CN113386607B - Charging station charging and discharging automatic balancing method and device and charging station - Google Patents
Charging station charging and discharging automatic balancing method and device and charging station Download PDFInfo
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- CN113386607B CN113386607B CN202110578518.3A CN202110578518A CN113386607B CN 113386607 B CN113386607 B CN 113386607B CN 202110578518 A CN202110578518 A CN 202110578518A CN 113386607 B CN113386607 B CN 113386607B
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- 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
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- 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
- B60L53/50—Charging stations characterised by energy-storage or power-generation means
-
- 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
- B60L53/50—Charging stations characterised by energy-storage or power-generation means
- B60L53/53—Batteries
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- 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
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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
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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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- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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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
- 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
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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
- 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
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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
- Y02T90/12—Electric charging stations
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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 application discloses a charging station charging and discharging automatic balancing method, a charging station charging and discharging automatic balancing device and a charging station, wherein the relation between power supply and power consumption can be judged according to the voltage state of a local power grid (charging station), and meanwhile, the self charging and the external discharging are carried out according to the judgment of the energy storage state of an energy storage assembly. This application has set for several kinds of voltage state grades to local electric wire netting (charging station) voltage state and energy storage component's energy storage state, adjusts energy storage component in real time according to different state grades and carries out the energy storage or discharge to adjust the power supply and the power consumption balance of local electric wire netting (charging station), effectively alleviate the power supply pressure of peak period electric wire netting. According to the method and the device, the difference state of power utilization and power supply can be judged more accurately, the supply and demand relation of a local power grid (charging station) is balanced according to the actual difference condition and the energy storage state of the energy storage assembly, and the vehicle charging requirement of the charging station is met.
Description
Technical Field
The application relates to the technical field of charging stations, in particular to a charging station charging and discharging automatic balancing method and device and a charging station.
Background
For a long time, due to the fact that social electricity demand is large, the power supply capacity of a power grid in an electricity utilization peak period is insufficient, a national power grid divides the electricity utilization peak period and the electricity utilization valley period according to the rule that social electricity is required in different periods, civil electric energy is encouraged to output electric energy to the power grid in the electricity utilization peak period to supplement power supply, and electricity charges are reduced in the electricity utilization valley period to balance the supply and demand difference of the power grid.
In order to meet the requirement of increasing the charging speed of the electric automobile, the society starts to research and develop high-power charging. High-power charging requires high power, and particularly during the peak period of charging of a plurality of vehicles at the same time, the required power is very high, so that great power supply pressure is brought to a local power grid.
Therefore, it is desirable to provide a technical solution capable of relieving the local grid power supply pressure.
Disclosure of Invention
The application provides a charging station charge-discharge automatic balancing method which is applied to a charging station, wherein the charging station comprises a wiring component, an electric energy bidirectional conversion component, an energy storage component and a monitoring and control component, one end of the electric energy bidirectional conversion component is connected with the low-voltage side of a transformer through the wiring component, and the high-voltage side of the transformer is connected with an external power grid;
the method comprises the following steps:
monitoring a first working voltage of a transformer connected with a charging station and state parameters of an energy storage assembly in the charging station in real time by configuring a monitoring and control assembly in the charging station;
comparing the first working voltage with a preset grid voltage threshold;
comparing the state parameter with a preset energy storage threshold value, wherein the preset energy storage threshold value comprises a preset first state threshold value;
when the first working voltage is smaller than a preset power grid voltage threshold value and the state parameter is higher than the preset first state threshold value, the monitoring and control component sends a transformer power supply signal to an electric energy bidirectional conversion component connected between the transformer and the energy storage component to control the electric energy bidirectional conversion component to be in a first power supply mode, so that the energy storage component supplies power to a power grid corresponding to the transformer to improve the first working voltage of the transformer.
Further, still include:
when the first working voltage is larger than the preset grid voltage threshold or the state parameter is lower than the preset first state threshold, the monitoring and control component sends a power supply stopping signal to the electric energy bidirectional conversion component to control the electric energy bidirectional conversion component to be disconnected, so that the energy storage component stops supplying power to the transformer.
