Fast 10-Point DFT Algorithm for Power System Harmonic Analysis

This article presents an efficient algorithm for computing a 10-point DFT. The proposed algorithm reduces the number of multiplications at the cost of a slight increase in the number of additions in comparison with the known algorithms. Using a 10-point DFT for harmonic power system analysis can improve accuracy and reduce errors caused by spectral leakage. This paper compares the computational complexity for an L×10M-point DFT with a 2M-point DFT.

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Power System Analysis of Seawater Desalination Plant in Algeria with Different Load Scenarios

Journal Européen des Systèmes Automatisés ◽

10.18280/jesa.540305 ◽

2021 ◽

Vol 54 (3) ◽

pp. 423-434

Author(s):

Amine Zeggai ◽

Farid Benhamida ◽

Riyadh Bouddou

Keyword(s):

Power System ◽

Reverse Osmosis ◽

Power Flow ◽

System Analysis ◽

Short Circuit ◽

Seawater Desalination ◽

Power System Analysis ◽

Full Load ◽

The Cost ◽

Short Circuit Analysis

The cost of electricity for the reverse osmosis desalination process is up to 50% of the cost per cubic meter of water produce. Currently, the reduction of energy consumption is the main objective of the research on reverse osmosis plants. This document presents a power system analysis of the seawater desalination plant in Algeria with different load scenarios with a power of 50 MW made available by the electricity company Sonelgaz and a distribution level of 220/11/0.69/0.4 kV and a 2 MW diesel generator at the 0.4 kV level. The objective of this study is to analyze and dimension a general distribution network of an industrial customer through the power flow with different load and contingency scenarios (full load, full load N-1, low load, emergency system) to know and control its optimal and flexible operation. In a second step, the dimensioning of different protective devices is planned through a short circuit analysis of this network in order to evaluate the performance of the system. The ETAP program is used to carry out our simulation of this industrial plant and the effectiveness of the results is proven by comparisons with real measurements for the power flow analysis on the one hand and on the other hand with the results obtained by the builder for the short circuit analysis.

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10-Point DFT and its Application in Power System Harmonic Analysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.433-440.7458 ◽

2012 ◽

Vol 433-440 ◽

pp. 7458-7464

Author(s):

Dao Lin Li ◽

Hai Jun Li

Keyword(s):

Power Systems ◽

Power System ◽

Harmonic Analysis ◽

Efficient Algorithm ◽

Barrier Effect ◽

Spectral Leakage ◽

Simulation Results

In this paper, an efficient algorithm for computing 10-point DFT, radix-10 FFT algorithm for computing10 Superscript textMSubscript text-point DFT and N=L×10 Superscript textMSubscript text-point DFT are presented. FFT is often employed in power systems harmonics analysis even though it is not accurate due to spectral leakage and barrier effect. When N=L×10Superscript textMSubscript text-point DFTs are used to analyze harmonics in power systems, comparing to N=2 Superscript textMSubscript text-point DFTs, very accurate harmonic parameters can be obtained. The simulation results in MATLAB show that the methods are feasible and effective to enhance analysis accuracy.

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The Effects of Harmonics Generated by Industrial Loads in the Power System

Materials Science Forum ◽

10.4028/www.scientific.net/msf.856.343 ◽

2016 ◽

Vol 856 ◽

pp. 343-348

Author(s):

Vezir Rexhepi

Keyword(s):

Power Systems ◽

Power System ◽

Harmonic Analysis ◽

System Analysis ◽

Electronic Devices ◽

Current Waveform ◽

Nonlinear Loads ◽

System Analysis And Design ◽

Analysis And Design ◽

Power System Analysis

Harmonic analysis studies have become an important component of power system analysis and design on recent years. They are used to quantify the distortion in voltage and current waveform and avoid them to propagate through the AC network. Harmonics are created mainly by nonlinear loads in power systems. Thus, in this paper are analyzed the harmonics created by industrial loads and other electronic devices and their effects.

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