CN113794216B - Parameter configuration method and terminal of optical storage and charging system - Google Patents

Parameter configuration method and terminal of optical storage and charging system Download PDF

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Publication number
CN113794216B
CN113794216B CN202111038131.5A CN202111038131A CN113794216B CN 113794216 B CN113794216 B CN 113794216B CN 202111038131 A CN202111038131 A CN 202111038131A CN 113794216 B CN113794216 B CN 113794216B
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charging
power
energy storage
charging pile
output power
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CN113794216A (en
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石正平
方焱琦
张新池
李国伟
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Fujian Times Nebula Technology Co Ltd
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Fujian Times Nebula Technology Co Ltd
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Priority to PCT/CN2022/070034 priority patent/WO2023029335A1/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
    • H02J3/28—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
    • 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
    • B60L53/51—Photovoltaic 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
    • 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
    • B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
    • 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
    • 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
    • B60L53/66—Data transfer between charging stations and vehicles
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • 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

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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)
  • Secondary Cells (AREA)

Abstract

The invention discloses a parameter configuration method and a terminal of a light storage and charging system, wherein the sum of the configured commercial power, the maximum input and output power of an energy storage system and the output power of a photovoltaic system is greater than or equal to the output power of a bidirectional direct current converter, so that the output power of a charging pile when the charging pile is fully loaded can be supported, and the system can be ensured to normally run when the charging pile is fully loaded; the output power of the photovoltaic system is configured to be smaller than the maximum input and output power of the energy storage system, so that the electric quantity of the photovoltaic system is conveniently stored in the energy storage system, and the safety performance of the energy storage system is ensured; by configuring that the output power of the photovoltaic system is smaller than the commercial power, the power is conveniently reversely output to components in the power grid through the energy storage converter for supplying power, so that the parameters of the optical storage and charging system are reasonably configured; the charging requirements sent by the vehicle to the charging pile are received, and the corresponding charging mode is provided according to the charging quantity parameters in the charging requirements, so that the accuracy of parameter configuration is improved.

Description

Parameter configuration method and terminal of optical storage and charging system
Technical Field
The invention relates to the technical field of new energy, in particular to a parameter configuration method and a terminal of an optical storage and charging system.
Background
With the rapid development of electric automobiles, firstly, the number of new energy electric automobiles increases, and secondly, the charging time is shortened, namely, the charging power is increased, in the iteration of the new energy electric automobile charging technology. The pressure on power distribution networks is increasing. The traditional charging facility adopts alternating current charging or alternating current-direct current charging, has high requirement on the power distribution capacity of a power grid, and cannot allocate the peak-valley energy of the power grid.
The high-power direct-current charging equipment is matched with the energy storage battery and the photovoltaic system to perform direct-current capacity expansion on the power grid, a light storage and charging integrated system is built, and the trend of improving the charging power and reducing the power distribution capacity requirement of the power grid is achieved. In order to maintain the stable operation of the light storage and charging system, not to cause interference to a power grid and ensure that each vehicle of a user can be charged normally, the light storage and charging system is difficult to configure with reasonable charging power, energy storage electric quantity and a photovoltaic system, and the accuracy of configuration parameters of the light storage and charging system is low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the parameter configuration method and the terminal of the optical storage and charging system are provided, and the accuracy of parameter configuration can be improved.
In order to solve the technical problems, the invention adopts the technical scheme that:
a parameter configuration method of a light storage and charging system comprises the following steps:
the sum of commercial power obtained by conversion of an energy storage converter in the optical storage and charging system, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is configured to be greater than or equal to the output power of a bidirectional direct current converter connected with a charging pile;
configuring the output power of the photovoltaic system to be smaller than the commercial power and smaller than the maximum input and output power of the energy storage system;
receiving a charging demand sent by a vehicle to the charging pile, and providing commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to a charging electric quantity parameter in the charging demand.
