WO2013080878A1 - Dispositif de connexion au réseau électrique - Google Patents

Dispositif de connexion au réseau électrique Download PDF

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Publication number
WO2013080878A1
WO2013080878A1 PCT/JP2012/080284 JP2012080284W WO2013080878A1 WO 2013080878 A1 WO2013080878 A1 WO 2013080878A1 JP 2012080284 W JP2012080284 W JP 2012080284W WO 2013080878 A1 WO2013080878 A1 WO 2013080878A1
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WO
WIPO (PCT)
Prior art keywords
power
inverter circuit
phase
relay
circuit
Prior art date
Application number
PCT/JP2012/080284
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English (en)
Japanese (ja)
Inventor
良典 則竹
剛 神村
清磨 山岸
小川　智広
隆史 白川
健雄 石田
Original Assignee
三洋電機株式会社
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.)
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Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to CN201290001022.4U priority Critical patent/CN204244107U/zh
Priority to JP2013547120A priority patent/JP5919483B2/ja
Publication of WO2013080878A1 publication Critical patent/WO2013080878A1/fr

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    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H02J2300/26—The renewable source being solar energy of photovoltaic origin involving maximum power point tracking control for photovoltaic sources
    • 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 present invention relates to a grid interconnection device that converts DC power output from a DC power source such as a solar cell, a fuel cell, or a storage battery into AC power and superimposes the AC power on a commercial system.
  • a DC power source such as a solar cell, a fuel cell, or a storage battery
  • a grid interconnection device that converts DC power output from a DC power source such as a solar cell, a fuel cell, or a storage battery into AC power and links to a commercial power system via a grid interconnection relay has been provided. Yes.
  • the grid interconnection device includes an inverter circuit, a filter circuit, a grid interconnection relay, a control circuit, and the like.
  • the inverter circuit converts DC power output from the DC power source into AC power and outputs the AC power to an output line.
  • the filter circuit includes a filter capacitor, and a part of the output current of the inverter circuit is allowed to flow from the output line to the filter capacitor, and a current from which harmonic components of the output current are removed is allowed to flow to the output line.
  • the grid interconnection relay is connected between the filter circuit and the commercial power system, and disconnects / connects the DC power source and the commercial power system by opening and closing the relay.
  • the control circuit is composed of a microcomputer, gives a signal to the inverter circuit and the grid connection relay, and controls the operation of the inverter circuit and the grid connection relay.
  • some grid interconnection devices perform a self-sustained operation in which a commercial power system is disconnected from the commercial power system and supplied to a load when the power is interrupted (Patent Document 1).
  • a load is connected to two wires branched from an output line via a relay for independent operation.
  • the grid interconnection relay is opened to disconnect the commercial power system and the grid interconnection device, the autonomous operation relay is closed, and single-phase AC power is supplied to the two wires. Thereby, electric power is supplied to the load connected to the two wires, and the user can use the load.
  • JP 2003-87978 A JP 2003-87978 A
  • the grid interconnection device described in Patent Document 1 reduces the voltage between the two wires to ground by grounding one of the two wires from which AC power is output. Yes.
  • the voltage to ground of the ungrounded wire is equal to the voltage of the AC power supplied from the inverter circuit, It becomes equal to the amplitude of the AC power supplied from the inverter circuit.
  • the load can be used more safely as the voltage to ground of the two wires supplied with AC power is lower.
  • the present invention has been made in view of the above-described problems, and provides a grid interconnection device that can reduce the voltage between two wires to which AC power is supplied when performing autonomous operation. With the goal.
  • an inverter circuit that converts DC power to AC power and outputs the AC power to an output line, and a connection / disconnection between the commercial power system and the inverter circuit interposed in the output line
  • a grid connection relay that performs power supply, and is connected to a load via a relay for independent operation, and is connected to a load via a relay for independent operation, and performs independent operation for supplying power to the load by disconnecting the inverter circuit from the commercial power system
  • the two wires are grounded through the resistors, respectively, the two wires are divided by these resistors and are grounded.
  • the voltage between the two wirings can be made smaller than the voltage output from the inverter circuit by the voltage dividing ratio of these resistors.
