Photovoltaic power generation systems and methods of controlling photovoltaic power generation systems
First Claim
1. A photovoltaic power generation system comprising a solar cell module, a restricted area including an area having the solar cell module installed therein, detecting means for detecting intrusion of an intruder into the restricted area to output a signal, and electric shock preventing means activated by the signal outputted from the detecting means.
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Accused Products
Abstract
There are provided a restricted area including an area in which solar cell modules are installed, a preventer for preventing intrusion of an intruder into the restricted area, and a detector capable of detecting the intrusion of the intruder into the restricted area, and a predetermined electric shock preventer is activated by a signal outputted from the detector upon detection of the intruder to prevent the intruder from receiving an electric shock.
186 Citations
46 Claims
- 1. A photovoltaic power generation system comprising a solar cell module, a restricted area including an area having the solar cell module installed therein, detecting means for detecting intrusion of an intruder into the restricted area to output a signal, and electric shock preventing means activated by the signal outputted from the detecting means.
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15. A method of controlling a photovoltaic power generation system comprising a solar cell module, a restricted area including an area in which the solar cell module is installed, detecting means for detecting intrusion of an intruder into the restricted area, and electric shock preventing means,
wherein when the detecting means detects the intrusion of the intruder into the restricted area, the electric shock preventing means is activated based on a signal outputted from the detecting means.
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25. A method of controlling a photovoltaic power generation system comprising a solar cell array comprised of a plurality of solar cell modules connected, one sensor or a plurality of sensors arranged around the solar cell array, and a switch for establishing a short circuit between output terminals of the solar cell array,
wherein the short circuit between the output terminals is established based on an output signal from the sensor.
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30. A method of controlling a photovoltaic power generation system comprising a plurality of solar cell strings each consisting of a plurality of solar cell modules, a plurality of sensors arranged around each of the solar cell strings, and a plurality of switches for establishing a short circuit between output terminals of each of the solar cell strings,
wherein the plurality of solar cell strings are connected in parallel and the short circuit between output terminals is established on a string-by-string basis for the plurality of solar cell strings, based on output signals from the plurality of sensors.
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39. A method of controlling a photovoltaic power generation system comprising a solar cell string comprised of a plurality of solar cell modules connected, a plurality of sensors provided around the solar cell string, and a switch for establishing a short circuit between output terminals of the solar cell string, based on output signals from the plurality of sensors, the method comprising:
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a first step of measuring the output signals from the plurality of sensors;
a second step of normalizing values of the output signals;
a third step of calculating a comparison calculated value D, which is defined below, when at least one of a plurality of normalized output signal values Ax is larger than a reference value S, the comparison calculated value D=(a minimum of the plurality of normalized output signal values Ax)/(a maximum of the plurality of normalized output signal values Ax); and
a fourth step of establishing the short circuit between the output terminals by the switch when the comparison calculated value D is smaller than a comparison reference value D0.
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43. A method of controlling a photovoltaic power generation system comprising a plurality of solar cell strings connected in parallel, each solar cell string being comprised of a plurality of solar cell modules connected and having a plurality of sensors provided around the solar cell string and a switch for establishing a short circuit between output terminals of the solar cell string, the method comprising:
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(1) carrying out for each of the plurality of solar cell strings, a first step of measuring output signals from the plurality of sensors, a second step of normalizing values of the output signals, and a third step of calculating a comparison calculated value Dy, which is defined below, when at least one of a plurality of normalized output signal values Ax is larger than a reference value S, the comparison calculated value Dy=(a minimum of the plurality of normalized output signal values Ax)/(a maximum of the plurality of normalized output signal values Ax); and
(2) carrying out a fourth step when at least one of the comparison calculated values Dy of the plurality of solar cell strings is smaller than a comparison reference value D0, the fourth step being a step of establishing a short circuit between output terminals of a solar cell string corresponding to the comparison calculated value Dy smaller than the comparison reference value D0, by the switch. - View Dependent Claims (44, 45, 46)
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Specification