CN108075536B - Flexible charging regulation and control method for charging pile and charging pile system - Google Patents
Flexible charging regulation and control method for charging pile and charging pile system Download PDFInfo
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- H02J13/0075—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H02J7/0022—
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/126—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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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
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- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/221—General power management systems
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/12—Remote or cooperative charging
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing
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Abstract
The invention discloses a flexible charging regulation and control method of a charging pile and a charging pile system, and particularly relates to a flexible charging regulation and control method of a charging pile and a charging pile system with a flexible charging regulation and control function. According to the invention, charging piles under a charging station or a special transformer are taken as units, and under the condition of meeting the regional charging load requirement, the charging piles under the charging station and the special transformer can be used for dispatching the load, so that the maximum power of the charging piles in the region is automatically balanced and regulated, the special transformer in the charging station is ensured not to be overloaded, and the ordered charging of the electric automobile and the safe and economic operation of a distribution network are realized.
Description
Technical Field
The invention relates to the technical field of electric vehicle charging, in particular to a flexible charging regulation and control method of a charging pile and a charging pile system.
Background
As an important approach of low-carbon traffic, electric automobiles become the focus of attention of scientific research institutions at home and abroad due to the advantages of high efficiency, low pollution and the like. Charging of a few electric vehicles does not bring much influence to the power grid, but large-scale access to the power grid brings challenges to normal operation and control of the power grid. The number of electric vehicles in China is estimated to reach 6000 million by 2030, calculated according to the charging power of 10 kilowatts/vehicle, and if the electric vehicles are charged simultaneously, the peak power reaches 5 hundred million kilowatts, so that the load of a power grid is increased sharply, and the operation and the control of the power grid are influenced. Due to the difference of users, the vehicle using behavior and the charging time of the electric vehicle user have larger uncertainty, so that the randomness of the charging load of the electric vehicle is large, and the control difficulty of a power grid is increased; a large number of electric automobiles are connected into a power grid, so that the load is increased, the load peak-valley difference of the power grid is increased, the peak load regulation difficulty of the power grid is increased, the load of a power system is increased, and the safety and reliability of the power grid are seriously influenced. In addition, the electric vehicle charging pile belongs to nonlinear equipment, and can generate larger harmonic pollution to a power supply system, so that the power factor is reduced, and the power supply quality is adversely affected; the charging of the electric automobile can quickly increase the load, investment and operation cost of the power distribution network, and simultaneously generate the problems of voltage loss, three-phase imbalance and the like.
Therefore, the influence of electric vehicle charging on the load of the power grid needs to be researched, corresponding measures are taken according to specific influences, and an ordered charging method is implemented so as to adapt to the large-scale development of electric vehicles. The influence of electric automobile charging on the electric wire netting load mainly has following two aspects, is the influence to the distribution network on the one hand: charging of the electric automobile in the peak period of power utilization can have important influence on load balance, three-phase balance and voltage regulation of the power distribution network, so that the problems of overload, loss increase, voltage drop and overload of a power distribution transformer of the power distribution network are caused, and the effectiveness and reliability of power grid operation can be reduced. Another aspect is the impact on the quality of the power: the electric automobile adopts on-vehicle or off-vehicle power electronic charging equipment, carries out the charge-discharge operation of two-way conversion, consequently produces harmonic pollution easily, destroys the electric energy quality, especially uses electric peak period, can aggravate power supply system burden.
Because electric automobile charges and belongs to emerging trade, the technique is not mature enough at present, and ordinary electric pile that fills does not have flexible charging power regulation and control function moreover, can only realize basic charging function.
Disclosure of Invention
The object of the present invention is to solve at least one of the above mentioned problems.
According to a first aspect of the present invention, a flexible charging regulation and control method for a charging pile is provided, the method includes a plurality of charging piles, the plurality of charging piles are connected through a wireless network, and the method specifically includes the following steps:
1) setting one charging pile in a plurality of charging piles as a master control device and the other charging piles as controlled devices in a regulation and control period;
2) the main control equipment collects the actual power data of the plurality of charging piles, and calculates according to the actual power data of the plurality of charging piles to obtain the real-time total power P of the charging pilesCharger peg (actual)；
3) Judging the total power P of the real-time charging pileCharger peg (actual)Whether it is higher than rated power of transformer
PTransformer (rating)；
If yes, executing the steps 4) -5), and if not, returning to the step 2);
4) adjusting the maximum power of the plurality of charging piles;
5) judging whether the current regulation and control period is finished or not;
if not, returning to the step 2);
if so, ending the current regulation and control period and starting a new regulation and control period.