  • the inverter circuit converts the DC power into a three-phase AC power having a U phase, a V phase, and a W phase when the commercial power system and the inverter circuit are linked. It outputs to the said output line which consists of a U-phase line, a V-phase line, and a W-phase line,
  • the said 2 wiring branches from the 2 output lines of the said 3 output lines, It is characterized by the above-mentioned.
  • the self-sustained operation relay is characterized in that the resistor is interposed in the wiring on the inverter circuit side from a connection point where the resistance is connected to the wiring.
  • a switch element that conducts / cuts off the wiring and the resistor is provided, and when the commercial power system and the inverter circuit perform a linked operation, the switch element is cut off, and the self-supporting When the operation is performed, the switch element is conducted.
  • the resistance values of the resistors connected to the two wirings are the same value.
  • FIG. 1 is a configuration diagram illustrating a photovoltaic power generation system 100 according to the first embodiment.
  • the photovoltaic power generation system 100 includes a solar cell 1 (DC power supply) and a grid interconnection device 2.
  • the grid interconnection device 2 includes a booster circuit 4, an inverter circuit 5, a filter circuit 6, a grid interconnection relay 7, a self-sustaining operation relay 8, a control circuit 9, wirings La and Lb, three output lines Lu, Lv, Lw is provided.
  • the grid interconnection device 2 performs a grid operation in which three-phase AC power output from the inverter circuit 5 is superimposed on the commercial power grid 3 via the grid interconnection relay 7. Further, when the commercial power system 3 has a power failure, the inverter circuit 5 and the commercial power system 3 are disconnected, and a self-sustained operation for supplying single-phase AC power to the load 10 is performed.
  • the commercial power system 3 is a V-connected commercial power system having a U phase, a V phase, and a W phase as shown in FIG. 1, and the V phase is grounded.
  • the U phase has a phase advanced by 120 ° with respect to the V phase, and the W phase has a phase delayed by 120 ° with respect to the V phase.
  • the booster circuit 4 boosts the DC voltage output from the solar cell 1. Then, the booster circuit 4 outputs the boosted DC voltage to the inverter circuit 5.
  • the booster circuit 4 includes a reactor 41, a switch element 42 such as an IGBT (insulated gate bipolar transistor), and a diode 43.
  • a solar cell 1 is connected to the input side of the booster circuit 4, and a reactor 41 and a diode 43 are connected in series with the positive electrode of the solar cell 1.
  • the switch element 42 is connected between the connection point of the reactor 41 and the diode 43 and the negative electrode of the solar cell 1, and opens and closes between them.
  • the operation of the booster circuit 4 is controlled by the control circuit 9. Specifically, the control circuit 9 determines the ON duty ratio and periodically applies a pulse signal having the duty ratio to the gate of the switch element 42. Then, the switch element 42 is periodically opened and closed, and the booster circuit 4 obtains a predetermined boost ratio according to the duty ratio.
  • the inverter circuit 5 includes two capacitors 51 and 52 and a plurality of switch elements 53 to 56, and converts the DC power output from the solar cell 1 through the booster circuit 4 into three-phase AC power.
  • Capacitors 51 and 52 are connected in series to form a series circuit. This series circuit is connected to the diode 43 and the negative electrode of the solar cell 1.
  • the switch element 53 and the switch element 54 are connected in series to form a first arm circuit, and the switch element 55 and the switch element 56 are connected in series to form a second arm circuit.
  • the inverter circuit 5 operates as a three-phase half bridge by connecting a series circuit including capacitors 51 and 52, a first arm circuit, and a second arm circuit in parallel.
  • connection point between the two capacitors 51 and 52 in the series circuit is connected to the V-phase line Lv
  • connection point between the two switching elements 53 and 54 in the first arm circuit is connected to the U-phase line Lu
  • a connection point between the two switching elements 55 and 56 of the circuit is connected to the W-phase line Lw.
  • switch elements 53 to 56 of the inverter circuit 5 a switch element such as an IGBT may be used.
  • the operation of the inverter circuit 5 is controlled by the control circuit 9. The operation of the inverter circuit 5 will be described later.
