CN110789700A - Ship battery power management system and control method - Google Patents

Ship battery power management system and control method Download PDF

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Publication number
CN110789700A
CN110789700A CN201910942422.3A CN201910942422A CN110789700A CN 110789700 A CN110789700 A CN 110789700A CN 201910942422 A CN201910942422 A CN 201910942422A CN 110789700 A CN110789700 A CN 110789700A
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power
ship
module
power supply
load
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CN110789700B (en
Inventor
张雷
李晞
陈理
袁瑞军
余莹屏
李亚辉
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Guangzhou Wenchong Shipyard Co Ltd
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Guangzhou Wenchong Shipyard Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
    • B63H21/17—Use of propulsion power plant or units on vessels the vessels being motor-driven by electric motor
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a ship battery power management system, which comprises: the system comprises a ship load module, a ship power supply module, a power supply control module and a power management system unit; the power input end of the ship load module is electrically connected with the ship power module through the power control module; the power supply control module controls the discharge power of the ship power supply module by receiving a control instruction to perform coordination control on the output current of the ship load module; the power management system unit is respectively connected with the ship load module, the ship power supply module and the power supply control module through communication cables; the invention also discloses a ship battery power management control method; according to the invention, the optimized output current value of the ship power module in the minimum system ineffective current heat loss value is obtained through calculation, and the ship power module is controlled to output the optimal output current value, so that the ineffective heat loss of the battery power ship system is reduced, and the efficiency of the power battery of the battery power ship in operation is improved.

