CN113690909A - Power allocation method and device for three-phase charging pile - Google Patents

Power allocation method and device for three-phase charging pile Download PDF

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Publication number
CN113690909A
CN113690909A CN202110862969.XA CN202110862969A CN113690909A CN 113690909 A CN113690909 A CN 113690909A CN 202110862969 A CN202110862969 A CN 202110862969A CN 113690909 A CN113690909 A CN 113690909A
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Prior art keywords
charging
phase
current
power
current value
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Chinese (zh)
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刘端成
吴雪弟
周昌
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Guochuang Mobile Energy Innovation Center Jiangsu Co Ltd
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Guochuang Mobile Energy Innovation Center Jiangsu Co Ltd
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Priority to CN202110862969.XA priority Critical patent/CN113690909A/en
Publication of CN113690909A publication Critical patent/CN113690909A/en
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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
    • H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60—Monitoring or controlling charging stations
    • B60L53/63—Monitoring or controlling charging stations in response to network capacity
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00036—Charger exchanging data with battery
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • 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
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/12—Electric charging stations
    • 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]
    • 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
    • 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
    • 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
    • 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
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention provides a power allocation method and a power allocation device for a three-phase charging pile, wherein the method comprises the following steps: acquiring a charging mode selected by a user according to a charging request of the user; when the charging mode is a quick charging mode, acquiring a first preset current, a second preset current, an input three-phase current value of the charging pile and a current running current value of the charging pile; calculating the available maximum charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operation current value and the three-phase balance attribute; and adjusting the charging power of the equipment to be charged according to the available maximum charging power. According to the power allocation method, the available maximum charging power of the three-phase charging pile can be accurately and effectively calculated, so that the charging power of the equipment to be charged can be dynamically adjusted in real time according to the available maximum charging power, the power utilization power is not over-limit, and the tripping risk is effectively avoided.

Description

Power allocation method and device for three-phase charging pile
Technical Field
The invention relates to the technical field of charging pile power distribution, in particular to a power allocation method and device for a three-phase charging pile.
Background
Under the background that environmental protection and energy supply are increasingly tense, the electric automobile industry in the field of new energy is rapidly developed. With the large-scale increase of the usage amount of electric automobiles, the existing charging station has the defects of shortage of resources, no electricity, charging, high charging cost and the like. If the charging pile enters thousands of households like household appliances, the electric vehicle owner can charge the electric vehicle as required.
In the related art, the full-load charging power of the alternating-current charging pile exceeds half of the power of a resident household power supply, and in the charging process, if a high-power household appliance is started, the overload trip risk exists.
Disclosure of Invention
The invention aims to solve the technical problems and provides a power allocation method of a three-phase charging pile, which can accurately and effectively calculate the available maximum charging power of the three-phase charging pile, and dynamically adjust the charging power of equipment to be charged in real time according to the available maximum charging power, so that the power utilization power is not over-limit, and the tripping risk is effectively avoided.
The technical scheme adopted by the invention is as follows:
a power allocation method of a three-phase charging pile comprises the following steps: acquiring a charging mode selected by a user according to a charging request of the user; when the charging mode is a quick charging mode, acquiring a first preset current, a second preset current, an input three-phase current value of the charging pile and a current running current value of the charging pile; calculating the available maximum charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operation current value and the three-phase balance attribute; and adjusting the charging power of the equipment to be charged according to the available maximum charging power.
The power allocation method of the three-phase charging pile comprises the following steps: when the charging mode is an economic charging mode, acquiring RTC time and peak-valley electricity utilization time; judging the current power utilization period of the three-phase charging pile according to the RTC time and the peak-valley power utilization time; if the three-phase charging pile is in the peak power period, charging the equipment to be charged with standard minimum charging power; and if the three-phase charging pile is currently in the valley electricity time period, calculating the available maximum charging power of the three-phase charging pile again, and adjusting the charging power of the equipment to be charged according to the calculated available maximum charging power.
Calculating the available maximum charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operation current value and the three-phase balance attribute comprises the following steps: when three-phase current is input and three-phase is balanced, judging whether the running current value is larger than the first preset current or not; if yes, calculating a first current value needing to be reduced, calculating a first available charging current of the three-phase charging pile according to the first current value, and calculating the available maximum charging power according to the first available charging current; if not, judging whether the running current value is smaller than the second preset current or not; if so, calculating a second current value needing to be increased, calculating a second available charging current of the three-phase charging pile according to the second current value, and calculating the available maximum charging power according to the second available charging current.
