WO2012104335A1 - Onduleur générateur de signaux et procédé de fonctionnement d'un onduleur - Google Patents

Onduleur générateur de signaux et procédé de fonctionnement d'un onduleur Download PDF

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Publication number
WO2012104335A1
WO2012104335A1 PCT/EP2012/051649 EP2012051649W WO2012104335A1 WO 2012104335 A1 WO2012104335 A1 WO 2012104335A1 EP 2012051649 W EP2012051649 W EP 2012051649W WO 2012104335 A1 WO2012104335 A1 WO 2012104335A1
Authority
WO
WIPO (PCT)
Prior art keywords
inverter
signal
connection
life
life signal
Prior art date
Application number
PCT/EP2012/051649
Other languages
German (de)
English (en)
Inventor
Matthias Victor
Frank Greizer
Gerd Bettenwort
Jens Friebe
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 CN2012900002285U priority Critical patent/CN203325913U/zh
Priority to DE112012000262T priority patent/DE112012000262A5/de
Publication of WO2012104335A1 publication Critical patent/WO2012104335A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/02016—Circuit arrangements of general character for the devices
    • H01L31/02019—Circuit arrangements of general character for the devices for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/02021—Circuit arrangements of general character for the devices for devices characterised by at least one potential jump barrier or surface barrier for solar cells

