CN114784925A - Method for charging energy storage system for ship by using energy storage power supply for ship - Google Patents
Method for charging energy storage system for ship by using energy storage power supply for ship Download PDFInfo
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- CN114784925A CN114784925A CN202210688326.2A CN202210688326A CN114784925A CN 114784925 A CN114784925 A CN 114784925A CN 202210688326 A CN202210688326 A CN 202210688326A CN 114784925 A CN114784925 A CN 114784925A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—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
-
- 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
- B60L2200/00—Type of vehicles
- B60L2200/32—Waterborne vessels
-
- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a method for charging a marine energy storage system by using a marine energy storage power supply, wherein the marine energy storage power supply is a marine energy storage battery, namely the method is used for establishing a quick charge and discharge channel between the marine energy storage battery and a charger and realizing quick transfer of electric energy between the marine energy storage battery and the charger; the method comprises a charge and discharge control device for controlling the charge and discharge of a charger and a battery control device for controlling the energy storage battery for the ship, wherein the charge and discharge control device comprises a charge controller; the method comprises a charging circuit establishing stage, an insulation detecting stage, a pre-charging preparation stage, a charging stage and a charging finishing stage. The method for charging the energy storage system for the ship by using the energy storage power supply for the ship enables the ship to be charged and supplemented quickly at a port, improves charging power and charging efficiency, can supplement power for the energy storage power supply by using the time of stopping the ship and other passengers, and improves the effective carrying time of the ship.
Description
Technical Field
The invention relates to the technical field of charging, in particular to a method for charging a marine energy storage system by using a marine energy storage power supply.
Background
The existing inland river or lake ships use diesel engines as power systems, and have the defects of high pollution, high energy consumption, non-renewable fossil energy consumption and the like, so that the inland river or lake ships become a big and middle problem in ports and even the whole water transportation industry.
With the proposal of energy conservation and emission reduction in China, the implementation of the whole inland river or lake shipping policy is increasingly intensified, and inland river ships mainly use energy storage batteries instead of domestic electricity at present, and adopt shore power when ports are parked and the like. The pure electric ship is provided, and has the advantages of energy saving, silence, no water pollution and the like as a novel inland river transportation tool. The power system of the pure electric ship is changed into a full electric mode, and the energy storage battery is adopted for electric energy storage. The pure electric ship adopts an energy storage power supply to supply power to a power system of the pure electric ship. The conventional electric ship is basically modified from the conventional hull, and the power mechanism is modified to be an electric or hybrid structure. Purely electric boats are only on small vessels, such as yachts. In order to solve this problem, the energy storage power source is used on a large ship, and the charging power and the charging time must be considered.
At present, the charging connection scheme of the electric automobile is basically used for charging the energy storage battery for the ship, and the defects of small charging power, short charging time, complex manual operation, limitation of professionals and the like exist in the modes of shore electric piles, battery replacement modules and the like.
Disclosure of Invention
The invention mainly aims to provide a method for charging a marine energy storage system by using a marine energy storage power supply, and provides a high-power charging method for driving energy storage by a pure electric ship, so that the ship can be charged and supplemented quickly at a port, the charging power and the charging efficiency are improved, and the complexity of manual operation and the professional limitation of personnel are reduced.
