公开(公告)号：US20120019964A1

公开(公告)日：2012-01-26

申请号：US12842111

申请日：2010-07-23

Applicant: Richard T. West

Inventor： Richard T. West

IPC: H02H3/00 ,  H05K7/14

CPC classification number: H02H7/205 ,  H02H3/16

Abstract: An electrical power converter for converting power from a bipolar DC source to supply an AC load is disclosed. For one such embodiment the bipolar DC source is a photovoltaic array and the AC power is sourced into an electric power grid. The bipolar photovoltaic array has positive and negative voltage potentials with respect to earth ground. The converter is a utility interactive inverter which does not require an isolation transformer at the electric power grid interface. Embodiments of the invention include methods of detecting and interrupting DC ground faults in the photovoltaic array.

Abstract translation: 公开了一种用于将来自双极型直流电源的电力转换为提供交流负载的电力转换器。 对于一个这样的实施例，双极性直流电源是光伏阵列，并且AC电力来源于电力网。 双极光伏阵列相对于地面具有正和负电压电位。 该转换器是一种实用的交互式逆变器，在电力电网接口上不需要隔离变压器。 本发明的实施例包括检测和中断光伏阵列中的DC接地故障的方法。

公开(公告)号：US07710752B2

公开(公告)日：2010-05-04

申请号：US11308896

申请日：2006-05-23

Applicant: Rick West

Inventor： Rick West

IPC: H02M7/493

CPC classification number: H02M7/493 ,  H02M1/12 ,  H02M7/501 ,  H02M2001/007 ,  Y02E10/56 ,  Y10S323/906

Abstract: An electrical DC-to-AC power conversion apparatus is disclosed that is primarily intended for use with solar photovoltaic sources in electric utility grid-interactive applications. The invention improves the conversion efficiency and lowers the cost of DC-to-AC inverters. The enabling technology is a novel inverter circuit topology, where the bulk of the throughput power, from DC source to AC utility, is processed only once. The inverter does not require an isolation transformer and can be connected directly to a 480/277 Vac utility grid. The invention also allows the power converter to start into photovoltaic array having higher open circuit voltages. The invention also uses active ripple current cancellation to substantially reduce the cost, size and weight of the main filter inductors.

Abstract translation: 公开了一种主要用于电力电网交互应用中的太阳能光伏源的电DC-AC电力转换装置。 本发明提高了转换效率并降低了DC-AC逆变器的成本。 启用技术是一种新颖的逆变器电路拓扑，其中从DC源到AC电力的大部分吞吐量功率只被处理一次。 变频器不需要隔离变压器，可直接与480/277 Vac电网连接。 本发明还允许功率转换器开始具有较高开路电压的光伏阵列。 本发明还使用主动纹波电流消除来显着降低主滤波电感器的成本，尺寸和重量。

公开(公告)号：US20100088052A1

公开(公告)日：2010-04-08

申请号：US12247534

申请日：2008-10-08

Applicant: Jun Yin ,  Renjie Xu

Inventor： Jun Yin ,  Renjie Xu

IPC: G01R27/00

CPC classification number: H02H7/1222 ,  G01R31/42

Abstract: A sensor-less technique is described for detecting the status of an AC contactor of a power inverter. In one embodiment, a method is provided of sensing an unexpected condition of an AC contactor used to couple to a power distribution system a power inverter having at least one power conductor. The method includes determining a voltage value for the conductor; determining a current value for the conductor; determining a phase difference using the voltage value and the current value; and monitoring successive values of the phase difference to produce a monitoring result. Depending on the monitoring result, a determination is made whether or not to issue an alert signal. Control routines embodying such technique may be stored on computer-readable media. A power inverter using such technique is described.

Abstract translation: 描述了一种无传感器技术来检测电力逆变器的交流接触器的状态。 在一个实施例中，提供了一种用于感测用于耦合到配电系统的具有至少一个电力导体的功率逆变器的AC接触器的意外状况的方法。 该方法包括确定导体的电压值; 确定导体的当前值; 使用电压值和电流值确定相位差; 并监视相位差的连续值以产生监视结果。 根据监视结果，确定是否发出警报信号。 体现这种技术的控制程序可以存储在计算机可读介质上。 描述使用这种技术的电力逆变器。

公开(公告)号：US07667610B2

公开(公告)日：2010-02-23

申请号：US11797584

申请日：2007-05-04

Applicant: Christopher Scott Thompson

Inventor： Christopher Scott Thompson

IPC: G08B21/00

CPC classification number: H01L31/02021 ,  H02S50/10 ,  Y02E10/50

Abstract: A method and apparatus for producing an indication of solar panel condition is disclosed. The method involves receiving operating condition signals including an irradiance signal representing electromagnetic radiation received by the solar panel, and an age signal representing age of the solar panel. The method also involves receiving a power signal representing actual power output from the solar panel and producing a power estimate in response to the operating condition signals and irradiance and age adjustment factors. The power estimate represents an expected power output from the solar panel and the adjustment factors are for adjusting the irradiance signal and the age signal respectively. The method further involves causing a warning signal to be generated in response to a difference between the power signal and the power estimate.

