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CN119401626A - Intelligent regulation and control method for photovoltaic components in battery swap stations - Google Patents

Intelligent regulation and control method for photovoltaic components in battery swap stations Download PDF

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Publication number
CN119401626A
CN119401626A CN202510017917.0A CN202510017917A CN119401626A CN 119401626 A CN119401626 A CN 119401626A CN 202510017917 A CN202510017917 A CN 202510017917A CN 119401626 A CN119401626 A CN 119401626A
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CN
China
Prior art keywords
module
controller
exchange station
photovoltaic
power exchange
Prior art date
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Pending
Application number
CN202510017917.0A
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Chinese (zh)
Inventor
陆旭东
张晓峰
胡晋茹
薛铸
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China Academy of Transportation Sciences
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China Academy of Transportation Sciences
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Application filed by China Academy of Transportation Sciences filed Critical China Academy of Transportation Sciences
Priority to CN202510017917.0A priority Critical patent/CN119401626A/en
Publication of CN119401626A publication Critical patent/CN119401626A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • B60L53/80—Exchanging energy storage elements, e.g. removable batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H02J2300/26—The renewable source being solar energy of photovoltaic origin involving maximum power point tracking control for photovoltaic sources

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention discloses an intelligent regulation control method for a photovoltaic module of a power exchange station, which relates to the technical field of power exchange stations and comprises a photovoltaic array module, a controller, an inverter and an alternating current load, wherein the photovoltaic array module, the controller, the inverter and the alternating current load are sequentially connected in sequence, the controller is additionally connected with an energy storage device of the power exchange station, the controller is connected with the inverter and is also connected with the direct current load, the photovoltaic array module consists of a plurality of photovoltaic cells, the controller is respectively connected with a main control module and a monitoring module, the main control module is in data communication connection with an upper computer, and the monitoring module is connected with a user and the controller. According to the invention, the photovoltaic array module, the controller, the main control module and the monitoring module are arranged, so that the intelligent regulation can be rapidly performed while the converted enough electric energy is transmitted into the energy storage device of the power exchange station through the controller, and the energy storage capacity and the energy storage efficiency of the energy storage device are improved.

Description

Intelligent regulation control method for photovoltaic module of power exchange station
Technical Field
The invention relates to the technical field of power exchange stations, in particular to an intelligent regulation control method for a photovoltaic module of a power exchange station.
Background
The current heavy truck green traffic (logistics) demonstration project is successfully completed and formally put into use, and the project is a national first-seat photovoltaic direct-supply power exchange station. The project is built into 2 power exchange stations for one-period co-operation, occupies 600 square meters, can serve 100 power exchange heavy cards, is unattended, can realize full-automatic energy supply within 3-5 minutes, and can provide services such as trolley separation, battery renting, interchangeability and upgrading for a transporter.
Therefore, the technology fusion trend of the power exchange station and the photovoltaic module is more and more obvious, and along with the recent high-speed development of new energy automobiles, the mutual cooperation of the power exchange station and the photovoltaic module is more and more compact, and the performance and the efficiency of a photovoltaic power generation system are always limited by the intelligent control level of the system, so that the improvement of the intelligent control method and the intelligent control system for the energy communication of the photovoltaic power generation and the power exchange station becomes a hot spot for research.
Disclosure of Invention
The invention provides an intelligent regulation control method for a photovoltaic module of a power exchange station, which aims to solve the problems in the background technology.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a change power station photovoltaic module intelligent regulation control method, includes photovoltaic array module, controller, dc-to-ac converter, alternating current load, photovoltaic array module, controller, dc-to-ac converter and alternating current load connect gradually in proper order, the controller is connected with the power station energy memory in addition, the dc-to-ac converter is also connected to the controller connection dc-to-ac converter simultaneously, photovoltaic array module comprises a plurality of photovoltaic cells, the controller is master control module and monitoring module respectively, master control module and host computer data communication are connected, the monitoring module connects user and controller.