Calculating the available maximum charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operation current value and the three-phase balance attribute, and further comprising: when three phases of input three-phase current are unbalanced, judging whether the running current value is greater than the first preset current; if so, calculating a third current value needing to be reduced, calculating a third available charging current of the three-phase charging pile according to the third current value, and calculating the available maximum charging power according to the third available charging current; if not, judging whether the running current value is smaller than the second preset current or not; if so, calculating a fourth current value needing to be increased, calculating a fourth available charging current of the three-phase charging pile according to the fourth current value, and calculating the available maximum charging power according to the fourth available charging current.
A power blending device for a three-phase charging pile, comprising: the first acquisition module is used for acquiring a charging mode selected by a user according to a charging request of the user; the second acquisition module is used for acquiring a first preset current, a second preset current, an input three-phase current value of the charging pile and a current running current value of the charging pile when the charging mode is a quick charging mode; the calculation module is used for calculating the available maximum charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operation current value and the three-phase balance attribute; and the adjusting module is used for adjusting the charging power of the equipment to be charged according to the available maximum charging power.
A computer device comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, and when the processor executes the computer program, the power allocation method of the three-phase charging pile is realized.
A non-transitory computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the power allocation method of the three-phase charging pole described above.
The invention has the beneficial effects that:
the method and the device can accurately and effectively calculate the available maximum charging power of the three-phase charging pile, and dynamically adjust the charging power of the equipment to be charged in real time according to the available maximum charging power, so that the power utilization power is not over-limit, and the tripping risk is effectively avoided.
Drawings
Fig. 1 is a flowchart of a power allocation method of a three-phase charging pile according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a micro-grid system in units of household electricity consumption according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a power allocation apparatus according to an embodiment of the present invention;
fig. 4 is a block diagram illustrating a power distribution apparatus of a three-phase charging pile according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of a power allocation method of a three-phase charging pile according to an embodiment of the invention.
In the actual life, along with the enhancement of environmental protection consciousness and energy-saving consciousness of people, the electric automobile industry in the field of new energy is rapidly developed, the use amount of electric automobiles is increasing on a large scale, the resources of the existing charging stations are in short supply, and phenomena of no electricity, charging, high charging cost and the like occur. Under the condition that the existing power capacity is limited, the charging safety and the charging cost of the electric automobile become important consideration factors for charging the electric pile into thousands of households.
However, the full-load charging power of the alternating current charging pile at present exceeds half of the power of a resident household power supply, and in the charging process of an electric automobile, if a high-power household appliance is started, the overload trip risk exists.
Therefore, the invention provides a power allocation method of a three-phase charging pile, which can accurately and effectively calculate the available maximum charging power of the three-phase charging pile, and dynamically adjust the charging power of equipment to be charged in real time according to the available maximum charging power, so that the power consumption is not over-limit, and the tripping risk is effectively avoided.
Specifically, as shown in fig. 1, the power allocation method for a three-phase charging pile according to the embodiment of the present invention may include the following steps:
and S1, acquiring the charging mode selected by the user according to the charging request of the user.
According to one embodiment of the invention, the charging mode may include a fast charging mode and an economy charging mode.
And S2, when the charging mode is the quick charging mode, acquiring a first preset current, a second preset current, an input three-phase current value of the charging pile and a current running current value of the charging pile.
Specifically, as a possible implementation manner, the power allocation method for the three-phase charging pile according to the embodiment of the present invention may be applied to a micro-grid system using household electricity as a unit, where the micro-grid system may include a leakage protector 101, a voltage and current detection sensor 103, a household three-phase charging pile 104, a plurality of household appliances 105, a charging pile power allocation device 102, and the like, as shown in fig. 2. Wherein, earth-leakage protector 101 one end is connected public electric wire netting, and the domestic three-phase of connecting fills electric pile 104 and domestic appliance 105 in the other end. The voltage/current detection sensor 103 is mounted on a power supply line at the rear end of the earth leakage protector 101. The power adjusting device 102 collects the current operating power of the microgrid system in real time through the voltage and current detection sensor 103. The power allocation device 102 adjusts the charging power of the household three-phase charging pile 104 through a control method, so that the power utilization is not overloaded.
