CN106100036A - A kind of operation method of the charging pile with energy storage device - Google Patents
A kind of operation method of the charging pile with energy storage device Download PDFInfo
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- CN106100036A CN106100036A CN201610520337.4A CN201610520337A CN106100036A CN 106100036 A CN106100036 A CN 106100036A CN 201610520337 A CN201610520337 A CN 201610520337A CN 106100036 A CN106100036 A CN 106100036A
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Classifications
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- H02J7/0027—
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/11—DC charging controlled by the charging station, e.g. mode 4
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/30—Constructional details of charging stations
- B60L53/31—Charging columns specially adapted for electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/63—Monitoring or controlling charging stations in response to network capacity
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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
- H02J3/1892—Arrangements for adjusting, eliminating or compensating reactive power in networks the arrangements being an integral part of the load, e.g. a motor, or of its control circuit
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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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
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses the operation method of a kind of charging pile with energy storage device, by this operation method, in the case of the not increase-volume of existing power distribution network, energy storage device is utilized to realize the high-power quick charge of electric automobile, realize the buffering between power distribution network and charging pile, reduce the interference in short-term to power distribution network and impact, in addition this system also solves the problem that current electric automobile charging pile side harmonics comparision contents is big, and the fundamental reactive current in load current can be filtered, negative-sequence current, zero-sequence current and harmonic current, leave behind fundamental positive sequence real component, avoid the impact of zero sequence lobe error, the efficiency of significant increase charging and safety.
Description
Art
The present invention relates to the operation method of a kind of charging pile with energy storage device.
Background technology
Along with the continuous intensification of global energy crisis, on increasingly exhausted and atmospheric pollution, the Global Temperature of petroleum resources
The harm aggravation risen, energy-conservation and reduction of discharging is the main direction of future automobile technology development.Toyota Company of Japan takes the lead in developing mixed
Close power vehicle Prius, open the epoch prelude of electric automobile.Electric automobile is as the vehicles of a new generation, energy-conservation
Reduce discharging, the minimizing mankind possess, to the relying party face of traditional fossil energy, the advantage that orthodox car is incomparable.Since 2009, in
Government of state is intensive to have put into effect and has encouraged electric automobile and the policies and measures of relevant industries development, and enterprise is to the research and development of electric automobile and product
Industryization puts into and is obviously enhanced.
When electric automobile rechargeable battery energy resource consumption to a certain extent time, it is necessary to use energy resource supply device to this battery
Being charged, to ensure that electric automobile is reused, reach the purpose of " replacing oil by electricity ", therefore energy resource supply device is to electronic vapour
Promoting the use of of car has irreplaceable effect.Energy resource supply device mainly has two kinds of forms, and one is direct-current charging post, should
Charging pile power is relatively big, about 100kW, and the charging interval is short, and volume ratio is relatively big, is therefore typically mounted at fixing place；Another
Planting is alternating-current charging pile, directly utilizes AC network, output AC electric energy, and the vehicle-mounted charge stake carried by electric automobile will be handed over
It is that rechargeable battery is charged that stream electric energy is converted to direct current energy.This kind of charged form power is less, and generally about 10kW fills
The electricity time is long, and volume is little, and each corner that therefore can make full use of city is that electric automobile is charged.
Due to the restriction of existing electrical network AF, build an electric automobile charging station, relate to the increase-volume of electrical network, city
The adjustment of city's planning etc. a series of significant problem, the big transformation of national grid is not minor matter, costly, from discussing, setting up the project
To becoming net, non-overnight can realize.At present, in the case of the not increase-volume of existing electrical network, existing charger be difficult to
The function of the high-power quick charge of electric automobile.
Owing to existing charger lacks buffer unit between electrical network and electric automobile battery charger, when charger is given electronic
During the high-power quick charge of automobile, interference in short-term that electrical network can be caused by charger and impact.
The charging pile and the load carried that use due to charging pile are non-linear equipments, the most operationally can give electrical network
The quality of power supply brings deleterious effect, is mainly reflected in power factor of electric network and declines and bring the aspects such as harmonic pollution to electrical network.
The harm that wherein electrical network is caused by harmonic pollution mainly has the following aspects: voltage that harmonic current causes and heat condition meeting
The service life causing power factor correction capacitor shortens；Owing to mechanical vibration can be by fundamental frequency magnetic field and harmonic current
Impact, when mechanical resonant frequency and electric excitation frequency are equal, it may occur that resonance thus produce bigger mechanical stress, broken
Bad equipment；Harmonic wave can cause system to the some error in judgement that voltage zero-cross and voltage are zero；Harmonic current can cause transformer fe
Damage and the increase of copper loss；Electronic equipment and relay protection are produced interference；Harmonic current can cause equipment malfunction to be made, may in
Disconnected production and operation.
