CN106169764A - A kind of charging system for electric automobile with reactive power compensator - Google Patents

A kind of charging system for electric automobile with reactive power compensator Download PDF

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Publication number
CN106169764A
CN106169764A CN201610565813.4A CN201610565813A CN106169764A CN 106169764 A CN106169764 A CN 106169764A CN 201610565813 A CN201610565813 A CN 201610565813A CN 106169764 A CN106169764 A CN 106169764A
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power
reactive
distribution network
charging
power distribution
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靖新宇
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Chengdu Xinweibao Technology Co Ltd
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Chengdu Xinweibao Technology Co Ltd
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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
    • H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
    • 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
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • 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
    • 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
    • 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
    • Y02T10/72—Electric energy management in electromobility

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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)

Abstract

The invention discloses a kind of charging system for electric automobile with reactive power compensator, by this system, after can be to the power distribution network operational parameter detection of charging system, control dynamic passive compensation module the reactive power of power distribution network is compensated, so that the reactive factor of power distribution network reaches the scope that relatively preferable fluctuation is less, in addition, this system is while total reactive power demand of real-Time Compensation charging system, the current maximum allowable active power of power distribution network and charger can be taken into account, the efficiency of significant increase charging and safety.

Description

A kind of charging system for electric automobile with reactive power compensator
Art
The present invention relates to a kind of charging system for electric automobile with reactive power compensator.
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.
Current research and prediction show, the growth of electric automobile load is less, to power distribution network on the impact of electric power total load Impact relatively big, naturally use characteristic because of electric automobile, the charging of its self-assembling formation may be to original distribution network load peak period Cause extra peak of power consumption, the quality of power supply, network loss etc. are made a big impact.Additionally, when a large amount of vehicle charging machine equipments are same During Shi Yunhang, power distribution network is it is possible that the biggest reactive power, and this can reduce electric energy efficiency of transmission.When reactive power deficiency, Distribution network voltage can reduce, and power distribution network can be caused time serious to paralyse.
Concentrate the charge period charging load impact on power distribution network to reduce electric automobile, need charging electric vehicle Process control effectively, and charging system carries out reactive-load compensation in time, improves power factor (PF), promotes charge efficiency, reduces Losses of distribution network.
Under intelligent distribution network background, charging electric vehicle is implemented intelligent management, charging electric vehicle demand can be avoided The adverse effect that power distribution network is caused, and improve the operational efficiency of power distribution network.
Modern reactive power compensation has evolved to IGBT and entirely controls epoch, static reacance generator (STATIC VAR GENERATOR is called for short SVG) it is a kind of New Reactive Power Compensation Device based on modern power electronics technology, have superior dynamic Reactive power compensation performance, it is possible to quickly follow the tracks of and compensate the reactive power of power distribution network, moreover it is possible to realize from perception to capacitive The compensation of gamut reactive power, thus become the focus that various countries are competitively studied.
Summary of the invention
For solving the problems referred to above, the present invention provides a kind of charging system for electric automobile with reactive power compensator, passes through This system, can be to the power distribution network operational parameter detection of charging system after, control idle to power distribution network of dynamic passive compensation module Power compensates, so that the reactive factor of power distribution network reaches the scope that relatively preferable fluctuation is less, additionally, this is System, while total reactive power demand of real-Time Compensation charging system, can be taken into account power distribution network and the current maximum of charger is permitted Permitted active power, the efficiency of significant increase charging and safety.
To achieve these goals, the present invention provides a kind of charging system for electric automobile with reactive power compensator, should System includes:
Power distribution network detection module, for the fortune of the real-time power distribution network detecting and being connected with charging system and power for charging system Line parameter, described operational factor includes power factor (PF)；
