Abstract: A solar power generation system includes a string, an inverter, a first shutoff device, and a second shutoff device. The string includes a plurality of solar cell module groups. The first shutoff device cuts off connections between the plurality of solar cell module groups connected to a first electric path, in response to a first control signal. The second shutoff device cuts off connections between the plurality of solar cell module groups connected to a second electric path, in response to a second control signal output from the first shutoff device by a communication system different from power line communication. A first switching unit of the first shutoff device includes a first open and close unit and a first semiconductor switching device connected in parallel with the first open and close unit. The first semiconductor switching device is turned ON before the first open and close unit is operated.

Abstract: The solar power generation system includes a string, an inverter, and a shut-off device. The string includes a plurality of solar cell modules connected in series. The inverter is connected to the string and is configured to convert the DC power output from the solar cell modules to AC power. The shut-off device is disposed at a plurality of intermediate points of the string and is configured to shut off a voltage output from the solar cell modules in response to a control signal from the inverter.

Abstract: A solar power generation system includes a string, an inverter, a first shutoff device, and a second shutoff device. The string includes a plurality of solar cell modules connected in series. The first shutoff device includes a first switching unit and a second switching unit, and turns OFF the switching units, in response to a first control signal from the inverter. The first switching unit is connected to an anode side terminal of the string and an anode side terminal of the inverter. The second switching unit is connected to a cathode side terminal of the string and a cathode side terminal of the inverter. The second shutoff device cuts off a solar cell module group including one or more among the plurality of solar cell modules and either another solar cell module or the inverter in response to a second control signal from the first shutoff device.

Abstract: A solar power generation system includes a string, an inverter, a first shutoff device, and a second shutoff device?. The string includes a plurality of solar cell modules connected in series. The first shutoff device cuts off the string and the inverter in response to a first control signal from the inverter. The second shutoff device cuts off a solar cell module group including one or more among the plurality of solar cell modules and either another solar cell module or the inverter in response to a second control signal from the first shutoff device. The second shutoff device includes a first switching unit that includes a first open and close unit and a first semiconductor switching device connected in parallel with the first open and close unit. The first semiconductor switching device is turned ON before the first open and close unit is operated.

Abstract: The solar power generation system includes a string, an inverter, and primary and secondary shut-off devices. The primary shut-off device cuts off the string and the inverter in response to a first control signal. The secondary shut-off device cuts off a solar cell module group and another solar cell module or the inverter in response to a second control signal from the primary shut-off device. The secondary shut-off device includes a first secondary-device open-close unit in a first electric pathway, a semiconductor switching device disposed between the first secondary-device open-close unit and a solar cell module group, and a power supply unit having an anode-side terminal connected between a solar cell module group and the semiconductor switching device, which generates power to drive the third open-close unit. The semiconductor switching device enters an OFF state when power generated by the solar cell module groups falls below a predetermined threshold.

Abstract: The solar power generation system includes a string, an inverter, and shut-off devices. The string includes a plurality of solar cell module groups connected in series with each other. The solar cell module groups each include a plurality of solar cell modules. The inverter is connected to the string and converts DC power output from the solar cell modules to AC power. The shut-off devices are installed respectively in electrical paths connecting between the solar cell module groups and sever the connection between the solar cell module groups in accordance with a control signal from the inverter.

Abstract: A solar power generation system includes a string, an inverter a first shut-off device, and a second shut-off device. The string includes a plurality of solar cell module groups connected in series with each other. The first shut-off device connected to a first electric path connecting between the plurality of solar cell module groups. The second shut-off device connected to a second electric path connecting between the plurality of solar cell module groups. The first shut-off device cuts off a connection between the plurality of solar cell module groups connected to the first electric path in response to a first control signal from the inverter. The second shut-off device cuts off a connection between the solar cell module groups connected to the second electric path in response to a second control signal output from the first shut-off device by a communication system different from power line communication.

