CN109510250A - Charging station, charging pile system and control method with power grid ancillary service function - Google Patents

Charging station, charging pile system and control method with power grid ancillary service function Download PDF

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Publication number
CN109510250A
CN109510250A CN201811553285.6A CN201811553285A CN109510250A CN 109510250 A CN109510250 A CN 109510250A CN 201811553285 A CN201811553285 A CN 201811553285A CN 109510250 A CN109510250 A CN 109510250A
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China
Prior art keywords
power
charging pile
charging station
charging
retired
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CN201811553285.6A
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Chinese (zh)
Inventor
梁立中
陈冲
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Beijing Nenggative High Automation Technology Co., Ltd.
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Clean Electric (beijing) Energy Storage Technology Co Ltd
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Priority to CN201811553285.6A priority Critical patent/CN109510250A/en
Publication of CN109510250A publication Critical patent/CN109510250A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/48Controlling the sharing of the in-phase component
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/50Controlling the sharing of the out-of-phase component
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04Regulation of charging current or voltage
    • H02J7/06Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • H02J2007/10
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/12Electric charging stations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The present invention discloses a kind of charging station with power grid ancillary service function, charging pile system and control method, the charging station includes the charging pile system of N number of parallel connection, the charging pile system includes charging pile, and the retired power battery energy-storage units being connected with charging pile, wherein, the retired power battery energy-storage units include several retired power batteries in parallel, the retired power battery is controlled by intelligent toggle switch, retired power battery energy-storage units and charging pile real-time communication, and carry out energy exchange.The control method includes power grid ancillary service rate-determining steps and charge control step.Charging station of the present invention can recycle retired power battery on the spot, and the application cost that retired battery echelon utilizes is greatly lowered, and improve utilization efficiency;The ancillary services such as peak regulation, frequency modulation, pressure regulation can be provided for power grid simultaneously, extend the function of charging station, realize the integrated setting and function integration of charging station and energy-accumulating power station.

Description

Charging station, charging pile system and control method with power grid ancillary service function
Technical field
The present invention relates to a kind of charging station with power grid ancillary service function, charging pile system and control methods, belong to Electrical network field.
Background technique
In recent years, it constantly brought forth new ideas as national policy is motivated with technology, China New-energy electric vehicle increasing number, The first in the world is leapt to, demand of the new energy power vehicle to charging pile is also increasing, but charging pile utilization rate is lower at present, is full of Sharp mode is single.And due to chemical cell technical characteristic, with the increase of battery charging and discharging cycle-index, battery capacity can be by Degradation subtracts, new according to relevant national standard when the capacity attenuation of new-energy automobile power battery is 80% or less rated capacity Energy source and power automobile scraps pressure, and retired battery need to be recycled by battery producer/auto vendor, arrives the year two thousand twenty China There to be the retired power battery of high-volume.
Annual retired power battery quantity is very big and type is many and diverse, due to different battery producer manufacturing process and standard It is different, cause battery producer/auto vendor that need to carry out careful classification when recycling retired power battery, seriously restricts its recycling effect Rate, and retired battery recycling transportation range is longer, its cost recovery is caused to greatly increase;Limitation and battery due to battery types The difference of voltage, capacity and communications protocol, the direct echelon for seriously restricting retired power battery utilize, it is necessary to by retired power electric Pond is disassembled, is detected, is recombinated, and technique and processing technique are complicated, and the processing cost is high for battery recycling.It is retired after dismantling recombination The utility value of the general residue 20%~80% of battery, generallys use multiple groups connection, centralized arrangement mode at present, leads to system one Secondary device is various, repeats to configure, and battery also easily " wooden pail effect " occurs, and control system is multiple, and radiating treatment technology difficulty is high, Miscellaneous, security reliability needs to be investigated, while occupied area is larger, and the construction time is longer, and retired power battery echelon utilizes cost It is very big.
In addition, after with the uncontrollable new energy large-scale grid connection of the power output such as wind-powered electricity generation, photovoltaic, China's peak load regulation network frequency modulation pressure Power aggravation, peak-frequency regulation vacancy is serious, and grid stability, safety and reliability have to be optimized, and power quality needs to be administered, and abandons Wind, the abandoning higher phenomenon of light rate have to be solved.Power grid builds concentrated energy storage using ferric phosphate lithium cell, flow battery etc. at present Power station solves the above problems, but construction investment cost is very high, does not have business profit model, can not carry out large-scale promotion.
In view of this, the present inventor studies this, a kind of filling with power grid ancillary service function is specially developed Thus power station, charging pile system and control method, this case generate.
Summary of the invention
The object of the present invention is to provide a kind of charging station with power grid ancillary service function, charging pile system and controlling parties Method can be improved retired power battery utilization efficiency, while can provide the ancillary services such as peak regulation, frequency modulation, pressure regulation for power grid, and extension is filled Power station function.
