EP1395487A1 - Marine propulsion system with reduced on-board network distortion factor - Google Patents
Marine propulsion system with reduced on-board network distortion factorInfo
- Publication number
- EP1395487A1 EP1395487A1 EP02745129A EP02745129A EP1395487A1 EP 1395487 A1 EP1395487 A1 EP 1395487A1 EP 02745129 A EP02745129 A EP 02745129A EP 02745129 A EP02745129 A EP 02745129A EP 1395487 A1 EP1395487 A1 EP 1395487A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intermediate circuit
- converter
- electrical system
- converters
- ship
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/08—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in parallel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/22—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing
- B63H23/24—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing electric
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/443—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/45—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
Definitions
- Harmonics occur in the vehicle electrical system when there is a non-sinusoidal current draw, for example when strong non-linear consumers are connected to the vehicle electrical system.
- the vehicle electrical system must not contain any major harmonic components even if the electrical ship propulsion system is fed from the vehicle electrical system.
- the electric ship propulsion system comprises one or more converters connected to the on-board electrical system, each of which supplies one or more electric propeller motors with current.
- the on-board electrical system is usually a 3-phase medium-voltage network, in rare cases also a low-voltage network. From this, the converter including the
- Converter transformer for the drive motor a three-phase voltage system with variable voltage and frequency.
- the voltage at the output of the converter depends on the frequency.
- the converter can be an intermediate circuit converter with a direct voltage intermediate circuit and a multi-phase control th bridge in the exit.
- a pulsating load is created on the capacitor, which has an effect on the vehicle electrical system.
- Known measures include the use of a three-phase transformer, whose primary windings are connected in a triangle.
- the three-phase transformer has two sets of secondary windings, one connected in a star and the other in a delta. These two sets of secondary windings are each connected to their own bridge rectifiers, which feed a common DC link capacitor on the output side.
- Three-phase bridges made of IGBT x s are connected to the intermediate circuit capacitor for each phase of the output network of the converter.
- the IGBTs are controlled in such a way that there is an approximately sinusoidal current profile in the stator winding of the connected propeller motor.
- Such a converter is referred to as a twelve-pulse converter, in which only the characteristic harmonics of the orders are left on the network side
- the motors are subjected to different powers. Due to the different load on the motors and the corresponding system feedback, the distortion factor to be measured in the vehicle electrical system is reduced by up to a third. This reduction is particularly noticeable in the higher harmonics, which do not cancel each other out due to the special wiring of the converters.
- the theory for the improvement of the distortion factor is that a change in the current flow angle at the intermediate circuit capacitor is responsible for the reduction. With a lower load on the intermediate circuit capacitor in the converter, charging currents occur with different phase angles compared to a greater current draw from the intermediate circuit capacitor. This change in the phase angle may have repercussions on the three-phase bridge on the output side and the current profile in the connected motor.
- the regulation of the drive motors of the ship can be carried out in such a way that the load distribution to the motors occurs in every operating situation in the sense of minimizing the harmonics of the order 23, 25, 47, 49.
- the method according to the invention can be used in particular on ships which have engines at the bow and stern, so that the different output does not lead to a course change which has to be compensated for by a rudder deflection.
- An improvement in the harmonic content can also be achieved in ships with two propeller motors at the stern, which are operated with the same power.
- the DC link capacitors in the inverters for the propeller motors differ. Due to the different capacitance values of the DC link capacitors in the two converters, the higher harmonics that occur in a 24-pulse converter can be compensated in a similar way.
- each of the converters is designed as a 24-pulse converter, so that the lower harmonics cancel each other out as described at the beginning.
- 1 shows the basic circuit diagram for the electric drive of a ship, which has two propeller motors at each end, 2 shows a table to illustrate the harmonic distortion behavior as a function of the load distribution on the propeller motors,
- FIG. 3 shows the basic circuit diagram for the electrical drive of a ship with two propeller motors
- FIG. 4 shows the basic circuit diagram of a converter.
- FIG. 1 shows the basic circuit diagram for a ship propulsion system with electric motors.
- the drive system includes a total of five schematically indicated diesel engines 1, 2, 3, 4 and 5.
- a three-phase synchronous generator 6, 7, 8, 9, 11 is mechanically coupled to each of the diesel engines 1 ... 5.