Compared with the prior art, the flexible charging regulation and control method of the charging pile takes the charging pile under the charging station or the special transformer as a unit, the charging pile in the charging station and the special transformer can regulate the load under the condition of meeting the regional charging load requirement, the maximum power of the charging pile in the region is automatically balanced and regulated, the special transformer in the charging station is ensured not to be overloaded, and the ordered charging of the electric automobile and the safe and economic operation of a distribution network are realized.
In some embodiments, in step 2), the charging piles monitor their own power data in real time, and the charging piles transmit and receive data via a wireless cellular network (ZigBee).
In some embodiments, the controlled device comprises a relay device and a slave device; the main control equipment collects the actual power data of the plurality of charging piles and comprises the following steps: the slave equipment monitors the actual power data of the slave equipment and transmits the actual power data of the slave equipment to the master control equipment through the relay equipment or directly transmits the actual power data of the slave equipment to the master control equipment; and the relay equipment transmits the actual power data of the relay equipment and the actual power data transmitted by the slave equipment to the master control equipment together.
In some embodiments, the step 4) specifically comprises: the main control equipment issues an operation instruction for flexible charging regulation and control; and after the controlled equipment checks that the main control equipment issues an operation instruction for flexible charging regulation, the maximum power of the charging pile is adjusted.
Preferably, in a new regulation and control period, any controlled device in a previous regulation and control period is used as a master control device, and the master control device in the previous regulation and control period is used as a controlled device, and the steps are continuously repeated.
To achieve the object of the invention, a second party according to the invention is conceived as the same inventive conceptThe charging pile system with the flexible charging regulation function comprises a plurality of charging piles, wherein the plurality of charging piles are connected through a wireless network; in a regulation and control period, one charging pile in the plurality of charging piles is a master control device, and the other charging piles are controlled devices; the master control equipment is used for monitoring the actual power data of the master control equipment in real time, collecting the actual power data of the controlled equipment, and calculating to obtain the real-time total power P of the charging pile according to the actual power data of the master control equipment and the controlled equipmentCharger peg (actual)And according to the total power P of the charging pileCharger peg (actual)And judging whether to adjust the maximum power of the plurality of charging piles.
In some embodiments, the master device and the controlled device have a function of monitoring own power data in real time, and data transmission and reception are performed between the master device and the controlled device through a wireless cellular network (ZigBee).
In some embodiments, the controlled device comprises a relay device and a slave device, and the slave device is used for monitoring the actual power data of the slave device in real time and transmitting the actual power data of the slave device to the master device through the relay device or directly transmitting the actual power data of the slave device to the master device; the relay device is used for monitoring the actual power data of the relay device in real time and transmitting the actual power data of the relay device and the actual power data transmitted from the slave device to the master control device.
In some embodiments, the total power P according to the charging pileCharger peg (actual)Judging whether to carry out and to fill the maximum power of electric pile and adjusting specifically includes: when charging pile total power PCharger peg (actual)Rated power P of transformerTransformer (rating)Then, the maximum power of each charging pile in the region is adjusted downwards; when charging pile total power PCharger peg (actual)Rated power P of transformerTransformer (rating)And in time, the maximum power of each charging pile is not adjusted.
In some embodiments, in the current regulation and control cycle, any one of the controlled devices in the previous regulation and control cycle is used as the master device, and the master device in the previous regulation and control cycle is used as the controlled device.
Compared with the prior art, the charging pile systems of the multiple embodiments monitor the charging power of the charging pile in real time through the mutual ad-hoc network communication of the charging piles, automatically control the charging power of the pile body, and enable the sum P of the power values of the charging piles in the area to be equal to that of the charging pile power valuesCharger peg (actual)< rated power P of transformerTransformer (rating)The electric automobile charging system realizes ordered charging and flexible control, and reduces the influence of the charging behavior of the electric automobile on the power distribution network.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a flexible charging control method of a charging pile according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a charging pile module according to an embodiment of the invention;
fig. 3 is a schematic diagram of a charging pile system with a flexible charging regulation function according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a flexible charge equalization control method according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a charging station and charging pile framework under a special transformer according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a charging pile component module according to an embodiment of the invention;
fig. 7 is a schematic diagram of a charging pile regulation and control terminal module in the embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials. In addition, the structure of a first feature described below as "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.
