WO2013189525A1 - Transport de courant continu à haute tension comportant plusieurs prises - Google Patents

Transport de courant continu à haute tension comportant plusieurs prises Download PDF

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Publication number
WO2013189525A1
WO2013189525A1 PCT/EP2012/061729 EP2012061729W WO2013189525A1 WO 2013189525 A1 WO2013189525 A1 WO 2013189525A1 EP 2012061729 W EP2012061729 W EP 2012061729W WO 2013189525 A1 WO2013189525 A1 WO 2013189525A1
Authority
WO
WIPO (PCT)
Prior art keywords
tap
serial
voltage
direct current
voltage direct
Prior art date
Application number
PCT/EP2012/061729
Other languages
German (de)
English (en)
Inventor
Hans-Joachim Knaak
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to PCT/EP2012/061729 priority Critical patent/WO2013189525A1/fr
Priority to EP12735221.9A priority patent/EP2850713A1/fr
Publication of WO2013189525A1 publication Critical patent/WO2013189525A1/fr

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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
    • H02J3/36—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 invention relates to a high-voltage direct-current transmission line (HVDC link), a device for an HVDC link, and a method for transferring electrical power from or to an HVDC link.
  • HVDC link high-voltage direct-current transmission line
  • DC about ⁇ transmission has the disadvantage that extending or couplings of electrical energy are relatively complex on the track. This is especially true for electrical services that are low in terms of transmitted power.
  • tapping is used synonymously with the term tapping.
  • tapping device In a so-called serial tapping a tapping device is arranged in a line branch, the tapping device (in particular the power electronics) is traversed by the entire main stream of the transmission line.
  • the tapping device is connected, for example, to both lines of the transmission path, ie parallel to the source or Valley arranged.
  • the tapping device must be designed for the entire voltage of the transmission link .
  • MMC modular multilevel inverters
  • This basic module is also called a submodule (also: converter module). It is known to connect a large number of such submodules in series in order to achieve high-voltage stability.
  • Fig.l shows an example of such an arrangement, wherein an AC network 101 is connected via a transformer 102 with an MMC 103 and thus with a DC voltage network (with terminals 105 and 106).
  • the MMC 103 comprises ei ⁇ ne plurality of submodules 104, wherein the construction of a submodule 104 is shown as an example:
  • An electronic switch Tl is connected in series with a second electronic switch T2, each electronic switch Tl, T2 a diode Dl, D2 in opposite directions is connected in parallel. Parallel to the series connection of the electronic switches Tl and T2, a capacitor C is arranged.
  • the electronic switches may be transistors, eg bipolar transistors, in particular IGBTs.
  • the submodule 104 represents a two-terminal, which is connected on the one hand with a Mittenab ⁇ grip between the switches Tl, T2 and on the other hand to a pole of the capacitor C.
  • WO2010 / 115453A1 proposes voltage compensation in DC transmission networks. There, longitudinal voltage sources are inserted in DC transmission lines in order to reduce the voltage in DC grids at all points in a permissible gene range. By inserting the longitudinal voltage source, the DC system is unavoidably supplied or removed with energy at this point. According to WO2010 / 115453 this energy is taken from an existing three-phase network or by means of an additional device from the direct current line itself.
  • the object of the invention to provide an efficient Mög ⁇ friendliness for removal or for feed of electrical energy from or in a HVDC transmission line.
  • HVDC link a device for a high-voltage direct-current transmission line
  • serial and the parallel tap je ⁇ Weils or in combination with each other provide electrical power for an AC network or an electrical power from the AC mains in the high voltage DC power transmission line can be fed.
  • the tap may be a means for serial or parallel connection to or with the transmission link.
  • a voltage compensation can take place.
  • a longitudinal voltage which is favorable for the HVDC route can be flexibly coupled in.
  • the device has a further serial tap in another line of the high-voltage direct current transmission path.
