CN113937747A - Energy control system and method for direct-current networking ship hybrid laboratory - Google Patents

Energy control system and method for direct-current networking ship hybrid laboratory Download PDF

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Publication number
CN113937747A
CN113937747A CN202111419144.7A CN202111419144A CN113937747A CN 113937747 A CN113937747 A CN 113937747A CN 202111419144 A CN202111419144 A CN 202111419144A CN 113937747 A CN113937747 A CN 113937747A
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CN
China
Prior art keywords
mode
control system
hybrid
power
direct current
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CN202111419144.7A
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Chinese (zh)
Inventor
马烁凯
叶飞
熊庆文
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China Shipbuilding Power Engineering Institute Co Ltd
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China Shipbuilding Power Engineering Institute Co Ltd
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Priority to CN202111419144.7A priority Critical patent/CN113937747A/en
Publication of CN113937747A publication Critical patent/CN113937747A/en
Priority to PCT/CN2022/115433 priority patent/WO2023093172A1/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H02J1/12—Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
    • 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
    • H02J1/14—Balancing the load in a network
    • 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
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

The embodiment of the invention discloses an energy control system and method for a direct-current networking ship hybrid laboratory. The energy control system includes: the state acquisition module is connected with the diesel generator set, the lithium battery pack, the super capacitor, the propulsion motor, the first direct current bus and the second direct current bus and used for acquiring the operation information of the diesel generator set; the PLC main controller comprises a signal acquisition input end and a control output end, and the signal acquisition input end is electrically connected with the state acquisition module; the control output end is connected with the control ends of the rectification power distribution cabinet, the chopping cabinet and the inverter power supply cabinet, and performs energy control on the diesel generator set, the lithium battery pack and the propulsion motor. Compared with the prior art, the embodiment of the invention is beneficial to realizing the high-efficiency distribution of the energy of the direct-current networking ship hybrid laboratory.

Description

Energy control system and method for direct-current networking ship hybrid laboratory
Technical Field
The embodiment of the invention relates to the technical field of ships, in particular to an energy control system and method for a direct-current networking ship hybrid laboratory.
Background
At present, a ship electric propulsion system basically adopts an alternating current networking mode, the electric energy loss is high and the energy utilization rate is low in the power generation, grid connection and distribution processes of electric energy, and the alternating current system is vibrated in the grid connection process.
The direct current network distribution mode gathers the electric energy together through the direct current bus, redistributes for relevant load and use, and direct current load is direct to be supplied power or step-down power supply by the direct current bus, and alternating current load passes through the converter and becomes the alternating current power supply with direct current electric energy reversal, has saved the process of exchanging the electric network. Meanwhile, the direct-current networking power distribution mode has the advantages of low loss, high electric energy quality, high energy distribution management efficiency and the like, and can be connected into new energy power supplies such as lithium batteries and photovoltaic power supplies, so that the defects of low energy utilization rate, slow energy conversion and the like of the alternating-current networking power distribution mode are overcome.
In recent years, electric propulsion ships are increasingly researched in a direct-current networking power distribution mode, but a management scheme for realizing efficient energy distribution is not mature when multiple energy sources are simultaneously connected into a power grid, and research on energy management of direct-current networking power distribution is a key for realizing efficient energy utilization rate.
Disclosure of Invention
The embodiment of the invention provides an energy control system and a control method of a direct-current networking ship hybrid laboratory, which are used for realizing efficient energy distribution.
In a first aspect, an embodiment of the present invention provides an energy control system for a dc networking ship hybrid laboratory, including:
the rectification power distribution cabinet is connected between the diesel generating set and the first direct current bus and between a plant area power grid and the first direct current bus;
the chopper cabinets are connected between the lithium battery pack and the first direct current bus and between the super capacitor and the first direct current bus;
the inverter power supply cabinet is connected between the first direct current bus and the propulsion motor and between the first direct current bus and the second direct current bus; the second direct current bus is used for supplying power to an electric load;
the state acquisition module is connected with the diesel generator set, the lithium battery pack, the super capacitor, the propulsion motor, the first direct current bus and the second direct current bus and is used for acquiring the operation information of the diesel generator set;
the PLC main controller comprises a signal acquisition input end and a control output end, and the signal acquisition input end is electrically connected with the state acquisition module; the control output end is connected with the control ends of the rectification power distribution cabinet, the chopping cabinet and the inverter power supply cabinet, and is used for carrying out energy control on the diesel generator set, the lithium battery pack and the propulsion motor.
Optionally, the PLC master controller employs a redundant PLC architecture.