In order to realize the purpose, the invention adopts the technical scheme that:
a method for charging a marine energy storage system by using a marine energy storage power supply is characterized in that the marine energy storage power supply is a marine energy storage battery, namely the method is used for establishing a quick charge and discharge channel between the marine energy storage battery and a charger and realizing quick transfer of electric energy between the marine energy storage battery and the charger; the method comprises a charge and discharge control device for controlling the charge and discharge of a charger and a battery control device for controlling the energy storage battery for the ship, wherein the charge and discharge control device comprises a charge controller; the method comprises a charging circuit establishing stage, an insulation detecting stage, a preparation stage before charging, a charging stage and a charging ending stage;
in the charging circuit establishment stage, a charging plug of a charger is connected with a socket of a marine energy storage battery, then, a charging voltage U1 is set at a charging controller, the charging controller measures a voltage value U of a detection point, and compares the U with a U1 to judge whether the charging plug is completely connected with the socket, the resistance of the socket end is R1, and the resistance of the charging plug end is R2; when the voltage value U at the detection point is
If so, judging that the charging plug is completely connected with the socket; establishing a low-voltage auxiliary power supply loop, a direct-current power supply loop and a charging loop;
in the insulation detection stage, after a charging plug is completely connected with a socket, a charging and discharging control device carries out self-detection, in the process, a low-voltage auxiliary power supply loop is connected in a pilot mode, then a direct-current power supply loop is connected, insulation detection equipment is connected in for insulation detection, after the insulation detection is finished, the insulation detection equipment is physically separated from a strong-current loop, after the self-detection is finished, the charging and discharging control device disconnects the low-voltage auxiliary power supply loop, and meanwhile, a communication handshake message is periodically sent; entering a preparation stage before charging;
in the preparation stage before charging, the battery control device is matched with the charging and discharging control device, the battery control device controls the conduction of a charging loop, and the charging and discharging control device detects the voltage of the energy storage battery for the ship and conducts a direct current power supply loop after the voltage is normal; entering a charging stage;
in the charging stage, the battery control device sends charging demand parameters of the marine energy storage battery to the charging and discharging control device in real time, wherein the charging demand parameters comprise required charging current values; in the charging stage, the charging and discharging control device detects the actual charging current value, compares the actual charging current value with the required charging current value to obtain the difference value of the actual charging current value and the required charging current value, and takes the absolute value of the difference value as
And according to
Adjusts the actual charging current value, i.e. when
Adjusting the actual charging current value to be consistent with the required charging current value within 1 s; when the temperature is higher than the set temperature
When it is used, the longest is
Adjusting the actual charging current value to be consistent with the required charging current value within s;
at a minimum charge rate of 20A/s; through the method, the charging and discharging control device adjusts the actual charging voltage and the actual charging current in real time according to the charging demand parameters of the energy storage battery for the ship; in addition, the battery control device and the charge and discharge control device also mutually transmit respective state information;
in the charging ending stage, the battery control device judges whether to end charging according to whether the energy storage battery for the ship reaches a full charging state or whether a charging stopping message of a charger is received; when the charging end condition is met, the battery control device starts to periodically send a message that the battery control device stops charging, and a charging loop is disconnected after the charging current is confirmed to be less than 5A; when the charging end condition set by an operator is met or a charging stopping message of the battery control device is received, the charging and discharging control device periodically sends the charging stopping message of the charger and controls the charger to stop charging and reduce the charging current at a rate not less than 100A/s, and when the charging current is less than or equal to 5A, the direct current power supply loop is disconnected; when the operator implements a charging stop instruction, the charging and discharging control device starts to periodically send a charging stop message to the charger, controls the charger to stop charging, and disconnects the direct-current power supply loop after confirming that the charging current is less than 5A, and then disconnects the low-voltage auxiliary power supply loop.
Preferably, in the charging stage, if the charging and discharging control device has a fault that the charging cannot be continued, a charger stop charging message is periodically sent to the marine energy storage battery, the charger is controlled to stop charging, and the direct current power supply loop and the low-voltage auxiliary power supply loop are cut off within 100 ms.
Preferably, in the charging stage, if the marine energy storage battery has a fault that the charging cannot be continued, a battery charge stopping message is sent to the charging and discharging control device, and the charging loop is disconnected within 300 ms.
Preferably, in the charging stage, if the communication timeout occurs in the charging and discharging control device, the charger stops charging, and the direct current power supply loop and the charging loop are cut off within 10 s; if the communication is interrupted after the charging and discharging control device is subjected to communication overtime for 3 times, the charger stops charging, and the direct current power supply loop, the low-voltage auxiliary power supply loop and the charging loop are cut off within 10 s.
