate control and isolate electric current positive sequence and negative sequence component, positive sequence fundamental wave three-phase current using positive-negative sequenceJing coordinate transforms, under transforming to biphase synchronous rotating frameWhereinRepresent active current,
Represent reactive current component.Active given electric current and idle given electric current change through anti-park under synchronous rotating frame,
Transform to biphase positive sequence rest frame α βPIt is controlled under shafting, while it is zero to control negative phase-sequence fundamental current harmonic electric current.
Multiple ratio resonance harmonic controling is that the control of fundamental wave ratio resonance and the control of multiple harmonic ratio resonance are in parallel, due to multiple ratio
Resonance harmonic controling infinite large gain at fundamental wave harmonic, thus multiple ratio resonance control can realize to fundamental wave and specify
The indifference control of subharmonic.
The existing method for carrying out closed loop elimination to PCC point harmonic waves, usually detects the harmonic current at harmonic source, by controlling
Equipment sends reverse output current and compensates, and if any many places harmonic source, to carry out current detecting to each harmonic source.This
Bright advantage is no matter light stores up how many harmonic source in micro-grid system, only to detecting at light storage micro-grid system PCC points one
Control.
The effect of the present invention：
(1) the light storage micro-grid system quality of power supply is improved.Using multiple ratio resonance harmonic controller, in theory can be complete
The harmonic wave that nonlinear load is produced in micro-grid system is eliminated, electricity is realized on the basis of Active Power Filter-APF hardware device is not increased
Stream harmonics restraint, improves the quality of power supply in micro-grid system.
(2) compared with not carrying out specifying the control strategy of subharmonic compensation, the present invention can be to specifying secondary in micro-grid system
Harmonic wave is eliminated, and harmonic compensation mode is flexible.
(3) dynamic passive compensation, can improve micro-grid system power factor with reactive power in dynamic compensation micro-grid system.
(4) traditional active electric filter device needs harmonic current at detection load, when non-linear negative in micro-grid system
When carrying position farther out, Acquisition Circuit cost increases, proposed by the present invention based on PCC point harmonic current compensations, only need to be by energy storage electricity
Flow sensor is arranged on place, and circuit is simple.
Description of the drawings
Fig. 1 light stores up micro-grid system topological diagram；
Fig. 2 energy accumulation current converter topological diagrams；
The multiple ratio resonance of Fig. 3 specifies this harmonic controller schematic diagram；
The multiple ratio resonance harmonics restraint control figure of Fig. 4 energy accumulation current converters.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
As shown in figure 1, including photovoltaic generating system, energy-storage system, energy management using the light storage micro-grid system of the present invention
System, power quality analyzer and load, wherein energy-storage system include accumulator and energy accumulation current converter, and energy accumulation current converter has three
Port, DC port connects accumulator, and AC port has grid-connected side ports and off-network side ports, and photovoltaic generating system and load are accessed
The exchange side ports bus of energy accumulation current converter, the grid-connected side ports of energy accumulation current converter access electrical network, and power quality analyzer is to PCC points
Power and the quality of power supply carry out real-time monitoring and analysis.Control of the present invention to micro-grid system passes through energy-storage system, energy storage unsteady flow
Device and power quality analyzer are realizing.
Simultaneously net side is connected to bulk power grid, energy accumulation current converter load-side to energy-storage system by light storage micro-grid system points of common connection
Respectively connection is for photovoltaic system and load.Power quality analyzer is supervised to the light storage micro-grid system points of common connection quality of power supply
Survey, energy-storage system is monitored and controls to light storage electricity generation system, energy-storage system, load and power quality analyzer, and carries out
Integrated dispatch.EMS system and energy accumulation current converter pass through Modbus protocol communications.