In order to solve the technical problem, the invention adopts another technical scheme as follows:
a parameter configuration terminal of an optical storage and charging system, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
the sum of commercial power obtained by conversion of an energy storage converter in the optical storage and charging system, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is configured to be greater than or equal to the output power of a bidirectional direct current converter connected with a charging pile;
configuring the output power of the photovoltaic system to be smaller than the commercial power and smaller than the maximum input and output power of the energy storage system;
receiving a charging demand sent by a vehicle to the charging pile, and providing commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to a charging electric quantity parameter in the charging demand.
The invention has the beneficial effects that: the sum of the commercial power, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is configured to be larger than or equal to the output power of the bidirectional direct current converter, so that the output power of the charging pile when the charging pile is fully loaded can be supported, and the system can normally run when the charging pile is fully loaded; the output power of the photovoltaic system is configured to be smaller than the maximum input and output power of the energy storage system, so that the electric quantity of the photovoltaic system is conveniently stored in the energy storage system, and the safety performance of the energy storage system is ensured; by configuring that the output power of the photovoltaic system is smaller than the commercial power, the power is conveniently reversely output to components in the power grid through the energy storage converter for supplying power, so that the parameters of the optical storage and charging system are reasonably configured; the charging requirements sent by the vehicle to the charging pile are received, and the corresponding charging mode is provided according to the charging quantity parameters in the charging requirements, so that the accuracy of parameter configuration is improved.
Drawings
Fig. 1 is a flowchart of a parameter configuration method of an optical storage and charging system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a parameter configuration terminal of an optical storage and charging system according to an embodiment of the present invention;
fig. 3 is a topological diagram of an optical storage and charging system according to a parameter configuration method of the optical storage and charging system in an embodiment of the present invention;
fig. 4 is a power ratio diagram of a parameter configuration method of an optical storage and charging system according to an embodiment of the present invention;
fig. 5 is a parameter configuration diagram of a parameter configuration method of an optical storage and charging system according to an embodiment of the present invention.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, fig. 3 to fig. 5, an embodiment of the present invention provides a method for configuring parameters of an optical storage and charging system, including:
the sum of commercial power obtained by conversion of an energy storage converter in the optical storage and charging system, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is configured to be greater than or equal to the output power of a bidirectional direct current converter connected with a charging pile;
configuring the output power of the photovoltaic system to be smaller than the commercial power and smaller than the maximum input and output power of the energy storage system;
receiving a charging demand sent by a vehicle to the charging pile, and providing commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to a charging electric quantity parameter in the charging demand.
From the above description, the beneficial effects of the present invention are: the sum of the commercial power, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is configured to be larger than or equal to the output power of the bidirectional direct current converter, so that the output power of the charging pile when the charging pile is fully loaded can be supported, and the system can normally run when the charging pile is fully loaded; the output power of the photovoltaic system is configured to be smaller than the maximum input and output power of the energy storage system, so that the electric quantity of the photovoltaic system is conveniently stored in the energy storage system, and the safety performance of the energy storage system is ensured; by configuring that the output power of the photovoltaic system is smaller than the commercial power, the power is conveniently reversely output to components in the power grid through the energy storage converter for supplying power, so that the parameters of the optical storage and charging system are reasonably configured; the charging requirements sent by the vehicle to the charging pile are received, and the corresponding charging mode is provided according to the charging quantity parameters in the charging requirements, so that the accuracy of parameter configuration is improved.
Further, configuring the output power of the photovoltaic system to be less than the utility power and less than the maximum input-output power of the energy storage system comprises:
if the charging pile stops charging the vehicle, outputting the power of the photovoltaic system to the energy storage system;
and if the charging pile stops charging the vehicle and the energy storage system is charged, outputting the power of the photovoltaic system to the energy storage converter, and outputting the power to components in the power grid in a reverse direction through the energy storage converter to supply power.
According to the above description, if the charging pile stops charging the vehicle, the redundant electric quantity is stored in the energy storage system, and the safety performance of the energy storage system can be ensured because the output power of the photovoltaic system is less than the maximum input and output power of the energy storage system; if the charging pile stops charging the vehicle and the energy storage system is charged, the energy storage converter reversely outputs power to components in the power grid for supplying power, and the output power of the photovoltaic system is smaller than the commercial power, so that the power in the photovoltaic system can be completely released, and the parameters of the optical storage charging system are reasonably configured.
