公开(公告)号：US20080204044A1

公开(公告)日：2008-08-28

申请号：US12076397

申请日：2008-03-18

申请人： Srinivas Ponnaluri ,  Beat Ronner

发明人： Srinivas Ponnaluri ,  Beat Ronner

IPC分类号： G01R27/04

CPC分类号： H02J3/38 ,  H02J2003/388

摘要： An exemplary method comprises the steps of introducing a reactive current reference square wave, detecting load voltage changes at every change in the reactive current reverence wave, and determining whether the detected load voltage changes exceed a predefined islanding detection threshold value, indicating a loss of mains and an islanding operation of the power generator. With the exemplary loss-of-mains detection, islanding can be detected within a shortest period of time, even if the local islands active and reactive load matches exactly the distributed generators active and reactive power generation. So even without a sudden voltage change, unintentional islanding can immediately be detected and control electronics can safely turn of the distributed power generator.

摘要翻译： 一种示例性方法包括以下步骤：引入无功电流参考方波，检测无功电流回波中的每个变化时的负载电压变化，以及确定检测到的负载电压变化是否超过预定义的孤岛检测阈值，指示电力损失 和发电机的孤岛作战。 通过示例的电源损耗检测，即使局部岛有功和无功负载恰好匹配分布式发电机的有功和无功发电，也可以在最短的时间内检测孤岛。 所以即使没有突然的电压变化，也可以立即检测到无意的孤岛，并且控制电子装置可以安全地转动分布式发电机。

公开(公告)号：US07450405B2

公开(公告)日：2008-11-11

申请号：US11878418

申请日：2007-07-24

申请人： Srinivas Ponnaluri ,  Leonardo Serpa

发明人： Srinivas Ponnaluri ,  Leonardo Serpa

IPC分类号： H02M1/12

CPC分类号： H02M1/12 ,  H02M7/53875 ,  H02M2007/53876

摘要： A method is disclosed for operating a converter circuit, with the converter circuit having a converter unit with a plurality of drivable power semiconductor switches and an LCL filter connected to each phase connection of the converter unit, in which the drivable power semiconductor switches are driven by means of a drive signal which is formed from a hysteresis power value, from a hysteresis wattless-component value and from a selected flux sector. An apparatus for carrying out the method is also disclosed.

摘要翻译： 公开了一种用于操作转换器电路的方法，其中转换器电路具有转换器单元，其具有多个可驱动功率半导体开关和连接到转换器单元的每个相位连接的LCL滤波器，其中可驱动功率半导体开关由 由迟滞功率值，滞后无功分量值和选定的通量扇区形成的驱动信号的装置。 还公开了一种用于执行该方法的装置。

公开(公告)号：US20080211464A1

公开(公告)日：2008-09-04

申请号：US12062151

申请日：2008-04-03

申请人： Srinivas Ponnaluri ,  Peter Steimer

发明人： Srinivas Ponnaluri ,  Peter Steimer

IPC分类号： G05F1/70

CPC分类号： H02M7/493

摘要： A converter unit is disclosed which produces an output voltage based on reference signals (u*d, u*q) that are generated from active and reactive components (P, Q) of the converter's output power. A first reference signal for a reactive component of the output voltage (u*q) is set to zero, thus regulating the reactive component of the output voltage to zero. Therefore, only the active component is contributing to the actual output voltage. The reference signal for the active component of the output voltage (u*d) is produced based on the active power component (P) with an active power vs. active voltage droop. To synchronize the frequencies of multiple converter units, a reactive power vs. frequency droop can be introduced for each converter unit, regulating the frequency based on changes in the reactive power component (Q) of each converter unit.