In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through an intermediate medium, and the specific meanings of the terms as described above will be understood by those skilled in the art according to the specific situation.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited correspondingly. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
The detailed description is made below with reference to the accompanying drawings to describe embodiments according to the present invention.
Fig. 1 is a flowchart of a flexible charging regulation and control method for a charging pile according to an embodiment of the present invention, where the flexible charging regulation and control method for a charging pile is applicable to charging of a charging pile of an electric vehicle charging station, the electric vehicle charging station uses a special transformer, the rated capacity of the special transformer is known, and the load type under the special transformer is only connected to the charging pile. Connect a plurality of electric pile that fill in this electric automobile charging station, through wireless network connection between a plurality of electric pile that fill.
Specifically, in the embodiment of the invention, the flexible charging regulation and control method of the charging pile comprises the following steps:
1) setting one charging pile in a plurality of charging piles as a master control device and the other charging piles as controlled devices in a regulation and control period;
2) the main control equipment collects the actual power data of the plurality of charging piles, and calculates according to the actual power data of the plurality of charging piles to obtain the real-time total power P of the charging pilesCharger peg (actual)；
3) Judging the total power P of the real-time charging pileCharger peg (actual)Whether it is higher than rated power of transformer
PTransformer (rating)；
If yes, executing the steps 4) -5), and if not, returning to the step 2);
4) adjusting the maximum power of the plurality of charging piles;
5) judging whether the current regulation and control period is finished or not; if not, returning to the step 2); if so, ending the current regulation and control period and starting a new regulation and control period.
The time length of the one regulation and control period is specifically set according to the actual regulation and control condition.
In one embodiment of the present invention, preferably, the charging piles can monitor their own power data in real time, and the charging piles transmit and receive data to and from each other through a wireless cellular network (ZigBee). ZigBee is a wireless connection, can work on 3 frequency bands of 2.4GHz (popular global), 868MHz (popular European) and 915 MHz (popular United states), respectively has the highest transmission rates of 250kbit/s, 20kbit/s and 40kbit/s, and the transmission distance of the ZigBee is within the range of 10-75m, but can be increased continuously. ZigBee has the characteristics of low power consumption, low cost, short time delay, large network capacity, reliability, safety and the like.
In this embodiment, the functional modules of the charging pile are shown in fig. 2, and specifically include a charging billing unit, a charging controller, and a charging power supply module, and the flexible charging regulation and control method of the present embodiment is developed based on the billing control unit in the charging pile, where the charging billing unit, the charging controller, and the charging power supply module sequentially establish connection and communication through a CAN bus. The step 4) of adjusting the maximum power of the plurality of charging piles is to specifically enable the charging controller to control the charging module to adjust the power by sending an instruction through the charging and billing unit.
In one embodiment of the present invention, the controlled device preferably includes a relay device and a slave device, and the purpose of the controlled device is to avoid direct long-distance wireless transmission, and improve the reliability and stability of data transmission through relay transition.
In this embodiment, the collecting, by the master control device, actual power data of the plurality of charging piles includes: the slave equipment monitors the actual power data of the slave equipment and transmits the actual power data of the slave equipment to the master control equipment through the relay equipment or directly transmits the actual power data of the slave equipment to the master control equipment; and the relay equipment transmits the actual power data of the relay equipment and the actual power data transmitted by the slave equipment to the master control equipment together.
In an embodiment of the present invention, preferably, the step 4) specifically includes: the main control equipment issues an operation instruction for flexible charging regulation and control; and after the controlled equipment checks that the main control equipment issues an operation instruction for flexible charging regulation, the maximum power of the charging pile is adjusted.
In this embodiment, a balance control method is adopted to flexibly regulate and control all charging piles, and includes a main control device and a controlled device, the principle of the balance control method is shown in fig. 4, and specifically, the balance control method refers to reduction and adjustment of the maximum power of all charging piles according to the same proportion.
