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WO2015059195A1 - Système d'onduleur et système pv - Google Patents

Système d'onduleur et système pv Download PDF

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Publication number
WO2015059195A1
WO2015059195A1 PCT/EP2014/072661 EP2014072661W WO2015059195A1 WO 2015059195 A1 WO2015059195 A1 WO 2015059195A1 EP 2014072661 W EP2014072661 W EP 2014072661W WO 2015059195 A1 WO2015059195 A1 WO 2015059195A1
Authority
WO
WIPO (PCT)
Prior art keywords
inverter
switching
arc
switching means
inverter unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2014/072661
Other languages
German (de)
English (en)
Inventor
Tobias Müller
Steffen Knapp
Christoph Kipphan
Heiko Fasshauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaco New Energy GmbH
Original Assignee
Kaco New Energy GmbH
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 Kaco New Energy GmbH filed Critical Kaco New Energy GmbH
Publication of WO2015059195A1 publication Critical patent/WO2015059195A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
    • H02H7/1222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters responsive to abnormalities in the input circuit, e.g. transients in the DC input
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Definitions

  • the invention relates to an inverter system having an inverter unit.
  • the inverter unit has a DC side for electrical connection to at least one photovoltaic (PV) generator and / or an electrical energy store and an AC side with at least one connection pole for electrical connection to a phase of an AC voltage network.
  • PV photovoltaic
  • Such inverter systems are preferably equipped with a safety device, which is referred to, for example, as an arc fault protection device, which interrupts a current flow in the event of an arc in a cabling on the DC side or in a photovoltaic generator and thereby extinguishes the arc.
  • a safety device which is referred to, for example, as an arc fault protection device, which interrupts a current flow in the event of an arc in a cabling on the DC side or in a photovoltaic generator and thereby extinguishes the arc.
  • the invention furthermore relates to a photovoltaic (PV) system which has a PV generator and / or an electrical energy store and a described inverter system.
  • PV photovoltaic
  • the invention relates to an inverter system, comprising: an inverter unit, comprising: a DC side for electrically connecting to at least one photovoltaic (PV) generator and / or an electrical energy store, and an AC side having at least one connection pole to electrical connection to a phase of an alternating voltage network, at least one controllable switching means having a switching contact which is connected or connected between the terminal pole of the inverter unit and the phase of the alternating voltage network and which has a closed and an open switching state, and an arc detection device for detecting a Arc, which is in operative connection with the switching means in such a way that the switching contact assumes the open switching state in a detected arc and thus separates the inverter unit from the phase or phases, whereby the arc extinguishes.
  • an inverter unit comprising: a DC side for electrically connecting to at least one photovoltaic (PV) generator and / or an electrical energy store, and an AC side having at least one connection pole to electrical connection to a
  • the inverter unit may have a plurality of terminal poles, each of which is assigned exactly one controllable switching means.
  • the inverter unit may have three connection poles, wherein correspondingly three switching means are provided. A respective switching contact of the switching means is looped or connected for this case between an associated terminal pole and an associated phase of a rotary power network.
  • inverter system can be used more cost-effective and easier-to-use components than in embodiments according to the prior art, which have, for example on the DC side an arc fault protection device with DC side separation.
  • This is due in particular to the fact that components which enable separation or switching on the AC side are significantly cheaper than corresponding components which enable separation or switching on the DC side.
  • the use of lossy semiconductor switches can be dispensed with. According to the feed-in function of the inverter unit is terminated by the separation or the (Ab-) switching on the AC side of the inverter unit and thus a power consumption on the DC side interrupted. This leads to a reliable extinction of the arc.
  • the inverter unit is typically configured to convert a DC voltage supplied on the DC side to an AC voltage to be output on the AC side. It can also be a transformation of the voltage to a lower or higher voltage.
  • the AC voltage network can be, for example, a typical public three-phase power grid or else an island power supply.
  • An island power Supply may, for example, be used to supply a localized area not connected to supraregional power grids, for example a mountain lodge or a remote area in a less developed country.
  • the switching means may preferably be a circuit breaker or a circuit breaker. Such switching means enable switching under load.
  • the switching means may be a bistable relay. This has in comparison to monostable relays or other monostable switching means in particular the advantage that neither of the two switching states requires a permanent current flow to its maintenance.
  • the bistable relay can also be designed as a circuit breaker or circuit breaker, so that the advantages described in the preceding paragraph are additionally achieved.
  • the design of the switching means as a bistable relay, in particular on the AC side of the inverter unit, is an independent idea which can be carried out independently of the other features described. This idea can also be combined with any other features described herein.
