公开(公告)号：US12132443B2

公开(公告)日：2024-10-29

申请号：US17865606

申请日：2022-07-15

Applicant: SMA Solar Technology AG

Inventor： Marcel Kratochvil ,  Rainer Schmitt ,  Torsten Otto ,  Sybille Pape

IPC: G01R31/66 ,  H02J3/14 ,  H02J3/38 ,  H02S40/32 ,  H02S40/36 ,  H02S50/00

CPC classification number: H02S50/00 ,  G01R31/66 ,  H02J3/14 ,  H02J3/381 ,  H02S40/32 ,  H02S40/36 ,  H02J2300/24

Abstract: The disclosure describes a method for detecting an arc in a direct-current (DC) circuit comprising a DC load, a DC source supplying the DC load, and a circuit arrangement arranged between the DC source and the DC load. A power flow P between an input and an output of the circuit arrangement is suppressed by means of a switching circuit through cyclical interruption such that the power flow P is enabled in an active time window with the first period Δt1 and the power flow P is suppressed in an inactive time window with the second period Δt2. Via detection of an input current Iin flowing at the input and/or an input voltage Uin applied to the input and comparison of values of the input current Iin and/or input voltage Uin detected in the inactive time window with a current threshold value ITH or a voltage threshold value UTH an arc presence criterion is signaled if the input current Iin detected in the inactive time window falls below the current threshold value ITH and/or the input voltage Uin detected in the inactive time window does not exceed the voltage threshold value UTH. The application also describes a circuit arrangement for detecting an arc and a photovoltaic (PV) inverter including such a circuit arrangement.

公开(公告)号：US11567142B2

公开(公告)日：2023-01-31

申请号：US17375448

申请日：2021-07-14

Applicant: SMA Solar Technology AG

Inventor： Marcel Kratochvil ,  Raimund Thiel ,  Rainer Schmitt

IPC: G01R31/40 ,  H02H1/00

Abstract: A method of detecting a serial arc fault in a DC-power circuit includes injecting an RF-signal with a narrow band-width into the DC-power circuit and measuring a response signal related to the injected RF-signal in the DC-power circuit. The method further includes determining a time derivative of the response signal, analyzing the time derivative, and signaling an occurrence of a serial arc fault in the power circuit based on the results of the analysis. A system for detecting an arc fault is configured to perform a method as described before.

公开(公告)号：US09435845B2

公开(公告)日：2016-09-06

申请号：US14230423

申请日：2014-03-31

Applicant: SMA Solar Technology AG

Inventor： Johannes Lang ,  Thomas Wegener ,  Marcel Kratochvil ,  Holger Behrends ,  Michael Viotto

IPC: G01R31/02 ,  H02H9/08 ,  H01H9/50 ,  H01H33/26 ,  G01R31/333 ,  H02H1/00 ,  H01H83/20 ,  H02H7/20

CPC classification number: G01R31/025 ,  G01R31/333 ,  H01H9/50 ,  H01H33/26 ,  H01H83/20 ,  H02H1/0015 ,  H02H7/205

Abstract: The disclosure relates to a method for detecting an arc in a DC circuit. The method includes measuring and analyzing an AC component (IAC) of a current (I) flowing in the circuit and determining at least one parameter of the AC component (IAC). The level of a DC component (IDC) of the current (I) is varied and a degree of correlation between the level of the DC component (IDC) of the current (I) flowing in the DC circuit and the at least one parameter of the AC component (IAC) is determined. An arc is detected and selectively signaled based on the degree of the determined correlation. The disclosure also relates to an apparatus for carrying out the method and to an inverter comprising such an apparatus.