Optionally, the energy control system of the dc networking ship hybrid laboratory further includes: the device comprises an analog quantity input module, an analog quantity output module, a digital quantity input module and a digital quantity output module;
the analog quantity input module and the digital quantity input module are both electrically connected with the input end of the PLC main controller and are used for matching the analog quantity and the digital quantity output by the state acquisition module with the PLC main controller;
the analog quantity output module and the digital quantity output module are both electrically connected with the output end of the PLC main controller and are used for converting signals output by the PLC main controller into analog quantity and digital quantity matched with controlled equipment.
Optionally, the PLC master controller communicates with the controlled device through at least one of the following communication interfaces: the system comprises an Ethernet communication interface module, a CAN communication interface module and an industrial field bus protocol communication interface module.
Optionally, the energy control system of the dc networking ship hybrid laboratory further includes:
the human-computer interface interaction device is electrically connected with the PLC main controller; the human-computer interface interaction device is used for performing at least one of control operation, parameter setting, running state and alarm display functions of the engineering production management system according to signals of the PLC main controller.
Optionally, the state acquisition module includes: the unit management unit is configured on the diesel generator set;
and/or, the state acquisition module comprises: a battery management system configured with the lithium battery pack.
Optionally, the energy control system of the direct-current networking ship hybrid laboratory further comprises a transformer; and the rectification power distribution cabinet is electrically connected with a plant area power grid through the transformer.
Optionally, the inverter power cabinet and the second dc bus are electrically connected through a transformer;
and the plant area power grid is electrically connected with the second direct current bus through the transformer and is also used for simulating an emergency generator set.
Optionally, the energy control system of the dc networking ship hybrid laboratory further includes:
the third direct current bus is connected between the second direct current bus and the control circuit; and the uninterrupted power supply is electrically connected with the second direct current bus.
In a second aspect, an embodiment of the present invention further provides a control method for an energy control system in a hybrid laboratory of a direct-current networked ship, which is applicable to the energy control system in the hybrid laboratory of the direct-current networked ship provided in any embodiment of the present invention, and the control method includes:
collecting operation information of the diesel generator set, the lithium battery pack, the super capacitor, the propulsion motor, the plant power grid, the first direct current bus and the second direct current bus;
controlling the control system to operate in at least one of the following modes according to the operation information: the pure electric mode is switched to the other modes, the single diesel engine hybrid mode is switched to the other modes, the double diesel engine hybrid mode is switched to the other modes, the single diesel engine hybrid mode is switched to the other modes, and the single diesel engine hybrid mode is switched to the other modes and the double diesel engine hybrid mode is switched to the other modes.
Optionally, the control method further includes: an engineering production management system mode and a shore power mode;
the engineering production management system mode comprises an automatic mode, a semi-automatic mode and a manual mode; under the automatic mode, the operation mode of the control system is automatically switched; in the semi-automatic mode, the operation mode of the control system realizes manual auxiliary automatic switching; and in the manual mode, the operation mode of the control system realizes manual switching.
Optionally, before the acquiring step, the method further comprises:
power-on detection, including software self-detection and hardware self-detection;
judging whether the bus voltage is established; if yes, executing the subsequent steps, otherwise, executing the step of establishing the bus voltage.
Optionally, the operating conditions of the pure electric mode include: the charge state of a super capacitor of the lithium battery pack is greater than a first set value, and the power of a system electric load is less than a second set value;
and/or, the operating conditions of the single diesel mode include: the state of charge of a super capacitor of the lithium battery pack is smaller than the first set value, and the power of the system electric load is smaller than the second set value;
and/or the operating conditions of the double-diesel mode comprise: the state of charge of a super capacitor of the lithium battery pack is smaller than the first set value, and the power of the system electric load is larger than the second set value;
and/or the operating conditions of the single-diesel hybrid mode comprise: the state of charge of a super capacitor of the lithium battery pack is greater than the first set value, and the power of the system electric load is less than the second set value;
and/or the operating conditions of the double-diesel hybrid mode comprise: the charge state of the super capacitor of the lithium battery pack is larger than the first set value, and the power of the system electric load is larger than the second set value.
The energy control system of the ship hybrid laboratory through the direct current networking comprises: the multi-energy access and intelligent electric energy management and distribution control system comprises a rectification power distribution cabinet, a chopping cabinet, an inverter power supply cabinet, a state acquisition module and a PLC main controller, and realizes multi-energy access, electric energy management and intelligent distribution control of a direct-current networking ship hybrid laboratory. Particularly, the comprehensive management of energy can be carried out on a diesel generator set, energy storage equipment, a rectification power distribution cabinet, an inverter power supply cabinet, a chopping cabinet, a propulsion motor, an electric load and the like, and the energy distribution of the whole ship hybrid power laboratory is optimized and the energy conversion is efficient.
