CN108116646B - Ship electric propulsion system - Google Patents
Ship electric propulsion system Download PDFInfo
- Publication number
- CN108116646B CN108116646B CN201711483321.1A CN201711483321A CN108116646B CN 108116646 B CN108116646 B CN 108116646B CN 201711483321 A CN201711483321 A CN 201711483321A CN 108116646 B CN108116646 B CN 108116646B
- Authority
- CN
- China
- Prior art keywords
- power
- inverters
- eedi
- main control
- control unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/21—Control means for engine or transmission, specially adapted for use on marine vessels
-
- 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
- B63H21/21—Control means for engine or transmission, specially adapted for use on marine vessels
- B63H2021/216—Control means for engine or transmission, specially adapted for use on marine vessels using electric control means
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a ship electric propulsion system, which comprises a main control unit, a motor driving device consisting of two inverters, a propeller consisting of a double-winding integrated motor, a direct current power grid consisting of a plurality of variable-speed rectifier generators, an EEDI data intelligent calculation and wireless transmission module arranged on the main control unit, and an EEDI data receiving server connected with the EEDI data intelligent calculation and wireless transmission module through wireless communication; the system has the functions of automatically monitoring the energy consumption of the whole ship and calculating the energy consumption value, and provides a remote real-time data acquisition interface of the real ship for research on reducing EEDI energy efficiency indexes and implementation of control policies proposed by IMO organizations.
Description
Technical Field
The invention belongs to the technical field of industrial control, and particularly relates to an electric propulsion system for improving the energy efficiency of a ship.
Background
Most of the existing ship electric propulsion systems are provided with two or more propulsion branches, and each branch is provided with a frequency converter and a propulsion motor, but under the new trend of new concepts of green ships, the ship energy efficiency of the existing ship electric propulsion systems needs to be improved urgently.
In order to meet the design requirement of decreasing the design index of ship efficiency (EEDI) proposed by IMO, and for the purposes of improved ship energy efficiency, convenience of maintenance and operation, and higher power density of propulsion equipment, it is necessary to invent an electric propulsion system capable of improving ship energy efficiency.
Disclosure of Invention
The invention aims to provide an electric propulsion system capable of improving the energy efficiency of a ship in order to overcome the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a ship electric propulsion system comprises a main control unit, a motor driving device consisting of two inverters, a propeller consisting of a duplex winding integrated motor, a direct current power grid consisting of a plurality of variable speed rectifier generators, an EEDI data intelligent calculation and wireless transmission module arranged on the main control unit, and an EEDI data receiving server connected with the EEDI data intelligent calculation and wireless transmission module through wireless communication, wherein the main control unit is connected with a control panel through a hard wire, and the main control unit is connected with the inverters, and the inverters, the rectifier generators and the direct current power grid are connected through hard wires; the two inverters are connected by a twisted pair shielding hard wire.
According to the ship electric propulsion system, the stator of the double-winding integrated motor is integrated in the pipe tunnel, and the propeller blades are fixed inside the motor rotor.
The control panel of the ship electric propulsion system selects a single inverter or two inverters to act through the mode switching button.
According to the ship electric propulsion system, the control units of the two inverters are connected through the twisted-pair shielded wire, and the analog electric signal is used as a power balancing signal, so that the purpose of balancing the output power of the two inverters is achieved.
The ship electric propulsion system has no electrical association between two groups of windings of the double-winding integrated motor, can be regarded as two independent propulsion branches, and can operate independently.
Another object of the present invention is to provide a method for controlling a ship electric propulsion system, comprising the steps of:
a) the main control unit detects the load rate in the direct current power grid after the system is started, and if the load rate is lower than 50%, each rectifier generator selects the rotating speed running under corresponding power according to the inherent fuel consumption characteristic curve of each rectifier generator so as to share different powers;
b) (ii) a If the load factor exceeds 50%, adjusting and balancing the power of each rectification generator according to the analog quantity signal output by the power distribution line between the two inverters to enable the power to be equal;
c) if the load rate is 95%, the output signal of the inverter automatically reduces the power of the rectifier generator;
d) if a certain rectifier generator running on the grid in the direct current power grid suddenly breaks down or trips, the main control unit outputs a rapid load reduction instruction to the inverter instantly, the propulsion power output by the rectifier generator is reduced to a small value at the moment to ensure that the direct current power grid is not overloaded, and after a period of time delay, the power output climbs to a power value lower than a dynamic power limit value according to the preset slope time.