Preferably, in the charging stage, the charge and discharge control device detects the voltage at the detection point, and if the charging interface is judged to be disconnected from the full connection, the charge machine is controlled to stop charging, and the direct current power supply loop and the low-voltage auxiliary power supply loop are disconnected within 100 ms.
Preferably, in the charging stage, if the output voltage of the charger is greater than the maximum allowable total charging voltage of the energy storage battery for the ship, the charger stops charging within 1s, and the direct-current power supply loop and the low-voltage auxiliary power supply loop are disconnected.
Preferably, in the insulation detection stage, the insulation detection device is an IMD circuit arranged at a charger end, i.e., an insulation detection circuit, and is responsible for insulation inspection; the insulation detection equipment tests the insulation resistance value between the DC + and PE and the insulation resistance value between DC-PE, and sets the minimum value of the two insulation resistance values as R when
The security is regarded as safe;
when in use, the insulation abnormity alarm is carried out, but the charging can be normally carried out;
the charging should be stopped when an insulation fault is detected.
Compared with the prior art, the invention has the following beneficial effects:
1. by using the method, the driving energy storage system of the inland ship is generally a large energy storage power supply of several megawatts or dozens of megawatts, the docking time of the inland ship at a port is limited, the rapid charging can ensure normal auxiliary power supply and driving energy storage power supplement, and the system can be charged within hours even in the power replacement process.
2. On the lake ferry ship, the charging method can supplement power to the energy storage power supply by using the time of berthing the ship and the like, and improves the utilization rate of the ship and the effective carrying time.
3. The charging mode of high voltage and large current can meet the charging of a ship energy storage power supply with dozens of megawatts or larger, so that the charging time is shortened.
4. The reliable connection mode and the strict control logic guarantee that the blank of the charging mode of the energy storage power supply for the large ship is filled.
Drawings
Fig. 1 is an overall structural view illustrating a method for charging a marine energy storage system using a marine energy storage power supply according to the present invention;
FIG. 2 is a flowchart illustrating a charging termination determination under abnormal conditions according to the present invention;
fig. 3 is a flowchart of abnormal charging according to the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained by combining the specific embodiments.
Example 1:
as shown in fig. 1-3, a method for charging a marine energy storage system using a marine energy storage power source, in which the marine energy storage power source is a marine energy storage battery, that is, the method is used for establishing a fast charge and discharge channel between the marine energy storage battery and a charger, and realizing fast transfer of electric energy between the marine energy storage battery and the charger; the method comprises a charge and discharge control device for controlling the charge and discharge of a charger and a battery control device for controlling the energy storage battery for the ship, wherein the charge and discharge control device comprises a charge controller; the method comprises a charging circuit establishing stage, an insulation detecting stage, a pre-charging preparation stage, a charging stage and a charging ending stage.
In the stage of establishing a charging circuit, a charging plug of a charger is connected with a socket of a marine energy storage battery, then, a charging voltage U1 is set at a charging controller, the charging controller measures a voltage value U of a detection point, and compares the U with the U1 to judge whether the charging plug is completely connected with the socket, the resistance of the socket end is R1, and the resistance of the charging plug end is R2; when the voltage value U at the detection point is
If so, judging that the charging plug is completely connected with the socket; and establishing a low-voltage auxiliary power supply loop, a direct-current power supply loop and a charging loop.
As shown in fig. 1, on-off switches of the dc power supply circuit are a contactor K1 and a contactor K2, on-off switches of the low-voltage auxiliary power supply circuit are a contactor K3 and a contactor K4, and on-off switches of the charging circuit are a contactor K5 and a contactor K6.
