DIGITAL SIGNAL-PROCESSING ALGORITHMS FOR POWER AND LINE PARAMETER MEASUREMENTS WITH LOW SENSITIVITY TO FREQUENCY CHANGE
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This paper introduces a new approach to definition of digital signal processing algorithms using bilinear form representation. The new algorithms are used to calculate power and line parameter values based on the current and voltage samples. The bilinearform approach provides a convenient methodology for optimal design of digital signal processing algorithms. This feature is utilized to design digital algorithms for power and line parameter measurements with low sensitivity to system frequency change. Several different algorithms are defined and their performance is investigated by testing their sensitivity to system frequency change. Various sampling rates and different data windows are utilized to define several test cases. 1990 IEEE