To achieve the goals above, solution of the invention is:
A kind of charging pile system, including charging pile, and the retired power battery energy-storage units being connected with charging pile, In, the retired power battery energy-storage units include several retired power batteries in parallel, and the retired power battery passes through Intelligent toggle switch control, retired power battery energy-storage units and charging pile real-time communication, and carry out energy exchange.
Preferably, the charging pile includes n AC/DC module in parallel, the AC/DC module is by the three of distribution bus Alternating voltage through over commutation circuit and booster circuit is become steady dc voltage after being filtered by phase alternating current stream, by pushing away Exempt from circuit to realize with the Power Exchange of corresponding retired power battery energy-storage units, completes power grid ancillary service, and meet and fill Charge carrier charge requirement.
Preferably, the charging pile is equipped with the standard being connected respectively with retired power battery energy-storage units, charge carrier Interface.
Every charging pile system is according to the power instruction received, and Coordination Equilibrium distribution power is to n AC/DC mould in parallel Block realizes balanced discharge/charging of retired power battery energy-storage units.Intelligence in each retired power battery energy-storage units is cut It changes switch and is connected according to instruction with one of them retired power battery, realized by AC/DC module and interacted with the power of power grid, when When the retired power battery is unsatisfactory for requiring, intelligent toggle switch automatically switches connection path, with some other retired power electric Pond connection.
Charging station with power grid ancillary service function, the charging pile system including N number of parallel connection, the charging pile system packet Charging pile is included, and the retired power battery energy-storage units being connected with charging pile, wherein the retired power battery energy-storage units Including several retired power batteries in parallel, the retired power battery is controlled by intelligent toggle switch, retired power electric Pond energy-storage units and charging pile real-time communication, and carry out energy exchange.
Preferably, the charging pile includes n AC/DC module in parallel, the AC/DC module is by the three of distribution bus Alternating voltage through over commutation circuit and booster circuit is become steady dc voltage after being filtered by phase alternating current stream, by pushing away Exempt from circuit to realize with the Power Exchange of corresponding retired power battery energy-storage units, completes power grid ancillary service, and meet and fill Charge carrier charge requirement.
Preferably, the charging pile is equipped with the standard being connected respectively with retired power battery energy-storage units, charge carrier Interface.
Charging station control method with power grid ancillary service function, including power grid ancillary service rate-determining steps and charging control Step processed, wherein the power grid ancillary service rate-determining steps include at least following one mode:
Peak load regulation network mode: after receiving the peak regulation instruction that dispatching of power netwoks is assigned, charging station is coordinated to divide according to power information Peak regulation power with each charging pile system;
Power grid frequency modulation mode: after receiving the frequency modulation instruction that dispatching of power netwoks is assigned, charging station is coordinated to divide according to power information Frequency modulation power with each charging pile system;
Power grid voltage regulating mode: after receiving the pressure regulation instruction that dispatching of power netwoks is assigned, charging station is coordinated to divide according to power information Pressure regulation reactive power with each charging pile system.
Preferably, the peak load regulation network mode specifically:
Work as PEnergy storage is used≥PPeak regulation needs (1)
In formula: PEnergy storage is usedFor each charging pile system in charging station remove retired power battery because SOC is unsatisfactory for, equipment therefore The active power summation that barrier, automobile charge power reason can be provided to network system;PPeak regulation needsIt is active needed for peak load regulation network Power.
At this point, n charging pile system in parallel concentrates power output in charging station, meet peak load regulation network power demand, charging station To network system inject active power be with reactive power
In formula: PCharging pile 1~PCharging pile nFor 1~n of charging pile system active power can be exchanged with network system;PEnergy storageFor charging Stake 1~n of system can exchange active power summation with network system;QCharging station needsFor charging station reactive power demand.
Work as PEnergy storage is used< PPeak regulation needs (3)
At this point, in charging station each charging pile to network system provide active power maximum value, and with other machines of power grid Group cooperation, meets peak load regulation network power demand, the active power that charging station specifically injects is with reactive power
In formula: Pcdz1max~Pcdz1maxThe active power maximum value that can be provided for each charging pile;PEnergy storage maxIt is filled for each The active power maximum value summation that electric stake can be provided;PPower grid unitFor other units of power grid issue active power to realize power grid The demand of peak regulation power.
Preferably, the power grid frequency modulation mode specifically:
Work as PEnergy storage is used≥PFrequency modulation needs (5)
At this point, n charging pile system in parallel concentrates power output in charging station, meet power grid frequency modulation power demand, charging station To network system inject active power be with reactive power
In formula: PPeak regulation needsFor active power needed for peak load regulation network.