Further, the preset energy storage threshold value also comprises a preset second state threshold value, and the preset second state threshold value is smaller than the preset first state threshold value;
the method further comprises the following steps:
when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset second state threshold value, the monitoring and control assembly sends a charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a forced charging mode, so that a power grid connected with the transformer charges the energy storage assembly.
Further, still include:
when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset first state threshold and higher than a preset second state threshold, and the first working voltage is lower than a preset grid voltage threshold, the monitoring and control assembly sends a power supply stopping signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be disconnected, so that the energy storage assembly stops charging.
Further, still include:
when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset first state threshold and higher than a preset second state threshold, and the first working voltage is higher than a preset grid voltage threshold, the monitoring and control assembly sends a charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a first charging mode, so that the electric energy assembly is charged by a grid connected with the transformer.
Further, still include:
when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset first state threshold and higher than a preset second state threshold, and the first working voltage is higher than a preset grid voltage threshold, the monitoring and control assembly sends a charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a second charging mode, so that the electric grid connected with the transformer is full of electricity for the energy storage assembly.
The charging station further comprises a charging cabinet, one end of the charging cabinet is connected with the wiring assembly, and the other end of the charging cabinet is used for connecting a charging vehicle;
the method further comprises the following steps:
when the first working voltage is larger than a preset power grid voltage threshold value and smaller than the rated voltage of an external power grid, and the state parameter is higher than the preset first state threshold value, the monitoring and control assembly sends a vehicle charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a second power supply mode, so that the energy storage assembly supplies power to the charging vehicle.
Further, the preset grid voltage threshold is determined according to the rated voltage of the external power grid.
On the other hand, the invention provides a charging station charge-discharge automatic balancing device which is applied to a charging station, wherein the charging station comprises a wiring component, an electric energy bidirectional conversion component, an energy storage component and a monitoring and control component, one end of the electric energy bidirectional conversion component is connected with the low-voltage side of a transformer through the wiring component, and the high-voltage side of the transformer is connected with an external power grid;
the device comprises:
the charging system comprises a working voltage acquisition module, a charging station and a charging station control module, wherein the working voltage acquisition module is configured to monitor a first working voltage of a transformer connected with the charging station and a state parameter of an energy storage component in the charging station in real time through configuring a monitoring and control component in the charging station;
a first comparison module configured to perform a comparison of the first operating voltage with a preset grid voltage threshold;
a second comparison module configured to perform a comparison of the state parameter with a preset energy storage threshold, the preset energy storage threshold comprising a preset first state threshold;
the power supply module is configured to execute that when the first working voltage is smaller than a preset grid voltage threshold and the state parameter is higher than the preset first state threshold, the monitoring and control component sends a transformer power supply signal to an electric energy bidirectional conversion component connected between the transformer and the energy storage component to control the electric energy bidirectional conversion component to be in a first power supply mode, so that the energy storage component supplies power to a grid corresponding to the transformer to increase the first working voltage of the transformer.
In another aspect, the invention provides a charging station, which comprises a wiring component, an electric energy bidirectional conversion component, an energy storage component and a monitoring and control component, wherein one end of the electric energy bidirectional conversion component is connected with the low-voltage side of a transformer through the wiring component, and the high-voltage side of the transformer is connected with an external power grid;
the charging station can execute the charging station charging and discharging automatic balancing method.
According to the charging station charging and discharging automatic balancing method and device and the charging station, the relation between power supply and power consumption can be judged according to the voltage state of a local power grid (charging station), and meanwhile, self charging and external discharging are carried out according to the judgment of the energy storage state of the energy storage assembly. This application has set for several kinds of voltage state grades to local electric wire netting (charging station) voltage state and energy storage component's energy storage state, adjusts energy storage component in real time according to different state grades and carries out the energy storage or discharge to adjust the power supply and the power consumption balance of local electric wire netting (charging station), effectively alleviate the power supply pressure of peak period electric wire netting. This application compares discharging outward and charging to self with current energy storage component according to the electricity consumption peak period and the electricity consumption low ebb period that national grid passed through social electricity consumption custom division, and this application can be more accurate the difference state of judgement power consumption and power supply to according to actual difference situation and energy storage component self energy storage state come the supply and demand relation of balanced local electric wire netting (charging station), satisfy the charging station vehicle demand of charging.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 application, 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 charging station charge-discharge automatic balancing method according to an embodiment of the present disclosure;
fig. 2 is a flowchart of another charging station charge-discharge automatic balancing method according to an embodiment of the present disclosure;
fig. 3 is a flowchart of another charging station charge-discharge automatic balancing method according to an embodiment of the present disclosure;
fig. 4 is a flowchart of another charging station charge-discharge automatic balancing method according to an embodiment of the present disclosure;
fig. 5 is a flowchart of yet another charging station charge-discharge automatic balancing method according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an automatic charging and discharging balancing apparatus for a charging station according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a charging station according to an embodiment of the present disclosure;
fig. 8 is a hardware structural diagram of an apparatus for implementing the method provided in the embodiment of the present application.