摘要翻译： 公开了一种转换器单元，其基于从有功和无功分量（P，Q）产生的参考信号（u *，d *，q * q）产生输出电压， 的转换器输出功率。 将输出电压（u * ）的无功分量的第一参考信号设置为零，从而将输出电压的无功分量调整为零。 因此，只有有源元件有助于实际的输出电压。 基于具有有功功率与有功电压下降的有功功率分量（P）来产生输出电压的有源分量（u * SUB）的参考信号。 为了同步多个转换器单元的频率，可以为每个转换器单元引入无功功率与频率下降，基于每个转换器单元的无功功率分量（Q）的变化来调节频率。

公开(公告)号：US20080007974A1

公开(公告)日：2008-01-10

申请号：US11878418

申请日：2007-07-24

申请人： Srinivas Ponnaluri ,  Leonardo Serpa

发明人： Srinivas Ponnaluri ,  Leonardo Serpa

IPC分类号： H02M3/335

CPC分类号： H02M1/12 ,  H02M7/53875 ,  H02M2007/53876

摘要： A method is disclosed for operating a converter circuit, with the converter circuit having a converter unit with a plurality of drivable power semiconductor switches and an LCL filter connected to each phase connection of the converter unit, in which the drivable power semiconductor switches are driven by means of a drive signal which is formed from a hysteresis power value, from a hysteresis wattless-component value and from a selected flux sector. An apparatus for carrying out the method is also disclosed.

摘要翻译： 公开了一种用于操作转换器电路的方法，其中转换器电路具有转换器单元，其具有多个可驱动功率半导体开关和连接到转换器单元的每个相位连接的LCL滤波器，其中可驱动功率半导体开关由 由迟滞功率值，滞后无功分量值和选定的通量扇区形成的驱动信号的装置。 还公开了一种用于执行该方法的装置。

公开(公告)号：US07973427B2

公开(公告)日：2011-07-05

申请号：US12201493

申请日：2008-08-29

申请人： Petr Korba ,  Rudolf Wieser ,  Srinivas Ponnaluri ,  Mats Larsson ,  Alexandre Oudalov ,  Jose Taborda ,  Peter Steimer

发明人： Petr Korba ,  Rudolf Wieser ,  Srinivas Ponnaluri ,  Mats Larsson ,  Alexandre Oudalov ,  Jose Taborda ,  Peter Steimer

IPC分类号： H01J1/10

CPC分类号： H02J3/00 ,  H02J3/24 ,  Y02E60/728 ,  Y04S10/265 ,  Y10T307/50

摘要： The disclosure relates to a converter control unit or power system stabilizing unit for counteracting oscillations in electric power systems that is equipped and employed to provide and processes information for system-wide monitoring, protection, control and metering. It comprises means for synchronized (e.g. via GPS or another absolute/global time reference) sampling of voltages and/or currents, means for down-sampling in order to decrease the number of samples, and means for calculating phasors, i.e. time stamped amplitude and phase angle of the voltages and/or currents.

摘要翻译： 本公开涉及一种用于抵消电力系统中的振荡的转换器控制单元或电力系统稳定单元，其被配备并用于提供和处理用于系统范围监视，保护，控制和计量的信息。 它包括用于同步（例如通过GPS或另一绝对/全局时间参考）电压和/或电流的采样的装置，用于下采样的装置以减少采样数量，以及用于计算相量的装置，即时间戳幅度和 电压和/或电流的相位角。

公开(公告)号：US07778052B2

公开(公告)日：2010-08-17

申请号：US12403059

申请日：2009-03-12

申请人： Leonardo Serpa ,  Srinivas Ponnaluri

发明人： Leonardo Serpa ,  Srinivas Ponnaluri

IPC分类号： H02M1/12 ,  H02M5/42

CPC分类号： H02M1/12 ,  H02M7/53875 ,  H02P27/08

摘要： A method is disclosed for the operation of a converter circuit, wherein the converter circuit has a converter unit having a multiplicity of actuatable power semiconductor switches and an LCL filter which is connected to each phase connection of the converter unit, in which the actuatable power semiconductor switches are actuated by means of an actuation signal (S) formed from a hysteresis active power value (dP), from a hysteresis reactive power value (dQ) and from a selected flux sector (θn). The hysteresis active power value (dP) is formed from a differential active power value (Pdiff). In addition, the hysteresis reactive power value (dQ) is formed from a differential reactive power value (Qdiff). An apparatus for carrying out the method is also disclosed.