  • the filter circuit 6 includes reactors 61 and 62 and three filter capacitors 63a, 63b, and 63c.
  • the filter circuit 6 is connected to the connection point of the switch element 51 and the switch element 52, the connection point of the switch element 53 and the switch element 54, and the connection point of the capacitor 3a and the capacitor 3b (the output of the inverter circuit 5). Provided on the side).
  • reactor 61 is interposed in U-phase line Lu
  • reactor 62 is interposed in W-phase line Lw.
  • Each of the filter capacitors 63a, 63b, 63c is connected between three output lines Lu, Lv, Lw.
  • capacitors having the same capacity are used for the filter capacitors 63a to 63c.
  • the filter circuit 6 divides the output current of the inverter circuit 5 into a capacitor current flowing through the filter capacitors 63a, 63b, and 63c and a filter current flowing through the output lines Lu, Lv, and Lw.
  • the filter current from which the harmonic component of the output current of the inverter circuit 5 is removed flows from the filter circuit 6 to the output lines Lu, Lv, Lw on the commercial power system 3 side and is supplied to the commercial power system 30.
  • the grid connection relay 7 is connected to the output lines Lu, Lv, Lw connected to the commercial power system 3 (intervened between the filter circuit 6 and the commercial power system 3) by the contact pieces. Open and close Lw.
  • the system interconnection relay 7 is controlled to be closed or open by a control signal from the control circuit 9, and connects (links) or disconnects the inverter circuit 5 and the commercial system 30.
  • the self-sustaining operation relay 8 opens and closes the wirings La and Lb with the contact pieces interposed in the wirings La and Lb branched from the U-phase line Lu and the W-phase line Lw, respectively.
  • the self-sustained operation relay 8 is controlled to be closed or open by a control signal from the control circuit 9 and connects or disconnects the inverter circuit 5 and the load 10. Further, the wirings La and Lb are grounded via the resistors 11 and 12, respectively, and the relay for independent operation is a wiring on the inverter circuit 5 side from the connection point where the resistors 11 and 12 are connected to the wirings La and Lb. It intervenes in La and Lb. As a result, when the inverter circuit 5 and the load 10 are connected (when the autonomous operation is performed), the wirings La and Lb are grounded via the resistors.
  • the resistors 11 and 12 may be resistors having the same resistance value.
  • the control circuit 9 controls the operations of the booster circuit 4, the inverter circuit 5, the grid interconnection relay 7, and the independent operation relay 8, as described above.
  • the control circuit 9 connects the grid interconnection relay 7 and disconnects the independent operation relay. Further, when performing the autonomous operation, the control circuit 9 disconnects the grid interconnection relay 7 and connects the autonomous operation relay.
  • the control circuit 9 causes the booster circuit 4 to perform an MPPT operation so that the output power of the solar cell is maximized.
  • the MPPT operation is performed by calculating the power Pn from the input current Iin of the booster circuit and the input voltage Vin of the booster circuit, and adjusting the boost ratio of the booster circuit so that the power Pn is maximized.
  • the control circuit 9 changes the operation of the inverter circuit 5 between the case of performing the interconnected operation and the case of performing the independent operation.
  • the control circuit 9 periodically conducts / cuts off the switching elements 53 to 56 according to PWM (Pulse Width Modulation) control and performs DC power output from the solar cell when performing the interconnection operation. Is converted into three-phase AC power. Thereby, the inverter circuit 5 outputs the converted three-phase AC power to the three output lines Lu, Lv, and Lw.
  • PWM Pulse Width Modulation
  • the PWM control in the case of performing the interconnection operation includes a current flowing through the U-phase line Lu downstream of the filter circuit 6 (hereinafter referred to as U-phase line current Iu) and a current flowing through the W-phase line Lu downstream of the filter circuit 6 (hereinafter referred to as W-phase line current Iw) is detected, and current control is performed so that the line currents Iu and Iw become target values Iut and Iwt, respectively.
  • the switching timing of the switch elements 53 and 54 of the first arm circuit is determined based on the line current Iu
  • the switching timing of the second arm circuit is determined based on the line current Iw. That is, the control circuit 9 creates command values Iut and Iwt for each arm circuit, and controls the switch timing of the switch elements of each arm circuit.