710-a working voltage acquisition module, 720-a first comparison module, 730-a second comparison module and 740-a power supply module.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all 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 application.
In the description of the present application, it is to be understood that 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, the first and second features defined may explicitly or implicitly include one or more of the features. Moreover, the terms first, second, etc. are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The invention provides a charging station charge-discharge automatic balancing method, please refer to fig. 1, fig. 1 is a flow chart of the charging station charge-discharge automatic balancing method provided by the embodiment of the application, the method can be applied to a charging station, the charging station comprises a wiring component, an electric energy bidirectional conversion component, an energy storage component and a monitoring and control component, one end of the electric energy bidirectional conversion component is connected with a low-voltage side of a transformer through the wiring component, and a high-voltage side of the transformer is connected with an external power grid;
the method comprises the following steps:
s102, monitoring a first working voltage of a transformer connected with a charging station and state parameters of an energy storage assembly in the charging station in real time by configuring a monitoring and control assembly in the charging station;
s104, comparing the first working voltage with a preset grid voltage threshold;
s106, comparing the state parameter with a preset energy storage threshold value, wherein the preset energy storage threshold value comprises a preset first state threshold value;
and S108, when the first working voltage is smaller than a preset power grid voltage threshold and the state parameter is higher than the preset first state threshold, the monitoring and control assembly sends a power supply signal to a transformer to an electric energy bidirectional conversion assembly connected between the transformer and the energy storage assembly so as to control the electric energy bidirectional conversion assembly to be in a first power supply mode, so that the energy storage assembly supplies power to a power grid corresponding to the transformer, and the first working voltage of the transformer is increased.
Specifically, external electric wire netting passes through the transformer and is connected with the charging station, and the charging station can include wiring subassembly, the cabinet that charges, the vehicle that charges, two-way conversion subassembly of electric energy, energy storage subassembly and monitoring and control assembly. The transformer can be connected with a power supply from an external power grid, and the transformer can convert the voltage value of the external power grid into the rated voltage of the vehicle charging station. The wiring assembly is connected with the transformer, one path of the junction box is electrically connected with the charging cabinet and then connected with the charging vehicle, and the other path of the junction box is connected with the electric energy bidirectional conversion assembly and the energy storage assembly. One end of the monitoring and control assembly is connected with the wiring assembly, the voltage of the power supply side of the wiring assembly is monitored in real time, namely, the voltage of an external power grid is detected, one end of the wiring assembly is connected with the energy storage assembly, the voltage and the electric quantity of the energy storage assembly are monitored in real time, one end of the wiring assembly is connected with the electric energy bidirectional conversion assembly, and the electric energy bidirectional conversion assembly is controlled to charge or discharge the energy storage assembly. The charging cabinet charges the charging vehicle. It is understood that there may be at least one charging cabinet, and that multiple charging vehicles may be connected to each charging cabinet. The rated capacity of the energy storage component is not specifically limited in the embodiments of the present description, and may be set according to actual needs.
Specifically, the preset grid voltage threshold may be determined according to a rated voltage of the external grid or according to a low-voltage value of a grid enterprise, the specific value of the preset grid voltage threshold is not specifically limited in the embodiment of the present specification, and may be set according to actual needs, for example, a voltage reduced by 10% of the rated voltage value is determined as a grid voltage low (i.e., the preset grid voltage threshold), and if the rated voltage of the external grid is 220V, the preset grid voltage threshold may be 198V.