The first preset current can be used as a determination condition for power reduction charging, the value of the first preset current can refer to the rated current of the leakage protector 101, and the first preset current can be set through man-machine interaction, for example, if the rated current of the leakage protector 101 is 63A, the first preset current can be set to 63A. The second preset current can be used as a determination condition for boost charging, and the value of the second preset current can be set by human-computer interaction with reference to the rated current of the leakage protector 101 and the user scene requirements. For example, the rated current of the earth leakage protector 101 is 63A, and the application requirement takes the stable charging current as a consideration factor, then the second preset current may be set to be smaller, so that a larger power adjustment buffer area can be obtained, for example, when the second preset current is set to be 40A, and when the current running current is between 40A and 63A, the charging power of the device to be charged (for example, an electric vehicle) is kept stable; if the application requirement takes the available maximum charging current as a consideration factor, the second preset current may be close to the first preset current setting, so as to obtain a larger charging current, for example, the second preset current is set to 55A, when the current operating current is between 55A and 63A, the charging power of the device to be charged remains stable, the buffer area range is compressed, but a larger charging power can be obtained each time adjustment is performed.
And S3, calculating the available maximum charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the running current value and the three-phase balance attribute.
According to an embodiment of the present invention, calculating the available maximum charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operation current value and the three-phase balance attribute comprises: when three-phase current is input and three-phase is balanced, judging whether the running current value is greater than a first preset current or not; if so, calculating a first current value needing to be reduced, calculating a first available charging current of the three-phase charging pile according to the first current value, and calculating available maximum charging power according to the first available charging current; if not, judging whether the running current value is smaller than a second preset current or not; if yes, calculating a second current value needing to be increased, calculating a second available charging current of the three-phase charging pile according to the second current value, and calculating available maximum charging power according to the second available charging current.
Specifically, as a possible implementation, it may be determined whether the input three-phase current is balanced. If the input three-phase current is balanced, the input three-phase current value I is equal to (Ia + Ib + Ic)/3, wherein Ia, Ib and Ic represent the input three-phase current.
Further, whether the operation current value is larger than a first preset current is judged. If the operation current value is larger than the first preset current, the reduced first current value Id1 ═ I-I1+ (I1-I2)/2 ═ I- (I1+ I2)/2 is needed, wherein I1 is the first preset current, and I2 is the second preset current; the first available charging current Iv1 of the charging post is Ip-Id, where Ip is the operating current value.
Then, the available maximum charging power is calculated according to the first available charging current, wherein Pmax is 3 × U × Iv1 is 3 × U (Ip-I + (I1+ I2)/2), U is the single-phase ac voltage of the power grid, the chinese rating is 220V, and the european union country rating is 230V.
If the operating current value is less than the second preset current, an increased second current value Id2 ═ I2-I + (I1-I2)/2 ═ 1/2 × (I1+ I2) -I is required, and the second available charging current Iv2 of the charging post is ═ Ip + Id. Then, the available maximum power is calculated from the second available charging current, where Pmax-3 × U ═ Iv 2-3 × U × (Ip +1/2 × (I1+ I2) -I).
According to another embodiment of the present invention, calculating the maximum available charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operation current value and the three-phase balance attribute further includes: when three phases of input three-phase current are unbalanced, judging whether an operation current value is greater than a first preset current; if so, calculating a third current value needing to be reduced, calculating a third available charging current of the three-phase charging pile according to the third current value, and calculating available maximum charging power according to the third available charging current; if not, judging whether the running current value is smaller than a second preset current or not; if yes, calculating a fourth current value needing to be increased, calculating a fourth available charging current of the three-phase charging pile according to the fourth current value, and calculating the available maximum charging power according to the fourth available charging current.
Specifically, as another possible embodiment, if the three-phase currents are unbalanced, the three-phase currents may be compared to obtain a maximum value Imax and a minimum value Imin of the three-phase currents.
Further, whether the operation current value is larger than a first preset current is judged. If the operating current value is greater than the first preset current value, a reduced third current value Id3 ═ Imax-I1+ (I1-I2)/2 ═ Imax- (I1+ I2)/2 is required, and a third available charging current Iv3 ═ Ip-Id of the charging post.