Abstract translation: 公开了一种用于产生太阳能电池板状况指示的方法和装置。 该方法包括接收包括表示由太阳能电池板接收的电磁辐射的辐照度信号的操作状态信号和表示太阳能电池板的年龄的年龄信号。 该方法还包括接收表示来自太阳能电池板的实际功率输出的功率信号，并响应于操作条件信号和辐照度和年龄调节因子产生功率估计。 功率估计表示来自太阳能电池板的预期功率输出，并且调节因子分别用于调节辐照度信号和年龄信号。 该方法还包括响应于功率信号和功率估计之间的差异而产生警告信号。

公开(公告)号：US20090184695A1

公开(公告)日：2009-07-23

申请号：US12028739

申请日：2008-02-08

Applicant: Adam Mocarski

Inventor： Adam Mocarski

IPC: G06F17/18 ,  G05F1/10

CPC classification number: G06F17/10

Abstract: A system and method for computing a Root Mean Square (RMS) value of digitized samples is disclosed. Discrete digital representations of a continuous analog electrical signal are produced. The discrete digital representations are received by a digital computation module, wherein the digital computation module is configured to perform a division operation and a square root operation for the RMS computation in one combined algorithm.

Abstract translation: 公开了一种用于计算数字化样本的均方根（RMS）值的系统和方法。 产生连续模拟电信号的离散数字表示。 离散数字表示由数字计算模块接收，其中数字计算模块被配置为在一个组合算法中对RMS计算执行除法运算和平方根运算。

公开(公告)号：US07432691B2

公开(公告)日：2008-10-07

申请号：US11504541

申请日：2006-08-14

Applicant: Henry H. Cutler

Inventor： Henry H. Cutler

IPC: G05F1/40 ,  G05F5/00 ,  H02J3/00

CPC classification number: H02J3/383 ,  H02J3/385 ,  Y02E10/563 ,  Y02E10/58

Abstract: Methods, apparatus, media and signals for controlling power drawn from an energy converter to supply a load, where the energy converter is operable to convert energy from a physical source into electrical energy. Power drawn from the energy converter is changed when a supply voltage of the energy converter meets a criterion. The criterion and the change in the amount of power drawn from the energy converter are dependent upon a present amount of power supplied to the load. The methods, apparatus, media and signals described herein may provide improvements to DC to AC maximum power point tracking in an energy conversion system such as a photovoltaic power generation system.

Abstract translation: 用于控制从能量转换器提取负载的功率的方法，装置，介质和信号，其中所述能量转换器可操作以将来自物理源的能量转换为电能。 当能量转换器的电源电压满足标准时，从能量转换器获取的功率改变。 从能量转换器获取的功率量的标准和变化取决于供应给负载的当前功率量。 本文描述的方法，装置，介质和信号可以提供对诸如光伏发电系统的能量转换系统中的DC到AC最大功率点跟踪的改进。

公开(公告)号：US20080106921A1

公开(公告)日：2008-05-08

申请号：US12006472

申请日：2008-01-02

Applicant: Arthur Dickerson ,  Rick West

Inventor： Arthur Dickerson ,  Rick West

IPC: H02M7/537

CPC classification number: H02J7/35 ,  H02M7/537 ,  Y02E10/566 ,  Y02E10/58

Abstract: An apparatus and method of control for converting DC (direct current) power from a solar photovoltaic source to AC (alternating current) power. A novel DC-to-AC power converter topology and a novel control method are disclosed. This combination of topology and control are very well suited for photovoltaic microinverter applications. Also, a novel variant of this control method is illustrated with a number of known photovoltaic DC-to-AC power converter topologies. The primary function of both control methods is to seek the maximum power point (MPP) of the photovoltaic source with novel, iterative, perturb and observe control algorithms. The control portion of this invention discloses two related control methods, both an improvement over prior art by having greatly improved stability, dynamic response and accuracy.

Abstract translation: 用于将来自太阳能光伏源的DC（直流）功率转换为AC（交流）功率的装置和方法。 公开了一种新颖的DC-AC电源转换器拓扑结构和新颖的控制方法。 拓扑和控制的这种组合非常适合于光伏微逆变器应用。 此外，该控制方法的新颖变型用许多已知的光伏DC-AC电力变换器拓扑结构示出。 两种控制方法的主要功能是利用新颖，迭代，扰动和观察控制算法寻求光伏源的最大功率点（MPP）。 本发明的控制部分公开了两种相关的控制方法，即通过大大提高稳定性，动态响应和精度来改进现有技术。

公开(公告)号：USD507528S1

公开(公告)日：2005-07-19

申请号：US29216991

申请日：2004-11-12

Applicant: Alexander Jeffrey Feldman ,  Wing-Bun Lowe

Designer： Alexander Jeffrey Feldman ,  Wing-Bun Lowe