Work as PEnergy storage is used< PFrequency modulation needs (7)
At this point, each charging pile to system provides the maximum value of active power in charging station, and other machines are assembled with power grid It closes, meets power grid frequency modulation power demand, the active power that charging station specifically injects is with reactive power
Preferably, the power grid voltage regulating mode specifically:
Work as QEnergy storage is used≥QPressure regulation needs (9)
In formula: QEnergy storage is usedReactive power reason needed for removing equipment fault, charging station for each charging pile system in charging station The reactive power summation that can be provided to system;QPeak regulation needsFor reactive power needed for power grid voltage regulating.
At this point, the reactive power of n charged in parallel stake system concentrates sending in charging station, meet power grid voltage regulating and charging station Reactive requirement, each charging pile system and network re-active power are exchanged for 0 in charging station, and electric car charge power is by retired electricity Pond energy-storage units meet, and charging station is specifically to the reactive power that network system is injected
In formula: QCharging pile 1~QCharging pile nBy 1~n of charging pile system energy sending/absorption reactive power;QEnergy storageFor charging pile system Uniting 1~n institute can sending/absorbing reactive power summation;QPressure regulation needsFor reactive power needed for power grid voltage regulating.
Work as QEnergy storage is used< QPressure regulation needs (11)
At this point, each charging pile system issues reactive power maximum value in charging station, meets charging station reactive requirement, pass through Meet system pressure regulating reactive power demand with the cooperation of power grid unit, each charging pile system and network re-active power are handed in charging station It is changed to 0, electric car charge power is met by retired battery energy storage unit, and charging station is specifically to the reactive power that system is injected
In formula: QCharging pile 1max~QCharging pile nmaxBy 1~n of charging pile system energy sending/absorption reactive power maximum value; QEnergy storage maxBy 1~n of charging pile system energy sending/absorbing reactive power maximum value summation.
Preferably, the charge control step, specifically:
When power grid provides electric energy (13)
Power grid meets charge carrier charge power demand at this time, and retired battery energy storage unit is not contributed, and only meets charging station Reactive power demand, specific value are
In formula: Pcn1~PcnnPower is provided for the retired power battery energy-storage units in 1~n of charging pile system;Pqc1~ PqcnFor the charge carrier power demand in 1~n of charging pile system;PgThe active power provided for power grid.
Work as satisfaction
Power grid does not provide electric energy (15)
The retired battery energy storage unit power output in 1~n of charging pile system meets electric vehicle charge power demand, power grid at this time Power is not provided, specific value is
In formula: Pqc1~PqcnWith Pcn1~PcnnIt corresponds, i.e., (P when in such as charging pile system m without charge carrier chargingqcm =0), the retired power battery energy-storage units in the charging pile system are not also contributed (Pcnm=0).
Charging pile of the present invention has the standard interface for connecting retired power battery energy-storage units, charge carrier, can It realizes " plug and play " of retired power battery, retired power battery dispersed placement can be not necessarily to beside each charging pile on the spot Retired power battery is subjected to classification of type, the disadvantage that the existing retired power recovery time is long, transportation cost is high is overcome, breaks through Retired battery types different limitations;It is multiple in series and parallel that battery when retired power battery concentrates echelon to utilize is also overcomed simultaneously Miscellaneous, one secondary device of system repetition is configured, control system complexity height, system heat treatment hardly possible, is taken up a large area, the construction time is long The disadvantages of.The charging pile system through the invention, retired power battery can whole packet utilization, without being disassembled, being detected, again The complicated processes such as group, overcome the inconsistent restrictions such as retired power battery type, capacity, voltage, communications protocol completely, open Retired power battery whole new set of applications scene.
Charging station and control method of the present invention with power grid ancillary service function, simultaneously by more charging pile systems Joint control system (i.e. multiple pc S is in parallel), concentrates power output, and effective and reasonable ground echelon utilizes the retired power battery surplus value, makes to charge It stands tool and power grid interaction function (similar V2G function), provides the ancillary services such as peak regulation, frequency modulation, pressure regulation for power grid, be worth to extend and fill The function in power station realizes that the integrated setting of charging station and energy-accumulating power station and function integrate (unification of two stations), and set of system has Two kinds of functions, overcome the disadvantage that charging pile utilization rate is low in existing charging station.
Charging station of the present invention makes charging station by way of retired power battery " dispersed placement, centralized control " Have peak-frequency regulation function, increase peak load regulation network frequency modulation power amount, alleviate peak load regulation network frequency modulation pressure, is wind-powered electricity generation, light The consumption of the new energy such as volt provides support, overcomes and builds concentrated energy-accumulating power station construction investment by lithium battery, flow battery etc. The disadvantages of excessively high.
Below in conjunction with drawings and the specific embodiments, the invention will be described in further detail.