Further, still include:
and configuring the energy storage converter to convert to obtain commercial power which is less than or equal to one half of the maximum input and output power of the energy storage system.
From the above description, when the energy storage system is charged by the mains supply, the mains supply power is less than or equal to one half of the maximum input/output power of the energy storage system, and the service life of the energy storage system can be effectively prolonged.
Further, the receiving the charging requirement sent by the vehicle to the charging pile comprises:
if the vehicle is connected with the charging pile, the low voltage is used for assisting the conduction of a power supply loop of the charging pile, so that power is supplied to the vehicle, and an insulation test is carried out;
after the insulation test, inputting a discharge circuit for discharging energy for the charging pile, and periodically sending a charging communication handshake message to the vehicle.
According to the above description, before the charging requirement of the vehicle is received, the insulation test is performed on the charging pile, the residual energy is released by inputting the release circuit after the test is finished, and the charging communication handshake messages are periodically sent to the vehicle, so that the safety of the equipment is ensured.
Further, providing the commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to the charging electric quantity parameter in the charging demand comprises:
calculating the charging power required to be output by the charging pile according to the charging electric quantity parameter of each vehicle connected with the charging pile;
if the charging power is smaller than a power threshold value, judging whether the charging power is larger than the output power of the photovoltaic system, if so, using the commercial power and the photovoltaic system to supply power to the charging pile and the energy storage system, otherwise, using the photovoltaic system to supply power to the charging pile and the energy storage system;
if the charging power is larger than or equal to a power threshold value, judging whether the charging power is larger than the sum of the maximum input and output power of the energy storage system and the output power of the photovoltaic system, if so, using the commercial power, the energy storage system and the photovoltaic system to supply power for the charging pile, otherwise, using the energy storage system and the photovoltaic system to supply power for the charging pile.
According to the description, the charging power required to be output by the charging pile is calculated according to the charging electric quantity parameter of each vehicle connected with the charging pile, and if the charging power is smaller than the power threshold value, the commercial power and photovoltaic system is used for supplying power to the charging pile and the energy storage system; if the charging power is larger than or equal to the power threshold value, the commercial power, the energy storage system and the photovoltaic system are used for supplying power to the charging pile, so that the charging mode can be flexibly adjusted according to the charging power required to be output based on the charging pile, and the power of each device is reasonably distributed and controlled.
Referring to fig. 2, another embodiment of the present invention provides a parameter configuration terminal of an optical storage and charging system, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the following steps:
the sum of commercial power obtained by conversion of an energy storage converter in the optical storage and charging system, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is configured to be greater than or equal to the output power of a bidirectional direct current converter connected with a charging pile;
configuring the output power of the photovoltaic system to be smaller than the commercial power and smaller than the maximum input and output power of the energy storage system;
receiving a charging demand sent by a vehicle to the charging pile, and providing commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to a charging electric quantity parameter in the charging demand.
According to the description, the sum of the commercial power, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is configured to be larger than or equal to the output power of the bidirectional direct current converter, so that the output power of the charging pile when the charging pile is fully loaded can be supported, and the system can normally run when the charging pile is fully loaded; the output power of the photovoltaic system is configured to be smaller than the maximum input and output power of the energy storage system, so that the electric quantity of the photovoltaic system is conveniently stored in the energy storage system, and the safety performance of the energy storage system is ensured; by configuring that the output power of the photovoltaic system is smaller than the commercial power, the power is conveniently reversely output to components in the power grid through the energy storage converter for supplying power, so that the parameters of the optical storage and charging system are reasonably configured; the charging requirements sent by the vehicle to the charging pile are received, and the corresponding charging mode is provided according to the charging quantity parameters in the charging requirements, so that the accuracy of parameter configuration is improved.
