CN115241864A - Parallel self-adjustment optimization control method for new energy ship power system - Google Patents
Parallel self-adjustment optimization control method for new energy ship power system Download PDFInfo
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/109—Scheduling or re-scheduling the operation of the DC sources in a particular order, e.g. connecting or disconnecting the sources in sequential, alternating or in subsets, to meet a given demand
-
- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
-
- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0238—Electrical distribution centers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/0315—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for using multiplexing techniques
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/106—Parallel operation of dc sources for load balancing, symmetrisation, or sharing
-
- 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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
-
- 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
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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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/42—The network being an on-board power network, i.e. within a vehicle for ships or vessels
Abstract
The invention provides a parallel self-adjusting optimization control method of a new energy ship power system, which relates to the technical field of new energy ship power system control and comprises the following steps: the host continuously monitors the power quality of the direct current bus in the operation process, controls to break the power supply loop and the daily load power supply loop when the power quality is abnormal, and controls to connect the power supply loop and the daily load power supply loop when the power quality is normal; the slave machine and the host machine are in normal communication, the slave machine receives set output power obtained by the host machine according to the real-time output power of each acquired direct current converter, the charge state of each battery pack and the electric energy quality in real time, and operates under the set output power; and the slave machine and the host machine can autonomously operate in a preset constant voltage mode when the slave machine and the host machine can not normally communicate. The method has the advantages that the integral power supply time of the ship power system is effectively prolonged; the mutual influence between the residential electricity and the ship power supply can be reduced, and the electric energy quality of the residential load power supply is improved.
Description
Technical Field
The invention relates to the technical field of control of new energy ship power systems, in particular to a parallel self-adjusting optimization control method of a new energy ship power system.
Background
The ship is one of the main transportation tools in the world, and the power system of the ship is called the heart of the ship, is power equipment arranged for ensuring the normal operation of the ship, and is used for providing various energies for the ship so as to ensure the normal navigation of the ship, the normal life of personnel and the completion of various operations.
The existing ship is powered by a diesel generator set, so that the operating and operation and maintenance cost is high, the noise and the environmental pollution are serious, and the existing ship cannot be effectively connected with a shore power system after entering a port. The ship adopts the energy storage system to supply power, so that the application cost can be reduced, the operation and maintenance workload can be reduced, and compared with a Chai Fa unit energy storage system, the energy storage system is environment-friendly and pollution-free. However, the power supply system of the electric ship usually adopts a plurality of groups of battery energy storage systems to supply power so as to meet the application requirements of ship power systems and daily resident loads, but most of the battery energy storage systems are mutually independently controlled, effective coordination control cannot be carried out between two groups of power supply systems, and the power supply capacity of the energy storage systems cannot be fully exerted.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a parallel self-adjusting optimization control method of a new energy ship power system, wherein the new energy ship power system comprises a power supply loop and a daily load power supply loop, the power supply loop and the daily load power supply loop both comprise a plurality of direct current converters, the low-voltage side of each direct current converter is connected with a corresponding battery pack, and the high-voltage side of each direct current converter is merged into a direct current bus; a communication network is formed among the direct current converters, one direct current converter is configured as a master computer, and the rest direct current converters are configured as slave computers; the parallel self-adjusting optimization control method comprises the following steps: step S1, the host continuously monitors the power quality of the direct current bus in the operation process and judges whether the power quality is abnormal: if yes, controlling to break the power supply circuit and the daily load power supply circuit, and then turning to the step S2; if not, controlling to connect the power supply loop and the daily load power supply loop, and then turning to the step S2; s2, the slave continuously judges whether the slave is normally communicated with the host: if so, the slave machine receives a set output power obtained by the host machine according to the acquired real-time output power of each direct current converter, the charge state of each battery pack and the electric energy quality in real time, and operates under the set output power; if not, the slave machine autonomously operates in a preset constant voltage mode.
