Title:
OUTPUT POWER CONTROL METHOD FOR SOLAR BATTERY
Document Type and Number:
Japanese Patent JP3584628
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To supply the electric power and the voltage having the reduced variance to a DC load from a solar battery by detecting the DC load voltage and comparing this voltage with two different threshold voltage levels and controlling the distribution rate based on the result of comparison.
SOLUTION: A commercial power supply system 1 is connected to a DC load via a rectifier circuit 2 and at the same time a solar battery module 4 is connected to a load 3 via a DC power conversion device 5. Then a controller 6 inputs the output voltage Vs and output current Is of the module 4 and the double end voltage Vinv of the load 3 and compares them with high and low threshold voltage levels. When the voltage Vinv is higher than both threshold voltage levels, the controller 6 outputs a distribution rate command α1 to perform the output voltage suppression control. When the voltage Vinv is lower than both threshold voltage levels, the controller 6 outputs the command α1 to perform the maximum power tracking. When the voltage Vinv is equal to a level set between both threshold voltage levels, the controller 6 keeps the distribution rate as it is. As a result, the electric power and the voltage having the reduced variance can be supplied to the load.
Inventors:
Tomoyuki Taniguchi
Application Number:
JP23916396A
Publication Date:
November 04, 2004
Filing Date:
September 10, 1996
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
H02J3/38; G05F1/67; H02M3/28; H02M3/335; H02N6/00; (IPC1-7): G05F1/67; H02J3/38; H02M3/28; H02M3/335; H02N6/00
Domestic Patent References:
| JP6259152A |
Attorney, Agent or Firm:
Tomoshi Tsugawa
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