Detailed description of the invention
Fig. 1 is that the charging station with power grid ancillary service function of the present embodiment is electrically connected schematic diagram one;
Fig. 2 is that the charging station with power grid ancillary service function of the present embodiment is electrically connected schematic diagram two;
Fig. 3 is electrical system connection and the signal transmission communication situation map of the charging station of the present embodiment;
Fig. 4 is the charging station control method flow chart of the present embodiment.
Specific embodiment
As shown in Figs. 1-2, a kind of charging pile system can be applied to the charging station with power grid ancillary service function, including Charging pile 1, and the retired power battery energy-storage units 2 being connected with charging pile 1.N parallel connection is equipped with inside separate unit charging pile 1 AC/DC module 11, n >=1, for the number of the AC/DC module 11 depending on the power that charging pile 1 provides, Fig. 1 is charging pile 1 When inside is an AC/DC module 11, the connection schematic diagram of AC/DC module 11 and a retired power battery energy-storage units 2; Fig. 2 is AC/DC module 11 and multiple retired power battery energy-storage units 2 when having multiple AC/DC modules 11 inside platform charging pile 1 Connection schematic diagram;One AC/DC module 11 battery energy storage unit 2 generally corresponding with one is connected, but can also be according to reality One AC/DC module 11 is connected 2 or more battery energy storage units 2 by border condition simultaneously.Each AC/DC module 11 be by Alternating voltage by uncontrollable rectifier and booster circuit is become stable straight after being filtered by the three-phase alternating current of distribution bus Galvanic electricity pressure exempts from the power friendship of circuit (realizing DC-DC boosting) realization and corresponding retired power battery energy-storage units 2 by pushing away It changes, completes power grid ancillary service, and meet charge carrier 3 (such as electric car) charge requirement.The AC/DC of each charging pile Module 11 is designed with standard interface 12, and the standard interface 12 had both included retired 2 connector of power battery energy-storage units, also includes Charge carrier 3 (such as electric car) charging interface.
The retired power battery energy-storage units 2 include several retired power batteries 21 in parallel, the retired electric power Battery 21 is controlled by intelligent toggle switch 22, and intelligent toggle switch 22 connects one of them retired power battery according to instruction 21, then interacted by the realization of AC/DC module 11 with the power of power grid, when the retired power battery 21 is unsatisfactory for requiring, intelligence Switch switch 22 and automatically switch connection path, is connected to some other retired power battery 21.
As shown in Fig. 2, separate unit charging pile 1 described in the present embodiment is according to the power instruction received, Coordination Equilibrium distribution Power to n AC/DC module 11 in parallel, realize 1~n of retired power battery energy-storage units balanced discharge/charging (at this point, The retired battery of n platform parallel connection only has a retired power battery 21 charge/put in each retired power battery energy-storage units Electricity, which specific platform battery charging and discharging depend on each battery status).
Charging station with power grid ancillary service function, including n charging pile system in parallel, the charging pile system is such as Upper described, details are not described herein again.I in Fig. 2a1、ib1、ic1For the alternating current for flowing into first AC/DC module 11;ian、 ibn、icnFor the alternating current for flowing into n-th of AC/DC module 11;Imdc1、ImdcnRespectively first AC/DC module 11 and n-th AC/DC module 11 flows into the DC current of DC bus;UzlFor DC bus-bar voltage;IddcTo flow into the straight of automobile power cell Galvanic electricity stream;Itydc1~ItydcnFor the electric current for flowing into/flowing out 1~n of retired power battery energy-storage units;Itydc11~Itydc1nIt is The charge/discharge current of the retired power battery 21 of 1~n in one retired power battery energy-storage units 2;Itydcn1~ItydcnnIt is The charge/discharge current of the retired power battery 21 of 1~n in n retired power battery energy-storage units 2;Iddc1~IddcnIt is 1~n The charging current of charge carrier 3;D1~D9For diode, VT1~VT3For IGBT pipe, L1~L2For inductance, C1~C2For pressure stabilizing electricity Hold.
Charging station working principle with power grid ancillary service function, as shown in figure 3, n charging pile system in parallel with The distribution bus of 0.4kV connects, and boosting after transformer by 0.4kV voltage is 10/35kV, and is connected with external electrical network.It moves back Labour power battery energy-storage units 2 are arranged in 1 side of charging pile on the spot, and carry out real-time communication, realization and charging pile with charging pile 1 The exchange of energy;It when batteries of electric automobile 3 needs to charge, is communicated, is closed the switch with charging pile 1, charging pile is automobile Electric energy is provided, at the end of charging, disconnects switch.The power instruction that charging station can also be assigned according to dispatching of power netwoks is coordinated N charging pile system in parallel of control realizes that n charging pile system in parallel concentrates power output, meets power grid ancillary service power Demand.