Drawings
Fig. 1 is a schematic structural diagram of an energy control system of a dc networking ship hybrid laboratory according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of connection between an energy control system and a power supply device in a dc networking ship hybrid laboratory according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an energy control system of another dc networking vessel hybrid laboratory according to an embodiment of the present invention;
fig. 4 is an energy control system of a dc networking ship hybrid laboratory according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a control method of an energy control system of a dc networking ship hybrid laboratory according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of a control method of an energy control system of a dc networking ship hybrid laboratory according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a main logic control method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The invention provides an energy control system of a direct-current networking ship hybrid laboratory. Fig. 1 is a schematic structural diagram of an energy control system of a dc networking ship hybrid laboratory according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of connection between the energy control system of the dc networking ship hybrid laboratory and a power supply device according to an embodiment of the present invention. Referring to fig. 1 and 2, the energy control system of the dc networking ship hybrid laboratory comprises: the system comprises a rectification power distribution cabinet 110(AC/DC), a chopper cabinet 120(DC/DC), an inverter power supply cabinet 130(DC/AC), a state acquisition module 140 and a PLC main controller 150. The rectification power distribution cabinet 110 is connected between a Diesel Generator set 200 (DG, short for a Diesel Generator set) and the first dc bus 300, and between a plant grid and the first dc bus 300; the chopper cabinet 120 is connected between the lithium battery pack 400 and the first direct current bus bar 300, and between the super capacitor and the first direct current bus bar 300; the inverter power cabinet 130 is connected between the first dc bus 300 and a propulsion Motor 500(Motor, for example, a variable frequency Motor), and between the first dc bus 300 and the second dc bus 600; the second dc bus 600 is used to supply power to an electric load (e.g., the resistive load box 700). The state acquisition module 140 is connected to the diesel generator set 200, the lithium battery pack 400, the super capacitor, the propulsion motor 500, the first dc bus 300, and the second dc bus 600, and is configured to acquire operation information thereof. The PLC main controller 150 includes a signal acquisition input terminal and a control output terminal, and the signal acquisition input terminal is electrically connected to the state acquisition module 140; the control output end is connected with the control ends of the rectification power distribution cabinet 110, the chopper cabinet 120 and the inverter power supply cabinet 130, and performs energy control on the diesel generator set 200, the lithium battery pack 400 and the propulsion motor 500.
The PLC main Controller 150 may be a Programmable Logic Controller (PLC). The rectification power distribution cabinet 110, the chopper cabinet 120, and the inverter power supply cabinet 130 constitute a dc power distribution board. The direct-current networking ship hybrid power laboratory needs to comprise power generation equipment such as a diesel generator set 200, energy storage equipment such as a lithium battery pack 400, propulsion equipment such as a propulsion motor 500, daily load equipment such as an electric load, shore-based charging equipment and the like so as to meet the experiment target of ship hybrid motion. Wherein, the shore power is simulated by adopting a factory power grid. The state collecting module 140 is provided with different state collecting units according to different device types, and for example, the state collecting module 140 includes: the system comprises a unit management unit and a battery management system, wherein the unit management unit is configured on the diesel generator set 200; the battery management system is disposed in the lithium battery pack 400.
Accordingly, the whole power core system demonstration and verification platform controlled by the energy management system is composed of the following subsystems: a diesel generator set 200 system; a direct current power distribution system; an energy storage system; an electric propulsion system; a shore-based charging system; a commodity load system; an energy management control system. Illustratively, the diesel genset 200 system includes a diesel generator, a genset management unit, and a controller; the energy storage system comprises a lithium battery pack 400, a battery management system and a controller; the electric propulsion system comprises a variable frequency motor and an eddy current dynamometer 800, and forms a rear propulsion system in an inverter (frequency converter), variable frequency motor and eddy current dynamometer 800 mode. The diesel generator set 200 system provides a power source for the whole power system, and the output power and the output voltage of the diesel generator set 200 in the hybrid power core system determine the design scale of the whole hybrid power core system and the type of the ship which can be covered. Illustratively, a hybrid power laboratory of a direct-current networking ship adopts two 500kW and 690V diesel generator sets 200 to provide power sources; the voltage of the first DC bus 300 in the DC power distribution system is 1000V DC.
The rectification power distribution cabinet 110 includes a generator set rectifier, and the generator set rectifier is connected between the diesel generator set 200 and the first dc bus 300, rectifies the ac power generated by the diesel generator set 200, and outputs 1000VDC to the first dc bus 300. The rectification power distribution cabinet 110 further comprises a grid-side rectifier, wherein the grid-side rectifier is connected between a plant area grid and the first direct current bus 300 and is used for simulating the condition of shore connection when a ship is in a port, and 690V alternating current is converted into 1000V direct current by using the grid-side rectifier.