Description

Ship battery power management system and control method
Technical Field
The invention relates to the technical field of ships, in particular to a ship battery power management system and a control method.
Background
In general, a battery unit of a battery-powered ship is used as a grid-connected battery unit use system. The working discharge current of the ship power battery is passively output due to the requirement of the ship load, and the current output of the storage battery unit is the passive output based on the structure of the power system and the battery parameters, so that local high current output of the system is easily generated, and ineffective heating is generated. Aiming at the high-power battery power requirement of a large freight ship in the future, the design cost of a ship storage battery unit always restricts the development, market popularization and operation efficiency of a battery power ship. In order to improve the efficiency of the power battery of the battery-powered ship in operation, reducing the ineffective heat loss of the battery-powered ship system has become a core technical point of the battery-powered ship.
Disclosure of Invention
The invention provides a ship battery power management system and a control method, which are used for obtaining an optimized output current value of a ship power module in the minimum invalid current heat loss value of the system through calculation, and controlling a power control module to control the ship power module to output the optimal output current value so as to solve the technical problem that the existing ship battery power system generates local high current output to cause invalid heating, thereby reducing the invalid heat loss of a battery power ship system as much as possible and further improving the efficiency of a power battery of a battery power ship in operation.
In order to solve the above technical problem, an embodiment of the present invention provides a ship battery power management system, including: the system comprises a ship load module, a ship power supply module, a power supply control module and a power management system unit;
the power supply input end of the ship load module is electrically connected with the ship power supply module through the power supply control module; the power supply control module controls the discharge power of the ship power supply module by receiving a control instruction so as to control the output current of the ship load module;
the power management system unit is respectively connected with the ship load module, the ship power supply module and the power supply control module through communication cables, and is used for acquiring detection data of the ship load module, the ship power supply module and the power supply control module and sending corresponding control instructions.
Preferably, the ship load module comprises a plurality of load units, and the load units are electrically connected through a series circuit.
Preferably, the power control module comprises a plurality of power control units, and the power control units are electrically connected with the power bus of the load unit.
Preferably, the ship power module includes a plurality of battery pack units, and the battery pack units are electrically connected to the power control unit in a one-to-one correspondence manner, so that the power control unit correspondingly controls the discharge power of the battery pack units.
Preferably, the battery unit includes a secondary battery.
The embodiment of the invention also provides a ship battery power management control method, which comprises the following steps:
acquiring a load position parameter and a load equipment parameter of a ship load module, and a power position parameter, a power equipment parameter and a power state parameter of a ship power supply module;
calculating to obtain an optimized output current value of the ship power supply module in the minimum system ineffective current heat loss value according to the load equipment parameters, the power supply equipment parameters and the power supply state parameters and by combining with the working requirements of the ship load module;
and controlling the ship power supply module to output the optimal output current value through a power supply control module by combining the load position parameter and the power supply position parameter.
As a preferred scheme, the calculating to obtain the optimized output current value of the ship power module in the minimum system reactive current heat loss value according to the load device parameter, the power device parameter and the power state parameter and by combining the working requirement of the ship load module includes:
calculating to obtain a total resistance value and a maximum rated working current value in the system according to the load equipment parameters and the power supply equipment parameters;
calculating to obtain the actual working current value of the system according to the power state parameters;
calculating to obtain an invalid heat loss value output by the system according to an electrical engineering heat loss formula and by combining the total resistance value, the maximum rated working current value and the actual working current value;
and calculating to obtain the optimal output current value of the ship power supply module in the minimum system ineffective current heat loss value according to the ineffective heat loss value output by the system by combining the working requirement of the ship load module.
Preferably, the power state parameters include power output voltage and current value.
Preferably, the power state parameter is obtained by setting a plurality of current nodes in the system according to a power grid bus structure to detect and obtain voltage and current values.
Preferably, the electrical engineering heat loss formula is as follows: p ═ I2R, transformed to yield:
△P＝Irated value 2*R-(IWork by/IRated value)2*R；
Wherein, IRated valueIs the maximum rated working current; i isWork byThe actual working current, R the internal resistance of the system and △ P the heat loss value of the ineffective current of the system.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the invention, the optimized output current value of the ship power module in the minimum system ineffective current heat loss value is obtained through calculation, and the power control module is controlled to control the ship power module to output the optimized output current value, so that the technical problem that the existing ship battery power system generates local high current output to cause ineffective heating is solved, the ineffective heat loss of the battery power ship system is reduced as much as possible, and the efficiency of the power battery of the battery power ship in operation is improved.
Drawings
FIG. 1: the invention discloses a structural schematic diagram of a ship battery power management system in an embodiment;
wherein the reference numbers of the drawings in the specification are as follows:
① ship load units, ② battery pack units, ③ power control units, ④ power management system units.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a preferred embodiment of the present invention provides a ship battery power management system, including: the system comprises a ship load module, a ship power supply module, a power supply control module and a power management system unit;
the power supply input end of the ship load module is electrically connected with the ship power supply module through the power supply control module; the power supply control module controls the discharge power of the ship power supply module by receiving a control instruction so as to control the output current of the ship load module;
the power management system unit is respectively connected with the ship load module, the ship power supply module and the power supply control module through communication cables, and is used for acquiring detection data of the ship load module, the ship power supply module and the power supply control module and sending corresponding control instructions.
The power management system unit is used for carrying out current control on the ship battery power management system, the ship load module, the ship power supply module and the power supply control module can be monitored in working state through cable connection, and the positions and equipment parameters of the ship load module and the ship power supply module are preset in the power management system unit. The power management system unit is based on the positions and equipment parameters of the ship load module and the power supply control module, combines the working requirement of the ship load module and the state parameter of the power supply control module, and achieves the adjustment and control of the output current of the power supply control module through the control of the power supply control module, thereby achieving the purpose of reducing the heat loss of the system ineffective current.