In the insulation detection stage, after a charging plug is completely connected with a socket, a charging and discharging control device carries out self-detection, in the process, a contactor K3 and a contactor K4 are closed firstly, a low-voltage auxiliary power supply loop is conducted, then a contactor K1 and a contactor K2 are closed, a direct-current power supply loop is conducted, insulation detection equipment is connected in through a contactor K1 and a contactor K2 to carry out insulation detection, after the insulation detection is finished, the contactor K1 and the contactor K2 are disconnected, the insulation detection equipment is separated from a strong-current loop in a physical mode, and after the self-detection is finished, the charging and discharging control device disconnects the contactor K3 and the contactor K4, so that the low-voltage auxiliary power supply loop is disconnected, and meanwhile, a handshake cycle is started to send communication messages; entering a pre-charging preparation phase.
In the preparation stage before charging, the battery control device is matched with the charging and discharging control device, the battery control device controls the contactor K5 and the contactor K6 to be closed, so that the charging loop is controlled to be conducted, the charging and discharging control device detects the voltage of the energy storage battery for the ship, and after the voltage is normal, the contactor K1 and the contactor K2 are closed, so that the direct-current power supply loop is conducted; and entering a charging phase.
In the charging stage, the battery control device sends charging demand parameters of the marine energy storage battery to the charging and discharging control device in real time, wherein the charging demand parameters comprise required charging current values; in the charging stage, the charging and discharging control device detects the actual charging current value, compares the actual charging current value with the required charging current value, obtains the difference value of the actual charging current value and the required charging current value, and obtains the absolute value of the difference value
According to
Adjusts the actual charging current value, i.e. when
Adjusting the actual charging current value to be consistent with the required charging current value within 1 s; when in use
When it is used, the longest is
Adjusting the actual charging current value to be consistent with the required charging current value within s;
at a minimum charge rate of 20A/s; through the method, the charging and discharging control device adjusts the actual charging voltage and the actual charging current in real time according to the charging demand parameters of the energy storage battery for the ship; further, the battery control device and the charge/discharge control device transmit their respective state information to each other.
In the charging end stage, the battery control device judges whether to end charging according to whether the marine energy storage battery reaches a full-charge state or whether a charging stopping message of a charger is received; when the above charging end conditions are met, the battery control device starts to periodically send a message that the battery control device stops charging, and after the charging current is confirmed to be less than 5A, the contactor K5 and the contactor K6 are opened, so that a charging loop is disconnected; when the charging end condition set by an operator is met or a charging stopping message of the battery control device is received, the charging and discharging control device periodically sends the charging stopping message of the charger and controls the charger to stop charging and reduce the charging current at a rate not less than 100A/s, and when the charging current is less than or equal to 5A, the contactor K1 and the contactor K2 are disconnected, so that a direct-current power supply loop is disconnected; when the operator implements a command of stopping charging, the charging and discharging control device starts to periodically send a message of stopping charging by the charger, controls the charger to stop charging, disconnects the contactor K1 and the contactor K2 after confirming that the charging current is less than 5A, thereby disconnecting the direct current power supply loop, and then disconnects the contactor K3 and the contactor K4, thereby disconnecting the low-voltage auxiliary power supply loop.
It should be noted that, in the insulation detection stage, the insulation detection device is an IMD circuit arranged at the charger end, that is, an insulation detection circuit, and is responsible for insulation inspection; the insulation detection equipment tests the insulation resistance value between the charging direct current loop DC + and the charging direct current loop PE and the insulation resistance value between the DC-and the PE, and electrically connects the two insulated circuitsThe minimum value of the resistance is set as R when
The security is regarded as safe;
when the battery is charged, the battery is preferably subjected to insulation abnormity alarm, but can still be charged normally;
the charging should be stopped, considering an insulation fault.
In the charging stage, if a part of the charging circuit fails, the charging needs to be stopped; the charge interruption occurring during the charging period is referred to as end of charging under abnormal conditions, and the charging form in which a failure has occurred is referred to as abnormal charging.
In the charging stage, if the charging and discharging control device has a fault that the charging cannot be continued, a charger stop charging message is sent to the energy storage battery for the ship periodically, the charger is controlled to stop charging, and the contactor K1, the contactor K2, the contactor K3 and the contactor K4 are switched off within 100ms, so that the direct-current power supply loop and the low-voltage auxiliary power supply loop are switched off.