P in Fig. 3cdz1、PcdznWith Qcdz1、QcdznMatch for 1~n of the charging pile system and 0.4kV with ancillary service function The active power and reactive power of goddess of lightning's line exchange;Pcn1、PcnnFor retired power battery energy-storage units 2 and respective charging pile 1 Exchange power;Pqc1、PqcnIt is the charge power that electric car provides for charging pile 1;Pg、QgRespectively power grid is exchanged with charging station Active power and reactive power (peak load regulation network active power (P i.e. described belowPeak regulation needs), frequency modulation need active power (PPeak regulation needs) with pressure regulation needed for reactive power (PPressure regulation needs))。
Charging station control method with power grid ancillary service function, as shown in figure 4, including the ancillary service of charging station power grid Rate-determining steps and charging station are the rate-determining steps of charge carrier charging, wherein the power grid ancillary service rate-determining steps at least wrap Include following one mode:
Peak load regulation network mode: after receiving the peak regulation instruction that dispatching of power netwoks is assigned, charging pile system is assisted according to power information Adjust distribution peak regulation power;
Power grid frequency modulation mode: after receiving the frequency modulation instruction that dispatching of power netwoks is assigned, charging pile system is assisted according to power information Adjust distribution frequency modulation power;
Power grid voltage regulating mode: after receiving the pressure regulation instruction that dispatching of power netwoks is assigned, charging pile system is assisted according to power information Adjust distribution pressure regulation reactive power.
Wherein, the peak load regulation network mode specifically:
Work as PEnergy storage is used≥PPeak regulation needs (1)
In formula: PEnergy storage is usedFor each charging pile system in charging station remove retired power battery because SOC is unsatisfactory for, equipment therefore The active power summation that the reasons such as barrier, automobile charge power can be provided to network system;PPeak regulation needsTo have needed for peak load regulation network Function power (i.e. P in Fig. 2g)。
At this point, n charging pile system in parallel concentrates power output in charging station, meet peak load regulation network power demand.Charging station To network system inject active power be with reactive power
In formula: PCharging pile 1~PCharging pile nFor 1~n of charging pile system active power can be exchanged with network system;PEnergy storageFor charging Stake 1~n of system can exchange active power summation with network system;QCharging station needsFor charging station reactive power demand.
Work as PEnergy storage is used< PPeak regulation needs (3)
At this point, in charging station each charging pile to network system provide active power maximum value, and with other machines of power grid Group cooperation, meets peak load regulation network power demand.The active power that charging station specifically injects is with reactive power
In formula: Pcdz1max~Pcdz1maxThe active power maximum value that can be provided for each charging pile;PEnergy storage maxIt is filled for each The active power maximum value summation that electric stake can be provided;PPower grid unitFor other units of power grid issue active power to realize power grid The demand of peak regulation power.
The power grid frequency modulation mode specifically:
Work as PEnergy storage is used≥PFrequency modulation needs (5)
At this point, n charging pile system in parallel concentrates power output in charging station, meet power grid frequency modulation power demand.Charging station To network system inject active power be with reactive power
In formula: PPeak regulation needsFor (the i.e. P in Fig. 2 of active power needed for peak load regulation networkg)。
Work as PEnergy storage is used< PFrequency modulation needs (7)
At this point, each charging pile to system provides the maximum value of active power in charging station, and other machines are assembled with power grid It closes, meets power grid frequency modulation power demand.The active power that charging station specifically injects is with reactive power
The power grid voltage regulating mode specifically:
Work as QEnergy storage is used≥QPressure regulation needs (9)
In formula: QEnergy storage is usedThe originals such as reactive power needed for removing equipment fault, charging station for each charging pile system in charging station Because of the reactive power summation that can be provided to system;QPeak regulation needsFor (the i.e. Q in Fig. 2 of reactive power needed for power grid voltage regulatingg)。
At this point, the reactive power of n charged in parallel stake system concentrates sending in charging station, meet power grid voltage regulating and charging station Reactive requirement, each charging pile system and network re-active power are exchanged for 0 in charging station, and electric car charge power is by retired electricity Pond energy-storage units meet.Charging station specifically to network system inject reactive power be
In formula: QCharging pile 1~QCharging pile nBy 1~n of charging pile system energy sending/absorption reactive power;QEnergy storageFor charging pile system Uniting 1~n institute can sending/absorbing reactive power summation;QPressure regulation needsFor (the i.e. Q in Fig. 2 of reactive power needed for power grid voltage regulatingg)。
Work as QEnergy storage is used< QPressure regulation needs (11)
At this point, each charging pile system issues reactive power maximum value in charging station, meets charging station reactive requirement, pass through Meet system pressure regulating reactive power demand with the cooperation of power grid unit, each charging pile system and network re-active power are handed in charging station It is changed to 0, electric car charge power is met by retired battery energy storage unit.Charging station specifically to system inject reactive power be
In formula: QCharging pile 1max~QCharging pile nmaxBy 1~n of charging pile system energy sending/absorption reactive power maximum value; QEnergy storage maxBy 1~n of charging pile system energy sending/absorbing reactive power maximum value summation.
