scholarly journals MSVPWM Based-SAPF For Harmonic Mitigation in The Distribution Network Under Unbalanced Condition

2020 ◽  
Vol 5 (1) ◽  
pp. 149-163
Author(s):  
Haider Muhamad Husen ◽  
Salar Ahmed Qadir
Keyword(s):  
Power Systems ◽  
Pulse Width Modulation ◽  
Current Harmonics ◽  
Synchronous Reference Frame ◽  
Linear Load ◽  
Non Linear ◽  
Input Source ◽  
Source Current ◽  
Supply Voltages ◽  
Non Linear Load

Unbalanced input source voltages generate extra current harmonics in addition to non-linear loads which distorts the power quality in the entire power systems. Three-phase multi-level neutral point clamped (NPC) converter based shunt active harmonic filter (SAHF) are used as a solution to overcome problems due to current harmonics. In this work, synchronous reference frame (d-q) algorithm is selected to detect the harmonic current components, Proportional-integral (PI) controller is utilized to ameliorate the storage of energy in the dc-link capacitor and the multilevel space vector pulse width modulation (MSVPWM) strategy determines the switching pulses of NPC inverter. Under balanced input supply voltages condition, the proposed MSVPWM achieved a mitigation of source current THD of 3.58 % as compared to 28.57 % prior to compensation on non-linear load. Furthermore, the MSVPWM technique was compared with and without compensation under unbalanced input source voltages and the results shows that the proposed method achieved reduction in source current THD of 3.96 % as compared to 29.76 % after and before compensation respectively. The proposed MSVPWM based-SAPF model was also compared with conventional SVPWM under balanced and unbalanced input supply voltages conditions. The results show that MSVPWM performed better than CSVPWM. The simulated results obtained by MATLAB/SIMULINK power system environment. All the results for the presented work are within IEEE-519 harmonics standard with non-linear loads under balanced and unbalanced voltages condition. 

Harmonic Elimination Using STATCOM for SEIG Fed Induction Motor Load

2017 ◽  
Vol 8 (3) ◽  
pp. 1026
Author(s):  
Satyanarayana Gorantla ◽  
Goli Ravi Kumar
Keyword(s):  
Induction Motor ◽  
Distribution System ◽  
Load Current ◽  
Synchronous Reference Frame ◽  
Harmonic Elimination ◽  
Non Linear ◽  
Source Current ◽  
Motor Load ◽  
Non Linear Load ◽  
Induction Motor Load

Non-linear loads connected to distribution system induce harmonics in to source components and the presence of harmonics in source components affects the performance of other sensitive loads connected at the same point. Induction motor load for drive system should be operated with variable frequency and variable voltage for its speed control. To vary the voltage and frequency, induction motor is fed from an inverter. This total drive set-up constitutes non-linear load type and will be the source of harmonics. This paper depicts the suppression of harmonics with STATCOM in distribution system when induction motor load is fed from SEIG (singly excited inductin generator). STATCOM is controlled with simple synchronous reference frame theory and the results are shown for source current, load current. THD in source current and load current was also shown for the said system. System for single-phase and three-phase induction motor drive was developed and results are shown using MATLAB/SIMULINK software.

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.

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 Matlab/simulink simulation of unified power quality conditioner-battery energy storage system supplied by PV-wind hybrid using fuzzy logic controller

2019 ◽  
Vol 9 (3) ◽  
pp. 1479
Author(s):  
Amirullah Amirullah ◽  
Ontoseno Penangsang ◽  
Adi Soeprijanto
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Voltage Source ◽  
Battery Energy Storage ◽  
Linear Load ◽  
Non Linear ◽  
Source Current ◽  
Non Linear Load ◽  
Power Quality Conditioner ◽  
Battery Energy

This paper presents performance analysis of Unified Power Quality Conditioner-Battery Energy Storage (UPQC-BES) system supplied by Photovoltaic (PV)-Wind Hybrid connected to three phase three wire (3P3W) of 380 volt (L-L) and 50 hertz distribution system. The performance of supply system is compared with two renewable energy (RE) sources i.e. PV and Wind, respectively. Fuzzy Logic Controller (FLC) is implemented to maintain DC voltage across the capacitor under disturbance scenarios of source and load as well as to compare the results with Proportional Intergral (PI) controller. There are six scenarios of disturbance i.e. (1) non-linear load (NL), (2) unbalance and nonlinear load (Unba-NL), (3) distortion supply and non-linear load (Dis-NL), (4) sag and non-linear load (Sag-NL), (5) swell and non-linear load (Swell-NL), and (6) interruption and non-linear load (Inter-NL). In disturbance scenario 1 to 5, implementation of FLC on UPQC-BES system supplied by three RE sources is able to obtain average THD of load voltage/source current slightly better than PI. Furthermore under scenario 6, FLC applied on UPQC-BES system supplied by three RE sources gives significantly better result of average THD of load voltage/source current than PI. This research is simulated using Matlab/Simulink.

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.

scholarly journals Power Quality Improvement in Distribution System Using Parallel DSTATCOM

2018 ◽  
Vol 7 (4.24) ◽  
pp. 9
Author(s):  
Ahmed Mohammed Mohsin Alzubaidi ◽  
P. V. Ramana Rao
Keyword(s):  
Quality Improvement ◽  
Power Quality ◽  
Power Distribution ◽  
Distribution System ◽  
Power Distribution System ◽  
Synchronous Reference Frame ◽  
Linear Load ◽  
Non Linear ◽  
Power Quality Improvement ◽  
Non Linear Load

DSTATCOM is one among FACTS controllers to reduce harmonic effect in power system. Presence of non-linear loads induces harmonics to source components which in-turn affects other sensitive loads. Parallel custom devices share the compensating currents and as a result stress on individual custom device reduces. This paper presents power quality improvement using parallel DSTATCOM in power distribution system. The parallel DSTATCOM are controlled with a common single control scheme using synchronous reference frame theory. Proposed concept was implemented with MATLAB/SIMULINK software and results were discussed considering different loading conditions of the proposed system like balanced case non-linear load and unbalanced case non-linear load conditions.

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