Patent ID: 7881888
Filing Date: 2011-02-01
Classification: H02H,H02J,Y02E,Y04S

Abstract:
1. A method for determining location of faults in a wind power plant comprising a plurality of wind turbines arranged in n groups, each group comprising m n wind turbines electrically arranged in series, each of the wind turbines having a fault detector and a timing device for recording a time of fault occurrence, all groups electrically connected via a bus bar, the method comprising: detecting a fault; communicating a fault indication from each fault detector and a time of fault occurrence from each timing device as a status indicator from each of the fault detectors and timing devices to a monitoring unit; in response to detecting the fault, evaluating the time of fault occurrence for two wind turbines in each of the n groups with the monitoring unit to determine whether the detected fault has occurred inside one of the n groups; evaluating with the monitoring unit whether a fault indication is registered in the wind turbine closest to the bus bar in each group; and in response to the evaluations, causing the monitoring unit to make a control decision for the wind turbines of the wind power plant.