Solar cell array control device
First Claim
1. A solar cell array control device, comprising:
- a plurality of solar cell modules connected together in series to form a solar cell array;
a bidirectional DC converter having a plurality of input terminals corresponding to and electrically connected to output terminals of said solar cell modules for connecting all of said solar cell modules in series, said bidirectional DC converter being capable of inputting a pulse width modulation signal to control a compensation current when abnormality is detected in one of said solar cell modules;
at least a voltage sensor having a plurality of input terminals electrically connected to said solar cell modules, said voltage sensor being capable of generating an abnormal voltage when abnormality is detected in one of said solar cell modules; and
a control unit electrically connected to said voltage sensor and said bidirectional DC converter, said control unit being used to output said pulse width modulation signal by determining said abnormal voltage to control said bidirectional DC converter for compensating the conversion current and thus enhancing an output power of said solar cell modules.
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Abstract
A solar cell array control device has a plurality of solar cell modules, a bidirectional DC converter, at least a voltage sensor and a control unit. The bidirectional DC converter corresponds to and is electrically connected to the solar cell modules to connect these solar cell modules in series to form a solar cell array. The voltage sensor is electrically connected to the solar cell modules, and can generate an abnormal voltage when detecting that one of the solar cell modules is abnormal. The control unit is electrically connected to the voltage sensor and the bidirectional DC converter, and outputs a pulse width modulation signal by detecting the abnormal voltage to control the bidirectional DC converter for compensating the conversion current and thus enhancing the output power of this solar cell module.
163 Citations
13 Claims
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1. A solar cell array control device, comprising:
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a plurality of solar cell modules connected together in series to form a solar cell array;
a bidirectional DC converter having a plurality of input terminals corresponding to and electrically connected to output terminals of said solar cell modules for connecting all of said solar cell modules in series, said bidirectional DC converter being capable of inputting a pulse width modulation signal to control a compensation current when abnormality is detected in one of said solar cell modules;
at least a voltage sensor having a plurality of input terminals electrically connected to said solar cell modules, said voltage sensor being capable of generating an abnormal voltage when abnormality is detected in one of said solar cell modules; and
a control unit electrically connected to said voltage sensor and said bidirectional DC converter, said control unit being used to output said pulse width modulation signal by determining said abnormal voltage to control said bidirectional DC converter for compensating the conversion current and thus enhancing an output power of said solar cell modules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A solar cell array control method comprising the steps of:
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a. building a bidirectional DC converter to connect a plurality of solar array modules in series to form a solar cell array;
b. reading a voltage value of at least an arbitrary two of said solar cell modules;
c. calculating a read voltage value to determine whether said read voltage values is larger than a set value and output an abnormal voltage if an answer is yes; and
d. generating a pulse width modulation signal input to said bidirectional DC converter to switch the pulse width for compensating the conversion current of said solar cell modules and thus enhancing the output power. - View Dependent Claims (10, 11, 12, 13)
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Specification