The chopper cabinet 120 includes a bidirectional DC/DC converter connected between the lithium battery pack 400 and the first DC bus 300, and completes the charge and discharge processes of the energy storage devices such as the lithium battery pack 400, and prevents overcharge and overdischarge through the control of the PLC main controller 150. The lithium battery pack 400 mainly plays a role in peak clipping and valley filling, and can instantly absorb or release energy when the load of the power system fluctuates, so that the stability of the system is enhanced, and meanwhile, the hybrid power system works at an economic operation point. Illustratively, 2 lithium batteries 400 were used, each set of 160kWh, 1C charge-discharge rate.
The inverter power cabinet 130 includes a propulsion motor 500 inverter, the propulsion motor 500 inverter is connected between the first dc bus 300 and the propulsion motor 500, illustratively, the propulsion motor 500 is a variable frequency motor, and the propulsion motor 500 inverter controls the rotation speed and the torque of the variable frequency motor through the control of the PLC main controller 150. The inverter power cabinet 130 further includes a daily load inverter connected between the first dc bus 300 and the second dc bus 600. Illustratively, the daily load inverter is an inverter that inverts 1000V dc to 380V 50Hz fixed voltage/frequency ac, simulating a daily load on a ship.
The energy management system functions as: the control mainly functions in power regulation and load distribution, so that load balance between a power supply side and a load side is realized, and stable operation of a power grid is ensured. The system has the functions of load state monitoring, frequency converter state monitoring, overvoltage and undervoltage monitoring, overcurrent monitoring, power generation unit fault monitoring, lithium battery electric quantity monitoring, lithium battery charging indication, power limiting, unloading, overload inquiry, fault disconnection, emergency shutdown and the like.
Illustratively, the control method of the energy control system includes collecting operation information of the diesel generator set 200, the lithium battery pack 400, the super capacitor, the propulsion motor 500, the first direct current bus 300 and the second direct current bus 600; according to the operation information, the control system is controlled to operate in at least one of the following modes: the pure electric mode is switched to the other modes, the single diesel engine hybrid mode is switched to the other modes, the double diesel engine hybrid mode is switched to the other modes, the single diesel engine hybrid mode is switched to the other modes, and the single diesel engine hybrid mode is switched to the other modes and the double diesel engine hybrid mode is switched to the other modes.
The energy control system of the ship hybrid laboratory through the direct current networking comprises: the multi-energy access and intelligent electric energy management and distribution control system comprises a rectification power distribution cabinet 110, a chopper cabinet 120, an inverter power supply cabinet 130, a state acquisition module 140 and a PLC main controller 150, and realizes multi-energy access and intelligent electric energy management and distribution control of a direct-current networking ship hybrid laboratory. Specifically, the comprehensive management of energy can be performed on the diesel generator set 200, the energy storage device, the rectification power distribution cabinet 110, the inverter power supply cabinet 130, the chopper cabinet 120, the propulsion motor 500, the electric load and the like, so that the energy distribution of the whole ship hybrid power laboratory is optimized, and the energy conversion is efficient.
With continued reference to fig. 2, based on the above embodiments, the energy control system of the dc networking ship hybrid laboratory optionally further includes a transformer a 00; the rectification switch board 110 is electrically connected with the plant area power grid through a transformer A00.
With continued reference to fig. 2, based on the above embodiments, optionally, the inverter power cabinet 130 and the second dc bus 600 are electrically connected through a transformer a 00; and the plant area power grid is electrically connected with the second direct current bus 600 through a transformer A00, and the plant area power grid is also used for simulating an emergency generator set.
With continued reference to fig. 2, on the basis of the foregoing embodiments, optionally, the energy control system of the dc networking ship hybrid laboratory further includes: a third dc bus connected between the second dc bus 600 and the control unit; the ups is electrically connected to the second dc bus 600. Optionally, the third dc bus and the second dc bus 600 are electrically connected through a transformer a 00. The third dc bus and the transformer a00 constitute an ac distribution board.
With reference to fig. 2, on the basis of the foregoing embodiments, optionally, the load box is used to simulate the ac electrical load of the ship, and the daily load characteristics of the ship can be restored through the resistance-sensing load box 700. The motor 900 is adopted to simulate the pump and the valve, so that the influence of the starting of the pump and the valve on the DC power distribution system can be simulated. In daily load of boats and ships, there are power equipment such as a lot of pumps, valves, and its start-up is in the twinkling of an eye, and starting current can reach 5 ~ 8 times of rated value, and is great to the influence of direct current distribution system.
With continued reference to fig. 2, on the basis of the foregoing embodiments, optionally, the energy control system of the dc networking ship hybrid laboratory further includes: the fuse B00 and the breaker C00 are connected between the devices for line protection and switching.