Then, the available maximum charging power is calculated from the third available charging current, where Pmax3 ═ 3 × U × Iv3 ═ 3U × (Ip-Imax + (I1+ I2)/2).
If the operating current value is less than the second preset current, an increased fourth current value Id4 ═ I2-Imin + (I1-I2)/2 ═ 1/2 × (I1+ I2) -Imin is required, and a fourth available charging current Iv4 ═ Ip + Id of the charging post. Then, the available maximum power is calculated from the fourth available charging current, where Pmax ═ 3U × (Iv 4 ═ 3U × (Ip +1/2 × (I1+ I2) -Imin).
And S4, adjusting the charging power of the device to be charged according to the available maximum charging power.
After the available maximum charging power is calculated through the power allocation device, power data can be transmitted to the three-phase charging pile through remote communication, and the three-phase charging pile adjusts the charging power of the equipment to be charged after receiving the instruction. Therefore, the charging power of the electric automobile is dynamically adjusted according to the real-time power of the household micro-grid, and the power utilization overload tripping of the household micro-grid can be avoided.
Meanwhile, a power adjustment buffer area is further arranged, the equipment to be charged is charged with stable power in the buffer area, frequent adjustment of charging current of the equipment to be charged can be avoided, system stability is ensured, and the service lives of electronic components such as a three-phase charging pile and a charger of the equipment to be charged are prolonged.
According to an embodiment of the present invention, the power allocation method for a three-phase charging pile may further include the steps of: when the charging mode is the economic charging mode, acquiring RTC time and peak-valley electricity utilization time; judging the current electricity utilization period of the three-phase charging pile according to the RTC time and the peak-valley electricity utilization time; if the three-phase charging pile is in the peak power period, charging the equipment to be charged with the standard minimum charging power; and if the three-phase charging pile is currently in the valley electricity time period, calculating the available maximum charging power of the three-phase charging pile again, and adjusting the charging power of the equipment to be charged according to the calculated available maximum charging power.
Specifically, as shown in fig. 3, the power allocation apparatus may be divided into eight parts, namely, three-phase current sampling, three-phase voltage sampling, an MCU system, power calculation, a remote communication interface, storage (configuration information, fault record), human-computer interaction parameter setting, and an RTC clock. Three-phase current sampling and three-phase voltage sampling are connected into the MCU system, the MCU acquires available charging power of the charging pile through the power calculation unit, and data are transmitted to the three-phase charging pile through the remote communication interface. Important data information such as configuration information, fault information and the like is stored in an EEPROM of the MCU system and is permanently stored. The configuration information is set through the man-machine interaction module and stored in the EEPROM. The RTC clock circuit generates a standard Beijing clock for defining the peak-valley power consumption period.
The RTC time is standard time in Beijing, is generated by a high-precision clock chip arranged in the power adjusting device, is powered by a button battery, can ensure uninterrupted operation in power failure, and can be regularly calibrated through the Internet. The peak-valley electricity utilization time is a set of peak electricity time periods and valley electricity time periods, and can be set and permanently stored according to application scene requirements through a human-computer interaction interface of the power allocation device. As peak power period: [7:00:00, 20:59:59], valley power period: [21:00:00, 6:59:59], the data can be set according to application scenario requirements.
When the charging mode is the economic charging mode, the current electricity utilization period can be judged according to the RTC time and the peak-valley electricity utilization time through the power adjusting device.
As a possible implementation manner, if the three-phase charging pile is currently in the peak power period, the device to be charged is charged with a standard minimum charging power, where the standard minimum charging power is the minimum charging power that meets the relevant standard (for example, the minimum current required by the chinese standard is 6A).
As another possible implementation, if the three-phase charging pile is currently in the valley period, the available maximum charging power is calculated again, and the charging power of the device to be charged is adjusted according to the available maximum charging power.
Therefore, the equipment to be charged is charged at the minimum current specified by the standard in the peak power period, so that the charging pile is ensured not to be dormant or shut down, and after the peak power period, the charging is carried out at the maximum available charging power, so that the charging cost is greatly reduced.
