CN104242364A - Charge and discharge control device and method and electric automobile swapping station - Google Patents
Charge and discharge control device and method and electric automobile swapping station Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention provides a charge and discharge control device and method and an electric automobile swapping station. The charge and discharge control device controls a light storage system. The light storage system is connected into a power grid and composed of a photovoltaic power generation portion and an energy storage device. The charge and discharge control device comprises a storage portion, a light storage system initial value target calculation portion, a light storage system target correction portion and a control portion, wherein the storage portion stores historical data information of a plurality of control periods of the output power of the photovoltaic power generation portion, the light storage system initial value target calculation portion calculates a control target initial value curve of the output power of the light storage system of the next control period according to the historical data information stored in the storage portion, the light storage system target correction portion corrects the control target initial value curve according to charge and discharge power information and the capacity of the energy storage device to obtain a control target value curve of the output power of the light storage system, and the control portion controls the charge and discharge of the energy storage device so as to enable the output of the light storage system to conform to the control target value curve of the light storage system.
Description
Technical field
The present invention relates to charge-discharge controller, method and electric automobile charging station, particularly relate to and be applicable to light storage formula electric automobile and fill charge-discharge controller in electrical changing station and method, belong to micro-capacitance sensor field.
Background technology
Along with the high speed development of electric automobile, the charging problems of its battery used also comes head-on.In the charge mode of electric automobile, generally comprise rechargeable and change electric-type two kinds of patterns.Wherein, rechargeablely refer to that electric automobile carries out the mode of charging by external power supply after sailing charging station into, this will expend considerable time; And change after electric-type refers to that electric automobile enters electrical changing station, the cost very short time changes the mode of charged by electrical changing station battery.In the supporting infrastructure of these two kinds of patterns, electric automobile charging station has caused the attention of domestic and international many mechanisms.
At present, the charging electric vehicle facility that the country such as the U.S., Japan, Israel, Britain, France is all speeding up the construction respective, but main based on rechargeable, carry out the research and pilot work of changing electric-type simultaneously.State Grid Corporation of China is according to Chinese practice, and proposed the principle of " it is main for changing electricity, and slotting filling is auxiliary, concentrates charging, unified dispensing " in 2010, the charging electric vehicle facility adopting and change electric-type is promoted in reinforcement at home.
Meanwhile, clean reproducible energy, as the important means solving energy problem and environmental problem, has become the development trend of the world today.Wherein photovoltaic generation is flexible for installation because of it, safe and reliable, can be used as the energy source that electrical changing station is important.In addition, the important regulating and controlling means that energy-storage system exports as regenerative resource, are widely used.The popularization of light storage formula electric automobile charging station, not only can reduce the energy demand of electrical changing station to electrical network, alleviate electrical network burden, clean environment firendly more, electric facility can be changed in the area construction not possessing condition of power supply simultaneously, the electric automobile solving remote districts and highway changes electric problem, greatly improves the scope of application of electric automobile.Therefore the research of this pattern is promoted for electric automobile, and electric automobile changes electric infrastructure network construction, and it is all significant to build energy saving and environment friendly society.
Patent Document 1 discloses a kind of above-mentioned light storage formula electric automobile and fill electrical changing station, comprise photovoltaic generating system, energy-storage system of accumulator, electric automobile charging station and station load, described photovoltaic generating system comprises solar module, combining inverter and photovoltaic power supply management system, is articulated on photovoltaic system power supply buses; Described energy-storage system of accumulator comprises batteries, battery management system and two-way inverter, is articulated on load power supply buses; Electric automobile charging station and station load are all articulated on load power supply buses; The 380V bus that described photovoltaic system power supply buses and load power supply buses are divided into AC network is respectively connected, and is connected between described photovoltaic system power supply buses and described load power supply buses by photovoltaic access circuit breaker.