In an embodiment of the present invention, preferably, in a new regulation period, any controlled device in a previous regulation period is used as a master device, and a master device in a previous regulation period is used as a controlled device, and this is continuously performed in a loop.
According to the flexible charging regulation and control method of the charging pile, the charging pile under the charging station or the special transformer is taken as a unit, the charging pile under the charging station and the special transformer can be used for regulating the load under the condition of meeting the regional charging load requirement, the maximum power of the charging pile in the region is automatically balanced and regulated, the special transformer in the charging station is prevented from being overloaded, and the ordered charging of the electric automobile and the safe and economic operation of a distribution network are realized.
Fig. 3 is a schematic diagram of a charging pile wireless ad hoc network system with a flexible charging regulation function in a regulation and control cycle of a charging pile system according to another embodiment of the present invention. The charging pile system with the flexible charging regulation and control function is suitable for charging of a charging pile of an electric automobile charging station, the electric automobile charging station uses a special transformer, the rated capacity of the special transformer is known, and the load type under the special transformer is only connected with the charging pile. As can be seen from fig. 3, in this embodiment, the system includes a plurality of charging piles, and the plurality of charging piles establish a connection with each other through a wireless cellular network (ZigBee).
In a regulation and control period, one charging pile in the plurality of charging piles is a master control device, and the other charging piles are controlled devices; the master control equipment monitors the actual power data of the master control equipment in real time, collects the actual power data of the controlled equipment, and obtains the real-time total power P of the charging pile through calculation according to the actual power data of the master control equipment and the actual power data of the controlled equipmentCharger peg (actual)And according to the total power P of the charging pileCharger peg (actual)And judging whether to adjust the maximum power of the plurality of charging piles.
In an embodiment of the present invention, preferably, the master device and the controlled device have a function of monitoring own power data in real time, and data transmission and reception are performed between the master device and the controlled device through a wireless cellular network (ZigBee).
In an embodiment of the present invention, preferably, the controlled device includes a relay device and a slave device, and the slave device monitors actual power data of itself in real time and transmits the actual power data of itself to the master device through the relay device or directly to the master device; the relay device monitors the actual power data of the relay device in real time and transmits the actual power data of the relay device and the actual power data transmitted from the slave device to the master control device.
In an embodiment of the present invention, preferably, the charging pile total power P is usedCharger peg (actual)Judging whether to carry out and to fill the maximum power of electric pile and adjusting specifically includes: when charging pile total power
PCharger peg (actual)Rated power P of transformerTransformer (rating)Then, the maximum power of each charging pile in the region is adjusted downwards; when charging pile total power PCharger peg (actual)Rated power P of transformerTransformer (rating)And in time, the maximum power of each charging pile is not adjusted.
In an embodiment of the present invention, preferably, in the current regulation and control cycle, any controlled device in the previous regulation and control cycle is used as the master control device to make the regulation and control policy determination, and the master control device in the previous regulation and control cycle is used as the controlled device.
In one embodiment of the invention, preferably, each charging pile is allocated with a code, and when the charging piles are newly added in an area, the master control equipment can automatically join the ad hoc network system as long as the charging pile codes are allocated according to rules. An ad hoc network is described below with reference to an actual case, for example, 9000540035 is a single-gun dc pile of futian lotus mountain 60kw, and before each charging pile comes online, a unique pile code is set in a charging control unit in the charging pile to identify identity information of the charging pile. If the newly added stake is set to 9000770032, it will not be able to join the system if it does not belong to the stake assigned to the site. When the charging pile is reduced or fails, the system can generate corresponding fault messages, the charging pile can be automatically isolated according to the fault messages, the charging pile is forbidden to start charging, and after normal maintenance is waited, the isolation state is removed.
The charging pile comprises a power unit, a charging pile control terminal module, a charging controller, a meter, a charging interface and a human-computer interaction interface, wherein the charging interface is preferably a charging gun.
