Current and Voltage Harmonic Distortion Minimization in Nonlinear Loads

2020 ◽  
Author(s):  
Langlang Gumilar ◽  
Arya Kusumawardana ◽  
Muhammad Afnan Habibi ◽  
Soraya Norma Mustika ◽  
Wahyu Sapto Nugroho
Keyword(s):  
Harmonic Distortion ◽  
Nonlinear Loads ◽  
Distortion Minimization

scholarly journals Dual Two-Level Voltage Source Inverter Virtual Inertia Emulation: A Comparative Study

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1160
Author(s):  
Mohammad Ali Dashtaki ◽  
Hamed Nafisi ◽  
Amir Khorsandi ◽  
Mojgan Hojabri ◽  
Edris Pouresmaeil
Keyword(s):  
Harmonic Distortion ◽  
Synchronous Generator ◽  
Voltage Source ◽  
Small Signal ◽  
Voltage Source Inverter ◽  
Nonlinear Loads ◽  
Virtual Inertia ◽  
The Stability ◽  
Stability Enhancement ◽  
Oscillation Damping

In this paper, the virtual synchronous generator (VSG) concept is utilized in the controller of the grid-connected dual two-level voltage source inverter (DTL VSI). First, the topology of the VSG and the DTL VSI are presented. Then, the state-space equations of the DTL VSI and the grid-connected two-level voltage source inverter (TL VSI), regarding the presence of the phase-locked loop (PLL) and the VSG, are given. Next, the small-signal modeling of the DTL VSI and the TL VSI is realized. Eventually, the stability enhancement in the DTL VSI compared with the TL VSI is demonstrated. In the TL VSI, large values of virtual inertia could result in oscillations in the power system. However, the ability of the DTL VSI in damping oscillations is deduced. Furthermore, in the presence of nonlinear loads, the potentiality of the DTL VSI in reducing grid current Total Harmonic Distortion (THD) is evaluated. Finally, by using a proper reference current command signal, the abilities of the DTL VSI and the TL VSI in supplying nonlinear loads and providing virtual inertia are assessed simultaneously. The simulation results prove the advantages of the DTL VSI compared with the TL VSI in virtual inertia emulation and oscillation damping, which are realized by small-signal analysis.

Harmonic distortion monitoring for nonlinear loads using neural-network-method

2013 ◽  
Vol 13 (1) ◽  
pp. 475-482 ◽  
Author(s):  
Claudionor Francisco Nascimento ◽  
Azauri Albano Oliveira ◽  
Alessandro Goedtel ◽  
Alvaro Batista Dietrich
Keyword(s):  
Neural Network ◽  
Harmonic Distortion ◽  
Nonlinear Loads ◽  
Neural Network Method ◽  
Network Method

scholarly journals Improved Backstepping Control of a DFIG based Wind Energy Conversion System using Ant Lion Optimizer Algorithm

2021 ◽  
Author(s):  
Zoubir Zeghdi ◽  
Linda Barazane ◽  
Youcef Bekakra ◽  
Abdelkader Larabi
Keyword(s):  
Fitness Function ◽  
Harmonic Distortion ◽  
Absolute Error ◽  
Optimization Method ◽  
Backstepping Control ◽  
Ant Lion Optimizer ◽  
Integral Time ◽  
Distortion Minimization ◽  
Ant Lion ◽  
Doubly Fed

In this paper, an improved Backstepping control based on a recent optimization method called Ant Lion Optimizer (ALO) algorithm for a Doubly Fed Induction Generator (DFIG) driven by a wind turbine is designed and presented. ALO algorithm is applied for obtaining optimum Backstepping control (BCS) parameters that are able to make the drive more robust with a faster dynamic response, higher accuracy and steady performance. The fitness function of the ALO algorithm to be minimized is designed using some indexes criterion like Integral Time Absolute Error (ITAE) and Integral Time Square Error (ITSE). Simulation tests are carried out in MATLAB/Simulink environment to validate the effectiveness of the proposed BCS-ALO and compared to the conventional BCS control. The results prove that the objectives of this paper were accomplished in terms of robustness, better dynamic efficiency, reduced harmonic distortion, minimization of stator powers ripples and performing well in solving the problem of uncertainty of the model parameter.