Preferably, the step S1 includes: s11, continuously collecting bus voltage values of the direct current bus by the host, and adding each bus voltage value in each preset number of sampling periods into a voltage value set; step S12, the host extracts the minimum bus voltage value and the maximum bus voltage value in the voltage value set, and processes the minimum bus voltage value, the maximum bus voltage value and a preset rated voltage value to obtain a voltage fluctuation value; step S13, the host determines whether the voltage fluctuation value is smaller than a first threshold: if not, the power quality is represented to be abnormal, the power supply loop and the daily load power supply loop are controlled to be disconnected, and then the step S2 is turned to; if yes, the electric energy quality is represented to be normal, the power supply circuit and the daily load power supply circuit are controlled to be connected, and then the step S2 is turned to.
Preferably, in step S12, the voltage fluctuation value is calculated by the following formula:
wherein, the first and the second end of the pipe are connected with each other,
for representing the value of said voltage fluctuation,
for showing
The maximum bus voltage value within the sampling period,
for showing
A minimum value of said bus voltage within one of said sampling periods,
for representing the nominal voltage.
Preferably, in the step S1, the determining, by the host, that the power quality is abnormal further includes setting a power quality abnormal flag to 1, and determining that the power quality is normal further includes setting the power quality abnormal flag to 0; the process of the host processing the set output power includes: step A1, the host machine respectively judges whether the communication with each slave machine is normal: if yes, setting the communication state flag of each slave machine in normal communication to be 1, and then turning to the step A2; if not, setting the communication state flag of each slave machine in abnormal communication to be 0, and then turning to the step A2; step A2, the master machine takes the communication state mark of the slave machine belonging to the daily load power supply loop as a power regulation calculation mark of the corresponding slave machine, and the power regulation calculation mark of each slave machine belonging to the power supply loop is obtained by processing according to the electric energy quality abnormal mark and the communication state mark; and step A3, the host machine processes the acquired real-time output power of each slave machine, the charge state of each battery pack and each power regulation calculation mark in real time to obtain the set output power and sends the set output power to each slave machine in normal communication so as to control each corresponding slave machine to operate under the set output power.
Preferably, each slave has a preset label; in step A2, a calculation formula of the power adjustment calculation flag of each slave belonging to the power supply circuit is as follows:
wherein the content of the first and second substances,
for indicating that the preset reference number is
The power adjustment calculation flag of the slave,
for indicating that the preset reference number is
The communication status flag of the slave;
the power quality abnormity marker is used for representing the power quality abnormity marker.
Preferably, each slave has a preset label; in step A3, the calculation formula of the set output power is as follows:
wherein the content of the first and second substances,
wherein the content of the first and second substances,
for representing
At the moment, the preset label is
Of the slave device is set to the set output power,
for indicating that the preset reference number is
The power adjustment calculation flag of the slave,
for representing
At the moment, the preset label is
Is the real-time output power of the slave,
for indicating that the preset reference number is
Of the power rating of said slave machine,
for representing
At the moment, the preset label is
The slave to which the slave is correspondingly connected,
for indicating the total number of said slaves,
is the rated power of the main machine,
is the state of charge of the host.
Preferably, when the master determines that the slave is normally communicating with the master, before performing the step A2, the method further includes: step a11, the master respectively judges whether the slave in normal communication belongs to the daily load power supply loop: if yes, turning to the step A2; if not, turning to the step A12; step A12, the host machine judges whether the power supply loop and the daily load power supply loop are in a breaking state: if yes, turning to step A13; if not, turning to the step A2; step a13, the host obtains the power quality abnormal flag, and determines whether the power quality abnormal flag is 1: if yes, controlling the corresponding slave machine to operate in the constant voltage mode, and then returning to the step A11; if not, turning to the step A14; step a14, the master calculates a deviation value between the dc side voltage of the corresponding slave and the rated voltage of the dc bus, and determines whether the deviation value is greater than a second threshold: if yes, controlling the corresponding slave machine to operate in the constant voltage mode, and then returning to the step A11; if not, controlling to connect the power supply circuit and the daily load power supply circuit, and then turning to the step A2.