Abstract: A solar power generation network shut-off unit is disposed between a plurality of solar power generation modules and a power conditioner, shuts off the supply of power the power generation modules to the power conditioner when an emergency shut-off button is pressed, and comprises a first circuit breaker, second circuit breakers, and a power supply line. When the first circuit breaker detects that the emergency shut-off button has been pressed, the supply of power from the first circuit breaker to the second circuit breakers is halted, and the supply of power from the solar power generation modules through the power line is shut off at the second circuit breakers.

Abstract: A solar power generation system includes a string, an inverter, and a plurality of shut-off devices. The string includes a plurality of solar cell module groups. The plurality of shut-off devices is configured to cut off a connection between the plurality of solar cell module groups in response to a control signal from the inverter. The plurality of solar cell module groups includes a first group, a second group connected to the first group, and a third group connected to the second group. The plurality of shut-off devices includes a first shut-off device. The first shut-off device includes a first switching unit connected to an anode-side terminal of the second group. The first switching unit includes a first open-close unit and a first semiconductor switching device connected in parallel with the first open-close unit. The first semiconductor switching device is turned ON before the first open-close unit is operated.

Abstract: A solar power generation system includes a string, an inverter, a first shutoff device, and a second shutoff device. The string includes a plurality of solar cell modules connected in series. The first shutoff device turns OFF, in response to a first control signal from the inverter, a first switching unit and a second switching unit. The first switching unit is connected to an anode side terminal of the string and an anode side terminal of the inverter. The second switching unit is connected to a cathode side terminal of the string and a cathode side terminal of the inverter. The second shutoff device is configured to output a second state signal to the first shutoff device and cut off a solar cell module group and either another solar cell module or the inverter, in response to a second control signal from the first shutoff device.

Abstract: A solar power generation system includes a string, an inverter, and a first shut-off device. The string includes a plurality of solar cell modules connected in series. The inverter converts DC power output from the plurality of solar cell modules to AC power. The first shut-off device is connected to electrical paths connecting the plurality of solar cell modules to each other. The string includes a plurality of solar cell module groups each including the plurality of the solar cell modules. The plurality of solar cell module groups include at least a first group and a second group connected to the first group. The first shut-off device shuts off a first electrical path connecting the first group and the second group and a second electrical path connecting the plurality of solar cell modules belonging to the first group to each other in response to a control signal from the inverter.

Abstract: A solar power generation system includes a string, an inverter, and a plurality of shut-off devices. The string includes a plurality of solar cell module groups. The plurality of shut-off devices is configured to cut off the connection between the plurality of solar cell module groups in response to a control signal from the inverter. The plurality of solar cell module groups includes a first group, a second group connected to the first group, and a third group connected to the second group. The plurality of shut-off devices includes a first shut-off device. The first shut-off device includes a first open-close unit connected to an anode-side terminal of the second group and a second open-close unit connected to a cathode-side terminal of the second group.

Abstract: A solar power generation network shut-off unit comprises a first circuit breaker and second circuit breakers. The first circuit breaker is provided to a power line connecting a plurality of solar power generation modules and a power conditioner in series. When an emergency shut-off button is pressed, the supply of power from the solar power generation modules through the power line is shut-off, and an emergency shut-off signal is transmitted. The second circuit breakers are provided to each of a plurality of solar power generation modules, and when an emergency shut-off signal is received from the first circuit breaker, the supply of power from the plurality of solar power generation modules through the power line is shut-off.

Abstract: A solar power generation system includes a string, an inverter, a first shutoff device, and a second shutoff device. The string includes a plurality of solar cell module groups. The first shutoff device cuts off connections between the plurality of solar cell module groups connected to a first electric path in response to a first control signal. The second shutoff device is driven by power supplied from the first shutoff device and cuts off connections between the plurality of solar cell module groups connected to a second electric path in response to a second control signal. The first shutoff device includes a first switching unit which includes a first open and close unit and a first semiconductor switching device connected in parallel with the first open and close unit. The first semiconductor switching device is turned ON before the first open and close unit is operated.