The light storage formula electric automobile of patent documentation 1 fills electrical changing station, electric power is provided by photovoltaic generating system, storage battery used for electric vehicle is as energy-storage system, whole system is incorporated to urban power distribution network, both can realize charging electric vehicle, change the needs of electricity, emergency power supply can be provided for power distribution network again, simultaneously due to the cushioning effect of energy-storage system of accumulator, reduce the impact of fluctuation on electrical network of photovoltaic generation.When electrical network normally runs with electrical grid failure, all can ensure charging electric vehicle work and change carrying out smoothly of electricity work.
Patent documentation 1: the open CN102355023A of Chinese patent
Summary of the invention
But, such problem is not considered in patent documentation 1, namely, the output of photovoltaic generating system is by inside even from weather, be difficult to Accurate Prediction and control, this severely limits the installed capacity of photovoltaic generation, challenge is proposed to the energy security management of electrical changing station simultaneously.
Current regenerative resource Forecasting Methodology is mainly divided into based on historical data and based on model of influencing factors two class.External output common to photovoltaic generating system (i.e. the present invention's photovoltaic generation described later portion) and energy-storage system (i.e. the present invention's energy storage device described later) is mainly set to constant output desired value by control method, but do not take into full account the output randomness of regenerative resource, there is the inefficient problem of regulation and control.That is, although existing control method has formulated constant output desired value, may there is very large floating in the photovoltaic generating system of reality and the common external output of energy-storage system near desired value.
Further, the light storage formula electric automobile disclosed in above-mentioned patent documentation 1 fills in electrical changing station, and photovoltaic generating system, energy-storage system, charging station and station load structure micro-grid system, is operated in lonely net and grid-connected two states.Because the output of photovoltaic system is by inside even from weather; be difficult to Accurate Prediction and control, when being operated in lonely net state, when photovoltaic generating system exports high; there is the problem of photovoltaic energy waste; and when be operated in and net state time, when having installed Large Copacity photovoltaic power generation apparatus, exist to the reverse trend of electrical network may; because it is difficult to prediction; to electric network reliability be affected, and when installed protection device, then photovoltaic generation utilance can be caused to reduce.
In view of above problem, charge-discharge controller of the present invention, historical data is utilized to set up the probability distribution of photovoltaic generation output, consider power and the capacity limit of the storage battery of energy storage device, the photovoltaic formulating next cycle exports control objectives and carries out charge and discharge control according to target to energy storage device, and then also formulates corresponding battery charging plan and electrical network power taking plan according to this target and charge requirement.
Specifically, the invention provides a kind of charge-discharge controller, to be connected to the grid, the light-preserved system that is made up of photovoltaic generation portion and energy storage device controls, comprising: storage part, preserve the historical data information of multiple control cycles of the power output in described photovoltaic generation portion; Light-preserved system initial value target calculating part, according to the described historical data information be kept in described storage part, calculates the control objectives initial value curve of the power output of the light-preserved system of next control cycle; Light-preserved system target correction portion, according to the capacity of described energy storage device and the information of charge-discharge electric power, revises described control objectives initial value curve, obtains the control objectives value curve of the power output of light-preserved system; And control part, the discharge and recharge of described energy storage device is controlled, makes described photovoltaic generation portion to described energy storage device charging or described energy storage device is discharged, meeting described control objectives value curve to make the power output of described light-preserved system.
In addition, the invention provides a kind of electric automobile charging station, comprising: the light-preserved system be made up of photovoltaic generation portion and energy storage device; To the power battery charging portion that the electrokinetic cell of electric automobile charges; With above-mentioned charge-discharge controller, described light-preserved system is connected to the grid all the time.
In addition, the present invention also provides a kind of charge/discharge control method, to be connected to the grid, the light-preserved system that is made up of photovoltaic generation portion and energy storage device controls, comprise: light-preserved system initial value target calculation procedure, according to the historical data information of multiple control cycles of the power output in described photovoltaic generation portion, calculate the control objectives initial value curve of the power output of the light-preserved system of next control cycle; Light-preserved system target correction step, according to the capacity of described energy storage device and the information of charge-discharge electric power, revises described control objectives initial value curve, obtains the control objectives value curve of the power output of light-preserved system; And rate-determining steps, the discharge and recharge of described energy storage device is controlled, makes described photovoltaic generation portion to described energy storage device charging or described energy storage device is discharged, meeting described control objectives value curve to make the power output of described light-preserved system.
