Improved Control Strategy for Voltage and Current Compensator in a Grid-Connected Microgrid Without Dedicated Devices

2020 ◽  
Vol 17 (2) ◽  
pp. 1099-1105
Author(s):  
Attaullah Khidrani ◽  
M. H. Habibuddin ◽  
A. S. B. Mokhtar ◽  
A. H. Sule ◽  
A. Naderipur ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Control Strategy ◽  
Harmonic Distortion ◽  
Operating Conditions ◽  
Current Harmonic ◽  
Linear Load ◽  
Three Phase ◽  
Passive Filters ◽  
Combined Control ◽  
Non Linear Load

This paper proposes the combined control strategy to suppress the voltage and current harmonic contents in a three-phase hybrid fuel cell and wind turbine grid-connected inverters when subjected to non-linear load and unbalanced conditions. This innovative technique can effectively reduce the harmonic contents in the voltage and current of the studied system without any dependence on offset devices such as active and passive filters. The microgrid along with the proposed controlled strategy is modeled in Matlab/Simulink environment. In this research, it shows that the proposed control strategy not only reduces the total harmonic distortion (THD) to less than 5% (as compliance with IEEE 519 standard). It shows the superiority performance in the result as compared to existing techniques with the stabilization of unbalancing condition under different operating conditions with load changes and instant DG insertion.

scholarly journals HARMONISA LISTRIK GEDUNG PUSDIKLAT KETENAGALISTRIKAN ENERGI BARU TERBARUKAN DAN KONSERVASI ENERGI (KEBTKE) CIRACAS (SUATU STUDI PENELITIAN DI GEDUNG UTAMA PUSDIKLAT CIRACAS)

2020 ◽  
Vol 1 (2) ◽  
pp. 16-20
Author(s):  
Ady Wartono ◽  
Irzan Zakir ◽  
Massus Subekti
Keyword(s):  
Descriptive Analysis ◽  
Measurement Data ◽  
Harmonic Distortion ◽  
Total Harmonic Distortion ◽  
Current Harmonic ◽  
Voltage Distortion ◽  
Linear Load ◽  
Non Linear Load ◽  
The Moment ◽  
Electrical Installation

Abstract Harmonic distortion is a phenomenon arising due to the use of a non linear load on the power system. This phenomenon can cause problems on quality in terms of power will eventually cause various losses and even damage to several electrical appliances. The purpose of this research is to know the value of the harmonic distortion of current/Total Harmonic Distortion (THDi) and voltage/Total Harmonic Distortion (THDv) of electrical installation system Pusdiklat (KEBTKE) Ciracas using by Power Quality Analyzer and load mappings for each floor. This research was carried out at the main building of Pusdiklat KEBTKE on Jl. Poncol Raya No. 39, Ciracas, East Jakarta. Time research was done at 12:15 pm to 7:15 pm, from June 11 until June 15, 2016. The methods used in this research is descriptive analysis methods with quantitative approach, namely the research results which are then processed and analyzed to be taken to summarize. The content of the current harmonic distortion (THDi) on building Pusdiklat KEBTKE in general is above the permitted standard. Measurement data at 12:15 am – 7:15 pm who performed on June 10 to June 14, total harmonics distortion (THDI%) exceeded 15% except at certain times at the moment at least the use of other electronic or computers equipment in each floor of the building. The content of the current harmonic distortion (THDI) generally do not experience interference voltage harmonization. Based on measurement data at 12:15 am – 7:15 pm who performed on June 10 to June 14, total harmonic distortion of voltage distortion (THDV) does not exceed 5%.   Abstrak Harmonisa merupakan suatu fenomena yang timbul akibat adanya penggunaan beban non linier pada sistem tenaga listrik. Fenomena ini dapat menimbulkan masalah pada segi kualitas daya yang akhirnya akan menyebabkan berbagai kerugian dan bahkan kerusakan pada bebarapa peralatan listrik. Tujuan dari penelitian ini adalah untuk mengetahui nilai harmonisa arus/Total Harmonic Distortion (THDI) dan tegangan/Total Harmonic Distortion (THDV) sistem instalasi listrik ketenagalistrikan energi baru terbarukan dan konservasi energi (KEBTKE). Penelitian ini dilaksanakan pada gedung utama Pusdiklat ketenagalistrikan energi baru terbarukan dan konservasi energi (KEBTKE) Jl.Poncol Raya No.39,Ciracas, Jakarta Timur. Waktu penelitian dilakukan pada pukul 12:15 WIB hingga 19:15 WIB, dari tanggal 11 Juni sampai 15 Juni 2016. Metode yang digunakan dalam penelitian ini adalah metode deskriptif analisis dengan pendekatan kuantitatif. Kandungan harmonisa arus (THDI) pada gedung Pusdiklat ketenagalistrikan energi baru terbarukan dan konservasi energi (KEBTKE) secara umum berada di atas standar yang diiziinkan. Data pengukuran pukul 12:15 WIB – 19:15 WIB yang dilakukan pada tanggal 10 Juni 2016 hingga 14 Juni 2016 distorsi total harmonisa (%THDI) melebihi batas 15% Kecuali pada waktu- waktu tertentu pada saat sedikitnya penggunaan komputer atau peralatan elektronik lain di tiap lantai gedung tersebut. Kandungan harmonisa arus (THDI) secara umum tidak mengalami gangguan harmonisasi tegangan listrik. Berdasarkan data pengukuran pukul 12:15 WIB – 19:15 WIB yang dilakukan pada tanggal 10 Juni 2016 hingga 14 Juni 2016 distorsi total harmonisa tegangan (THDV) tidak melebihi batas 5% .