Specifically, the state parameter of the energy storage assembly may represent the electric energy stored in the energy storage assembly, and the state parameter may be a voltage value or a charge amount of the energy storage assembly. Correspondingly, the preset first state threshold may be a voltage threshold or a charge threshold corresponding to the state parameter. The preset first state threshold may be set according to actual needs, and is not specifically limited in the embodiments of this specification.
The first power supply mode is that the energy storage assembly serves as a power supply and transmits electric energy to the low-voltage side of the transformer through the electric energy bidirectional conversion assembly, and the voltage output by the energy storage assembly is converted into high-voltage of the transformer through the transformer and is output to a connected power grid, so that corresponding electric energy is provided for the power grid.
On the basis of the foregoing embodiment, in an embodiment of this specification, fig. 2 is a flowchart of another charging station charge and discharge automatic balancing method provided in the embodiment of the present application, and as shown in fig. 2, the method further includes:
and S110, when the first working voltage is larger than the preset grid voltage threshold or the state parameter is lower than the preset first state threshold, the monitoring and control component sends a power supply stopping signal to the electric energy bidirectional conversion component to control the electric energy bidirectional conversion component to be disconnected, so that the energy storage component stops supplying power to the transformer.
It is understood that the bidirectional electrical energy conversion assembly can be switched between a plurality of modes, which can be in an off state to disconnect the energy storage assembly from other assemblies.
Illustratively, when the monitoring and control component monitors that the second working voltage of the energy storage component is at a preset first state threshold and simultaneously monitors that the first working voltage of the power supply side (transformer) of the wiring component is at a preset grid voltage threshold, it can be determined that the load of the charging station (local grid) is too large and the power supply of the charging station (local grid) is insufficient, the monitoring and control component sends a power supply signal to the transformer to control the electric energy bidirectional conversion component to start the energy storage component to discharge to an external grid until the voltage of the power supply side of the wiring component is higher than the preset grid voltage threshold or the state parameter of the voltage of the energy storage component presets the first state threshold, and the monitoring and control component sends a power supply stopping signal to control the electric energy bidirectional conversion component to disconnect and stop the energy storage component from discharging to the outside.
On the basis of the foregoing embodiment, in an embodiment of the present specification, fig. 3 is a flowchart of another charging station charge-discharge automatic balancing method provided in the embodiment of the present application, and as shown in fig. 3, the preset energy storage threshold further includes a preset second state threshold, and the preset second state threshold is smaller than the preset first state threshold;
the method further comprises the following steps:
and S302, when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset second state threshold value, the monitoring and control assembly sends a charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a forced charging mode, so that a power grid connected with the transformer charges the energy storage assembly.
Specifically, in the judgment control logic of energy storage component charging and energy storage component discharging, three voltage stages are set according to the required electric quantity of energy storage component self normal operation: 1. and (3) a power failure stage of the energy storage assembly: the energy storage battery is close to a feed state, for example, the electric quantity of the energy storage battery such as a lithium iron phosphate battery or a ternary lithium battery is in a voltage range of 0-1% of the electric quantity, and charging and energy supplementing are urgently needed; 2. the low-voltage stage of the energy storage assembly: the energy storage battery is in a low-voltage state with less energy storage, the stored energy can or can only maintain the self-demand and is not suitable for external discharge, and the electric quantity of the energy storage battery such as a lithium iron phosphate battery or a ternary lithium battery is in a voltage range of 2-3% of the electric quantity; 3. energy storage component high voltage stage: the energy storage battery has a certain electric energy storage or a higher voltage state of more electric energy storage, and can discharge outwards, for example, the electric quantity of the energy storage battery such as a lithium iron phosphate battery or a ternary lithium battery is in a voltage range of more than 5%, and can discharge outwards.
It is understood that the preset second state threshold may be 2-3% of the charge amount, and the preset second state threshold may be 5% of the charge amount. In order to avoid excessive discharge of the energy storage assembly to cause ion activity in the energy storage assembly, when the state parameter of the energy storage assembly is lower than a preset second state threshold value, the electric energy bidirectional conversion assembly is switched to send a charging signal to control the electric energy bidirectional conversion assembly to be in a forced charging mode, and the energy storage assembly is charged forcibly.