Fig. 3 is a schematic structural diagram of an energy control system of another dc networking ship hybrid laboratory according to an embodiment of the present invention. Referring to fig. 3, on the basis of the foregoing embodiments, optionally, the PLC main controller 150 adopts a redundant PLC architecture, that is, two sets of PLC main controllers 150 are adopted. The two sets of PLC master controllers 150 operate independently and stand-by for each other. One set of PLC master controller 150 functions as a master controller, while the other set of PLC master controller 150 remains operating as a standby controller. The standby controller output will be automatically switched to the primary controller upon failure of the primary controller. By the arrangement, the stability and the reliability of the hybrid laboratory operation of the direct-current networking ship are improved.
On the basis of the foregoing embodiments, optionally, the energy control system of the dc networking ship hybrid laboratory further includes: the device comprises an analog quantity input module, an analog quantity output module, a digital quantity input module and a digital quantity output module. The analog input module and the digital input module are electrically connected to an input terminal of the PLC main controller 150, and are configured to match the analog quantity and the digital quantity output by the state acquisition module 140 with the PLC main controller 150. The analog quantity output module and the digital quantity output module are both electrically connected with the output end of the PLC main controller 150 and are used for converting the signals output by the PLC main controller 150 into analog quantity and digital quantity matched with the controlled equipment. By the arrangement, the reliability of transmission of the operation information and the control signal is improved.
On the basis of the above embodiments, optionally, each diesel generator is configured with an independent unit management module to provide protection for the diesel generator. And simultaneously, parameters such as voltage, frequency and the like of the diesel generator are independently monitored. If a certain diesel generator in operation has high-voltage, low-voltage, high-frequency, low-frequency and other faults, the PLC main controller 150 performs automatic tripping control on a main switch of the corresponding fault diesel generator set.
On the basis Of the above embodiments, optionally, each group Of energy storage systems is configured with a BMS (Battery Management System) System to provide protection for the energy storage Battery System, and monitor parameters Of the energy storage System, such as voltage, current, temperature, power, SOC (Super Capacitor State Of Charge), and the like. If some group battery that operates breaks down, PLC main control unit 150 carries out the automatic operation that withdraws from of corresponding trouble lithium cell group owner.
Fig. 4 is a diagram illustrating an energy control system of a dc networking ship hybrid laboratory according to an embodiment of the present invention. Referring to fig. 4, on the basis of the foregoing embodiments, optionally, the energy control system of the dc networking ship hybrid laboratory further includes a human-computer interface interaction device 160. The human-computer interface interaction device 160 is electrically connected with the PLC main controller 150; the human-machine interface interaction device 160 is used for performing at least one of control operation, parameter setting, operation state and alarm display function of the engineering production management system according to the signal of the PLC main controller 150. Illustratively, the human-machine interface device 160 is disposed on the console, and can perform related PMS (Power Production Management System) control operations, parameter settings, operation states, and alarm displays.
On the basis of the above embodiments, optionally, the PLC main controller 150 communicates with the controlled device through at least one of the following communication interfaces: the system comprises an Ethernet communication interface module, a CAN communication interface module and an industrial field bus protocol communication interface module so as to carry out real-time synchronous communication. Illustratively, two sets of PLC main controllers 150 are connected by optical fibers, and an internal private protocol is used to implement the main controller redundancy configuration. The PLC main controller 150 and the dc power distribution cabinet controller (including the rectification power distribution cabinet 110, the chopper cabinet 120, and the inverter power supply cabinet 130) adopt an industrial fieldbus protocol, such as a Modbus-TCP communication protocol, and adopt an RJ45 interface. A controller area network protocol, namely a CAN communication protocol, is adopted between the PLC main controller 150 and the energy storage system controller. A CAN communication protocol is used between the chopper cabinet 120 and the energy storage system controller. An industrial field bus protocol, such as a Modbus-RTU (485) communication protocol, is used between the PLC master controller 150 and the diesel-electric set system controller. A begary proprietary protocol and the like is adopted between the PLC main controller 150 and the human-machine interface interaction device 160.
On the basis of the above embodiments, optionally, the energy control system reserves a certain spare signal output input interface for expanding and upgrading or replacing the control program.
In summary, the embodiment of the present invention includes a redundant PLC main controller 150, an analog input module, an analog output module, a digital input module, a digital output module, an ethernet communication interface module, a CAN communication interface module, and the like. The energy control system adopts a redundant PLC architecture, mainly communicates with each device through Ethernet, respectively collects the running information and the state information of the devices such as a diesel generator set, a lithium battery pack, a super capacitor, a plant area power grid, a direct current distribution board, an alternating current distribution board, a propulsion motor, an eddy current dynamometer and the like, mainly comprises analog quantities such as voltage and current of each device, digital quantities of a switching state and the like, and finally interacts an analysis data result to each device through the Ethernet through calculation and analysis to complete data communication and control.
