TIME-HARMONIC ANALYSIS IN ELECTRIC POWER SYSTEMS

Öz

In this study, for time-varying signals in electric power systems, a multi functional system structure involving fundamental frequency detection, phase angle and amplitude estimation of harmonic and interharmonic components have been developed. Due to its simple and open structure, this system provides knowledge of harmonic component values as well as information about at which intervals and to what extend these component values are effective, which is possible with interventions that improve performance.The results of the experimental studies performed by using MATLAB simulation environment show that, this system is convenient and effective for the harmonic analysis of the current and voltage waveforms. Therewith, the individual effects of this time-variant harmonic and interharmonic components could be instantly detected in 3D time-harmonic space. 

Anahtar Kelimeler

• Real time harmonic detection in power systems
• time-varying harmonic and interharmonics
• fundamental frequency estimation
• time-harmonic analysis

ELEKTRİK GÜÇ SİSTEMLERİNDE ZAMAN-HARMONİK ANALİZİ

Öz

Bu çalışmada, elektrik güç sistemlerinde zamanla değişen sinyaller için temel frekans tespiti ile harmonik ve ara-harmonik bileşenlerin genlik ve faz açılarının kestirimini kapsayan çok işlevli bir sistem yapısı geliştirilmiştir. Gerçekleştirilen bu sistem, basit ve açık yapısından dolayı başarımı arttıracak müdahalelerle harmonik bileşenlerinin yanı sıra, bu bileşenlerin hangi zaman aralığında ve ne oranda etkin oldukları bilgisini sunmaktadır. MATLAB programı ile benzetim ortamında yapılan çalışmalar, sistemin, akım ve gerilim dalga şekillerinin harmonik analizinde kullanışlı, etkin sonuçlar verdiğini göstermektedir. Bununla, zamanla değişen harmonik ve ara-harmoniklerin bireysel etkileri, zaman-harmonik uzayında gerçek zamanlı ve 3 boyutlu olarak tespit edilebilecektir.

Anahtar Kelimeler

• Güç sistemlerinde gerçek zamanlı harmonik tespiti
• temel frekans kestirimi
• zamanla değişen harmonik ve ara harmonikler
• zaman-harmonik analizi

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