Performance Analysis of DVR Using ANN Controller for Voltage Quality Enhancement

2014 ◽  
Vol 573 ◽  
pp. 356-361 ◽  
Author(s):  
P. Sathish Babu ◽  
N. Kamaraj
Keyword(s):  
Harmonic Distortion ◽  
Voltage Sag ◽  
Simulation Studies ◽  
Dynamic Voltage Restorer ◽  
Voltage Quality ◽  
Linear Load ◽  
Voltage Restorer ◽  
Three Phase ◽  
Dynamic Voltage ◽  
Non Linear Load

This paper presents a Dynamic Voltage Restorer to mitigate power quality disturbances such as voltage sag, swell and harmonics. The compensation strategy is based on pre-sag compensation. Controller based on dq0 transformation technique and ANN is implemented in order to maintain the nominal load voltage and phase angle. Simulation studies under three phase rectifier with parallel resistive/capacitive dc load as a non linear load is carried out. Also the system is investigated under voltage sag and swells on source side using programmable AC source. Simulation results show that DVR performs accurately in mitigating disturbances with minimum Total Harmonic Distortion. The performance of DVR is verified using Matlab / Simulink Environment.

Experimental verification of DSTATCOM for various non-linear load

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Pushpanjali Shadangi ◽  
Sushree Diptimayee Swain ◽  
Pravat Kumar Ray ◽  
Gayadhar Panda
Keyword(s):  
Fuzzy Logic Controller ◽  
Harmonic Distortion ◽  
Pattern Generation ◽  
Total Harmonic Distortion ◽  
Synchronous Reference Frame ◽  
Linear Load ◽  
Hysteresis Controller ◽  
Frame Method ◽  
Non Linear Load ◽  
Static Compensator

Abstract This paper elaborates a hybrid synchronous reference frame method has been proposed for the distribution static compensator (DSTATCOM) to enhance the compensation performance. This controller is designed in such a way that it generate the reference with respect to the change in load to reject the harmonics. Furthermore, a hysteresis controller is employed for switching pattern generation. Fuzzy logic controller is also implemented in MATLAB/simulink environment here to analyze the total harmonic distortion. Experimental analysis of the DSTATCOM demonstrates the potency and reliability of proposed controller over existing control strategy in the from of total harmonic distortion.

The Effects of Total Harmonics Distortion for Power Factor Correction at Non-Linear Load

2016 ◽  
Vol 7 (2) ◽  
pp. 551 ◽  
Author(s):  
R. A. Rani ◽  
Shakir Saat ◽  
Yusmarnita Yusop ◽  
Huzaimah Husin ◽  
F. K. Abdul Rahman ◽  
...  
Keyword(s):  
Power Factor ◽  
Single Phase ◽  
Power Factor Correction ◽  
Harmonic Distortion ◽  
The Other ◽  
Linear Load ◽  
Non Linear ◽  
Sinusoidal Waveform ◽  
Non Linear Load ◽  
The Relationship

This paper presents the effect of total harmonic distortion (THD) in power factor correction (PFC) at non-linear load. This study focuses on the relationship between THD and PFC. This is beacuse,the power factor affects THD. This occurs in power system as we have variety of loads, i. e linear load or non-linear load. The variety of loads will influence the sinusoidal waveform, which comes out from harmonic distortion. Thus, based on this study, we can compare the effective method in improving the power factor as it will not disturb the performance of THD. The focus of study is on the single phase load, where the voltage restriction is 240 V.  The analysis will  only focus on the consumer, which depends on the variety of non-linear load. Besides, the parameters for analysis are based on the percentage of THD and the value of power factor. The instrument for measuring the parameter is based on power factor correction device or technique. On the other hand, the method that was used for this study is based on simulation which incorporated the Multisim software. At the end of ths study, we can choose the most effective method that can be used to improve the power factor correction without disturbing the THD.