According to charge-discharge controller of the present invention and method, cooperation control is carried out to photovoltaic generation portion and energy storage device, make photovoltaic generation be in grid-connected connection status all the time, improve the utilance of photovoltaic generation.By formulating fixing control objectives curve, giving full play to the regulating power of storage battery, light-preserved system being exported according to fixing power output, decreases uncertainty, promoting the reliability of electrical network.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the light storage formula electric automobile charging station applying charge-discharge controller of the present invention.
Fig. 2 represents the schematic diagram of the formulation flow process of electrical changing station energy management control plan.
Fig. 3 is the schematic diagram representing light-preserved system control objectives initial value M curve.
Fig. 4 represents that the discharge and recharge considering energy storage device balances and adjusts to obtain the schematic diagram of M ' curve to above-mentioned M curve.
Fig. 5 is the schematic diagram of the effect representing charge-discharge controller of the present invention.
Fig. 6 is the schematic block diagram of the general configuration representing charge-discharge controller of the present invention.
Fig. 7 is the schematic diagram of the control flow representing charge-discharge controller of the present invention.
Embodiment
With reference to the accompanying drawings embodiments of the present invention are described.But, following execution mode is only an example of the present invention, and the protection range of application claims not limited by this execution mode.
Fig. 1 is the overall structure block diagram representing the light storage formula electric automobile charging station applying charge-discharge controller of the present invention.Wherein, what represent on the left of Fig. 1 is that electric automobile 2 sails in electric automobile charging station 1, and the electrokinetic cell 3 finished using by electricity or be about to finish using is replaced by the situation of the battery be full of by electrical changing station.The general configuration of electric automobile charging station 1 is illustrated on the right side of Fig. 1.
In electric automobile charging station 1, the part such as photovoltaic generation portion 4, energy storage device 5 and automobile power cell charging part 9 forms the power module of electrical changing station, and charge-discharge controller 7 forms control module.Wherein, photovoltaic generation portion 4 and energy storage device 5 form light-preserved system 8.Photovoltaic generation portion 4 is made up of a large amount of solar power generation assembly, and energy storage device 5 is made up of multiple storage battery.The effect of energy storage device 5 is, the output (power output) of light-preserved system 8 is adjusted, when the output in photovoltaic generation portion 4 is too high, energy storage device 5 charges and absorbs the output in photovoltaic generation portion 4, when the output in photovoltaic generation portion 4 is too low, energy storage device 5 discharges and supplements the output in photovoltaic generation portion 4, controls the output of light-preserved system 8 for desired value thus.
Each several part in power module is connected to each other to realize electric power transfer by the electrical wiring that solid line in Fig. 1 represents, and the communication line represented by a dotted line is connected with charge-discharge controller 7, carries out overall control by charge-discharge controller 7.Communication line as used herein can be applicable any communication line in prior art.Each part mentioned above in electric automobile charging station 1 forms micro-grid system, and is merged in electrical network 6.
Electric automobile 2 change in electric automobile charging station 1 under electricity finished using or be about to the electrokinetic cell 3 of finishing using, undertaken unifying to control by electric automobile charging station 1, charge through power battery charging portion 9 by demand.Energy for charging is provided jointly by light-preserved system 8 and electrical network 6.Charge-discharge controller 7 for the charging etc. of the generating and power battery charging portion 9 that control light-preserved system 8, to the state of storage battery, the state in photovoltaic generation portion 4 and the electrical network in the charged state in power battery charging portion 9, energy storage device 5 and the monitoring state of site.
As mentioned above, the output in photovoltaic generation portion 4, by inside even from weather, is difficult to Accurate Prediction and control.Existing control system, usually according to historical data or influencing factor, the output of light-preserved system 8 is set as constant output target, but there is above-mentioned variety of problems in such control mode.
