CN106300581A - A kind of monitoring method of the charging pile detecting and filtering harmonic wave - Google Patents
A kind of monitoring method of the charging pile detecting and filtering harmonic wave Download PDFInfo
- Publication number
- CN106300581A CN106300581A CN201610518290.8A CN201610518290A CN106300581A CN 106300581 A CN106300581 A CN 106300581A CN 201610518290 A CN201610518290 A CN 201610518290A CN 106300581 A CN106300581 A CN 106300581A
- Authority
- CN
- China
- Prior art keywords
- current
- sequence
- harmonic
- power
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001914 filtration Methods 0.000 title claims abstract description 16
- 238000012544 monitoring process Methods 0.000 title claims abstract description 10
- 238000009826 distribution Methods 0.000 claims abstract description 25
- 238000000819 phase cycle Methods 0.000 claims description 22
- 230000005611 electricity Effects 0.000 claims description 8
- 238000000354 decomposition reaction Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- 238000005457 optimization Methods 0.000 claims description 3
- 230000006378 damage Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Classifications
-
- H02J7/045—
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of monitoring method of charging pile detecting and filtering harmonic wave, pass through the method, solve 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, in addition, this system is while total reactive power demand of real-Time Compensation charging pile system, the current maximum allowable active power of power distribution network and charging pile can be taken into account, the efficiency of significant increase charging and safety.
Description
Art
The present invention relates to a kind of monitoring method of charging pile detecting and filtering harmonic wave.
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.
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 a kind of monitoring method of charging pile detecting and filtering harmonic wave, passes through
The method, solves the problem that current electric automobile charging pile side harmonics comparision contents is big, and can filter in load current
Fundamental reactive current, negative-sequence current, zero-sequence current and harmonic current, leave behind fundamental positive sequence real component, it is to avoid zero sequence
The impact of lobe error, additionally, this system is while total reactive power demand of real-Time Compensation charging pile system, can take into account
Power distribution network and the current maximum allowable active power of charging pile, the efficiency of significant increase charging and safety.
To achieve these goals, the present invention provides the monitoring side of a kind of charging pile system detecting and filtering harmonic wave
Method, the method comprises the steps:
Detect System Reactive Power and the harmonic wave size of current of charging pile system the most in real time;
S2. according to the System Reactive Power detected and harmonic wave size of current, reactive-load dynamic compensation and harmonic filtration are carried out in real time;
S3. for according to present battery group charged state and power distribution network operational factor, control module formulates suitable filling
Electricity strategy, it is achieved the global optimization of the charging load in charging pile system controls.
In S1, the detection of harmonic current concretely comprises the following steps:
S11. by load current ia、ib、icResolve into first-harmonic ia1、ib1、ic1With harmonic wave iak、ibk、ickSum;
S12. 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;
S13. 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 it is merit
Rate factor angle.
Preferably, in step s 2, the following reactive-load dynamic compensation method of concrete employing realizes reactive-load dynamic compensation and harmonic wave
Filter:
S21. 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;
S22.PWM ripple is sent to the end that controls of power device and controls the switch of power device, follows idle and harmonic current;
S23.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.
In step s3, following steps are specifically included:
S31. charge period scope T is divided into J stage;
S32. in each stage, determine that all electric automobiles load that always charges is:
WhereinExpect with charging electric vehicle load average for regional distribution network conventional load, PbaseFor regional distribution network
Conventional load curve, PEViJ () is i-th car charge power in the jth stage, CiBeing the charge requirement of i-th car, M is electricity
Electrical automobile sum;
S33. the charging mean power of each electric automobile is determined, according to averagely according to all electric automobiles load that always charges
Charge power determines any Vehicular charging probability constant, produces uniform random number, determines arbitrarily with the magnitude relationship of the two
Charging electric vehicle power in the unit charging interval.
