A method, an apparatus, and a system for monitoring an islanding electricity generation unit are provided. The method includes determining an islanding electricity generation unit in a renewable energy station on the basis of collected electrical capacity at critical electrical nodes of the renewable energy station, and controlling a switch device corresponding to the determined islanding electricity generation unit to sever connection between the electricity generation unit and a collector line. The critical electrical nodes include nodes that have a collecting effect on grid-connected current of the electricity generation units of the renewable energy station, and each collector line being constructed to collect grid-connected current from at least one electricity generation unit and input same into a main transformer of the renewable energy station.

A method, an apparatus, and a system for monitoring an islanding electricity generation unit are provided. The method includes determining an islanding electricity generation unit in a renewable energy station on the basis of collected electrical capacity at critical electrical nodes of the renewable energy station, and controlling a switch device corresponding to the determined islanding electricity generation unit to sever connection between the electricity generation unit and a collector line. The critical electrical nodes include nodes that have a collecting effect on grid-connected current of the electricity generation units of the renewable energy station, and each collector line being constructed to collect grid-connected current from at least one electricity generation unit and input same into a main transformer of the renewable energy station.

A power storage control system includes a storage battery and a controller. The storage battery supplies electric power to an electric power system in collaboration with a power generator in response to a command value. The controller outputs, to the power generator, a stop signal causing the power generator to stop power generation when a state of charge of the storage battery is larger than a given value. The controller outputs, to the power generator, an execution signal causing the power generator to execute power generation when the state of charge is not larger than the given value. The controller acquires an actual electric power value generated by the power generator. The controller outputs a control signal causing the storage battery to execute charging and discharging for satisfying the command value on the basis of a difference between the command value and the actual electric power value.

An interface performs power delivery and communication with an external apparatus. A convert device is configured to convert a voltage of input power that is supplied from the external apparatus through the interface. A convert device includes a first convert device having first conversion efficiency and a second convert device having second conversion efficiency different from the first conversion efficiency. A processing device is configured to operate by using power converted by the convert device. A controller is configured to switch a conversion state between: a first conversion state of converting, by the first convert device, the input power supplied from the external apparatus through the interface and supplying the converted input power to the processing device; and a second conversion state of converting, by the second convert device, the input power supplied from the external apparatus through the interface and supplying the converted input power to the processing device.

An interface performs power delivery and communication with an external apparatus. A convert device is configured to convert a voltage of input power that is supplied from the external apparatus through the interface. A convert device includes a first convert device having first conversion efficiency and a second convert device having second conversion efficiency different from the first conversion efficiency. A processing device is configured to operate by using power converted by the convert device. A controller is configured to switch a conversion state between: a first conversion state of converting, by the first convert device, the input power supplied from the external apparatus through the interface and supplying the converted input power to the processing device; and a second conversion state of converting, by the second convert device, the input power supplied from the external apparatus through the interface and supplying the converted input power to the processing device.

A power system may comprise a plurality of power sources, each connected to a corresponding power regulator. The power regulators may be connected in series or in parallel, and may form a string. Each power regulator may comprise input terminals connected to the corresponding power source, output terminals, and a power converter that may be configured to convert input power from the corresponding power source to output power. The power regulator may further comprise a regulator communications module that may be configured to receive a power regulation indication relating to regulating an operational characteristic of the power regulator. The regulator controller may be configured to instruct the power converter to increase or decrease the regulator operational characteristic based on the power regulation indication, and based on power production characteristics of the power regulator.

A power system may comprise a plurality of power sources, each connected to a corresponding power regulator. The power regulators may be connected in series or in parallel, and may form a string. Each power regulator may comprise input terminals connected to the corresponding power source, output terminals, and a power converter that may be configured to convert input power from the corresponding power source to output power. The power regulator may further comprise a regulator communications module that may be configured to receive a power regulation indication relating to regulating an operational characteristic of the power regulator. The regulator controller may be configured to instruct the power converter to increase or decrease the regulator operational characteristic based on the power regulation indication, and based on power production characteristics of the power regulator.

A method and a system for dispatching an independent energy storage power station is provided. The method includes: determining the current typical secondary frequency regulation scenario according to the predicted AGC frequency regulation instruction for the next stage; dispatching, for the continuous upward adjustment response scenario, the independent energy storage power station to participate in the upward adjustment response according to the data required for the continuous upward adjustment; dispatching, for the continuous downward adjustment response scenario, the independent energy storage power station to participate in the downward adjustment response according to the data required for the continuous downward adjustment; and preferably, for the upward and downward adjustment fluctuation response scenario, dispatching the independent energy storage power station to participate in the upward and downward adjustment fluctuation response according to the data required for the upward and downward adjustment.

The present invention relates to an optimizer, for a solar string power generation system, comprising an Injection Circuit (IC), connected to at least one string, from an array of strings of solar panels, wherein the output of said IC is connected to the DC bus of the solar inverter. The IC comprises: (i) an MPPT mechanism, for finding the MPP of the connected string; (ii) a DC/DC converter, for converting part of the power of said connected string; wherein the DC/DC converter, converts only a part of the power of the string, that is connected to the IC, when the string is impaired, for compensating for the relative voltage difference between the voltage MPP, of the impaired string, and the MPP voltage of the DC bus of the solar inverter and the array of strings.

A method, apparatus, system and computer program is provided for controlling an electric power system, including implementation of a voltage control and conservation (VCC) system used to optimally control the independent voltage and capacitor banks using a linear optimization methodology to minimize the losses in the EEDCS and the EUS. An energy validation process system (EVP) is provided which is used to document the savings of the VCC and an EPP is used to optimize improvements to the EEDCS for continuously improving the energy losses in the EEDS. The EVP system measures the improvement in the EEDS a result of operating the VCC system in the “ON” state determining the level of energy conservation achieved by the VCC system. In addition the VCC system monitors pattern recognition events and compares them to the report-by-exception data to detect HVL events. If one is detected the VCC optimizes the capacity of the EEDS to respond to the HVL events by centering the piecewise linear solution maximizing the ability of the EDDS to absorb the HVL event.