Specifically, the PLC main controller 150 in the energy management cabinet collects information on the operation, shutdown, state, and the like of the ship-wide electrical equipment, collects voltage and current flowing through each switch, and can control switching on and off of the switches on all the ac power distribution boards, thereby implementing a control method including switching a pure electric mode to a remaining mode module, switching a single diesel engine hybrid mode to a remaining mode module, switching a double diesel engine hybrid mode to a remaining mode module, switching a single diesel engine power mode to a remaining mode module, and switching a double diesel engine power mode to a remaining mode module.
The embodiment of the invention also provides a control method of the energy control system of the direct-current networking ship hybrid laboratory, the control method is suitable for the energy control system of the direct-current networking ship hybrid laboratory provided by any embodiment of the invention, and the control method has corresponding beneficial effects.
Fig. 5 is a schematic flow chart of a control method of an energy control system of a dc networking ship hybrid laboratory according to an embodiment of the present invention. Referring to fig. 5, the control method of the energy control system of the direct-current networking ship hybrid laboratory comprises the following steps:
s110, collecting operation information of the diesel generator set, the lithium battery pack, the super capacitor, the propulsion motor, the plant area power grid, the first direct current bus and the second direct current bus.
S120, controlling the control system to operate in at least one of the following modes according to the operation information: the pure electric mode is switched to the other modes, the single diesel engine hybrid mode is switched to the other modes, the double diesel engine hybrid mode is switched to the other modes, the single diesel engine hybrid mode is switched to the other modes, and the single diesel engine hybrid mode is switched to the other modes and the double diesel engine hybrid mode is switched to the other modes.
On the basis of the foregoing embodiments, optionally, before the acquiring step, the method further includes: power-on detection, including software self-detection and hardware self-detection; judging whether the bus voltage is established; if yes, executing the subsequent steps, otherwise, executing the step of establishing the bus voltage. Fig. 6 is a schematic flow chart of a control method of an energy control system of a dc networking ship hybrid laboratory according to an embodiment of the present invention. Referring to fig. 6, specifically, the control method includes the steps of: entering a program; self-checking software, if the self-checking result is normal, performing hardware self-checking, otherwise reporting an error and jumping out; if the hardware self-checking result is normal, judging whether the first bus voltage is established, otherwise, reporting an error and jumping out; if the first bus voltage is established, entering a main logic program, otherwise establishing the bus voltage; and after the main logic control is jumped out, judging whether the machine is stopped, if so, jumping out, and otherwise, re-entering.
On the basis of the foregoing embodiments, optionally, the control method further includes: an engineering production management system mode and a shore power mode; the engineering production management system mode comprises an automatic mode, a semi-automatic mode and a manual mode; under the automatic mode, the running mode of the control system realizes automatic switching; in a semi-automatic mode, the operation mode of the control system realizes manual auxiliary automatic switching; and in the manual mode, the operation mode of the control system realizes manual switching. Fig. 7 is a flowchart illustrating a main logic control method according to an embodiment of the present invention. Referring to fig. 7, specifically, the control method includes the steps of: entering a program; judging whether the mode is an automatic mode, if so, judging whether the mode is started for the first time, and if not, judging whether the mode is a semi-automatic mode; if the power supply is started for the first time, automatically selecting a second power supply mode, and otherwise, automatically selecting a first power supply mode; if the mode is the semi-automatic mode, manually selecting the power mode, otherwise, judging whether the mode is the manual mode; after the first power mode is automatically selected, the second power mode is automatically selected or the power modes are manually selected, automatic power distribution, information processing, uploading and jumping out are carried out; if the mode is the manual mode, processing and uploading information, and jumping out, otherwise, judging whether the mode is the shore power mode; if the shore power mode is adopted, entering shore power logic, processing information, uploading and jumping out; otherwise, processing and uploading the information, and jumping out.
The first power mode automatic selection, the second power mode automatic selection, the power mode manual selection and the like all comprise at least one of the mode of switching the pure electric mode to the rest mode, the mode of switching the single diesel engine hybrid mode to the rest mode, the mode of switching the double diesel engine hybrid mode to the rest mode, the mode of switching the single diesel engine power mode to the rest mode and the mode of switching the double diesel engine power mode to the rest mode, and the setting can be carried out according to the requirements in practical application. According to the embodiment of the invention, by setting the operation modes such as the automatic mode, the semi-automatic mode, the manual mode and the like, the start-stop, grid-connection and off-grid control can be carried out on the power generation units such as the diesel generator set and the like according to the load condition, so that the relatively economic and reasonable operation mode is realized. The semi-automatic mode and the manual mode require professional operators to operate, and specifically can be displayed and operated by a touch screen through a human-computer operation interface.