The invention has the beneficial effects that: the system intelligently produces real-time ship energy efficiency indexes (EEDI), and sends the EEDI to a remote server through a wireless network to be used as monitoring records, and real ship data research data can be used as support for feedback of theoretical research and design. The ship direct current power grid configuration means that a main Alternating Current (AC) distribution board, a distributed rectifier and a converter transformer are not required to be installed, total loss is lower, harmonic distortion is less, the system combination is more flexible, and available space and cargo quality are increased. The variable-speed rectifier unit enables the diesel engine to work at the optimal energy consumption point through calculation of the unit controller, saves energy and reduces emission. Because the propulsion system uses the double-winding integrated motor, a propulsion shaft and a gear box are omitted, the mechanical noise is greatly reduced, the living comfort of ship constructors is improved, and the power density of the propulsion device is greatly improved. The double inversion of the propulsion system and the design of the double windings ensure that the other inverter is put into use after one inverter fails, and the double winding propeller only has the arrangement requirement of one propeller, so that the cabin space utilization rate, the cargo carrying capacity and the passenger carrying capacity are increased.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a flow chart of the power control system for the optimal energy consumption point of the system unit according to the present invention.
The figures are numbered: the system comprises a main control unit 1, an inverter 2, a double-winding integrated motor 3, a control panel 4, a rectifier generator 6, a direct current power grid 7, an EEDI data intelligent calculation and wireless transmission module 8 and an EEDI data receiving server 9.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Referring to fig. 1, the invention discloses a ship electric propulsion system, which comprises a main control unit 1, a motor driving device composed of two inverters 2, a propeller composed of a double-winding integrated motor 3, a direct current power grid 7 composed of a plurality of variable-speed rectifier generators 6, an intelligent EEDI data calculation and wireless transmission module 8 arranged on the main control unit 1, and an EEDI data receiving server 9 connected with the intelligent EEDI data calculation and wireless transmission module 8 through wireless communication, wherein the main control unit 1 is connected with a control panel 4 through a hard wire, the main control unit 1 is connected with an instruction of the control panel 4 and sends a control signal to the inverters 2 after processing, and the main control unit 1 and the inverters 2, the rectifier generators 6 and the direct current power grid 7 are all connected through hard wires; the two inverters 2 are connected by a twisted pair shielding hard wire.
A boats and ships electric propulsion system, its bifilar integrated motor 3's stator is integrated in the pipe tunnel, the screw paddle then is fixed inside motor rotor, does not contain transmission shaft or change gear case, simultaneously, the vacuole effect has been reduced as far as possible in the design, paddle and slide bearing are removable, wearing and tearing part can also be changed very easily under water, the maintainability is fabulous. The mechanical wear of the single branch is greatly reduced compared with the traditional double-branch propelling machinery, and compared with the traditional electric propelling system, the single-branch propelling machinery saves a motor shaft, and the single-branch propelling machinery and the traditional double-branch propelling machinery can save energy to a great extent under the combined action of the motor shaft and the traditional electric propelling system.
The control panel 4 is provided with a mode switching button, and can be switched to one of modes of single-action 1, single-action 2 and combined operation and energy efficiency control modes; the control units of the two inverters 2 are connected by twisted pair shielded wires, and analog quantity electric signals are used as power balance signals, so that the purpose of balancing the output power of the two inverters is achieved; two groups of windings of the double-winding integrated motor 3 have no electrical association, can be regarded as two independent propulsion branches and can independently operate.