Multiple chargers, for being charged the set of cells of multiple electric automobiles, the plurality of charger all includes AC/ DC modular converter；
Dynamic passive compensation module, carries out reactive-load compensation, improves the merit that charging system runs in real time to charging system Rate factor；
Control module, for controlling the operation of charging system, including controlling the charging to set of cells of the above-mentioned each charger Power, controls the reactive-load compensation to charging system of the dynamic passive compensation module.
Preferably, described power distribution network detection module is for detecting the reactive factor in described power distribution network and idle resistance Anti-characteristic, described power distribution network detection module is used for detecting the phase contrast of voltage between uniline electric current and other two phase line, So that it is determined that the reactive impedance characteristic of described power distribution network.
Preferably, in three phase supply, it is assumed that the phase voltage of three-phase is respectively Ua、Ub、Uc, A line current is IaThen there is Ua= Usin (ω t), Ub=Usin (ω t+120 °), Uc=Usin (ω t+240 °), thus obtaining the line voltage between BC is Ubc=Ub- Uc=Usin (ω t-90 °)；
If A linear load is purely resistive, then A line current IaWith A line voltage UaHomophase, IaAdvanced UbcAngle be 90 °；If A line Load is perception, then A line current IaDelayed A line voltage UaAngle isIaAdvanced UbcAngle be If A linear load is capacitive, then A line current IaAdvanced A line voltage UaAngle isIaAdvanced UbcAngle be
Preferably, described dynamic passive compensation module includes several compensating unit, and each described compensating unit is by described control Molding block controls；The reactive power of multiple described compensating units output is incomplete same；Described compensating unit includes:
Current-limiting reactor, is used for exporting lagging reactive power；
Shnt capacitor, is used for exporting capacitive reactive power；
Fling-cut switch, is controlled by described control module, is used for selecting to turn on described serial reactor or shnt capacitor；
Protection device, for protecting described compensating unit；
Described compensating unit is controlled by described control module, and exports capacitive reactive power according to the control of control module.
Preferably, the dynamic passive compensation module that multiple compensating units are constituted can select to appoint according to the control of control module Multiple compensating unit of anticipating carries out reactive-load compensation to power distribution network, to the greatest extent can reduction compensate response time, improve dynamically simultaneously The compensation range of reactive compensation module.
Preferably, described control module includes what controller and the charger corresponding with each Rechargeable vehicle set of cells were connected Equalizer, described controller sends instruction according to the charge information of each set of cells to each equalizer, and each equalizer comes according to instruction Control and each charger 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:
P a l l = Σ j = 1 J Σ i = 1 M P E V i ( j ) = Σ j = 1 J Σ i = 1 M φ - P b a s e ( j ) Σ j = 1 J ( φ - P b a s e ( j ) ) × C i = Σ i = 1 M Σ j = 1 J ( φ - P b a s e ( j ) ) Σ j = 1 J ( φ - P b a s e ( j ) ) × C i = Σ i = 1 M C i ,
Wherein φ is that power distribution network conventional load is expected with charging electric vehicle load average, 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.
The charging system for electric automobile that the present invention provides has the advantage that (1) charger exports with firm power, passes through The start and stop of charger and then control charging electric vehicle quantity in the unit interval, and make charger always work in energy to convert High efficient area, improves the integral energy utilization rate of charging electric vehicle；(2) detect the operational factor of power distribution network in real time, move in real time State compensating reactive power, improves the power factor (PF) that charging system runs, and promotes efficiency.
Accompanying drawing explanation
Fig. 1 shows the block diagram of a kind of charging system for electric automobile with reactive power compensator of the present invention；
Fig. 2 shows the flow chart of a kind of monitoring method of charging system for electric automobile with reactive power compensator.
Detailed description of the invention
Fig. 1 shows the block diagram of a kind of charging system for electric automobile 10 with reactive power compensator, and this system 10 includes:
Power distribution network detection module 11, for detecting the power distribution network 20 being connected with charging system and powering for charging system in real time Operational factor, described operational factor includes power factor (PF)；
Multiple chargers 12, for being charged multiple batteries of electric automobile groups 30, the plurality of charger all includes AC/DC modular converter；
Dynamic passive compensation module 13, carries out reactive-load compensation in real time to charging system 10, improves charging system 10 and transports The power factor (PF) of row；
Control module 14, for controlling the operation of charging system 10, including controlling above-mentioned each charger to set of cells 30 Charge power, control the dynamic passive compensation module 13 reactive-load compensation to charging system 10.
