The Camparison of Harmonic Distortion Self-Excited Induction Generator with Isolated Synchronous Generator under Non-linear Loads

2015 ◽  
Vol 6 (4) ◽  
pp. 759
Author(s):  
Refdinal Nazir ◽  
Krismadinata Krismadinata ◽  
Rizka Amalia
Keyword(s):  
Harmonic Distortion ◽  
Synchronous Generator ◽  
Induction Generator ◽  
Diagram Method ◽  
Current Harmonics ◽  
Linear Load ◽  
Laboratory Test Results ◽  
Non Linear ◽  
Harmonic Components ◽  
Non Linear Load

In this paper, the harmonic distortion for Self-Excited Induction Generator (SEIG) and an isolated synchronous generator (ISG) under non-linear load during steady state conditions are analyzed. The voltage and current harmonics distortion for both generators are calculated using the transfer function method in frequency domain for SEIG and phasor diagram method for ISG. This analysis is done independently one by one component for all harmonic components appear. The analysis results for both generators are verified to the laboratory test results. For loading with the same non-linear load to both generators, the harmonics distortion on the stator windings of SEIG was smaller than compare ISG. In addition, the harmonic distortion effects on other loads connected to PCC point of SEIG was lower than the other loads connected to ISG.

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.

Harmonic Compensation using STATCOM for SEIG Feeding Single-Phase Load Connected between Different Phases

2017 ◽  
Vol 6 (3) ◽  
pp. 489
Author(s):  
Satyanarayan Gorantla ◽  
Goli Ravi Kumar
Keyword(s):  
Power System ◽  
Power Quality ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Induction Generator ◽  
Generator System ◽  
Synchronous Reference Frame ◽  
Linear Load ◽  
Non Linear ◽  
Non Linear Load

The paper presents the analysis of harmonic distortion when non-linear load is connected in different phases of power system with STATCOM for singly excited induction generator system with wind turbine as prime mover. Now-a-days due to the drastically increased in use of non linear loads causes many power quality problems in power system network. Those problems are classified as reactive power problems, harmonics, voltage sags and swells. Out of these problems harmonic problems are major concern. Custom power devices proposed for mitigation of power quality in network. For compensation of harmonic, static compensator (STATCOM) is used. The paper presents the compensation of harmonic power quality issues using STATCOM for the system with singly-excited induction generator feeding non-linear load connected in different phases. STATCOM is controlled using synchronous reference frame theory to produce pulses to switches of STATCOM sensing the input parameters. Proposed concept was developed using MATLAB/SIMULINK software and results are presented for non-linear load connected in different phases of the power system. THD analysis was shown for source current and load current for different cases.

scholarly journals ANALISIS KUALITAS DAYA PADA SUPLAI DAYA LISTRIK PT. SOSRO

2020 ◽  
Vol 1 (1) ◽  
pp. 27-33
Author(s):  
Aceng Daud Energi
Keyword(s):  
Power Systems ◽  
Harmonic Distortion ◽  
Data Logger ◽  
Current Harmonics ◽  
Ac Power ◽  
Linear Load ◽  
Harmonic Components ◽  
Non Linear Load ◽  
Voltage Harmonics

In more than ten years, quality of electricity has growed from clearness to be an principal issue. One heavy problems from quality of power is harmonic distortion and its consequences. Particularly, the increasing of penetration of loads bases on power electronics (non-linear load) what creates a harmonic distortion in AC power systems. Then, quality of electricity becomes principal issue for utility and its consumer and both swiftly adopts philosophy and proposes limits in new international standard (IEC, EN, BS, IEEE). As consequence the equipments of power conditioning (converter) will become more important for electrical utility and its consumer. From the results with the data logger recording at PT SOSRO distribution feeder system found that there are several current and voltage harmonics are significant in the load and hence the supply side. Fifth and the seventh Harmonic are heaviest harmonic components in the current load. Installation of passive filters will be one solution to overcome the issue with the current harmonics. The recomendation proposed will be submitted to management for consideration PT SOSRO factory in determining which type of passive filter will be used.

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 Advanced power transformer with improved parameters for rural electrical networks

2021 ◽  
Vol 59 (3) ◽  
pp. 366-377
Author(s):  
M. A. Prishchepov ◽  
A. I. Zelenkevich ◽  
V. M. Zbrodyga
Keyword(s):  
Power Supply System ◽  
Single Phase ◽  
Power Transformer ◽  
Electrical Equipment ◽  
Electrical Networks ◽  
Power Losses ◽  
Linear Load ◽  
Non Linear ◽  
Harmonic Components ◽  
Non Linear Load

The problem of power quality supply is relevant for rural electrical networks, due to long distance and branching, as well as connection of a large number of single-phase and non-linear loads. Asymmetry of electrical loads causes voltage asymmetry, which adversely affects the operation of all elements of the electrical system, causing additional power losses, reducing the service life of electrical equipment and its economic performance, as well as reliability of operation of individual electrical equipment and power supply system as a whole. Reduction of voltage asymmetry can be ensured by rational construction of electrical network circuit and use of special correcting devices. The authors consider it reasonable to use relatively simple and reliable by design and inexpensive power transformers with a “star - double zigzag with a zero wire” (Y/2Zн) winding connection circuit with a neutral winding connection group. The paper deals with design and processes of converting electrical energy in a transformer. It has been proved that phase EMF of the secondary winding coincides in phase with the same EMF of the primary winding, i.e. the proposed circuit has a neutral windings’ connection group. Results of theoretical studies of transformer operation with an asymmetric and non-linear load are presented. Decrease in voltage asymmetry is due to the neutral sequence components compensation. Decrease of the higher harmonic voltage components level occurs due to the compensation of the higher harmonics multiplied three times. It is theoretically substantiated that transformer will not emit higher harmonic components of zero sequence voltages into the supply network. Experimental studies have confirmed the theoretical conclusions that a transformer with Y/2Zн winding connection circuit allows obtaining the highest level of voltage symmetry with an asymmetric load. In single-phase load mode, the values of voltage unbalance factor in reverse sequence do not exceed 1.7 %, in neutral sequence - 2.9 %. The transformer allows obtaining 1.2-1.5 times lower value of total harmonic components factor at non-linear load, which is the best result among circuits studied. This power transformer is resistant to load effects that distort voltage quality and is capable to provide a high level of symmetry and sinusoidal voltage as well as parallel operation with commercially available transformers. This makes it possible to use it in rural electrical networks to reduce power losses, increase service life and efficiency of electrical equipment, and increase reliability of the power supply system.

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 Analysis and modeling of harmonic distortions in consumer’s distribution networks, containing a powerful non-linear load

2018 ◽  
Vol 58 ◽  
pp. 03015
Author(s):  
N.R. Rakhmanov ◽  
V.G. Kurbatsky ◽  
H.B. Guliyev ◽  
N.V. Tomin ◽  
R.N. Rakhmanov
Keyword(s):  
Power Transmission ◽  
Distribution Networks ◽  
Load Flow ◽  
Nonlinear Load ◽  
Linear Load ◽  
Non Linear ◽  
Random Variability ◽  
Harmonic Components ◽  
Non Linear Load ◽  
Power Harmonics

The paper proposes to simulate a random variability of the nonlinear load in the form of probabilistic characteristics of the amplitudes of harmonic components of powers. The influence of the variability of distribution of amplitude values of the power harmonics on the load flow in the network, power losses and maximum power transmission in lines is studied. The results of design experiments for one of distribution networks of Azerbaijan power system, feeding the non-linear load, are given.

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