On the basis of the foregoing embodiment, in an embodiment of the present specification, fig. 4 is a flowchart of another charging station charge and discharge automatic balancing method provided in the embodiment of the present application, and as shown in fig. 4, the method further includes:
s402, when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset first state threshold and higher than a preset second state threshold, and the first working voltage is lower than a preset grid voltage threshold, the monitoring and control assembly sends a power supply stopping signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be disconnected, so that the energy storage assembly stops charging.
On the basis of the foregoing embodiment, in an embodiment of the present specification, fig. 5 is a flowchart of yet another charging station charge and discharge automatic balancing method provided in the embodiment of the present application, and as shown in fig. 5, the method further includes:
s502, when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset first state threshold and higher than a preset second state threshold and the first working voltage is higher than a preset grid voltage threshold, the monitoring and control assembly sends a charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a first charging mode, so that the electric energy assembly is charged by a grid connected with the transformer.
The first power supply mode is that a connected power grid is used as a power supply, the voltage of the power grid is converted into the charging voltage of the energy storage assembly through the transformer, the voltage of the power grid is output to the connected energy storage assembly through switching the electric energy bidirectional conversion assembly, and the energy storage assembly is charged. It can be understood that, in the first charging mode, the first working voltage and the state parameter are still monitored in real time, and when the first working voltage is smaller than the preset grid voltage threshold value and the state parameter is higher than the preset first state threshold value, the monitoring and control component sends a power supply signal to the transformer to the bidirectional electric energy conversion component connected between the transformer and the energy storage component so as to control the bidirectional electric energy conversion component to be in the first power supply mode, so that the energy storage component supplies power to the grid corresponding to the transformer, and the first working voltage of the transformer is increased.
On the basis of the above embodiment, in an embodiment of the present specification, the method further includes:
when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset first state threshold and higher than a preset second state threshold, and the first working voltage is higher than a preset grid voltage threshold, the monitoring and control assembly sends a charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a second charging mode, so that the electric grid connected with the transformer is full of electricity for the energy storage assembly.
Illustratively, when the monitoring and control assembly monitors that the voltage of the energy storage assembly enters a power failure stage, the monitoring and control assembly sends a signal to control the electric energy bidirectional conversion assembly to charge the energy storage assembly for self energy storage; in the process of energy storage and charging, when the monitoring and control component monitors that the energy storage component enters a low-voltage and low-voltage stage, if the voltage of the power supply side of the wiring component is monitored to be in a state of low grid voltage at the same time, the charging station (local grid) is judged to be overloaded, and the energy storage component has enough electric energy to maintain self operation, and the energy storage component stops storing energy for the energy storage component; when the monitoring and control component monitors that the voltage of the energy storage component enters a low-voltage low stage, and if the voltage of the power supply side of the wiring component is monitored to be not too low as the voltage of the power grid, the charging station (local power grid) is judged to be normally powered, and the energy storage component is continuously charged with energy; when the monitoring and control component monitors that the voltage of the energy storage component enters a high-voltage and low-voltage stage, if the voltage of the power supply side of the wiring component is monitored to be not too low in the voltage of the power grid, the charging station (local power grid) is judged to be normally powered, and energy storage charging is continued to be carried out on the energy storage component until the energy storage component is fully charged.
The second power supply mode is that the connected power grid is used as a power supply, the voltage of the power grid is converted into the charging voltage of the energy storage assembly through the transformer, the voltage of the power grid is output to the connected energy storage assembly through switching the electric energy bidirectional conversion assembly, and the energy storage assembly is charged until the energy storage assembly is fully charged. On the basis of the above embodiment, in an embodiment of the present specification, the charging station further includes a charging cabinet, one end of the charging cabinet is connected to the wiring assembly, and the other end of the charging cabinet is used for connecting to a charging vehicle;
the method further comprises the following steps:
when the first working voltage is larger than a preset power grid voltage threshold value and smaller than the rated voltage of an external power grid, and the state parameter is higher than the preset first state threshold value, the monitoring and control assembly sends a vehicle charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a second power supply mode, so that the energy storage assembly supplies power to the charging vehicle.
