OpenDSS-Based Harmonic Power Flow Analysis for Distribution Systems With Passive Power Filters

The open distribution system simulator (OpenDSS) is open-source software developed by the Electric Power Research Institute (EPRI) in the United States for analyzing distribution systems. OpenDSS is primarily used in distribution systems for fundamental power flow (FPF) and harmonic power flow (HPF). Single-tune and high-order filters are generally combined to achieve a better harmonic filtering performance in practical harmonic analysis applications. However, OpenDSS requires high-order filter models. This hinders the simulation of comprehensive and reliable filtering results. Moreover, HPF calculation errors occur when shunt components and power systems exhibit harmonic resonance. This paper proposes passive power filter models based on the injected current technique to compensate for the deficiency of high-order filters in OpenDSS. Furthermore, the proposed method can effectively prevent parallel harmonic resonance errors. This results in higher accuracy and practicability of the HPF and passive power filters (PPFs) models in distribution systems.