Acquiring an over-charge alarm voltage value of a storage battery, an over-charge protection point voltage value of the storage battery, an over-discharge recovery point voltage value of the storage battery, an over-discharge protection point voltage value of the storage battery and an over-discharge alarm voltage value of the storage battery in an energy storage device system of the power exchange station, monitoring whether the voltage values meet preset conditions, sending an alarm signal if the voltage values do not meet the preset conditions, and cutting off a power supply.
The photovoltaic array module is formed by combining a plurality of photovoltaic battery units in a series-parallel connection mode, enough electric energy with high output power can be output under the action of solar energy, the converted enough electric energy is transmitted into the energy storage device of the power exchange station through the controller and used for carrying out quick charging operation on a new energy automobile, and the controller arranged in the middle can be used for completing intelligent regulation.
The technical scheme of the invention is further improved in that the photovoltaic array module is connected with a PWM charging controller, a BUCK circuit is adopted in a main circuit topology structure of the PWM charging controller, the photovoltaic array module is connected with a temperature sensor, an IGBT in the PWM charging controller is directly connected when the temperature sensor alarms, pulse width modulation is adopted, the other path of the photovoltaic array module is connected with a follow current diode, and a Hall sensor is adopted in current and voltage isolation sampling.
The main advantage of the PWM charge controller is that it provides well-controlled charging characteristics to the battery of the battery-exchange station. The pulse width modulation technology is used, the function of the battery of the power exchange station can be exerted to the greatest extent, the battery of the power exchange station is fully filled, gasification is reduced, the maximum power point of the photovoltaic array can be tracked, and the service life of the battery of the power exchange station is effectively prolonged due to the good temperature compensation function.
The technical scheme of the invention is further improved in that a core control device of a main control module in the controller is an AT89C52 singlechip, the singlechip controls a main circuit switch through an isolation driving circuit, the main control module stores system operation parameters and system operation state information through an EEPROM, a detection circuit is used for placing system program disorder, a state indicating circuit is used for indicating the system state, data communication is carried out between the main control module and an upper computer through an RS485 communication interface, and a fan is arranged in the main control module.
When the temperature is too high, the temperature of the main control circuit board or the battery pack of the power exchange station is reduced by the fan, and in addition, in order to facilitate system expansion, the main control module is provided with a unique identification number by adopting a code distribution switch, so that one field monitoring circuit board can communicate with a plurality of main control circuit boards. The controller is also provided with a standby power supply, and the standby power supply temporarily supplies power to the load under the condition that the battery pack of the power exchange station cannot normally supply power to the load.
The technical scheme of the invention is further improved in that an LCD display circuit is arranged in the main control module to provide an interpersonal interaction interface for a user, the LCD display circuit is communicated with an LED indicator lamp, and a clock circuit is communicated in the LCD display circuit.
The LED indicator lamp is used for displaying power supply and other faults of the field monitoring module, the EEPROM circuit is used for storing historical data of the photovoltaic power generation system by the field monitoring module, and the detection circuit is used for preventing program disorder of the field monitoring module.
The technical scheme of the invention is further improved, wherein the control mode of the controller between the energy storage device of the power exchange station and the photovoltaic array module mainly comprises the following control scheme of giving an alarm on the overvoltage of the storage battery of the power exchange station, stopping charging and switching the power supply of the standby power supply, cutting off the charging branch step by step, enabling the action interval time to be adjustable for 1 second, enabling the charging and discharging control not to act, recovering the storage battery of the power exchange station to supply power to a load, switching the charging branch step by step, enabling the action interval time to be adjustable for 30 seconds, switching the power supply of the standby power supply, switching all the charging branches to charge, giving an alarm on the undervoltage of the storage battery of the power exchange station, and stopping charging and switching the power supply of the standby power supply.
The preset condition that the voltage value meets is that the voltage value is compared, wherein H1 is the overcharge alarm voltage value of the storage battery, H2 is the overcharge protection point voltage value of the storage battery, H3 is the overdischarge recovery point voltage value of the storage battery, L1 is the overdischarge protection point voltage value of the storage battery, and L2 is the overdischarge alarm voltage value of the storage battery. And comparing the voltage values, wherein H1> H2> H3> L1> L2. The battery voltage value is VB.