On the basis of the above embodiment, in an embodiment of the present specification, the preset grid voltage threshold is determined according to a rated voltage of the external grid.
During operation of the charging station (local power grid), the energy storage component is adjusted to store energy for itself or discharge the energy to adjust power supply and charge balance of the local power grid (charging station) so as to meet vehicle charging requirements.
At the demand of the vehicle that charges in different periods, when one or more vehicle that charges demand charge, the cabinet that charges starts work, charges for the vehicle that charges, and monitoring and control assembly start work, the electric quantity voltage state of monitoring wiring subassembly power supply side voltage in real time, the monitoring energy storage subassembly simultaneously.
Therefore, with the change of the number of the charged vehicles or the change of the requirements of the charged vehicles, the voltage change of the power supply side of the wiring component and the power supply capacity of the transformer are combined, the energy storage component is monitored and adjusted in real time according to the logic method to charge and discharge the energy storage component to the outside, the power supply and power utilization balance of a charging station (local power grid) is relieved, and the requirements of charging and power utilization of the vehicles are met.
The voltage real-time monitoring and energy storage and discharge of the power grid and the energy storage assembly are suitable for energy storage and external discharge of the energy storage battery of the electric automobile when the energy storage battery is idle except for special energy storage, so that the power supply and electricity requirements of the power grid are alleviated.
On the other hand, fig. 6 is a schematic structural diagram of a charging station charging and discharging automatic balancing apparatus provided in an embodiment of the present application, and as shown in fig. 6, the present invention provides a charging station charging and discharging automatic balancing apparatus, which is applied in a charging station, where the charging station includes a wiring component, an electric energy bidirectional conversion component, an energy storage component, and a monitoring and control component, one end of the electric energy bidirectional conversion component is connected to a low-voltage side of a transformer through the wiring component, and a high-voltage side of the transformer is connected to an external power grid;
the device comprises:
an operating voltage acquisition module 710 configured to perform real-time monitoring of a first operating voltage of a transformer connected to a charging station and a state parameter of an energy storage component in the charging station by configuring a monitoring and control component in the charging station;
a first comparison module 720 configured to perform a comparison of the first operating voltage with a preset grid voltage threshold;
a second comparing module 730 configured to perform a comparison of the state parameter with a preset energy storage threshold, the preset energy storage threshold comprising a preset first state threshold;
the power supply module 740 is configured to execute, when the first operating voltage is less than a preset grid voltage threshold and the state parameter is higher than the preset first state threshold, sending, by the monitoring and control component, a transformer power supply signal to the bidirectional electric energy conversion component connected between the transformer and the energy storage component to control the bidirectional electric energy conversion component to be in a first power supply mode, so that the energy storage component supplies power to a grid corresponding to the transformer to increase the first operating voltage of the transformer.
On the other hand, fig. 7 is a schematic structural diagram of a charging station provided in an embodiment of the present application, and as shown in fig. 7, the present invention provides a charging station, where the charging station includes a wiring component, an electric energy bidirectional conversion component, an energy storage component, and a monitoring and control component, one end of the electric energy bidirectional conversion component is connected to a low-voltage side of a transformer through the wiring component, and a high-voltage side of the transformer is connected to an external power grid;
the charging station can execute the charging station charging and discharging automatic balancing method.
The device provided in the above embodiments can execute the method provided in any embodiment of the present application, and has corresponding functional modules and beneficial effects for executing the method. For details of the charging station charging and discharging automatic balancing method, reference may be made to any embodiment of the present application.
The present embodiment also provides a computer-readable storage medium, in which computer-executable instructions are stored, and the computer-executable instructions are loaded by a processor and execute a charging station charge and discharge automatic balancing method according to the present embodiment.
The present embodiments also provide a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the computer device executes the charging station charging and discharging automatic balancing method.
The present embodiment further provides an electronic device, which includes a processor and a memory, where the memory stores a computer program, and the computer program is adapted to be loaded by the processor and execute the charging station charging and discharging automatic balancing method of the present embodiment.