Preferably, described power distribution network detection module 11 is for detecting the reactive factor in described power distribution network 20 and nothing Merit impedance operator, described power distribution network detection module 11 is for detecting the phase of voltage between uniline electric current with other two phase line Potential difference, so that it is determined that the reactive impedance characteristic of described power distribution network 20.
Preferably, in three phase supply, it is assumed that the phase voltage of three-phase is respectively Ua、Ub、Uc, A line current is IaThen there is Ua= Usin (ω t), Ub=Usin (ω t+120 °), Uc=Usin (ω t+240 °), thus obtaining the line voltage between BC is Ubc=Ub- Uc=Usin (ω t-90 °)；
If A linear load is purely resistive, then A line current IaWith A line voltage UaHomophase, IaAdvanced UbcAngle be 90 °；If A line Load is perception, then A line current IaDelayed A line voltage UaAngle isIaAdvanced UbcAngle be If A linear load is capacitive, then A line current IaAdvanced A line voltage UaAngle isIaAdvanced UbcAngle be
Preferably, described dynamic passive compensation module 13 includes several compensating unit, and each described compensating unit is by described Control module 14 controls；The reactive power of multiple described compensating units output is incomplete same；Described compensating unit includes:
Current-limiting reactor, is used for exporting lagging reactive power；
Shnt capacitor, is used for exporting capacitive reactive power；
Fling-cut switch, is controlled by described control module, is used for selecting to turn on described serial reactor or shnt capacitor；
Protection device, for protecting described compensating unit；
Described compensating unit is controlled by described control module, and exports capacitive reactive power according to the control of control module.
Preferably, the dynamic passive compensation module that multiple compensating units are constituted can select to appoint according to the control of control module Multiple compensating unit of anticipating carries out reactive-load compensation to power distribution network, to the greatest extent can reduction compensate response time, improve dynamically simultaneously The compensation range of reactive compensation module.
Preferably, described control module 14 includes that controller and the charger corresponding with each Rechargeable vehicle set of cells are connected Equalizer, described controller sends instruction according to the charge information of each set of cells to each equalizer, and each equalizer is according to instruction Control and each charger 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:
P a l l = Σ j = 1 J Σ i = 1 M P E V i ( j ) = Σ j = 1 J Σ i = 1 M φ - P b a s e ( j ) Σ j = 1 J ( φ - P b a s e ( j ) ) × C i = Σ i = 1 M Σ j = 1 J ( φ - P b a s e ( j ) ) Σ j = 1 J ( φ - P b a s e ( j ) ) × C i = Σ i = 1 M C i ,
Wherein φ is that power distribution network conventional load is expected with charging electric vehicle load average, 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 system for electric automobile with reactive power compensator.Should Monitoring method comprises the steps:
It is detected as the power distribution network operational factor that charging system is powered the most in real time, each electric automobile electricity of detection charging in real time The charged state of pond group；
S2. according to the power distribution network operational factor detected, reactive-load dynamic compensation is 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 system controls.
In S1, power distribution network operational factor includes: the power factor (PF) of power distribution network and charging system junction point, power distribution network with fill The voltage and current information of electricity system junction point, and flow of power situation.
In S2, concrete following reactive-load dynamic compensation method is used to realize dynamic passive compensation:
S21. parameter preset, default parameter includes the interval and idle stable region of idle adjustment, described idle adjustment district Between for described reactive-load dynamic compensation method be adjusted time reactive factor fluctuation range, described idle stable region is institute State the reactive factor scope residing for power distribution network after reactive-load compensation method adjusts.
In the power distribution network reactive power that the reactive-load dynamic compensation method of the present invention mainly will be in idle adjustment interval Factor adjusts to described idle stable region, and this is idle, and the least of stable region illustrates that the effect of adjustment is the best.
S22. acquisition power distribution network reactive factor and reactive impedance characteristic:
In this step, in being in constantly changing due to power distribution network, the reactive factor of power distribution network is also fluctuation , the reactive power that power distribution network is current can only be compensated by this reactive-load dynamic compensation method, then is currently needed for the nothing compensated Merit power is accomplished by calculating according to the reactive factor in current power distribution network.
S23. the model of the interval or idle stable region of described idle adjustment it is according to described power distribution network reactive factor Enclose and described reactive impedance characteristic, control the switching action of dynamic passive compensation module, so that the reactive power in power distribution network Factor is in described idle stable region, and keeps switching action certain time.