(when charging, charging station no longer provides backup service for power grid to the charge control step, only meets electric car Charge requirement) specifically:
When power grid provides electric energy (13)
Power grid meets charge carrier charge power demand at this time, and retired battery energy storage unit is not contributed, and only meets charging station Reactive power demand.Specific value is
In formula: Pcn1~PcnnPower is provided for the retired power battery energy-storage units in 1~n of charging pile system;Pqc1~ PqcnFor the electric car power demand in 1~n of charging pile system;PgThe active power provided for power grid.
Work as satisfaction
Power grid does not provide electric energy (15)
The retired battery energy storage unit power output in 1~n of charging pile system meets charge carrier charge power demand at this time, electricity Net does not provide power.Specific value is
In formula: Pqc1~PqcnWith Pcn1~PcnnIt corresponds, i.e., (P when in such as charging pile system m without charge carrier chargingqcm =0), the retired power battery energy-storage units in the charging pile system are not also contributed (Pcnm=0).
The present invention relies on the existing charging technique and standard of direct-current charging post, can recycle retired power battery on the spot, realizes " move back and use " and " plug and play " of the retired battery of electric car, and without carrying out careful classification to retired power battery, it is complete Break battery types, voltage, capacity and the inconsistent constraint of communications protocol entirely, be greatly lowered that retired battery echelon utilizes answers With cost, utilization efficiency is improved, while increasing substantially the utilization efficiency of existing charging station.It is exchanged by multiple charging piles in parallel Control makes charging station tool and power grid interaction function (similar V2G function), provides the auxiliary such as peak regulation, frequency modulation, pressure regulation clothes for power grid Business, extends the function of charging station, and the integrated setting and function for realizing charging station and energy-accumulating power station integrate (unification of two stations), Set of system can realize two kinds of functions, and charging station structure is simple, optimizes, is more efficient, and cost is lower, saves a large amount of community lands Resource improves land utilization efficiency.The single single business model for electric car charging of existing charging station is broken, has realized For the function of grid service energy-accumulating power station, while the minimization of cost that retired battery echelon utilizes is realized, before having wide business Scape.It is specific as follows:
1, to charging station benefit
(1) DC charging of the present invention utilized based on power battery echelon and can provide power grid ancillary service function It stands, by retired power battery, dispersed placement realizes that charging pile is integrated with energy-accumulating power station beside each charging pile on the spot, More charging pile exchange Parallel Controls are relied on, multiple exchange charged in parallel stakes concentrate power output, meet the charge carriers such as electric car and fill While electricity demanding, it can also realize and be interacted with grid power, charging station is made to have power grid ancillary service function, improve charging pile Utilization rate, increase the profit model of charging station, the integrated setting and function for realizing charging station and energy-accumulating power station integrate (two Stand unification), set of system can realize two kinds of functions, and charging station structure is simple, optimization, more efficient, save a large amount of community lands Resource, project investment are at low cost.It can also be realized " paddy electricity peak use " by " space-time translation " of electric energy, rise to power station as electricity Electrical automobile charging ability reduces charging station operation cost, greatly shortens the construction investment period of investment return.
It is described to be utilized based on power battery echelon and can provide the DC charging station of power grid ancillary service function according to difference Project needs, and can guarantee retired power battery service life, charge and discharge control mode spirit with the retired power battery capacity of flexible configuration It is living, effectively reliably meet grid power demand and electric car charging service.
2, handle retired power battery and utilize benefit
(1) DC charging of the present invention utilized based on power battery echelon and can provide power grid ancillary service function Battery recycling station can be set up on the spot by standing, and retired power battery " can be moved back and be used ", avoid the long distance delivery of retired power battery With careful classification, recovery time and transportation cost are greatly reduced;The mode of the retired power battery in conjunction with charging station is not necessarily to It the preliminary screenings such as disassembled, detected, being recombinated to retired power battery, need to only carry out simply screening and (replace appearance with detection Measure extremely low single battery), and broken retired power battery type, battery capacity, voltage, communicated the restriction such as inconsistent, pole The earth reduces the processing cost of retired power battery.Retired power battery can be greatly lowered in sum up two o'clock, the present invention Echelon utilizes cost, has given full play to its function and engineering application value.
(2) the DC charging station for being utilized based on power battery echelon and can provide power grid ancillary service function is each Charging pile have multiple unified standard interfaces, retired battery can " plug and play ", by retired power battery " dispersed placement, The mode of centralized control " not only overcomes retired power battery using preliminary screening when recombination connection, centralized arrangement scheme completely Easily there is " wooden pail effect ", Control System Design complexity, heat treatment technics difficulty, No. one or two electrical equipments in many and diverse, battery system A series of unfavorable factors such as repetition is arranged, the civil construction period is long and at high cost, later period O&M cost is big, save a large amount of public affairs Land resource and human and material resources, financial resources altogether, and can be implemented as the backup service of power grid, avoid charging station transformer from expanding Caused cost when appearance.
