公开(公告)号：US20150094967A1

公开(公告)日：2015-04-02

申请号：US14484303

申请日：2014-09-12

Applicant: Hitachi, Ltd.

Inventor： Toru KOUNO ,  Tetsuharu OHYA ,  Yuuichi NAGAYAMA ,  Tomoharu NAKAMURA ,  Koki MORIKAWA ,  Satoshi MIYAZAKI

IPC: G01R31/40

CPC classification number: H02S50/00 ,  G01R31/025 ,  H02H1/0015

Abstract: A failure diagnosis system is configured to calculate an estimated irradiation on a first photovoltaic string and an estimated operating temperature of the first photovoltaic string based on a short-circuit current and an open-circuit voltage on a current-voltage characteristic of the first photovoltaic string, and the array output voltage value and the array output current value measured by an array measurement apparatus. The failure diagnosis system is configured to calculate an estimated current value of the first photovoltaic string based on the estimated irradiation, the estimated operating temperature, and the current-voltage characteristic. The failure diagnosis system is configured to diagnose degradation of the first photovoltaic string by comparing the measured current value of the first photovoltaic string and the estimated current value.

Abstract translation: 故障诊断系统被配置为基于第一光伏电池的电流 - 电压特性上的短路电流和开路电压来计算第一光伏电池串上的估计照射和第一光伏电池的估计工作温度 ，阵列输出电压值和阵列输出电流值由阵列测量装置测量。 故障诊断系统被配置为基于估计的照射，估计的工作温度和电流 - 电压特性来计算第一光伏电池的估计电流值。 故障诊断系统被配置为通过比较测量的第一光伏电池的电流值和估计的电流值来诊断第一光伏电池的劣化。

公开(公告)号：US20150090312A1

公开(公告)日：2015-04-02

申请号：US14484304

申请日：2014-09-12

Applicant: Hitachi, Ltd.

Inventor： Toru KOUNO ,  Yuuichi NAGAYAMA ,  Masaaki FUJIMORI ,  Tomoharu NAKAMURA ,  Koki MORIKAWA

IPC: H01L31/02 ,  G06F17/50

CPC classification number: H01L31/02008 ,  G06F17/50 ,  G06F17/5068 ,  H02S10/00 ,  Y02E10/50

Abstract: A power generating system comprising: a plurality of power generating units coupled in parallel; a power collecting device for collecting electric power output from the plurality of power generating units; and wirings for coupling the plurality of power generating units and the power collecting device. A ratio of a conductor diameter to a predetermined length of each of the wirings is defined as a reference ratio. A value obtained by multiplying the reference ratio, a number of the wirings, and a loss generated by a specific wiring together is subtracted from a value obtained by multiplying a predetermined number of wirings for adjustment by a ratio of a conductor diameter to a length of the specific wiring. A total of the ratios of the conductor diameters to the lengths of the predetermined number of the wirings for adjustment is determined as a value less than the subtracted value.

Abstract translation: 一种发电系统，包括：并联耦合的多个发电单元; 用于收集从所述多个发电单元输出的电力的集电装置; 以及用于联接多个发电单元和电力收集装置的配线。 每个布线的导体直径与预定长度的比率被定义为参考比。 将通过将参考比，布线数量和由特定布线产生的损耗一起获得的值从通过将预定数量的用于调整的布线的布线乘以导体直径与导体直径的比率而获得的值来减去 具体布线。 将导体直径与用于调整的预定布线的长度的总和的总和确定为小于减去值的值。

公开(公告)号：US20140058688A1

公开(公告)日：2014-02-27

申请号：US13975826

申请日：2013-08-26

Applicant: Hitachi, Ltd.

Inventor： Tohru KOHNO ,  Akihiro NAKAMURA ,  Tomoharu NAKAMURA ,  Koki MORIKAWA

IPC: G01R31/02

CPC classification number: G01R31/02 ,  H02S50/10

Abstract: A low-cost failure diagnosis method, without addition of a measuring unit and a communication unit, provided for a solar battery system, of calculating a working temperature and the number of failed solar battery modules in a solar battery array, by calculating a solar radiation amount while updating a predetermined coefficient as a ratio between a short-circuit current and a working current in accordance with state of the solar battery array and using measured data having the working current and working voltage measured with a detection unit.

Abstract translation: 一种低成本故障诊断方法，通过计算太阳能辐射来计算太阳能电池阵列中的太阳能电池模块的工作温度和数量，而不添加用于太阳能电池系统的测量单元和通信单元 根据太阳能电池阵列的状态更新作为短路电流与工作电流之间的比例的预定系数，并使用利用检测单元测量的具有工作电流和工作电压的测量数据。