公开(公告)号：US07521914B2

公开(公告)日：2009-04-21

申请号：US12006472

申请日：2008-01-02

Applicant: Arthur F. Dickerson ,  Rick West

Inventor： Arthur F. Dickerson ,  Rick West

IPC: G05F1/40

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：US07411309B2

公开(公告)日：2008-08-12

申请号：US10554891

申请日：2004-05-03

Applicant: Raymond M. Hudson

Inventor： Raymond M. Hudson

IPC: H02P9/44

CPC classification number: F03D7/0272 ,  F03D9/255 ,  F05B2270/107 ,  F05B2270/337 ,  H02P9/007 ,  H02P9/102 ,  H02P9/46 ,  H02P27/05 ,  H02P2101/15 ,  Y02E10/723

Abstract: A controller (28) for a doubly fed induction generator (12,20) adjusts control signals to a rotor side converter (24) and line side converter (22) to adjust rotor current when a voltage transient on a utility grid (10) occurs, so that the doubly fed induction generator can ride through the transient. The controller can also turn off the transistors of the rotor side converter (24) to reduce rotor current and/or activate a crowbar (42) to reduce the voltage of the DC link (26) connecting the converters (22, 24) when significant voltage transients occur on the grid (10). This permits continued operation of the DFIG system without disconnecting from the grid.

Abstract translation: 用于双馈感应发电机（12,20）的控制器（28,20）在对公用电网（10）的电压瞬变发生时调节到转子侧转换器（24）和线路侧转换器（22）的调节信号，以调节转子电流 ，使得双馈感应发电机可以穿过瞬变。 控制器还可以关闭转子侧转换器（24）的晶体管，以减少转子电流和/或激活撬棒（42），以便在显着的时候降低连接转换器（22,24）的DC链路（26）的电压 电压瞬变发生在电网（10）上。 这允许DFIG系统的继续运行，而不断开电网。

公开(公告)号：US07319313B2

公开(公告)日：2008-01-15

申请号：US11161639

申请日：2005-08-10

Applicant: Arthur F. Dickerson ,  Rick West

Inventor： Arthur F. Dickerson ,  Rick West

IPC: G05F1/40

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.

公开(公告)号：US07215035B2

公开(公告)日：2007-05-08

申请号：US11063409

申请日：2005-02-22

Applicant: Raymond M. Hudson

Inventor： Raymond M. Hudson

IPC: H02P9/00

CPC classification number: H02P9/48 ,  F03D9/255 ,  H02J3/386 ,  H02P2101/15 ,  Y02E10/725 ,  Y02E10/763

Abstract: A method and apparatus for converting wind generated electricity to constant frequency electricity for supplying it to a utility grid. use a wind turbine generator having a doubly fed induction generator. Above the synchronous speed of the generator, the electricity from the rotor is converted to direct current (dc) electricity and the de electricity is converted back to alternating current (ac) electricity at a fixed unity power factor. Below synchronous speed, electricity flows to the rotor from the utility grid also at a fixed unity power factor. The current of the ac electricity is adjusted to be in phase with the utility grid voltage, wherein the ac electricity is maintained substantially at unity power factor.

Abstract translation: 一种用于将风力发电转换为恒定频率电力以将其供应到公用电网的方法和装置。 使用具有双馈感应发电机的风力发电机。 高于发电机的同步转速，来自转子的电力转换为直流（dc）电，直流电以固定的单位功率因数转换回交流电（AC）。 在同步速度以下，电力也以固定的单位功率因数从公用电网流向转子。 交流电的电流被调整为与公用电网电压同相，其中交流电基本维持在单位功率因数。

公开(公告)号：US20070040539A1

公开(公告)日：2007-02-22

申请号：US11504540

申请日：2006-08-14

Applicant: Henry Cutler

Inventor： Henry Cutler

IPC: G05F1/00

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

Abstract: A computer readable, 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电力的计算机可读介质和信号，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：US20060125449A1

公开(公告)日：2006-06-15

申请号：US11008266

申请日：2004-12-10

Applicant: Thomas Unger

Inventor： Thomas Unger

IPC: H02J7/00

CPC classification number: H02M1/4233 ,  H02J7/022 ,  Y02B40/90 ,  Y02B70/126

Abstract: A duty cycle controller apparatus for producing a duty cycle signal for controlling switching of switches of a battery charger having an AC input for receiving power and an output for supplying power to charge a battery in response to switching of the switches, while maintaining a high power factor at the AC input. The duty cycle controller apparatus includes a current command signal generator having a plurality of signal inputs for receiving a plurality of signals representing a plurality of operating conditions of the charger, a plurality of current command outputs and a processor operably configured to generate a plurality of current command signals at the current command outputs in response to respective sets of operating conditions.