(3) the DC charging station for being utilized based on power battery echelon and can provide power grid ancillary service function can be real The echelon of the existing retired power battery of various types utilizes, and opens new scene for retired power battery low cost application, is battery Energy storage profit model opens new approaches, can greatly facilitate the fast development in battery energy storage field, can be China's charging pile And the construction of new-energy automobile and production provide new power.
3, to power grid benefit
(1) DC charging of the present invention utilized based on power battery echelon and can provide power grid ancillary service function Standing has the function of peak regulation, frequency modulation etc., and peak load regulation network frequency modulation pressure is effectively relieved by way of providing backup service for power grid, Promote the consumption of the new energy such as wind-powered electricity generation, photovoltaic, provide strong support for large-scale grid connections such as wind-powered electricity generation, photovoltaics, is wind-powered electricity generation, photovoltaic etc. The benign sound development of green friendly new energy provides a strong guarantee.
(2) the DC charging station for being utilized based on power battery echelon and can provide power grid ancillary service function has storage The function in energy power station is realized its effective echelon by way of retired battery " dispersed placement, centralized control " and utilized, both with low Cost alleviates the power shortage of peak load regulation network frequency modulation, at the same problems when also having evaded retired battery centralized arrangement with answer With barriers such as the construction such as lithium battery, flow battery concentrated energy-accumulating power station cost of investment height, business promotion difficulties, save a large amount of Cost of investment.
(3) the DC charging station for being utilized based on power battery echelon and can provide power grid ancillary service function is retired The application of power battery can be combined with Generation Sides such as photovoltaic, wind-powered electricity generations, can also be applied to transmission of electricity, distribution and the use of power grid Electric side etc., application scenarios are extensive, and profit model is abundant, and commercial value is larger.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its His embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or Adaptive change follow general principle of the invention and including the undocumented common knowledge in the art of the present invention or Conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by claim It points out.

Claims (9)

1. a kind of charging pile system, it is characterised in that: including charging pile, and the retired power battery energy storage being connected with charging pile Unit, wherein the retired power battery energy-storage units include several retired power batteries in parallel, the retired electric power electricity Pond is controlled by intelligent toggle switch, retired power battery energy-storage units and charging pile real-time communication, and carries out energy exchange.
2. a kind of charging pile system as described in claim 1, it is characterised in that: the charging pile includes n AC/DC in parallel Module, the AC/DC module will through over commutation circuit and booster circuit after being filtered the three-phase alternating current of distribution bus Alternating voltage becomes steady dc voltage, exempts from circuit realization and the power of corresponding retired power battery energy-storage units by pushing away Exchange.
3. a kind of charging pile system as described in claim 1, it is characterised in that: the charging pile be equipped with respectively with retired power The connected standard interface of battery energy storage unit, charge carrier.
4. the charging station with power grid ancillary service function, it is characterised in that: including N number of in parallel as right wants any power of 1-3 Benefit requires the charging pile system.
5. the charging station control method with power grid ancillary service function, it is characterised in that: control and walk including power grid ancillary service Rapid and charge control step, wherein the power grid ancillary service rate-determining steps include at least following one mode:
Peak load regulation network mode: after receiving the peak regulation instruction that dispatching of power netwoks is assigned, charging station is each according to power information coordinated allocation The peak regulation power of charging pile system;
Power grid frequency modulation mode: after receiving the frequency modulation instruction that dispatching of power netwoks is assigned, charging station is each according to power information coordinated allocation The frequency modulation power of charging pile system;
Power grid voltage regulating mode: after receiving the pressure regulation instruction that dispatching of power netwoks is assigned, charging station is each according to power information coordinated allocation The pressure regulation reactive power of charging pile system.
6. as claimed in claim 5 with the charging station control method of power grid ancillary service function, it is characterised in that: the electricity Net peak regulation mode specifically:
Work as PEnergy storage is used≥PPeak regulation needs (1)
In formula: PEnergy storage is usedRetired power battery is removed because SOC is unsatisfactory for, equipment fault, vapour for each charging pile system in charging station The active power summation that vehicle charge power reason can be provided to network system;PPeak regulation needsFor active power needed for peak load regulation network;
At this point, n charging pile system in parallel concentrates power output in charging station, meet peak load regulation network power demand, charging station is to electricity Net system injection active power be with reactive power
In formula: PCharging pile 1~PCharging pile nFor 1~n of charging pile system active power can be exchanged with network system;PEnergy storageFor charging pile system 1~n of system can exchange active power summation with network system;QCharging station needsFor charging station reactive power demand;
Work as PEnergy storage is used< PPeak regulation needs (3)
At this point, each charging pile to network system provides the maximum value of active power in charging station, and other machines are assembled with power grid It closes, meets peak load regulation network power demand, the active power that charging station specifically injects is with reactive power
In formula: Pcdz1max~Pcdz1maxThe active power maximum value that can be provided for each charging pile;PEnergy storage maxFor each charging pile The active power maximum value summation that can be provided;PPower grid unitFor other units of power grid issue active power to realize peak load regulation network The demand of power.