  • the arc detection device can be embodied, for example, by means of a camera, a voltmeter, a temperature sensor or otherwise. Preferably, it is associated with the DC side of the inverter unit. For example, it may be associated with a switch, wiring or other electrical component on the DC side.
  • the arc detection device can measure and evaluate both a voltage profile and a current profile over time.
  • the current profile has arcing characteristic, high-frequency components.
  • a current may be below a tripping limit of circuit breakers.
  • an operative connection can be understood both a direct and an indirect connection or coupling between the arc detection device and the switching means, which leads to the fact that the switching contact occupies the open switching state in a detected arc.
  • a direct control line may be present in the case of an immediate connection.
  • an output signal of the arc detection device can initially be assigned to a control device. leads, which in turn controls the switching means. This allows additional functions to be implemented.
  • the inverter system comprises a photovoltaic inverter, wherein the inverter unit, the switching means and the arc detection device are integrated in the photovoltaic switch.
  • the inverter system has a separate from the inverter unit switching device, wherein the switching means and the arc detection device are integrated into the switching device. This allows a separate arrangement of the inverter unit relative to the switching means and the arc detection device. This allows the use of the invention even with conventional inverters.
  • the invention further relates to a photovoltaic (PV) system, comprising: a photovoltaic (PV) generator and / or an electrical energy storage, and an inventive inverter system, wherein the DC side of the inverter unit with the PV Generator and / or the energy store is electrically connected.
  • PV photovoltaic
  • the PV generator can be, for example, a photovoltaic module or an arrangement of a plurality of photovoltaic modules.
  • the electrical energy store may be, for example, a battery, a rechargeable battery, an accumulator, a fuel cell or another suitable energy store.
  • the PV system according to the invention makes it possible to realize the advantages described with respect to the inverter system according to the invention for a complete PV system which can be used, for example, for feeding into a public grid and / or establishing a stand-alone power supply.
  • Fig. 1 a first embodiment of a PV system and 2 shows a second embodiment of a PV system.
  • Fig. 1 shows a photovoltaic (PV) system 1 according to a first embodiment.
  • the PV system 1 has a PV generator 3 and a photovoltaic (PV) inverter 7, which more an inverter unit 2, an arc detection device 6 and a switching means 5 having a switching contact 5a. These components are housed in a housing of the PV inverter 7.
  • the PV inverter 7 forms an inverter system according to the invention.
  • the inverter unit 2 is electrically coupled on the DC side to the PV generator 3, which in the present case is designed as an arrangement of photovoltaic modules.
  • the arc detection device 6 is associated with wiring between the PV generator 3 and the inverter unit 2.
  • the arc detection device 6 may for example be electrically connected or connected between the PV generator 3 and a DC side of the inverter unit 2.
  • an arc on the DC side can be detected.
  • the inverter unit 2 is further electrically coupled on the AC side via the switching contact 5a with a phase 4 of an AC voltage network.
  • the switching contact 5a is looped or connected between a connection pole 2a of the inverter unit 2 and the phase 4 of the alternating voltage network.
  • the switching means 5 has an open switching state with open switching contact 5a and a closed switching state when the switching contact 5a is closed.
  • an electrical connection between the inverter unit 2 or its connection pole 2 a and the phase 4 of the alternating voltage network is achieved, which makes it possible to feed electrical energy into the alternating voltage network. It is also possible to interrupt by switching the switching contact 5a in its open switching state, this feed.
  • the switching means 5 is in operative connection with the arc detection device 6, so that upon detection of an arc by the arc detection device 6, the switching contact 5a is set in its open switching state.
  • a control signal from the arc detection device 6 via a control line, not shown, to a control input, not shown, of the switching means 5 are transmitted.
  • a central control device in the form of a microprocessor or digital signal processor may be provided which, for example, controls the operation of the alternating judge unit 2 and the switching state of the switching means 5 controls or regulates.
  • the arc detection device 6 can supply a detection signal to the control device, wherein the control unit controls the switching means 5 in response to the detection signal, in particular in a detected arc in the open switching state.
  • an effective AC-side separation can be achieved, in which case the result is a DC side detected arc is deleted, since the system is then no longer under load.
  • the switching means 5 is presently designed as a circuit breaker and is therefore suitable for switching under load.
  • FIG. 2 shows an embodiment of a PV system 1 modified in comparison to that of FIG. 1.
  • a separate switching device 8 is provided, which includes both the arc detection device 6 as well as the switching means 5 with its switching contact 5a in a housing.
  • further phases for example two further phases, may be present, which are correspondingly electrically connected to further output terminals of the inverter 2 via further controllable switching means.
  • a detected arc at least one of the switching means is opened.
  • at least one of the switching means remains closed in order to maintain a supply of the inverter 2 with electrical energy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