Because the battery performance of the battery replacement station in different enterprises is different in capacity, the internal charger timely collects temperature signals of the battery through the singlechip and the detection circuit to continuously adjust the voltage value of the overcharge protection point of the battery, and can adjust the voltage temperature compensation parameter values of the overcharge protection point according to the battery performance of different enterprises. Specifically, vf=vf 0+（T-T0) C, C is a voltage temperature coefficient, vf is a charging threshold voltage temperature value, vf 0 is a temperature of the storage battery, T is a trickle charging start period time, and T 0 is a trickle charging upper period start time.
The technical scheme of the invention is further improved in that the monitoring module adopts three-level measuring, controlling and managing modes, the highest level of the monitoring module is positioned at a monitoring background of a monitoring center, a PC (personal computer) is adopted, and the remote data transmission with the field monitoring module is realized by accessing a public telephone network through a MODEM. The monitoring background is connected with the lower monitoring module and then transmits the control instructions to the power station site monitoring module, wherein the control background comprises the acquisition of power station operation parameters such as storage battery voltage, storage battery temperature, charging current, load current, the highest and lowest voltage of the storage battery on the same day and the maximum charging current and the maximum discharging current on the same day;
The second level of the monitoring module is a field monitoring system, and the third level of the monitoring module is a field data acquisition system.
The task of the field monitoring system is data acquisition and signal control. The field monitoring system is a master-slave bus type measurement and control system based on an RS-485 field bus and a custom communication protocol, wherein a master control module and a field monitoring module are hung on the bus in a plug-in manner, and the master-slave bus type measurement and control system is uniformly managed by the field monitoring module. The system comprises a monitoring layer and a communication layer. The monitoring layer is responsible for receiving data uploaded by the bottom main control module to analyze and store the data, setting and modifying operation parameters of the main control module, inquiring real-time and historical data, realizing monitoring management of main control module equipment, and the communication layer is communicated with the field main control module in real time through a formulated communication protocol to complete data communication transmission, verification and the like. The on-site data acquisition system is also a part of the main control module of the independent photovoltaic power generation system and is used for acquiring the running state information of the independent photovoltaic power supply in real time, transmitting various information to the on-site monitoring module in a serial communication mode, and receiving and executing the instructions of the monitoring module.
The technical scheme of the invention is further improved in that the internal circuit of the photovoltaic array module is isolated by adopting an optical coupler and is directly connected with the A/D chip circuit, the frequency of the system state information adopted by the singlechip is 200mS, and the system state information is adopted for 5 times in 1S and then the system state information data processing is carried out.
By adopting the technical scheme, compared with the prior art, the invention has the following technical progress:
the invention provides an intelligent regulation control method for a photovoltaic module of a power exchange station, which is characterized in that a photovoltaic array module, a controller, a main control module and a monitoring module are arranged between the photovoltaic array module and the controller, so that the energy storage capacity and the energy storage efficiency of an energy storage device can be improved while enough converted electric energy is transmitted into the energy storage device of the power exchange station through the controller.
The invention provides an intelligent regulation control method for a photovoltaic module of a power exchange station, which provides a well-controlled charging characteristic for a storage battery of the power exchange station through a charging controller and an additional power system arranged in a photovoltaic array module, completely fills the storage battery of the power exchange station to reduce gasification, can be used for tracking the maximum power point of the photovoltaic array, and has a good temperature compensation function to effectively prolong the service life of the storage battery of the power exchange station.
The invention provides an intelligent regulation control method for a photovoltaic module of a power exchange station, which enables a main control circuit board or a battery pack of the power exchange station to be rapidly cooled through a main control module and a monitoring module in a controller, and a standby power supply temporarily supplies power to a load under the condition that the battery pack of the power exchange station cannot normally supply power to the load, so that the integrity of the battery pack is ensured, and the monitoring can be timely carried out to rapidly transmit and collect data in an unattended new power exchange station, thereby avoiding the occurrence of safety accidents.
