WO2010000315A1 - Système convertisseur modulaire supportant une suppression d'harmoniques - Google Patents

Système convertisseur modulaire supportant une suppression d'harmoniques Download PDF

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Publication number
WO2010000315A1
WO2010000315A1 PCT/EP2008/058508 EP2008058508W WO2010000315A1 WO 2010000315 A1 WO2010000315 A1 WO 2010000315A1 EP 2008058508 W EP2008058508 W EP 2008058508W WO 2010000315 A1 WO2010000315 A1 WO 2010000315A1
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WIPO (PCT)
Prior art keywords
power
power converter
converter
modules
module
Prior art date
Application number
PCT/EP2008/058508
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English (en)
Inventor
Heng DENG
Yin BO
Tie Ling Zhang
Original Assignee
Vestas Wind Systems A/S
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 Vestas Wind Systems A/S filed Critical Vestas Wind Systems A/S
Priority to PCT/EP2008/058508 priority Critical patent/WO2010000315A1/fr
Publication of WO2010000315A1 publication Critical patent/WO2010000315A1/fr

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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
    • 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
    • H02M5/453—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 triode or transistor type requiring continuous application of a control signal
    • H02M5/458—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements

Definitions

  • the present invention relates to a modular converter system comprising a plurality of interchangeable power converter modules forming a reliable, scalable and redundant converter system.
  • the present invention relates to a modular converter system comprising at least one converter module being capable of suppressing harmonics, such as grid harmonics, harmonics generated by a converter or other system harmonics.
  • the present invention further relates to various devices applying such electronic converter system.
  • a rectifier module can only be operated as a rectifier.
  • a rectifier module can not replace an inverter module and vice versa. It is an object of the present invention to provide a scalable power converter system offering harmonic suppression and full flexibility in terms of replacing one power converter module with another power converter module within the power converter system.
  • the electronic converter system according to the present invention is directed towards a modular converter system that is well suited (but not limited to) large power systems.
  • One field of application may be wind turbines, but many other systems could benefit from the solution suggested by the present invention.
  • an electronic converter system comprising a plurality of electronic converter modules operatively connected to a DC intermediate circuit, the electronic converter system comprising
  • a second power converter module also being operable in the plurality of modes of operation, wherein both the first and second electronic converter modules are operable in identical modes of operation thereby forming a pair of interchangeable electronic converter modules if so required.
  • the power converter modules are interchangeable thereby providing a flexible, fully redundant and reliable electronic converter system.
  • fully redundancy requires at least three power converter modules.
  • the electronic converter system according to the present invention is a scalable system in that the number of power converter modules may be adjusted to match for example the amount of power or current to be delivered.
  • converter systems in the MW range may be provided as easily as converter systems in the kW range just by varying the number of power converter modules incorporated into the converter system.
  • the power converter modules are capable of covering the same functionalities of the converter system.
  • the power converter modules become interchangeable and may thus replace each other.
  • a given converter module for example an AC/DC converter module
  • breaks down another converter module in the system may immediately be appointed an AC/DC converter module in replacement of the previous AC/DC converter module which may be repaired or physically replaced by another converter module.
  • the first aspect of the present invention provides a fully redundant converter system.
  • the DC intermediate circuit may be implemented as a DC capacitor bank in a bus bar configuration, or as simple interconnection structure. Also overcurrent protective devices may be present in the DC intermediate circuit to limit fault propagation.
  • the DC intermediate circuit may physically extend the boundary of the structure with the purpose of connecting more similar structures.
  • the electronic converter system according to the first aspect of the present invention may be used in connection with various applications.
  • the converter systems according to the first aspect of the present invention may be applied as part of frequency converters for individual wind turbines or frequency converters for wind power plants. Since the converter system according to the present invention may also be configured as a DC/DC converter, other applications may also be applicable.
  • a first mode of operation may involve operating the first power converter module as a AC/DC converter.
  • a second mode of operation may involve operating the second power converter module as a DC/ AC converter.
  • both the first and the second power converter modules are operated as DC/DC converters.
  • the electronic converter system may further comprise one or more additional power converter modules also being operable in the plurality of modes of operation, the one or more additional power converter modules being operatively connected to the DC intermediate circuit.