In this step, when the reactive factor of power distribution network is in idle stable region, described dynamic passive compensation mould Block and/or dynamic reactive generation module do not make switching action, now the reactive factor of power distribution network is in perfect condition, Fluctuation range is minimum；When the reactive factor of power distribution network adjusts in interval, according to reactive impedance characteristic, by dynamic nothing idle Merit compensating module makes switching compensatory movement.
S24. repeated execution of steps S21 and step S23:
When power distribution network detection module enters the week after date of detection next time, it is thus achieved that the reactive factor after power distribution network change, And reactive impedance characteristic, and again the reactive power of power distribution network is compensated, so that at the reactive factor of power distribution network In idle stable region, subsequently into detection and compensation cycle next time.
Described step S23 is by including step by step, and concrete includes:
Step S231: judge described power distribution network reactive factor whether in described idle stable region, if holding Row step S2310.
Step S2310: perform step S24, i.e. carries out the next detection to power distribution network and reactive-load compensation cycle.
If step S231 is judged as NO, the power distribution network reactive factor i.e. detected does not has in idle stable region, Then need to carry out further reactive-load compensation, now perform step S232.
Step S232 is: judge that the reactive impedance characteristic of described power distribution network is capacitive or perception.In the present embodiment, More targetedly power distribution network can be compensated after having carried out the judgement of step S232, compensate response time shorter, can So that the reactive factor undulated control of power distribution network is in minimum scope.
If the reactive impedance characteristic of power distribution network is capacitive after the judgement of step S232, then performs step S233, i.e. excise The capacitive reactive power output of described dynamic passive compensation module, makes described power distribution network be in idle stable region, performs Step S24, enters the next compensation cycle cycle.If the capacitive reactive power in dynamic reactive generation module exports minimum Time, power distribution network does not still enter in described idle stable region, then illustrate that the capacitive reactive power of now power distribution network is relatively big, only The capacitive reactive power only compensated by reducing the capacitive reactive power of dynamic passive compensation module compensates and power distribution network still cannot be made to be returned to Idle stable region, is now accomplished by increasing the lagging reactive power output of described dynamic reactive generation module, makes described distribution Net is in idle stable region, then performs step S24, enters next one detection, compensation cycle.Even if if dynamic reactive Occurring module to output the maximum reactive power of perception, power distribution network does not still enter into idle stable region, then illustrate to join The capacitive reactive power of electrical network has had been above the scope that the reactive-load compensation method of the present invention can adjust, for abnormality.
If judging that in step S232 the reactive impedance characteristic of power distribution network as perceptual, then needs to perform step S234: subtract The lagging reactive power output of little described dynamic reactive generation module, makes described power distribution network be in idle stable region, performs Step S24, enters next one detection and compensation cycle；When the lagging reactive power of described dynamic reactive generation module exports minimum Time, described power distribution network does not still enter in described idle stable region, then the lagging reactive power of now power distribution network is described relatively Greatly, power distribution network still cannot be made to be returned to idle stable region only by minimum inductive reactive power compensation, now be accomplished by performing Step S236；Described step S236 is to increase the capacitive reactive power output of described dynamic reactive generation module, makes described distribution Net is in idle stable region, then performs step S24, enters next one detection and reactive-load compensation circulation；Same, if After input dynamic passive compensation module outputs maximum capacitive reactive power, power distribution network is still idle stable again without entering In interval, then illustrate that the lagging reactive power of power distribution network has had been above the model that the reactive-load compensation method of the present invention can adjust Enclose, for abnormality.
In above-mentioned steps S233 and step S234, preferential selects to change the output nothing of described dynamic reactive generation module Merit power, because dynamic reactive generation module is swift in response, can shorten compensation response time.
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:
P a l l = Σ j = 1 J Σ i = 1 M P E V i ( j ) = Σ j = 1 J Σ i = 1 M φ - P b a s e ( j ) Σ j = 1 J ( φ - P b a s e ( j ) ) × C i = Σ i = 1 M Σ j = 1 J ( φ - P b a s e ( j ) ) Σ j = 1 J ( φ - P b a s e ( j ) ) × C i = Σ i = 1 M C i ,
Wherein φ is that regional distribution network conventional load is expected with charging electric vehicle load average, 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 (7)