Drawings
FIG. 1 is a schematic diagram of the overall system of the present invention;
FIG. 2 is a schematic diagram of the structure of a master control module and a monitor module in a controller according to the present invention;
FIG. 3 is a schematic diagram of a portion of the connection of pins AT89C52 according to the present invention;
Fig. 4 is a schematic diagram of a charge control mode of the controller according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-4, the invention provides a technical scheme that the photovoltaic power generation system comprises a photovoltaic array module, a controller, an inverter and an alternating current load, wherein the photovoltaic array module, the controller, the inverter and the alternating current load are sequentially connected in sequence, the controller is additionally connected with a power conversion station energy storage device, the controller is connected with the inverter and is also connected with the direct current load, the photovoltaic array module consists of a plurality of photovoltaic cells, the controller is respectively connected with a main control module and a monitoring module, the main control module is in data communication connection with an upper computer, and the monitoring module is connected with a user and the controller.
The photovoltaic array module is formed by combining a plurality of photovoltaic battery units in a series-parallel connection mode, enough electric energy with high output power can be output under the action of solar energy, the converted enough electric energy is transmitted into the energy storage device of the power exchange station through the controller and used for carrying out quick charging operation on a new energy automobile, and the controller arranged in the middle can be used for completing intelligent regulation.
The photovoltaic array module is connected with a PWM charging controller, a BUCK circuit is adopted by a main circuit topological structure of the PWM charging controller, the photovoltaic array module is connected with a temperature sensor, an IGBT in the PWM charging controller is directly connected when the temperature sensor alarms, pulse width modulation is adopted, the other path of the photovoltaic array module is connected with a freewheeling diode, and a Hall sensor is adopted for isolating and sampling current and voltage.
The main advantage of the PWM charge controller is that it provides well-controlled charging characteristics to the battery of the battery-exchange station. The pulse width modulation technology is used, the function of the battery of the power exchange station can be exerted to the greatest extent, the battery of the power exchange station is fully filled, gasification is reduced, the maximum power point of the photovoltaic array can be tracked, and the service life of the battery of the power exchange station is effectively prolonged due to the good temperature compensation function.
The main control module core control device in the controller is an AT89C52 singlechip, the singlechip controls the main circuit switch through the isolation driving circuit, the main control module stores system operation parameters and system operation state information through the EEPROM, the system program disorder is placed through the detection circuit, the system state is indicated through the state indication circuit, data communication is carried out with the upper computer through the RS485 communication interface, and the main control module is internally provided with a fan.
When the temperature is too high, the temperature of the main control circuit board or the battery pack of the power exchange station is reduced by the fan, and in addition, in order to facilitate system expansion, the main control module is provided with a unique identification number by adopting a code distribution switch, so that one field monitoring circuit board can communicate with a plurality of main control circuit boards. The controller is also provided with a standby power supply, and the standby power supply temporarily supplies power to the load under the condition that the battery pack of the power exchange station cannot normally supply power to the load.
An LCD display circuit is arranged in the main control module to provide an interpersonal interaction interface for a user, and the LCD display circuit is communicated with an LED indicator lamp, and a clock circuit is communicated in the LCD display circuit.
The LED indicator lamp is used for displaying power supply and other faults of the field monitoring module, the EEPROM circuit is used for storing historical data of the photovoltaic power generation system by the field monitoring module, and the detection circuit is used for preventing program disorder of the field monitoring module.
The control mode of the controller between the energy storage device of the power exchange station and the photovoltaic array module mainly comprises the following control scheme of alarming when the storage battery of the power exchange station is over-voltage, stopping charging and switching the power supply of the standby power supply, cutting off the charging branch step by step, enabling the action interval time to be 1 second to be adjustable, controlling the charging and discharging to be non-action, recovering the storage battery of the power exchange station to supply power to the load, putting the charging branch step by step, enabling the action interval time to be 30 seconds to be adjustable, switching the power supply to supply power, putting all the charging branch to charge, alarming when the storage battery of the power exchange station is under-voltage, stopping charging and switching the power supply of the standby power supply.
