| 摘要 |
An apparatus and a method for controlling senseless MPPT(Maximum Power Point Tracking) for a photovoltaic power generation system are provided to simplify a structure of a control circuit by reducing feedback elements to one. An apparatus for controlling senseless MPPT for a photovoltaic power generation system includes a current transformer(2), a new duty ratio detector(23), an old duty ratio detector(24), a duty ratio comparator(25), and a PWM signal generator(3). The current transformer(2) detects an output current of a DC/DC converter(18). The new duty ratio detector(23) detects and memorizes a new duty ratio by receiving output signals of a duty ratio adder(28) and a duty ratio subtractor(29). The old duty ratio detector(24) detects and memorizes an old duty ratio by receiving an output signal of the PWM signal generator(3). The duty ratio comparator(25) compares output signals of the new duty ratio detector(23) and the old duty ratio detector(24). The PWM signal generator(3) outputs a control signal of which a pulse width is modulated, to the DC/DC converter(18).
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