摘要翻译： 公开了一种用于转换器电路的操作的方法，其中转换器电路具有转换器单元，其具有多个可致动功率半导体开关和连接到转换器单元的每个相位连接的LCL滤波器，其中可致动功率半导体 开关通过从滞后有功功率值（dP），滞后无功功率值（dQ）和所选择的通量扇区（＆amp; n）形成的致动信号（S）来致动。 滞后有功功率值（dP）由差分有功功率值（Pdiff）形成。 此外，滞后无功功率值（dQ）由差分无功功率值（Qdiff）形成。 还公开了一种用于执行该方法的装置。

公开(公告)号：US20070121348A1

公开(公告)日：2007-05-31

申请号：US10583315

申请日：2004-12-13

申请人： Srinivas Ponnaluri ,  Jurgen Steinke ,  Peter Steimer

发明人： Srinivas Ponnaluri ,  Jurgen Steinke ,  Peter Steimer

IPC分类号： H02M3/335

CPC分类号： H02M5/4585 ,  H02M7/49

摘要： A converter circuit having a first and a second converter element is specified, with each converter element having a DC voltage circuit and in each case one converter element phase (u1, v1, w1) of the first converter element being connected to a respective converter element phase (u2, v2, w2) of the second converter element. Furthermore, a transformer is provided, with the secondary windings of the transformer being connected to the connected converter element phases (u1, v1, w1, u2, v2, w2) of the first and second converter elements. In order to ensure that virtually no amplitude components relating to the switching frequency of the converter circuit occur during its operation in the output currents of the converter circuit and in the output voltages of the converter circuit, one secondary winding is in each case connected in series in each connection of one converter element phase (u1, v1, w1) of the first converter element to one converter element phase (u2, v2, w2) of the second converter element, in which case each secondary winding is formed by two winding elements connected in series with one another, with the junction point of the two winding elements forming a neutral-point connection, and two filter capacitors which are connected in series with one another are in each case connected in parallel with each secondary winding.

摘要翻译： 规定具有第一和第二转换器元件的A转换器电路，其中每个转换器元件具有DC电压电路，并且在每种情况下，第一转换器元件的一个转换元件相位（u 1，v 1，w 1）连接到 各个转换器元件相位（u 2，v 2，w 2）。 此外，提供了一种变压器，其中变压器的次级绕组连接到第一和第二转换器元件的连接的转换器元件相（u 1，v 1，w 1，u 2，v 2，w 2）。 为了确保在转换器电路的输出电流和转换器电路的输出电压期间实际上没有发生与转换器电路的开关频率相关的幅度分量，一个次级绕组在每种情况下串联连接 在第一转换器元件的一个转换元件相位（u 1，v 1，w 1）与第二转换器元件的一个转换器元件相位（u 2，v 2，w 2）的连接中，在这种情况下，每个次级绕组 由彼此串联连接的两个绕组元件形成，两个绕组元件的连接点形成中性点连接，并且彼此串联连接的两个滤波电容器在每个情况下与每个相互并联连接 次级绕组。

公开(公告)号：US07639515B2

公开(公告)日：2009-12-29

申请号：US12222042

申请日：2008-07-31

申请人： Srinivas Ponnaluri ,  Christoph Häderli

发明人： Srinivas Ponnaluri ,  Christoph Häderli

IPC分类号： H02M3/24 ,  H02M5/42 ,  H02M7/44

CPC分类号： H02M7/487 ,  H02M2007/4835

摘要： A switchgear cell is disclosed having a first energy store and a second energy store connected in series therewith, having a first, second, third and fourth power semiconductor switch, which are connected in series, wherein the first, second, third and fourth power semiconductor switch are in each case one drivable bidirectional power semiconductor switch with a controlled unidirectional current-conducting direction. The first power semiconductor switch is connected to the first energy store, and the fourth power semiconductor switch is connected to the second energy store. A third energy store is connected to the junction between the first and the second power semiconductor switch and the junction between the third and the fourth power semiconductor switch.