Abstract translation: 本公开涉及一种用于检测直流电路中的电弧的方法。 该方法包括测量和分析在电路中流动的电流（I）的AC分量（IAC）并确定AC分量（IAC）的至少一个参数。 电流（I）的DC分量（IDC）的电平变化，并且在直流电路中流动的电流（I）的直流分量（IDC）的电平与至少一个参数 AC分量（IAC）被确定。 基于所确定的相关度的程度来检测并选择性地发出电弧。 本公开还涉及一种用于执行该方法的装置以及包括这种装置的逆变器。

公开(公告)号：US20150077884A1

公开(公告)日：2015-03-19

申请号：US14540214

申请日：2014-11-13

Applicant: SMA Solar Technology AG

Inventor： Holger Behrends ,  Marcel Kratochvil ,  Markus Hopf

IPC: H01L31/02 ,  H02H1/00

CPC classification number: H01L31/02021 ,  G01R31/1227 ,  H02H1/0015 ,  H02H7/20 ,  H02H7/261 ,  H02J3/383 ,  Y02E10/563

Abstract: The disclosure relates to a method for localizing and quenching an arc in a PV generator of a PV system, wherein the PV generator includes at least two PV subgenerators. An arc quenching circuit is associated with each PV subgenerator. The method includes detecting an arc in the PV generator. Then, a probability value is determined for each of the PV subgenerators, wherein the probability value is correlated with a probability that the arc is located in the corresponding PV subgenerator. A sequence for activating the arc quenching circuits is then determined that is dependent on the determined probability values. Then, the arc quenching circuits are activated successively in the order of the determined sequence.

Abstract translation: 本公开涉及一种用于在PV系统的PV发电机中定位和淬火电弧的方法，其中PV发电机包括至少两个PV子发电机。 一个灭弧电路与每个PV子发电机相关联。 该方法包括检测光伏发电机中的电弧。 然后，为每个PV子发生器确定概率值，其中概率值与弧位于相应PV子发生器中的概率相关。 然后确定用于激活灭弧电路的序列，其依赖于确定的概率值。 然后，按照确定的顺序依次激活灭弧回路。

公开(公告)号：US20140210485A1

公开(公告)日：2014-07-31

申请号：US14230423

申请日：2014-03-31

Applicant: SMA Solar Technology AG

Inventor： Johannes Lang ,  Thomas Wegener ,  Marcel Kratochvil ,  Holger Behrends ,  Michael Viotto

IPC: G01R31/02

CPC classification number: G01R31/025 ,  G01R31/333 ,  H01H9/50 ,  H01H33/26 ,  H01H83/20 ,  H02H1/0015 ,  H02H7/205

Abstract: The disclosure relates to a method for detecting an arc in a DC circuit. The method includes measuring and analyzing an AC component (IAC) of a current (I) flowing in the circuit and determining at least one parameter of the AC component (IAC). The level of a DC component (IDC) of the current (I) is varied and a degree of correlation between the level of the DC component (IDC) of the current (I) flowing in the DC circuit and the at least one parameter of the AC component (IAC) is determined. An arc is detected and selectively signaled based on the degree of the determined correlation. The disclosure also relates to an apparatus for carrying out the method and to an inverter comprising such an apparatus.

Abstract translation: 本公开涉及一种用于检测直流电路中的电弧的方法。 该方法包括测量和分析在电路中流动的电流（I）的AC分量（IAC）并确定AC分量（IAC）的至少一个参数。 电流（I）的DC分量（IDC）的电平变化，并且在直流电路中流动的电流（I）的直流分量（IDC）的电平与至少一个参数 AC分量（IAC）被确定。 基于所确定的相关度的程度来检测并选择性地发出电弧。 本公开还涉及一种用于执行该方法的装置以及包括这种装置的逆变器。

公开(公告)号：US20240162705A1

公开(公告)日：2024-05-16

申请号：US18389971

申请日：2023-12-20

Applicant: SMA Solar Technology AG

Inventor： Marcel Kratochvil ,  Alexander Unru

IPC: H02J1/00 ,  H02J3/38 ,  H02J5/00

CPC classification number: H02J1/002 ,  H02J3/38 ,  H02J5/00 ,  H02J2300/26

Abstract: The disclosure relates to a method for operating an energy supply system, wherein a first and a second DC unit exchange power with an AC bus using a first and a second power converter. With transmission using a transformer, this power is combined and converted using a third power converter into a DC grid power of a DC grid and/or vice versa.