Summary of the invention
For solving the problems referred to above, the present invention provides the operation method of a kind of charging pile with energy storage device, passes through the party
Method, in the case of the not increase-volume of existing power distribution network, utilizes energy storage device to realize the high-power quick charge of electric automobile, it is achieved distribution
Buffering between net and charging pile, reduces the interference in short-term to power distribution network and impact, and this system also solves the most electronic in addition
The problem that automobile charging pile side harmonics comparision contents is big, and the fundamental reactive current in load current, negative phase-sequence electricity can be filtered
Stream, zero-sequence current and harmonic current, leave behind fundamental positive sequence real component, it is to avoid the impact of zero sequence lobe error, greatly carries
Efficiency and the safety of charging are risen.
To achieve these goals, the present invention provides the operation method of a kind of charging pile with energy storage device, operation side
Method comprises the steps:
S1. the maximum access power that energy storage device allows with power distribution network from power distribution network draws electric energy by input translator
Until being full of, now energy storage device is in holding state, the electric vehicle rapid charging that can be charged to needs at any time；
S2. when charging pile is to charging electric vehicle, make energy storage device cut off electrical network, utilize accumulated energy flywheel Electricity Generation
Machine carries out repid discharge in short-term to the set of cells of electric automobile, meets its demand to quick charge；
S3. charging pile run duration, detects System Reactive Power and the harmonic wave size of current of charging pile in real time；
S4. according to the idle and harmonic wave size of current detected, carry out reactive-load dynamic compensation and harmonic filtration in real time, ensure
Charging pile safety and economic operation.
Preferably, in step sl, in normal state, energy storage device monitoring detects energy storage device in real time with scheduler module
Energy storage state, according to testing result, at any time energy storage device is carried out between power distribution network and charging terminal switching.
Preferably, described energy storage device includes the first accumulated energy flywheel and the second accumulated energy flywheel, when the first accumulated energy flywheel or
When two accumulated energy flywheels need to be charged, this system sends instruction, opens charge switch, is charged accumulated energy flywheel, and time
Time detection accumulated energy flywheel charged state, when the electricity of accumulated energy flywheel reaches saturated, system sends instruction, charge closing again
Switch, stops the charging to accumulated energy flywheel.Now, accumulated energy flywheel is in holding state, waits electric discharge instruction to be received.
Preferably, in step s 2, accumulated energy flywheel is in discharge process, and flywheel reduction of speed drives electrical power generators, through DC/
DC conversion module, then by the charging terminal set of cells quick charge to electric automobile.
In S3, the detection of harmonic current concretely comprises the following steps:
S31. by load current ia、ib、icResolve into first-harmonic ia1、ib1、ic1With harmonic wave iak、ibk、ickSum；
S32. in view of three-phase imbalance, by current first harmonics electric current ia1、ib1、ic1It is divided into positive sequence, zero sequence and negative sequence component,
Then harmonic current iak、ibk、ickPositive sequence, zero sequence and negative sequence component can also be decomposed into；
S33. three-phase instantaneous powerDecomposition result above-mentioned steps obtained substitutes into this formula, can obtain:
Middle I1+、I1-It is respectively fundamental positive sequence and negative sequence component, Ik+、Ik-It is respectively k subharmonic positive sequence and negative sequence component,
θ1-It is the initial phase of first-harmonic negative phase-sequence, θk+、θk-It is k subharmonic positive sequence and the initial phase of negative phase-sequence respectively.Above formula harmonic frequency is
Low up to 100Hz, through low pass filter (LFP), then the harmonic component in three-phase instantaneous power just can filter off completely, the most remaining
Steady-state valueSuch that it is able to the fundamental reactive current obtaining having filtered in load current, negative-sequence current, zero
Sequence electric current and harmonic current, leave behind fundamental positive sequence real component, it is to avoid the impact of zero sequence lobe error.
