WO2009083639A1 - Modelling a power production network for distributing the load - Google Patents
Modelling a power production network for distributing the load Download PDFInfo
- Publication number
- WO2009083639A1 WO2009083639A1 PCT/FI2008/050702 FI2008050702W WO2009083639A1 WO 2009083639 A1 WO2009083639 A1 WO 2009083639A1 FI 2008050702 W FI2008050702 W FI 2008050702W WO 2009083639 A1 WO2009083639 A1 WO 2009083639A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power transmission
- switches
- transmission network
- modelling
- generator
- Prior art date
Links
Classifications
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/42—The network being an on-board power network, i.e. within a vehicle for ships or vessels
-
- 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
- H02J4/00—Circuit arrangements for mains or distribution networks not specified as ac or dc
Definitions
- the present invention relates to an electric power transmission network to which electricity-producing devices and loads can be connected.
- the invention especially relates to electrical power transfer networks in ships.
- Generators are connected thereto for supplying the ship's demand of electric power.
- Each generator is driven by a power source, such as a diesel engine.
- the generators run in the electric network at the same speed so as to have the same frequency in all places of the electric network. It is not possible to economically store electricity, so the production of electricity must correspond to the consumption of electricity of the network. Thus there must be some kind of arrangement in the power transmission network for distributing the load among the generators.
- a known way is to use droop adjustment, i.e. deviation adjustment.
- Each generator has a power production line as a function of the frequency of the network.
- the frequency of the network tends to increase, and when the load is small, the frequency tends to increase.
- the disadvantage is that the frequency of the constant state of the system depends on the load of the system.
- isosynchronic load distribution Another way is to use so-called isosynchronic load distribution.
- the average load of the system is used for establishing the set values for the generators for distributing the load.
- the principle of the isosynchronic adjustment is similar to deviation adjustment, but it does not depend so much on the load of the network.
- Digital data communication buses have become more common to replace the older analog buses used for load distribution.
- the advantages of digital buses are their accuracy, reliability, lack of disturbances.
- Analog solutions have, however, been very adaptable to various configurations of the network. With a digital solution, it is difficult to mimic an analog power transmission network.
- the power transmission network comprises switches the state of which can be changed, if necessary, either automatically or manually.
- Software, circuit board or other apparatus used for load distribution easily becomes very complex.
- the aim of the present invention is to reduce the above-mentioned disadvantages caused by digital solutions.
- the aim is achieved as described in the main claim.
- the dependent claims describe the various embodiments of the invention.
- the modelling arrangement of the configuration situation of the electric power transmission network comprises a modelling element 7 designed to be installed in each generator of the electric power transmission network.
- each generator 1 can be connected to other generators via two separate connection routes provided with a switch 2, 3.
- the power transmission network is a line or a loop and the generators have consecutive identifiers.
- the modelling element 7 is arranged to measure the state of the said switches on both connection routes until an open switch is detected at the routes and to detect the corresponding generator on the basis of the closed switch and to model the power transmission network comprising the detected generators and the area of the power transmission network belonging to the same electric circuit via closed switches.
- FIG. 1 illustrates an example of the power transmission network connection of the generator according to the invention
- FIGS 2 and 3 illustrate the possible network topologies
- Figure 4 illustrates the detection of the network according to the invention
- Figure 5 is an example of a data communications vector sent in the data communications network and Figure 6 is an example of the inventive method.
- FIG. 1 illustrates an example of a generator 1 and its connection to a power transmission network 4.
- the generator is connected to the power transmission network by two switches 2, 3.
- the part between the switches can be interpreted as being a part of the power transmission network, because electric current can flow through it when at least one switch is closed. Due to two switches, electric power can be fed from the generator to both directions of the power transmission network 4 or to either direction only.
- Generator 1 is driven by, for example, an internal combustion piston engine or a gas turbine. Due to the use of two generator-specific switches the power transmission network is very adaptable. Thus, each generator has two connection routes to the rest of the network.
- Figures 2 and 3 illustrate possible network topologies.
- the power transmission network 4, 5 can be a line or a loop. These are the only possible network topologies for detecting of the network according to the invention. In relatively small networks, such as in ships, this is not a disadvantage. In fact, this can facilitate planning of the network.
- Each generator 1 - 1 G has its own identifier. Consecutive machines in the network have consecutive identifiers. If a new generator is added to a point in an existing network, it and the generators after it must be given a new identifier. Thus the identifier of the generator can be used for outlining the position of the generator, as is shown later.
- FIG. 4 illustrates an example of the operation according to the invention.
- a CAN bus (Controller Area Network) 6 is used for transmitting the data.
- the transmission takes place as a common transmission, i.e. all generators see the same data.
- the data are sent in, for example, a data vector (figure 5) comprising generator-specific elements 12.
- the generator- specific element begins with the generator identifier 13, subsequent to which there are fields for various signal data, parameters and status data 14 of the switches. Each generator updates the element shown to it.