Further, configuring the output power of the photovoltaic system to be less than the utility power and less than the maximum input-output power of the energy storage system comprises:
if the charging pile stops charging the vehicle, outputting the power of the photovoltaic system to the energy storage system;
and if the charging pile stops charging the vehicle and the energy storage system is charged, outputting the power of the photovoltaic system to the energy storage converter, and outputting the power to components in the power grid in a reverse direction through the energy storage converter to supply power.
According to the above description, if the charging pile stops charging the vehicle, the redundant electric quantity is stored in the energy storage system, and the safety performance of the energy storage system can be ensured because the output power of the photovoltaic system is less than the maximum input and output power of the energy storage system; if the charging pile stops charging the vehicle and the energy storage system is charged, the energy storage converter reversely outputs power to components in the power grid for supplying power, and the output power of the photovoltaic system is smaller than the commercial power, so that the power in the photovoltaic system can be completely released, and the parameters of the optical storage charging system are reasonably configured.
Further, still include:
and configuring the energy storage converter to convert to obtain commercial power which is less than or equal to one half of the maximum input and output power of the energy storage system.
According to the description, when the energy storage system is charged by the mains supply, the mains supply power is less than or equal to one half of the maximum input and output power of the energy storage system, and the service life of the energy storage system can be effectively prolonged.
Further, the receiving the charging requirement sent by the vehicle to the charging pile comprises:
if the vehicle is connected with the charging pile, the low voltage is used for assisting the conduction of a power supply loop of the charging pile, so that power is supplied to the vehicle, and an insulation test is carried out;
after the insulation test, inputting a discharge circuit for discharging energy for the charging pile, and periodically sending a charging communication handshake message to the vehicle.
According to the above description, before the charging requirement of the vehicle is received, the insulation test is performed on the charging pile, the residual energy is released by inputting the release circuit after the test is finished, and the charging communication handshake messages are periodically sent to the vehicle, so that the safety of the equipment is ensured.
Further, providing the commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to the charging electric quantity parameter in the charging demand comprises:
calculating the charging power required to be output by the charging pile according to the charging electric quantity parameter of each vehicle connected with the charging pile;
if the charging power is smaller than a power threshold value, judging whether the charging power is larger than the output power of the photovoltaic system, if so, using the commercial power and the photovoltaic system to supply power to the charging pile and the energy storage system, otherwise, using the photovoltaic system to supply power to the charging pile and the energy storage system;
if the charging power is larger than or equal to a power threshold value, judging whether the charging power is larger than the sum of the maximum input and output power of the energy storage system and the output power of the photovoltaic system, if so, using the commercial power, the energy storage system and the photovoltaic system to supply power for the charging pile, otherwise, using the energy storage system and the photovoltaic system to supply power for the charging pile.
According to the description, the charging power required to be output by the charging pile is calculated according to the charging electric quantity parameter of each vehicle connected with the charging pile, and if the charging power is smaller than the power threshold value, the commercial power and photovoltaic system is used for supplying power to the charging pile and the energy storage system; if the charging power is larger than or equal to the power threshold value, the commercial power, the energy storage system and the photovoltaic system are used for supplying power to the charging pile, so that the charging mode can be flexibly adjusted according to the charging power required to be output based on the charging pile, and the power of each device is reasonably distributed and controlled.
The parameter configuration method and the terminal of the optical storage and charging system are suitable for configuring reasonable charging power, energy storage capacity and photovoltaic system for the optical storage and charging system, and improve the accuracy of parameter configuration, and are explained by the following specific implementation modes:
example one
Referring to fig. 1, fig. 3 to fig. 5, a method for configuring parameters of an optical storage and charging system includes the steps of:
s1, configuring that the sum of the commercial power obtained by conversion of the energy storage converter in the light storage and charging system, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is larger than or equal to the output power of the bidirectional direct current converter connected with the charging pile.
