Patent ID: 11927643
Assignee: SIEMENS AKTIENGESELLSCHAFT
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 0:
1. A method for recognizing an electrical oscillation in an electrical power supply system, which comprises the steps of:
recognizing a start of the electrical oscillation;
determining an electrical oscillation variable for at least one measuring point in the electrical power supply system;
writing values of the electrical oscillation variable to a data buffer being operated as a circular buffer;
calculating parameters of the electrical oscillation on a basis of a time curve of the electrical oscillation variable for the at least one measuring point, the values of the electrical oscillation variable, determined after the start of the electrical oscillation, are used to calculate the parameters of the electrical oscillation;
adapting a number of successive values of the electrical oscillation variable from which the parameters of the electrical oscillation are calculated dynamically to a sequence of values of the electrical oscillation variable, wherein a length of a data window defining which of the values of the electrical oscillation variable contained in the data buffer are used to calculate the parameters is dynamically adapted to the sequence of values of the electrical oscillation variable;
deducing a presence and type of the electrical oscillation using the parameters; and

introducing a countermeasure into the electrical power supply system for damping the electrical oscillation if the electrical oscillation is determined to be an undamped electrical oscillation or having an increasing oscillation.