In another embodiment, the ship load module comprises a plurality of load units, which are electrically connected by a series circuit. In this embodiment, the power control module includes a plurality of power control units electrically connected to the power bus of the load unit. In this embodiment, the ship power module includes a plurality of battery pack units, and the battery pack units are electrically connected to the power control unit in a one-to-one correspondence manner, so that the power control unit correspondingly controls the discharge power of the battery pack units. The optimization of the working current of each power supply control unit of the power supply control module in the system is further realized, and the aim of reducing the heat loss of the invalid current of the system as much as possible is fulfilled.
It should be noted that, in any of the above embodiments, the battery unit includes a secondary battery.
The power management system unit monitors the states of all storage battery units and the ship load consumption demand on line and provides a basis for the coordinated output control of the ship storage battery units; the working output circuit of the ship storage battery units is controlled by the battery pack discharge control unit, so that all the ship storage battery units can work under a low-current working condition in a balanced manner, and a high-current working condition is avoided; and according to the arrangement of the ship storage battery pack units, working circuit parameters of the ship storage battery units are coordinated and controlled, and unnecessary energy consumption of the direct current bus caused by temperature rise due to high peak working current on the direct current bus is avoided through coordination and control of the storage battery units.
The embodiment of the invention also provides a ship battery power management control method, which comprises the following steps:
s1, acquiring the load position parameters and the load equipment parameters of the ship load module, and the power position parameters, the power equipment parameters and the power state parameters of the ship power supply module; in this embodiment, the power state parameters include power output voltage and current value. In this embodiment, the power state parameter is obtained by setting a plurality of current nodes in the system according to the power grid bus structure to detect the voltage and the current value.
S2, calculating to obtain an optimized output current value of the ship power supply module in the minimum system reactive current heat loss value according to the load equipment parameters, the power supply equipment parameters and the power supply state parameters and by combining the working requirements of the ship load module; in this embodiment, the step S2 includes: s21, calculating the total resistance value and the maximum rated working current value in the system according to the load equipment parameters and the power supply equipment parameters; s22, calculating the actual working current value of the system according to the power state parameters; s23, calculating an invalid heat loss value output by the system according to an electricity engineering heat loss formula by combining the total resistance value, the maximum rated working current value and the actual working current value; and S24, calculating the optimal output current value of the ship power supply module in the minimum system ineffective current heat loss value according to the ineffective heat loss value output by the system in combination with the working requirement of the ship load module.
And S3, combining the load position parameter and the power position parameter, and controlling the ship power module to output the optimal output current value through a power control module.
The power management system unit can monitor the working current (equivalent output power) of the ship load module, the voltage of the ship power supply module (capacity of the battery unit can be converted according to the working curve of the battery) and the power supply control module (output current) through cable connection to monitor the working state,meanwhile, a plurality of current nodes are set in the system according to a power grid bus structure, current equivalent superposition is carried out on the output current of the battery unit and the working load position and current, and the control of the output current of the battery unit is carried out based on the distance of the load position and the working current attenuation principle. And simultaneously, base time decomposition is carried out based on the equivalent operable current of the nearby battery unit in the sustainable operating time, so that the optimal operating current matching output of each operating point can be obtained. Such as: current I demand for main propulsion loadA50 power battery units are put into the power battery pack in a counting mode, power is supplied in a left-right bidirectional mode, and the battery units are evenly distributed. And according to the first control strategy, 25 unidirectional battery units are adopted, because the storage battery units are uniformly distributed, the total invalid heat loss is minimum under the load current sharing working condition, the power management system controls the power supply control module to output according to the rated current of one fiftieth of the working current instead of the near full load output of the battery pack, and the battery units which are gradually far away are put into use after the battery units are used up.
In another embodiment, the electrical engineering heat loss formula is: p ═ I2R, transformed to yield:
△P＝Irated value 2*R-(IWork by/IRated value)2*R；
Wherein, IRated valueIs the maximum rated working current; i isWork byThe actual working current, R the internal resistance of the system and △ P the heat loss value of the ineffective current of the system.
According to the calculation, the ineffective heat loss of 100% full load output and 10% current output generated by the storage battery units and the transmission cables at equal power output is up to 9 times, so that the heat loss of the storage battery pack and the cables can be reduced by 90% under the condition of reaching the required output power by coordinately reducing the output current of the storage battery units at various positions of the ship.
Based on the electrical engineering heat loss formula P-I2R, the ineffective heat loss of 100% full load output and 10% current output at the equal power output generated by the battery units and the transmission cables is up to 9 times, so that the output current of the battery units at various positions of the ship is reduced by coordination, and 90% of the heat loss of the battery pack and the cables can be reduced under the condition of reaching the required output power. By monitoring the load demand and according to the arrangement and the capacity of the ship storage battery units, the output currents of all the storage battery units are dynamically coordinated, and the invalid heat loss of the system is reduced under the condition that the load power demand of the ship is met.
The embodiment of the invention provides a dynamic power management system of a ship based on distributed storage battery unit battery power, which effectively reduces the single-point working current value of the system by performing coordinated control on the discharging working current of each ship storage battery unit, and realizes the reduction of the ineffective heat loss of a battery power system on the premise of meeting the normal work of the system. On the premise of ensuring the safe operation of the battery power freight ship, the scheme can not only meet the working safety of the ship power storage battery set, but also effectively reduce the invalid heat loss of the ship power system and further reduce the design and use cost of the battery system through reasonable and flexible current matching control.
The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, and it should be understood that the above-mentioned embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood that any modifications, equivalents, improvements and the like, which come within the spirit and principle of the invention, may occur to those skilled in the art and are intended to be included within the scope of the invention.

