WO2014161828A1 - Onduleur et module d'alimentation en courant continu pour onduleur - Google Patents

Onduleur et module d'alimentation en courant continu pour onduleur Download PDF

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Publication number
WO2014161828A1
WO2014161828A1 PCT/EP2014/056487 EP2014056487W WO2014161828A1 WO 2014161828 A1 WO2014161828 A1 WO 2014161828A1 EP 2014056487 W EP2014056487 W EP 2014056487W WO 2014161828 A1 WO2014161828 A1 WO 2014161828A1
Authority
WO
WIPO (PCT)
Prior art keywords
inverter
connection unit
connection
direct
disconnect switch
Prior art date
Application number
PCT/EP2014/056487
Other languages
German (de)
English (en)
Inventor
Lars Cramer
Jens Dittmar
Lutz HERMANNS
Martin PUTZ
Harald Drangmeister
Original Assignee
Sma Solar Technology Ag
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 Sma Solar Technology Ag filed Critical Sma Solar Technology Ag
Priority to CN201490000459.5U priority Critical patent/CN205141304U/zh
Publication of WO2014161828A1 publication Critical patent/WO2014161828A1/fr

Links

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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/60—Means for supporting coupling part when not engaged
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/707—Structural association with built-in electrical component with built-in switch interlocked with contact members or counterpart
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R27/00—Coupling parts adapted for co-operation with two or more dissimilar counterparts
    • H01R27/02—Coupling parts adapted for co-operation with two or more dissimilar counterparts for simultaneous co-operation with two or more dissimilar counterparts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R35/00—Flexible or turnable line connectors, i.e. the rotation angle being limited
    • H01R35/04—Turnable line connectors with limited rotation angle with frictional contact members
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/32—Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/44—Means for preventing access to live contacts
    • 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 a DC power supply unit, hereinafter abbreviated DC (Direct Current) -An gleichiens called, for an inverter with at least one DC disconnect switch (DC disconnector) with terminals for connection to DC power cables (DC connecting cables), a corresponding inverter, and a power generation system.
  • DC Direct Current
  • Inverters are for example converted into photovoltaic systems for converting the direct current supplied by a photovoltaic generator into an alternating current suitable for feeding into a power supply network.
  • the photovoltaic generator abbreviated to PV generator below, typically comprises a plurality of photovoltaic modules (PV modules), which form a so-called string in series.
  • PV modules photovoltaic modules
  • the series connection of the PV modules results in voltages in the range of several 100 V (V) at the output of the PV generator.
  • a DC connection unit is provided near the inverter, which has a DC disconnector, which separates the DC lines coming from the PV generator as far as possible.
  • DC terminal units are known which are positioned as separate units in the vicinity of the inverter. Connection cables between the DC connection unit and the inverter can be de-energized by the DC disconnect switch, so that initial installation or replacement of the inverter can be carried out safely.
  • the additional DC connection unit leads to an increased material and installation costs in the installation of the photovoltaic system.
  • the publication WO 2012/040761 A1 describes a photovoltaic system in which a DC connection unit with integrated DC circuit breaker is provided, which is connected via DC connections, for example screwed or clamped connections, to the DC lines coming from the PV generator is.
  • the DC connection unit also has plug-in contacts, with which it is plugged directly into an inverter of the PV system. In this way, the additional installation effort for a separate DC connection unit is eliminated.
  • the DC connections designed as screwed or clamped connections do not provide adequate protection against the possibly life-threatening voltage of the PV generator. It is therefore an object of the present invention to provide a DC connection unit for an inverter and an inverter, with which a very simple and safe installation of an inverter of a PV system is possible. This object is achieved by a DC connection unit for an inverter and an inverter having the features of the respective independent claim.
  • the task is further solved by a system of inverter and DC connection unit.
  • a DC connection unit according to the invention of the type mentioned above is characterized in that the connection contacts are formed safe to touch and that the DC connection unit further comprises at least one touch-safe electrical connector, via the DC Disconnector is connected to the finger-safe connection contacts for the DC connection cables.
  • An inverter can be installed or replaced by disconnecting the DC connector with its connector from the inverter. This is preferably done safely after the connector is disconnected from the DC circuit breaker.
  • the DC connection unit can be arranged within a housing of the inverter, whereby the assembly effort is minimized. Due to the touch-proof design of both the connection contacts and the plug connector, there is no danger from a DC connection unit disconnected from the inverter during installation or maintenance.
  • the DC disconnect switch can be arranged within a housing of the DC connection unit such that the connection to the DC connection leads lies intact within the housing. Alternatively, a separate protective cover may be provided for the connection contacts.
  • An inventive inverter in particular for a PV system, is characterized in that within a housing of the inverter, a free space for receiving at least one Gleichstromanschus- selement is formed with a touch-safe connector, wherein in the inverter, a mating connector is arranged with the Connector of the DC connection element cooperates.
