Power control of a wind farm and method thereof
View Patent ↗A wind farm includes a plurality of wind energy installations which generate electrical energy to be output to a power supply system and a wind farm master for controlling the wind energy installations. Each wind energy installation includes a generator which is driven by a rotor, and the wind farm master includes a power control device having a plurality of loops. This plurality of loops includes a fast loop that includes a controller which acts on a first group of the wind energy installations and a slow loop that includes a controller which acts on a second group of the wind energy installations, the fast controller having a substantially higher dynamic than the slow controller.
1. A wind farm having a plurality of wind energy installations which generate electrical energy to be output to a power supply system and a wind farm master for controlling the wind energy installations,
the wind energy installations each comprising a generator which is driven by a rotor, and the wind farm master comprising a power control device having a plurality of loops,
wherein the wind energy installations are divided into at least a first group and a second group, the first group being distinct from the second group, and
the plurality of loops comprises a fast loop comprising a controller which acts on the first group of the wind energy installations and a slow loop comprising a controller which acts on the second group of the wind energy installations, the fast controller and the slow controller being configured differently in that parameters of the fast controller are set to a higher dynamic than those of the slow controller.
2. The wind farm of claim 1 , wherein the fast and the slow loop are cascaded.
3. The wind farm of claim 2 , wherein an actuating signal generated by the fast controller is connected as a reference signal to the slow controller.
4. The wind farm of claim 1 , 2 or 3 , wherein the power control device is a wattless power controller.
5. The wind farm of claim 1 , 2 or 3 , wherein the fast controller is configured to act directly on converters in the first group of wind energy installations.
6. The wind farm of claim 5 , wherein an output of the fast controller is connected on the converters via separate transmission lines.
7. The wind farm of claim 5 , an output of the fast controller is configured to act on the converters via a separate high-speed data network.
8. The wind farm of claim 1 , 2 or 3 , wherein the first group of wind energy installations is arranged electrically closer than the second group of wind energy installations to a connection point to the power supply system.
9. The wind farm as claimed of claim 1 , 2 or 3 , wherein the fast controller is designed to compensate for faults, and the slow controller is designed for steady-state accuracy.
10. The wind farm as claimed of claim 1 , 2 or 3 , wherein the power control device is configured to receive a reference variable via a control input for input values.
11. A method for operating the wind farm of claim 1 , 2 or 3 , comprising:
writing an input value,
calculating set values for electrical power of the wind energy installations to be output to the power supply system in accordance with a control algorithm, and
outputting the set values to the wind energy installations,
wherein the calculating of the set values comprises:
calculating a first desired value for a power to be output of the first group of wind energy installations in a first loop of the control algorithm, and calculating a second desired value for the second group of wind energy installations in a second loop of the control algorithm, a higher dynamic being provided for the first loop than for the second loop.
12. A wind farm having a plurality of wind energy installations which generate electrical energy to be output to a power supply system and a wind farm master for controlling the wind energy installations,
the wind energy installations each comprising a generator which is driven by a rotor, and the wind farm master comprising a power controller,
wherein the wind energy installations are divided into at least a first group and a second group, the first group being distinct from the second group, and
the controller has a multi-loop structure including a slow loop which acts on the second group and a fast loop which acts on the first group, the fast loop and the slow loop being configured differently in that parameters of the fast loop are set to a higher dynamic than those of the slow loop.
13. A method for operating a wind farm having a plurality of wind energy installations which generate electrical energy to be output to a power supply system and a wind farm master for controlling the wind energy installations, the wind energy installations each comprising a generator which is driven by a rotor, the wind energy installations being divided into at least a first group and a second group, the first group being distinct from the second group, and the wind farm master comprising a power control device, the method comprising:
writing an input value,
calculating set values for electrical power of the wind energy installations to be output to the power supply system in accordance with a control algorithm, and
outputting the set values to the wind energy installations,
wherein the calculating of the set values comprises:
calculating a first desired value for a power to be output of the first group of the wind energy installations in a first loop of the control algorithm, and
calculating a second desired value for the second group of the wind energy installations in a second loop of the control algorithm, wherein the first loop and the second loop are configured differently in that parameters of the first loop are set to a higher dynamic than those of the second loop.