  • At least two power converter modules there are at least two power converter modules. Each of them comprises a four quadrant power converter thereby allowing power conversion from AC to DC in a first mode of operation, and power conversion from DC to AC in a second mode of operation.
  • Controllable switching means shall be provided in each of the power converter modules, said controllable switching means being adapted to control a power flow to and/or from each of the power converter modules. Thus, by operating the controllable switching means appropriately it may be controlled whether an individual converter module should provide power to the DC intermediate circuit or draw power from the DC intermediate circuit.
  • the electronic converter system may further comprise an input filter for filtering input power signals to the electronic converter system.
  • the electronic converter system may further comprise an output filter for filtering power signals leaving the electronic converter system.
  • Each of the power converter modules may comprise control means adapted to communicate with a higher level central control module of the converter system.
  • the present invention relates to a power generating facility comprising means for generating AC power and an electronic converter system according to the first aspect of the present invention.
  • the present invention relates to a wind turbine comprising generator means for generating AC power, and an electronic converter system according to the first aspect of the present invention.
  • the present invention relates to a wind power plant comprising a plurality of generator means for generating AC power, and an electronic converter system according to the first aspect of the present invention.
  • the electronic converter systems according to the second, third and fourth aspects of the present invention may be implemented and configured by following the design routes mentioned in connection with the first aspect of the present invention.
  • the present invention relates to an electronic converter system comprising a plurality of power converter modules operatively connected to a DC intermediate circuit, the electronic converter system comprising
  • first and second power converter modules are operable in identical modes of operation thereby forming a pair of interchangeable power converter modules, and wherein the third power converter module, in one of its modes of operation, is adapted to suppress system and/or grid harmonics.
  • the third power converter module may be regarded as a power quality module in that it improves the quality of the delivered electric power.
  • the third power converter module will in the following description be denoted both as a power quality module and a third power converter module.
  • the first and second power converter modules are interchangeable thereby providing a flexible, fully redundant and reliable electronic converter system.
  • the electronic converter system according to the present invention is a scalable system in that the number of power converter modules may be adjusted to match for example the amount of power or current to be delivered.
  • converter systems in the MW range may be provided as easily as converter systems in the kW range just by varying the number of power converter modules incorporated into the converter system.
  • the third power converter module in one of its modes of operation, is adapted to suppress system and/or grid harmonics.
  • a number of the power converter modules are capable of covering the same functionalities of the converter system.
  • a number of the power converter modules become interchangeable and may thus replace each other.
  • another converter module in the system may immediately be appointed an AC/DC converter module in replacement of the previous AC/DC converter module which may be repaired or physically replaced by another converter module.
  • the present invention provides a fully redundant converter system.
  • the DC intermediate circuit may be implemented as a DC capacitor bank in a bus bar configuration, or as simple interconnection structure. Also overcurrent protective devices may be present in the DC intermediate circuit to limit fault propagation.
  • the DC intermediate circuit may physically extend the boundary of the structure with the purpose of connecting more similar structures.
  • the electronic converter system according to the fifth aspect of the present invention may be used in connection with various applications.
  • the converter systems according to the present invention may be applied as part of frequency converters for individual wind turbines or frequency converters for wind power plants. Since the converter system according to the present invention may also be configured as a DC/DC converter, other applications may also be applicable.
  • the first, second and third power converter modules may, in a first mode of operation, be adapted to be operated as AC/DC converter modules. Similarly, the first, second and third power converter modules may, in a second mode of operation, be adapted to be operated as DC/AC converter modules.
  • the third power converter module may be adapted to suppress harmonics generated by a power converter module, such as to suppress harmonics being generated by the second power converter module when said second power converter module is being operated as a DC/AC converter module.
  • the third power converter module may be operated as a DC/ AC converter module in parallel with the second power converter module.
  • the third power converter module may be adapted to suppress grid harmonics and/or other electrical system disturbances, such as higher order harmonics in the current supplied to the electrical grid.
  • These current harmonics can originate from nonlinearities in the converter control system, low switching frequency of first/second power converter modules or higher order harmonics in the grid voltage.
  • the third power converter module may be adapted to suppress harmonics generated by said generator of the wind turbine.
  • Additional power converter module(s) being operable as AC/DC or DC/ AC converter modules may be provided.
  • the additional power converter module(s) may be operatively connected to the DC intermediate circuit.