1st, voltage detection unit detection light storage micro-grid system PCC point AB, BC, CA line voltages eab、ebc、eca, according to formula
(2) PCC point phase voltages e are calculateda、eb、ec。
2nd, when three-phase power imbalance in light storage micro-grid system, can be three-phase imbalance amount point according to symmetrical component method
For positive and negative component, negative sequence component, positive-negative sequence is separated and realized using all-pass filter, all-pass filter can input and output it
Between realize 90 degree of phase shifts, and keep amplitude constant, the transmission function of all-pass filter is shown in formula (3).
Digital Discrete conversion is carried out to above-mentioned formula, the difference formula of 90 degree of phase shifts is obtained, is then converted according to positive-negative sequence
Between the detached extraction of relational implementation positive-negative sequence.PCC point phase voltages ea、eb、ecPositive sequence voltage is after positive-negative sequence separative element Negative sequence voltage is
3rd, micro-grid system PCC point positive sequence voltage components are stored up to lightThrough PLL digital servo-control ring elements, obtain
Light stores up micro-grid system PCC point fundamental voltage phase thetasp。
4th, current detecting unit detection light storage micro-grid system PCC point phase current ia、ib、ic, after positive-negative sequence separative element
Forward-order current isNegative-sequence current is
5th, under three-phase static coordinate system the positive and negative sequence voltage of PCC points, electric current transform to biphase static α β shaftings through clark
It is lower to be respectivelyWithWherein shown in clark transformation for mula such as formula (4).
6th, watt current of the present invention and giving for reactive current are carried out under synchronous rotating frame, biphase static α β shaftings
Shown in transformation for mula such as formula (5) under biphase synchronous rotary dq shaftings.Watt current and nothing in coordinate system is selected due to synchronous
There is coupling in work(electric current, need to carry out decoupled active and reactive control, and Uncoupled procedure is as shown in Figure 4；
Watt current is instructed and referenced reactive current is DC quantity, shown in active power and reactive power such as following formula (6), by
In based on grid voltage orientation, eq=0, then above formula can be reduced to formula (7), when voltage ripple of power network is not considered, electrical network electricity
Pressure d axle component edFor definite value, by controlling watt current set-pointReactive power can be controlled；Control reactive current gives
ValueReactive power can be controlled；
Wherein：edFor line voltage d axle components, eqFor line voltage q axle components, idrefFor watt current set-point, iqref
For reactive current set-point.When detecting micro-grid system internal power factor and being relatively low, EMS is according to energy management plan
Slightly Reactive Power Dispatch instruction is sent to energy accumulation current converter by Modbus communications protocol, energy accumulation current converter refers to according to EMS
Order, adjustment is idle to meet micro-grid system requirement.
7th, active and reactive current component enters α β under static coordinate after anti-park changes under synchronous rotary dq shaftings
Shafting, watt current, reactive current reference value are under positive sequence α β shaftings Jing after coordinate transform under positive sequence dq axleWithWhereinFor fundamental wave sinusoidal quantity；Multiple ratio harmonic controller discretization output current is shown in formula (8)；Meanwhile, negative-sequence current
Set-pointIt is given as 0；
Wherein n be resonant controller number of times, uPR_n(k) be n resonant controller k moment output voltage, TsFor digital display circuit
Sampling period, ierr(k) be α β shaftings under given value of current and current feedback difference, kpFor resonance coefficient, krFor resonance coefficient.
8th, in order to suppress voltage ripple of power network and realize control quick response effect, the present invention adopts voltage feed-forward control control
System, as shown in formula (9), can obtain positive-negative sequence controlled output voltage under α β shaftings and be respectively
vα=eα+upr (9)
Wherein vαFor controlled output voltage, eαFor line voltage, uprFor multiple ratio resonant controller output voltage.
9th, controlled output voltage is respectivelyThrough anti-clark changes, positive sequence controlled output voltage is obtainedWith negative phase-sequence controlled output voltage
10th, it is overlapped according to formula (10) positive sequence, negative phase-sequence controlled output voltage, obtains output voltage instruction va、vb、vc；
Voltage va、vb、vcThrough SVPWM control units, output PWM switching drive signal driving switch pipes are opened and closed, and produce expectation
Electric current and realize control to harmonic current；
EMS is according to different energy management operation reserves to energy accumulation current converter output current and harmonic carcellation
Number of times is scheduled, and improves micro-grid system power factor and reduces harmonic content in micro-grid system, so as to improve in micro-grid system
The quality of power supply.