  • the mating connector is arranged directly on a printed circuit board of the inverter. This allows compact integration of the DC connection unit into the inverter.
  • a securing means is provided which mechanically interacts with the DC connection unit in such a way that removal and / or insertion of the DC connection unit into the inverter is possible only when the DC disconnection unit of the DC connection unit is switched off.
  • the securing means comprises a keyhole-shaped recess of a housing chassis, wherein the keyhole-shaped recess for receiving a provided for actuating the DC circuit breaker axis is provided with non-circular cross-section.
  • such an inverter and at least one such DC connection element form a power generation system.
  • This in turn results in the advantages mentioned in connection with the DC connection element.
  • other energy-generating elements such as PV generators, connection and communication technology, may belong to the power generation system.
  • Figure 2 is a schematic exploded perspective view of the inverter of Figure 1;
  • FIG. 3 shows a detailed detail of FIG. 2
  • Figure 4 is a plan view of the underside of the DC terminal unit of the figure
  • FIG. 5 shows a sectional drawing through the DC connection unit along the in
  • Figure 4 illustrated section line A-A.
  • Fig. 1 shows in a perspective view as an example of an inverter 10, a photovoltaic inverter.
  • the inverter 10 has a housing chassis 1 1, which carries the essential components of the inverter 10.
  • the housing chassis 1 1 is covered with a lid 16 which has recesses 161 and 162 on one side, which usually points downwards during operation, through which the housing chassis 1 1 is accessible and are guided through the connecting lines in the inverter 10.
  • the recess 161 serves to supply AC lines and / or other cables, such as communication lines, not shown here, and the recess 162 to supply DC power from a PV generator via a DC connecting line 25.
  • the DC connection unit 20 is placed on the circuit board 13, wherein it contacts printed conductors of the printed circuit board 13 via an electrical plug connection 14.
  • the area of the circuit board 13 and the DC connection unit 20 circled in FIG. 2 is shown in greater detail in FIG. 3. Further details of the DC terminal unit 20 will become apparent from Fig. 4, which shows the DC terminal unit 20 in a plan view from the bottom thereof, and Fig. 5, which shows a cross-sectional view along the section line A-A shown in Fig. 4.
  • the DC connection unit 20 When the DC connection unit 20 is placed on the printed circuit board 13, the DC connection unit 20 makes contact with its plug connector 26 (see Fig. 4) with a mating connector 14 which is arranged on the printed circuit board 13, in particular soldered.
  • the plug connector 26 of the DC connection unit 20 shows speaking plug contacts 261 which are recessed as safe as possible in the DC terminal unit 20.
  • the mating connector 14 of the inverter 10 has corresponding plug contacts 141 which are surrounded by a Isolierschürze 142.
  • the DC connection unit 20 has a housing 21 with cover 22.
  • the housing 21 and its cover 22 surround all components with possibly exposed electrical connections safe to touch and, if necessary, sufficiently surrounded the requirements of certain insulation classes.
  • On the housing 21 undercut webs 21 1 are formed, which are guided during insertion with DC connection unit 20 in the inverter 10 in corresponding insertion slots 1 1 1, which are positioned appropriately in the housing chassis 1 1 introduced.
  • Other types of fastening such as locking elements or screw for attaching the housing 21 in the inverter 10 are also conceivable.
  • the cable bushing 24 and the operating knob 232 are arranged on the outwardly facing side of the DC connection unit 20.
  • the operating knob 232 serves to actuate the DC disconnecting switch 23 arranged inside the DC connecting unit 20 by means of an axis 231 (compare FIGS. 4 and 5).
  • axis 231 in the housing chassis 1 1 1 1 1 1 corresponding recesses 1 12, 1 13 are formed between the insertion slots, which receive the cable bushing 24 and the axis 231 when inserted DC connection unit 20.
  • the recess 1 13 is formed for the axis 231 in the form of a keyhole and the axis 231 in cross-section not round, but flattened on two sides.
  • the non-round configuration of the axis 231 in the region between the operating knob 232 and the housing 21, in which the axis 231 is inserted into the keyhole-shaped recess 1 13, can be clearly seen in the comparison of Figures 4 and 5, in which the operating knob 232 in the blocking position is shown.
  • the axis cross-section in the removal direction is increased such that the axis 231 does not fit through the narrowed portion of the recess 13 and the removal of the DC connection unit 20 is blocked.
  • insertion and in particular removal of the DC connection unit 20 under load is prevented, as a result of which arcing is prevented, in particular when the DC connection unit 20 is removed.
  • an actuation of the DC switch 23 is blocked when the DC connection unit 20 is removed. In this way it is prevented that a removed DC connection unit 20, which is still connected via its connecting cable 25 nor with a voltage-providing PV generator, is acted on the plug contacts 261 of the connector 26 with the voltage of the PV generator.
  • Such an actuation lock of the DC disconnect switch 23 can be achieved, for example, via a mechanical blocking of the DC disconnect switch 23, which is canceled by an inserted counter connector 14.
  • the DC connection unit 20 which can be removed from the inverter 10 makes it possible to permanently wire a PV generator via the DC connection line 25 to the DC circuit breaker 23 with the cover 22 of the DC connection unit 20 removed.
  • the connection contacts arranged within the DC connection unit 20 on the DC disconnect switch 23 can be designed as screw contacts for this purpose.