  • Controllable switching means shall be provided in each of the power converter modules, said controllable switching means being adapted to control a power flow to and/or from each of the power converter modules.
  • the controllable switching means may comprise IGBTs or other suitable switching means.
  • the controllable switching means of the third power converter module are modulated with a frequency being significantly higher than the switching frequency of other power converter modules.
  • the switching frequency of the third power converter module may be within the range 10-30 kHz whereas the switching frequency of the other power converter modules may be within the range 1-5 kHz.
  • the third power converter module may deliver less power compared to the other power converter modules due to the higher switching frequency.
  • the third power converter module may be operated in a derated power mode.
  • the third power converter module may be designed to operate with the significantly higher switching frequency
  • the third power converter module may be a standard module like the first and second power modules. However, when operated with the significantly higher switching frequency, the power rating of the third power module is reduced.
  • Input filter means for filtering input power signals to the electronic converter system may be provided.
  • a first low-pass filter for filtering power signals leaving at least part of the electronic converter system may be provided. By at least part is meant any power converter module(s) except the third power converter module.
  • a second filter for filtering power signals leaving the third power converter module may be provided. Due to the higher switching frequency of the third power converter module the second filter, in case it is a low-pass filter, may have a higher cut-off frequency than the first low-pass filter.
  • the cut-off frequency of the first low-pass should match the switching frequency of the power converter modules other than the third power converter module.
  • the cut-off frequency of the first low-pass filter may be around 2 kHz, for a switching frequency of 2.5 kHz.
  • the second filter is a low-pass filter with very high cut-off frequency so that a wide range of harmonics can be compensated.
  • Each of the power converter modules may comprise control means adapted to communicate with a central control means of the system.
  • the present invention relates to a power generating facility comprising means for generating AC-power, said means for generating AC- power being operationally connected to an electronic converter system according to the first aspect of the present invention.
  • the present invention relates to a wind turbine comprising a generator for generating AC-power, said generator being operationally connected to an electronic converter system according to the first aspect of the present invention.
  • the wind turbine according to the seventh aspect may form part of a wind power plant comprising a plurality of such wind turbines.
  • the present invention relates to a method for operating an electronic converter system comprising a plurality of power converter modules operationally connected to a DC intermediate circuit, the method comprising the steps of
  • the third power converter module may be operated in a manner so that it suppresses harmonics generated by the second power converter module, grid harmonics and/or other system disturbances.
  • the third power converter may be operated in a manner so that it suppresses harmonics generated by a wind turbine generator.
  • the latter scenario typically implies that the third power converter module is operated as an AC/DC converter.
  • a low-pass filter for low-pass filtering power signals leaving the second power converter module may be provided.
  • a filter for filtering power signals leaving the third power converter module may be provided, said filter having, in case it is a low-pass filter, a higher cut-off frequency than the first low-pass filter.
  • Said filter may, alternatively, be a band-pass filter for band-pass filtering power signals leaving the third power converter module.
  • the band-pass filter may have a centre frequency in the range 1-8 kHz.
  • Each of the power converter modules may comprise control means adapted to communicate with a central control means of the system.
  • the power converter modules of the eighth aspect of the present invention may generally be implemented by following the same design route as set forth in connection with the seventh aspect of the present invention.
  • Fig. 1 shows a full scale modular power converter system according to the present invention
  • Fig. 2 shows a three-phase power module with IGBT's.
  • the present invention relates to a modular power converter system where a plurality of interchangeable power converter modules, such as AC/DC converters, DC/ AC converters, DC/DC converters, or a combination thereof are connected to a common DC intermediate circuit, such as a DC capacitor bank, and wherein at least one power converter module is operable in a manner which allows suppression of system and/or grid harmonics.
  • Interchangeable means that a number of the power converter modules can replace each other in terms of functionality.
  • a given converter module is operated as for example an AC/DC converter and this converter breaks down another converter can immediately be appointed AC/DC converter in order to take over from the broken down converter.
  • the converter system according to the present invention provides a fully redundant and very reliable converter system.
  • the power converter modules of the present invention may all be operated in a plurality of modes.
  • the power converter modules of the present invention are four quadrant semiconductor- based power converter modules since this type of power converter modules offer a high degree of flexibility.