Preferably, a main switch is arranged between the power supply loop and the daily load power supply loop, and the main machine controls the connection of the power supply loop and the daily load power supply loop by controlling the closing of the main switch, and controls the disconnection of the main switch to break the power supply loop and the daily load power supply loop.
Preferably, the host operates autonomously in the constant voltage mode.
Preferably, the given voltage of the constant voltage mode is a rated voltage of the direct current bus.
The technical scheme has the following advantages or beneficial effects:
1) Under the normal communication condition, the SOC of each battery pack and the rated power of the direct current converter are comprehensively considered, the output power of each battery pack can be adjusted on line in real time, the output power of different battery packs is coordinated, the SOC of each battery pack is in a balanced state, and the integral power supply time of a ship power system is prolonged;
2) Under the condition that communication is abnormal, the direct current converter can automatically convert into constant voltage control to maintain the stability of a direct current bus, and automatically converts into a constant power control mode after communication is recovered;
3) When the voltage fluctuation of the direct-current bus is large, the daily load power supply and the power supply can be disconnected, mutual influence is prevented, the power supply system can automatically close the loop to operate after the voltage of the direct-current bus is recovered, the power consumption requirements and the load characteristics of resident power consumption and ship power supply are fully considered, the mutual influence between the resident power consumption and the ship power supply can be reduced, and the electric energy quality of resident load power supply is improved.
Drawings
FIG. 1 is a schematic diagram of a power system of a new energy vessel according to a preferred embodiment of the present invention;
FIG. 2 is a schematic flow chart of a parallel self-tuning optimization control method for a new energy vessel power system according to a preferred embodiment of the present invention;
FIG. 3 is a sub-flowchart of step S1 according to a preferred embodiment of the present invention;
FIG. 4 is a flow chart illustrating a process of obtaining a set output power by a host according to a preferred embodiment of the present invention;
fig. 5 is a flowchart illustrating the operation control of the slave in the normal communication between the master and the slave according to the preferred embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present invention is not limited to the embodiment, and other embodiments may be included in the scope of the present invention as long as the gist of the present invention is satisfied.
In a preferred embodiment of the present invention, based on the above problems in the prior art, there is provided a parallel self-adjusting optimization control method for a new energy vessel power system, as shown in fig. 1, the new energy vessel power system includes a power supply circuit 1 and a daily load supply circuit 2, each of the power supply circuit 1 and the daily load supply circuit 2 includes a plurality of dc converters, a low voltage side of each dc converter is connected to a corresponding battery pack, and a high voltage side of each dc converter is connected to a dc bus 3; a communication network is formed among the direct current converters, one direct current converter is configured as a master, and the rest direct current converters are configured as slaves; as shown in fig. 2, the parallel self-adjusting optimization control method includes: step S1, continuously monitoring the power quality of the direct current bus by the host in the operation process, and judging whether the power quality is abnormal: if yes, controlling to break the power supply circuit and the daily load power supply circuit, and then turning to the step S2; if not, controlling to connect the power supply circuit and the daily load power supply circuit, and then turning to the step S2; s2, the slave continuously judges whether the slave is normally communicated with the host: if so, the slave machine receives a set output power obtained by the host machine according to the acquired real-time output power of each direct current converter, the charge state of each battery pack and the electric energy quality in real time, and operates under the set output power; if not, the slave machine operates in a preset constant voltage mode.