  • a serial tap can be provided in each DC line (branch) of the HVDC line.
  • serial tap has at least one controllable longitudinal voltage source.
  • serial tap also a controllable source of longitudinal voltage can be realized.
  • the power, the voltage and / or the current are tapped or fed quantities.
  • the longitudinal voltage source may adjust the current indi ⁇ rectly on the voltage. It is also possible that the longitudinal voltage source allows the clamping voltage ⁇ adjustment between two DC networks. The energy required for this can be achieved with the shunt arm and / or an AC network be replaced. For this purpose, the longitudinal voltage source is arranged, for example, between two DC networks.
  • serial and / or the parallel tap has / have submodules.
  • the submodule has a half-bridge circuit. It is also a development that the submodule has a full ⁇ bridge circuit.
  • serial and / or parallel tap has a grid-controlled inverter.
  • serial tap and the parallel tap are coupled or connected to an AC mains.
  • the serial tap can be powered by the DC line of the transmission line itself.
  • a next embodiment is that -
  • the serial tap provides the electrical power for the AC mains or feeds the electrical power from the AC mains in the high voltage DC power transmission line, - wherein an energy from the parallel tap ent ⁇ is acceptable or fed back into this.
  • the respective energy can be taken as power from the parallel tap or (in this) fed back.
  • serial tap and the parallel tap for symmetrizing voltages and currents can be used. This applies in particular to bipolar systems. It can be effected in ⁇ example, a simultaneous balancing of voltages and currents in the positive and in the negative system.
  • the above object is also achieved by a high-voltage direct-current transmission path
  • serial and the parallel tap je ⁇ Weils or in combination with each other provide electrical power for an AC mains or feed electrical power from the AC mains in the high-voltage DC transmission line.
  • a method is proposed to solve the problem for the transfer of electrical power in a high-voltage direct -current transmission path or from a high-voltage ⁇ DC transmission path, in which, by means of a serial tap, the electrical power is supplied to an AC network or fed into the high-voltage DC transmission link (eg from the AC network),
  • a development consists in that based on the serial tap and / or the parallel tap voltage compensation, in particular a longitudinal voltage compensation, the high-voltage direct current transmission path is performed.
  • the longitudinal voltage source is connected to a DC network via a respective terminal and thus a voltage adaptation between two DC networks is different
  • the longitudinal voltage source can allow men ⁇ together with the transverse branch or the AC terminal a controlled exchange of energy between two DC networks, regardless of their rated voltage or the currently existing voltage.
  • a control unit for controlling the multilevel inverters, so that a corresponding adaptation of the powers can be achieved.
  • FIG. 2 shows an exemplary schematic diagram with a serial tap and with a parallel tap of a HVDC link
  • FIG 3 shows an example of a serial tap under Ver ⁇ application of two AC side coupled multilevel inverter per tap.
  • HVDC line high-voltage dc transmission line
  • the serial tap is connected in series with a line of the HVDC link or forms part of the line of the HVDC link.
  • the parallel tap is connected to the two lines of the HVDC link.
  • a device which is connectable to a HVDC link and a parallel and a serial tap for any HVDC link has on ⁇ .
  • the device may have two connection terminals for connection to the HVDC route.
  • the taps for example, are each a two-pole.
  • the device may have at least one parallel and / or at least one serial tap.
  • the HVDC route can have one or more lines. It is advantageous that the serial and the parallel An ⁇ tap in each case or in combination with each other can provide an electrical power for an AC power network or that an electric power from the AC mains can be fed ⁇ in the high-voltage DC transmission line.
  • FIG. 2 shows an exemplary schematic diagram with a serial tap 207 and with a parallel tap 206.
