公开(公告)号：US07859241B2

公开(公告)日：2010-12-28

申请号：US12191900

申请日：2008-08-14

申请人： Toshiya Yoshida ,  Katsumi Ohniwa ,  Michio Ohtsubo

发明人： Toshiya Yoshida ,  Katsumi Ohniwa ,  Michio Ohtsubo

IPC分类号： G05F1/56

CPC分类号： G05F1/67 ,  H02M3/157 ,  Y02E10/58 ,  Y10S323/906

摘要： A photovoltaic power generation controller, in which minute power change is detected even with a low-resolution AD converter, thereby being capable of performing maximum power point tracking control with high accuracy, is provided. In the photovoltaic power generation controller of the invention, a control circuit 44 shifts switches 41 to respective output A sides of a voltage detector 8 and a current detector 9; gives a low-frequency ripple component to an operating voltage of a solar cell 1 while increasing modulation factor D by predetermined variation width d, to start maximum power point search from an open circuit voltage side; confirms a maximum power point passage when: an operating point oscillates in the vicinity of the maximum power point; and a power value, which is output by a power detector 43, after update of the modulation factor becomes smaller than a power value before update of the modulation factor; and switches the switches 41 to respective output sides of amplifiers 23 and 24 to continue the maximum power point tracking control.

摘要翻译： 提供了即使利用低分辨率AD转换器检测微小功率变化从而能够以高精度执行最大功率点跟踪控制的光伏发电控制器。 在本发明的光电发电控制器中，控制电路44将开关41移动到电压检测器8和电流检测器9的各个输出端A侧; 将太阳能电池1的工作电压提供低频纹波分量，同时以调制因数D增加预定的变化幅度d，以从开路电压侧开始最大功率点搜索; 在以下情况下确认最大功率点通道：工作点在最大功率点附近振荡; 并且在调制因子更新之后由功率检测器43输出的功率值变得小于调制因子更新之前的功率值; 并将开关41切换到放大器23和24的相应输出侧，以继续最大功率点跟踪控制。

公开(公告)号：US20090115393A1

公开(公告)日：2009-05-07

申请号：US12191900

申请日：2008-08-14

申请人： Toshiya Yoshida ,  Katsumi Ohniwa ,  Michio Ohtsubo

发明人： Toshiya Yoshida ,  Katsumi Ohniwa ,  Michio Ohtsubo

IPC分类号： G05F5/02

CPC分类号： G05F1/67 ,  H02M3/157 ,  Y02E10/58 ,  Y10S323/906

摘要： A photovoltaic power generation controller, in which minute power change is detected even with a low-resolution AD converter, thereby being capable of performing maximum power point tracking control with high accuracy, is provided. In the photovoltaic power generation controller of the invention, a control circuit 44 shifts switches 41 to respective output A sides of a voltage detector 8 and a current detector 9; gives a low-frequency ripple component to an operating voltage of a solar cell 1 while increasing modulation factor D by predetermined variation width d, to start maximum power point search from an open circuit voltage side; confirms a maximum power point passage when: an operating point oscillates in the vicinity of the maximum power point; and a power value, which is output by a power detector 43, after update of the modulation factor becomes smaller than a power value before update of the modulation factor; and switches the switches 41 to respective output sides of amplifiers 23 and 24 to continue the maximum power point tracking control.

摘要翻译： 提供了即使利用低分辨率AD转换器检测微小功率变化从而能够以高精度执行最大功率点跟踪控制的光伏发电控制器。 在本发明的光电发电控制器中，控制电路44将开关41移动到电压检测器8和电流检测器9的各个输出端A侧; 将太阳能电池1的工作电压提供低频纹波分量，同时以调制因数D增加预定的变化幅度d，以从开路电压侧开始最大功率点搜索; 在以下情况下确认最大功率点通道：工作点在最大功率点附近振荡; 并且在调制因子更新之后由功率检测器43输出的功率值变得小于调制因子更新之前的功率值; 并将开关41切换到放大器23和24的相应输出侧，以继续最大功率点跟踪控制。