Specifically, in this embodiment, a ring communication network is formed between the dc converters, and real-time communication between the dc converters can be realized, that is, two sides of each dc converter are respectively connected to one dc converter in a communication manner to form the ring communication network. As shown in fig. 1, two sides of the # 1 dc converter respectively perform information interaction with the # 2 dc converter and the # N dc converter, one side of the # 2 dc converter performs information interaction with the # 1 dc converter, the other side performs information interaction with the # 3 dc converter, and so on, so as to form a ring communication network. Each dc converter belonging to the power supply circuit 1 is connected to a corresponding battery pack through a sub-switch, respectively, to power each propulsion inverter including, but not limited to, a ship. The dc converters belonging to the daily load power supply circuit 2 are also connected to the corresponding battery packs through a sub-switch, respectively, to supply power to daily loads, including but not limited to the daily inverters of the ship.
For each direct current converter as a slave, as long as one side of the direct current converter is in normal communication, the direct current converter can be in normal communication with a host through a ring-shaped communication network, and as long as both sides of the direct current converter are in abnormal communication, the direct current converter is considered to be in abnormal communication with the host.
Further specifically, the main machine always operates in a constant voltage mode, the main machine monitors the power quality of the direct current bus 3 in real time in the operation process, if the power quality is abnormal, the power supply loop and the daily load power supply loop are controlled to be disconnected, mutual influence is prevented, and subsequently, if the power quality is recovered to be normal, the direct current side loop closing is automatically carried out, and the ship power system is connected to the direct current bus 3. Meanwhile, when the direct current converter serving as the slave is in normal communication with the host, the slave receives a host control instruction and operates under the set output power, wherein the host adjusts the set output power of different direct current converters according to the charge state and the power level of each battery pack. When the communication at both sides of the DC converter as the slave is abnormal, the DC converter can not communicate with the host, at the moment, the slave automatically converts into independent voltage control, namely operates in a constant voltage mode, and receives the control instruction of the host again after the communication is recovered.
Therefore, the SOC of the battery pack and the rated power of the direct current converter can be comprehensively considered under the normal communication condition, the set output power of each direct current converter can be adjusted on line in real time, the output power of each battery pack is further adjusted, the output of different battery packs is coordinated, the SOC of each battery pack is in a balanced state, and the integral power supply time of the ship power system is prolonged; under the condition that communication is abnormal, the direct current converter can automatically convert into constant voltage control, the stability of a direct current bus is maintained, and the direct current converter automatically converts into a constant power control mode after communication is recovered.
In a preferred embodiment of the present invention, as shown in fig. 3, step S1 includes: s11, continuously collecting the bus voltage value of the direct current bus by the host, and adding the bus voltage values in each preset number of sampling periods into a voltage value set; s12, extracting a minimum bus voltage value and a maximum bus voltage value from the voltage value set by the host, and processing according to the minimum bus voltage value, the maximum bus voltage value and a preset rated voltage value to obtain a voltage fluctuation value; step S13, the host machine judges whether the voltage fluctuation value is less than a first threshold value: if not, representing the abnormal quality of the electric energy, controlling to break the power supply loop and the daily load supply loop, and then turning to the step S2; if yes, the electric energy quality is represented to be normal, the power supply circuit and the daily load power supply circuit are controlled to be connected, and then the step S2 is turned to.
Specifically, in this embodiment, the preset number may be 10, that is, the host performs voltage fluctuation value calculation once every time the host acquires a bus voltage value of 10 sampling periods, and further performs power quality evaluation once. It is understood that the preset number can be customized according to the requirement. Taking 10 sampling periods as an example, in step S12, the following formula is used to extract the minimum bus voltage value and the maximum bus voltage value in the voltage value set:
wherein the content of the first and second substances,
for representing
The maximum bus voltage value within a sample period,
for representing
The minimum bus voltage value within a sample period,
for representing the bus voltage value of the current sampling period,
the bus voltage value used for representing the previous sampling period of the current sampling period, and the like.
In a preferred embodiment of the present invention, in step S12, the voltage fluctuation value is calculated as follows:
wherein the content of the first and second substances,
for indicating the value of the voltage fluctuation,
for representing
The maximum bus voltage value within a sample period,
for representing
The minimum bus voltage value within a sample period,
for indicating the nominal voltage.