- the generator N+1 more specifically the network determining element 7 of the generator determines the statuses of the power transmission network 4.
- the determining is made by measuring, for example, wave impedance from the power transmission network for determining whether the switches are closed or open.
- the determining process is started in one direction in the network. It is preferable to determine the checking directions and sequence in order to utilize the generator-specific identifiers. In this text the directions are determined either "forward" or "backward".
- the checking directions can, however, be named as desired. Additionally the checking direction sequence can also be carried out in the preferred sequence: "forward" first or "backward” first.
- the generator N+1 starts determining the statuses of the switches "backwards", whereby the first encountered switch 8 is observed to be closed, i.e. its status value is 1 in this example.
- the network determining element 7 can from this measurement detect that the generator N belongs to the same area of the power transmission network belonging to the same electric circuit.
- the determining of status is continued "backwards", until the switch 9, being open, is detected.
- Such a switch gets a status of 0.
- An open switch means that the following generator does not belong to the same area of the power transmission network and the checking in that direction can be ended. All switches that have been detected to be closed simultaneously indicate the generators (the generator following the switch) belonging to the same group. This is possible by using consecutive generator-specific identifiers.
- Each generator performs the switch status check and the modelling of the network area and comprises a similar network determination element 7 and independently determines which other generators belong to the same power transmission network.
- the network determination element can be realized as a software or an electric circuit.
- the software can be loaded into the memory of the generator and executed in a processor suitable for the purpose.
- An embodiment for this is an ASIC circuit (Application Specific Integrated Circuit).
- the generators in the same electric circuit can divide the load by using the data about the average load of the network and the current load. Even though the figures do not show the loads, it is obvious that loads can be connected to the electric power transmission network.
- Figure 6 shows an example of the method according to the invention for modelling the configuration situation of the electric power transmission network of ships.
- the method is designed to be carried out in each generator of the electric power transmission network. As was mentioned in the above, in the network each generator
- the method comprises the steps of: measuring 62, 64 the state of the said switches on both connection routes until an open switch 63, 66 is detected at the routes, detecting 63 the corresponding generator on the basis of the closed switch and thus modelling 65 the part of the power transmission network comprising the detected generators and the area of the power transmission network belonging to the same electric network via closed switches.
- the detection and modelling step the configuration of the network and the consecutive identifiers of the network are used.
- the measuring step is preferably arranged to first measure the status of the switches of the first connection route, subsequent to which the status of the switches of the other connection route is measured.
- the measuring is started with the first route 61.
- the status of the first detected switch is measured 62. If the switch is closed 63, the next switch of the first route is measured. Because the switch is closed, the generator corresponding to it is added to the same part of the network as the generator 65 performing the measurement. Thus the modelling of the part of the network progresses at each measurement.
- the measurement detects a switch with the status "open” the measurement 66 of the route is stopped and the system check whether the other route has already been measured 67. If both routes have been measured 67, measurement of the second route 68 is started. The measurement of the second route is performed in the same way as that of the first route.
- the measurement data of the switches are arranged to be transmitted to a certain point of the data vector, the data vector being arranged to be commonly transmitted to other generators of the power transmission network.
- the method like the apparatus, is arranged to repeatedly measure the status data of the switches.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT08867340T ATE510340T1 (en) | 2007-12-27 | 2008-12-02 | MODELING A POWER GENERATION NETWORK FOR DISTRIBUTING LOAD |
KR1020107014234A KR101518093B1 (en) | 2007-12-27 | 2008-12-02 | Modelling a power production network for distributing the load |
US12/810,111 US8310245B2 (en) | 2007-12-27 | 2008-12-02 | Modelling a power production network for distributing the load |
DK08867340.5T DK2223410T3 (en) | 2007-12-27 | 2008-12-02 | Modeling energy production networks to distribute the load |
