WO2001084689A1 - Distribution system for electrical power - Google Patents
Distribution system for electrical power Download PDFInfo
- Publication number
- WO2001084689A1 WO2001084689A1 PCT/NO2001/000181 NO0100181W WO0184689A1 WO 2001084689 A1 WO2001084689 A1 WO 2001084689A1 NO 0100181 W NO0100181 W NO 0100181W WO 0184689 A1 WO0184689 A1 WO 0184689A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power
- arrangement according
- rectifier
- phase
- distribution
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/08—Three-wire systems; Systems having more than three wires
-
- 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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Definitions
- the present invention rel.ate-s to an.--arrangement for DC power distribution in particular for use in subsea and offshore environment .
- Power distribution systems are widely ' used e.g. in the offshore industry supplying several installation requiring high power input, but today there are no subsea power distribution network commercially available.
- Present technology is based upon AC-solutions and AC-components .
- the main inconvenience of the AC-solution is the limitation in the length of cable.
- the length of the cable from e.g. platform topside or onshore connection is limited due to large capasitive charging currents in the cables. I ' the charging current is equal to the thermal current limit of the cable, it will not be possible to transfer any power.
- the total length of cables in the network will decide the size of the charging currents.
- Another problem connected to an AC- distribution network is the need of transformers, which are large and heavy components. Frequency converters are also often used for flow control and for keeping the operational cost low.
- the object of the present invention is to provide an arrangement eliminating the drawbacks '" described above.
- a specific object of the present invention is to provide an arrangement having less limitations concerning cable length of a distribution network.
- a further object of the invention is to provide an arrangement without the need of several numbers of large transformers.
- the present invention attempts to decrease the number, size and weight of all components in a power distribution network.
- the mainland or local power grid interface consist of two three-core transformers. Each transformer is connected to a rectifier bridge. Cables or transmission lines will distribute the DC power. The use of cable could become the most common distribution channel. The channel is terminated to one or more locations where voltage source inverters generate AC voltage sources that can supply individual consumers or a power distribution system.
- the drawings show the principals of a DC power distributioon system consisting two electrical poles: "+” and "-" with a neutral conductor tha may be earthed for insulation leve control.
- Fig. 1 shows the overall principal electrical power system
- Fig. 2 demonstrates an additional configuration of the power system
- Fig. 3 reveals the circuit diagram comprising the power electronic components. Description of preferred embodiment
- the system presented in Fig. 1 comprise of two three-core transformers (1) .
- the primary windings of the two parallel transformers (2) can be shifted ⁇ 7.5 electrical degrees to make the two 12-pulse inverter bridges (3) act like 24- pulse rectifiers.
- the DC power distribution system generates very small amounts of harmonic distortion into the local mainland grid. This is especially important if the power is supplied from a power grid with local generation as for an offshore oil & gas platform. This will limit the need for harmonic filters, which would increase cost, weight and need for space on the platform.
- each three-core transformer (1) is connected to a rectifier bridge (3) .
- the rectifiers work as classic three-phase diode bridge rectifiers, but they are recommended to be implemented with thyristors. Thyristors can operate as breakers that are able to isolate the distribution system from the supplying grid faster than a circuit breaker. They can also control the initial charging of the DC channel to reduce negative effects on internal components and the supplying grid.
- the rectifier bridges are connected in series to increase the distribution voltage as shown i Fig. 3 (3) .
- the point of serial connection between the two transformers and the rectifiers is resistance earthed to control the insulation voltage level in the channel for DC power distribution.
- the distribution channel (4) distributing the DC power from the rectifier-bridge, is three-phase lines or cables connected to the positive phase (5), negative phase (6) and the resistance earthed neutral phase (7) of the rectifier bridges .
- phase is being used in the meaning of electrical poles. In normal operation, the current mainly flows in the positive and negative phase of the distribution channel. If the circuit is not symmetrically loaded, the unsymmetrical part of the current flows in the "neutral" phase terminated to the resistance earthed serial connection point.
- the faulted half of the distribution system can be shut down by the thyristors without influencing the other half. This makes the maximum available power decrease to half of rated value and the consumers connected to the faulted half will lose o their power.
- the cables may be connected to the individual subsea modules by wet- mateable connectors (8).
- Wet-mateable connectors are commercial available for 11 kV AC-voltage, but will in s short time be available for 36 kV. It is assumed that some of these connectors also can be used for DC-voltages after a de-rating.
