摘要:
A method for controlling a wind power plant comprising a plurality of wind turbine generators, wherein the method comprises: deriving an estimated value for electrical losses in the wind power plant, deriving a measured value for electrical losses in the wind power plant, based on a difference between an aggregated power production from the plurality of wind turbine generators and a power measurement at a point of common coupling; applying the estimated value for electrical losses and the measured value for electrical losses in an active power control loop, comprising a regulator; and controlling by means of the active power control loop an active power production of the wind power plant at the point of common coupling.
摘要:
Various implementations disclosed herein include a power distribution system that provides flexible and/or multi-source supply capacity in response to changes in load power demand relative to active power supply capacity, and based at least in part on a performance objective function. In some implementations, a power distribution system includes a plurality of power supplies, and a power control module connected to control the plurality of power supplies. The power supplies are configured to deliver a current to a power supply node, and are also configured to responsively adjust the current in response to a control command. The power control module provides control commands that are produced in response to threshold changes in load power demand relative to active power supply capacity provided by one or more of the plurality of power supplies, and based at least in part on a performance objective function, such as efficiency, redundancy, and demand tracking.
摘要:
Systems, methods, and devices relating to operating a power generation facility to contribute to the stability of the power transmission system. A controller operates on the power generation facility to modulate real power or reactive power or both in a decoupled manner to contribute to the stability of the power transmission system. Real power produced by the power generation facility can be increased or decreased between zero and the maximum real power available from the PV solar panels, as required by the power system. Reactive power from the power generation facility can be exchanged (injected or absorbed) and both increased or decreased as required by the power transmission system. For solar farms, the solar panels can be connected or disconnected, or operated at non- optimal power production to add or subtract real or reactive power to the power transmission system.
摘要:
Die Erfindung betrifft ein Verfahren zum Einspeisen elektrischer Leistung (P S ) in ein elektrisches Versorgungsnetz (120) mittels wenigstens eines ersten und eines zweiten Windparks (112). Es wird eine erste elektrische Parkleistung (P P1 ) durch den ersten Windpark (112) zum Einspeisen in das elektrisches Versorgungsnetz (120) und eine zweite elektrische Parkleistung (P P2 ) durch den zweiten Windpark (112) zum Einspeisen in das elektrische Versorgungsnetz (120) bereitgestellt und eine Summenleistung (P S ) aus wenigstens der ersten und zweiten Parkleistung (P P1 , P P2 ) erzeugt und in das elektrische Versorgungsnetz (120) eingespeist, wobei eine Zentralsteuereinheit (2) zum Steuern der eingespeisten Summenleistung das Bereitstellen der wenigstens ersten und zweiten Parkleistung (P P1 , P P2 ) steuert.
摘要:
A multi-farm wind power dispatch management system is provided which includes wind turbine dispatch controllers for controlling wind power dispatch of respective wind farm components and wind farm dispatch management systems for receiving respective wind farm component operating parameters and generating respective farm-level operating parameters. The system also includes group dispatch management systems for receiving the farm-level operating parameters and generating respective group level operating parameters. The system also includes a master dispatch management system for receiving the group-level operating parameters; computing a real time output power generated by the wind farm components; determining a difference between the real time output power and a committed output power; and generating reference commands, based on the difference, for controlling at least one of, the wind farm component operating parameters, the farm-level operating parameters, the group level operating parameters, or combinations thereof to reduce the difference and dispatch the committed output power.
摘要:
In order to stabilize the system voltage in a network section (1) that is connected via a device with a variable voltage transformation ratio to a higher-level network (3) and that comprises at least one energy consumption and/or generation unit (8, 10, 11), the voltage transformation ratio is varied in order to vary a system voltage level in the network section (1). At least in one mode of the method, the system voltage level is increased in order to counteract an increase in the system voltage at the energy consumption and/or generation unit (8, 10, 11), and/or the system voltage level is lowered in order to counteract a decrease in the system voltage at the energy consumption and/or generation unit (8, 10, 11). This is effectively possible because the power consumption and/or output of each energy consumption and/or generation unit (8, 10, 11) in the network section is controlled via a characteristic curve of the system voltage present there, the characteristic curve raising the power consumption of the energy consumption and/or generation unit (8, 10, 11) with an increasing system voltage and lowering the power output of the energy consumption and/or generation unit (8, 10, 11) with increasing system voltage.
摘要:
We describe a modular adjustable power factor renewable energy inverter system (400). The system comprises a plurality of inverter modules (404) having a switched capacitor across its ac power output, a power measurement system coupled to a communication interface, and a power factor controller to control switching of the capacitor. A system controller (410) receives power data from each inverter module (404), sums the net level of ac power from each inverter (404), determines a number of said capacitors to switch based on the sum, and sends control data to an appropriate number of the inverter modules (404) to switch the determined number of capacitors into/out of said parallel connection across their respective ac power outputs.
摘要:
A controller is disclosed for hybrid systems providing power to an electrical power grid. The controller reduces wear on hybrid systems by having only a fast unit tuned to track fluctuations of a regulation signal in a normal mode of operation. By contrast, the slow unit does not track fluctuations in the regulation signal in the normal mode of operation, which reduces wear on the slow unit. The normal mode of operation is defined by an energy range of the fast unit. Energy band parameters associated with the energy range can be dynamically modified in order to optimize the efficiency of the hybrid system.
摘要:
A method is for regulating system frequency in a weak power system (10). The weak power system includes a power generator (12), a static synchronous compensator (14) and an energy storage device (16), where the weak power system (10) is connected to an electrical network (22) and the power generator (12) is operable to generate power for presentation to the electrical network (22). The method comprises the steps of: following a change in load of the electrical network (22), simultaneously modifying a power output of the power generator (12) to match the load of the electrical network (22) and operating the static synchronous compensator (14) to control the energy storage device (16) to either supply real power to the electrical network (22) or absorb real power from the power generator (12).