The device may be a computer terminal, a mobile terminal or a server, and the device may also participate in constituting the apparatus or system provided by the embodiments of the present application. Fig. 8 is a schematic diagram of a hardware structure of an apparatus for implementing the method provided in the embodiment of the present application, and as shown in fig. 8, the server 12 may include one or more processors 1202 (1202 a, 1202b, \8230; \ 8230;, 1202n are shown in the figure) (the processors 1202 may include, but are not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 1204 for storing data, and a transmission device 1206 for communication function. Besides, the method can also comprise the following steps: input/output interfaces (I/O interfaces), network interfaces, power supplies, and the like. It will be understood by those skilled in the art that the structure shown in fig. 8 is only an illustration and is not intended to limit the structure of the electronic device. For example, the server 12 may also include more or fewer components than shown in FIG. 8, or have a different configuration than shown in FIG. 8.
It should be noted that the one or more processors 1202 and/or other data processing circuitry described above may be referred to generally herein as data processing circuitry. The data processing circuitry may be embodied in whole or in part in software, hardware, firmware, or any combination thereof. Further, the data processing circuit may be a single stand-alone processing module, or incorporated in whole or in part into any of the other elements in the server 11.
The memory 1204 may be used to store software programs and modules of application software, such as program instructions/data storage devices corresponding to the methods in the embodiments of the present application, and the processor 1202 executes various functional applications and data processing by running the software programs and modules stored in the memory 1204, so as to implement a self-attention network-based time sequence behavior capture box generation method described above. The memory 1204 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 1204 may further include memory located remotely from the processor 1202, which may be connected to the server 12 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission means 1206 is used for receiving or sending data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the server 12. In one example, the transmitting device 1206 includes a Network Interface Controller (NIC) that can be connected to other Network devices via a base station to communicate with the internet. In one example, the transmitting device 1206 can be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
The display may be, for example, a touch screen type Liquid Crystal Display (LCD) that may enable a user to interact with the user interface of the server 12.
The specification provides the method steps as in the examples or flowcharts, but may include more or fewer steps based on conventional or non-inventive labor. The steps and sequences recited in the embodiments are but one manner of performing the steps in a multitude of sequences and do not represent a unique order of performance. In the actual system or interrupted product execution, it may be performed sequentially or in parallel (e.g., in the context of parallel processors or multi-threaded processing) according to the embodiments or methods shown in the figures.
The configurations shown in the present embodiment are only partial configurations related to the present application, and do not constitute a limitation on the devices to which the present application is applied, and a specific device may include more or less components than those shown, or combine some components, or have different arrangements of components. It should be understood that the methods, apparatuses, and the like disclosed in the embodiments may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a module may be divided into only one type of logical function, and may be implemented in other ways, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be an indirect coupling or communication connection through some interfaces, devices or unit modules.
Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (9)
1. The charging station is characterized by comprising a wiring component, an electric energy bidirectional conversion component, an energy storage component and a monitoring and control component, wherein one end of the electric energy bidirectional conversion component is connected with the low-voltage side of a transformer through the wiring component, and the high-voltage side of the transformer is connected with an external power grid;
the method comprises the following steps:
monitoring a first working voltage of a transformer connected with a charging station and state parameters of an energy storage assembly in the charging station in real time by configuring a monitoring and control assembly in the charging station, wherein the state parameters of the energy storage assembly represent electric energy stored in the energy storage assembly;
comparing the first working voltage with a preset grid voltage threshold;
comparing the state parameter with a preset energy storage threshold value, wherein the preset energy storage threshold value comprises a preset first state threshold value;
when the first working voltage is smaller than a preset power grid voltage threshold and the state parameter is higher than the preset first state threshold, the monitoring and control component sends a transformer power supply signal to an electric energy bidirectional conversion component connected between the transformer and the energy storage component to control the electric energy bidirectional conversion component to be in a first power supply mode, so that the energy storage component supplies power to a power grid corresponding to the transformer to improve the first working voltage of the transformer;
when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset first state threshold and higher than a preset second state threshold, and the first working voltage is higher than a preset grid voltage threshold, the monitoring and control assembly sends a charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a first charging mode, so that the electric energy assembly is charged by a grid connected with the transformer.
2. The charging station charge-discharge automatic balancing method according to claim 1, further comprising:
when the first working voltage is larger than the preset grid voltage threshold or the state parameter is lower than the preset first state threshold, the monitoring and control component sends a power supply stopping signal to the electric energy bidirectional conversion component to control the electric energy bidirectional conversion component to be disconnected, so that the energy storage component stops supplying power to the transformer.
