Photovoltaic power generation system

Patent metadata

Field	Value
Publication number	US-8952569-B2
Application number	US-201113051600-A
Country	US
Kind code	B2
Filing date	Mar 18, 2011
Priority date	Mar 23, 2010
Publication date	Feb 10, 2015
Grant date	Feb 10, 2015

Abstract

A photovoltaic power generation system is discussed. The photovoltaic power generation system includes a solar cell module having a plurality of solar cell row groups, a plurality of sensing units respectively connected to the plurality of solar cell row groups, a plurality of amplification units respectively connected to the plurality of solar cell row groups, and a signal control unit that detects currents output from the solar cell row groups in response to sensing signals output from the sensing units, controls a plurality of control signals applied to the amplification units based on the decided signal states, tracks a maximum power based on a voltage and a current output from the solar cell module, and outputs the maximum power.

First claim

What is claimed is:

1. A photovoltaic power generation system comprising:
a solar cell module configured to include a plurality of solar cell row groups divided into groupings of the plurality of solar cell row groups, each of the plurality of solar cell row groups being configured to have at least one solar cell row of a plurality of solar cells and output a current and a voltage from the at least one solar cell row, the solar cells belonging to each of the plurality of solar cell row groups being connected in series to one another, the solar cells belonging to a first solar cell row group being electrically separated from the solar cells belonging to a second solar cell row group in a solar cell module;
a plurality of signal control units connected to the plurality of solar cell row groups, respectively,
and each of the plurality of signal control units tracking a maximum power based on the current and the voltage output from each of the plurality of solar cell row groups and outputs the maximum power;
a plurality of sensing units connected between each of the plurality of solar cell row groups and each of the plurality of signal control units, sense currents output from the plurality of solar cell row groups, and output the sensed currents to the plurality of signal control units; and
a plurality of amplification units connected between each of the plurality of solar cell row groups and each of the plurality of signal control units, and comprising a transistor,
wherein each of the plurality of signal control units compares an amount of current sensed by each of the plurality of sensing units with a setting value, and applies a control signal to a corresponding amplification unit of the plurality of amplification units, when the amount of current is less than the setting value, the corresponding amplification unit corresponding to a sensing unit which outputs the amount of current less than the setting value, and
the corresponding amplification unit amplifies a current input thereto and outputs the amplified current to an output terminal of a signal control unit.

2. The photovoltaic power generation system of claim 1 , wherein the signal control unit increases a magnitude of each control signal as the difference between the amount of sensed current and the setting value increases.

3. The photovoltaic power generation system of claim 2 , wherein each of the plurality of control signals is a voltage.

Assignees

• Yun Juhwan
• Lg Electronics Inc

Inventors

• Yun Juhwan

Classifications

• H10F77/955

  for photovoltaic devices · CPC title

• G05F1/67 Primary

  to the maximum power available from a generator, e.g. from solar cell · CPC title

• Y02E10/58

  Cross-Sectional Technologies · mapped topic

• H01L31/02021

  Electricity · mapped topic

• Y02E10/56

  Power conversion systems, e.g. maximum power point trackers · CPC title