Charge-discharge controller of the present invention improves control method, specifically, it is divided into control plan to formulate and monitors two stages in real time, first according to the historical data that photovoltaic generation portion 4 exports, formulate light-preserved system 8 generation schedule (light-preserved system control objectives value) of the prediction curve meeting photovoltaic output, electrokinetic cell 3 charges plan and electrical network 6 power taking plan.Then according to the plan of formulating, charge and discharge control is carried out to energy storage device 5, arrange the charging in power battery charging portion 9, monitor electrical network in real time and site power.
The control method of accompanying drawing 2 ~ 4 to charge-discharge controller 7 of the present invention is utilized to be described below.
First, the control plan of energy management formulates flow process as shown in Figure 2.
1. the probability distribution utilizing historical data to set up photovoltaic generation portion to export, considers power and the capacity limit of storage battery in energy storage device, formulates the light-preserved system control objectives value curve (1. fixing curve of output namely in figure) in next cycle.
Assuming that in units of the time interval of data collection and control plan the time, in embodiment, the plans cycle is m unit interval.Such as, when by hour in units of time and one-period be one time, m is 24.
This step is divided into following three sub-steps:
1). arrange photovoltaic generation and export historical data, obtain following matrix.
Formula (1):
Element wherein in s-matrix is that photovoltaic exports probable value, S
nmn-th output probable value (value that namely in historical data occurred) of representative on the time point of m unit interval, in Ps, element is the probable value corresponding to S element.
For the preparation method of clear and definite s-matrix and Ps matrix, below use the analogue data of following table [1] to carry out schematic view, for the sake of simplicity, it is one day that design draws fixed cycle, the unit interval of data acquisition is one hour, illustrate only the historical data of 5 days in table.
Table [1]
According to the historical data of table [1], be from left to right time sequencing according to the data of every a line, the data of each row are from top to bottom for photovoltaic exports probable value order from big to small, and the Ps matrix obtaining s-matrix and correspondence is as follows.
Formula (2):
Wherein, such as in one day 5 time (first row indicated in above-mentioned s-matrix and Ps matrix), photovoltaic exports probable value 6,5,4 three values, wherein the probability of occurrence of 6 be 3/5,5,4 output probability be 1/5.Can notice, the quantity of the photovoltaic output probable value of each row (i.e. each acquisition time) is not identical, and the row exporting probable value less for photovoltaic carry out zero padding process, to the corresponding probability zero padding process similarly in the Ps matrix that it is corresponding.
In addition, it should be noted that the size of n according to historical data number and data precision determine, when historical data is huge, data precision is higher, and when causing the repeatability of the historical data of some acquisition time lower, n may be very huge.At this moment, suitably can adopt approximate processing, such as, minimum dividing unit be set to power output, the photovoltaic be in same dividing unit be exported probable value and is considered as same value and probability is added.Here minimum dividing unit can be determined arbitrarily according to control precision.
2). the control objectives initial value M curve of light-preserved system 8 can be obtained by following formula.
Formula (3):
M=diag(Ps
TS)=[M
1,L,M
m]
Element wherein in M is the control objectives initial value of upper light-preserved system 8 of each acquisition time, and namely all output probable values of each time point weighted sum that is weight with its probability, only determined by the historical data in photovoltaic generation portion 4 herein.
Fig. 3 illustrates the diagram of M curve exemplarily.In this Fig. 3, horizontal axis representing time, the longitudinal axis represents power output.For the sake of simplicity, usage flag 1. ~ 5. represent each acquisition time photovoltaic export probable value, its ordinate be corresponding photovoltaic export probable value.
3). consider capacity and the charge-discharge electric power of the storage battery of energy storage device 5, adjustment control objectives curve.Discharge and recharge probability is balanced, according to reality, can suppose that, for each time point, the probability of power output meets normal distribution, so when discharge and recharge probability balances, the probable range in the charge-discharge electric power of storage battery limit can be made to cover maximum.Wherein, the charge-discharge electric power of the energy storage device arrived mentioned herein, refers to its specified maximum charge-discharge electric power.
