Wind power generating equipment includes: a generator that is driven by a blade which rotates by receiving the wind; a power converter that converts an electric output of the generator such that the output is interconnected with an electric power system; a power converter controller that controls the power converter; and a wind turbine control board that transmits, to the power converter controller, an active power command value that is used as a command value of the electric output which is transmitted from the power converter. The power converter controller controls the output of the power converter in response to an active power command value, depending on a reduction amount of a system voltage when instantaneous reduction occurs in the system voltage interconnected with the wind power generating equipment. This permits stable operation of the wind power generating system when instantaneous voltage reduction occurs such as during a system abnormality.

Disclosed are a power optimization method and an apparatus therefor, and a photovoltaic device and a photovoltaic system. The power optimization of a photovoltaic assembly can be realized when a series connection architecture or a parallel connection architecture is used for the photovoltaic assembly. The method includes: power optimization apparatuses carrying out MPPT processing on photovoltaic assemblies according to operating parameters of the photovoltaic assemblies corresponding to the power optimization apparatuses on a one-to-one basis (101); and controlling the photovoltaic assemblies according to MPPT processing results so that power states of the photovoltaic assemblies are optimized (102). By means of providing a power optimization apparatus for each photovoltaic assembly, the power optimization apparatus carries out MPPT processing on the corresponding photovoltaic assembly, thereby preventing the occurrence of power mismatch.

Disclosed are a power optimization method and an apparatus therefor, and a photovoltaic device and a photovoltaic system. The power optimization of a photovoltaic assembly can be realized when a series connection architecture or a parallel connection architecture is used for the photovoltaic assembly. The method includes: power optimization apparatuses carrying out MPPT processing on photovoltaic assemblies according to operating parameters of the photovoltaic assemblies corresponding to the power optimization apparatuses on a one-to-one basis (101); and controlling the photovoltaic assemblies according to MPPT processing results so that power states of the photovoltaic assemblies are optimized (102). By means of providing a power optimization apparatus for each photovoltaic assembly, the power optimization apparatus carries out MPPT processing on the corresponding photovoltaic assembly, thereby preventing the occurrence of power mismatch.

A power conditioning system (PCS) includes: a grid blackout determiner, a voltage controller, and a processor electrically connected to the grid blackout determiner and the voltage controller. The processor is configured to identify a state of a grid as a blackout state or an unstable state based on at least one of an amplitude or a frequency of a voltage of the grid that is detected by the grid blackout determiner, control the voltage controller to adjust, based on the identified state of the grid being the blackout state or the unstable state, load voltage input to the voltage controller to be equal to a command voltage, and adjust, based on the identified state of the grid being the blackout state or the unstable state, a first frequency of the detected voltage of the grid to a second frequency that is different from the first frequency.

A power conditioning system (PCS) includes: a grid blackout determiner, a voltage controller, and a processor electrically connected to the grid blackout determiner and the voltage controller. The processor is configured to identify a state of a grid as a blackout state or an unstable state based on at least one of an amplitude or a frequency of a voltage of the grid that is detected by the grid blackout determiner, control the voltage controller to adjust, based on the identified state of the grid being the blackout state or the unstable state, load voltage input to the voltage controller to be equal to a command voltage, and adjust, based on the identified state of the grid being the blackout state or the unstable state, a first frequency of the detected voltage of the grid to a second frequency that is different from the first frequency.

A control device is provided with: a power transfer control means that controls power transfer to and from a DC distribution network; and an exchange means that exchanges, with respect to transfer power to and from the DC distribution network, information indicating an attribute based on a power generation scheme.

A control device is provided with: a power transfer control means that controls power transfer to and from a DC distribution network; and an exchange means that exchanges, with respect to transfer power to and from the DC distribution network, information indicating an attribute based on a power generation scheme.

A system and method for combining power from DC power sources. Each power source is coupled to a converter. Each converter converts input power to output power by monitoring and maintaining the input power at a maximum power point. Substantially all input power is converted to the output power, and the controlling is performed by allowing output voltage of the converter to vary. The converters are coupled in series. An inverter is connected in parallel with the series connection of the converters and inverts a DC input to the inverter from the converters into an AC output. The inverter maintains the voltage at the inverter input at a desirable voltage by varying the amount of the series current drawn from the converters. The series current and the output power of the converters, determine the output voltage at each converter.

A system and method for combining power from DC power sources. Each power source is coupled to a converter. Each converter converts input power to output power by monitoring and maintaining the input power at a maximum power point. Substantially all input power is converted to the output power, and the controlling is performed by allowing output voltage of the converter to vary. The converters are coupled in series. An inverter is connected in parallel with the series connection of the converters and inverts a DC input to the inverter from the converters into an AC output. The inverter maintains the voltage at the inverter input at a desirable voltage by varying the amount of the series current drawn from the converters. The series current and the output power of the converters, determine the output voltage at each converter.

A facility receives an indication of a rate of energy output sought from a production array of solar panels. The facility controls a power inverter to which the production array is connected to deliver to an electrical grid to which the power inverter is connected a rate of energy output that is based on the indicated rate of energy output.