Specifically, referring to fig. 3, the hardware of the light storage and charging system includes a power storage converter (PCS), a battery energy storage system, a dc intelligent charging system and a photovoltaic power generation system. All hardware is uniformly scheduled and controlled by an Energy Management System (EMS), and the concrete contents of the hardware of the optical storage and charging system are as follows:
1. an energy storage converter: the battery management system is communicated with a Battery Management System (BMS), performs charge and discharge management on a battery energy storage system, and receives energy allocation and control protection of an EMS;
2. a battery energy storage system: the system is formed by connecting safe and reliable lithium iron phosphate batteries in series and parallel, is in a sampling modular design, forms an energy storage system after each module is connected in series and parallel, and is matched with a battery management system to carry out data acquisition and control protection on the batteries;
3. direct current intelligent charging system: the bidirectional isolation direct current converter and the split charging pile form the bidirectional isolation direct current converter. 6 split type electric pile that fills of configuration:
bidirectional isolation direct current converter: the bidirectional isolation direct current converter is a power module of the direct current intelligent charging system, and can charge the electric automobile in high power to realize the purpose of quick charging;
split type electric pile that fills: the intelligent charging system is used as a charging control unit of the intelligent charging system, has the functions of electric energy metering and insulation detection, and is communicated with an electric automobile BMS communication interface, a bidirectional direct current converter communication interface and an EMS communication interface;
4. a photovoltaic system: a photovoltaic controller: the photovoltaic module is one of core devices forming a direct current photovoltaic Power generation system, is provided with an MPPT (Maximum Power Point Tracking, Maximum Power Point Tracking control solar controller), can realize high-efficiency DC/DC conversion, converts direct current energy output by the photovoltaic module into voltage matched with a direct current bus of an energy storage system, stores green energy in the energy storage system or directly uses the green energy for a load, and realizes high-efficiency utilization of photovoltaic Power generation. The photovoltaic controller receives the charging control of the battery system BMS and the management and scheduling of the EMS.
5. Energy Management System (EMS): monitoring and controlling of various energy sources of the whole micro-grid system are realized through an EMS (energy management system); and processing, displaying, controlling and protecting the main charging and discharging data of the energy storage system and the electric automobile.
In this embodiment, referring to fig. 4, the energy storage converter converts the utility power a, the maximum output and input power B of the battery energy storage system, the output power D of the photovoltaic system, and the external output power C of the charging system, and needs to satisfy: a + B + D is more than or equal to C, so that the output power of the charging pile when the charging pile is fully loaded can be supported by the photovoltaic power + the battery power + the energy storage converter power, and the system can be ensured to normally operate when the charging pile is fully loaded.
And S2, configuring the output power of the photovoltaic system to be smaller than the commercial power and smaller than the maximum input and output power of the energy storage system.
Wherein configuring the output power of the photovoltaic system to be less than the utility power and less than the maximum input-output power of the energy storage system comprises:
if the charging pile stops charging the vehicle, outputting the power of the photovoltaic system to the energy storage system;
and if the charging pile stops charging the vehicle and the energy storage system is charged, outputting the power of the photovoltaic system to the energy storage converter, and outputting the power to components in the power grid in a reverse direction through the energy storage converter to supply power.
Specifically, in the embodiment, the parameter configuration needs to satisfy D < a and D < B, so that the photovoltaic system can be used for supplying power to the battery energy storage system under the condition that the photovoltaic system continuously generates power and the power of the charging pile cannot be consumed; under the condition that the photovoltaic system continuously generates power, the battery energy storage system cannot absorb the power and the charging pile cannot consume the power, the energy storage converter can be used for reversely outputting the power to a power grid to carry out photovoltaic grid connection and reversely supplying power to components in a local area network.
And a photovoltaic controller is configured in the photovoltaic system, and the MPPT tracking function is realized, so that high-efficiency conversion is realized. The photovoltaic module converts solar energy into direct current electric energy, the direct current electric energy passes through the direct current converter and then can directly charge the electric automobile through the charging pile, and redundant electric quantity is stored in the energy storage system through the energy storage inverter. The alternating current photovoltaic power generation subsystem can accept energy scheduling of an EMS energy management system, and energy utilization maximization is guaranteed.
Wherein, still include:
and configuring the energy storage converter to convert to obtain commercial power which is less than or equal to one half of the maximum input and output power of the energy storage system.