Abstract: This is a manufacturing method of a semiconductor device having a first region, a second region, and a third region. A second gate dielectric film is formed on a semiconductor substrate in the second region. A thin first gate dielectric film is formed on the semiconductor substrate in the first region. A protective film is formed on the first gate dielectric film and on the second gate dielectric film. A thin paraelectric film is formed on the semiconductor substrate in the third region. An amorphous film formed of a material including a metal oxide and a first element is formed on the protective film and on the paraelectric film. A metal film is formed on the amorphous film. By performing a heat treatment, the amorphous film is crystallized to form a ferroelectric film.

Abstract: A solar power generation system includes a string, an inverter a first shut-off device, and a second shut-off device. The string includes a plurality of solar cell module groups connected in series with each other. Each of the solar cell module groups includes one or a plurality of solar cell modules connected in series. The first shut-off device cuts off a connection between the plurality of solar cell module groups connected to a first electric path in response to a first control signal from the inverter. The second shut-off device is connected to the first shut-off device in a two-way communicable manner, is driven by an electrical power supplied from the first shut-off device, and cuts off a connection between the plurality of solar cell module groups connected to a second electric path in response to a second control signal from the first shut-off device.

Abstract: A solar power generation system includes a string, an inverter a first shut-off device, and a second shut-off device. The string includes a plurality of solar cell module groups connected in series. The first shut-off device is connected to a first electric path connecting between the plurality of solar cell module groups. The second shut-off device is connected to a second electric path connecting between the plurality of solar cell module groups. The first shut-off device cuts off a connection between the plurality of solar cell module groups connected to the first electric path in response to a first control signal from the inverter. The second shut-off device is driven by an electrical power supplied from the first shut-off device and cuts off a connection between the solar cell module groups connected to the second electric path in response to a second control signal from the first shut-off device.

Abstract: A solar power generation system includes a string, an inverter a first shut-off device, and a second shut-off device. The string includes a plurality of solar cell module groups connected in series with each other. The first shut-off device cuts off a connection between the plurality of solar cell module groups connected to a first electric path connecting between the plurality of solar cell module groups in response to a first control signal from the inverter. The second shut-off device is connected to the first shut-off device in a two-way communicable manner by a communication system different from power line communication and cuts off a connection between the solar cell module groups connected to a second electric path connecting between the plurality of solar cell module groups in response to a second control signal output from the first shut-off device by a communication system different from power line communication.

Abstract: The solar power generation system includes a string, an inverter, and primary and secondary shut-off devices. The primary shut-off device cuts off the string and the inverter in response to a first control signal. The secondary shut-off device cuts off a solar cell module group and another solar cell module or the inverter in response to a second control signal from the primary shut-off device. The secondary shut-off device includes a first secondary-device open-close unit in a first electric pathway, a semiconductor switching device disposed between the first secondary-device open-close unit and a solar cell module group, and a power supply unit having an anode-side terminal connected between a solar cell module group and the semiconductor switching device, which generates power to drive the third open-close unit. The semiconductor switching device enters an OFF state when power generated by the solar cell module groups falls below a predetermined threshold.

Abstract: A solar power generation system includes a string, an inverter, a first shut-off device, and a second shut-off device. The string includes a plurality of solar cell module groups. The first shut-off device is connected to a first electric path. The second shut-off device is connected to a second electric path. The first shut-off device cuts off the connection between a plurality of solar cell module groups connected to the first electric path in response to a first control signal. The second shut-off device is driven by the power supplied from the first shut-off device, and cuts off the connection between a plurality of the solar cell module groups connected to the second electric path in response to a second control signal. The first shut-off device includes a first semiconductor switching device and a first open-close unit connected in series to the first semiconductor switching device.