In a preferred embodiment of the present invention, in step S1, the host computer further sets a power quality abnormal flag to 1 when determining that the power quality is abnormal, and sets the power quality abnormal flag to 0 when determining that the power quality is normal; as shown in fig. 4, the process of the host processing to obtain the set output power includes: step A1, the host machine respectively judges whether the communication with each slave machine is normal: if yes, setting the communication state flag of each slave machine in normal communication as 1, and then turning to the step A2; if not, setting the communication state flag of each slave machine in abnormal communication to be 0, and then turning to the step A2; step A2, the communication state mark of the slave machine belonging to the daily load power supply loop is used as a power regulation calculation mark of the corresponding slave machine by the host machine, and the power regulation calculation mark of each slave machine belonging to the power supply loop is obtained by processing according to the power quality abnormal mark and the communication state mark; and step A3, the host machine processes the acquired real-time output power of each slave machine, the charge state of each battery pack and each power regulation calculation mark in real time to obtain set output power and sends the set output power to each slave machine in normal communication so as to control each corresponding slave machine to operate under the set output power.
In a preferred embodiment of the present invention, each slave has a predetermined label; as in fig. 1 from the 1# dc converter to the N # dc converter, in step A2, the calculation formula of the power adjustment calculation flag of each slave belonging to the power supply circuit is as follows:
wherein, the first and the second end of the pipe are connected with each other,
for indicating a predetermined reference number of
The power adjustment calculation flag of the slave(s),
for indicating a predetermined reference number of
The communication status flag of the slave;
for indicating the power quality abnormality sign.
In a preferred embodiment of the present invention, each slave has a predetermined label; in step A3, the calculation formula for setting the output power is as follows:
wherein the content of the first and second substances,
wherein the content of the first and second substances,
for representing
The time preset label is
The set output power of the slave(s),
for indicating a predetermined reference number of
The power adjustment calculation flag of the slave(s),
for representing
The time preset label is
The real-time output power of the slave(s),
for indicating a predetermined reference number of
The rated power of the slave(s) of the system,
for showing
The time preset label is
The slave(s) of (a) corresponds to the state of charge of the connected battery pack,
for indicating the total number of slaves,
is the rated power of the main machine,
is the state of charge of the host.
In a preferred embodiment of the present invention, before the step A2 is executed when the master determines that the slave is in normal communication, as shown in fig. 5, the method further includes: step A11, the host machine respectively judges whether the slave machines in normal communication belong to a daily load power supply loop: if yes, turning to the step A2; if not, turning to the step A12; step A12, the host machine judges whether the power supply loop and the daily load power supply loop are in a breaking state: if yes, turning to step A13; if not, turning to the step A2; step A13, the host computer obtains the power quality abnormal mark, and judges whether the power quality abnormal mark is 1: if yes, controlling the corresponding slave machine to operate in a constant voltage mode, and then returning to the step A11; if not, turning to the step A14; step a14, the master calculates a deviation value between the dc side voltage of the corresponding slave and the rated voltage of the dc bus, and determines whether the deviation value is greater than a second threshold: if yes, controlling the corresponding slave to operate in the constant voltage mode, and then returning to the step A11; if not, controlling to connect the power supply circuit and the daily load power supply circuit, and then turning to the step A2.
In a preferred embodiment of the present invention, a main switch QS5 is disposed between the power supply circuit and the daily load supply circuit, and the main machine controls the main switch QS5 to be closed to control the connection between the power supply circuit and the daily load supply circuit, and controls the main switch QS5 to be opened to disconnect the power supply circuit and the daily load supply circuit.
In a preferred embodiment of the present invention, the host operates autonomously in a constant voltage mode.