7. as claimed in claim 5 with the charging station control method of power grid ancillary service function, it is characterised in that: the electricity Net hopping pattern specifically:
Work as PEnergy storage is used≥PFrequency modulation needs (5)
At this point, n charging pile system in parallel concentrates power output in charging station, meet power grid frequency modulation power demand, charging station is to electricity Net system injection active power be with reactive power
In formula: PPeak regulation needsFor active power needed for peak load regulation network;
Work as PEnergy storage is used< PFrequency modulation needs (7)
At this point, each charging pile to system provides the maximum value of active power in charging station, and cooperate with other units of power grid, it is full Sufficient power grid frequency modulation power demand, the active power that charging station specifically injects are with reactive power
8. as claimed in claim 5 with the charging station control method of power grid ancillary service function, it is characterised in that: the electricity Net pressure regulation mode specifically:
Work as QEnergy storage is used≥QPressure regulation needs (9)
In formula: QEnergy storage is usedReactive power reason institute energy needed for removing equipment fault, charging station for each charging pile system in charging station The reactive power summation provided to system;QPeak regulation needsFor reactive power needed for power grid voltage regulating;
At this point, the reactive power of n charged in parallel stake system concentrates sending in charging station, it is idle with charging station to meet power grid voltage regulating Demand, each charging pile system and network re-active power are exchanged for 0 in charging station, and electric car charge power is stored up by retired battery Energy unit meets, and charging station is specifically to the reactive power that network system is injected
In formula: QCharging pile 1~QCharging pile nBy 1~n of charging pile system energy sending/absorption reactive power;QEnergy storageFor charging pile system 1 ~n institute can sending/absorbing reactive power summation;QPressure regulation needsFor reactive power needed for power grid voltage regulating;
Work as QEnergy storage is used< QPressure regulation needs (11)
At this point, each charging pile system issues reactive power maximum value in charging station, meet charging station reactive requirement, by with electricity The cooperation of net unit meets system pressure regulating reactive power demand, and each charging pile system is exchanged for network re-active power in charging station 0, electric car charge power is met by retired battery energy storage unit, and charging station is specifically to the reactive power that system is injected
In formula: QCharging pile 1max~QCharging pile nmaxBy 1~n of charging pile system energy sending/absorption reactive power maximum value;QEnergy storage maxFor 1~n of charging pile system institute can sending/absorbing reactive power maximum value summation.
9. as claimed in claim 5 with the charging station control method of power grid ancillary service function, it is characterised in that: described to fill Electric control step, specifically:
When power grid provides electric energy (13)
Power grid meets charge carrier charge power demand at this time, and retired battery energy storage unit is not contributed, and it is idle only to meet charging station Power demand, specific value are
In formula: Pcn1~PcnnPower is provided for the retired power battery energy-storage units in 1~n of charging pile system;Pqc1~Pqcn For the charge carrier power demand in 1~n of charging pile system;PgThe active power provided for power grid;
Work as satisfaction
Power grid does not provide electric energy (15)
The retired battery energy storage unit power output in 1~n of charging pile system meets electric vehicle charge power demand at this time, and power grid does not mention For power, specific value is
In formula: Pqc1~PqcnWith Pcn1~PcnnIt corresponds, i.e., (P when in such as charging pile system m without charge carrier chargingqcm= 0), the retired power battery energy-storage units in the charging pile system are not also contributed (Pcnm=0).
CN201811553285.6A 2018-12-19 2018-12-19 Charging station, charging pile system and control method with power grid ancillary service function Pending CN109510250A (en)

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CN112421688A (en) * 2020-10-30 2021-02-26 南京因泰莱电器股份有限公司 Frequency and voltage modulation method for battery energy storage system
CN112277711A (en) * 2020-11-02 2021-01-29 四川云起老和科技有限公司 Multi-charging-mode charging pile control method considering matching of electric automobile
CN112865080A (en) * 2021-01-15 2021-05-28 河海大学 Compensation method for battery energy storage participating in power grid voltage regulation auxiliary service
CN113328452A (en) * 2021-06-08 2021-08-31 湖南汽车工程职业学院 Retired power battery and retired super capacitor combined mobile energy storage charging system
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CN115224704A (en) * 2022-08-03 2022-10-21 北京能高自动化技术股份有限公司 Time-sharing multiplexing peak-regulating frequency-modulating power station constructed based on hybrid energy storage and control method
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