Claims (4)
1. a kind of light stores up micro-grid system control method, it is characterised in that：Described control method stores up micro-grid system energy using light
Harmonic content and power factor at buret reason system detectio light storage micro-grid system points of common connection, using multiple under rotational coordinates
Ratio resonant controller realizes the zero steady state error control to fundamental current harmonic electric current；Become by storing up micro-grid system energy storage to light
Stream device optimal control, realizes reactive-current compensation and harmonic current compensation function of the light storage micro-grid system under grid-connect mode, disappears
Except specified subharmonic in light storage micro-grid system, improve the micro-grid system quality of power supply；
The control method step of the light storage micro-grid system energy accumulation current converter is as follows：
(1) the commonly connected point voltage of voltage detection unit detection light storage micro-grid system, extracts respectively through positive-negative sequence separative element
Go out positive sequence voltage component and negative sequence voltage components, to electrical network positive sequence voltage through PLL digital servo-control ring elements, obtain light storage microgrid
System points of common connection fundamental voltage phase place；
(2) current detecting unit detection light storage micro-grid system points of common connection phase current is respectively ia、ib、ic, through positive-negative sequence point
From unit, forward-order current component is extracted respectivelyAnd negative-sequence current component
(3) fundamental positive sequence current componentJing coordinates are under biphase synchronous rotating frameWhereinRepresent
Active current,Represent reactive current component, active currentAnd reactive current componentChange to through anti-park
Static α βPIt is sinusoidal quantity under shafting；Multiple ratio resonant controller include fundamental current control harmonic current control, due to than
Example resonant controller has infinite large gain at fundamental wave and correspondence subfrequency, can realize fundamental current and correspondence subharmonic
The zero steady state error control of electric current；
(4) energy accumulation current converter described in stores up the scheduling active power of output of EMS of micro-grid system and idle according to light
Power, and to specifying subharmonic to eliminate；Positive sequence fundamental current is given as active and idle given, positive sequence harmonic current control
For 0, negative phase-sequence fundamental wave and harmonic current is given is 0 realizes that negative-sequence current is controlled to 0.
2. light according to claim 1 stores up micro-grid system control method, it is characterised in that：Described multiple ratio resonance
Transmission function G of harmonic controllerPRExpression formula is：
ω0For fundamental wave angular frequency, n is overtone order, kpFor proportionality coefficient, knFor nth harmonic resonance coefficient.
3. light according to claim 1 stores up micro-grid system control method, it is characterised in that：Described multiple ratio harmonic wave
Controller is：
Wherein n be resonant controller number of times, uPR_n(k) be n resonant controller k moment output voltage, TsFor digital display circuit sampling
Cycle, ierr(k) be α β shaftings under given value of current and current feedback difference, kpFor proportionality coefficient, krFor resonance coefficient.
4. light according to claim 1 stores up micro-grid system control method, it is characterised in that：Described EMS
Real-time detection light stores up micro-grid system points of common connection harmonic content and power factor, and energy system and light store up the energy storage of micro-grid system
Current transformer enters row information and exchanges by Modbus agreements, and energy accumulation current converter is according to energy management strategies to idle work(in micro-grid system
Rate harmonic electric current is compensated, and meets the requirement of the micro-grid system quality of power supply；To micro-grid system maximum harmonic content 5,7,11,
13 subharmonic carry out acquiescence elimination, and other subharmonic are eliminated according to energy management strategies；When harmonic current in micro-grid system
Beyond the compensation capacity of energy accumulation current converter when, the compensation wherein larger harmonics of hazard ratio are only selected, while passing through energy
Management system system manually sets to eliminate and eliminates the harmonic wave in energy range in energy accumulation current converter.