In a preferred embodiment of the invention, the given voltage of the constant voltage mode is a rated voltage of the dc bus, which is preferably 750V.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The parallel self-adjusting optimization control method of the new energy ship power system is characterized in that the new energy ship power system comprises a power supply loop and a daily load power supply loop, wherein the power supply loop and the daily load power supply loop respectively comprise a plurality of direct current converters, the low-voltage side of each direct current converter is connected with a corresponding battery pack, and the high-voltage side of each direct current converter is merged into a direct current bus; a communication network is formed among the direct current converters, one direct current converter is configured as a master, and the rest direct current converters are configured as slaves; the parallel self-adjusting optimization control method comprises the following steps: step S1, the host continuously monitors the power quality of the direct current bus in the running process and judges whether the power quality is abnormal: if yes, controlling to break the power supply circuit and the daily load power supply circuit, and then turning to the step S2; if not, controlling to connect the power supply loop and the daily load power supply loop, and then turning to the step S2; s2, the slave continuously judges whether the slave is normally communicated with the host: if so, the slave machine receives a set output power obtained by the host machine according to the acquired real-time output power of each direct current converter, the charge state of each battery pack and the electric energy quality in real time, and operates under the set output power; if not, the slave machine autonomously operates in a preset constant voltage mode.
2. The parallel self-adjusting optimization control method according to claim 1, wherein the step S1 comprises: s11, continuously collecting bus voltage values of the direct current bus by the host, and adding each bus voltage value in each preset number of sampling periods into a voltage value set; step S12, the host extracts the minimum bus voltage value and the maximum bus voltage value in the voltage value set, and processes the minimum bus voltage value, the maximum bus voltage value and a preset rated voltage value to obtain a voltage fluctuation value; step S13, the host determines whether the voltage fluctuation value is smaller than a first threshold: if not, the power quality is represented to be abnormal, the power supply loop and the daily load power supply loop are controlled to be disconnected, and then the step S2 is turned to; if yes, the electric energy quality is represented to be normal, the power supply circuit and the daily load power supply circuit are controlled to be connected, and then the step S2 is turned to.
3. The parallel self-adjusting optimization control method according to claim 2, wherein in the step S12, the voltage fluctuation value is calculated according to the following formula:
wherein the content of the first and second substances,
for indicating the value of said voltage fluctuation,
for representing
The maximum bus voltage value within the sampling period,
for showing
A minimum value of said bus voltage within one of said sampling periods,
for representing the nominal voltage.
4. The parallel self-adjusting optimization control method according to claim 1, wherein in step S1, the determining, by the host, that the power quality is abnormal further includes setting a power quality abnormal flag to 1, and the determining that the power quality is normal further includes setting the power quality abnormal flag to 0; the process of the host processing the set output power includes: step A1, the host machine respectively judges whether the communication with each slave machine is normal: if yes, setting the communication state flag of each slave machine in normal communication to be 1, and then turning to the step A2; if not, setting the communication state flag of each slave machine in abnormal communication to be 0, and then turning to the step A2; step A2, the master machine takes the communication state mark of the slave machine belonging to the daily load power supply loop as a power regulation calculation mark of the corresponding slave machine, and the power regulation calculation mark of each slave machine belonging to the power supply loop is obtained by processing according to the electric energy quality abnormal mark and the communication state mark; and step A3, the host machine processes the acquired real-time output power of each slave machine, the charge state of each battery pack and each power regulation calculation mark in real time to obtain the set output power and sends the set output power to each slave machine in normal communication so as to control each corresponding slave machine to operate under the set output power.
5. The parallel self-adjusting optimization control method of claim 4, wherein each slave has a predetermined label; in step A2, a calculation formula of the power adjustment calculation flag of each slave belonging to the power supply circuit is as follows:
wherein the content of the first and second substances,
for indicating that the preset reference number is
The power adjustment calculation flag of the slave,
for indicating said predetermined reference numeral as
The communication status flag of the slave;
the power quality abnormity marker is used for representing the power quality abnormity marker.