  • the inverter circuit 5 When the control circuit 9 performs a self-sustained operation, the inverter circuit 5 periodically turns on / off the switch elements 53 to 56 according to PWM (Pulse Width Modulation) control, and directs the DC power output from the solar cell. Convert to single-phase AC power. Thereby, the inverter circuit 5 outputs the converted single-phase AC power to the U-phase line Lu and the W-phase line Lw.
  • PWM Pulse Width Modulation
  • the PWM control detects the voltage V (or the voltage between the wirings La and Lb) applied to the U-phase line Lu and the W-phase line Lw downstream from the filter circuit 6, and this voltage V Is performed by voltage control so as to be the target value Vt. Specifically, the switching timing of the switch elements 53 and 54 of the first arm circuit and the switch elements 55 and 56 of the second arm circuit is determined based on the voltage V. That is, the control circuit 9 creates a command value Vt common to both the first and second arm circuits, and controls the switch timing of the switch elements of both the first and second arm circuits.
  • the grid interconnection device 2 outputs single-phase AC power using the output of the first arm circuit and the output of the second arm circuit when performing the independent operation in this way, and the inverter circuit 5 Are operated as a single-phase full bridge by the first arm circuit and the second arm circuit to generate single-phase AC power.
  • the two wirings La and Lb are grounded through the resistors, the two wirings La and Lb are divided by the resistors 11 and 12. It will be grounded. As a result, the ground voltage of the two wirings La and Lb can be made smaller than the voltage output from the inverter circuit 5 by the voltage dividing ratio of these resistors.
  • the voltage between the wirings La and Lb and the ground is the voltage output from the inverter circuit during the independent operation.
  • the voltage applied between the wirings La and Lb and the ground can be made the smallest among the methods using this method.
  • the autonomous driving relay 8 is interposed in the wiring on the inverter circuit side from the connection point where the resistors 11 and 12 are connected to the wirings La and Lb.
  • the resistors 11 and 12 are disconnected from the inverter circuit 5 during the interconnection operation, so that power consumption by the resistors 11 and 12 is eliminated and efficiency is improved.
  • the single-phase AC power is supplied instead of the three-phase AC power during the self-sustained operation, a load that operates with the single-phase AC power can be easily used. .
  • the inverter circuit 5 includes a transformerless inverter.
  • FIG. 2 is a configuration diagram showing grounding of the autonomous operation wirings La and Lb according to the second embodiment.
  • the self-sustaining operation relay 8 is interposed in the wirings La and Lb on the commercial power system 3 side from the connection point where the resistors 11 and 12 are connected to the wirings La and Lb.
  • a switch circuit 13 that connects / disconnects the resistor 11 and the wiring La is provided, and a switch circuit 14 that connects / disconnects the resistor 11 and the wiring Lb is provided.
  • the switch circuits 13 and 14 are turned on / off at the same timing as the self-sustaining operation relay 8. That is, when performing the interconnection operation, the switch circuits 13 and 14 are cut off, and when performing the independent operation, the connection state is established. By doing so, as in the first embodiment, the inverter circuit 5 and the resistors 13 and 14 are disconnected during the interconnected operation, so that the power consumption by the resistors 11 and 12 is eliminated and the efficiency is improved.
  • the operations of the switch circuits 13 and 14 are controlled by the control circuit 9.
  • the inverter circuit 5 when the independent operation is started, after the switch circuits 13 and 14 are switched from the cut-off state to the conductive state, the inverter circuit 5 starts to generate the single-phase AC power, and then the self-sustained operation.
  • the operation relay 8 may be changed from the disconnected state to the connected state.
  • the inverter circuit 5 can be operated and power can be supplied to the load while the ground and the wirings La and Lb are grounded, the load on the load can be reduced.
  • the switch circuits 13 and 14 are provided so that the inverter circuit 5 and the resistors 11 and 12 are disconnected during the interconnected operation.
  • the wirings La and Lb are provided. Can be grounded through the resistors 11 and 12, respectively, the switch circuits 13 and 14 are not provided, and the resistors 11 and 12 may be connected to the wirings La and Lb, respectively.
