Power conditioner for solar power generation system

• US 6,570,270 B2
• Filed: 04/12/2002
• Issued: 05/27/2003
• Est. Priority Date: 04/13/2001
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Takebayashi, Tsukasa
• Primary Examiner(s): Riley, Shawn
• Application Number:
  US10/120,831
• Publication Number:
  US 20020149950A1
• Time in Patent Office: 410 Days
• Field of Search: 307/64, 307/66, 307/75, 307/48, 307/80, 307/86, 307/43, 320/101, 323/906, 136/244, 368/205, 713/340, 700/279, 700/298
• US Class Current: 307/81
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02M 5/45 using semiconductor devices only
• CPC Class Codes: H02M 7/4807 having a high frequency intermediate AC stage
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers

Abstract

An inverter unit converts power from a solar battery into AC power and interconnects the AC power with a utility power supply. A control circuit manages the time during which the inverter unit stops. If the time is equal to or longer than a predetermined time, it is determined that one day has passed. Data for one day stored in a memory is accordingly cleared and data is newly stored in the memory.

Claims

1. A power conditioner for a solar power generation system, said power conditioner being driven according to power generated by a solar battery, comprising:

an inverter converting the power generated by said solar battery into alternating-current power to interconnect the alternating-current power with a utility power supply; and

a control circuit including a memory storing data for one day, said control circuit managing a time during which said inverter stops, and determining that one day has passed when said time is equal to or longer than a predetermined time, clearing said memory and storing new data in said memory.

2. The power conditioner for a solar power generation system according to claim 1, further comprising a remote controller separated from said control circuit for remotely providing a control command to said control circuit.

3. The power conditioner for a solar power generation system according to claim 1, further comprising a display unit for displaying an amount of power generated in a predetermined time when said inverter operates, said amount of power being represented by a predetermined number of graphs, wherein

said control circuit updates data displayed by said display unit as time passes, successively moves previous data on said graphs, and maintains the displayed data as it is without updating the displayed data during the time in which said inverter stops.

4. The power conditioner for a solar power generation system according to claim 3, further comprising a remote controller separated from said control circuit for remotely providing a control command to said control circuit.

5. The power conditioner for a solar power generation system according to claim 4, wherein

said remote controller operates by receiving power from said solar battery when said inverter is running, and transmits, to said control circuit, details of manipulation of said remote controller when said inverter stops, said details of manipulation being transmitted when said inverter is started.

6. The power conditioner for a solar power generation system according to claim 4, wherein

said remote controller operates by receiving power from said utility power supply to manage the time during which said inverter stops.