- Voltage Source Inverters (9) o generates AC voltage sources that can supply individual consumers (10) or an AC power distribution system.
- the selected DC to AC inverter technology is a Voltage Source Inverter technology applying switching semiconductors like Insulate Gate Bipolar Transistors (IGBT) , Gate Turn Off 5 thyristors (GTO) , or Integrated Gate Commutated Thyristors (IGCT) . These semiconductors are well known in the industry, thus they are not described here.
- the VSI generates Pulse-Width-Modulated AC voltage to an AC-motor or AC-power distribution system from the capacitor o supported DC link.
- the IGBT technology is probably the most natural choice.
- the VSI technology enables several consumers to be independently connected to the DC link. This again makes it easy to connect the power channels to several locations with multiple consumers.
- Present 5 commercial available technology for DC to AC inverters is from 0 to 6 kV.
- the DC links of two inverters are connected in series to make up one drive
- One drive is connected between either the positive phase (5) and earth (7) or negative phase (6) and earth/neutral (7).
- the squirrel-cage type AC-motors are built with a double set of electrical three-phase stator windings.
- the two series connected inverters supply one of the two three-phase windings of the AC-motor each, see Figure 1 and Figure 3.
- One single offshore installation can be supplied with DC power from shore and/or from another offshore installation.
- Electrical DC power cables can connect several offshore installations, enabling them to buy and sell electrical power from each other.
- the grid can be connected as a ring or semi-radial power system among the offshore installations for increased availability.
- the grid can also have one or several connections to the mainland for the same reasons .
- Subsea installations comprising pumps and compressors can be supplied with DC power from shore or from an offshore installation as shown in Figure 1.
- the distribution channel can be connected to one template and continue to the next.
- the DC power system can include connections to several templates .
- One or several islands can be supplied with electrical power from shore. The arrangement of the inverters will be extra suitable with large individual consumers on the island.
- Equation 1 shows the voltage multiplied with the standard conversion factor of 1.34 for conversion from AC-voltage to the equivalent DC voltage.
- two series connected o VSDs are connected between each phase and earth of the distribution channel.
- the voltage between the positive and negative phases is then approximately 32 kV. 5
- a 300 mm 2 three-core subsea cable has a thermal current-limit of approximately. 675 A, which gives a maximum transferred power as given in equation 2.
- the power system then gives a DC distribution voltage of approximately ⁇ 30 kV, which again gives a voltage between the positive and negative phases of 60 kV.
- the maximum-transferred power will be as given in equation 4.
- a total DC power of approximately 40 MVA can be transferred through one 300 mm 2 three-core cable or two 1X300/150 mm 2 coaxial power cables. For long distances this can contribute to large cost savings by minimizing the procurement costs and installation costs for the distribution cable (s).
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Optical Communication System (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU58948/01A AU5894801A (en) | 2000-04-28 | 2001-05-16 | Distribution system for electrical power |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20002284 | 2000-04-28 | ||
NO20002284A NO312080B1 (en) | 2000-04-28 | 2000-04-28 | Electric power distribution system |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001084689A1 true WO2001084689A1 (en) | 2001-11-08 |
Family
ID=19911075
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2001/000181 WO2001084689A1 (en) | 2000-04-28 | 2001-04-30 | Distribution system for electrical power |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU5894801A (en) |
NO (1) | NO312080B1 (en) |
WO (1) | WO2001084689A1 (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002037640A1 (en) * | 2000-10-30 | 2002-05-10 | Cooper Cameron Corporation | Control and supply system |