Present invention have the advantage that (1) charging pile exports with firm power, start and stop and then control by charging pile are single
Charging electric vehicle quantity in bit time, and make charger always work in energy conversion high efficient area, improve electric automobile
The integral energy utilization rate of charging;(2) by this system, current electric automobile charging pile side harmonics comparision contents is solved big
Problem, and the fundamental reactive current in load current, negative-sequence current, zero-sequence current and harmonic current can be filtered, leave behind
Fundamental positive sequence real component, it is to avoid the impact of zero sequence lobe error.
Accompanying drawing explanation
Fig. 1 shows the block diagram of a kind of charging pile system detecting and filtering harmonic wave of the present invention;
Fig. 2 shows the flow chart of a kind of monitoring method of charging pile detecting and filtering harmonic wave.
Detailed description of the invention
Fig. 1 shows the block diagram of a kind of charging pile system 10 detecting and filtering harmonic wave, and this system 10 includes:
Harmonic detecting module 11, for acrobatic skill and the harmonic wave size of current of detection charging pile system in real time;
Multiple charging piles 12, for being charged the set of cells of multiple electric automobiles, the plurality of charging pile all includes
AC/DC modular converter;
Active Power Filter-APF 13, carries out harmonic filtration, improves charging pile system 10 in real time to charging pile system 10
The power factor (PF) run;
Control module 14, for controlling 10 operations of charging pile system, including controlling above-mentioned each charging pile to set of cells
Charge power, control Active Power Filter-APF charging pile system is carried out harmonic filtration.
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 11 detects the harmonic component in charging pile system 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 is detected, as command signal, with PWM unsteady flow by harmonic detecting module 11
The output electric current of 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.
Described control module 14 includes the equilibrium that controller and the charging pile corresponding with each Rechargeable vehicle set of cells are connected
Device, described controller sends instruction according to the charge information of each set of cells to each equalizer, and each equalizer controls according to instruction
With each charging pile charge power to each Rechargeable vehicle set of cells.
Preferably, described controller includes: time period division unit, electric automobile always charge load determination unit, vehicle
Charging probability constant determines unit, random number generation unit and charging control unit, wherein:
Time period division unit is divided into J stage charge period scope T;
The electric automobile load determination unit that always charges determines that all electric automobiles load that always charges is:
WhereinExpect with charging electric vehicle load average for power distribution network conventional load, PbaseConventional for regional distribution network
Load curve, PEViJ () is i-th car charge power in the jth stage, CiBeing the charge requirement of i-th car, M is electronic vapour
Car sum;
According to all electric automobiles load that always charges, Vehicular charging probability constant determines that the charging of each electric automobile is average
Power, determines any Vehicular charging probability constant according to average charge power;
Random number generation unit produces uniform random number,
Charging control unit determines arbitrarily with the magnitude relationship of any Vehicular charging probability constant Yu random number generation unit
Charging electric vehicle power in the unit charging interval.
Fig. 2 shows the flow chart of a kind of monitoring method of charging pile system detecting and filtering harmonic wave.This monitoring side
Method comprises the steps:
Detect System Reactive Power and the harmonic wave size of current of charging pile system the most in real time;
S2. according to the System Reactive Power detected and harmonic wave size of current, reactive-load dynamic compensation and harmonic filtration are carried out in real time;
S3. for according to present battery group charged state and power distribution network operational factor, control module formulates suitable filling
Electricity strategy, it is achieved the global optimization of the charging load in charging pile system controls.
In S1, the detection of harmonic current concretely comprises the following steps:
S11. by load current ia、ib、icResolve into first-harmonic ia1、ib1、ic1With harmonic wave iak、ibk、ickSum;
S12. 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;
S13. 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 it is merit
Rate factor angle.
Preferably, in step s 2, the following reactive-load dynamic compensation method of concrete employing realizes reactive-load dynamic compensation and harmonic wave
Filter:
S21. 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;
S22.PWM ripple is sent to the end that controls of power device and controls the switch of power device, follows idle and harmonic current;
S23.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.