CN2008801197166A CN101897101B (en) | 2007-12-27 | 2008-12-02 | Modelling a power production network for distributing the load |
EP08867340A EP2223410B1 (en) | 2007-12-27 | 2008-12-02 | Modelling a power production network for distributing the load |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20075966A FI121406B (en) | 2007-12-27 | 2007-12-27 | Modeling of a power generation network for distribution of load |
FI20075966 | 2007-12-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009083639A1 true WO2009083639A1 (en) | 2009-07-09 |
Family
ID=38951661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI2008/050702 WO2009083639A1 (en) | 2007-12-27 | 2008-12-02 | Modelling a power production network for distributing the load |
Country Status (8)
Country | Link |
---|---|
US (1) | US8310245B2 (en) |
EP (1) | EP2223410B1 (en) |
KR (1) | KR101518093B1 (en) |
CN (1) | CN101897101B (en) |
AT (1) | ATE510340T1 (en) |
DK (1) | DK2223410T3 (en) |
FI (1) | FI121406B (en) |
WO (1) | WO2009083639A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015155405A1 (en) | 2014-04-10 | 2015-10-15 | Wärtsilä Finland Oy | Control unit for a power engine unit |
WO2016042199A1 (en) | 2014-09-16 | 2016-03-24 | Wärtsilä Finland Oy | A control method and system for driving a power engine unit either in a speed control mode or in a load control mode, and changing the control mode |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101976882B (en) * | 2010-09-21 | 2013-01-16 | 深圳市华力特电气股份有限公司 | Master control unit applied to power system |
CN107517533B (en) * | 2017-08-11 | 2019-10-29 | 四川华体照明科技股份有限公司 | A kind of self-adapting type street lamp loop ownership rapid detection system and method based on NB-IoT |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US4808835A (en) * | 1986-07-03 | 1989-02-28 | Mitsubishi Jukogyo Kabushiki Kaisha | Power generation cassette type power plant for marine electric propulsion and a controller thereof |
Family Cites Families (6)
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GB9015981D0 (en) * | 1990-07-20 | 1990-09-05 | Chudley Bernard J | Electrical test apparatus |
DE19739917A1 (en) * | 1997-09-11 | 1999-03-18 | Siemens Ag | System for supplying electromotive consumers with electrical energy |
DE10104892A1 (en) | 2001-02-01 | 2002-08-14 | Siemens Ag | Ship Electric System |
JP3576528B2 (en) * | 2001-12-13 | 2004-10-13 | 三菱重工業株式会社 | Electric propulsion ship simulation apparatus and electric propulsion ship simulation method |
CN2872700Y (en) * | 2005-10-28 | 2007-02-21 | 马国书 | Marine power-supply system |
NO327025B1 (en) | 2005-12-07 | 2009-04-06 | Marine Cybernetics As | Method and system for improved DP / PMS testing of a marine regulatory system |
-
2007
- 2007-12-27 FI FI20075966A patent/FI121406B/en not_active IP Right Cessation
-
2008
- 2008-12-02 EP EP08867340A patent/EP2223410B1/en active Active
- 2008-12-02 WO PCT/FI2008/050702 patent/WO2009083639A1/en active Application Filing
- 2008-12-02 CN CN2008801197166A patent/CN101897101B/en active Active
- 2008-12-02 DK DK08867340.5T patent/DK2223410T3/en active
- 2008-12-02 US US12/810,111 patent/US8310245B2/en active Active
- 2008-12-02 KR KR1020107014234A patent/KR101518093B1/en active IP Right Grant
- 2008-12-02 AT AT08867340T patent/ATE510340T1/en active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4808835A (en) * | 1986-07-03 | 1989-02-28 | Mitsubishi Jukogyo Kabushiki Kaisha | Power generation cassette type power plant for marine electric propulsion and a controller thereof |
Non-Patent Citations (1)
Title |
---|
KAI HUANG ET AL: "A novel algorithm for agent based reconfiguration of ring-structured shipboard power system", INDUSTRY APPLICATIONS CONFERENCE, 2005. FOURTIETH IAS ANNUAL MEETING. CONFERENCE RECORD OF THE 2005 HONG KONG, CHINA 2-6 OCT. 2005, PISCATAWAY, NJ, USA,IEEE, vol. 2, 2 October 2005 (2005-10-02), pages 1311 - 1316, XP010842552, ISBN: 978-0-7803-9208-3 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015155405A1 (en) | 2014-04-10 | 2015-10-15 | Wärtsilä Finland Oy | Control unit for a power engine unit |
CN106068589A (en) * | 2014-04-10 | 2016-11-02 | 瓦锡兰芬兰有限公司 | Control unit for power engine unit |
KR20180117223A (en) * | 2014-04-10 | 2018-10-26 | 바르실라 핀랜드 오이 | Control unit for a power engine unit |
KR102012614B1 (en) * | 2014-04-10 | 2019-08-20 | 바르실라 핀랜드 오이 | Control unit for a power engine unit |
WO2016042199A1 (en) | 2014-09-16 | 2016-03-24 | Wärtsilä Finland Oy | A control method and system for driving a power engine unit either in a speed control mode or in a load control mode, and changing the control mode |
Also Published As
Publication number | Publication date |
---|---|
US8310245B2 (en) | 2012-11-13 |
EP2223410A1 (en) | 2010-09-01 |
CN101897101A (en) | 2010-11-24 |
EP2223410B1 (en) | 2011-05-18 |
FI121406B (en) | 2010-10-29 |
US20100280816A1 (en) | 2010-11-04 |
KR20100109916A (en) | 2010-10-11 |
FI20075966A0 (en) | 2007-12-27 |
KR101518093B1 (en) | 2015-05-06 |
FI20075966A (en) | 2009-06-28 |
ATE510340T1 (en) | 2011-06-15 |
CN101897101B (en) | 2012-10-17 |
DK2223410T3 (en) | 2011-08-15 |
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