Wherein H1 is the over-charge alarming voltage value of the storage battery, H2 is the over-charge protection point voltage value of the storage battery, H3 is the over-discharge recovery point voltage value of the storage battery, L1 is the over-discharge protection point voltage value of the storage battery, and L2 is the over-discharge alarming voltage value of the storage battery. And comparing the voltage values, wherein H1> H2> H3> L1> L2. The battery voltage value is VB.
Because the battery performance of the battery replacement station in different enterprises is different in capacity, the internal charger timely collects temperature signals of the battery through the singlechip and the detection circuit to continuously adjust the voltage value of the overcharge protection point of the battery, and can adjust the voltage temperature compensation parameter values of the overcharge protection point according to the battery performance of different enterprises. Specifically, vf=vf 0+（T-T0) C, C is a voltage temperature coefficient.
The monitoring module adopts three-level measuring, controlling and managing modes, the highest level of the monitoring module is positioned at the monitoring background of the monitoring center, a PC (personal computer) is adopted, and the remote data transmission with the field monitoring module is realized by accessing a public telephone network through a MODEM. The monitoring background is connected with the subordinate monitoring module and then transmits the control instructions to the power station site monitoring module, wherein the control background comprises the acquisition of power station operation parameters such as storage battery voltage, storage battery temperature, charging current, load current, the highest and lowest voltage of the storage battery on the same day, the maximum charging current on the same day and the maximum discharging current;
The second level of the monitoring module is a field monitoring system, and the third level of the monitoring module is a field data acquisition system.
The task of the field monitoring system is data acquisition and signal control. The field monitoring system is a master-slave bus type measurement and control system based on an RS-485 field bus and a custom communication protocol, wherein a master control module and a field monitoring module are hung on the bus in a plug-in manner, and the master-slave bus type measurement and control system is uniformly managed by the field monitoring module. The system comprises a monitoring layer and a communication layer. The monitoring layer is responsible for receiving data uploaded by the bottom main control module to analyze and store the data, setting and modifying operation parameters of the main control module, inquiring real-time and historical data, realizing monitoring management of main control module equipment, and the communication layer is communicated with the field main control module in real time through a formulated communication protocol to complete data communication transmission, verification and the like. The on-site data acquisition system is also a part of the main control module of the independent photovoltaic power generation system and is used for acquiring the running state information of the independent photovoltaic power supply in real time, transmitting various information to the on-site monitoring module in a serial communication mode, and receiving and executing the instructions of the monitoring module.
The internal circuit of the photovoltaic array module is isolated by an optical coupler and is directly connected with the A/D chip circuit, the frequency of the system state information adopted by the singlechip is 200mS, and the system state information is adopted for 5 times in 1S, and then the data processing of the system state information is carried out.
The foregoing invention has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.

Claims (9)

1. The intelligent regulation control method of the photovoltaic module of the power exchange station comprises an intelligent regulation control system of the photovoltaic module of the power exchange station, the system further comprises a photovoltaic array module, a controller, an inverter and an alternating current load, wherein the photovoltaic array module, the controller, the inverter and the alternating current load are sequentially connected in sequence, the intelligent regulation control method is characterized in that the controller is additionally connected with an energy storage device of the power exchange station, the controller is connected with the inverter and is also connected with a direct current load, the photovoltaic array module consists of a plurality of photovoltaic cells, the controller is respectively connected with a main control module and a monitoring module, the main control module is connected with an upper computer in a data communication way, and the monitoring module is connected with a user and the controller,
The intelligent regulation control system of the photovoltaic module of the power conversion station acquires a battery overcharge alarm voltage value, a battery overcharge protection point voltage value, a battery overdischarge recovery point voltage value, a battery overdischarge protection point voltage value and a battery overdischarge alarm voltage value in an energy storage device system of the power conversion station, monitors whether the voltage values meet preset conditions, sends an alarm signal if the voltage values do not meet preset conditions, and cuts off a power supply.