In the charging stage, if the marine energy storage battery has a fault that the charging cannot be continued, a battery charging stopping message is sent to the charging and discharging control device, and the contactor K5 and the contactor K6 are disconnected within 300ms, so that the charging loop is disconnected.
In the charging stage, if the communication timeout occurs in the charging and discharging control device, the charger stops charging, and disconnects the contactor K1, the contactor K2, the contactor K5 and the contactor K6 within 10s, so that the direct current power supply loop and the charging loop are disconnected; when the charging and discharging control device confirms that the communication is interrupted after 3 times of communication overtime, the charger stops charging, and the contactor K1, the contactor K2, the contactor K3, the contactor K4, the contactor K5 and the contactor K6 are disconnected within 10s, so that the direct current power supply loop, the low-voltage auxiliary power supply loop and the charging loop are disconnected.
In the charging phase; the charging and discharging control device detects the voltage of a detection point, and if the charging interface is judged to be disconnected from the full connection, the charging machine is controlled to stop charging, and the contactor K1, the contactor K2, the contactor K3 and the contactor K4 are disconnected within 100ms, so that the direct-current power supply loop and the low-voltage auxiliary power supply loop are disconnected.
In the charging stage, if the output voltage of the charger is greater than the maximum allowable total charging voltage of the energy storage battery for the ship, the charger stops charging within 1s, and disconnects the contactor K1, the contactor K2, the contactor K3 and the contactor K4, so that the direct-current power supply loop and the low-voltage auxiliary power supply loop are disconnected.
The invention provides a high-power charging method for the drive energy storage of a pure electric ship, so that the ship can realize quick charging and electricity supplement at a port, the charging efficiency is greatly improved, and the utilization rate of the ship and the effective carrying time are improved.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A method for charging a marine energy storage system by using a marine energy storage power supply is characterized in that in the method, the marine energy storage power supply is a marine energy storage battery, namely, the method is used for establishing a fast charge and discharge channel between the marine energy storage battery and a charger and realizing fast transfer of electric energy between the marine energy storage battery and the charger; the method comprises a charge and discharge control device for controlling the charge and discharge of a charger and a battery control device for controlling the energy storage battery for the ship, wherein the charge and discharge control device comprises a charge controller; the method comprises a charging circuit establishing stage, an insulation detecting stage, a preparation stage before charging, a charging stage and a charging finishing stage;
in a charging circuitThe method comprises the steps that in the establishing stage, a charging plug of a charger is connected with a socket of a marine energy storage battery, then, a charging voltage U1 is set at a charging controller, the charging controller measures a voltage value U of a detection point, the U and the U1 are compared, whether the charging plug is completely connected with the socket or not is judged, the resistance of a socket end is R1, and the resistance of a charging plug end is R2; when the voltage value U at the detection point is
If so, judging that the charging plug is completely connected with the socket; establishing a low-voltage auxiliary power supply loop, a direct-current power supply loop and a charging loop;
in the insulation detection stage, after a charging plug is completely connected with a socket, a charging and discharging control device performs self-detection, in the process, a low-voltage auxiliary power supply loop is connected in a pilot mode, then a direct-current power supply loop is connected, insulation detection equipment is connected to perform insulation detection, the insulation detection equipment is physically separated from a strong current loop after the insulation detection is finished, and after the self-detection is finished, the charging and discharging control device disconnects the low-voltage auxiliary power supply loop and simultaneously starts to periodically send a communication handshake message; entering a preparation stage before charging;
in the preparation stage before charging, the battery control device is matched with the charging and discharging control device, the battery control device controls the conduction of a charging loop, and the charging and discharging control device detects the voltage of the energy storage battery for the ship and conducts a direct current power supply loop after the voltage is normal; entering a charging stage;
in the charging stage, the battery control device sends charging demand parameters of the marine energy storage battery to the charging and discharging control device in real time, wherein the charging demand parameters comprise a required charging current value; in the charging stage, the charging and discharging control device detects the actual charging current value, compares the actual charging current value with the required charging current value to obtain the difference value of the actual charging current value and the required charging current value, and takes the absolute value of the difference value as