  • a DC network 201 (may also consist of an HVDC station, for example) is connected to a DC network 204 via an additional (long) DC line 202 and an additional (long) DC line 203.
  • the DC network 204 may also be an HVDC station.
  • the serial tap 207 and the parallel tap 206 are located, wherein the serial tap 207 by way of example Zvi ⁇ rule is the lines of the HVDC transmission line in the top line of the transmission path and the parallel tap 206th Through the serial tap 207, a current I DC of the transmission path flows and at her falls from a voltage U se r.
  • the serial tap 207 provides in particular a three-phase AC ⁇ with a power P ser a Lei tung ⁇ 209 to an AC power grid 205 (also referred to as AC power).
  • the coupling or connection to the AC network (also referred to as AC coupling) is designed as a three-phase system with a grid frequency; In principle, other phase numbers and / or other frequencies are possible.
  • the parallel tap 206 provides a three-phase alternating current signal with a Leis ⁇ tung P par via a line 208 to the AC power 205th
  • the AC network 205 is provided by the parallel tap 206 and the serial tap 207 in total a power P ne tz.
  • the serial tap 207 and the tap 206 preferably have parallel multi-level inverter, which may be implemented as a half-bridge or full-bridge ⁇ and via a transformer (possibly several transformers) are coupled to the AC power 205th
  • the parallel tap 206 and the memoril ⁇ le tap 207 are located together, for example, housed in a common device and there connected to the AC network 205.
  • a coupling of electrical power from the AC network 205 into the HVDC transmission path can also take place.
  • the two DC lines 202 and 203 are optional, and the DC networks 201 and 204 may also be coupled via only one of the DC lines 202 or 203 or directly to each other.
  • the taps can be used simultaneously for energy extraction and voltage compensation. This advantageously takes advantage of the required components twice and leads to greater economic attractiveness. Furthermore, it is possible for the DC grid 201 and the DC grid 204 to each be an HVDC station, and thus also for a DC point-to-point connection to be realized.
  • the power supply to the desired serial tap 207 may be via the DC line itself.
  • the power P ne tz has a positive sign, if, for example, a remote region with electrical energy from the passed line to be supplied.
  • the power P ne tz can also have a negative sign, if, for example, energy from a nearby wind farm is to be fed into the DC line.
  • the respective energy corresponds to a power difference IP S er-Pnetz I and is taken as power P par from the parallel An ⁇ tapping 206 or fed back.
  • FIG. 2 was based, for example, on a DC transmission with two poles or lines. The explanations also apply accordingly to multi-pole DC transmission.
  • One or two parallel taps can be used, connected between each one pole and the earth.
  • Serial taps can be installed in one or both DC lines.
  • serial and paral ⁇ lele taps can be used in positive and negative system as required simultaneously for symmetry parameterization of voltages and / or currents.
  • symmetrically serial and parallel taps can be seen ⁇ which are controllable such that adjustment of the symmetric voltages and / or currents in the positive and negative system.
  • 3 shows an example of a serial tap of a device according to the invention.
  • the described serial tap may be coupled to a parallel tap as described above via connecting means.
  • a DC line 301 is symbolically interruptible by means of a switch Sl, so that the serial Anzap ⁇ tion shown in Figure 3 with the DC line 301 is functionally connected in series.
  • Each multi-level inverter of the serial tap shown in Figure 3 has a DC voltage connection 302 be ⁇ relationship as 314.
  • the DC terminal 302 is connected with three phase modules 303-305, having a series circuit of submodules 306-311.
  • Each phase module is equipped with an AC voltage connection, which is also referred to here as a tap.
  • a tap in the respective series circuit 303 to 305 provides a phase for a three-phase AC current and is correspondingly connected via a transformer 312 to an AC network 313 (consumer network).
  • the DC terminal 314 is connected to three parallel phase modules 315-317 from each of a plurality of series Submo ⁇ dulen 318-323.
  • a tap in the respective series circuit 315 to 317 supplies a phase for the three-phase AC signal and is correspondingly connected via the transformer 312 to the AC network 313 (consumer network).