Preferably, if in view of the situation of three-phase imbalance, then load-side fundamental current can be decomposed into positive sequence, negative phase-sequence
With zero-sequence component ia1、ib1、ic1, then harmonic current can also be decomposed into positive sequence, negative phase-sequence and zero-sequence component iak、ibk、ick, wherein
Three-phase instantaneous power p isThe component of above-mentioned decomposition is substituted into this respectively
Formula, can obtain；
Wherein I1+、I1-、I10It is respectively fundamental positive sequence and negative sequence component, Ik+、Ik-、Ik0Be respectively k subharmonic positive sequence and
Negative sequence component, θ1-It is the initial phase of first-harmonic negative phase-sequence, θk+、θk-It is k subharmonic positive sequence and the initial phase of negative phase-sequence respectively,It is
Power-factor angle.
Preferably, in step s 4, the following reactive-load dynamic compensation method of concrete employing realizes reactive-load dynamic compensation and harmonic wave
Filter:
S41. System Reactive Power and harmonic wave size of current detected by harmonic detecting module, as command signal, become with PWM
The output electric current of stream device compares, and error size obtains one group of PWM ripple compared with the ring width of hysteresis comparator；
S42.PWM ripple is sent to the end that controls of power device and controls the switch of power device, follows idle and harmonic current；
S43.PWM current transformer will be with idle and harmonic wave size of current is equal, and electric current in opposite direction is injected into power distribution network side,
Cancel out each other with the idle and harmonic current comprised in power distribution network side, thus it is idle and harmonic current to reach to eliminate power distribution network side
Purpose.
Present invention have the advantage that (1), in the case of the not increase-volume of existing power distribution network, utilizes energy storage device to realize electricity
The high-power quick charge of electrical automobile, it is achieved the buffering between power distribution network and charging pile, reduces the interference in short-term to power distribution network and punching
Hit；(2) by the present invention, solve the problem that current electric automobile charging pile side harmonics comparision contents is big, and can filter
Fundamental reactive current, negative-sequence current, zero-sequence current and harmonic current in load current, leaves behind fundamental positive sequence real component,
Avoid the impact of zero sequence lobe error.
Accompanying drawing explanation
Fig. 1 shows the block diagram of a kind of charging pile with energy storage device of the present invention；
Fig. 2 shows the flow chart of the operation method of a kind of charging pile with energy storage device.
Detailed description of the invention
Fig. 1 shows a kind of charging pile 10 with energy storage device, and this charging pile bag 10 includes:
Multiple charging terminals 12, for being charged the set of cells of multiple electric automobiles；
Active Power Filter-APF 13, carries out harmonic filtration in real time to charging pile, improve power that charging pile runs because of
Element；
Energy storage device 14, for absorbing electric energy from power distribution network, and for offer electric energy quick to charging terminal；
Supervising device 11, for controlling the operation of charging pile, this supervising device 11 includes:
Harmonic detecting module 111, for the idle and harmonic wave size of current of detection charging pile in real time；
Energy storage device monitoring and scheduler module 112, for the energy storage state of detection energy storage device in real time, according to detection knot
Really, at any time energy-storage units is carried out between power distribution network and charging terminal switching；
Charging service and control module 113, for controlling the above-mentioned each charging terminal charge power to set of cells, control
Active Power Filter-APF carries out harmonic filtration to charging pile.
Preferably, described energy storage device 14 includes the first accumulated energy flywheel and the second accumulated energy flywheel, described first accumulated energy flywheel
The maximum access power allowed with power distribution network 20 with the second accumulated energy flywheel draws electric energy by input translator until being full of, now
Described first accumulated energy flywheel and the second accumulated energy flywheel are in holding state, can be reached by charging terminal and be charged to needs
Electric vehicle rapid charging, in work process, energy storage device monitoring with scheduler module can be according to the first accumulated energy flywheel and second
The energy storage state of accumulated energy flywheel carries out discharge and recharge switching, it is ensured that inside can meet the charge requirement of electric automobile at any time.
Preferably, when the first accumulated energy flywheel or the second accumulated energy flywheel need to be charged, described energy storage device monitoring with
Scheduler module 112 sends instruction, opens charge switch, is charged accumulated energy flywheel, and detects the charging of accumulated energy flywheel constantly
State, when the electricity of accumulated energy flywheel reaches saturated, system sends instruction again, and charge closing switchs, and stops accumulated energy flywheel
Charging, now, accumulated energy flywheel is in holding state, wait to be received electric discharge instruction.
Preferably, accumulated energy flywheel uses PWM controlled rectification when energy storage, farthest reduces the equipment harmonic wave to electrical network
Interference and reactive requirement.