Landscapes

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

Abstract

L'invention concerne un module d'alimentation en courant continu (20) destiné à un onduleur (10), comprenant un disjoncteur à courant continu (23) équipé de contacts de connexion pour le raccordement à des lignes d'alimentation en courant continu (25). Le module d'alimentation en courant continu (20) est caractérisé en ce que les contacts de connexion sont protégés contre les contacts accidentels. Le module comporte en outre un connecteur électrique (26) qui peut être relié aux lignes d'alimentation en courant continu (25) par l'intermédiaire du disjoncteur à courant continu (23). L'invention concerne en outre un onduleur (10), en particulier destiné à une installation photovoltaïque, qui est caractérisé en ce qu'un espace libre est ménagé à l'intérieur d'un boîtier de l'onduleur (10) afin d'y loger au moins un module d'alimentation en courant continu (20) équipé d'un connecteur (26) protégé contre les contacts accidentels. L'onduleur (10) est équipé d'un connecteur conjugué (14) qui coopère avec le connecteur (26) du module d'alimentation en courant continu (20). L'invention concerne également un système de production d'énergie équipé d'un tel module d'alimentation en courant continu (20) et d'un tel onduleur (10).
PCT/EP2014/056487 2013-04-03 2014-03-31 Onduleur et module d'alimentation en courant continu pour onduleur WO2014161828A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201490000459.5U CN205141304U (zh) 2013-04-03 2014-03-31 逆变器、用于逆变器的直流连接单元和发电系统

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013103331.8A DE102013103331A1 (de) 2013-04-03 2013-04-03 Wechselrichter und Gleichstromanschlusseinheit für einen Wechselrichter
DE102013103331.8 2013-04-03

Publications (1)

Publication Number Publication Date
WO2014161828A1 true WO2014161828A1 (fr) 2014-10-09

Family

ID=50391193

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/056487 WO2014161828A1 (fr) 2013-04-03 2014-03-31 Onduleur et module d'alimentation en courant continu pour onduleur

Country Status (3)

Country Link
CN (1) CN205141304U (fr)
DE (2) DE202013012368U1 (fr)
WO (1) WO2014161828A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113936932A (zh) * 2021-11-01 2022-01-14 阳光电源股份有限公司 一种逆变器及直流开关组件

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN216390906U (zh) * 2021-01-18 2022-04-26 阳光电源（上海）有限公司 一种逆变器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE890368C (de) * 1951-05-24 1953-09-17 Siemens Ag Kontakteinrichtung eines Kreuzschienenverteilers fuer eine Batterie-Lade- oder -Entladeschaltung
US6159034A (en) * 1998-06-01 2000-12-12 Royer; George R. Safety cover for electrical outlets
EP2034174A2 (fr) * 2007-09-08 2009-03-11 Tecumseh Power Company Système de démarrage de moteur
DE102008029491A1 (de) * 2008-06-20 2009-12-31 Robert Bosch Gmbh Schutzvorrichtung für eine Solaranlage und Solaranlage
WO2012040761A1 (fr) * 2010-09-30 2012-04-05 Fronius International Gmbh Onduleur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008037738B4 (de) * 2008-08-14 2010-06-24 Sew-Eurodrive Gmbh & Co. Kg Elektrische Steckverbindung und elektrisches Gerät

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE890368C (de) * 1951-05-24 1953-09-17 Siemens Ag Kontakteinrichtung eines Kreuzschienenverteilers fuer eine Batterie-Lade- oder -Entladeschaltung
US6159034A (en) * 1998-06-01 2000-12-12 Royer; George R. Safety cover for electrical outlets
EP2034174A2 (fr) * 2007-09-08 2009-03-11 Tecumseh Power Company Système de démarrage de moteur
DE102008029491A1 (de) * 2008-06-20 2009-12-31 Robert Bosch Gmbh Schutzvorrichtung für eine Solaranlage und Solaranlage
WO2012040761A1 (fr) * 2010-09-30 2012-04-05 Fronius International Gmbh Onduleur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113936932A (zh) * 2021-11-01 2022-01-14 阳光电源股份有限公司 一种逆变器及直流开关组件
CN113936932B (zh) * 2021-11-01 2024-04-12 阳光电源股份有限公司 一种逆变器

Also Published As

Publication number Publication date
DE102013103331A1 (de) 2014-10-09
CN205141304U (zh) 2016-04-06
DE202013012368U1 (de) 2016-06-30

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