3. The charging station charge-discharge automatic balancing method according to claim 2, wherein the predetermined energy storage threshold further comprises a predetermined second state threshold, and the predetermined second state threshold is smaller than the predetermined first state threshold;
the method further comprises the following steps:
when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset second state threshold value, the monitoring and control assembly sends a charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a forced charging mode, so that a power grid connected with the transformer charges the energy storage assembly.
4. The charging station charge-discharge automatic balancing method according to claim 3, further comprising:
when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset first state threshold and higher than a preset second state threshold, and the first working voltage is lower than a preset grid voltage threshold, the monitoring and control assembly sends a power supply stopping signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be disconnected, so that the energy storage assembly stops charging.
5. The charging station charge-discharge automatic balancing method according to claim 1, further comprising:
when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset first state threshold and higher than a preset second state threshold, and the first working voltage is higher than a preset grid voltage threshold, the monitoring and control assembly sends a charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a second charging mode, so that the electric grid connected with the transformer is full of electricity for the energy storage assembly.
6. The charging station charge-discharge automatic balancing method according to claim 1, wherein the charging station further comprises a charging cabinet, one end of the charging cabinet is connected with the wiring assembly, and the other end of the charging cabinet is used for connecting a charging vehicle;
the method further comprises the following steps:
when the first working voltage is larger than a preset power grid voltage threshold value and smaller than the rated voltage of an external power grid, and the state parameter is higher than the preset first state threshold value, the monitoring and control assembly sends a vehicle charging signal to the electric energy bidirectional conversion assembly to control the electric energy bidirectional conversion assembly to be in a second power supply mode, so that the energy storage assembly supplies power to the charging vehicle.
7. The charging station charge-discharge automatic balancing method according to claim 6, wherein the predetermined grid voltage threshold is determined according to a rated voltage of the external grid.
8. The charging station charging and discharging automatic balancing device is characterized by being applied to a charging station, wherein the charging station comprises a wiring component, an electric energy bidirectional conversion component, an energy storage component and a monitoring and control component, one end of the electric energy bidirectional conversion component is connected with the low-voltage side of a transformer through the wiring component, and the high-voltage side of the transformer is connected with an external power grid;
the device comprises:
the charging system comprises an operating voltage acquisition module (710) configured to perform real-time monitoring of a first operating voltage of a transformer connected to a charging station and a state parameter of an energy storage component in the charging station by configuring a monitoring and control component in the charging station, the state parameter of the energy storage component representing electric energy stored in the energy storage component;
a first comparison module (720) configured to perform a comparison of the first operating voltage with a preset grid voltage threshold;
a second comparison module (730) configured to perform a comparison of the state parameter with a preset energy storage threshold, the preset energy storage threshold comprising a preset first state threshold;
a power supply module (740) configured to execute, when the first operating voltage is less than a preset grid voltage threshold and the state parameter is higher than the preset first state threshold, sending, by the monitoring and control component, a transformer power supply signal to a bidirectional electrical energy conversion component connected between the transformer and the energy storage component to control the bidirectional electrical energy conversion component to be in a first power supply mode, so that the energy storage component supplies power to a grid corresponding to the transformer to raise the first operating voltage of the transformer;
the charging module (750) is configured to execute that when the state parameter of the energy storage assembly monitored by the monitoring and control assembly is lower than a preset first state threshold and higher than a preset second state threshold, and the first working voltage is higher than a preset grid voltage threshold, the monitoring and control assembly sends a charging signal to the bidirectional electric energy conversion assembly to control the bidirectional electric energy conversion assembly to be in a first charging mode, so that a grid connected with the transformer charges the energy storage assembly.
9. A charging station is characterized by comprising a wiring component, an electric energy bidirectional conversion component, an energy storage component and a monitoring and control component, wherein one end of the electric energy bidirectional conversion component is connected with the low-voltage side of a transformer through the wiring component, and the high-voltage side of the transformer is connected with an external power grid;
the charging station may perform the charging station charge-discharge automatic balancing method according to any one of claims 1 to 7.
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