| 摘要 |
Wind farm comprising a farm master (1) and a plurality of wind energy installations (4). The farm master (1) has a controller (15) with an input for a control parameter for power supplied to a grid and transmits desired value specifications to a local controller (5) of the wind energy installations (4). According to the invention, the local controller (5) has dual structure and comprises a desired value channel (6), to which the desired value specification is applied by the farm master (1) and which is designed to output a stationary reactive power desired value, and a responsive channel (7) comprising an autonomous controller (75), to which no desired value specification is applied by the farm master (1) and to which an actual voltage of the particular wind energy installation (4) is applied via a washout filter (71). The autonomous controller (75) with the washout filter (71) enables a fast and dependent response to transient disturbances, in particular voltage spikes and voltage dips as a result of a short circuit. The individual wind energy installation and the wind farm as a whole therefore gain a behaviour which is identical to a synchronous generator and is very favourable for grid stability in the event of voltage disturbances. |
| 主权项 |
1. A wind farm comprising a farm master (1), a farm grid (3) and a plurality of wind turbines (4) for feeding power to a grid (99) in accordance with a control parameter, wherein the farm master (1) has a controller (15) comprising an input for the control parameter and an input for the actual value for the fed power, and an output unit (16), which outputs setpoint value presets to the wind turbines (4), wherein the wind turbine (4) has a generator driven by a wind rotor (40) and comprising a converter (45) for generating electrical energy and outputting said energy to the farm grid (3) and a local controller (5) for the setpoint value preset applied by the farm master (1),
characterized in that the local controller (5) has a double structure and comprises a setpoint value channel (6), at which the setpoint value preset is applied by the farm master (1) and which is designed to output a steady-state setpoint reactive power value, and a responsive channel (7), which comprises an autonomous controller (75), at which no setpoint value preset is applied by the farm master (1), and to which an actual voltage of the respective wind turbine (4) is applied via a washout filter (71), and an aggregator (67) for the setpoint value channel and the responsive channel for output to the converter (45). |