- the synchronous generators 6, 7, 8, 9, 11 are combined into groups, the synchronous generators 6 and 7 working on a first busbar 12 and the synchronous generators 8, 9, 11 working on a second busbar 13.
- the two busbars are electrically coupled to one another in normal operation.
- the two busbars 12, 13 symbolize a medium-voltage network with 50 Hz and 6.6 kV.
- a three-phase transformer 14, 15 is connected to each of the two busbars 12, 13 and feeds the low-voltage electrical system 16, 17 on the output side.
- the transformers are connected in a triangle on the input side and in a star on the output side.
- the power supply for the travel drive follows from the two busbars 12, 13.
- two converters 18 and 19 are connected to the busbar 12 and two converters 21 and 22 are connected to the busbar 13.
- Each of the converters 18..22 feeds an associated three-phase asynchronous motor 23 ... 27.
- Each of the asynchronous motors 23..27 drives an associated ship propeller via a ship shaft 28..32
- the two ship propellers 33, 35 are one Ship propellers 34 and 36 are provided at the other end of the ship. Such a distribution of the ship's propellers is used, for example, in double-ended ferries to save turning maneuvers.
- the propeller motors 23 and 26, which are assigned to one end of the ship, are connected to different busbars. This ensures that if a busbar 12 or 13 fails, at least one propeller motor is available to the drive at each end of the ship.
- the converters 18..22 are identical to one another. These are 12-pulse converters with a DC link. Since the converters 18..22 are identical to one another, it is sufficient to describe the structure of only one of the converters 18..22 in more detail.
- the converter 18 On the input side, the converter 18 has a three-phase transformer 37 with a primary winding group 38 connected in a triangle, which is connected to the busbar 12.
- the three-phase transformer 37 also includes two groups of secondary windings 39 and 41 which are magnetically coupled to the primary windings 38.
- the group of secondary windings 39 is in a triangle and the group of secondary windings 41 is connected in a star, so that one
- Phase rotation between the output voltages is obtained.
- Each of the two groups 41 and 39 of secondary windings is connected to an associated three-phase bridge rectifier 42 and 43.
- the bridge rectifiers 42, 43 are simply uncontrolled diode bridge rectifiers.
- Both bridge rectifiers 42, 43 charge a common intermediate circuit capacitor 44, which consists of the parallel connection of several individual capacitors.
- the capacitance of the DC link capacitor is approx. 56 F per motor.
- From the intermediate circuit capacitor 44 is fed a controlled three-phase bridge 45 made of IGBT, the output side of the Generate three-phase supply voltage for the asynchronous motor 23.
- Additional windings on the three-phase transformer 37 ensure that the phase position on the two groups 41 and 39 of secondary windings is additionally rotated by plus 7.5 °.
- the converter 19 connected to the same busbar 12 has the same construction as explained above, with the restriction that the additional circuitry results in a phase shift of minus 7.5 °.
- both frequency converters have a phase shift of 15 ° relative to one another, so that from the perspective of busbar 12 they work like a 24-pulse converter.
- the distortion factor values listed in the table in FIG. 2 can be achieved with the circuit arrangement shown. If three generators are in operation and all motors are operated with the same output, a harmonic distortion of 3.09% must be measured on the busbars 12, 13.
- the propeller flow has a distortion factor of 7.54%. However, if the mo- gates are operated asymmetrically, ie the power per busbar 12 or 13 is divided in a ratio of 1: 0.6, the total drive power being the same as before, the distortion factor suddenly drops in the voltage curve on the busbars 12 and 13 to 1.9 %.
- the propeller motor 24 consumes, for example, 0.6 times the power of the power of the propeller motor 23; the same relationship applies to the propeller motors 26 and 27.
- the distortion factor in the current to the single motor is practically independent of the load distribution.
- the distortion factor for the current, as it is emitted by each of the individual generators, is practically independent of the load and the operating station on the busbars 12, 13.
- the reduction in the distortion factor in the voltage profile on the busbars 12, 13 arises from a compensating effect between a converter that is more heavily loaded and a converter that is less heavily loaded.
- the distortion factor in the output signal of each converter is practically independent of the load distribution. It is assumed that the change in the current flow angle associated with the change in load is responsible for the compensation effect during the periodic recharging of the intermediate circuit capacitor.