In step s3, following steps are specifically included:
S31. charge period scope T is divided into J stage;
S32. in each stage, determine that all electric automobiles load that always charges is:
WhereinExpect with charging electric vehicle load average for regional distribution network conventional load, PbaseFor regional distribution network
Conventional load curve, PEViJ () is i-th car charge power in the jth stage, CiBeing the charge requirement of i-th car, M is electricity
Electrical automobile sum;
S33. the charging mean power of each electric automobile is determined, according to averagely according to all electric automobiles load that always charges
Charge power determines any Vehicular charging probability constant, produces uniform random number, determines arbitrarily with the magnitude relationship of the two
Charging electric vehicle power in the unit charging interval.
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 (5)
1. can detect and filter a monitoring method for the charging pile system of harmonic wave, the method comprises the steps:
Detect System Reactive Power and the harmonic wave size of current of charging pile system the most in real time;
S2. according to the System Reactive Power detected and harmonic wave size of current, reactive-load dynamic compensation and harmonic filtration are carried out in real time;
S3. for according to present battery group charged state and power distribution network operational factor, control module formulates suitable charging plan
Slightly, it is achieved the global optimization of the charging load in charging pile system controls.
2. the method for claim 1, it is characterised in that in S1, the detection of harmonic current concretely comprises the following steps:
S11. by load current ia、ib、icResolve into first-harmonic ia1、ib1、ic1With harmonic wave iak、ibk、ickSum;
S12. 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;
S13. 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.
3. method as claimed in claim 2, 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.
4. method as claimed in claim 3, it is characterised in that in step s 2, the following reactive-load dynamic compensation side of concrete employing
Method realizes reactive-load dynamic compensation and harmonic filtration:
S21. 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;
S22.PWM ripple is sent to the end that controls of power device and controls the switch of power device, follows idle and harmonic current;
S23.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.
5. the method for claim 1, it is characterised in that in step s3, specifically includes following steps:
S31. charge period scope T is divided into J stage;
S32. in each stage, determine that all electric automobiles load that always charges is:
WhereinExpect with charging electric vehicle load average for regional distribution network conventional load, PbaseConventional for regional distribution network
Load curve, PEViJ () is i-th car charge power in the jth stage, CiBeing the charge requirement of i-th car, M is electronic vapour
Car sum;
S33. the charging mean power of each electric automobile is determined, according to average charge according to all electric automobiles load that always charges
Power determines any Vehicular charging probability constant, produces uniform random number, determines arbitrary unit with the magnitude relationship of the two
Charging electric vehicle power in charging interval.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610518290.8A CN106300581A (en) | 2016-07-01 | 2016-07-01 | A kind of monitoring method of the charging pile detecting and filtering harmonic wave |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610518290.8A CN106300581A (en) | 2016-07-01 | 2016-07-01 | A kind of monitoring method of the charging pile detecting and filtering harmonic wave |
Publications (1)
Publication Number | Publication Date |
---|---|
CN106300581A true CN106300581A (en) | 2017-01-04 |
Family
ID=57651484
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610518290.8A Pending CN106300581A (en) | 2016-07-01 | 2016-07-01 | A kind of monitoring method of the charging pile detecting and filtering harmonic wave |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106300581A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110783926A (en) * | 2019-11-12 | 2020-02-11 | 国网四川省电力公司泸州供电公司 | Power supply system for new energy electric automobile charging pile |
CN111555254A (en) * | 2020-04-24 | 2020-08-18 | 北京电力自动化设备有限公司 | DC charging pile harmonic compensation control method based on PWM rectification circuit |