  • the active semiconductor components may be, but is not limited to, thyristors, IGCTs, GTOs, BJTs, mosFETs or IGBTs arranged in for example traditional three phase rectifier, converter or inverter bridge configurations.
  • a traditional three-phase DC/AC converter bridge configuration applying six IGBTs is shown in Fig. 2.
  • the DC intermediate circuit is represented by U DC whereas the AC three-phases are denoted A, B and C.
  • the present invention is not limited to three-phase systems.
  • the present invention is in general applicable to all single or multiphase systems.
  • the system is scalable simply by varying the number of power converter modules constituting the converter system.
  • a relatively large number of power modules could be required.
  • a significantly smaller number of power modules could be required.
  • the number of power converter modules in a given situation depends on the power handling capabilities of the chosen modules. Thus, the larger the modules the fewer modules are required.
  • Fig. 1 shows a wind turbine or wind turbine plant implemented version power converter system according to the present invention.
  • the present invention is by no means limited to wind turbine or wind power plant applications.
  • Fig. 1 depicts a drive train and a generator of a wind turbine. Moreover, a grid transformer and an associated power supply grid is depicted. Typically, the wind turbine generator, the grid transformer and the associated power supply grid are operated as three-phase AC elements.
  • the drive train of the wind turbine involves the shaft to which the rotor blades are attached, the shaft to which the rotor of the generator is attached, and optionally a gear box inserted between the two shafts.
  • Fig. 1 shows power converter modules capable of converting between AC and DC using appropriate semiconductors components, such as thyristors, IGCTs, GTOs, BJTs, mosFETs or IGBTs.
  • the power converter modules are all connected to a DC intermediate circuit and appropriate filters are provided at the output of the power converter system.
  • appropriate filter or filters may be provided at the input of the power converter system.
  • the DC-interfaces of the ⁇ n" power converter modules are all connected to the DC intermediate circuit - in Fig. 1 denoted DC link infrastructure.
  • a high level control module provides control signals to each of the "n” power converter modules.
  • the high level controller gives each "n” power converter module a command defining its operating state.
  • Each of the "n” power converter modules is equipped with a local controller.
  • the software of the controller of the power quality module shall include the same functions for power conversion from the generator to power grid as the other power converter modules.
  • functions relating to harmonic current detection, harmonic current compensation and reactive power compensation shall be included. Control schemes for controlling active power filters and STATCOMs are very mature, but they may optionally be used in the power quality module.
  • each of the "n" power converter modules are preferably a four quadrant semiconductor-based power converter module.
  • the upper transfer switch for each power converter module is adapted to provide AC power to the module when said module is operated as an AC/DC converter
  • the lower transfer switch for each converter module is adapted to lead AC power away from the power converter module when said converter module is operated as an DC/ AC converter.
  • the controllable transfer switches may be activated/deactivated accordingly.
  • the converter system is a fully redundant system where the mode of operation of each of the "n" power converter modules can be varied in order to fulfil specific demands.
  • a specific power converter module being operated as an AC/DC converter may be appointed to be operated as a DC/AC converter if demands so require.
  • a converter module suddenly fails or breaks down the redundancy of the system ensures that another converter module immediately takes over the functionality of the faulty converter module thereby ensuring a reliable power delivery.
  • the converter module taking over could be a spare converter module or it could be a converter module being operated in another mode of operation.
  • a converter module operating in AC/DC mode breaks down it could be replaced by a module operating in either AC/DC or DC/AC mode, or even a spare converter module. This selection depends on the required power and the available modules.
  • the power quality module is electrically coupled to the DC intermediate circuit.
  • the overall functionality shall include the following modes of operation:
  • the power quality module shall serve as either a grid-side power converter or a generator-side power converter like other normal power modules in order to transfer real power from the generator to the power supply grid when the power capacity of the other modules is insufficient.
  • normal power modules have higher priority to transfer real power from the generator to the grid compared to the power quality module except in the case where a normal power module is not functioning properly.
  • the power quality module shall connect to an output filter (denoted 2 nd output filter in Fig. 1) and serve as an active power filter and STATCOM for harmonic current and reactive power compensation.
  • the power quality module could possibly supply reactive power for grid voltage support.
  • the power quality module is adapted to be operated with a significantly higher switching frequency than the remaining power converter modules. This allows that the power quality module may be operated in a manner which allows that grid and/or system harmonics can be effectively suppressed.