In summary, according to the power allocation method for the three-phase charging pile of the embodiment of the invention, the charging mode selected by the user is obtained according to the charging request of the user, when the charging mode is the quick charging mode, the first preset current, the second preset current, the input three-phase current value of the charging pile and the current operating current value of the charging pile are obtained, the available maximum charging power of the three-phase charging pile is calculated according to the first preset current, the second preset current, the input three-phase current value, the operating current value and the three-phase balance attribute, and the charging power of the device to be charged is adjusted according to the available maximum charging power. Therefore, the available maximum charging power of the three-phase charging pile can be accurately and effectively calculated, the charging power of the equipment to be charged is dynamically adjusted in real time according to the available maximum charging power, the power utilization power is not over-limited, and the tripping risk is effectively avoided.
Corresponding to the embodiment, the invention further provides a power allocation device of the three-phase charging pile.
As shown in fig. 4, the power distribution apparatus for a three-phase charging pile according to an embodiment of the present invention may include: a first acquisition module 100, a second acquisition module 200, a calculation module 300 and an adjustment module 400.
The first obtaining module 100 is configured to obtain a charging mode selected by a user according to a charging request of the user; the second obtaining module 200 is configured to obtain a first preset current, a second preset current, an input three-phase current value of the charging pile, and a current operating current value of the charging pile when the charging mode is the fast charging mode; the calculation module 300 is configured to calculate the maximum available charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operation current value, and the three-phase balance attribute; the adjusting module 400 is configured to adjust the charging power of the device to be charged according to the available maximum charging power.
According to an embodiment of the invention, the adjusting module 400 is further configured to: when the charging mode is the economic charging mode, acquiring RTC time and peak-valley electricity utilization time; judging the current electricity utilization period of the three-phase charging pile according to the RTC time and the peak-valley electricity utilization time; if the three-phase charging pile is in the peak power period, charging the equipment to be charged with the standard minimum charging power; and if the three-phase charging pile is currently in the valley electricity time period, calculating the available maximum charging power of the three-phase charging pile again, and adjusting the charging power of the equipment to be charged according to the calculated available maximum charging power.
According to an embodiment of the present invention, the computing module 300 is specifically configured to: when three-phase current is input and three-phase is balanced, judging whether the running current value is greater than a first preset current or not; if so, calculating a first current value needing to be reduced, calculating a first available charging current of the three-phase charging pile according to the first current value, and calculating available maximum charging power according to the first available charging current; if not, judging whether the running current value is smaller than a second preset current or not; if yes, calculating a second current value needing to be increased, calculating a second available charging current of the three-phase charging pile according to the second current value, and calculating available maximum charging power according to the second available charging current.
According to an embodiment of the present invention, the calculating module 300 is further specifically configured to: when three phases of input three-phase current are unbalanced, judging whether an operation current value is greater than a first preset current; if so, calculating a third current value needing to be reduced, calculating a third available charging current of the three-phase charging pile according to the third current value, and calculating available maximum charging power according to the third available charging current; if not, judging whether the running current value is smaller than a second preset current or not; if yes, calculating a fourth current value needing to be increased, calculating a fourth available charging current of the three-phase charging pile according to the fourth current value, and calculating the available maximum charging power according to the fourth available charging current.
It should be noted that, in a more specific implementation manner of the power allocation apparatus for a three-phase charging pile according to the embodiment of the present invention, reference may be made to the above-mentioned embodiment of the power allocation method for a three-phase charging pile, and details are not described here again.
According to the power allocation device of the three-phase charging pile, the charging mode selected by a user is obtained through the first obtaining module according to the charging request of the user, the first preset current, the second preset current, the input three-phase current value of the charging pile and the current running current value of the charging pile are obtained through the second obtaining module when the charging mode is the quick charging mode, the available maximum charging power of the three-phase charging pile is calculated through the calculating module according to the first preset current, the second preset current, the input three-phase current value, the running current value and the three-phase balance attribute, and the charging power of the equipment to be charged is adjusted through the adjusting module according to the available maximum charging power. Therefore, the available maximum charging power of the three-phase charging pile can be accurately and effectively calculated, the charging power of the equipment to be charged is dynamically adjusted in real time according to the available maximum charging power, the power utilization power is not over-limited, and the tripping risk is effectively avoided.
The invention further provides a computer device corresponding to the embodiment.
The computer device of the embodiment of the invention comprises a memory, a processor and a computer program which is stored on the memory and can be run on the processor, and when the processor executes the program, the power allocation method of the three-phase charging pile of the embodiment is realized.