The propulsion system can improve the automation degree of equipment, improve the safety degree of ships, save the ship arrangement space, realize the redundancy of power devices, improve the utilization of natural energy, reduce energy consumption and environmental pollution, improve the energy efficiency of the ships and load the design specification requirement of IMO (inertial measurement of integration) for gradually reducing the EEDI index. The high silence performance brings more comfortable living space, the convenient advantage of tearing open and changing of propeller.
The rectifying generator 6 of the invention adopts a fuzzy controller based on genetic algorithm, obtains the lowest energy consumption point of the power-rotating speed of the unit through self-learning, fits a curve, and can automatically adjust the energy consumption of a power generation system and a power system according to the working condition, so that the system power generation system, a propulsion system and an auxiliary system work under the working condition with the minimum energy consumption and the minimum emission. The system of the invention allows the operating speed of the rectified generator 6 to be variable, thus enabling optimal specific fuel consumption to be achieved. The energy management system PMS of the ship adopts a unit power equalization mode or a fuel consumption rate priority mode, which is specifically shown in fig. 2.
The system mainly comprises the functions of intelligent real-time calculation of ship energy efficiency indexes (EEDI) and remote monitoring of related data, a Power Management System (PMS) based on that a unit adjusts the self rotating speed according to the load working condition to achieve the self optimal energy consumption point, a switching propulsion single-action/linkage mode, two inverters in a linkage mode to output propulsion power to double windings in parallel, and the inverter output power distribution.
1 standardized control interface
The design interface can adopt standardized input and output interfaces, including input and output of DC 24V digital quantity, input and output of 4-20mA analog quantity and a standard field bus interface, and can be realized on different controllers.
Introduction to control function
1) Propulsion control mode switching
The propulsion system can be set to a single-action 1 mode, a single-action 2 mode, a combined operation mode and an energy efficiency control mode.
In the single-acting 1 mode or the single-acting 2 mode, only one group of windings of the integrated motor propeller are put into operation, at the moment, the inverter 1 or the inverter 2 operates according to the selected operation mode, and at the moment, the single inverter provides the driving force of the propulsion motor.
Under the combined operation mode, the two inverters are operated, the two groups of windings of the integrated motor propeller are also operated, and at the moment, the power is balanced between the two inverters through analog quantity signals output by the power distribution line, so that the power on two sides is equal, and the output power is optimized.
And under the energy efficiency control mode, the frequency converter operates at a power point which ensures that the energy consumption rates of the unit and the auxiliary machine are the lowest.
2) Introduction to Power management System
The power station system is a direct-current power grid consisting of variable-speed rectifying generator sets, and the number of the generator sets can be randomly input or disconnected according to power requirements. The generator set adjusts the rotating speed according to the actual power, and meanwhile, the power management system can compare the real-time on-line power and the available power and judge whether the propulsion power needs to be limited. If the real-time power exceeds 95% of the available power, the power is dynamically limited.
3) Power management system control function
The control functions include the following:
firstly, after a system is started, whether the load rate of a power grid in the power grid exceeds 50% is detected, if the load rate of the power grid in the power grid is lower than 50%, each unit selects a rotating speed running under corresponding power according to an inherent fuel consumption characteristic curve, and at the moment, the power shared by each unit is unequal. At the moment, the power station is in a fuel consumption rate priority mode, and the fuel consumption rates of all the units are the lowest.
And secondly, detecting that the load rate of the power grid in the power grid exceeds 50%, adjusting and balancing the power of each unit according to a signal output by a power distribution line, so that the power of each unit is equal, and the power station is in a unit power balancing mode at the moment. The rotation speeds of the units may be different, but are in a rotation speed output state with lower fuel consumption according to the fuel consumption characteristic curve.
Third, if the total real-time power in the grid exceeds 95% of the total available power, the PMS system will output a dynamic limit power signal and the inverter will automatically reduce the power based on the output signal.
Fourthly, if a certain unit running on the power grid suddenly breaks down or a unit switch suddenly trips, the PMS can instantly and quickly output a quick load reduction instruction to the inverter, the output propulsion power can be reduced to a small value at the moment, the power grid is ensured not to be overloaded, and after a period of time delay, the output power value climbs to a power value lower than a dynamic power limit value according to the preset slope time.