Definitions

  • the invention relates to an inverter, in particular an inverter as part of a power generation plant having the features of claim 1, and a method having the features of claim 13.
  • the document DE102006060815A1 discloses a solar power plant whose generator is composed of several interconnected PV modules, and which feeds via an inverter into a low-voltage grid.
  • Each module is associated with a switching element, with which the respective module is switched dead in a missing enable signal.
  • Release signal is a modulated on the DC lines carrier signal, the release is to be done by a downstream equipment.
  • DE102006060815A1 thus initially only a safe generator is created; However, there is no concrete indication in the text as to which means and by what triggering event a downstream resource will cause such a release.
  • Generator field can be switched by a switching device on the generator field in a safe operating point.
  • Switching device contained protection device takes place here by a
  • an object of the present invention to provide an inverter capable of generating a signal receivable by associated switching elements having receiving units, such that a correspondingly established generator or the electrical connection between the generator and the inverter between a safe state and an operating state for feeding power into
  • the inverter according to the invention as part of a power generation plant for feeding a power from a DC power source via a
  • DC connection is provided, in a AC network, a status unit for detecting a normal state and a special state, or for distinguishing between these states of the inverter on.
  • This status unit is so with a signal generator for generating a
  • Life signal is generated on the DC link.
  • the life signal may then be received, for example, from a suitably established receiver associated with a generator or part of a generator, such as a module, then from a safe state in which there is no or only a safe voltage on the lines of the DC link the power generation plant is present, in the necessary for feeding power into an AC power operating condition to transfer. Accordingly, such a generator will remain in the safe state or transferred into this, if the life signal is not or no longer generated in the case of the special state of the inverter.
  • the inverter is therefore preferably set up in such a way that the status unit recognizes the special status when the AC network is omitted.
  • the signal generator is adapted to a high-frequency, many times higher than a mains frequency
  • This alternating current signal can be inductively coupled into the direct current connection, for example, by means of a coupling coil which is connected to the signal generator.
  • Inverters often have additional DC-to-DC converters, such as a boost converter, buck converter, or a galvanic isolator, in front of the converter circuit, which converts the DC power into AC power
  • the coupling coil can therefore be part of a
  • an alternative form of coupling of the signal generated by the signal generator life signal in the DC connection can be realized that the signal generator is connected via a coupling capacitor for capacitive coupling of the life signal to the DC connection.
  • the signal generator instead of an inductive or capacitive coupling of the life signal generated by the signal generator in the DC link, the signal generator, the life signal on the DC voltage connection by means of a clockable switch, the drive is connected to the signal generator, generate.
  • the signal generator can generate a current signal or voltage signal corresponding to the switch timing on the DC connection.
  • the switch can be arranged for example in one or between the DC lines. It can to
  • Inverters typically include a Maximum Power Point Tracking (MPP) unit configured to adjust the power of the DC power source to a maximum value by varying a voltage of the DC power source.
  • MPP Maximum Power Point Tracking
  • Such an MPP tracker may also serve as a signal generator and generate the life signal on the DC link, the life signal of a characteristic magnitude of the voltage generated by the MPP tracker, in particular a frequency of change, a jump level or a rate of variation of the voltage, or a combination corresponds to these sizes.
  • inverter in a further embodiment of the inverter according to the invention can be generated by the signal generator not only in the normal state, the life signal, but also in the special state, a second signal different from the life signal on the DC link.
  • an operating state of the inverter is first determined, at least distinguishing between a normal state and a special state. Only in the case that a normal state of the inverter is detected, the inverter generates a live signal on the DC link.
  • Life signal can as described above to implement a
  • the determination of the operating state can be advantageously carried out in the form of a monitoring of the AC network to the AC connection, whereby the change in the special state by a
  • Inverter located can be brought about by an electrical supply network targeted, which is a standard measure of the fire department in case of fire.
  • the generation of the life signal can be done by a
  • DC converter or an MPP tracker of the inverter is operated in a first manner, which differs from a second mode of operation, which use the aforementioned components of the inverter in the special state.
  • the two modes of operation differ by temporal courses of current and / or voltage on the DC connection whose
  • inverter as a multi-phase, in particular three-phase inverter, although in favor of clarity in the following the invention only by way of example
  • FIG. 1 is a block diagram of a power plant according to the invention
  • Coupling coil is realized as part of a DC-DC converter and
  • the power generating plant 1 shown in Figure 1 has a DC power source 10, for example, a photovoltaic generator, which via a
  • DC connection 60 is connected to an inverter 20 for power transmission.
  • the power transmitted as DC power is converted by the inverter 20 by means of a converter circuit 50 into an alternating current and fed via an alternating current connection 90 in an alternating current network 30.
  • the inverter 20 has a status unit 25, which monitors the operating state of the inverter, and between a
  • Normal state and a special state of the inverter 20 may differ.
  • the special status is at least assumed if
  • Events are detected by the inverter, which require a safe state of the DC power source 10 and the DC link 60.
  • This can be, for example, events of an electrical nature, which the inverter, for example, via its current and voltage sensors or his
  • Communication devices receives as data signals, trigger a change of the status unit 25 in the special state.
  • the status unit 25 receives as data signals, triggers a change of the status unit 25 in the special state.
  • a self-test of the functionalities of the inverter 20 can also be used to detect a transition between the states of the inverter
  • Direct current connection 60 transferred to a receiver 80, the is arranged to detect the presence of the life signal 70 on the DC link 60.
  • the receiver 80 may be located in the vicinity of the DC power source 10 and depending on the presence of the life signal 70 on the