Specifically, in this embodiment, the parameter configuration needs to satisfy a requirement that a is not greater than 0.5 × B, so that when the commercial power is used to charge the battery energy storage system, the charging rate is 0.5C (C represents the ratio of the battery discharging current/charging current, i.e., the current magnitude during charging and discharging the battery), and compared with the charging rate of 1C, the service life of the battery energy storage system can be effectively prolonged.
Referring to fig. 5, the configuration method can be configured as follows: 250kW energy storage converter, 500 ~ 600kWh battery energy storage system (maximum charge-discharge multiplying power 1C), 720kW and 250kW of photovoltaic power of direct current charging power, this configuration satisfies the following condition:
1. the battery power is 500 kW-600 kW, the energy storage converter is 250kW, the photovoltaic power is 250kW and is more than or equal to 720kW of charging pile power;
2. the energy storage converter 250kW is less than or equal to 0.5 kW and the energy storage power is 500 kW-600 kW;
3. the energy storage converter 250kW is more than or equal to the photovoltaic power 250 kW;
4. the battery power is 500kW and is more than or equal to the photovoltaic power of 250 kW.
Therefore, the reasonable proportion of the energy storage power-grid power-photovoltaic power-charging power is configured, and the light storage and charging system can be ensured to stably and continuously operate.
S3, receiving a charging demand sent by a vehicle to the charging pile, and providing the commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to the charging electric quantity parameter in the charging demand.
Wherein, before receiving the charging demand that the vehicle sent to fill electric pile includes:
if the vehicle is connected with the charging pile, the low voltage is used for assisting the conduction of a power supply loop of the charging pile, so that power is supplied to the vehicle, and an insulation test is carried out;
after the insulation test, inputting a discharge circuit for discharging energy for the charging pile, and periodically sending a charging communication handshake message to the vehicle.
Specifically, when the vehicle is charged by using the alternating-current charging pile, the charging pile controller judges whether a charging socket is connected or not, and locks the electronic lock to prevent the gun head from falling off; entering a self-checking stage, conducting a low-voltage auxiliary power supply loop to supply power to an electric automobile control device and carrying out insulation monitoring; after the detection is finished, putting the energy into a discharge loop to discharge, and simultaneously starting to periodically send a communication handshake message;
after entering the charging stage, the vehicle sends the parameter of battery charging demand to filling electric pile controller in real time, and the parameter includes: the method comprises the following steps of obtaining the maximum allowable charging voltage of a single cell, the maximum allowable total charging voltage of a power battery system, the maximum allowable charging current of the power battery system, the maximum allowable temperature of the single cell, the current voltages of the single cell and the power battery system, the SOC and the like. The energy storage system can adjust and output charging voltage and current in real time according to the parameters and mutually send respective state information, and the charging electric quantity required by the vehicle can be reduced from the battery energy storage system or the energy storage converter to the proper voltage of the vehicle through the bidirectional direct current converter for charging; and the charging information can be uploaded to an EMS (energy management system), a cloud platform and a mobile phone APP/applet, the vehicle judges whether the charging state is full or not according to the internal logic of the BMS, and the message is transmitted to the controller to execute a charging finishing command.
Example two
The difference between the present embodiment and the first embodiment is that how to provide the corresponding charging mode according to the charging capacity parameter is further defined, specifically:
calculating the charging power required to be output by the charging pile according to the charging electric quantity parameter of each vehicle connected with the charging pile;
if the charging power is smaller than a power threshold value, judging whether the charging power is larger than the output power of the photovoltaic system, if so, using the commercial power and the photovoltaic system to supply power to the charging pile and the energy storage system, otherwise, using the photovoltaic system to supply power to the charging pile and the energy storage system;
if the charging power is larger than or equal to a power threshold value, judging whether the charging power is larger than the sum of the maximum input and output power of the energy storage system and the output power of the photovoltaic system, if so, using the commercial power, the energy storage system and the photovoltaic system to supply power for the charging pile, otherwise, using the energy storage system and the photovoltaic system to supply power for the charging pile.