Specifically, the charging pile control terminal module is a charging pile control charging device, is connected with an electrical part as shown in fig. 7, and is mainly controlled through a CAN bus. The charging pile regulation and control terminal module has the functions of charging and settlement in names, human-computer interface display, multifunctional electric meter interaction, 3G/4G vehicle networking platform interaction, charging equipment controller interaction and the like. This fill electric pile regulation and control terminal module mainly realizes the function and has: 1. the payment mode can be selected from card swiping payment and other network payment modes such as WeChat payment. 2. The expense measurement fills electric pile regulation and control terminal module and links to each other electric automobile through 485 interfaces and strapping table and charge required electric quantity and all need gather and fill electric pile regulation and control terminal module. The flexible charging regulation and control method of the charging pile in the methods and the systems in the embodiments is realized in the device.
In an embodiment of the present invention, as shown in fig. 5, the method for performing flexible charging regulation and control on the charging pile of the present invention is applied to the implementation of the charging pile under a special transformer charging station, specifically, in this charging station, the load type under the special transformer is only connected to the charging pile. Fig. 5 shows a plurality of charging piles installed on a dedicated transformer in one area, and in the embodiment of the present invention, a regulation area is distinguished by allocating a charging code in a background.
In the specific embodiment, a charging pile with a flexible charging regulation and control strategy method is installed below a charging station or a single special transformer, the rated capacity of the special transformer is known, the rated capacity of a dry-type transformer is 800KVA, and on the premise that the special transformer is only connected with the charging pile, the power consumption of the charging pile is divided into a 7kW low-power alternating current charging pile and a 60kW direct current charging pile.
Therefore, the maximum power available for charging of the charging station is:
P(Max)=（800KVA*0.9）*0.8=720*0.8=576kW
If the charging pile with the flexible charging regulation and control strategy method is not installed, the number of the charging piles capable of being electrified to operate can only be estimated and calculated when the charging pile is installed, and at most 9 60kW direct current charging piles can be installed in the area to start charging.
If the installation takes the flexible electric pile that fills of regulation and control strategy, can install 12 at least 60kW direct current and fill electric pile and start charging, if 12 fill electric pile and start charging simultaneously, when detecting and fill electric pile power value sum PCharger peg (actual)Rated power P of transformerTransformer (rating)According to the balance control method, the charging pile is flexibly regulated, the maximum power of all the charging piles is uniformly regulated, the rated power of the charging pile is reduced to 80% according to calculation by using the flexible charging balance control method of the charging pile, the principle of the method of the flexible charging balance control method of the charging pile is shown in figure 4, and after the flexible charging balance control, the actual power of the charging pile is as follows:
Pcharger peg (actual)= PTransformer (load)=(60Kw*12)*80%=576Kw
Therefore, after the method or the system disclosed by the invention is used, the charging is started simultaneously by a plurality of charging piles, and the actual load of the transformer can be effectively reduced under the condition that the power of the charging piles exceeds the rated power of the transformer, so that the safe and economic operation of a distribution network is ensured. According to the embodiment of the invention, the charging piles under the charging station or the special transformer are taken as units, and the charging piles under the charging station and the special transformer can schedule loads under the condition of meeting the regional charging load requirement, so that the maximum power of the charging piles in the region is automatically balanced and adjusted, the special transformer in the charging station is ensured not to be overloaded, and the ordered charging of the electric automobile and the safe and economic operation of a distribution network are realized.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. A flexible charging regulation and control method of a charging pile is suitable for charging of the charging pile of an electric vehicle charging station, the electric vehicle charging station uses a special transformer for power supply, the electric vehicle charging station comprises a plurality of charging piles, the load type of the special transformer is only connected with the plurality of charging piles, and the plurality of charging piles are connected through a wireless cellular network, and the method is characterized by comprising the following steps:
step 1) setting one charging pile in a plurality of charging piles as a master control device and the other charging piles as controlled devices in a regulation and control period; the controlled equipment comprises relay equipment and slave equipment;
step 2) the main control equipment collects the actual power data of the plurality of charging piles, and the real-time total power P of the charging piles is obtained through calculation according to the actual power data of the plurality of charging pilesCharger peg (actual)(ii) a The charging piles monitor actual power data of the charging piles in real time, and data are transmitted and received among the charging piles through a wireless cellular network; the charging pile serving as the slave equipment transmits actual power data of the charging pile to the master control equipment through the relay equipment; the charging pile serving as the relay equipment transmits the actual power data of the charging pile and the actual power data transmitted by the slave equipment connected with the charging pile to the main control equipment;
step 3) judging the total power P of the real-time charging pileCharger peg (actual)Whether it is greater than rated power P of transformerTransformer (rating)；
If yes, executing steps 4) -5);
if not, returning to the step 2);
step 4) adjusting the maximum power of the plurality of charging piles; the main control equipment issues an operation instruction for flexible charging regulation and control; after the controlled equipment receives an operating instruction for flexible charging regulation and control issued by the main control equipment, the maximum power of the charging pile is adjusted;
step 5) judging whether the current regulation and control period is finished or not;
if not, returning to the step 2);
if so, ending the current regulation and control cycle and starting a new regulation and control cycle; in the new regulation and control cycle, any controlled device in the previous regulation and control cycle is used as a master control device, and the master control device in the previous regulation and control cycle is used as a controlled device.