- each of the converters 18, 21 is designed to be 24-pulse per se.
- a 24-pulse converter can be obtained, for example, by charging the intermediate circuit capacitor 44 via two magnetically uncoupled transformers, the transformers being rotated on the primary side by 15 ° in phase relationship.
- the basic circuit diagram for such a converter is illustrated in FIG. 4.
- the converter 18 according to FIG. 4 has two input transformers 46 and 47.
- Each of the input transformers 46, 47 has a group of primary windings 48 and 49 which, as already mentioned, are electrically rotated by 15 ° relative to one another.
- Each of the two transformers 46, 47 is further provided with two groups of secondary windings 51, 52, 53 and 54, which are connected in a delta or star and connected to an associated bridge rectifier 55, 56, 57 and 58.
- the bridge rectifiers 55 ... 58 charge an intermediate circuit capacitor 59, from which three groups of bridges 61, 62 and 63 are fed, which contain IGBTs in their bridge branches. By driving the IGB ⁇ s in known Way, the desired three-phase alternating current is generated at the output.
- the two converters 18 and 21 are designed in accordance with FIG. 4 and, as already stated, differ in the size of the intermediate circuit capacitor 59. Since each converter in the exemplary embodiment in accordance with FIG. 4 operates with 24 pulses, no harmonics occur below the 23rd harmonic. Only the harmonics 23, 25 and 47, 49 remain. Compensation occurs here in that with the same power, i.e. symmetrical distribution of the drive power to the two remaining propeller motors 23 and 26, the capacitances of the two intermediate circuit capacitors 54 in the two power converters 18, 21 differ in a similar manner as the power distribution among the propeller motors which in the embodiment according to FIG Distortion factor.
- a reduction in the distortion factor in the medium-voltage network is achieved by connecting two converters or groups of converters in such a way that they behave like 24-pulse converters from the point of view of the network.
- the converters or groups of converters obtained in this way are loaded differently, or are dimensioned differently in their DC voltage intermediate circuit.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Control Of Multiple Motors (AREA)
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10128152 | 2001-06-11 | ||
DE2001128152 DE10128152B4 (en) | 2001-06-11 | 2001-06-11 | Ship propulsion system with reduced on-board distortion |
PCT/DE2002/002100 WO2002100716A1 (en) | 2001-06-11 | 2002-06-07 | Marine propulsion system with reduced on-board network distortion factor |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1395487A1 true EP1395487A1 (en) | 2004-03-10 |
Family
ID=7687828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02745129A Withdrawn EP1395487A1 (en) | 2001-06-11 | 2002-06-07 | Marine propulsion system with reduced on-board network distortion factor |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1395487A1 (en) |
CN (1) | CN1514791A (en) |
DE (1) | DE10128152B4 (en) |
WO (1) | WO2002100716A1 (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1638199A4 (en) | 2003-06-26 | 2011-07-06 | Toshiba Mitsubishi Elec Inc | Motor drive system |
EP1641098B1 (en) * | 2003-06-26 | 2020-05-13 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Motor drive system |
JP4489018B2 (en) * | 2003-06-26 | 2010-06-23 | 東芝三菱電機産業システム株式会社 | AC motor drive system |
JPWO2005031939A1 (en) * | 2003-09-26 | 2006-12-07 | 東芝三菱電機産業システム株式会社 | Electric motor drive system |
DE102004034936A1 (en) * | 2004-07-09 | 2006-02-02 | Alstom Power Conversion Gmbh | Electric power system and operating method therefor |
DE102005004985A1 (en) * | 2005-02-02 | 2006-08-03 | Wünsche, Thomas, Dr.-Ing. | Drive system for sport boats and cruiser has small energy producers, with maximum power per energy producer below maximum needed propulsion output, are applied for production of propulsion output |
DE102005025428B4 (en) * | 2005-06-02 | 2007-08-09 | Siemens Ag | Drinking water production and supply ship |
