公开(公告)号：US09479044B1

公开(公告)日：2016-10-25

申请号：US14585994

申请日：2014-12-30

Applicant: Google Inc.

Inventor： Anand Ramesh ,  Subhrajit Roychowdhury

IPC: H02M1/12 ,  H02M1/32 ,  G08C19/00 ,  G05F1/70

CPC classification number: H02M1/12 ,  G05F1/70 ,  G08C19/00 ,  H02M1/126 ,  H02M1/32 ,  H02M7/493

Abstract: Methods, systems, and apparatus, including computer program products for structured content ranking. In an aspect, a method includes, receiving, at a controller, an alternating current signal; determining harmonic values that describe a fundamental frequency component of the alternating current signal and harmonic components of the alternating current signal; accessing, by the controller, control data that defines a relation of harmonic values to operational instructions, wherein each operational instruction, when supplied to an inverter, causes the inverter to perform an operation defined by the operational instruction; selecting, by the controller, an operational instruction from the operational instructions, the selected operational instruction based on the harmonic values and the control data; and providing, by the controller, the selected operational instruction to the inverter to cause the inverter to perform the operation defined by the selected operational instruction.

Abstract translation: 方法，系统和设备，包括用于结构化内容排名的计算机程序产品。 在一方面，一种方法包括：在控制器处接收交流信号; 确定描述交流信号的基频分量和交流信号的谐波分量的谐波值; 由控制器访问定义谐波值与操作指令的关系的控制数据，其中当提供给逆变器时，每个操作指令使逆变器执行由操作指令定义的操作; 由所述控制器选择来自所述操作指令的操作指令，所述选择的操作指令基于所述谐波值和所述控制数据; 以及通过所述控制器将所选择的操作指令提供给所述逆变器以使所述逆变器执行由所选择的操作指令定义的操作。

公开(公告)号：US09712040B1

公开(公告)日：2017-07-18

申请号：US14586059

申请日：2014-12-30

Applicant: Google Inc.

Inventor： Sangsun Kim ,  Srinivasa Murthy Salapaka ,  Murti V. Salapaka ,  Subhrajit Roychowdhury

IPC: H02J3/46 ,  H02M1/12 ,  H02M7/44

CPC classification number: H02M1/12 ,  H02M7/44 ,  H02M7/493

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for shaping grid currents output from parallel inverters in a power distribution system with virtual impedances. In one aspect, a method includes receiving a measurement of the current output from the inverter, processing the measurement of the current to extract a first current component having a particular frequency, obtaining a second current component based on the measurement of the current and the extracted first current component, weighing the first and second current components with respective first and second impedances to obtain respective first and second component voltages, the first impedance having a lower impedance amplitude than the second impedance, obtaining a shaped voltage based on the first and second component voltages, and outputting a control signal to the inverter, the control signal causing the inverter to output the shaped voltage to the power distribution bus.