METHOD OF CONTROLLING A WIND TURBINE CONNECTED TO AN ELECTRIC UTILITY GRID DURING MALFUNCTION IN SAID ELECTRIC UTILITY GRID, CONTROL SYSTEM, WIND TURBINE AND FAMILY HEREOF

摘要

The invention relates to a method of controlling a wind turbine connected toan electric utility grid during malfunction in said electric utility grid,said method comprising the steps of detecting a malfunction in said electricutility grid and monitoring at least one physical work property of at leastone component of said wind turbine. Further, the method controls the pitch ofone or more win turbine blades of said wind turbine in order too keep saidleast one physical work property below at least one predefined limit in a timeperiod of said malfunction. The invention also relates to a control system fora wind turbine connected and supplying electric power to a utility grid aswell as a wind turbine and park hereof.