Harmonic Source Identification Using Modified Power Direction Method

In this paper harmonic source identification has been done using active power direction method with the study of distortion caused by loads at the system nodes. The active power direction method is being continuously used until present date with required modifications and integration with other techniques in order to improve its application for the purpose of harmonic source detection. The effect of disturbing loads at the nodes renders significant information regarding the type of load connected to it. A comparative study of distorting and non-distorting portion of load parameters along with the power direction analysis is used as an effective tool to identify harmonic sources present in the system, better performance can be witnessed in this work on various test cases where power direction method fails. The effectiveness of the proposed technique has been tested on a modified IEEE 5 bus system and IEEE 9 bus system.