摘要翻译： 公开了具有与串联连接的第一能量存储器和第二能量存储器的开关柜，其具有串联连接的第一，第二，第三和第四功率半导体开关，其中第一，第二，第三和第四功率半导体 开关在每种情况下都是一个具有受控单向导流方向的可驱动的双向功率半导体开关。 第一功率半导体开关连接到第一能量存储器，并且第四功率半导体开关连接到第二能量存储器。 第三能量存储器连接到第一和第二功率半导体开关之间的结以及第三和第四功率半导体开关之间的结。

公开(公告)号：US07518893B2

公开(公告)日：2009-04-14

申请号：US11826480

申请日：2007-07-16

申请人： Srinivas Ponnaluri ,  Jürgen Steinke

发明人： Srinivas Ponnaluri ,  Jürgen Steinke

IPC分类号： H02M3/06 ,  H02M5/275

CPC分类号： H02M7/53871 ,  H02J7/345 ,  H02M1/12 ,  H02M3/158

摘要： A method for operation of a converter circuit is specified, wherein the converter circuit has a converter unit with a multiplicity of drivable power semiconductor switches and an LCL filter which is connected to each phase connection of the converter unit, in which method the drivable power semiconductor switches are driven by means of a drive signal which is formed from reference voltages. The reference voltages are formed by subtraction of damping voltages from reference-phase connection voltages, with the damping voltages being formed from filter capacitance currents, weighted with a variable damping factor of the LCL filter. An apparatus for carrying out the method is also specified.

摘要翻译： 规定了转换器电路的操作方法，其中转换器电路具有多个可驱动功率半导体开关的转换器单元和连接到转换器单元的每个相位连接的LCL滤波器，其中可驱动功率半导体 开关通过由参考电压形成的驱动信号驱动。 参考电压通过从参考相位连接电压中减去阻尼电压形成，阻尼电压由滤波器电容电流形成，并用LCL滤波器的可变阻尼因子加权。 还指定了用于执行该方法的装置。

公开(公告)号：US20070263418A1

公开(公告)日：2007-11-15

申请号：US11826480

申请日：2007-07-16

申请人： Srinivas Ponnaluri ,  Jurgen Steinke

发明人： Srinivas Ponnaluri ,  Jurgen Steinke

IPC分类号： H02M1/12

CPC分类号： H02M7/53871 ,  H02J7/345 ,  H02M1/12 ,  H02M3/158

摘要： A method for operation of a converter circuit is specified, wherein the converter circuit has a converter unit with a multiplicity of drivable power semiconductor switches and an LCL filter which is connected to each phase connection of the converter unit, in which method the drivable power semiconductor switches are driven by means of a drive signal which is formed from reference voltages. The reference voltages are formed by subtraction of damping voltages from reference-phase connection voltages, with the damping voltages being formed from filter capacitance currents, weighted with a variable damping factor of the LCL filter. An apparatus for carrying out the method is also specified.

摘要翻译： 规定了转换器电路的操作方法，其中转换器电路具有多个可驱动功率半导体开关的转换器单元和连接到转换器单元的每个相位连接的LCL滤波器，其中可驱动功率半导体 开关通过由参考电压形成的驱动信号驱动。 参考电压通过从参考相位连接电压中减去阻尼电压形成，阻尼电压由滤波器电容电流形成，并用LCL滤波器的可变阻尼因子加权。 还指定了用于执行该方法的装置。