  • DC connection 60 interrupts, for example, by disconnecting the
  • DC connection 60 between DC power source 10 and inverter 20 disconnects or short-circuits the DC power source 10. In this way, the direct current connection 60 can be brought into a safe state at the instigation of the inverter 20, if necessary.
  • the inverter 20 can successfully transition the inverter 20
  • Communication channels continue, for example, by electricity or
  • Voltage on the DC link 60 are determined, or by the receiver 80 via another transmission path (wired or wireless), the successful transfer of the DC power source 10 in the safe state to the inverter 20 or a separate signaling device.
  • the successful transition to the safe state can be combined with the fact that only in this case the
  • DC connection 60 can be separated, for example by an electromechanical safety lock is released from corresponding connectors.
  • the transition from a normal state to a special state can hereby be brought about because of a large number of events. For example, the detection of a Netzwegfalls can lead to a special state is accepted by the inverter 20, whereupon the signal generator 40 stops the generation of the life signal 70 on the DC link 60.
  • the inverter 20 shown in Figure 2 has a network monitoring 1 10 for monitoring the AC network 30, which here to the AC terminals 91, 92 is connected, wherein the network monitoring 1 10 is connected to the status unit 25, and transmits a corresponding signal upon the elimination of the AC network 30.
  • the AC connection 90 at the terminals 91, 92 is typically separated in this case by means of a power disconnect switch 130.
  • the inverter of Figure 2 shows a coupling coil 100, which allows an inductive coupling of the signal generated by the signal generator 40 life signal 70 in the DC connection 60, formed by the DC terminals 61, 62.
  • the life signal 70 preferably comprises a high-frequency alternating current signal in a frequency range between 10 kHz and 300 kHz.
  • the coupling of a high-frequency life signal 70 can also take place in a capacitive manner, the frequency range being comparable.
  • the signal generator 40 and the
  • a coupling capacitor 140 is arranged. Both in the inductive coupling according to Figure 2 and in the capacitive
  • the signal generator 40 is galvanically from the
  • the inductive coupling can also be realized by means of the inductance, which is part of a
  • DC-DC converter 120 for example a boost converter.
  • a corresponding structure of an inverter 20 is shown in FIG.
  • other known types of DC-DC converters can be used.
  • Life signal 70 can also be accomplished by a switchable switch 150, which is connected to the DC connection 60, is controlled by the signal generator 40. It is conceivable that via the activation of the tactile switch 150, a voltage or current source clocked with one of
  • Life signal 70 in the form of a switch timing corresponding current signal or generates voltage signal.
  • the tactile switch 150 may be integrated into the inverter 20 specifically for this purpose, or the signal generator 40 is connected to the control of an already existing tactile switch, that its timing is changed so that the life signal 70 to the
  • the switch also fulfills a further function within the inverter 20.
  • An example of an already existing tactile switch is a switch of a DC-DC converter 120 from FIG. 4.
  • the life signal 70 can consist, for example, in the selection of an operating frequency of the switch or in the selection of a characteristic clock pattern.
  • MPP Maximum Power Point
  • the signal generator 40 may cooperate with the MPP tracker so that a characteristic quantity for the operation of the MPP tracker in dependence on the state, which is predetermined by the status unit 25, is changed. Possible options for the changed characteristic size are, for example, the time intervals in which the voltage is changed or the magnitude of the voltage change, or the speed at which the voltage is changed, or combinations of these variables. In this case, the life signal 70 then consists of choosing a value for the corresponding characteristic quantity.
  • the inverter 20 is thus used in the normal state in a first mode and in a special state in a second mode, the two modes of operation to distinguish each other Lead times of current and / or voltage on the DC connection 60.
  • the buzzer 40 may apply a second signal to the DC link 60 that is different from the live signal 70, or the buzzer 40 may be disabled in this case and not output a signal. It is also conceivable that the life signal 70 and / or the second signal from complex
  • Signal forms are composed, which have a redundancy function, so that an erroneous recognition of one or the other waveform can be minimized or excluded by the receiver 80.
  • the return from the special state to the normal state of the inverter 20 can be triggered by the fact that the event which has led to the inverter 20 changing over from the normal state to the special state no longer exists.
  • the inverter 20 can automatically return to the normal state when the AC grid 30 is present again after previous omission, which can be detected by the grid monitoring 1 10. Frequently it is also desirable that the
  • Inverter 20 does not automatically return to normal.
  • the life signal 70 must be further generated during this time.
  • AC network 30 also be accomplished via a monitoring circuit of the electrical system.
  • a monitoring circuit of the electrical system Of course, the use of a
  • Energy storage e.g. a rechargeable battery, conceivable to ensure that to maintain the life signal generation or the condition monitoring during the periods in which other energy sources are not available.
  • the invention is not limited to the described embodiments, which can be modified in many ways and expertly supplemented. In particular, it is possible to carry out the features mentioned in other than the said combinations. Also, other or additional actions can be triggered within the power generation system with the life signal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un onduleur (20) pour injecter dans un réseau de courant alternatif (30) une puissance qui est fournie par une source de courant continu (10) par l'intermédiaire d'une liaison de courant continu (60). L'onduleur (20) présente une unité d'état (25) pour détecter un état normal et un état particulier de l'onduleur (20) ainsi qu'un émetteur de signaux (40) pour générer un signal d'activité (70) sur la liaison de courant continu (60), l'onduleur (20) étant conçu de telle manière que le signal d'activité (70) ne soit généré que dans l'état normal sur la liaison de courant continu (60). L'invention concerne également un procédé correspondant pour faire fonctionner l'onduleur (20).
PCT/EP2012/051649 2011-02-02 2012-02-01 Onduleur générateur de signaux et procédé de fonctionnement d'un onduleur WO2012104335A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2012900002285U CN203325913U (zh) 2011-02-02 2012-02-01 逆变器
DE112012000262T DE112012000262A5 (de) 2011-02-02 2012-02-01 Signalerzeugender wechselrichter und betriebsverfahren für einen wechselrichter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011010172.1 2011-02-02
DE102011010172A DE102011010172A1 (de) 2011-02-02 2011-02-02 Signalerzeugender Wechselrichter und Betriebsverfahren für einen Wechselrichter