  • a voltage Ul drops and at the parallel phase modules 315 to 317 a voltage U2 drops.
  • the paral ⁇ Lele arrangement of the phase modules represent 303-305 a first tap station and the parallel arrangement of the phase modules 315-317, a second tap station.
  • the DC terminals 302 and 314 are below ⁇ Kunststofflichem DC potential.
  • the transformer connection is preferably designed to be galvanically isolated. This can be achieved by a 3-winding transformer or by the use of individual transformers for both taps.
  • a tapping may be a tapping station. Also, a tapping station may have one or more taps.
  • the submodules are designed with half bridges.
  • the submodules can be designed as full bridge modules.
  • a reversing circuit can be omitted
  • the converter comprising the phase modules 303 to 305 and the converter with the phase modules 315 to 317 can be used redundantly; Accordingly, the falling voltage between the two converters (different) can be divided or adjusted.
  • Such a full bridge inverter can generate voltages in different polarities between zero and a maximum voltage.
  • the polarization of the voltages through the two inverters can be used to set a drawn or fed-in power.
  • the submodules in FIG. 3 are half-bridges, the polarization of the voltages through the two inverters can be used to set a drawn or fed-in power.
  • Half-bridge circuits of the inverter also be switched against each other so that the decoupled power is zero.
  • Such a half-bridge converter can generate voltages between a minimum and a maximum voltage; the polarity of the generated voltage results from the mounting direction of the half bridges.
  • the minimum voltage is determined by a rectified mains voltage.
  • the proposed solution allows (regardless of the game adhere at ⁇ realization according to Figure 3) an adjustment of different voltages (for example between networks).
  • an energy flow control or an energy exchange can be achieved.
  • the taps can act as a DC-DC converter and transfer energy between networks.
  • the inverter can be disabled and the power switch will be opened in this case. ⁇ the main current continues to flow, so the serial tap is bridged to protect the components from an overload.
  • One embodiment is to carry out the taps symmetrically and to insert in each case one subsystem in the positive pole and one subsystem in the negative pole of the HVDC route.
  • the taps according to FIG. 3 can be made relatively small for the extraction or coupling of services.
  • a first approximation can be - starting from a maximum permissible for the modules used RMS RMS and the DC operating current I dc the transmission - the DC voltage Ul (according to Figure 3: for the tap 1: Ul, for the tap 2: U2) of the taps and thus estimate their size as follows:
  • Voltage control of the inverters (ratio of amplitude AC phase-to-ground voltage to half DC voltage Ul) Despite the boundary condition of a restricted setting range for the voltages Ul and U2 and an impressed, uncontrollable transmission current (this must flow via the DC terminals of the two multilevel inverters ) results in no restriction of the decoupled power of the consumer network shown in Figure 3, since the DC side in the two partial converter on or applied power can always be compensated on the AC side.
  • Em advantage of the circuit according to Figure 3 is the low, adaptable to the output power output in the converters of the two taps.
  • the power converter does not have to be adapted to the voltage of the HVDC transmission with its series switching capacity.
  • the circuit can be executed not only with multilevel inverters but also with other inverter topologies.
  • the converters can be self-or network-controlled.
  • T1 electronic switch e.g., IGBT
  • AC grid AC mains
  • consumer network e.g. consumer network
  • phase module 303 series connection of several submodules 306 to 307 (also referred to as phase module)
  • phase module 305 series connection of several submodules 310 to 311 (also referred to as phase module)
  • phase module Series connection of several submodules 318 to 319 (also referred to as phase module)
  • phase module 316 series connection of several submodules 320 to 321 (also referred to as phase module)
  • phase module Series connection of several submodules 322 to 323 (also referred to as phase module)