In this embodiment, the light storage and charging system can use multiple operation modes, and the main mode is that the commercial power, the battery energy storage system and the photovoltaic system supply power to the charging pile; the photovoltaic power refers to the maximum photovoltaic output power, for example, the above-mentioned photovoltaic power is 250kW, that is, the maximum photovoltaic output power is 250kW, and because of the difference in the sunlight intensity, the output power of the photovoltaic system at each moment changes in real time.
Specifically, in this embodiment, the utility power converted by the energy storage converter is 250kW, the maximum input and output power of the battery energy storage system is 500kWh, the output power of the photovoltaic system is 200kW, and the power threshold is 500 kW;
when the power required by the charging pile is less than or equal to 200kW, the photovoltaic assembly supplies power to the battery energy storage system and the charging pile;
when the power required by the charging pile is less than 500kW and 200kW is less than the power required by the charging pile, the photovoltaic module and the commercial power supply power for the battery energy storage system and the charging pile;
when the power required by the charging pile is less than or equal to 500kW and less than or equal to 500kW +200kW, the charging pile is powered by the battery energy storage system and the photovoltaic system;
when the required power of the charging pile is more than 500kW +200kW, the commercial power, the battery energy storage system and the photovoltaic system supply power to the charging pile.
In other equivalent embodiments, if the photovoltaic energy is insufficient, for example, at night, the output power of the photovoltaic system is low, and at this time, in order to preferentially satisfy the power required by the charging pile, the commercial power and the stored energy supply the charging pile.
Whole power distribution is controlled by each part power of EMS system overall planning, consequently configures reasonable electric pile quantity and the charging power of filling, can ensure to satisfy the charging power demand of vehicle, guarantees the rotation rate at station.
EXAMPLE III
Referring to fig. 2, a parameter configuration terminal of an optical storage and charging system includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of a parameter configuration method of an optical storage and charging system according to one or two embodiments.
In summary, according to the parameter configuration method and the terminal for the optical storage and charging system provided by the invention, the sum of the commercial power, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is configured to be greater than or equal to the output power of the bidirectional direct current converter, so that the output power of the charging pile when the charging pile is fully loaded can be supported, and the system can be ensured to normally operate when the charging pile is fully loaded; if the charging pile stops charging the vehicle, the redundant electric quantity is stored in the energy storage system, and the safety performance of the energy storage system can be ensured because the output power of the photovoltaic system is smaller than the maximum input and output power of the energy storage system; if the charging pile stops charging the vehicle and the energy storage system is charged, reversely outputting power to components in the power grid through the energy storage converter to supply power, and ensuring that all the power in the photovoltaic system is released because the output power of the photovoltaic system is smaller than the commercial power, thereby reasonably configuring parameters of the optical storage and charging system; the commercial power converted by the energy storage converter is less than or equal to one half of the maximum input and output power of the energy storage system, so that the service life of the energy storage system is effectively prolonged; the charging requirements sent by the vehicle to the charging pile are received, and the corresponding charging mode is provided according to the charging quantity parameters in the charging requirements, so that the accuracy of parameter configuration is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims (8)

1. A parameter configuration method of a light storage and charging system is characterized by comprising the following steps:
the sum of commercial power obtained by conversion of an energy storage converter in the optical storage and charging system, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is configured to be greater than or equal to the output power of a bidirectional direct current converter connected with a charging pile;
configuring the output power of the photovoltaic system to be smaller than the commercial power and smaller than the maximum input and output power of the energy storage system;
receiving a charging demand sent by a vehicle to the charging pile, and providing commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to a charging electric quantity parameter in the charging demand;
providing the commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to the charging electric quantity parameter in the charging demand comprises the following steps:
calculating the charging power required to be output by the charging pile according to the charging electric quantity parameter of each vehicle connected with the charging pile;
if the charging power is smaller than a power threshold value, judging whether the charging power is larger than the output power of the photovoltaic system, if so, using the commercial power and the photovoltaic system to supply power to the charging pile and the energy storage system, otherwise, using the photovoltaic system to supply power to the charging pile and the energy storage system;
if the charging power is larger than or equal to a power threshold value, judging whether the charging power is larger than the sum of the maximum input and output power of the energy storage system and the output power of the photovoltaic system, if so, using the commercial power, the energy storage system and the photovoltaic system to supply power for the charging pile, otherwise, using the energy storage system and the photovoltaic system to supply power for the charging pile.
