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1. 发明授权

US08730702B2 Very high efficiency three phase power converter 有权
标题翻译：超高效三相电源转换器
公开(公告)号：US08730702B2
公开(公告)日：2014-05-20
申请号：US12715372
申请日：2010-03-01
申请人： Michael Joseph Stern
发明人： Michael Joseph Stern
IPC分类号： H02M7/5387
CPC分类号： H02M7/5395 , H02M2001/0048 , Y02B70/1491 , Y02E10/56
摘要： A DC-to-AC power converter is disclosed which provides current regulated three-phase AC outputs and very high conversion efficiencies. The converter sinks power from an external DC current source and steers that current directly into two phases of a three-phase load by using complementary semiconductor switches in disparate half-bridges of a six-pole bridge. The steering switch selection rotates every 60° to direct current into the two phases with the largest voltage differential at any given time. The remaining half-bridge acts as a high-frequency, bi-directional current source to balance the three-phase load currents. This topology and control method significantly reduces power conversion losses. Prior art converters first convert “soft” DC sources to voltage sources and then to AC current sources. The invention eliminates the need for large filter inductors and DC bus capacitors used in prior art converters. The invention is optimized for photovoltaic, utility-grid-interactive applications.
摘要翻译：公开了一种DC-AC电力转换器，其提供电流调节的三相AC输出和非常高的转换效率。转换器通过在六极桥的不同半桥中使用互补半导体开关，从外部直流电流源吸收功率并将该电流直接引导到三相负载的两相。转向开关选择每60°旋转一次，在任何给定时间将电流引导到具有最大电压差的两相。剩余的半桥充当高频，双向电流源，以平衡三相负载电流。这种拓扑和控制方法显着降低了电源转换损耗。现有技术的转换器首先将“软”DC源转换成电压源，然后转换成AC电流源。本发明消除了对现有技术转换器中使用的大型滤波电感器和直流总线电容器的需要。本发明针对光伏，公用事业电网交互应用进行了优化。

2. 发明申请

US20100237703A1 PHOTOVOLTAIC POWER PLANT WITH MINIMIZED POWER COLLECTION LOSSES 有权
标题翻译：具有最小功率收集损失的光伏发电厂
公开(公告)号：US20100237703A1
公开(公告)日：2010-09-23
申请号：US12723670
申请日：2010-03-14
申请人： Michael Joseph Stern
发明人： Michael Joseph Stern
IPC分类号： H02J3/00
CPC分类号： H02J1/10 , H02S10/00 , H02S40/34 , Y02E10/50 , Y10T307/685
摘要： A photovoltaic power plant design is disclosed where a two-tier DC power collection method is used in concert with specific array field geometries and equipment locations to minimize system wiring costs and/or resistive wiring losses.
摘要翻译：公开了一种光伏发电厂设计，其中使用两层直流电力收集方法与特定阵列场几何和设备位置一致，以最小化系统布线成本和/或电阻布线损耗。

3. 发明授权

US08648497B2 Photovoltaic power plant with distributed DC-to-DC power converters 有权
标题翻译：具有分布式DC-DC电源转换器的光伏发电厂
公开(公告)号：US08648497B2
公开(公告)日：2014-02-11
申请号：US12656378
申请日：2010-01-28
申请人： Michael Joseph Stern
发明人： Michael Joseph Stern
IPC分类号： H02J1/00 , G05F1/00
CPC分类号： H02M7/5387 , H02M2001/007 , Y02E10/56 , Y10T307/707
摘要： A solar photovoltaic plant is disclosed where a number of distributed DC-to-DC converters are used in conjunction with a central DC-to-AC converter. Each DC-to-DC converter is dedicated to a portion of the photovoltaic array and tracks the maximum power point voltage thereof. The DC-to-DC converters also boost the photovoltaic voltage and regulate a DC output current for transmission to the central DC-to-AC converter. Five distinct advantages are had over the prior art. First, efficiencies in intra-field power collection are greatly improved by transferring power at higher DC voltages. Second, the number of independent photovoltaic maximum power point trackers in the power plant can be increased, in a cost effective manner, to optimize the overall photovoltaic array energy harvest. Third, each DC-to-DC converter output “looks” like a current source at the input of the DC-to-AC converter and therefore can be easily paralleled. Fourth, the current source nature of the DC-to-DC converter outputs enables the DC-to-AC converter to operate with a minimum, fixed DC bus voltage to provide maximum DC-to-AC power conversion efficiencies. And fifth, each distributed DC-to-DC converter can isolate a faulted portion of the photovoltaic array while the remainder of the array continues producing power.
摘要翻译：公开了一种太阳能光伏电站，其中多个分布式DC-DC转换器与中央DC-AC转换器结合使用。每个DC-DC转换器专用于光伏阵列的一部分并跟踪其最大功率点电压。 DC-DC转换器还提高光伏电压并调节直流输出电流以传输到中央DC-AC转换器。与现有技术相比有五个明显的优点。首先，通过在较高的直流电压下传递功率，大大提高了场内功率收集的效率。二是可以以成本效益的方式提高发电厂独立光伏最大功率点追踪器的数量，优化整体光伏阵列的能量收获。第三，每个DC-DC转换器输出“看起来”像DC-AC转换器的输入端的电流源，因此可以容易地并联。第四，DC-DC转换器输出的电流源性质使得DC-AC转换器能够以最小的固定DC总线电压工作，以提供最大的DC-AC功率转换效率。第五，每个分布式DC-DC转换器可以隔离光伏阵列的故障部分，而阵列的其余部分继续产生功率。