Optimal $C$-Type Passive Filter Based on Minimization of the Voltage Harmonic Distortion for Nonlinear Loads

2012 ◽  
Vol 59 (1) ◽  
pp. 281-289 ◽  
Author(s):  
Shady Hossam Eldeen Abdel Aleem ◽  
Ahmed Faheem Zobaa ◽  
Mohamed Mamdouh Abdel Aziz
Keyword(s):  
Harmonic Distortion ◽  
Nonlinear Loads ◽  
Passive Filter

scholarly journals Analisis Pengaruh Nilai Resistansi untuk Pentanahan Kawat Netral Terhadap THD Arus di Fakultas Teknik Universitas Udayana – Sudirman

2018 ◽  
Vol 5 (2) ◽  
pp. 167
Author(s):  
I G.N Nanda Ramdipa Amerta ◽  
I Wayan Rinas ◽  
I G.N Janardana
Keyword(s):  
System Modeling ◽  
Harmonic Distortion ◽  
Load Condition ◽  
Sine Wave ◽  
Harmonic Load ◽  
Electrical System ◽  
Nonlinear Loads ◽  
The Earth ◽  
Simulation Results ◽  
Resistance Value

Harmonics is a periodic sine wave distortion, due to the operation of nonlinear loads. Har-monics causes current to flow in the neutral wire even though in a balanced load condition, in addition to harmonic load imbalance problems will increase the current flowing in the neutral wire, making it dangerous for the electrical system. This research was using electrical system modeling simulation in MATLAB application by changing the earth resistance value to see the effect of earth resistance value to Total Harmonic Current Distortion (THDi), it is necessary to analyze the effect of resistance value for THDi neutral wire grounding. This study uses the Fast Fourier Transform (FFT) method. THDi simulation results when the conditions of the resistance value is 9 ?, THDi percentage in phase R is 6.30%, Phase S is 2.86%, Phase T is 2.50%. When the earth resistance value is 5 ?, the percentage of THDi decreases with the value in phase R is 6.09%, Fasa S is 2.61%, Fasa T is 2.48%. When the earth resistance value is 2 ?, the THDi percentage in the R phase is 5.85%, Fasa S is 2.09%, Fasa T is 2.22%. Based on the simulation results it is known that the smaller the earth resistance value, the smaller the harmonic distortion in the electrical system.

scholarly journals Harmonic interaction of a static Var compensator with AC power system containing multiple non-linear loads

2020 ◽  
Vol 40 (3) ◽  
pp. 21-31
Author(s):  
Mohamed Nassim Kraimia ◽  
Mohamed Boudour
Keyword(s):  
Power System ◽  
Power Flow ◽  
Fourier Transforms ◽  
Current Source ◽  
Harmonic Distortion ◽  
Static Var Compensator ◽  
Nonlinear Loads ◽  
Compensating Devices ◽  
Ac Transmission ◽  
The Impact

In this paper a study of the impact of the harmonics generated by a static Var compensator (SVC) is presented. The SVC is modeled, in the harmonic domain, as a coupled current source by using the complex Fourier transforms. Then, this model is converted to polar form to be integrated into the harmonic power flow program. This approach has been carried out on the IEEE 14 bus test power system, in order to show its effectiveness in evaluating the impact of harmonics, injected by the shunt compensating devices, and its interaction with the AC transmission system, in meshed power networks. Since the SVC consists of a thyristorcontrolled reactor (TCR) and a fixed capacitor, the harmonic currents are functions of the TCR thyristors firing angles. The variation of the total voltage harmonic distortion as function of firing angle changes and location of nonlinear loads is clearly presented and discussed.

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