Method for operating electrical machines
AssigneeNordex Energy Spain, S.A.
InventorsTERESA ARLABÁN GABEIRAS, JOSE MIGUEL GARCÍA SAYÉS, RICARDO ROYO GARCÍA, MIGUEL NÚÑEZ POLO
Life of this patent
Estimating the term…
Abstract
A solution to optimally manage those requirements ensuring on the one hand, that the requirements set by the grid operators are appropriately and accurately accomplished at a point of interconnection (POI) and on the other hand, preventing the wind turbines from over fulfilling the requirements, for example, by remaining connected at voltages levels higher or lower than the ones required which, although possible, may cause higher loads and currents in the wind turbines than needed to fulfill the requirements
Claims21
A method for operating an electrical machine, said method comprising:
- coupling the electrical machine to an electric power system comprising a point of interconnection (POI) to a utility grid;
- configuring the electrical machine such that the electrical machine remains electrically connected to the electric power system during and subsequent to a voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time;
- configuring a control system such that it uses at least one algorithm to calculate an estimated voltage at the point of interconnection (POI) during a fault;
- and
- configuring the control system such as to partially disconnect the electrical machine based on the estimated voltage at the point of interconnection (POI) during a fault.
Wind turbine comprising:
- an electrical machine coupled to an electric power system comprising a point of interconnection (POI) to a utility grid;
- and
- a control system;
- wherein the electrical machine is configured such that the electrical machine remains electrically connected to the electric power system during and subsequent to a voltage amplitude of the electric power system operating outside of a predetermined range for an undetermined period of time, and
- wherein the control system is configured to use at least one algorithm to calculate an estimated voltage at the point of interconnection (POI) during a fault, and
- wherein the control system is also configured to partially disconnect the electrical machine based on the estimated voltage at the point of interconnection (POI) during a fault.
(canceled)
Dependencies are inferred from the claim text.