EP1389818A1 (en) * | 2002-08-16 | 2004-02-18 | Bombardier Transportation (Technology) GmbH | Electrical power supply for a rail vehicle |
EP2293407A1 (en) * | 2009-09-08 | 2011-03-09 | Converteam Technology Ltd | Power transmission and distribution systems |
EP2390460A2 (en) | 2010-05-27 | 2011-11-30 | Vetco Gray Controls Limited | Extending the life of a compromised umbilical |
WO2012038100A1 (en) * | 2010-09-24 | 2012-03-29 | Siemens Aktiengesellschaft | Subsea dc transmission system |
US20120142537A1 (en) * | 2010-12-02 | 2012-06-07 | Lighthouse Energy Solutions LLC | Superconducting direct current transmission system |
WO2012164029A3 (en) * | 2011-06-01 | 2013-06-20 | Total Sa | Subsea electrical architectures |
US8492927B2 (en) | 2001-09-19 | 2013-07-23 | Cameron International Corporation | Universal power supply system |
WO2014189675A2 (en) * | 2013-05-24 | 2014-11-27 | Eaton Corporation | High voltage direct current transmission and distribution system |
WO2015018418A1 (en) * | 2013-08-09 | 2015-02-12 | Vestas Wind Systems A/S | Electricity transmission |
EP2848762A1 (en) * | 2013-09-11 | 2015-03-18 | Alcatel Lucent | Providing power to a subsea node |
NO338399B1 (en) * | 2014-11-10 | 2016-08-15 | Vetco Gray Scandinavia As | Installations for supplying electrical power to subsea low voltage loads |
US9608431B2 (en) | 2010-12-02 | 2017-03-28 | Lighthouse Energy Solutions LLC | System and method to interrupt a DC current in a high voltage circuit by use of an AC circuit breaker |
RU2658675C1 (en) * | 2016-12-29 | 2018-06-22 | Юрий Леонидович Беньяш | Method and three-wire dc power supply system (options) |
US10236687B2 (en) | 2015-04-16 | 2019-03-19 | Vestas Wind Systems A/S | Fault tolerant wind turbine converter system |
US10298140B2 (en) | 2015-04-16 | 2019-05-21 | Vestas Wind Systems A/S | Wind turbine converter control |
RU2736579C1 (en) * | 2020-07-14 | 2020-11-18 | федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский горный университет» | Method of transmitting electricity with direct current through a multi-wire power line and a device for its implementation |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1984002807A1 (en) * | 1983-01-14 | 1984-07-19 | Ass Elect Ind | Direct current cable protection system |
US4941079A (en) * | 1988-10-07 | 1990-07-10 | The Royal Institution For The Advancement Of Learning | Pulse width modulation power transmission system |
EP0554804A1 (en) * | 1992-01-30 | 1993-08-11 | Hitachi, Ltd. | Control equipment for high voltage direct current transmission system |
EP0868002A1 (en) * | 1997-03-24 | 1998-09-30 | Asea Brown Boveri Ab | A plant for transmitting electric power |
US5901053A (en) * | 1997-03-24 | 1999-05-04 | Asea Brown Boveri Ab | Plant for transmitting electric power to remote facilities which have an electric motor load |
-
2000
- 2000-04-28 NO NO20002284A patent/NO312080B1/en not_active IP Right Cessation
-
2001
- 2001-04-30 WO PCT/NO2001/000181 patent/WO2001084689A1/en active Application Filing
- 2001-05-16 AU AU58948/01A patent/AU5894801A/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1984002807A1 (en) * | 1983-01-14 | 1984-07-19 | Ass Elect Ind | Direct current cable protection system |
US4941079A (en) * | 1988-10-07 | 1990-07-10 | The Royal Institution For The Advancement Of Learning | Pulse width modulation power transmission system |
EP0554804A1 (en) * | 1992-01-30 | 1993-08-11 | Hitachi, Ltd. | Control equipment for high voltage direct current transmission system |
EP0868002A1 (en) * | 1997-03-24 | 1998-09-30 | Asea Brown Boveri Ab | A plant for transmitting electric power |
US5901053A (en) * | 1997-03-24 | 1999-05-04 | Asea Brown Boveri Ab | Plant for transmitting electric power to remote facilities which have an electric motor load |
Cited By (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002037640A1 (en) * | 2000-10-30 | 2002-05-10 | Cooper Cameron Corporation | Control and supply system |
US8492927B2 (en) | 2001-09-19 | 2013-07-23 | Cameron International Corporation | Universal power supply system |
EP1389818A1 (en) * | 2002-08-16 | 2004-02-18 | Bombardier Transportation (Technology) GmbH | Electrical power supply for a rail vehicle |