Fifthly, if the load of the manual input power grid is large, in order to ensure that the power grid power station is not overloaded, a heavy load inquiry function is set, and if the available power calculated by the system is sufficient, a heavy load operation permission instruction is sent out to start the input load.
The direct current power grid configuration of the ship also means that heavy alternating current distribution and propulsion transformers are not needed any more, fewer power devices and cables are needed, the space and the load capacity of the ship can be increased, the device arrangement is more flexible, the engine efficiency is higher, the maintenance requirement is reduced, the dynamic response and the maneuverability are improved, the energy consumption and the pollution emission can be reduced, the energy efficiency of the ship is improved, and the design specification requirement for gradually reducing the EEDI index is newly proposed by load IMO. The system is more flexible in combination, and the available space and the quality of goods are increased. Because the double-winding integrated motor is used, a propulsion shaft and a gear box are omitted, mechanical noise is greatly reduced, double inversion and double-winding redundancy design are adopted, so that after one inverter breaks down, the other inverter can be ensured to be put into use, the double-winding propeller reduces the arrangement requirement of one propeller, and the space utilization rate, cargo carrying capacity and passenger carrying capacity can be increased.
The above-described embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be applied, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the inventive concept of the present invention, and these embodiments are within the scope of the present invention.
Claims (2)
1. A marine vessel electric propulsion system, characterized by: the device comprises a main control unit (1), a motor driving device consisting of two inverters (2), a propeller consisting of a double-winding integrated motor (3) and a direct current power grid (7) consisting of a plurality of variable-speed rectifier generators (6), wherein the control units of the two inverters (2) are connected by twisted-pair shielded wires, an analog quantity signal is used as a power balance signal to achieve the aim of balancing the output power of the two inverters, stators of the double-winding integrated motor (3) are integrated in a pipe tunnel, propeller blades are fixed in a motor rotor, two groups of windings of the double-winding integrated motor (3) independently operate, the device also comprises an EEDI data intelligent calculation and wireless transmission module (8) arranged on the main control unit (1) and an EEDI data receiving server (9) connected with the EEDI data intelligent calculation and wireless transmission module (8) through wireless communication, the control system is characterized in that the main control unit (1) is connected with a control panel (4) through a hard wire, the control panel (4) selects a single inverter (2) to act or two inverters (2) through a mode switching button, and the main control unit (1) is connected with the inverters (2) through the hard wire, and the inverters (2), the rectifying generator (6) and the direct current power grid (7) through the hard wire; the two inverters (2) are connected by adopting a twisted pair shielding hard wire.
2. A method of controlling an electric propulsion system for a marine vessel according to claim 1, comprising the steps of: a) the main control unit (1) detects the load rate in the direct current power grid (7) after the system is started, and if the load rate is lower than 50%, each rectifier generator (6) selects the rotating speed running under corresponding power according to the inherent fuel consumption characteristic curve of the rectifier generator to share different powers;
b) (ii) a If the load factor exceeds 50%, adjusting and balancing the power of each rectifier generator (6) to be equal according to the analog quantity signal output by the power distribution line between the two inverters (2);
c) if the load factor reaches 95%, the output signal of the inverter (2) automatically reduces the power of the rectifier generator (6); d) if a certain rectification generator (6) running on the grid in the direct current power grid (7) suddenly breaks down or trips, the main control unit (1) outputs a rapid load reduction instruction to the inverter (2) instantly, the propulsion power output by the rectification generator (6) is reduced to a small value at the moment to ensure that the direct current power grid (7) is not overloaded, and after a period of time delay, the output power climbs to a power value lower than a dynamic power limit value according to preset ramp time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711483321.1A CN108116646B (en) | 2017-12-29 | 2017-12-29 | Ship electric propulsion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711483321.1A CN108116646B (en) | 2017-12-29 | 2017-12-29 | Ship electric propulsion system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108116646A CN108116646A (en) | 2018-06-05 |
