Analisa Deret Fourier Harmonisa yang Dihasilkan Komputer dan Laptop Menggunakan Simulasi Matlab/Simulink

Frensius, Frensius (2023) Analisa Deret Fourier Harmonisa yang Dihasilkan Komputer dan Laptop Menggunakan Simulasi Matlab/Simulink. S1 thesis, Universitas Kristen Indonesia.

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Abstract

Harmonisa adalah kelipatan dari frekuensi dasar (50 Hz) dalam sistem energi listrik, yang diakibatkan karena peningkatan penggunaan beban nonlinier di industri, perkantoran, pendidikan dan rumah tangga, sehingga mengakibatkan peningkatan distorsi harmonisa pada jaringan distribusi. Komputer dan laptop adalah beban nonlinier yang merupakan sumber harmonisa arus dalam sistem kelistrikan serta banyak digunakan oleh masyarakat. Tingginya harmonisa dapat merusak peralatan listrik. Penelitian ini membahas masalah harmonisa yang ditimbulkan oleh komputer dan laptop yang berbeda merek, agar diketahui nilai THDv, THDi, THDi orde dominan, persamaan gelombang harmonisa arus dan bentuk gelombang arus. Untuk melakukan penelitian ini, data pengukuran PQA Kyoritsu KEW 6315 di analisa menggunakan metode deret Fourier dan selanjutnya dilakukan simulasi FFT Matlab Simulink. Hasil penelitian ini memperlihatkan nilai THDv pada komputer dan laptop yang berbeda merek, secara keseluruhan memenuhi standar IEEE 519-2014, sementara nilai THDi berkisar antara 80% hingga 86,96% yang tidak memenuhi standar IEEE 519-2014. Orde arus harmonisa dominan yang ditimbulkan oleh komputer dan laptop berbeda merek memiliki pola kecenderungan yang sama pada orde arus harmonisa dominan yang terjadi pada orde ke-3, 5, 7 dan 9, dimana orde ke-3 memiliki nilai THDi dominan tertinggi dengan rentang nilai diantara 40% hingga 52,17%. Juga diperoleh persamaan gelombang arus harmonisa yang dihasilkan oleh komputer dan laptop menggunakan deret Fourier berdasarkan orde arus harmonisa dominan yang sama dari hasil pengukuran yaitu pada orde ke-1, ke-3, ke-5, ke-7, dan ke-9. Kata kunci: THD, deret Fourier, Komputer dan Laptop, FFT Simulink. / Harmonics are multiples of the base frequency (50 Hz) in electrical energy systems, resulting from increased use of nonlinear loads in industry, offices, education and households, resulting in increased harmonic distortion in distribution networks. Computers and laptops are nonlinear loads that are a source of harmonic currents in electrical systems and are widely used by the public. High harmonics can damage electrical equipment. This study discusses harmonic problems caused by computers and laptops of different brands, in order to know the values of THDv, THDi, dominant order THDi, current harmonic wave equations and current waveforms. To conduct this study, PQA Kyoritsu KEW 6315 measurement data was analyzed using the Fourier series method and then a simulation of FFT Matlab Simulink was carried out. The results of this study show that the THDv values on computers and laptops of different brands, as a whole meet the IEEE 519-2014 standard, while the THDi values range from 80% to 86.96% which do not meet the IEEE 519-2014 standard. The dominant harmonic current order generated by computers and laptops of different brands has the same trend pattern in the dominant harmonic current order that occurs in the 3rd, 5th, 7th and 9th order, where the 3rd order has the highest dominant THDi value with a range of values between 40% to 52.17%. Also obtained is the wave equation of harmonic currents generated by computers and laptops using the Fourier series based on the same order of dominant harmonic currents from the measurement results, namely in the 1st, 3rd, 5th, 7th, and 9th order. Keywords: THD, Fourier series, Computer and Laptop, FFT Simulink

Item Type: Thesis (S1)
Contributors:
ContributionContributorsNIDN/NIDKEmail
Thesis advisorPurba, RobinsonNIDN0307015102roben.purba@yahoo.co.id
Thesis advisorSilalahi, Eva MagdalenaNIDN0328087408eva.silalahi@uki.ac.id
Additional Information: Nomor Panggil : T.A 621.804 Fre a 2023
Subjects: TECHNOLOGY > Electrical engineering. Electronics. Nuclear engineering > Applications of electric power
TECHNOLOGY > Electrical engineering. Electronics. Nuclear engineering > Electric apparatus and material s. Electric circuits. Electric networks
TECHNOLOGY > Electrical engineering. Electronics. Nuclear engineering > Electronics
Divisions: FAKULTAS TEKNIK > Teknik Elektro
Depositing User: Users 3436 not found.
Date Deposited: 25 Aug 2023 08:42
Last Modified: 11 Dec 2023 03:50
URI: http://repository.uki.ac.id/id/eprint/12143

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