On the basis of the foregoing embodiments, optionally, the operation conditions of the pure electric mode include: the charge state of a super capacitor of the lithium battery pack is greater than a first set value, and the power of a system electric load is less than a second set value;
and/or, the operating conditions of the single-firewood mode include: the charge state of a super capacitor of the lithium battery pack is smaller than a first set value, and the power of a system electric load is smaller than a second set value;
and/or, the operating conditions of the double-diesel mode comprise: the charge state of a super capacitor of the lithium battery pack is smaller than a first set value, and the power of a system electric load is larger than a second set value;
and/or, the operating conditions of the single-diesel hybrid mode comprise: the charge state of a super capacitor of the lithium battery pack is greater than a first set value, and the power of a system electric load is less than a second set value;
and/or, the operating conditions of the double-diesel hybrid mode comprise: the charge state of a super capacitor of the lithium battery pack is larger than a first set value, and the power of a system electric load is larger than a second set value.
The first set value and the second set value may be set as required, the state of charge of the super capacitor, i.e., SOC, the first set value may be, for example, 10% to 50% of a rated SOC value, and the second set value may be, for example, 50% to 100% of a rated power value of a system electrical load. Then, correspondingly, the power mode switching control strategy of the energy control system is:
if the SOC of the energy storage system is larger than a set value (10% -50%, which can be set) and the power of the system electric load is smaller than the set value (50% -100%, which can be set), the system operates in a pure electric mode;
if the SOC of the energy storage system is less than a set value (10% -50%, which can be set) and the power of the system electric load is less than a set value (50% -100%, which can be set), the system operates in a single diesel engine mode; if the power of the system power load is greater than a set value (50-100%, the power can be set), the system operates in a double-diesel-engine mode;
the SOC of the energy storage system is larger than a set value (10% -50%, which can be set), and the power of the system power load is smaller than a set value (50% -100%, which can be set), so that the system runs in a single-diesel hybrid mode; if the power of the system power load is larger than a set value (50-100%, the power can be set), the system operates in a double-diesel hybrid mode;
the shore power mode is switched in manually, and once the shore power mode is switched in, other modes are not effective.
On the basis of the foregoing embodiments, optionally, the control method further includes: the parking/emergency generator set can perform uninterrupted load transfer with any one of the main power supplies (diesel generator sets) during short-time grid connection.
On the basis of the foregoing embodiments, optionally, the control method further includes: in order to ensure the power supply continuity under the abnormal condition of a power grid, the power of a propulsion system is subjected to steady-state power limitation and transient state rapid reduction of the propulsion power according to the load rate and the switching state of a unit, so that the situation that the overload of a generator is caused by sudden load change to cause the power failure of the whole ship to influence the safety of the ship is prevented.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (13)

1. The utility model provides an energy control system of mixed dynamic laboratory of direct current network deployment boats and ships which characterized in that includes:
the rectification power distribution cabinet is connected between the diesel generating set and the first direct current bus and between a plant area power grid and the first direct current bus;
the chopper cabinets are connected between the lithium battery pack and the first direct current bus and between the super capacitor and the first direct current bus;
the inverter power supply cabinet is connected between the first direct current bus and the propulsion motor and between the first direct current bus and the second direct current bus; the second direct current bus is used for supplying power to an electric load;
the state acquisition module is connected with the diesel generator set, the lithium battery pack, the super capacitor, the propulsion motor, the first direct current bus and the second direct current bus and is used for acquiring the operation information of the diesel generator set;
the PLC main controller comprises a signal acquisition input end and a control output end, and the signal acquisition input end is electrically connected with the state acquisition module; the control output end is connected with the control ends of the rectification power distribution cabinet, the chopping cabinet and the inverter power supply cabinet, and is used for carrying out energy control on the diesel generator set, the lithium battery pack and the propulsion motor.
2. The energy control system of the dc networking vessel hybrid laboratory according to claim 1, wherein the PLC master controller employs a redundant PLC architecture.
3. The energy control system of the dc networking vessel hybrid laboratory according to claim 1, further comprising: the device comprises an analog quantity input module, an analog quantity output module, a digital quantity input module and a digital quantity output module;
the analog quantity input module and the digital quantity input module are both electrically connected with the input end of the PLC main controller and are used for matching the analog quantity and the digital quantity output by the state acquisition module with the PLC main controller;
the analog quantity output module and the digital quantity output module are both electrically connected with the output end of the PLC main controller and are used for converting signals output by the PLC main controller into analog quantity and digital quantity matched with controlled equipment.
4. The energy control system of the direct-current networking ship hybrid laboratory according to claim 1, wherein the PLC main controller communicates with the controlled equipment through at least one of the following communication interfaces: the system comprises an Ethernet communication interface module, a CAN communication interface module and an industrial field bus protocol communication interface module.
5. The energy control system of the dc networking vessel hybrid laboratory according to claim 1, further comprising:
the human-computer interface interaction device is electrically connected with the PLC main controller; the human-computer interface interaction device is used for performing at least one of control operation, parameter setting, running state and alarm display functions of the engineering production management system according to signals of the PLC main controller.