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| CN201610913975.2A CN106571643B (en) | 2016-10-20 | 2016-10-20 | Light storage micro-grid system control method |
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| CN201610913975.2A CN106571643B (en) | 2016-10-20 | 2016-10-20 | Light storage micro-grid system control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108988397A (en) * | 2017-05-31 | 2018-12-11 | 许继电气股份有限公司 | A kind of energy accumulation current converter parallel running power distribution control method |
| CN109599878A (en) * | 2018-12-07 | 2019-04-09 | 南京工程学院 | A kind of energy accumulation current converter control method towards electric energy quality optimizing demand |
| CN110943245A (en) * | 2019-12-12 | 2020-03-31 | 上海捷氢科技有限公司 | Fuel cell diagnosis harmonic current generation method and system and diagnosis device |
| CN111446726A (en) * | 2020-04-03 | 2020-07-24 | 太原理工大学 | Rapid positive-negative sequence separation method for power grid asymmetry and harmonic fault |
| CN111585294A (en) * | 2020-05-29 | 2020-08-25 | 天津电气科学研究院有限公司 | Method for centralized compensation of three-phase current imbalance of submerged arc furnace power supply system |
| CN113206504A (en) * | 2021-06-10 | 2021-08-03 | 荣信汇科电气股份有限公司 | Power supply network voltage comprehensive compensation control method based on chain type power electronic converter |
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| CN104836235A (en) * | 2015-06-02 | 2015-08-12 | 国家电网公司 | Microgrid multi-inverter parallel operation control method adopting bus voltage compensation |
| EP3041109A1 (en) * | 2013-08-30 | 2016-07-06 | Kyocera Corporation | Distributed power supply system and power conditioner |
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| EP3041109A1 (en) * | 2013-08-30 | 2016-07-06 | Kyocera Corporation | Distributed power supply system and power conditioner |
| CN104836235A (en) * | 2015-06-02 | 2015-08-12 | 国家电网公司 | Microgrid multi-inverter parallel operation control method adopting bus voltage compensation |
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| CN108988397A (en) * | 2017-05-31 | 2018-12-11 | 许继电气股份有限公司 | A kind of energy accumulation current converter parallel running power distribution control method |
| CN108988397B (en) * | 2017-05-31 | 2021-10-22 | 许继电气股份有限公司 | Parallel operation power distribution control method for energy storage converters |
| CN109599878A (en) * | 2018-12-07 | 2019-04-09 | 南京工程学院 | A kind of energy accumulation current converter control method towards electric energy quality optimizing demand |
| CN110943245A (en) * | 2019-12-12 | 2020-03-31 | 上海捷氢科技有限公司 | Fuel cell diagnosis harmonic current generation method and system and diagnosis device |
| CN111446726A (en) * | 2020-04-03 | 2020-07-24 | 太原理工大学 | Rapid positive-negative sequence separation method for power grid asymmetry and harmonic fault |
| CN111446726B (en) * | 2020-04-03 | 2023-04-21 | 太原理工大学 | Rapid positive and negative sequence separation method for power grid asymmetry and harmonic faults |
| CN111585294A (en) * | 2020-05-29 | 2020-08-25 | 天津电气科学研究院有限公司 | Method for centralized compensation of three-phase current imbalance of submerged arc furnace power supply system |
| CN113206504A (en) * | 2021-06-10 | 2021-08-03 | 荣信汇科电气股份有限公司 | Power supply network voltage comprehensive compensation control method based on chain type power electronic converter |
| CN114756072A (en) * | 2022-04-26 | 2022-07-15 | 江苏微导纳米科技股份有限公司 | Electric energy management method and related device for pure resistance heating system |
| CN114756072B (en) * | 2022-04-26 | 2023-11-10 | 江苏微导纳米科技股份有限公司 | Electric energy management method and related device for pure resistance heating system |
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