scholarly journals Voltage harmonic distortion compensation with non-linear load power sharing in low-voltage islanded microgrid

2019 ◽  
Vol 158 ◽  
pp. 32-48 ◽  
Author(s):  
Hassan Moussa ◽  
Jean-Philippe Martin ◽  
Serge Pierfederici ◽  
Farid Meibody-Tabar ◽  
Nazih Moubayed
Keyword(s):  
Low Voltage ◽  
Harmonic Distortion ◽  
Power Sharing ◽  
Distortion Compensation ◽  
Load Power ◽  
Linear Load ◽  
Non Linear ◽  
Islanded Microgrid ◽  
Non Linear Load

scholarly journals Reconditioning in synchronous operation with one parallel induction generator

2016 ◽  
Vol 1 (4) ◽  
pp. 66 ◽  
Author(s):  
Alana Da Silva Magalhães ◽  
Pedro Henrique Franco Moraes ◽  
Alan Henrique Ferreira Silva ◽  
Pedro Henrique Garcia Gomes ◽  
Aylton José Alves ◽  
...  
Keyword(s):  
Synchronous Generator ◽  
Active Power ◽  
Induction Generator ◽  
Voltage Profile ◽  
Current Harmonic ◽  
Harmonic Currents ◽  
Linear Load ◽  
Synchronous Operation ◽  
Harmonic Components ◽  
Non Linear Load

The purpose of this paper is to compare mathematical modeling and practical bench in order to validate the electrical interactions between an induction generator and a synchronous generator. Two generators was connected to a common bus in steady state, subject to non-linear load. The results comparing modeling and bench tests show that the induction generator besides the active power increasing, has a better way for harmonic currents flowing in common bus. It was concluded that the induction generator repowering and attenuates current harmonic components present at the connection point, improving the network voltage profile.

scholarly journals Design and Control of 3-phase, 4-wire, 4-Leg VSC Based DSTATCOM using Synchronous Reference Frame Theory

2019 ◽  
pp. 76-81
Author(s):  
Digambar Singh
Keyword(s):  
Reference Frame ◽  
Control Algorithm ◽  
Synchronous Reference Frame ◽  
Voltage Controller ◽  
Linear Load ◽  
Three Phase ◽  
Unbalanced Load ◽  
Non Linear Load ◽  
And Control ◽  
Load Simulation

This paper presents three-phase, four-leg, VSI based AC shunt D-STATCOM feeding AC voltage controller having resistive-inductive (RL) load for reducing the harmonic current and to maintain UPF using Synchronous Reference Frame (SRF) based control algorithm. This theory is employed to calculate compensating current while the three phase source is feeding a non-linear load. Simulation is performed for an unbalanced load in PFC mode in MATLAB environment using sim-power system (SPS) toolbox.

scholarly journals Nonlinear Robust Backstepping Control for Three-Phase Grid-Connected PV Systems

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Mohamed Habib Boujmil ◽  
Afef Badis ◽  
Mohamed Nejib Mansouri
Keyword(s):  
Control Strategy ◽  
Control Structure ◽  
Control Process ◽  
Backstepping Control ◽  
Operating Conditions ◽  
Cascade Control ◽  
Control Technique ◽  
Pv System ◽  
Pv Systems ◽  
Three Phase

This paper proposes a cascade control structure for three-phase grid-connected Photovoltaic (PV) systems. The PV system consists of a PV Generator, DC/DC converter, a DC link, a DC/AC fully controlled inverter, and the main grid. For the control process, a new control strategy using nonlinear Backstepping technique is developed. This strategy comprises three targets, namely, DC/DC converter control; tight control of the DC link voltage; and delivering the desired output power to the active grid with unity power factor (PF). Moreover, the control process relies mainly on the formulation of stability based on Lyapunov functions. Maximizing the energy reproduced from a solar power generation system is investigated as well by using the Perturb and Observe (P&O) algorithm. The Energetic Macroscopic Representation (EMR) and its reverse Maximum Control Structure (MCS) are used to provide, respectively, an instantaneous average model and a cascade control structure. The robust proposed control strategy adapts well to the cascade control technique. Simulations have been conducted using Matlab/Simulink software in order to illustrate the validity and robustness of the proposed technique under different operating conditions, namely, abrupt changing weather condition, sudden parametric variations, and voltage dips, and when facing measurement uncertainties. The problem of controlling the grid-connected PV system is addressed and dealt by using the nonlinear Backstepping control.

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