Publications (1)

Publication Number Publication Date
WO2012104335A1 true WO2012104335A1 (fr) 2012-08-09

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Application Number Title Priority Date Filing Date
PCT/EP2012/051649 WO2012104335A1 (fr) 2011-02-02 2012-02-01 Onduleur générateur de signaux et procédé de fonctionnement d'un onduleur

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CN (1) CN203325913U (fr)
DE (2) DE102011010172A1 (fr)
WO (1) WO2012104335A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2518592B (en) * 2013-08-06 2016-02-24 Ge Aviat Systems Ltd Built-in testing of an arc fault/transient detector

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006060815A1 (de) * 2006-09-21 2008-06-19 Res Gmbh Solarenergieerzeugungsanlage
EP2077588A2 (fr) * 2008-01-05 2009-07-08 Joachim Stoeber Unité de surveillance pour modules photovoltaïques
US20100139734A1 (en) * 2009-02-05 2010-06-10 Tigo Energy Systems and Methods for an Enhanced Watchdog in Solar Module Installations
FR2940548A3 (fr) * 2008-12-23 2010-06-25 Transenergie Dispositif de controle d'une installation de production d'energie electrique et installation de production d'energie electrique mettant en oeuvre un tel dispositif
WO2010078303A2 (fr) * 2008-12-29 2010-07-08 Atonometrics, Inc. Système d'arrêt de sécurité électrique et dispositifs pour modules photovoltaïques

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005018173B4 (de) 2005-04-19 2009-05-14 Swiontek, Karl, Dipl.-Ing. Schalteinrichtung zur sicheren Betriebsunterbrechung von Photovoltaikanlagen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006060815A1 (de) * 2006-09-21 2008-06-19 Res Gmbh Solarenergieerzeugungsanlage
EP2077588A2 (fr) * 2008-01-05 2009-07-08 Joachim Stoeber Unité de surveillance pour modules photovoltaïques
FR2940548A3 (fr) * 2008-12-23 2010-06-25 Transenergie Dispositif de controle d'une installation de production d'energie electrique et installation de production d'energie electrique mettant en oeuvre un tel dispositif
WO2010078303A2 (fr) * 2008-12-29 2010-07-08 Atonometrics, Inc. Système d'arrêt de sécurité électrique et dispositifs pour modules photovoltaïques
US20100139734A1 (en) * 2009-02-05 2010-06-10 Tigo Energy Systems and Methods for an Enhanced Watchdog in Solar Module Installations

Also Published As

Publication number Publication date
DE112012000262A5 (de) 2013-09-12
DE102011010172A1 (de) 2013-06-13
CN203325913U (zh) 2013-12-04

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