Harmonic Source Identification System

Muhammad Sufyan Safwan, Mohamad Basir (2015) Harmonic Source Identification System. Project Report. UTeM, Melaka, Malaysia. (Submitted)

Text (24 Pages) Harmonic Source Identification System 24 Pages.pdf Download (429kB)

Abstract

The impact of harmonic distortion in modern power system became a great concern in the last decade. The problem associated with the increase usage of appliances for non-linear load allows harmonic to presence in electric power system. Harmonic distortion is not only lead to poor power quality but also can cause malfunction to sensitive electronic equipments. In order to reduce the amount of harmonic, identifying the harmonic source location between utilities and customer is an effective way for harmonic signature recognition. To evaluate the quality of the source, measurement for the single phase 240VAC source should be proposed with the capability to identify the harmonic source. Harmonic Source Identification System (HSIS) is developed to analyze the harmonic source by identifying the total harmonic distortion for voltage and current used by using both direction of active power flow and Fast Fourier Transform (FFT) method. Different load identification due to different level of harmonic distortion can be classified by conditions includes ‘Excellent’, ‘Caution’ or ‘Danger’ that recommended by IEEE 519-2014. The signal measured by voltage and current transducers will be converted in the form of digital signals for signal processing by using NI 6000 DAQ card. The effectiveness of HSIS is emphasized through simulation results from MATLAB. A performance test is conducted with different type of loads namely incandescent lamp, CFL lamp and synchronous motor. The notch area that occurs at the distorted waveform is presented by power spectrum. Waveform measured is identified to be less distorted for non-power electronic components and is fully distorted for power electronic components through performance test. The expected value for total harmonic distortion for voltage (THDv) and current (THDi) will be shown on monitors and users can identify the performance of the system through HSIS and safety precaution can be made if the value of harmonic exceed dangerous level.

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