Sumitomo Electric Industries, Limited

Kyoto University

Takefumi Shimoguchi

Takashi Tsuno

Kenichi Hirotsu

Satoshi Hatsukawa

Toshikazu Shibata

Takashi Hikihara

Tomohisa Matsushita

Tetsuo Goto

Tsuguhiro Takuno

Yoshihisa Asao

This monitoring system for photovoltaic power generation includes: a first to n-th power collecting systems each for supplying a power conditioner with collected outputs from plural photovoltaic panels via a connection box; slave devices provided for connection boxes respectively belonging to the first to n-th power collecting systems, each slave device collecting measurement information about power generation and transmitting the collected measurement information by use of a direct current electrical path of the power collecting system thereof; a master device provided at a power collection end on an inlet side of the power conditioner to obtain the measurement information; a system selection unit for selecting one power collecting system upon reception of a selection signal from the master device and causing power line communication to be performed by use of a direct current electrical path of the selected power collecting system; and a monitoring device connected to the master device.

Monitoring system for photovoltaic power generation and communication method therefor

To realize a transmission function of power line communication by a further simplified and cost-effective circuit configuration, in a PLC modem installed in an electric appliance such as a household electrical appliance. A semiconductor switching element that is present on an electric circuit connected to a power line is driven by a modulator unit. The modulator unit controls ON/OFF operations of the semiconductor switching element, to thereby cause a communication signal of a modulated rectangular wave to be output to the power line for a prescribed period.

Power line communication device, power supply circuit with communication function, electric appliance, and control and monitoring system

Growing community of inventors

Osaka, Japan

Takefumi Shimoguchi