According to the computer equipment provided by the embodiment of the invention, the available maximum charging power of the three-phase charging pile can be accurately and effectively calculated, so that the charging power of the equipment to be charged can be dynamically adjusted in real time according to the available maximum charging power, the power utilization power is not over-limit, and the tripping risk is effectively avoided.
The invention also provides a non-transitory computer readable storage medium corresponding to the above embodiment.
The non-transitory computer readable storage medium of the embodiment of the present invention stores a computer program, and the computer program, when executed by a processor, implements the power allocation method for the three-phase charging pile.
According to the non-transitory computer readable storage medium provided by the embodiment of the invention, the available maximum charging power of the three-phase charging pile can be accurately and effectively calculated, so that the charging power of the equipment to be charged can be dynamically adjusted in real time according to the available maximum charging power, the power utilization power is not exceeded, and the tripping risk is effectively avoided.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The meaning of "plurality" is two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
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. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (7)

1. A power allocation method of a three-phase charging pile is characterized by comprising the following steps:
acquiring a charging mode selected by a user according to a charging request of the user;
when the charging mode is a quick charging mode, acquiring a first preset current, a second preset current, an input three-phase current value of the charging pile and a current running current value of the charging pile;
calculating the available maximum charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operation current value and the three-phase balance attribute;
and adjusting the charging power of the equipment to be charged according to the available maximum charging power.
2. The method of allocating power to a three-phase charging pile according to claim 1, further comprising the steps of:
when the charging mode is an economic charging mode, acquiring RTC time and peak-valley electricity utilization time;
judging the current power utilization period of the three-phase charging pile according to the RTC time and the peak-valley power utilization time;
if the three-phase charging pile is in the peak power period, charging the equipment to be charged with standard minimum charging power;
and if the three-phase charging pile is currently in the valley electricity time period, calculating the available maximum charging power of the three-phase charging pile again, and adjusting the charging power of the equipment to be charged according to the calculated available maximum charging power.
3. The method of claim 1, wherein calculating the maximum available charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operating current value, and a three-phase balance attribute comprises:
when three-phase current is input and three-phase is balanced, judging whether the running current value is larger than the first preset current or not;
if yes, calculating a first current value needing to be reduced, calculating a first available charging current of the three-phase charging pile according to the first current value, and calculating the available maximum charging power according to the first available charging current;
if not, judging whether the running current value is smaller than the second preset current or not;
if so, calculating a second current value needing to be increased, calculating a second available charging current of the three-phase charging pile according to the second current value, and calculating the available maximum charging power according to the second available charging current.
4. The power allocation method for three-phase charging piles according to claim 3, wherein the maximum available charging power of the three-phase charging pile is calculated according to the first preset current, the second preset current, the input three-phase current value, the operating current value and a three-phase balance attribute, and further comprising:
when three phases of input three-phase current are unbalanced, judging whether the running current value is greater than the first preset current;
if so, calculating a third current value needing to be reduced, calculating a third available charging current of the three-phase charging pile according to the third current value, and calculating the available maximum charging power according to the third available charging current;
if not, judging whether the running current value is smaller than the second preset current or not;
if so, calculating a fourth current value needing to be increased, calculating a fourth available charging current of the three-phase charging pile according to the fourth current value, and calculating the available maximum charging power according to the fourth available charging current.
5. The utility model provides a three-phase fills power blending device of electric pile which characterized in that includes:
the first acquisition module is used for acquiring a charging mode selected by a user according to a charging request of the user;
the second acquisition module is used for acquiring a first preset current, a second preset current, an input three-phase current value of the charging pile and a current running current value of the charging pile when the charging mode is a quick charging mode;
the calculation module is used for calculating the available maximum charging power of the three-phase charging pile according to the first preset current, the second preset current, the input three-phase current value, the operation current value and the three-phase balance attribute;
and the adjusting module is used for adjusting the charging power of the equipment to be charged according to the available maximum charging power.
6. Computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements the method for power allocation of a three-phase charging pole according to any one of claims 1 to 4.
7. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements the method of power allocation for a three-phase charging pole according to any one of claims 1 to 4.
CN202110862969.XA 2021-07-29 2021-07-29 Power allocation method and device for three-phase charging pile Pending CN113690909A (en)

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