Title:
PHOTO VOLTAIC POWER GENERATION SYSTEM
Document Type and Number:
Japanese Patent JP2022187039
Kind Code:
A
Abstract:
To provide a connection device, a PV module, and a photovoltaic power generation system that enable Maximum Power Point Tracking (MPPT) control for each module.SOLUTION: Each of connection devices 10 is configured to: turn on a first semiconductor switch 6 and a second semiconductor switch 7 simultaneously to set a voltage of a capacitor 4 to zero; immediately after that, turn off the first semiconductor switch 6 and the second semiconductor switch 7 simultaneously to recharge the capacitor 4; meanwhile, calculate generated power of a PV module 1, using a predetermined formula based on a voltage measured by a voltage sensor 5; and scan the voltage to determine and store, as a new maximum power point voltage, a voltage at a point where the generated power being calculated is maximum; and perform step-down DC/DC conversion on the PV module 1, so as to control each PV module so that the voltage of the PV module reaches the maximum power point. A number of PV modules are connected with each other in series to form a string, and connected to a system through voltage-type DC/AC inverse conversion after step-up DC/DC conversion of current thereof or directly through current-type inverse conversion.SELECTED DRAWING: Figure 1
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Inventors:
SHIMADA RYUICHI
Application Number:
JP2021094833A
Publication Date:
December 16, 2022
Filing Date:
June 06, 2021
Export Citation:
Assignee:
SHIMADA RYUICHI
SIGMA ENERGY CO LTD
SIGMA ENERGY CO LTD
International Classes:
G05F1/67
Domestic Patent References:
| JP2011107904A | 2011-06-02 | |||
| JP2015521460A | 2015-07-27 | |||
| JPH1146457A | 1999-02-16 | |||
| JP2000112545A | 2000-04-21 |
Attorney, Agent or Firm:
Sadaaki Igarashi