6. The parallel self-adjusting optimization control method of claim 4, wherein each slave has a preset label; in step A3, the calculation formula of the set output power is as follows:
wherein, the first and the second end of the pipe are connected with each other,
wherein the content of the first and second substances,
for representing
At the moment, the preset label is
Of the slave device is set to the set output power,
for indicating that the preset reference number is
The power adjustment calculation flag of the slave,
for representing
At the moment, the preset label is
Is the real-time output power of the slave,
for indicating that the preset reference number is
Of the power rating of said slave machine(s),
for representing
At the moment, the preset label is
The slave to which the slave is correspondingly connected,
for indicating the total number of said slaves,
is the rated power of the main machine,
is the state of charge of the host.
7. The parallel self-adjusting optimization control method according to claim 4, wherein when the master determines that the slave is in normal communication, before performing the step A2, the method further comprises: step A11, the master machine respectively judges whether the slave machines in normal communication belong to the daily load power supply loop: if yes, turning to the step A2; if not, turning to the step A12; step A12, the host machine judges whether the power supply loop and the daily load power supply loop are in a breaking state: if yes, turning to step A13; if not, turning to the step A2; step A13, the host acquires the power quality abnormal mark, and judges whether the power quality abnormal mark is 1: if yes, controlling the corresponding slave to operate in the constant voltage mode, and then returning to the step A11; if not, turning to the step A14; step a14, the master calculates a deviation value between the dc side voltage of the corresponding slave and the rated voltage of the dc bus, and determines whether the deviation value is greater than a second threshold: if yes, controlling the corresponding slave to operate in the constant voltage mode, and then returning to the step A11; if not, controlling to connect the power supply circuit and the daily load power supply circuit, and then turning to the step A2.
8. The parallel self-adjusting optimization control method according to claim 1, wherein a main switch is arranged between the power supply loop and the daily load power supply loop, and the main machine controls the main switch to be closed to control the power supply loop and the daily load power supply loop to be connected and controls the main switch to be opened to disconnect the power supply loop and the daily load power supply loop.
9. The parallel self-adjusting optimization control method of claim 1, wherein the main machine operates autonomously in the constant voltage mode.
10. The parallel self-regulating optimization control method according to claim 1, 7 or 9, wherein the given voltage of the constant voltage mode is a rated voltage of the dc bus.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112193091A (en) * | 2020-12-07 | 2021-01-08 | 澄瑞电力科技（上海）有限公司 | Automatic power supply control system and method for electric ship |
| US11031785B1 (en) * | 2018-05-24 | 2021-06-08 | Mikhail Valerievich Erokhovets | Device and method for intelligent control of power supply source connection |
| CN113394865A (en) * | 2021-08-05 | 2021-09-14 | 集美大学 | Self-adaptive inertia matching method for deep-open-sea ship hydrogen storage direct-current electric propulsion system |
| CN113937747A (en) * | 2021-11-26 | 2022-01-14 | 中船动力研究院有限公司 | Energy control system and method for direct-current networking ship hybrid laboratory |
-
2022
- 2022-09-20 CN CN202211140438.0A patent/CN115241864B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11031785B1 (en) * | 2018-05-24 | 2021-06-08 | Mikhail Valerievich Erokhovets | Device and method for intelligent control of power supply source connection |
| CN112193091A (en) * | 2020-12-07 | 2021-01-08 | 澄瑞电力科技（上海）有限公司 | Automatic power supply control system and method for electric ship |
| CN113394865A (en) * | 2021-08-05 | 2021-09-14 | 集美大学 | Self-adaptive inertia matching method for deep-open-sea ship hydrogen storage direct-current electric propulsion system |
| CN113937747A (en) * | 2021-11-26 | 2022-01-14 | 中船动力研究院有限公司 | Energy control system and method for direct-current networking ship hybrid laboratory |
Non-Patent Citations (2)
| Title |
|---|
| 丁燕等: "抗随机干扰的船舶动力系统混合控制方法", 《舰船科学技术》 * |
| 叶子等: "散货码头四象限高压岸电系统", 《港口科技》 * |
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