  • the power quality module is typically a four quadrant semiconductor-based converter. This implies that the power quality module can be operated as an AC/DC or a DC/ AC converter. In case the power quality converter is operated as an AC/DC converter, the operation of the power quality converter can be optimized to suppress harmonics generated by the wind turbine generator. In case the power quality converter is operated as a DC/AC converter, the operation of the power quality converter can be optimized to suppress grid harmonics or other system disturbances, such as higher order harmonics in the current supplied to the electrical grid. These current harmonics can originate from nonlinearities in the converter control system or higher order harmonics in the grid voltage.
  • the power quality module is operated with a switching frequency within the range 10-30 kHz.
  • the other power converter modules of the system are typically operated with a switching frequency within the range 1-5 kHz.
  • appropriate output filters are arranged at the output port of the converter system. As depicted in Fig. 1, the output filters is connected to a grid transformer, said grid transformer being adapted to match the output voltage level of the converter system with the voltage of an associated power grid.
  • the output filters are both connected to the AC sides of the converter system.
  • the output filter denoted 2 nd output filter in Fig. 1 is connectable to the power quality filter.
  • This filter may be implemented in various ways, such as a low-pass filter or a band-pass filter. If this filter is implemented as a low-pass filter its cut-off frequency will be higher than the cut-off frequency of the low-pass filter connected to the other power converter modules. If the design of the low-pass output filter can be compromised or only low-order harmonic current needs to be compensated, it is possible to share the same output filter.
  • the output filters may each comprise a high-pass and a low-pass filter part.
  • the high-pass filter part may comprise EMC-filters and/or dv/dt filters whereas the low-pass filter part may comprise switch harmonic filters.
  • the power converter modules can be cooled by various means. In one embodiment, liquid cooling can be used. The cooling liquid for all power converter modules can circulate in a shared cooling system or in a system that is divided into two or more liquid systems.
  • each of the individual power converter modules may have their own cooling system including a pump for circulating a cooling liquid for each converter module.
  • the redundancy of the system also includes the cooling arrangement.
  • Each converter module may include a complete cooling system, where part of the cooling system is placed in an suitable environment for dissipating the heat (i.e. outdoor)
  • additional modules such as means for obtaining advanced grid operations (AGOs), dump resistors, means for static VAr compensation, batteries or other energy storage means for power backup may be connected to the DC intermediate circuit.
  • AGOs advanced grid operations
  • dump resistors means for static VAr compensation
  • batteries or other energy storage means for power backup may be connected to the DC intermediate circuit.
  • the functionality of a faulty converter module may be taken over by another converter module.
  • the switching between converter modules is done on the fly, i.e. without interruption, in order to avoid short shut-down periods.
  • the generator of the wind turbine may be of various types, including a full scale solution as depicted in Fig. 1 or a doubly fed generator arrangement.
  • the only difference between the doubly fed configuration and the full scale solution of Fig. 1 is a third transformer winding of the grid transformer and its connection to the wind turbine generator.
  • the flexibility of the power converter system shown in Fig. 1 is evident.
  • a plurality of converter modules are connected to the input side of the converter system, and thus operated as AC/DC rectifiers.
  • a plurality of converter modules are connected to the output of the converter system, and thus operated as DC/ AC inverters.
  • the power quality module can be operated as an AC/DC rectifier or a DC/AC inverter depending of the harmonics to be suppresses.
  • the centre transfer switch is closed and the power quality filter feeds the upper output filter along with other DC/AC inverters.
  • the lower transfer switch is closed and the power quality filter feeds the lower output filter, i.e. the 2 nd output filter.
  • the following adjustments to the converter system configuration may typically occur:
  • a redundant module may take over its functionality, and the converter may request Converter Module replacement at the next service (alternatively accept reduced performance until next service).
  • modules could be transferred from the generator side to the output, maximizing the capability of the system as a whole.
  • modules could be transferred from the input to the output to help provide the current needed to activate available overcurrent protective devices.
  • the converter system may be configured to ensure that the converter modules experience an essentially equal load profile over their life.
  • converter modules can be transferred from either the input side (AC/DC) or the output side (DC/ AC) of the converter system to an AGO dump resistor.