6. The energy control system of the dc networking vessel hybrid laboratory according to claim 1, wherein the state acquisition module comprises: the unit management unit is configured on the diesel generator set;
and/or, the state acquisition module comprises: a battery management system configured with the lithium battery pack.
7. The energy control system of the dc networking vessel hybrid laboratory according to claim 1, further comprising a transformer; and the rectification power distribution cabinet is electrically connected with a plant area power grid through the transformer.
8. The energy control system of the direct-current networking ship hybrid laboratory, according to claim 7, wherein the inverter power cabinet and the second direct-current bus are electrically connected through a transformer;
and the plant area power grid is electrically connected with the second direct current bus through the transformer and is also used for simulating an emergency generator set.
9. The energy control system of the dc networking vessel hybrid laboratory according to claim 1, further comprising:
the third direct current bus is connected between the second direct current bus and the control circuit; and the uninterrupted power supply is electrically connected with the second direct current bus.
10. A control method of an energy control system of a dc networking vessel hybrid laboratory according to claim 1, comprising:
collecting operation information of the diesel generator set, the lithium battery pack, the super capacitor, the propulsion motor, the plant power grid, the first direct current bus and the second direct current bus;
controlling the control system to operate in at least one of the following modes according to the operation information: the pure electric mode is switched to the other modes, the single diesel engine hybrid mode is switched to the other modes, the double diesel engine hybrid mode is switched to the other modes, the single diesel engine hybrid mode is switched to the other modes, and the single diesel engine hybrid mode is switched to the other modes and the double diesel engine hybrid mode is switched to the other modes.
11. The method for controlling the energy control system of the hybrid laboratory of direct-current networked ships according to claim 10, further comprising: an engineering production management system mode and a shore power mode;
the engineering production management system mode comprises an automatic mode, a semi-automatic mode and a manual mode; under the automatic mode, the operation mode of the control system is automatically switched; in the semi-automatic mode, the operation mode of the control system realizes manual auxiliary automatic switching; and in the manual mode, the operation mode of the control system realizes manual switching.
12. The method for controlling the energy control system of the dc-networked ship hybrid laboratory according to claim 10, further comprising, before the step of collecting:
power-on detection, including software self-detection and hardware self-detection;
judging whether the bus voltage is established; if yes, executing the subsequent steps, otherwise, executing the step of establishing the bus voltage.
13. The method for controlling the energy control system of the dc networking ship hybrid laboratory according to claim 10, wherein the operating conditions of the pure electric mode include: the charge state of a super capacitor of the lithium battery pack is greater than a first set value, and the power of a system electric load is less than a second set value;
and/or, the operating conditions of the single diesel mode include: the state of charge of a super capacitor of the lithium battery pack is smaller than the first set value, and the power of the system electric load is smaller than the second set value;
and/or the operating conditions of the double-diesel mode comprise: the state of charge of a super capacitor of the lithium battery pack is smaller than the first set value, and the power of the system electric load is larger than the second set value;
and/or the operating conditions of the single-diesel hybrid mode comprise: the state of charge of a super capacitor of the lithium battery pack is greater than the first set value, and the power of the system electric load is less than the second set value;
and/or the operating conditions of the double-diesel hybrid mode comprise: the charge state of the super capacitor of the lithium battery pack is larger than the first set value, and the power of the system electric load is larger than the second set value.
CN202111419144.7A 2021-11-26 2021-11-26 Energy control system and method for direct-current networking ship hybrid laboratory Pending CN113937747A (en)

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Cited By (2)

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CN115241864A (en) * 2022-09-20 2022-10-25 澄瑞电力科技（上海）有限公司 Parallel self-adjustment optimization control method for new energy ship power system
WO2023093172A1 (en) * 2021-11-26 2023-06-01 中船动力研究院有限公司 Energy control system of direct current networking ship hybrid power laboratory and control method therefor

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CN109823505A (en) * 2019-03-25 2019-05-31 海通科创(深圳)有限公司 One kind being used for towed steamer hybrid power system and method
CN110001906B (en) * 2019-04-29 2023-04-25 达器船用推进器(江苏)有限公司 Ship full-electric propulsion multi-power-supply composite utilization system and power supply method
CN112173033A (en) * 2020-10-22 2021-01-05 中船动力研究院有限公司 Hybrid power system test platform for simulating ship running state and control method
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023093172A1 (en) * 2021-11-26 2023-06-01 中船动力研究院有限公司 Energy control system of direct current networking ship hybrid power laboratory and control method therefor
CN115241864A (en) * 2022-09-20 2022-10-25 澄瑞电力科技（上海）有限公司 Parallel self-adjustment optimization control method for new energy ship power system

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