4. 发明授权

US08344548B2 Photovoltaic power plant with minimized power collection losses 有权
标题翻译：光伏发电厂的集电损耗最小化
公开(公告)号：US08344548B2
公开(公告)日：2013-01-01
申请号：US12723670
申请日：2010-03-14
申请人： Michael Joseph Stern
发明人： Michael Joseph Stern
IPC分类号： H02J1/00 , H02J3/00
CPC分类号： H02J1/10 , H02S10/00 , H02S40/34 , Y02E10/50 , Y10T307/685
摘要： A photovoltaic power plant design is disclosed where a two-tier DC power collection method is used in concert with specific array field geometries and equipment locations to minimize system wiring costs and/or resistive wiring losses.
摘要翻译：公开了一种光伏发电厂设计，其中使用两层直流电力收集方法与特定阵列场几何和设备位置一起使用，以最小化系统布线成本和/或电阻布线损耗。

5. 发明申请

US20100226159A1 Very High Efficiency Three Phase Power Converter 有权
标题翻译：超高效三相电源转换器
公开(公告)号：US20100226159A1
公开(公告)日：2010-09-09
申请号：US12715372
申请日：2010-03-01
申请人： Michael Joseph Stern
发明人： Michael Joseph Stern
IPC分类号： H02M7/5387
CPC分类号： H02M7/5395 , H02M2001/0048 , Y02B70/1491 , Y02E10/56
摘要： A DC-to-AC power converter is disclosed which provides current regulated three-phase AC outputs and very high conversion efficiencies. The converter sinks power from an external DC current source and steers that current directly into two phases of a three-phase load by using complementary semiconductor switches in disparate half-bridges of a six-pole bridge. The steering switch selection rotates every 60° to direct current into the two phases with the largest voltage differential at any given time. The remaining half-bridge acts as a high-frequency, bi-directional current source to balance the three-phase load currents. This topology and control method significantly reduces power conversion losses. The converter may also include an additional power processing stage that is used to convert an external DC voltage source to a DC current source before the three-phase conversion takes place. Prior art converters first convert “soft” DC sources to voltage sources and then to AC current sources. The invention eliminates the need for large PWM filter inductors and DC bus capacitors used in prior art converters. In addition, 90% of the power being converted is directly processed by steering current into the AC three-phase load without high frequency chopping or switching. The invention is optimized for photovoltaic, utility-grid-interactive applications.
摘要翻译：公开了一种DC-AC电力转换器，其提供电流调节的三相AC输出和非常高的转换效率。转换器通过在六极桥的不同半桥中使用互补半导体开关，从外部直流电流源吸收功率并将该电流直接引导到三相负载的两相。转向开关选择每60°旋转一次，在任何给定的时间将电流引导到具有最大电压差的两相。剩余的半桥充当高频，双向电流源，以平衡三相负载电流。这种拓扑和控制方法显着降低了电源转换损耗。转换器还可以包括用于在三相转换发生之前将外部直流电压源转换为直流电流源的附加功率处理级。现有技术的转换器首先将“软”DC源转换成电压源，然后转换成AC电流源。本发明消除了对现有技术转换器中使用的大型PWM滤波电感器和直流总线电容器的需要。另外90％的转换功率直接通过转向电流进入AC三相负载，而无需高频斩波或切换。本发明针对光伏，公用事业电网交互应用进行了优化。

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