DE102008022077A1 (en) * | 2008-05-05 | 2009-11-12 | Siemens Aktiengesellschaft | Circuit for feeding a drive machine with several winding systems |
FR2938234B1 (en) | 2008-11-13 | 2010-11-26 | Stx France Cruise Sa | AUTOMOTIVE SHIP AFFECTED TO NAVIGATION ON A SET DISTANCE BETWEEN A STARTING POINT AND A POINT OF ARRIVAL |
EP2226928A1 (en) * | 2009-03-03 | 2010-09-08 | Bluewater Energy Services B.V. | Semi-direct variable speed drive with N+1 power availability |
DK2312744T3 (en) * | 2009-10-13 | 2012-10-01 | Converteam Technology Ltd | Power Distribution Systems |
US8315071B2 (en) | 2009-11-03 | 2012-11-20 | Honeywell International Inc. | Composite 24-pulse AC to DC power converter having a main rectifier and multiple auxiliary rectifiers |
RU2479103C1 (en) * | 2011-10-25 | 2013-04-10 | Российская Федерация, От Имени Которой Выступает Министерство Промышленности И Торговли Российской Федерации | Electric propulsion installation with closing device |
CN103457246B (en) * | 2013-09-10 | 2016-04-20 | 中国人民解放军海军工程大学 | The DC-zonal electric distribution network protection method of middle pressure direct current supply |
CN104477361A (en) * | 2014-12-10 | 2015-04-01 | 重庆长航东风船舶工业公司 | Boat pushing system, power consumption system and control method |
RU2709983C2 (en) * | 2018-03-07 | 2019-12-23 | федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный морской технический университет" (СПбГМТУ) | Ship electric power plant |
RU2690628C1 (en) * | 2018-03-12 | 2019-06-04 | Василий Андреевич Егоров | Shipboard electromechanical control system |
RU2683042C1 (en) * | 2018-06-25 | 2019-03-26 | федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный морской технический университет" (СПбГМТУ) | Ship electric power installation |
RU2692980C1 (en) * | 2018-08-15 | 2019-06-28 | федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный морской технический университет" (СПбГМТУ) | Ship electric power plant |
RU2713488C1 (en) * | 2019-02-01 | 2020-02-05 | Федеральное государственное унитарное предприятие "Крыловский государственный научный центр" | Propellant electrical installation |
RU2716891C1 (en) * | 2019-09-16 | 2020-03-17 | федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный морской технический университет" (СПбГМТУ) | Ship electric power plant |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE900788C (en) * | 1944-06-15 | 1954-01-04 | Pleuger K G | Propulsion device for ships |
FR969841A (en) * | 1948-08-03 | 1950-12-26 | Chantiers Navals Franco Belges | Order for double-sided bins |
FR2126568A5 (en) * | 1971-02-11 | 1972-10-06 | Mte | |
ZA74908B (en) * | 1973-03-08 | 1974-12-24 | Siemens Ag | Circuit arrangements including static converters |
DE19522302C2 (en) * | 1995-03-03 | 2001-01-25 | Stn Atlas Elektronik Gmbh | Marine propulsion system |
EP0730333A2 (en) * | 1995-03-03 | 1996-09-04 | Klaus Dr. Kranert | Ship propulsion system |
DE29823737U1 (en) * | 1998-12-23 | 1999-09-30 | Siemens Ag | Semi-submersible heavy lift |
US6150731A (en) * | 1999-02-16 | 2000-11-21 | Electric Boat Corporation | Integrated high frequency marine power distribution arrangement with transformerless high voltage variable speed drive |
DE50006082D1 (en) * | 1999-06-24 | 2004-05-19 | Siemens Ag | DRIVE AND DRIVE SYSTEM FOR SHIPS |
GB0003706D0 (en) * | 2000-02-18 | 2000-04-05 | Alstom | Control system adapted to control operation of an AC/DC converter |
-
2001
- 2001-06-11 DE DE2001128152 patent/DE10128152B4/en not_active Expired - Fee Related
-
2002
- 2002-06-07 EP EP02745129A patent/EP1395487A1/en not_active Withdrawn
- 2002-06-07 WO PCT/DE2002/002100 patent/WO2002100716A1/en not_active Application Discontinuation
- 2002-06-07 CN CNA028117468A patent/CN1514791A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO02100716A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002100716A1 (en) | 2002-12-19 |
DE10128152B4 (en) | 2004-08-19 |
DE10128152A1 (en) | 2002-12-19 |
CN1514791A (en) | 2004-07-21 |
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