SOLAR DEVICE

• US 20130134782A1
• Filed: 11/29/2012
• Published: 05/30/2013
• Est. Priority Date: 11/29/2011
• Status: Active Grant

• Current Assignee: LSIS Co. Ltd. (LS Corporation)
• Original Assignee: LSIS Co. Ltd. (LS Corporation)
• Inventors: SEON, Jong Kug
• Granted Patent: US 9,490,632 B2
• Time in Patent Office: Days
• US Class Current: 307/31
• CPC Class Codes: G05F 3/08 wherein the variable is dc
• CPC Class Codes: H01L 31/02021 for solar cells electrical connection means, e.g. junction boxes, specially adapted for structural association with photovoltaic modules H02S40/34
• CPC Class Codes: H02J 1/12 Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
• CPC Class Codes: H02J 2300/26 involving maximum power point tracking control for photovoltaic sources maximum power point systems in particular G05F1/67
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02M 7/44 by static converters
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/5458 Monitor sensor; Alarm systems
• CPC Class Codes: H04B 2203/5483 using coupling circuits
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines
• CPC Class Codes: H04B 3/548 the power on the line being DC arrangements for feeding power H04L12/10; extracting feeding power from signals H04L25/02
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers

Abstract

A solar device is provided. The solar device includes a solar module configured to absorb solar energy to convert the solar energy to electrical energy, a DC converter configured to detect an input voltage output from the solar module and outputs a DC voltage corresponding to a maximum power point through the detected input voltage, an interface unit configured to transmit data including the input voltage detected from the DC converter and the DC voltage corresponding to the maximum power point, a data combiner configured to combine and transmit data on the solar module with the data received from the interface unit, a data synthesizer configured to remove a DC voltage offset from the data received from the data combiner, and a data controller configured to track a maximum power point using data from which the DC voltage offset has been removed.

Claims

1. A solar device, comprising:

a solar module configured to absorb solar energy to convert the solar energy into electrical energy;

a DC converter configured to detect an input voltage output from the solar module and output a DC voltage corresponding to a maximum power point through the detected input voltage;

an interface unit configured to transmit data comprising the input voltage detected from the DC converter and the DC voltage corresponding to the maximum power point;

a data combiner configured to combine and transmit data on the solar module with the data received from the interface unit;

a data synthesizer configured to remove a DC voltage offset from the data received from the data combiner; and

a data controller configured to track a maximum power point using data from which the DC voltage offset has been removed.

2. The device according to claim 1, wherein the DC converter, the interface unit, the data combiner, the data synthesizer, and the data controller are connected by a DC cable line.

3. The device according to claim 1, wherein each of the solar module, the DC converter, the interface unit and the data combiner is provided in plurality.

4. The device according to claim 1, further comprising a DC/AC converter configured to convert maximum power corresponding to the tracked maximum power point to AC power and provide the result to loads.

5. The device according to claim 1, wherein the solar module is arranged according to sunshine conditions or temperature conditions.

6. The device according to claim 1, wherein the DC converter comprises:

an input voltage detector configured to detect a voltage output from the solar module and input to the DC converter;

an output voltage detector configured to detect a voltage output from the DC converter; and

a switching circuit configured to output a DC voltage corresponding to the maximum power point using the input voltage and output voltage.

7. The device according to claim 1, wherein the data on the solar module comprises the output voltage of the solar module and the identifying number of the solar module.

8. The device according to claim 1, wherein the data controller comprises:

a current detector configured to detect current flowing through the solar module;

a controller configured to output a control signal generating a maximum power point using the output voltage of the DC converter and the detected current; and

a maximum power tracking unit configured to receive the output control signal and tracks the maximum power point.

9. The device according to claim 1, wherein the data combiner combines data on the output voltage of each DC converter with data on each solar module using a capacitor.

10. The device according to claim 1, wherein the data combiner combines data on the output voltage of each DC converter with data on each solar module using a transformer.

11. The device according to claim 1, wherein the data combiner combines data on the output voltage of each DC converter with data on each solar module using a mixer.

12. The device according to claim 1, wherein the data combiner combines data on the output voltage of each DC converter with data on each solar module using a multiplexer.