Concrete method of adjustment as shown in Figure 4, determines the EQUILIBRIUM CALCULATION FOR PROCESS time range that its discharge and recharge probability is balanced according to the battery capacity C of energy storage device 5, in the present embodiment, the time range of EQUILIBRIUM CALCULATION FOR PROCESS is 2 unit interval.For each EQUILIBRIUM CALCULATION FOR PROCESS time range, calculate the upper probability of M curve and U and lower probability and L.Here, the upper probability of M curve and U refer to the probability sum that the performance number all photovoltaics be in above M curve export probable value, and lower probability and L refer to the probability sum that the performance number all photovoltaics be in below M curve export probable value.
| (wherein ε is enough little value to U-L| > probability difference threshold epsilon, ε > 0) when, be judged to need to adjust the control objectives value of final time point in current consideration time range, to reduce the difference between U and L, reach the probability balance of discharge and recharge.That is, as U-L > ε, the control objectives value adjusting final time point in current consideration time range increases a certain power adjustment x; Otherwise as U-L<-ε, adjustment exports target and reduces a certain power adjustment x.Here, probability difference threshold epsilon and power adjustment x are generally empirical value or tentative calculation value, need the actual conditions according to electrical changing station entirety and set.
Repeatedly calculate each time point, adjustment aim curve to all EQUILIBRIUM CALCULATION FOR PROCESS time ranges difference all met between U and L is below probability difference threshold epsilon.Finally obtain light-preserved system control objectives value curve M '.
Here M ' curve is illustrated only based on the historical data in photovoltaic generation portion 4 and the capacity of energy storage device 5 and charge-discharge electric power and situation about obtaining, but also can suitable reference environment influencing factor---such as Weather information etc. and each value of curve is optimized.
2., according to the electrokinetic cell quantity and the amount of capacity that need charging, consider the curve of output arrangement charging plan of light-preserved system generating.
At the end of supposing a upper control cycle or plan when starting to formulate electrokinetic cell total capacity to be charged be N, total electricity MS=∑ M ' of power supply wherein can be provided by light-preserved system, according to electrical network the Power Limitation of site and electrical network TOU(Time of Use, Peak-valley TOU power price) price, formulate chargometer tracing X and the electrical network power taking Plan Curve G of cost minimization, to meet battery charge requirement.During formulation chargometer tracing X based on curve M S, promote the charge power of TOU price low spot successively, until meet the aggregate demand N of battery charging.
Light-preserved system control objectives value curve M can be obtained according to above-mentioned flow process ', chargometer tracing X, during electrical changing station operation, according to the charging and discharging state of storage battery in M ' curve controlled energy storage device 5, make light-preserved system 8 according to control objectives value power output, control power battery charging portion 9 according to chargometer tracing X to power battery charging simultaneously.
According to above-mentioned control method, the result shown in Fig. 5 can be obtained.According to this figure, there is certain fluctuation in the output of actual photovoltaic Power Generation Section 4, this fluctuation is absorbed by energy storage device 5, namely, make 4 pairs, photovoltaic generation portion energy storage device 5 charge when the power output in photovoltaic generation portion 4 is excessive, when the power output in photovoltaic generation portion 4 is too small, energy storage device 5 is discharged, realize smooth, stable thus and meet the output of the light-preserved system 8 of the prediction of output in photovoltaic generation portion 4.In addition, the difference in Fig. 5 between charge power and the fixing output of light-preserved system 8 is provided by electrical network 6.
Above the control method of charge-discharge controller 7 of the present invention is illustrated.Then the structure for charge-discharge controller 7 is briefly described in conjunction with its control flow, repeats no more for the part that repeats in already described control method.
The general configuration of charge-discharge controller 7 as shown in Figure 6, comprises storage part 13, control part 14, light-preserved system initial value target calculating part 10, communication interface 11 and light-preserved system target correction portion 12 etc.