2. The intelligent regulation control method of the photovoltaic module of the power exchange station is characterized in that the photovoltaic array module is connected with a PWM charging controller, a BUCK circuit is adopted by a main circuit topology structure of the PWM charging controller, the photovoltaic array module is connected with a temperature sensor, an IGBT in the PWM charging controller is directly connected when the temperature sensor alarms, pulse width modulation is adopted, the other path of the photovoltaic array module is connected with a freewheeling diode, and a Hall sensor is adopted for current and voltage isolation sampling.
3. The intelligent regulation control method of the photovoltaic module of the power exchange station of claim 1, wherein the core control device of the main control module in the controller is an AT89C52 single chip microcomputer, the single chip microcomputer controls a main circuit switch through an isolation driving circuit, the main control module stores system operation parameters and system operation state information through an EEPROM, a system program disorder is placed through a detection circuit, a system state is indicated through a state indication circuit, data communication is carried out between the main control module and an upper computer through an RS485 communication interface, and a fan is arranged in the main control module.
4. The intelligent regulation control method of the photovoltaic module of the power exchange station of claim 3, wherein an LCD display circuit is arranged in the main control module to provide a human interactive interface for a user, the LCD display circuit is connected with an LED indicator lamp, and a clock circuit is communicated in the LCD display circuit.
5. The intelligent regulation control method of the photovoltaic module of the power exchange station is characterized in that the control mode of the controller between the energy storage device of the power exchange station and the photovoltaic array module mainly comprises the following control scheme of alarming when the storage battery of the power exchange station is in overvoltage, stopping charging and switching the power supply of the standby power supply, cutting off the charging branch step by step, enabling the action interval time to be adjustable, enabling the storage battery of the power exchange station to be inactive, recovering the storage battery of the power exchange station to supply power to a load, putting the charging branch step by step, enabling the action interval time to be adjustable, switching the power supply of the standby power supply to supply power, putting all the charging branch circuits to charge, alarming when the storage battery of the power exchange station is in undervoltage, and stopping charging and switching the power supply of the standby power supply to supply.
6. The intelligent regulation control method of the photovoltaic module of the power exchange station of claim 5, wherein the monitoring module adopts three-level measurement, control and management modes, the highest level of the monitoring module is positioned at a monitoring background of a monitoring center, a PC (personal computer) is adopted, the monitoring background is connected with a public telephone network through a MODEM to realize remote data transmission with a field monitoring module, and the transmission after the monitoring background is connected with a lower monitoring module comprises the acquisition of operating parameters of the power station and the transmission of control instructions to the field monitoring module of the power station;
The second level of the monitoring module is a field monitoring system, and the third level of the monitoring module is a field data acquisition system.
7. The intelligent regulation control method of the photovoltaic module of the power exchange station of claim 1, wherein the internal circuit of the photovoltaic array module is isolated by an optical coupler and is directly connected with the A/D chip circuit, the frequency of the system state information adopted by the singlechip is 200mS, and the system state information can be acquired for a plurality of times in unit time and then the system state information data processing is performed.
8. The intelligent regulation control method for the photovoltaic module of the power exchange station according to any one of claims 1 to 7 is characterized in that the preset condition that the voltage value meets is voltage value comparison, namely:
And comparing the voltage values, namely H1> H2> H3> L1> L2, wherein H1 is the over-charge alarming voltage value of the storage battery, H2 is the over-charge protection point voltage value of the storage battery, H3 is the over-discharge recovery point voltage value of the storage battery, L1 is the over-discharge protection point voltage value of the storage battery, and L2 is the over-discharge alarming voltage value of the storage battery.
9. The intelligent regulation and control method of a photovoltaic module of a power exchange station according to any one of claims 1 to 7, further comprising a step of verifying voltage and temperature compensation of an overcharge protection point with adjustable battery performance, wherein the verification step satisfies the following conditions:
Vf=vf 0+（T-T0) C, where C is a voltage temperature coefficient, vf is a charge threshold voltage temperature value, vf 0 is a promotion battery temperature, T is a trickle charge start cycle time, and T 0 is a trickle charge upper cycle start time.
CN202510017917.0A 2025-01-06 2025-01-06 Intelligent regulation and control method for photovoltaic components in battery swap stations Pending CN119401626A (en)

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