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METHOD FOR DETECTING LOW-FREQUENCY OSCILLATIONS AND DETECTION DEVICE FOR SAME
METHOD FOR DETECTING LOW-FREQUENCY OSCILLATIONS AND DETECTION DEVICE FOR SAME
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机译:低频振荡检测方法及其相同的检测装置
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摘要
The invention relates to a method for detecting low-frequency oscillations, more particularly subsynchronous resonances, in an electrical supply network (306), wherein the electrical supply network (306) has a mains voltage with a rated network frequency, which method comprises the steps of: detecting at least one electrical signal of the electrical supply network (306) and evaluating the electrical signal by means of a wavelet analysis in which a time-dependent frequency pattern (420) is created by way of a correlation analysis of the detected signal with a predetermined wavelet mother function (502), wherein the presence of a low-frequency oscillation is assumed if at least one further low frequency component is present in the time-dependent frequency pattern (420) in addition to a basic component.
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