Load Impedance Modeling In Harmonic Analysis: Etap Knowledge Base

ETAP Knowledge Base

Load Impedance Modeling in Harmonic Analysis Description: Modeling load impedance with no harmonic production capability Category:

Harmonic Analysis

Type:

Simulation

Keywords:

Harmonic Analysis, HA, No Harmonic

Q: When a load is modeled that has no harmonic producing capability, how does ETAP model that load with regard to power factor? A: Loads are modeled as a parallel circuit g+jb, where g is an equivalent conductance based on the active power P and is a constant, and b is an equivalent susceptance based on the reactive power Q and is adjusted by the harmonic order (capacitive load and inductive load are treated differently). If a load is modeled by different power factors, P and Q will be different, thus g and b will be different. The equivalent bus peak impedance therefore will be different.

This document is confidential and proprietary to Operation Technology, Inc. and may not be reproduced, published or disclosed to others without the written authorization of Operation Technology, Inc., 17 Goodyear, Suite 100, Irvine, CA 92618, USA. © 2010 by Operation Technology, Inc. All Rights Reserved.

© Operation Technology, Inc.

Page 1 of 1

ETAPKB