L'invention concerne un système d'onduleur (7) dans lequel une unité d'onduleur (2) est séparée du côté alternatif lors de la détection d'un arc électrique par un moyen de détection d'arc électrique (6).
PCT/EP2014/072661 2013-10-22 2014-10-22 Système d'onduleur et système pv Ceased WO2015059195A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310221446 DE102013221446A1 (de) 2013-10-22 2013-10-22 Wechselrichter-System und PV-System
DE102013221446.4 2013-10-22

Publications (1)

Publication Number Publication Date
WO2015059195A1 true WO2015059195A1 (fr) 2015-04-30

Family

ID=51830290

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/072661 Ceased WO2015059195A1 (fr) 2013-10-22 2014-10-22 Système d'onduleur et système pv

Country Status (2)

Country Link
DE (1) DE102013221446A1 (fr)
WO (1) WO2015059195A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020099116A1 (fr) * 2018-11-12 2020-05-22 Kaco New Energy Gmbh Onduleur
US10757485B2 (en) 2017-08-25 2020-08-25 Honda Motor Co., Ltd. System and method for synchronized vehicle sensor data acquisition processing using vehicular communication
US11163317B2 (en) 2018-07-31 2021-11-02 Honda Motor Co., Ltd. System and method for shared autonomy through cooperative sensing
US11181929B2 (en) 2018-07-31 2021-11-23 Honda Motor Co., Ltd. System and method for shared autonomy through cooperative sensing
CN113938039A (zh) * 2021-09-09 2022-01-14 华为数字能源技术有限公司 一种光伏系统、逆变器及直流电弧检测的方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016218219A1 (de) * 2016-09-22 2018-03-22 Siemens Aktiengesellschaft DC-Überspannungsschutz für ein Energiespeichersystem
CN109698493A (zh) * 2017-10-20 2019-04-30 浙江昱能科技有限公司 一种安全保护光伏系统的方法及系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070258179A1 (en) * 2006-05-02 2007-11-08 Yoon Seong-Hee Power supply device having surge protection function
WO2010136257A1 (fr) * 2009-05-26 2010-12-02 Sma Solar Technology Ag Protection contre les surtensions d'onduleurs dotés d'un filtre emv d'entrée
WO2012103936A1 (fr) * 2011-02-01 2012-08-09 Siemens Aktiengesellschaft Procédé visant à éliminer une défaillance sur une ligne de courant continu haute tension, installation permettant de transporter un courant électrique sur une ligne de courant continu haute tension, et convertisseur correspondant
WO2013083414A2 (fr) * 2011-12-05 2013-06-13 Abb Technology Ag Procédé d'élimination d'un arc électrique généré par au moins une source de tension simple d'un circuit onduleur

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010017747A1 (de) * 2010-05-03 2011-11-03 Sma Solar Technology Ag Verfahren zur Begrenzung der Generatorspannung einer photovoltaischen Anlage im Gefahrenfall und photovoltaische Anlage
DE102012203006A1 (de) * 2012-02-28 2013-08-29 Kaco New Energy Gmbh PV-Wechselrichter, NA-Schutz und PV-System

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070258179A1 (en) * 2006-05-02 2007-11-08 Yoon Seong-Hee Power supply device having surge protection function
WO2010136257A1 (fr) * 2009-05-26 2010-12-02 Sma Solar Technology Ag Protection contre les surtensions d'onduleurs dotés d'un filtre emv d'entrée
WO2012103936A1 (fr) * 2011-02-01 2012-08-09 Siemens Aktiengesellschaft Procédé visant à éliminer une défaillance sur une ligne de courant continu haute tension, installation permettant de transporter un courant électrique sur une ligne de courant continu haute tension, et convertisseur correspondant
WO2013083414A2 (fr) * 2011-12-05 2013-06-13 Abb Technology Ag Procédé d'élimination d'un arc électrique généré par au moins une source de tension simple d'un circuit onduleur

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10757485B2 (en) 2017-08-25 2020-08-25 Honda Motor Co., Ltd. System and method for synchronized vehicle sensor data acquisition processing using vehicular communication
US11163317B2 (en) 2018-07-31 2021-11-02 Honda Motor Co., Ltd. System and method for shared autonomy through cooperative sensing
US11181929B2 (en) 2018-07-31 2021-11-23 Honda Motor Co., Ltd. System and method for shared autonomy through cooperative sensing
WO2020099116A1 (fr) * 2018-11-12 2020-05-22 Kaco New Energy Gmbh Onduleur
US11973418B2 (en) 2018-11-12 2024-04-30 Kaco New Energy Gmbh Inverter to be connected to or disconnected from a grid
CN113938039A (zh) * 2021-09-09 2022-01-14 华为数字能源技术有限公司 一种光伏系统、逆变器及直流电弧检测的方法

Also Published As

Publication number Publication date
DE102013221446A1 (de) 2015-04-23

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