Critical evaluation of the performance of the method of harmonic power flow to determine the dominant source of distortion

Capacitor switching methodology for responsibility sharing of harmonic voltage distortions

“…In this panorama, a procedure based on harmonic power flow analysis is not committed to defining portions of responsibility but concentrates on the identification of the agent considered as the major cause of the distortion at the point of interest. However, investigations have already shown evident inconsistencies related to the responses given through this method, when faced with detailed evaluations that involve phase angle variations that already exist on the bus under analysis …”

Dominant impedance method to assign harmonic voltage contributions at a point of common coupling

“…Even though this methodology is employed in some measuring equipment, some studies, concerned with evaluating the reliability of the process, demonstrate tangible fragilities regarding its application. 6,7 Other methods, as the conforming and non-conforming current 8,9 procedure and a proposal based on the capture and treatment of voltage and current waveforms at the interest point, 10 although very interesting and practical at first sight, showed inconsistencies in their development when subjected to performance evaluations. 11 Furthermore, several studies employ resources such as neural networks, state estimation, linear regression, and statistics, among others.…”

Assignment of harmonic voltage contributions using the harmonic current injection method

“…An analysis of the literature revealed that efforts have been made in different lines of research associated with this subject. In fact, there are proposals 8‐13 with strong inconsistencies in their physical principles, as evidenced in different performance evaluation studies 14‐16 . In addition, many studies use mathematical and computer resources such as neural networks, state estimation and among others 17,18 .…”