Preferably, when charging terminal 12 gives charging electric vehicle, the monitoring of described energy storage device sends with scheduler module 112
Instruction, makes energy storage device 14 cut off electrical network, utilizes accumulated energy flywheel high-power generator to carry out short to the set of cells 30 of electric automobile
Time repid discharge, meet its demand to quick charge.
Preferably, described charging terminal 12 includes:
Communicator, for communicating with charging service and control module and described charging terminal；
Programmable power supply, for being charged according to control；
Charging inlet, is connected with described programmable power supply, for connecting electric automobile；
Electric quantity metering device, is used for measuring charge capacity.
Described Active Power Filter-APF 13 includes: inductance one L1, inductance two L2, nonlinear load W, PWM converter S, electricity
Hold C, power distribution network respectively with inductance one L1, inductance two L2, the other end of inductance one L1 is connected to nonlinear load W, inductance two L2
The other end connect PWM converter S, PWM converter S is parallel with electric capacity C, and incoming end and the electric capacity C of power distribution network are adopted by voltage
Sample A/D module 1 is connected respectively to instruction current input arithmetical unit and PWM generator input, and voltage is passed through at the two ends of electric capacity C
Sampling A/D module and pi regulator are connected to instruction current input arithmetical unit, and the input of inductance one L1 connects current sample
A/D module is connected to instruction current input arithmetical unit, and the input of PWM converter S is connected to by current sample A/D module
Instruction current outfan arithmetical unit, instruction current outfan arithmetical unit is connected to PWM generator input.
Described harmonic detecting module 111 detects the harmonic component in charging pile 10 in the following way:
By load current ia、ib、icResolve into first-harmonic ia1、ib1、ic1With harmonic wave iak、ibk、ickSum；
In view of three-phase imbalance, by current first harmonics electric current ia1、ib1、ic1It is divided into positive sequence, zero sequence and negative sequence component, the most humorous
Ripple electric current iak、ibk、ickPositive sequence, zero sequence and negative sequence component can also be decomposed into；
Three-phase instantaneous powerDecomposition result above-mentioned steps obtained substitutes into this formula, can obtain:
Wherein I1+、I1-It is respectively fundamental positive sequence and negative sequence component, Ik+、Ik-It is respectively k subharmonic positive sequence and negative phase-sequence is divided
Amount, θ1-It is the initial phase of first-harmonic negative phase-sequence, θk+、θk-It is k subharmonic positive sequence and the initial phase of negative phase-sequence respectively.Above formula harmonic wave frequency
Rate is minimum, and up to 100Hz, through low pass filter (LFP), then the harmonic component in three-phase instantaneous power just can filter off completely, only
Remaining steady-state valueSuch that it is able to the fundamental reactive current obtaining having filtered in load current, negative-sequence current,
Zero-sequence current and harmonic current, leave behind fundamental positive sequence real component, it is to avoid the impact of zero sequence lobe error.
Described Active Power Filter-APF 13 harmonic carcellation in the following way:
System Reactive Power and harmonic wave size of current detected by harmonic detecting module 111, as command signal, become with PWM
The output electric current of stream device compares, and error size obtains one group of PWM ripple compared with the ring width of hysteresis comparator；
PWM ripple is sent to the end that controls of power device and controls the switch of power device, follows idle and harmonic current；
PWM converter will be with idle and harmonic wave size of current is equal, and electric current in opposite direction is injected into power distribution network side, and joins
Idle and the harmonic current comprised in grid side is cancelled out each other, thus reaches to eliminate the idle mesh with harmonic current in power distribution network side
's.
Fig. 2 shows the flow chart of the operation method of a kind of charging pile with energy storage device.This operation method include as
Lower step:
S1. the maximum access power that energy storage device allows with power distribution network from power distribution network draws electric energy by input translator
Until being full of, now energy storage device is in holding state, the electric vehicle rapid charging that can be charged to needs at any time；
S2. when charging pile is to charging electric vehicle, make energy storage device cut off electrical network, utilize accumulated energy flywheel Electricity Generation
Machine carries out repid discharge in short-term to the set of cells of electric automobile, meets its demand to quick charge；
S3. charging pile run duration, detects System Reactive Power and the harmonic wave size of current of charging pile in real time；
S4. according to the idle and harmonic wave size of current detected, carry out reactive-load dynamic compensation and harmonic filtration in real time, ensure
Charging pile safety and economic operation.
Preferably, in step sl, in normal state, energy storage device monitoring detects energy storage device in real time with scheduler module
Energy storage state, according to testing result, at any time energy storage device is carried out between power distribution network and charging terminal switching.