公开(公告)号：US20230291303A1

公开(公告)日：2023-09-14

申请号：US18316286

申请日：2023-05-12

Applicant: SMA Solar Technology AG

Inventor： Alexander Unru ,  Marcel Kratochvil ,  Burkard Müller

IPC: H02M1/32 ,  H02M1/00 ,  H02M7/04 ,  H02J1/00

CPC classification number: H02M1/32 ,  H02M1/0009 ,  H02M7/04 ,  H02J1/00

Abstract: A power converter between an AC side and DC of the power converter is disclosed. The AC side is connected to an AC supply grid and the DC side is connected to a DC grid. The power converter includes a bridge circuit connected to the AC side of the power converter via AC switches and connected to the DC side of the power converter via circuit breakers, wherein a DC link circuit of the power converter is chargeable from the AC supply grid via an AC precharging circuit. The power converter has an insulation monitor to measure the insulation resistance of the DC side when the AC precharging circuit is connected to the DC link circuit. The disclosure also includes a related method.

公开(公告)号：US11067638B2

公开(公告)日：2021-07-20

申请号：US16711578

申请日：2019-12-12

Applicant: SMA Solar Technology AG

Inventor： Marcel Kratochvil ,  Raimund Thiel ,  Rainer Schmitt

IPC: G01R31/40 ,  H02H1/00

Abstract: A method of detecting a serial arc fault in a DC-power circuit includes injecting an RF-signal with a narrow band-width into the DC-power circuit and measuring a response signal related to the injected RF-signal in the DC-power circuit. The method further includes determining a time derivative of the response signal, analyzing the time derivative, and signaling an occurrence of a serial arc fault in the power circuit based on the results of the analysis. A system for detecting an arc fault is configured to perform a method as described before.

公开(公告)号：US20210181264A1

公开(公告)日：2021-06-17

申请号：US16711578

申请日：2019-12-12

Applicant: SMA Solar Technology AG

Inventor： Marcel Kratochvil ,  Raimund Thiel ,  Rainer Schmitt

IPC: G01R31/40 ,  H02H1/00

Abstract: A method of detecting a serial arc fault in a DC-power circuit includes injecting an RF-signal with a narrow band-width into the DC-power circuit and measuring a response signal related to the injected RF-signal in the DC-power circuit. The method further includes determining a time derivative of the response signal, analyzing the time derivative, and signaling an occurrence of a serial arc fault in the power circuit based on the results of the analysis. A system for detecting an arc fault is configured to perform a method as described before.

公开(公告)号：US09625516B2

公开(公告)日：2017-04-18

申请号：US13729234

申请日：2012-12-28

Applicant: SMA Solar Technology AG

Inventor： Markus Hopf ,  Holger Behrends ,  Gerd Bettenwort ,  Sebastian Bieniek ,  Marcel Kratochvil

IPC: G01R31/26 ,  G08B13/14 ,  H02S50/10

CPC classification number: G01R31/2642 ,  G08B13/1409 ,  H02S50/10

Abstract: A device and corresponding method for monitoring a photovoltaic system to detect an occurrence of events impairing normal operation of the photovoltaic system is provide. The photovoltaic system includes a photovoltaic generator including a first group of photovoltaic modules and a second group of photovoltaic modules being different from the first group. The device includes a first and a second pair of coupling means, both pairs including signal coupling-in means for coupling a test signal into the photovoltaic generator, and a signal coupling-out means for coupling out a response signal from the photovoltaic generator, the first pair of coupling means configured to selectively detect the occurrence of the events in the first group of photovoltaic modules, and the second pair of coupling means configured to selectively detect the occurrence of the events in the second group of photovoltaic modules.