Claims (10)

1. A marine battery power management system, comprising: the system comprises a ship load module, a ship power supply module, a power supply control module and a power management system unit;
the power supply input end of the ship load module is electrically connected with the ship power supply module through the power supply control module; the power supply control module controls the discharge power of the ship power supply module by receiving a control instruction so as to control the output current of the ship load module;
the power management system unit is respectively connected with the ship load module, the ship power supply module and the power supply control module through communication cables, and is used for acquiring detection data of the ship load module, the ship power supply module and the power supply control module and sending corresponding control instructions.
2. The marine vessel battery power management system of claim 1, wherein the marine vessel load module comprises a plurality of load units electrically connected in series circuit.
3. The marine vessel battery power management system of claim 2, wherein the power control module comprises a plurality of power control units electrically connected to the power bus of the load unit.
4. The marine vessel battery power management system of claim 3, wherein the marine vessel power module comprises a plurality of battery pack units, and the battery pack units are electrically connected with the power control unit in a one-to-one correspondence manner, so that the power control unit correspondingly controls the discharge power of the battery pack units.
5. The marine vessel battery power management system of claim 4, wherein the battery unit comprises a battery.
6. A control method of a marine vessel battery power management system according to any one of claims 1 to 5, comprising:
acquiring a load position parameter and a load equipment parameter of a ship load module, and a power position parameter, a power equipment parameter and a power state parameter of a ship power supply module;
calculating to obtain an optimized output current value of the ship power supply module in the minimum system ineffective current heat loss value according to the load equipment parameters, the power supply equipment parameters and the power supply state parameters and by combining with the working requirements of the ship load module;
and controlling the ship power supply module to output the optimal output current value through a power supply control module by combining the load position parameter and the power supply position parameter.
7. The method for managing and controlling power of battery power of marine vessel according to claim 6, wherein said calculating an optimized output current value of the marine vessel power module in the minimum system reactive current heat loss value according to the load device parameter, the power device parameter and the power state parameter in combination with the operating requirement of the marine vessel load module comprises:
calculating to obtain a total resistance value and a maximum rated working current value in the system according to the load equipment parameters and the power supply equipment parameters;
calculating to obtain the actual working current value of the system according to the power state parameters;
calculating to obtain an invalid heat loss value output by the system according to an electrical engineering heat loss formula and by combining the total resistance value, the maximum rated working current value and the actual working current value;
and calculating to obtain the optimal output current value of the ship power supply module in the minimum system ineffective current heat loss value according to the ineffective heat loss value output by the system by combining the working requirement of the ship load module.
8. The marine vessel battery power management control method of claim 7, wherein the power state parameters include power output voltage, current value.
9. The method according to claim 7, wherein the power state parameter is obtained by setting a plurality of current nodes in the system according to the bus structure of the power grid to detect the voltage and current values.
10. Such asThe marine vessel battery power management control method of claim 7, wherein the electrical engineering heat loss formula is: p ═ I2R, transformed to yield:
△P＝Irated value 2*R-(IWork by/IRated value)2*R；
Wherein, IRated valueIs the maximum rated working current; i isWork byThe actual working current, R the internal resistance of the system and △ P the heat loss value of the ineffective current of the system.
CN201910942422.3A 2019-09-30 2019-09-30 Control method of ship battery power management system Active CN110789700B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205355850U (en) * 2015-12-25 2016-06-29 宁波市北仑海伯精密机械制造有限公司 Electric ship control system
CN107697258A (en) * 2017-09-26 2018-02-16 广船国际有限公司 A kind of Ship Electrical Power System and its control method
CN207595233U (en) * 2017-09-26 2018-07-10 广船国际有限公司 A kind of Ship Electrical Power System
CN109591992A (en) * 2018-12-28 2019-04-09 东莞亿动智能科技有限公司 Marine electric propeller control system and method, electric plating propulsion and electric ship
CN209080134U (en) * 2018-09-21 2019-07-09 浙江云迪电气科技有限公司 A kind of electric ship control system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205355850U (en) * 2015-12-25 2016-06-29 宁波市北仑海伯精密机械制造有限公司 Electric ship control system
CN107697258A (en) * 2017-09-26 2018-02-16 广船国际有限公司 A kind of Ship Electrical Power System and its control method
CN207595233U (en) * 2017-09-26 2018-07-10 广船国际有限公司 A kind of Ship Electrical Power System
CN209080134U (en) * 2018-09-21 2019-07-09 浙江云迪电气科技有限公司 A kind of electric ship control system
CN109591992A (en) * 2018-12-28 2019-04-09 东莞亿动智能科技有限公司 Marine electric propeller control system and method, electric plating propulsion and electric ship

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