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

Selon l'invention, un point de prise en série et en parallèle est prévu pour une section de transport de courant continu à haute tension (HGÜ) de manière à pouvoir fournir une puissance électrique le long d'une ligne HGÜ pour un réseau à courant alternatif ou de façon qu'une puissance électrique puisse être injectée dans la section HGÜ par le réseau à courant alternatif. De cette manière il est possible de prélever une puissance de la section HGÜ ou de l'injecter dans cette section avec souplesse. Une compensation de tension peut simultanément être effectuée. En particulier, il est possible d'injecter avec souplesse une composante longitudinale de tension favorable à la section HGÜ.
PCT/EP2012/061729 2012-06-19 2012-06-19 Transport de courant continu à haute tension comportant plusieurs prises WO2013189525A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2012/061729 WO2013189525A1 (fr) 2012-06-19 2012-06-19 Transport de courant continu à haute tension comportant plusieurs prises
EP12735221.9A EP2850713A1 (fr) 2012-06-19 2012-06-19 Transport de courant continu à haute tension comportant plusieurs prises

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/061729 WO2013189525A1 (fr) 2012-06-19 2012-06-19 Transport de courant continu à haute tension comportant plusieurs prises

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016112950A1 (fr) * 2015-01-12 2016-07-21 Siemens Aktiengesellschaft Procédé pour commander un flux de charge dans un réseau à tension continue
WO2017101963A1 (fr) * 2015-12-14 2017-06-22 Siemens Aktiengesellschaft Dispositif et procédé pour commander un flux de charge dans un réseau à tension alternative

Citations (6)

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WO2001052379A2 (fr) * 1999-12-23 2001-07-19 Abb Ab Ssteme d'energie electrique base sur des sources d'energie renouvelables
US20060282239A1 (en) * 2005-06-08 2006-12-14 Chang Gung University Method of setting-up steady state model of VSC-based multi-terminal HVDC transmission system
WO2010115453A1 (fr) 2009-04-06 2010-10-14 Abb Technology Ag Compensation de tension cc dans un réseau de distribution cc à haute tension à plusieurs terminaux
WO2012044369A1 (fr) * 2010-09-30 2012-04-05 Abb Research Ltd. Commande coordonnée de systèmes htcc à terminaux multiples

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DE1513827A1 (de) * 1966-02-26 1969-09-18 Siemens Ag Anordnung zur Beeinflussung der Stromverteilung in Hoechstspannungs-Gleichstromnetzen
DE19544777C1 (de) * 1995-11-30 1996-12-05 Siemens Ag Verfahren und Vorrichtung zur Regelung von Stromrichterstationen eines HGÜ-Mehrpunktnetzes
WO2001052379A2 (fr) * 1999-12-23 2001-07-19 Abb Ab Ssteme d'energie electrique base sur des sources d'energie renouvelables
US20060282239A1 (en) * 2005-06-08 2006-12-14 Chang Gung University Method of setting-up steady state model of VSC-based multi-terminal HVDC transmission system
WO2010115453A1 (fr) 2009-04-06 2010-10-14 Abb Technology Ag Compensation de tension cc dans un réseau de distribution cc à haute tension à plusieurs terminaux
WO2012044369A1 (fr) * 2010-09-30 2012-04-05 Abb Research Ltd. Commande coordonnée de systèmes htcc à terminaux multiples

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BAHRMAN M ET AL: "INTEGRATION OF SMALL TAPS INTO (EXISTING) HVDC LINKS", IEEE TRANSACTIONS ON POWER DELIVERY, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 10, no. 3, 1 July 1995 (1995-07-01), pages 1699 - 1706, XP000557367, ISSN: 0885-8977, DOI: 10.1109/61.400959 *
FLOURENTZOU N ET AL: "VSC-Based HVDC Power Transmission Systems: An Overview", IEEE TRANSACTIONS ON POWER ELECTRONICS, IEEE SERVICE CENTER, PISCATAWAY, NJ, US, vol. 24, no. 3, 1 March 2009 (2009-03-01), pages 592 - 602, XP011250706, ISSN: 0885-8993 *
JOVCIC ET AL: "Offshore wind farm with a series multiterminal CSI HVDC", ELECTRIC POWER SYSTEMS RESEARCH, ELSEVIER, AMSTERDAM, NL, vol. 78, no. 4, 20 February 2008 (2008-02-20), pages 747 - 755, XP022492360, ISSN: 0378-7796, DOI: 10.1016/J.EPSR.2007.05.023 *
KNUDSEN L ET AL: "DESCRIPTION AND PROSPECTIVE APPLICATIONS OF NEW MULTI-TERMINAL HVDC SYSTEM CONCEPTS", CIGRE CONF. INTERNATIONALE DES GRANDS RESEAUX ELECTRIQUES, XX, XX, 26 August 1990 (1990-08-26), pages 1 - 11, XP000770178 *
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016112950A1 (fr) * 2015-01-12 2016-07-21 Siemens Aktiengesellschaft Procédé pour commander un flux de charge dans un réseau à tension continue
WO2017101963A1 (fr) * 2015-12-14 2017-06-22 Siemens Aktiengesellschaft Dispositif et procédé pour commander un flux de charge dans un réseau à tension alternative
US10468884B2 (en) 2015-12-14 2019-11-05 Siemens Aktiengesellschaft Device and method for controlling a load flow in an alternating-voltage network

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