Wherein, communication interface 11 is for realizing the communication between other parts in charge-discharge controller 7 and electric automobile charging station 1 and electrical network 6.On the one hand, use when the photovoltaic generation portion 4 various information obtained required for charging control are preserved or are kept at temporarily and formulate for control plan storage part 13.On the other hand, energy storage device control signal is passed to energy storage device 5 from control part 14 and is used for controlling its discharge and recharge, battery charging control signal is passed to power battery charging portion 9 from control part 14 and is used for arranging power battery charging.
Preserve in storage part 13 or the interim above-mentioned various information received through communication interface 11 of preserving, the electrokinetic cell quantity of such as charging for the historical data information received from photovoltaic generation portion 4, the needs received from electrokinetic cell charging part 9 and capacity information, information from the capacity of its storage battery used of energy storage device 5 reception and charge-discharge electric power, electrical network the power limitation information of site, electrical network TOU pricing information etc.Certainly, storage part 13 also only can preserve the historical data information in photovoltaic generation portion 4, and other information is then real-time to be obtained from each device.
Fig. 7 represents the control flow schematic diagram of charge-discharge controller 7.
First, the light-preserved system initial value target historical data of calculating part 10 reading and saving in storage part 13 (step S701), according to this historical data, obtain s-matrix and Ps matrix according to above-mentioned formula (1), thus obtain control objectives initial value M curve (step S702) of light-preserved system 8.
Then, the capacity of storage battery that the energy storage device 5 of light-preserved system target correction portion 12 reading and saving in storage part 13 uses and the information (step S703) of charge-discharge electric power, because the capacity of storage battery and charge-discharge electric power can occur deterioration with the permanent use of energy storage device 5, therefore this informational needs timing upgrades.Light-preserved system target correction portion 12 is according to this information read, adjust (step S704) according to the control objectives initial value M curve of method to the light-preserved system 8 obtained in step S702 above illustrated with reference to Fig. 4, obtain revised light-preserved system control objectives M ' curve.
Control part 14 receives revised control objectives M ' curve from light-preserved system target correction portion 12, and from storage part 13, read the electrokinetic cell quantity that needs charging and the information of capacity, electrical network the power limitation information of site and electrical network TOU pricing information (step S705).These information upgrade when each charge target is formulated.According to the information read in step S705 and control objectives M ' curve, obtain chargometer tracing X and corresponding electrical network power taking Plan Curve G(step S706).
Control part 14 sends energy storage device control signal for control its discharge and recharge according to control objectives M ' curve to energy storage device 5 through communication interface 11, and sends battery charging control signal to arrange power battery charging (step S707) according to chargometer tracing X to power battery charging portion 9.
When electrical changing station works, monitored the output in photovoltaic generation portion 4 through communication interface 11 by control part 14, the discharge and recharge of adjustment energy storage device 5, namely make 4 pairs, photovoltaic generation portion energy storage device 5 charge when the power output in photovoltaic generation portion 4 is excessive, when the power output in photovoltaic generation portion 4 is too small, energy storage device 5 is discharged, aim curve M ' is output into what make light-preserved system 8, and control the operating state (arrangement power battery charging) in power battery charging portion 9 and electrical network and the power taking power of site simultaneously, realize the effect shown in Fig. 5.And, due to the power output of light-preserved system 8 described above become smooth, stable and meet the prediction of output curve in photovoltaic generation portion 4, therefore, it is possible to make light-preserved system be in grid-connected connection status all the time, improve the utilance of photovoltaic generation, and make light-preserved system decrease uncertainty, promote the reliability of electrical network.
In addition, the charge-discharge controller of the invention described above is applied in light storage formula electric automobile charging station, but is not limited thereto, and the power supply as electric automobile charging station is originated, and also can use other clean energy resource such as wind energy, tidal energy.
Further, in above-mentioned explanation, above-mentioned charge-discharge controller and method are applied in electric automobile charging station, but are not limited thereto, and also can be applied to and utilize light-preserved system to carry out other facility charged.