WO2011029566A1 (en) * | 2009-09-08 | 2011-03-17 | Converteam Technology Ltd | Power transmission and distribution systems |
US9030042B2 (en) | 2009-09-08 | 2015-05-12 | Ge Energy Power Conversion Technology Ltd. | Power transmission and distribution systems |
EP2293407A1 (en) * | 2009-09-08 | 2011-03-09 | Converteam Technology Ltd | Power transmission and distribution systems |
EP2390460A2 (en) | 2010-05-27 | 2011-11-30 | Vetco Gray Controls Limited | Extending the life of a compromised umbilical |
US9650886B2 (en) | 2010-05-27 | 2017-05-16 | Vetco Gray Controls Limited | Extending the life of a compromised umbilical |
GB2480652B (en) * | 2010-05-27 | 2015-07-29 | Ge Oil & Gas Uk Ltd | Extending the life of a compromised umbilical |
WO2012038100A1 (en) * | 2010-09-24 | 2012-03-29 | Siemens Aktiengesellschaft | Subsea dc transmission system |
US20120142537A1 (en) * | 2010-12-02 | 2012-06-07 | Lighthouse Energy Solutions LLC | Superconducting direct current transmission system |
WO2012075416A1 (en) * | 2010-12-02 | 2012-06-07 | Lighthouse Energy Solutions, Llc | Superconducting direct current transmission system |
US8774883B2 (en) | 2010-12-02 | 2014-07-08 | Lighthouse Energy Solutions LLC | Superconducting direct current transmission system |
US9608431B2 (en) | 2010-12-02 | 2017-03-28 | Lighthouse Energy Solutions LLC | System and method to interrupt a DC current in a high voltage circuit by use of an AC circuit breaker |
US9236167B2 (en) | 2010-12-02 | 2016-01-12 | Lighthouse Energy Solutions LLC | Superconducting direct current transmission system |
WO2012164029A3 (en) * | 2011-06-01 | 2013-06-20 | Total Sa | Subsea electrical architectures |
GB2508991B (en) * | 2011-06-01 | 2016-06-29 | Total Sa | Subsea electrical architectures |
NO346255B1 (en) * | 2011-06-01 | 2022-05-16 | Total Sa | SUBSIDIARY INSTALLATION FOR POWER DISTRIBUTION FOR SUBSERVE EQUIPMENT |
US9859805B2 (en) | 2011-06-01 | 2018-01-02 | Total Sa | Subsea electrical architectures |
GB2508991A (en) * | 2011-06-01 | 2014-06-18 | Total Sa | Subsea electrical architectures |
US9270119B2 (en) | 2013-05-24 | 2016-02-23 | Eaton Corporation | High voltage direct current transmission and distribution system |
WO2014189675A2 (en) * | 2013-05-24 | 2014-11-27 | Eaton Corporation | High voltage direct current transmission and distribution system |
WO2014189675A3 (en) * | 2013-05-24 | 2015-01-22 | Eaton Corporation | High voltage direct current transmission and distribution system |
US9673629B2 (en) | 2013-05-24 | 2017-06-06 | Eaton Corporation | High voltage direct current transmission and distribution system |
EP4160850A1 (en) * | 2013-05-24 | 2023-04-05 | Eaton Intelligent Power Limited | High voltage direct current transmission and distribution system |
WO2015018418A1 (en) * | 2013-08-09 | 2015-02-12 | Vestas Wind Systems A/S | Electricity transmission |
US10044186B2 (en) | 2013-08-09 | 2018-08-07 | Vestas Wind Systems A/S | AC and DC electricity transmission using a multiple-core cable |
WO2015036483A1 (en) * | 2013-09-11 | 2015-03-19 | Alcatel Lucent | Providing power to a subsea node |
EP2848762A1 (en) * | 2013-09-11 | 2015-03-18 | Alcatel Lucent | Providing power to a subsea node |
NO338399B1 (en) * | 2014-11-10 | 2016-08-15 | Vetco Gray Scandinavia As | Installations for supplying electrical power to subsea low voltage loads |
US10298140B2 (en) | 2015-04-16 | 2019-05-21 | Vestas Wind Systems A/S | Wind turbine converter control |
US10236687B2 (en) | 2015-04-16 | 2019-03-19 | Vestas Wind Systems A/S | Fault tolerant wind turbine converter system |
RU2658675C1 (en) * | 2016-12-29 | 2018-06-22 | Юрий Леонидович Беньяш | Method and three-wire dc power supply system (options) |
RU2736579C1 (en) * | 2020-07-14 | 2020-11-18 | федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский горный университет» | Method of transmitting electricity with direct current through a multi-wire power line and a device for its implementation |
Also Published As
Publication number | Publication date |
---|---|
NO312080B1 (en) | 2002-03-11 |
NO20002284L (en) | 2001-10-29 |
AU5894801A (en) | 2001-11-12 |
NO20002284D0 (en) | 2000-04-28 |
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