Abstract:
A system and method are provided for controlling a power generating system having a power generating subsystem connected to a point of interconnection (POI). A first and a second data signal are obtained corresponding to a feedback signal of an electrical parameter regulated at the POI, the second data signal having a signal fidelity that is higher than that of the first data signal. A correlation value between the first and second data signals is obtained by filtering a value difference between the first and second data signals and is applied to a setpoint value for the electrical parameter regulated at the POI. The modified setpoint value and the second data signal are combined to generate a setpoint command for the power generating subsystem that is used for controlling generation of power at the power generating subsystem to regulate the electrical parameter at the POI.
Abstract:
A system and method are provided for controlling a wind farm. Accordingly, a demand signal is received from the electrical grid. The farm-level controller also receives a plurality of capability metrics from each wind turbines, which include, at least, a steady-state power availability, a transient power availability and a responsive capability of each wind turbine. The farm-level controller determines a power production capability profile for each wind turbine and determines the availability of each wind turbine to meet at least a portion of the demand signal based on the power production capability profiles. The farm-level controller also determines which portion of the demand signal to be satisfied by each wind turbine based on the availability and the power production capability for each wind turbine.
Abstract:
A method for operating a renewable energy facility having a plurality of power sources includes defining a plurality of modes of operation for each of the plurality of power sources. The method also includes receiving one or more required active power set points for the renewable energy facility and/or groups of the plurality of power sources. Further, the method includes determining an operating mode command that defines which of the plurality of modes of operation to use for each of the plurality of power sources to reach the one or more required active power set points. Moreover, the method includes dynamically switching into the plurality of modes of operation defined in the operating mode command.
Abstract:
A method for automatically controlling a renewable energy facility having a plurality of power sources includes operating, via a farm-level controller, the hybrid renewable energy facility at a first farm-level power set point. The method also includes modifying, via the farm-level controller, the first power set point to a second farm-level power set point. In response to modifying the first power set point to the second farm-level power set point, the method includes generating one or more power change requests for individual controllers of the plurality of power sources. Further, the method includes generating a power output via the plurality of power sources so as to transfer power generation from one of the plurality of power sources to another while minimizing the impact on farm-level production.
Abstract:
A solar power conversion system includes a photovoltaic array having photovoltaic modules for generating direct current (DC) power. A power converter in the system converts the DC power to alternating current (AC) power. The AC power is transmitted to the power grid via a transformer coupled between the power converter and the power grid. The transformer is connected to the power grid at the point of common coupling (PCC) and to the power converter at output terminals. A voltage estimation module is configured to estimate a voltage at PCC based on a measured voltage magnitude, a measured real power and a measured reactive power at the output terminals, and a reactance of the transformer. A controller is provided in the system for generating switching command signals for the power converter based on the voltage at PCC.
Abstract:
A cooling system for cooling a temperature-dependent power device includes an active cooling device and a controller to generate and transmit a drive signal thereto to selectively activate the device. The controller receives an input from sensors regarding the cooling device power consumption and measured operational parameters of the power equipment—including the power device output power if the device is a power producing device or the power device input power if the device is a power consuming device. The controller generates and transmits a drive signal to the cooling device based on the cooling device power consumption and the measured power device input or output power in order to cause the active cooling device to selectively cool the heat producing power device. A net system power output or total system power input can be maximized/minimized by controlling an amount of convection cooling provided by the cooling device.