1. having a charging system for electric automobile for reactive power compensator, this system includes:
Power distribution network detection module, for the operation ginseng of the real-time power distribution network detecting and being connected with charging system and power for charging system Number, described operational factor includes power factor (PF)；
Multiple chargers, for being charged the set of cells of multiple electric automobiles, the plurality of charger all includes that AC/DC turns Die change block；
Dynamic passive compensation module, carries out reactive-load compensation in real time to charging system, improve power that charging system runs because of Element；
Control module, for controlling the operation of charging system, including controlling the above-mentioned each charger charge power to set of cells, Control the reactive-load compensation to charging system of the dynamic passive compensation module.
2. the system as claimed in claim 1, it is characterised in that described power distribution network detection module is used for detecting in described power distribution network Reactive factor and reactive impedance characteristic, described power distribution network detection module is used for detecting uniline electric current and other two The phase contrast of voltage between phase line, so that it is determined that the reactive impedance characteristic of described power distribution network.
3. system as claimed in claim 2, it is characterised in that determine reactive impedance characteristic in the following way:
In three phase supply, it is assumed that the phase voltage of three-phase is respectively Ua、Ub、Uc, A line current is IaThen there is Ua=Usin (ω t), Ub =Usin (ω t+120 °), Uc=Usin (ω t+240 °), thus obtaining the line voltage between BC is Ubc=Ub-Uc=Usin (ω t- 90°)；
If A linear load is purely resistive, then A line current IaWith A line voltage UaHomophase, IaAdvanced UbcAngle be 90 °；If A linear load For perception, then A line current IaDelayed A line voltage UaAngle isIaAdvanced UbcAngle beIf A Linear load is capacitive, then A line current IaAdvanced A line voltage UaAngle isIaAdvanced UbcAngle be
4. system as claimed in claim 3, it is characterised in that described dynamic passive compensation module includes several compensating unit, Each described compensating unit is controlled by described control module；The reactive power of multiple described compensating units output is incomplete same； Described compensating unit includes:
Current-limiting reactor, is used for exporting lagging reactive power；
Shnt capacitor, is used for exporting capacitive reactive power；
Fling-cut switch, is controlled by described control module, is used for selecting to turn on described serial reactor or shnt capacitor；
Protection device, for protecting described compensating unit；
Described compensating unit is controlled by described control module, and exports capacitive reactive power according to the control of control module.
5. system as claimed in claim 4, it is characterised in that the dynamic passive compensation module that multiple compensating units are constituted is permissible According to control module control select any number of compensating unit that power distribution network carries out reactive-load compensation, to the greatest extent can reduction mend Repay response time, improve the compensation range of dynamic passive compensation module simultaneously.
6. system as claimed in claim 5, it is characterised in that described control module include controller and with each Rechargeable vehicle The equalizer that charger corresponding to set of cells is connected, each equalizer is sent by described controller according to the charge information of each set of cells Instruction, each equalizer controls and each charger charge power to each Rechargeable vehicle set of cells according to instruction.
7. system as claimed in claim 6, it is characterised in that described controller includes: time period division unit, electric automobile Always charge load determination unit, Vehicular charging probability constant determines unit, random number generation unit and charging control unit, its In:
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:
P a l l = Σ j = 1 J Σ i = 1 M P E V i ( j ) = Σ j = 1 J Σ i = 1 M φ - P b a s e ( j ) Σ j = 1 J ( φ - P b a s e ( j ) ) × C i = Σ i = 1 M Σ j = 1 J ( φ - P b a s e ( j ) ) Σ j = 1 J ( φ - P b a s e ( j ) ) × C i = Σ i = 1 M C i ,
Wherein φ is that power distribution network conventional load is expected with charging electric vehicle load average, 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 that electric automobile is total Number；
Vehicular charging probability constant determines the charging mean power of each electric automobile according to all electric automobiles load that always charges, Any Vehicular charging probability constant is determined according to average charge power；
Random number generation unit produces uniform random number, charging control unit with any Vehicular charging probability constant with random The magnitude relationship of number signal generating unit determines the charging electric vehicle power in the arbitrary unit charging interval.
CN201610565813.4A 2016-07-18 2016-07-18 A kind of charging system for electric automobile with reactive power compensator Pending CN106169764A (en)

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CN110783991A (en) * 2019-11-11 2020-02-11 阳光电源股份有限公司 Direct current charging system and control method thereof
CN110797882A (en) * 2019-11-11 2020-02-14 阳光电源股份有限公司 Direct current charging station and control method thereof

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CN104092272A (en) * 2014-07-24 2014-10-08 四川慧盈科技有限责任公司 Optimal configuration method of electric automobile charging system and power distribution network
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
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CN104092272A (en) * 2014-07-24 2014-10-08 四川慧盈科技有限责任公司 Optimal configuration method of electric automobile charging system and power distribution network
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CN110783991A (en) * 2019-11-11 2020-02-11 阳光电源股份有限公司 Direct current charging system and control method thereof
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