CN113675852A (en) * | 2021-08-25 | 2021-11-19 | 安徽信息工程学院 | Harmonic suppression method and system in electric vehicle charging process in grid-connected state |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN203933018U (en) * | 2014-06-24 | 2014-11-05 | 南通华为电力设备有限公司 | A kind of electric automobile grid side harmonic wave is eliminated system |
CN105515003A (en) * | 2015-12-28 | 2016-04-20 | 江苏大学 | Active power filter for detecting harmonic wave and wattless current and detecting method thereof |
CN105576762A (en) * | 2015-11-25 | 2016-05-11 | 北京巨力思创科技有限公司 | Electric automobile charging control method and device |
US20160137075A1 (en) * | 2013-06-28 | 2016-05-19 | Byd Company Limited | Charge control system for electric vehicle and electric vehicle |
-
2016
- 2016-07-01 CN CN201610518290.8A patent/CN106300581A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160137075A1 (en) * | 2013-06-28 | 2016-05-19 | Byd Company Limited | Charge control system for electric vehicle and electric vehicle |
CN203933018U (en) * | 2014-06-24 | 2014-11-05 | 南通华为电力设备有限公司 | A kind of electric automobile grid side harmonic wave is eliminated system |
CN105576762A (en) * | 2015-11-25 | 2016-05-11 | 北京巨力思创科技有限公司 | Electric automobile charging control method and device |
CN105515003A (en) * | 2015-12-28 | 2016-04-20 | 江苏大学 | Active power filter for detecting harmonic wave and wattless current and detecting method thereof |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110783926A (en) * | 2019-11-12 | 2020-02-11 | 国网四川省电力公司泸州供电公司 | Power supply system for new energy electric automobile charging pile |
CN111555254A (en) * | 2020-04-24 | 2020-08-18 | 北京电力自动化设备有限公司 | DC charging pile harmonic compensation control method based on PWM rectification circuit |
CN113675852A (en) * | 2021-08-25 | 2021-11-19 | 安徽信息工程学院 | Harmonic suppression method and system in electric vehicle charging process in grid-connected state |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN106100033A (en) | A kind of charging pile system detecting and filtering harmonic wave | |
Kersten et al. | Battery loss and stress mitigation in a cascaded h-bridge multilevel inverter for vehicle traction applications by filter capacitors | |
CN203933018U (en) | A kind of electric automobile grid side harmonic wave is eliminated system | |
Khan et al. | Analyzing integrated renewable energy and smart-grid systems to improve voltage quality and harmonic distortion losses at electric-vehicle charging stations | |
CN107804326B (en) | Traction motor power supply system and electric locomotive power supply equipment | |
CN101917011B (en) | Power quality comprehensive control method and device for electric railway traction power supply system | |
CN102163856A (en) | Vehicle-to-grid (V2G)-technology-based vehicle-mounted charging and discharging device and control method thereof | |
CN106026279A (en) | Charging pile with energy storage device | |
CN106026278A (en) | Intelligent monitoring method for charging pile system | |
CN106100035A (en) | A kind of Intelligent charging spot system | |
CN106300581A (en) | A kind of monitoring method of the charging pile detecting and filtering harmonic wave | |
CN109217379B (en) | Black start method and application of cascade energy storage system with self-balancing capability | |
CN106230081A (en) | The harmonic detecting of a kind of charging pile and filtering method | |
CN106080245B (en) | A kind of charging pile system for lifting charging quality | |
CN106515474A (en) | Charging system used for electric car | |
CN106100036A (en) | A kind of operation method of the charging pile with energy storage device | |
Wu et al. | Simulation model of three-phase PWM rectifier charging station and harmonic analysis on grid | |
Alobaidi et al. | Impact of vehicle to grid technology on distribution grid with two power line filter approaches | |
CN105978007A (en) | Monitoring apparatus for charging pile having energy storage apparatus | |
CN105978118A (en) | Intelligent charging method for electric vehicles | |
EM et al. | Adaptive hysteresis based multifunctional electric vehicle charger with a single feedback loop controller | |
Chang et al. | Research on Dynamic Behavior of Electric Vehicle Converter in power network fault | |
CN106169763A (en) | A kind of reactive-load compensation method of charging system for electric automobile | |
Cordeiro et al. | A three-phase on-board integrated battery charger for EVS using a drive based on triple inverters | |
Kalichikadu Paramasivam et al. | Unit vector template control strategy‐based harmonic mitigation and charging with three phase–three level–three switch Vienna rectifier for Level 3 electric vehicle charging applications |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170104 |
|
WD01 | Invention patent application deemed withdrawn after publication |