2. A charging pile system with flexible charging regulation function is suitable for charging the charging piles of an electric vehicle charging station, the electric vehicle charging station uses a special transformer for supplying power, the electric vehicle charging station comprises a plurality of charging piles, the load type of the special transformer is only connected with the plurality of charging piles, the plurality of charging piles are connected through a wireless cellular network, the charging pile system is characterized in that,
in a regulation and control period, one charging pile in the plurality of charging piles is a master control device, and the other charging piles are controlled devices; the master control device and the controlled device have the function of monitoring own power data in real time, and data transmission and reception are carried out between the master control device and the controlled device through a wireless cellular network; the controlled equipment comprises relay equipment and slave equipment, wherein the charging pile serving as the slave equipment transmits actual power data of the charging pile to the master control equipment through the relay equipment; the charging pile serving as the relay equipment transmits the actual power data of the charging pile and the actual power data transmitted by the slave equipment connected with the charging pile to the main control equipment;
in a regulation and control period, the master control device is used for monitoring the actual power data of the master control device in real time, collecting the actual power data of the controlled device, and calculating to obtain the real-time total power P of the charging pile according to the actual power data of the master control device and the controlled deviceCharger peg (actual)And according to chargingTotal power P of electric pileCharger peg (actual)Judging whether to adjust the maximum power of the plurality of charging piles or not; wherein, when charging pile total power PCharger peg (actual)Rated power P of transformerTransformer (rating)Then, the maximum power of each charging pile in the region is adjusted downwards; when charging pile total power PCharger peg (actual)Rated power P of transformerTransformer (rating)In the process, the maximum power of each charging pile is not adjusted;
in the current regulation and control cycle, any controlled device in the previous regulation and control cycle is used as a master control device, and the master control device in the previous regulation and control cycle is used as a controlled device.
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| CN108879738A (en) * | 2018-06-21 | 2018-11-23 | 深圳市盛弘电气股份有限公司 | A kind of three-phase imbalance regulating system and method |
| CN109204036B (en) * | 2018-09-11 | 2020-07-03 | 国网智能科技股份有限公司 | Charging pile ordered charging management method and system |
| CN111409496B (en) * | 2019-09-29 | 2021-03-26 | 佛山科学技术学院 | Method and device for inhibiting distribution transformer overload in electric vehicle charging station |
| CN110979084B (en) * | 2019-12-31 | 2021-07-23 | 南方电网电力科技股份有限公司 | Charging control method, system and device for electric vehicle charging station |
| CN111301214A (en) * | 2020-03-06 | 2020-06-19 | 佳源科技有限公司 | Electric automobile ordered charging control method and system |
| CN111342481B (en) * | 2020-03-11 | 2021-01-26 | 佛山科学技术学院 | Charging station distribution transformer overload protection method and system based on energy storage |
| CN112208377B (en) * | 2020-09-30 | 2022-03-15 | 重庆长安新能源汽车科技有限公司 | Household alternating current charging pile, system and charging method |
| CN113602131B (en) * | 2021-09-08 | 2023-06-02 | 中能瑞通（北京）科技有限公司 | Ordered charging and discharging method for electric automobile based on optimizing power quality of distribution transformer area |
| CN114142500A (en) * | 2021-10-19 | 2022-03-04 | 威胜信息技术股份有限公司 | Ordered charging control method and device suitable for alternating current charging pile |
| CN117175603B (en) * | 2023-08-24 | 2024-07-02 | 瀚能光储(广东)新能源科技有限公司 | Intelligent scheduling method for charging pile ad hoc network |
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