公开(公告)号：US20130223113A1

公开(公告)日：2013-08-29

申请号：US13860993

申请日：2013-04-11

Applicant: Xantrex Technology, Inc.

Inventor： Richard T. West

IPC: H02M7/44

CPC classification number: H02M7/44 ,  H02H3/16 ,  H02H7/1222 ,  H02H7/20 ,  H02J3/38 ,  H02J3/383 ,  Y02E10/56 ,  Y02E10/563

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：US08467160B2

公开(公告)日：2013-06-18

申请号：US12530196

申请日：2007-03-06

Applicant: Richard T. West

Inventor： Richard T. West

IPC: H02H3/00

CPC classification number: H02M7/44 ,  H02H3/16 ,  H02H7/1222 ,  H02H7/20 ,  H02J3/38 ,  H02J3/383 ,  Y02E10/56 ,  Y02E10/563

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：US08159178B2

公开(公告)日：2012-04-17

申请号：US12545234

申请日：2009-08-21

Applicant: Emanuel Serban

Inventor： Emanuel Serban

IPC: H01M10/44 ,  H02J7/04

CPC classification number: G05F1/67 ,  H02M1/44 ,  Y02E10/58 ,  Y10S323/906

Abstract: A control strategy for distributed power generation modules in a power system that varies the line frequency or voltage according to a predetermined pattern to cause a PV inverter to modify its power output and thereby avoid overcharging a battery. When the power system operates in islanded mode, the AC load demand can be lower than the available energy from the PV array, causing the battery to become overcharged. To avoid this scenario, a hybrid inverter executes a pattern generator algorithm that varies the line frequency or voltage linearly, exponentially or any mathematical function or look-up tables. The PV inverter executes a pattern detection algorithm that detects the linear, exponential, or any mathematical function or look-up table change in the line frequency. In response, the PV inverter modifies its power output until an overcharging condition of the battery is removed. The line frequency/voltage can be varied within the anti-islanding limits.

Abstract translation: 一种用于根据预定模式改变线路频率或电压的电力系统中的分布式发电模块的控制策略，以使PV逆变器修改其功率输出，从而避免电池过度充电。 当电力系统工作在孤岛模式时，交流负载需求可能低于来自光伏阵列的可用能量，导致电池过充电。 为了避免这种情况，混合逆变器执行模式发生器算法，其线性地，指数地或任何数学函数或查找表改变线路频率或电压。 PV逆变器执行模式检测算法，其检测线路频率中的线性，指数或任何数学函数或查找表变化。 作为响应，PV逆变器修改其功率输出，直到电池的过充电状态被去除。 线路频率/电压可以在防孤岛极限内变化。

公开(公告)号：US20120074787A1

公开(公告)日：2012-03-29

申请号：US12892285

申请日：2010-09-28

Applicant: Rick West

Inventor： Rick West

IPC: H02J1/10

CPC classification number: H02H7/20 ,  H02H3/05 ,  H02H3/08 ,  Y10T307/696

Abstract: A combiner circuit and voltage protection circuit is disclosed. A plurality of photovoltaic sources is provided. A set of fuses, each having one side coupled to one of the plurality of photovoltaic sources is provided. A set of contacts, each having one side coupled to the other side of one of the fuses is provided. The other side of the contacts are coupled together to combine the output of the photovoltaic sources to an output interface, the output interface being coupled to the load. A set of diodes are each coupled to each of the set of fuses and form a current path around the set of contacts. A transistor is coupled to each of the diodes and the load interface. The transistor has an on state completing the flow of current through the diodes around the set of contacts to the load interface.

Abstract translation: 公开了组合器电路和电压保护电路。 提供多个光源。 提供了一组熔丝，每组熔丝具有耦合到所述多个光伏源之一的一侧。 提供了一组触点，每个触点具有联接到一个保险丝的另一侧的一侧。 触点的另一侧耦合在一起以将光伏源的输出组合到输出接口，输出接口耦合到负载。 一组二极管各自耦合到该组熔丝中的每一个并且形成围绕该组触点的电流路径。 晶体管耦合到每个二极管和负载接口。 晶体管具有导通状态，其完成了通过该组触点周围的二极管流到负载接口的电流。