2. The method of claim 1, wherein configuring the output power of the photovoltaic system to be less than the utility power and less than the maximum input/output power of the energy storage system comprises:
if the charging pile stops charging the vehicle, outputting the power of the photovoltaic system to the energy storage system;
and if the charging pile stops charging the vehicle and the energy storage system is charged, outputting the power of the photovoltaic system to the energy storage converter, and outputting the power to components in the power grid in a reverse direction through the energy storage converter to supply power.
3. The method for configuring parameters of a light storage and charging system according to claim 1, further comprising:
and configuring the energy storage converter to convert to obtain commercial power which is less than or equal to one half of the maximum input and output power of the energy storage system.
4. The method of claim 1, wherein the receiving the charging requirement sent by the vehicle to the charging post comprises:
if the vehicle is connected with the charging pile, the low voltage is used for assisting the conduction of a power supply loop of the charging pile, so that power is supplied to the vehicle, and an insulation test is carried out;
after the insulation test, inputting a discharge circuit for discharging energy for the charging pile, and periodically sending a charging communication handshake message to the vehicle.
5. A parameter configuration terminal of an optical storage and charging system, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the following steps when executing the computer program:
the sum of commercial power obtained by conversion of an energy storage converter in the optical storage and charging system, the maximum input and output power of the energy storage system and the output power of the photovoltaic system is configured to be greater than or equal to the output power of a bidirectional direct current converter connected with a charging pile;
configuring the output power of the photovoltaic system to be smaller than the commercial power and smaller than the maximum input and output power of the energy storage system;
receiving a charging demand sent by a vehicle to the charging pile, and providing commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to a charging electric quantity parameter in the charging demand;
providing the commercial power converted by the energy storage converter or the energy storage system or the photovoltaic system for charging according to the charging electric quantity parameter in the charging demand comprises the following steps:
calculating the charging power required to be output by the charging pile according to the charging electric quantity parameter of each vehicle connected with the charging pile;
if the charging power is smaller than a power threshold value, judging whether the charging power is larger than the output power of the photovoltaic system, if so, using the commercial power and the photovoltaic system to supply power to the charging pile and the energy storage system, otherwise, using the photovoltaic system to supply power to the charging pile and the energy storage system;
if the charging power is larger than or equal to a power threshold value, judging whether the charging power is larger than the sum of the maximum input and output power of the energy storage system and the output power of the photovoltaic system, if so, using the commercial power, the energy storage system and the photovoltaic system to supply power for the charging pile, otherwise, using the energy storage system and the photovoltaic system to supply power for the charging pile.
6. The terminal for configuring parameters of a light storage and charging system according to claim 5, wherein configuring the output power of the photovoltaic system to be less than the utility power and less than the maximum input and output power of the energy storage system comprises:
if the charging pile stops charging the vehicle, outputting the power of the photovoltaic system to the energy storage system;
and if the charging pile stops charging the vehicle and the energy storage system is charged, outputting the power of the photovoltaic system to the energy storage converter, and outputting the power to components in the power grid in a reverse direction through the energy storage converter to supply power.
7. The terminal for configuring parameters of an optical charging and storage system according to claim 5, further comprising:
and configuring the energy storage converter to convert to obtain commercial power which is less than or equal to one half of the maximum input and output power of the energy storage system.
8. The parameter configuration terminal of an optical storage and charging system according to claim 5, wherein the receiving of the charging requirement sent by the vehicle to the charging post comprises:
if the vehicle is connected with the charging pile, the low voltage is used for assisting the conduction of a power supply loop of the charging pile, so that power is supplied to the vehicle, and an insulation test is carried out;
after the insulation test, inputting a discharge circuit for discharging energy for the charging pile, and periodically sending a charging communication handshake message to the vehicle.
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