Reactive power regulation
AssigneeAlstom Wind, S.L.U.
InventorsMontserrat Mata Dumenjó, Jordi Carulla Piera, Oriol Gomis Bellmunt
Life of this patent
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Abstract
The present invention relates to a method of reactive power regulation in a wind turbine comprising a local reactive power control system adapted to operate in a central control mode and a local control mode, a method of reactive power regulation in a wind park connected to an electrical grid, and to a wind park.
Claims29
A method of reactive power regulation in a wind park connected to an electrical grid:
- the wind park comprising a plurality of wind turbines and a central reactive power control system, wherein at least a first portion of the plurality of wind turbines each comprise a local reactive power control system adapted to work in a central control mode and a local control mode, wherein
- the central reactive power control system sends commands indicative of local reactive power demands to the local reactive power control systems in accordance with at least one measured variable of the grid, and wherein
- in a central control mode, the local reactive power control system operates the wind turbine to generate reactive power in accordance with the commands received from the central reactive power control system, and wherein
- in a local control mode, the local reactive power control system determines an amount of reactive power to be generated and controls the wind turbine to generate said amount of reactive power regardless of the commands received from the central reactive power control system.
A method of reactive power regulation implemented in a local reactive power control system of a wind turbine comprising:
- receiving commands indicative of a local reactive power demand from a wind park central reactive power control system,
- obtaining a maximum and a minimum local voltage,
- obtaining an instantaneous value of the local voltage from a measuring device and comparing said instantaneous value for the local voltage with the maximum and minimum local voltage, and
- sending control commands to at least one wind turbine component for generating the maximum available inductive reactive power if the local voltage is more than the maximum voltage, and
- sending control commands to at least one wind turbine component for generating the maximum available capacitive power if the local voltage is less than the minimum local voltage.
A wind park connected to an electrical grid and comprising a plurality of wind turbines, wherein
- at least a portion of the plurality of wind turbines each comprises a local reactive power control system capable of controlling the reactive power the wind turbine generates, the wind park further comprising:
- a central reactive power control system capable of determining commands indicative of local reactive power demands for each of the local reactive power control systems in response to at least one measured variable of the grid, and sending the commands to the local reactive power control systems, and
- the local reactive power control systems being adapted to work in a central control mode and a local control mode, wherein
- in a central control mode, the local reactive power control system controls the corresponding wind turbine to generate reactive power in accordance with a command received from the central reactive power control system, and wherein
- in a local control mode, the local reactive power control system determines an amount of reactive power to be generated by the corresponding wind turbine and controls the wind turbine to generate said amount of reactive power.
Dependencies are inferred from the claim text.