Claims (11)
1. a charge-discharge controller, to be connected to the grid, the light-preserved system that is made up of photovoltaic generation portion and energy storage device controls, it is characterized in that, comprising:
Storage part, preserves the historical data information of multiple control cycles of the power output in described photovoltaic generation portion;
Light-preserved system initial value target calculating part, according to the described historical data information be kept in described storage part, calculates the control objectives initial value curve of the power output of the light-preserved system of next control cycle;
Light-preserved system target correction portion, according to the capacity of described energy storage device and the information of charge-discharge electric power, revises described control objectives initial value curve, obtains the control objectives value curve of the power output of light-preserved system; With
Control part, controls the discharge and recharge of described energy storage device, makes described photovoltaic generation portion to described energy storage device charging or described energy storage device is discharged, meeting described control objectives value curve to make the power output of described light-preserved system.
2. charge-discharge controller as claimed in claim 1, is characterized in that:
Described historical data information obtains in the following manner:
In a control cycle, set multiple data acquisition time point, measure the power output in the described photovoltaic generation portion of each data acquisition time point in each control cycle.
3. charge-discharge controller as claimed in claim 2, is characterized in that:
Described light-preserved system initial value target calculating part, described historical data information is arranged, ask for the described power output in photovoltaic generation portion and the probability of appearance thereof that each described data acquisition time point once occurred, export probable value respectively as photovoltaic generation and export probability corresponding to probable value with this photovoltaic generation
Further, for each described data acquisition time point, all photovoltaic generation on this data acquisition time point is exported probable value with the probability corresponding with it for weight is sued for peace, obtains the described control objectives initial value of this data acquisition time point,
The described control objectives initial value of each data acquisition time point forms described control objectives initial value curve in chronological order.
4. charge-discharge controller as claimed in claim 3, is characterized in that:
Described light-preserved system target correction portion, according to the capacity of described energy storage device and the information of charge-discharge electric power, determines the EQUILIBRIUM CALCULATION FOR PROCESS time range revising described control objectives initial value curve,
For EQUILIBRIUM CALCULATION FOR PROCESS time range described in each, calculate all described photovoltaic generation be positioned at above described control objectives initial value curve export probable value probability and, as upper probability and; And calculate all described photovoltaic generation be positioned at below described control objectives initial value curve export probable value probability and, as lower probability and,
The described control objectives initial value of data acquisition time last in EQUILIBRIUM CALCULATION FOR PROCESS time range described in each point is revised, with make described upper probability and with described lower probability and the absolute value of difference be less than predetermined setting, using the described control objectives value of revised described control objectives initial value as this data acquisition time point
Repeatedly perform described correction, obtain the described control objectives value of each acquisition time, form described control objectives value curve in chronological order by the described control objectives value of each data acquisition time point.
5. an electric automobile charging station, is characterized in that, comprising:
The light-preserved system be made up of photovoltaic generation portion and energy storage device;
To the power battery charging portion that the electrokinetic cell of electric automobile charges; With
Charge-discharge controller according to any one of Claims 1 to 4,
Described light-preserved system is connected to the grid all the time.
6. electric automobile charging station as claimed in claim 5, is characterized in that:
The control part of described charge-discharge controller, also according to quantity and the amount of capacity of the electrokinetic cell that will charge in described power battery charging portion, formulate chargometer tracing based on described control objectives value curve, arrange charging plan to control described power battery charging portion.
7. electric automobile charging station as claimed in claim 6, is characterized in that:
When described control part formulates described chargometer tracing, also consider the electrical network of described electric automobile charging station and the Power Limitation of site and electrical network Peak-valley TOU power price, formulate electrical network power taking plan.
8. a charge/discharge control method, to be connected to the grid, the light-preserved system that is made up of photovoltaic generation portion and energy storage device controls, it is characterized in that, comprising:
Light-preserved system initial value target calculation procedure, according to the historical data information of multiple control cycles of the power output in described photovoltaic generation portion, calculates the control objectives initial value curve of the power output of the light-preserved system of next control cycle;
Light-preserved system target correction step, according to the capacity of described energy storage device and the information of charge-discharge electric power, revises described control objectives initial value curve, obtains the control objectives value curve of the power output of light-preserved system; With
Rate-determining steps, controls the discharge and recharge of described energy storage device, makes described photovoltaic generation portion to described energy storage device charging or described energy storage device is discharged, meeting described control objectives value curve to make the power output of described light-preserved system.
