Windows to reduced leakage and interference without any influence on harmonic components of phasor and power flow measurements

The changes in the electricity grid pose new challenges for the measurement of power flows in the grid. The non-linear behavior on both the generation and load side can lead to the simultaneous observation of reversed power flows on different harmonics on one line. In order to gain a comprehensive understanding of the power flows, it is necessary to measure the harmonic components separately. This requires the measurement of voltage and current with usable phase information, such as in harmonic phase measurement. In conjunction with a fluctuating fundamental frequency, leakages occur in existing technologies, which devalue the phase information of the harmonics. In order to eliminate the symptoms of this problem, increasingly complex methods are used or the phase information is often omitted altogether.