Preferably, described energy storage device includes the first accumulated energy flywheel and the second accumulated energy flywheel, when the first accumulated energy flywheel or
When two accumulated energy flywheels need to be charged, this system sends instruction, opens charge switch, is charged accumulated energy flywheel, and time
Time detection accumulated energy flywheel charged state, when the electricity of accumulated energy flywheel reaches saturated, system sends instruction, charge closing again
Switch, stops the charging to accumulated energy flywheel.Now, accumulated energy flywheel is in holding state, waits electric discharge instruction to be received.
Preferably, in step s 2, accumulated energy flywheel is in discharge process, and flywheel reduction of speed drives electrical power generators, through DC/
DC conversion module, then by the charging terminal set of cells quick charge to electric automobile.
In S3, the detection of harmonic current concretely comprises the following steps:
S31. by load current ia、ib、icResolve into first-harmonic ia1、ib1、ic1With harmonic wave iak、ibk、ickSum；
S32. in view of three-phase imbalance, by current first harmonics electric current ia1、ib1、ic1It is divided into positive sequence, zero sequence and negative sequence component,
Then harmonic current iak、ibk、ickPositive sequence, zero sequence and negative sequence component can also be decomposed into；
S33. three-phase instantaneous powerDecomposition result above-mentioned steps obtained substitutes into this formula, can obtain:
Middle I1+、I1-It is respectively fundamental positive sequence and negative sequence component, Ik+、Ik-It is respectively k subharmonic positive sequence and negative sequence component,
θ1-It is the initial phase of first-harmonic negative phase-sequence, θk+、θk-It is k subharmonic positive sequence and the initial phase of negative phase-sequence respectively.Above formula harmonic frequency
Minimum up to 100Hz, through low pass filter (LFP), then the harmonic component in three-phase instantaneous power just can filter off completely, the most surplus
Lower steady-state valueSuch that it is able to the fundamental reactive current obtaining having filtered in load current, negative-sequence current,
Zero-sequence current and harmonic current, leave behind fundamental positive sequence real component, it is to avoid the impact of zero sequence lobe error.
Preferably, if in view of the situation of three-phase imbalance, then load-side fundamental current can be decomposed into positive sequence, negative phase-sequence
With zero-sequence component ia1、ib1、ic1, then harmonic current can also be decomposed into positive sequence, negative phase-sequence and zero-sequence component iak、ibk、ick, wherein
Three-phase instantaneous power p isThe component of above-mentioned decomposition is substituted into this respectively
Formula, can obtain；
Wherein I1+、I1-、I10It is respectively fundamental positive sequence and negative sequence component, Ik+、Ik-、Ik0Be respectively k subharmonic positive sequence and
Negative sequence component, θ1-It is the initial phase of first-harmonic negative phase-sequence, θk+、θk-It is k subharmonic positive sequence and the initial phase of negative phase-sequence respectively,It is
Power-factor angle.
Preferably, in step s 4, the following reactive-load dynamic compensation method of concrete employing realizes reactive-load dynamic compensation and harmonic wave
Filter:
S41. System Reactive Power and harmonic wave size of current detected by harmonic detecting module, as command signal, become with PWM
The output electric current of stream device compares, and error size obtains one group of PWM ripple compared with the ring width of hysteresis comparator；
S42.PWM ripple is sent to the end that controls of power device and controls the switch of power device, follows idle and harmonic current；
S43.PWM current transformer will be with idle and harmonic wave size of current is equal, and electric current in opposite direction is injected into power distribution network side,
Cancel out each other with the idle and harmonic current comprised in power distribution network side, thus it is idle and harmonic current to reach to eliminate power distribution network side
Purpose.
Above content is to combine concrete preferred implementation further description made for the present invention, it is impossible to assert
Being embodied as of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of present inventive concept, make some equivalents and substitute or obvious modification, and performance or purposes are identical, all should
It is considered as belonging to protection scope of the present invention.
Claims (7)
1. the operation method of a charging pile with energy storage device, it is characterised in that comprise the steps:
S1. energy storage device from power distribution network with power distribution network allow maximum access power by input translator draw electric energy until
Being full of, now energy storage device is in holding state, the electric vehicle rapid charging that can be charged to needs at any time；
S2. when charging pile is to charging electric vehicle, make energy storage device cut off electrical network, utilize accumulated energy flywheel high-power generator pair
The set of cells of electric automobile carries out repid discharge in short-term, meets its demand to quick charge；
S3. charging pile run duration, detects System Reactive Power and the harmonic wave size of current of charging pile in real time；
S4. according to the idle and harmonic wave size of current detected, carry out reactive-load dynamic compensation and harmonic filtration in real time, ensure charging
Stake safety and economic operation.