  • a full rated AGO functionality could be established if the output converter modules (DC/AC) are transferred to AGO functionalities in case of a power grid failure. This ensures that the full load on the mechanical system of a wind turbine may be maintained. When the power grid failure is no longer present, the converter modules being operated to provide AGO functionalities are transferred to output converter modules (DC/ AC). To ensure a smooth transfer, the converter modules are transferred one at a time thereby enabling a fast reconnect of the wind turbine to the power grid. Pitch systems and the rest of the mechanical system of the wind turbine remain unaffected by the power grid dropout.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

La présente invention porte sur un système convertisseur de puissance électronique comprenant une pluralité de modules convertisseurs de puissance fonctionnellement connectés à un circuit intermédiaire en courant continu (CC), le système convertisseur électronique comprenant des premier et deuxième modules convertisseurs de puissance utilisables dans la même pluralité de modes de fonctionnement. Le système convertisseur électronique comprend en outre un troisième module convertisseur de puissance utilisable dans une pluralité de modes de fonctionnement, l'un desdits modes de fonctionnement concernant la suppression d'harmoniques du système et/ou du réseau. Les premier et deuxième modules convertisseurs de puissance sont utilisables dans des modes de fonctionnement identiques, formant ainsi une paire de modules convertisseurs de puissance interchangeables.
PCT/EP2008/058508 2008-07-02 2008-07-02 Système convertisseur modulaire supportant une suppression d'harmoniques WO2010000315A1 (fr)

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Cited By (7)

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WO2012003835A1 (fr) * 2010-07-09 2012-01-12 Vestas Wind Systems A/S Configuration d'alimentation électrique d'appareillage de commutation haute tension pour une installation de turbine éolienne
US8558409B2 (en) 2010-07-09 2013-10-15 Vestas Wind Systems A/S High voltage switchgear power supply arrangement for a wind turbine facility
JP2014127846A (ja) * 2012-12-26 2014-07-07 Mitsubishi Pencil Co Ltd 炭素質音響振動板とその製造方法
WO2015041881A1 (fr) * 2013-09-19 2015-03-26 Gridco, Inc. Système de qualité d'alimentation modulaire, évolutif et mutifonctionnel pour réseaux utilitaires
WO2015043600A1 (fr) * 2013-09-26 2015-04-02 Vestas Wind Systems A/S Système de conversion de puissance à flux de puissance re-configurable
US10153707B2 (en) 2015-04-10 2018-12-11 Epc Power Corporation Reconfigurable power converter
US12097768B2 (en) 2022-12-01 2024-09-24 Mercedes-Benz Group AG Configurable power inverter

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WO2012003835A1 (fr) * 2010-07-09 2012-01-12 Vestas Wind Systems A/S Configuration d'alimentation électrique d'appareillage de commutation haute tension pour une installation de turbine éolienne
US8558409B2 (en) 2010-07-09 2013-10-15 Vestas Wind Systems A/S High voltage switchgear power supply arrangement for a wind turbine facility
JP2014127846A (ja) * 2012-12-26 2014-07-07 Mitsubishi Pencil Co Ltd 炭素質音響振動板とその製造方法
WO2015041881A1 (fr) * 2013-09-19 2015-03-26 Gridco, Inc. Système de qualité d'alimentation modulaire, évolutif et mutifonctionnel pour réseaux utilitaires
US9795048B2 (en) 2013-09-19 2017-10-17 Gridco Inc. Modular, scalable, multi-function, power quality system for utility networks
WO2015043600A1 (fr) * 2013-09-26 2015-04-02 Vestas Wind Systems A/S Système de conversion de puissance à flux de puissance re-configurable
CN105594087A (zh) * 2013-09-26 2016-05-18 维斯塔斯风力系统集团公司 具有可重新配置的功率流的功率转换系统
US9742303B2 (en) 2013-09-26 2017-08-22 Vestas Wind Systems A/S Power conversion system with re-configurable power flow
US10153707B2 (en) 2015-04-10 2018-12-11 Epc Power Corporation Reconfigurable power converter
US10756642B2 (en) 2015-04-10 2020-08-25 Epc Power Corporation Reconfigurable power converter
US12097768B2 (en) 2022-12-01 2024-09-24 Mercedes-Benz Group AG Configurable power inverter

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