| CN108116646B true CN108116646B (en) | 2020-04-24 |
Family
ID=62232506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711483321.1A Active CN108116646B (en) | 2017-12-29 | 2017-12-29 | Ship electric propulsion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108116646B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110893900B (en) * | 2018-09-13 | 2021-06-25 | 中国船舶重工集团公司第七一一研究所 | Ship electric propulsion system and ship |
| CN109656219B (en) * | 2019-01-01 | 2021-04-06 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Distributed ship propulsion centralized control device |
| CN109799705B (en) * | 2019-01-01 | 2022-01-14 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Thrust distribution method for reducing wear of dynamic positioning ship propeller |
| US10654551B1 (en) * | 2019-02-13 | 2020-05-19 | GM Global Technology Operations LLC | Method of overshoot for faster planing of marine vessel |
| KR102247165B1 (en) * | 2020-02-28 | 2021-04-30 | 한국해양대학교 산학협력단 | Machine learning based ship energy-power management system |
| CN113572147B (en) * | 2021-07-22 | 2024-03-19 | 中国船舶集团有限公司第七一一研究所 | DC power supply and distribution system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226706B (en) * | 2015-09-28 | 2018-03-27 | 中国船舶重工集团公司第七一二研究所 | A kind of propeller power dynamic self-adapting control method |
| CN105790672A (en) * | 2016-04-05 | 2016-07-20 | 中国船舶重工集团公司第七〇二研究所 | Frequency converter test system |
| CN106494599A (en) * | 2016-10-30 | 2017-03-15 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七二研究所） | A kind of light-seine fishery fishing boat electric propulsion system |
| CN107416165A (en) * | 2017-03-23 | 2017-12-01 | 山西汾西重工有限责任公司 | The fault traversing system and its traversing method of ship direct current networking electric propulsion system |
| CN106985992A (en) * | 2017-03-23 | 2017-07-28 | 山西汾西重工有限责任公司 | Ship direct current networking electric propulsion system and regulation and control method with pulse load |
-
2017
- 2017-12-29 CN CN201711483321.1A patent/CN108116646B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108116646A (en) | 2018-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108116646B (en) | Ship electric propulsion system | |
| EP3405388B1 (en) | Vessel energy management system | |
| US8926381B2 (en) | Hybrid propulsion system for a vessel | |
| CN107697256A (en) | A kind of power integration system of pure electric ship | |
| EP3016227B1 (en) | Electric power generating system | |
| CN102530219B (en) | Electric propulsion system | |
| CN104037927A (en) | Marine electric power system capable of supplying power by novel hybrid power source | |
| CN206218184U (en) | Ship direct current networking electric propulsion system | |
| CN105826948A (en) | Electric propulsion ship alternating-current power supply system | |
| CN207683754U (en) | A kind of power integration system of pure electric vehicle ship | |
| CN106160010A (en) | Electrical Propulsion Ship integrated power system | |
| CN111409807A (en) | Diesel-electric hybrid electric propulsion system for ship alternating current-direct current networking | |
| CN101219644A (en) | Watercraft electric propulsion system based on super capacitance hybrid power | |
| CN205945056U (en) | Unmanned aerial vehicle's power supply system and unmanned aerial vehicle | |
| CN203840051U (en) | Ship electric power system supplied by mixed power supply of storage battery group and generator | |
| CN103457259A (en) | Medium-voltage direct zone distribution system | |
| CN205753444U (en) | Electrical Propulsion Ship ac power supply system | |
| CN203707801U (en) | Energy-saving high-power positioning capability ship hybrid electric propulsion system | |
| CN206255178U (en) | Multi-functional ship direct current networking electric propulsion system | |
| KR20130012750A (en) | Power generation system for ships | |
| CN206255175U (en) | Ship direct current networking propulsion system with batteries to store energy | |
| CN216508978U (en) | Unmanned ship direct current network deployment electric propulsion system | |
| RU2498926C1 (en) | High tonnage ship electric plant | |
| JP6298967B2 (en) | Frequency converter for electric propulsion ship and electric propulsion ship | |
| Shakil et al. | Low voltage onboard DC micro-grid for electric ship: A detailed simulation with design configuration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |