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Harmonics

Harmonic Analysis

概要

With the Harmonic Analysis module, you can simulate harmonic current and voltage sources, identify harmonic problems, reduce nuisance trips, design and test filters, and report harmonic voltage and current distortion limit violations.

Comprehensive load flow and frequency scan calculations are performed using detailed harmonic source models and power system component frequency models. Results are shown graphically, including harmonic order, harmonic spectrum plots, and harmonic waveform plots, as well as Crystal Reports.

Complied Harmonic Standards:

IEEE 519
ANSI/IEEE 399
IEEE 141
IEEE 519-2014 - MV / HV / EHV
IEC 61000-3-14 - LV
IEC 61000-3-6
IEEE Standard 519-1992
IEEE Standard 519-2022
IEEE Std 3002.8,
IEEE Std 1547-2018,
IEEE Std 2800-2022
IEEE Std. 1531-2020

Harmonic Analysis Software Key Features

Harmonic Frequency Scan Software
Harmonic Filters & Sizing Software
Rule book for voltage and current distortion
Harmonic voltage and current distortion evaluation (THD & IHD)
Harmonic telephone influence factors (TIF & I*T)
Automatic alerts of harmonic violations
Typical and user definable harmonic sources library
Variable Frequency Drive (VFD) harmonic modeling
UPS AC input and output harmonic modeling
Photovoltaic array inverter harmonic modeling
WTG Type 4 harmonic modeling
Harmonic Grid Code Compliance
Embedded Newton-Raphson and Gauss-Seidel load flow methods
Harmonic current injection method
Integrated with cable sizing in order to size cables based on harmonic load flow
Transformer and cable derating alerts
Transformer K-Factor Calculation
Total Rated Distortion alerts for branches at reference point of applicability when IBRs and DERs are installed
User definable interharmonic page in the harmonic source library

Harmonic Load Flow Capabilities

User-expandable harmonic source library
Modeling voltage & current harmonic sources
Considering both harmonic source magnitudes & phase angles
Global, local & individual location compliance rule book for voltage & current distortion
Harmonic source based spectrum or device parameters
Transformer K-Factor calculation
Temperature-dependent line & cable resistances
Automatic adjustment of equipment impedance to harmonic frequency
Includes phase shifting transformers
Built-in single-tuned, high-pass, & band-pass harmonic filter models
Size and tune passive harmonic filters to shift resonance points to less harmful frequencies
Identify harmonic distortion problems
Identify & analyze telephone interference problems by harmonics
Identify parallel resonance conditions
Fundamental load flow results
IEEE 519 defined harmonic indices
Skin effect models for motors & transformers
TDD and TRD current distortion limit evaluation
Enhanced load equipment cable modeling
Voltage and Current distortion alerts with percentile multipliers
Total & harmonic voltage & current
Harmonic Distortions (THD & IHD)
Root Mean Square Values (RMS)
Voltage Arithmetic Summation (ASUM)
Telephone Interference Factor (TIF)
I*T product
Time-domain waveform plots
Frequency-domain harmonic spectrum plots
Harmonic filter performance evaluation
Report voltage & current harmonic distortions
Report RMS, ASUM, TIF, & I*T values
Text output reports including harmonic violation flags
Graphical one-line display of harmonic results
Voltage & current harmonic spectrum plots
Export one-line diagrams to third party CAD systems
Fundamental load flow results
Use Crystal Reports® for full color, customizable reports
Export output reports to your favorite word processor
Multiple plot database comparison in single window using Plot Analyzer™ tool

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Videos

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Harmonic Mitigation Project in Steel Plant

This presentation aims to explain the necessary steps to comply with national grid code standards; an exemplary case of a steel manufacturing plant with intensive use of induction furnaces and a THD that exceeded the Grid Code's limits. This presentation highlights compliance, analysis, engineering (electrical power system studies), and equipment designed to comply with the technical criteria and mitigation. ETAP was used to size a filter to mitigate harmonics and improve the power factor for 34.5 kV transformers for grid code compliance.

Case Study

Play 17:10

How to perform Harmonic Analysis with ETAP

Learn how engineers use ETAP Harmonic Analysis software to simulate harmonic current and voltage sources, identify harmonic problems, reduce nuisance trips, design, and test filters, and report harmonic voltage and current distortion limit violations on balanced or unbalanced systems. Additionally, for transmission and distribution system operators, Harmonic Grid Code automates harmonic analysis for detailed power quality assessment reporting demonstrating the generation facility is designed to comply with applicable harmonic limits. Study reports include worst-case incremental and total harmonic distortion, frequency-dependent Thevenin Equivalent at PCC, and color-coded impedance loci charts.

Play 37:49

Power Quality - Fundamentals of Harmonics

This webinar presents the fundamentals of harmonics, harmonic distortion and its sources, and related issues such as premature equipment failure or unplanned downtime.
The presentation will demonstrate how to identify, analyze, and minimize or eliminate harmonics problems using the ETAP software.