2. the method for claim 1, it is characterised in that in step sl, in normal state, energy storage device monitoring with
Scheduler module detects the energy storage state of energy storage device in real time, according to testing result, at any time by energy storage device in power distribution network and charging
Switching is carried out between terminal.
3. method as claimed in claim 2, it is characterised in that described energy storage device includes the first accumulated energy flywheel and the second energy storage
Flywheel, when the first accumulated energy flywheel or the second accumulated energy flywheel need to be charged, this system sends instruction, opens charge switch,
Accumulated energy flywheel is charged, and detects the charged state of accumulated energy flywheel constantly, when the electricity of accumulated energy flywheel reaches saturated, be
System sends instruction again, and charge closing switchs, and stops the charging to accumulated energy flywheel.Now, accumulated energy flywheel is in holding state, etc.
Electric discharge instruction to be received.
4. method as claimed in claim 3, it is characterised in that in step s 2, accumulated energy flywheel is in discharge process, and flywheel drops
Speed belt moves electrical power generators, through DC/DC conversion module, is then quickly filled the set of cells of electric automobile by charging terminal
Electricity.
5. method as claimed in claim 4, it is characterised in that in S3, the detection of harmonic current concretely comprises the following steps:
S31. by load current ia、ib、icResolve into first-harmonic ia1、ib1、ic1With harmonic wave iak、ibk、ickSum；
S32. in view of three-phase imbalance, by current first harmonics electric current ia1、ib1、ic1It is divided into positive sequence, zero sequence and negative sequence component, the most humorous
Ripple electric current iak、ibk、ickPositive sequence, zero sequence and negative sequence component can also be decomposed into；
S33. three-phase instantaneous powerDecomposition result above-mentioned steps obtained substitutes into this formula, can obtain:
Middle I1+、I1-It is respectively fundamental positive sequence and negative sequence component, Ik+、Ik-It is respectively k subharmonic positive sequence and negative sequence component, θ1-It is
The initial phase of first-harmonic negative phase-sequence, θk+、θk-It is k subharmonic positive sequence and the initial phase of negative phase-sequence respectively.Above formula harmonic frequency is minimum can
Reaching 100Hz, through low pass filter (LFP), then the harmonic component in three-phase instantaneous power just can filter off completely, the most remaining stable state
ValueSuch that it is able to the fundamental reactive current obtaining having filtered in load current, negative-sequence current, zero sequence electricity
Stream and harmonic current, leave behind fundamental positive sequence real component, it is to avoid the impact of zero sequence lobe error.
6. method as claimed in claim 5, it is characterised in that if in view of the situation of three-phase imbalance, then can will load
Side fundamental current is decomposed into positive sequence, negative phase-sequence and zero-sequence component ia1、ib1、ic1, then harmonic current can also be decomposed into positive sequence, negative phase-sequence
With zero-sequence component iak、ibk、ick, wherein
Three-phase instantaneous power p isThe component of above-mentioned decomposition is substituted into this formula respectively, can
?；
Wherein I1+、I1-、I10It is respectively fundamental positive sequence and negative sequence component, Ik+、Ik-、Ik0It is respectively k subharmonic positive sequence and negative phase-sequence
Component, θ1-It is the initial phase of first-harmonic negative phase-sequence, θk+、θk-It is k subharmonic positive sequence and the initial phase of negative phase-sequence respectively,It is power
Factor angle.
7. method as claimed in claim 6, it is characterised in that in step s 4, the following reactive-load dynamic compensation side of concrete employing
Method realizes reactive-load dynamic compensation and harmonic filtration:
S41. System Reactive Power and harmonic wave size of current are detected by harmonic detecting module, as command signal, with PWM converter
Output electric current compare, error size obtains one group of PWM ripple compared with the ring width of hysteresis comparator；
S42.PWM ripple is sent to the end that controls of power device and controls the switch of power device, follows idle and harmonic current；
S43.PWM current transformer will be with idle and harmonic wave size of current is equal, and electric current in opposite direction is injected into power distribution network side, and joins
Idle and the harmonic current comprised in grid side is cancelled out each other, thus reaches to eliminate the idle mesh with harmonic current in power distribution network side
's.
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