And according to
Is adjusted to the actual charging current value, i.e. when
Adjusting the actual charging current value to be consistent with the required charging current value within 1s as long as the charging time is up; when in use
At the longest in
Adjusting the actual charging current value to be consistent with the required charging current value within s;
at a minimum charge rate of 20A/s; through the above, the charging and discharging control device adjusts the actual charging voltage and the actual charging current in real time according to the charging demand parameters of the marine energy storage battery; in addition, the battery control device and the charge and discharge control device also mutually transmit respective state information;
in the charging end stage, the battery control device judges whether to end charging according to whether the marine energy storage battery reaches a full-charge state or whether a charging stopping message of a charger is received; when the charging end condition is met, the battery control device starts to periodically send a message that the battery control device stops charging, and a charging loop is disconnected after the charging current is confirmed to be less than 5A; when the charging end condition set by an operator is met or a charging stopping message of the battery control device is received, the charging and discharging control device periodically sends the charging stopping message of the charger and controls the charger to stop charging and reduce the charging current at a rate not less than 100A/s, and when the charging current is less than or equal to 5A, the direct current power supply loop is disconnected; when the operator implements a charging stop instruction, the charging and discharging control device starts to periodically send a charging stop message to the charger, controls the charger to stop charging, disconnects the direct current power supply loop after confirming that the charging current is less than 5A, and then disconnects the low-voltage auxiliary power supply loop.
2. The method for charging the energy storage system of the ship by using the energy storage power supply of the ship as claimed in claim 1, wherein in the charging phase, if the charging and discharging control device has a failure that the charging cannot be continued, a charging stop message is sent to the charger periodically, the charger is controlled to stop charging, and the dc power supply loop and the low-voltage auxiliary power supply loop are cut off within 100 ms.
3. The method for charging the energy storage system of the ship using the energy storage power supply of the ship as claimed in claim 1, wherein in the charging phase, if the energy storage battery of the ship fails to be charged continuously, a message of stopping charging the battery is sent to the charging and discharging control device, and the charging loop is cut off within 300 ms.
4. The method for charging the energy storage system for the ship by using the energy storage power supply for the ship as claimed in claim 1, wherein in the charging stage, if the communication timeout occurs in the charging and discharging control device, the charger stops charging, and the direct current power supply loop and the charging loop are cut off within 10 s; if the communication is interrupted after the charging and discharging control device is subjected to communication overtime for 3 times, the charger stops charging, and the direct current power supply loop, the low-voltage auxiliary power supply loop and the charging loop are cut off within 10 s.
5. The method for charging the energy storage system of the ship using the energy storage power supply of the ship as claimed in claim 1, wherein the charging and discharging control device detects the voltage at the detection point during the charging phase, and if the charging interface is determined to be changed from a full connection to a disconnection, the charging machine is controlled to stop charging, and the dc power supply loop and the low-voltage auxiliary power supply loop are disconnected within 100 ms.
6. The method of charging a marine energy storage system using a marine energy storage power supply according to claim 1, wherein: in the charging stage, if the output voltage of the charger is greater than the highest allowable total charging voltage of the energy storage battery for the ship, the charger stops charging within 1s, and the direct current power supply loop and the low-voltage auxiliary power supply loop are disconnected.
7. The method of charging a marine energy storage system using a marine energy storage power supply according to claim 1, wherein: in the insulation detection stage, the insulation detection equipment is an IMD circuit arranged at the end of the charger, namely an insulation detection circuit, and is responsible for insulation inspection; the insulation detection equipment tests the insulation resistance value between DC + and PE and the insulation resistance value between DC-PE of the charging direct current loop, and sets the minimum value of the two insulation resistance values as R when
The security is regarded as safe;
when in use, the insulation abnormity alarm is carried out, but the charging can be normally carried out;
the charging should be stopped, considering an insulation fault.
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