  • FIG. 3 is a diagram showing a solar power generation system 100 according to the third embodiment.
  • a capacitor 57 is used instead of the capacitors 51 and 52, and the capacitor 57 is connected in parallel with the first arm circuit and the second arm circuit.
  • a so-called full bridge type inverter circuit is used.
  • Two output lines L1 and L2 are connected to the first arm circuit and the second arm circuit, respectively.
  • the inverter circuit 5a converts the DC power into single-phase AC power and outputs it to the two output lines L1 and L2.
  • the control circuit 9 controls the inverter circuit 5a.
  • the grid interconnection device 2a supplies single-phase AC power to the commercial power grid 3a when performing grid operation, and loads single-phase AC power as a load 10 when performing independent operation. To supply.
  • a filter circuit 6a including a reactor 61, a reactor 62, and a capacitor 63 is used.
  • Reactor 61 is interposed in output line L1
  • reactor 62 is interposed in output line L2.
  • Capacitor 57 connects commercial power system 3 side of output lines L1 and L2 in which reactors 61 and 62 are interposed. Thereby, the harmonic component of the alternating current power output from the inverter circuit 5a is removed.
  • the two output lines L1 and L2 are connected to a single-phase three-wire commercial power system 3b via the filter circuit 6a and the grid interconnection relay 7.
  • the present invention can also be applied to the single-phase inverter circuit 5a.
  • the solar cell 1 is used as a DC power source
  • other DC power sources such as a fuel cell and a storage battery can also be used.
  • FIG. 4 is a diagram showing a connection when a switching relay 70 having a switching contact piece is used.
  • FIG. 4A shows a case where a relay having a switching contact is applied to an inverter circuit 5 that outputs three-phase AC power
  • FIG. 4B applies to an inverter circuit 5a that outputs single-phase AC power. It is a thing. As shown in FIG.
  • the switching relay 70 has the number of output lines, that is, three in the case of three phases and two in the case of single phase.
  • the switchable relay 70 switches the output path by selecting and connecting the input side contact of each piece and one of the two output side contacts corresponding to each input side contact.
  • Respective output lines Lu, Lw, Lv, L1, L2 are connected to each input side contact of the switching relay 70, and one of the two output side contacts is an output line Lu connected to the commercial power system 3, respectively. , Lw, Lv, L1, and L2 are connected. Moreover, wiring La, Lb connected to the load 10 is connected to the other of the two output side contacts, and the AC power converted by the inverter circuit 5 is switched by switching the connection destination of the contact piece of the switching relay 70. The supply destination can be switched.
  • the wirings La and Lb are connected to the output side contacts connected to the output lines Lu and Lw, and nothing is connected to the output side contact connected to the output line Lv and the circuit is opened. It has become.
  • AC power is supplied to the wirings La and Lb from the output lines Lu and Lw connected to the first and second arm circuits.
  • the wirings La and Lb are connected to the output side contacts connected to the output lines L1 and L2.
  • the switching relay 70 connects the inverter circuit 5 and the load 10 when not performing the interconnection operation, such as when performing the independent operation, so as to connect the inverter circuit 5 and the commercial power system 3 when performing the interconnection operation. Switch the piece to connect.
  • the switchable relay 70 is interposed in the output lines Lu, Lv, Lw, L1, L2 and the wirings La, Lb, and also serves as a grid interconnection relay and a self-sustaining operation relay.
  • the relay 71 has the same number of open / close-type contact pieces as the number of output lines, and these contact pieces are interposed in the output lines Lu, Lv, Lw, L1, and L2.
  • the relay 71 is for disconnecting the grid interconnection device 2 from the commercial power system 3 and the load 10.
  • the relay 71 puts the output lines Lu, Lv, Lw, L1, and L2 in the connected state when the inverter circuit 5 operates (including during the interconnected operation and the independent operation), and outputs when the inverter circuit 5 stops. Lines Lu, Lv, Lw, L1, and L2 are opened.

