CONTROL METHOD AND DEVICE OF PROTECTION FUNCTION SENSITIVITY

摘要

FIELD: electricity.SUBSTANCE: invention refers to control method and device of protection function sensitivity in electric power system containing measuring device for measurement of values of a characteristic. The above protection function is configured so that action based on test value and threshold value for the characteristic can be initiated. The above test value is either measured value or value derived from the above measured values. Besides, device (9) includes calculating unit (3) configured to obtain test values and repeated performance during protection function operation of calculation of average value and deviation of test values, determination of probability of false action based on calculated average value, threshold value and calculated deviation and indication that sensitivity is too high, when probability of false action exceeds the first limit value for probability of false action.EFFECT: improving protection actuation accuracy and reliability.12 cl, 6 dwg