9. charge/discharge control method as claimed in claim 8, is characterized in that:
Described historical data information obtains in the following manner:
In a control cycle, set multiple data acquisition time point, measure the power output in the described photovoltaic generation portion of each data acquisition time point in each control cycle.
10. charge/discharge control method as claimed in claim 9, is characterized in that:
In described light-preserved system initial value target calculation procedure, described historical data information is arranged, ask for the described power output in photovoltaic generation portion and the probability of appearance thereof that each described data acquisition time point once occurred, export probable value respectively as photovoltaic generation and export probability corresponding to probable value with this photovoltaic generation
Further, for each described data acquisition time point, all photovoltaic generation on this data acquisition time point is exported probable value with the probability corresponding with it for weight is sued for peace, obtains the described control objectives initial value of this data acquisition time point,
The described control objectives initial value of each data acquisition time point forms described control objectives initial value curve in chronological order.
11. charge/discharge control methods as claimed in claim 10, is characterized in that:
In described light-preserved system target correction step, according to the capacity of described energy storage device and the information of charge-discharge electric power, determine the EQUILIBRIUM CALCULATION FOR PROCESS time range revising described control objectives initial value curve,
For EQUILIBRIUM CALCULATION FOR PROCESS time range described in each, calculate all described photovoltaic generation be positioned at above described control objectives initial value curve export probable value probability and, as upper probability and; And calculate all described photovoltaic generation be positioned at below described control objectives initial value curve export probable value probability and, as lower probability and,
The described control objectives initial value of data acquisition time last in EQUILIBRIUM CALCULATION FOR PROCESS time range described in each point is revised, with make described upper probability and with described lower probability and the absolute value of difference be less than predetermined setting, using the described control objectives value of revised described control objectives initial value as this data acquisition time point
Repeatedly perform described correction, obtain the described control objectives value of each acquisition time, form described control objectives value curve in chronological order by the described control objectives initial value of each data acquisition time point.
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| CN106364344A (en) * | 2016-09-19 | 2017-02-01 | 北京慧峰聚能科技有限公司 | Energy management method of electric automobile charging demand side distributed system |
| CN107054115A (en) * | 2017-01-19 | 2017-08-18 | 斑马信息科技有限公司 | Vehicular charging service system and its method |
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| CN117254464A (en) * | 2023-11-20 | 2023-12-19 | 又一新能源科技(苏州)有限公司 | Control method and system of energy storage system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106364344A (en) * | 2016-09-19 | 2017-02-01 | 北京慧峰聚能科技有限公司 | Energy management method of electric automobile charging demand side distributed system |
| CN106364344B (en) * | 2016-09-19 | 2018-12-25 | 北京双登慧峰聚能科技有限公司 | A kind of electric vehicle charge requirement side distributed system energy management method |
| CN107054115A (en) * | 2017-01-19 | 2017-08-18 | 斑马信息科技有限公司 | Vehicular charging service system and its method |
| CN107844925A (en) * | 2017-12-19 | 2018-03-27 | 天津大学 | Consider that electric automobile changes the active distribution network space truss project method of power mode |
| CN113497449A (en) * | 2020-04-06 | 2021-10-12 | 丰田自动车株式会社 | Power control system |
| CN117040091A (en) * | 2023-10-10 | 2023-11-10 | 国网天津市电力公司营销服务中心 | Photovoltaic power generation and electric vehicle charging station linkage system, method and device |
| CN117040091B (en) * | 2023-10-10 | 2023-12-29 | 国网天津市电力公司营销服务中心 | Photovoltaic power generation and electric vehicle charging station linkage system, method and device |
| CN117254464A (en) * | 2023-11-20 | 2023-12-19 | 又一新能源科技(苏州)有限公司 | Control method and system of energy storage system |
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