This application discloses a protection apparatus and a protection method for a photovoltaic power generation system and a photovoltaic power generation system, and relates to the field of photovoltaic power generation technologies. The protection apparatu...

An apparatus and method for protection in power installations are disclosed. The apparatus includes a power converter (505,605) configured to convert input power to direct-current output power on a power converter output terminal, the power converter compr...

A switching element (26) comprising: an extinguishing branch (28); a switching branch (30) including at least one semiconductor switch (34) switchable to selectively allow current to flow in the switching branch (30) or commutate current from the switching...

There is provided a grounding apparatus capable of instantaneously opening the current path when a complete grounding fault occurs between the ground point and the ground line, which is provided between a solar cell and an inverter, or opening the current ...

A control method for low voltage ride through comprises the following steps: 1)A control circuit (9) monitors a DC bus voltage of a set of frequency converters (3, 4) connected between a wind generator rotor and a power grid (12) and a voltage of the power...

A DC distribution board comprises, therein as internal devices, a circuit breaker 5 provided along each of branch lines branched from main wires of a direct-current power supply, and a controller 6 for controlling switching of the breaker 5. The circuit br...