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

Abstract

L'objet de la présente invention est de fournir un dispositif de connexion au réseau électrique qui permet de réduire davantage les tensions, par rapport à la masse, de deux fils auxquels une alimentation en courant alternatif est fournie lorsque le dispositif est en mode de fonctionnement indépendant. La présente invention a trait à un dispositif de connexion au réseau électrique qui est équipé de ce qui suit : un circuit inverseur (5) qui convertit une alimentation en courant continu en une alimentation en courant alternatif et qui fournit en sortie ladite alimentation en courant alternatif à des fils de sortie ; des relais de connexion au réseau électrique (7) qui sont disposés sur les fils de sortie (Lu, Lw) et qui connectent/déconnectent le circuit inverseur (5) à/d'un réseau électrique à usage général (3) ; et deux fils (La, Lb) qui bifurquent à partir des fils de sortie (Lu, Lw) susmentionnés, qui sont connectés à une charge (10) par l'intermédiaire de relais à fonctionnement indépendant (8) et qui sont alimentés par une alimentation en courant alternatif monophasée à partir du circuit inverseur (5) lorsqu'est appliqué un mode de fonctionnement indépendant où l'énergie power est fournie à une charge (10) et le circuit inverseur (5) est découplé du réseau électrique à usage général (3). Le dispositif de connexion au réseau électrique selon la présente invention est caractérisé en ce que, en mode de fonctionnement indépendant, les relais de connexion au réseau électrique (7) sont ouverts, les relais à fonctionnement indépendant (8) sont fermés et les deux fils (La, Lb) susmentionnés sont chacun mis à la terre par l'intermédiaire d'une résistance (11, 12).
PCT/JP2012/080284 2011-11-29 2012-11-22 Dispositif de connexion au réseau électrique WO2013080878A1 (fr)

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CN201290001022.4U CN204244107U (zh) 2011-11-29 2012-11-22 并网装置
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Cited By (6)

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WO2014203091A1 (fr) * 2013-06-18 2014-12-24 Sma Solar Technology Ag Procédé et agencement pour l'égalisation active de potentiels de référence avant le raccordement au réseau d'une installation photovoltaïque
JP2015015782A (ja) * 2013-07-03 2015-01-22 サンケン電気株式会社 系統連系インバータ装置
TWI553986B (zh) * 2015-09-24 2016-10-11 台達電子工業股份有限公司 應用雙電網之逆變器裝置及應用雙電網之太陽能併網發電系統
JPWO2015107706A1 (ja) * 2014-01-20 2017-03-23 三菱電機株式会社 電力変換装置
JP2019022432A (ja) * 2017-07-17 2019-02-07 陽光電源股▲ふん▼有限公司 インバーター及びその制御方法、制御装置、制御システム
JP2019527020A (ja) * 2016-09-06 2019-09-19 エスエムエイ ソーラー テクノロジー アクティエンゲゼルシャフトＳＭＡ Ｓｏｌａｒ Ｔｅｃｈｎｏｌｏｇｙ ＡＧ トランスレス単相ネットワークインバータのハイブリッドクロック方法

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WO2014203091A1 (fr) * 2013-06-18 2014-12-24 Sma Solar Technology Ag Procédé et agencement pour l'égalisation active de potentiels de référence avant le raccordement au réseau d'une installation photovoltaïque
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JPWO2015107706A1 (ja) * 2014-01-20 2017-03-23 三菱電機株式会社 電力変換装置
TWI553986B (zh) * 2015-09-24 2016-10-11 台達電子工業股份有限公司 應用雙電網之逆變器裝置及應用雙電網之太陽能併網發電系統
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JP2019527020A (ja) * 2016-09-06 2019-09-19 エスエムエイ ソーラー テクノロジー アクティエンゲゼルシャフトＳＭＡ Ｓｏｌａｒ Ｔｅｃｈｎｏｌｏｇｙ ＡＧ トランスレス単相ネットワークインバータのハイブリッドクロック方法
JP7086054B2 (ja) 2016-09-06 2022-06-17 エスエムエイ ソーラー テクノロジー アクティエンゲゼルシャフト トランスレス単相ネットワークインバータのハイブリッドクロック方法
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