Simulation of effect of voltage sag on inrush current using MATLAB-SIMULINK for educational purpose

In this paper, latest technology is introduced in substitution to conventional voltage and current type inverter with Transformer based impedance (Z) source inverter in voltage sag assessment and mitigation and compared with voltage source inverter based dynamic voltage restorer. Transformer based impedance source inverters (Trans-Z source inverters) are newly proposed inverters that can be used to overcome downside of voltage source inverter, current source inverter and impedance source (Z-source) inverter. T-Z source inverter consists of transformer with high frequency and low leakage inductance along with low reactive component compared with conventional Z source inverter. In case of T-Z source inverter, voltage stress throughout Z-source capacitor is reduced along with inrush current limitation at startup. This paper presents modeling of T-Z source inverter based dynamic voltage restorer using MATLAB/SIMULINK software along with its THD analysis which is compared with VSI based dynamic voltage restorer. Here abc to dq0 control algorithm is employed. The control technique which is employed for simulation shows excellent results for voltage sag and swell compensation.

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Power Quality Improvement using D-STATCOM with Instantaneous Symmetrical Component Theory

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.c6410.049420 ◽

2020 ◽

Vol 9 (4) ◽

pp. 1263-1266

Keyword(s):

Quality Improvement ◽

Power Quality ◽

Control Technique ◽

Voltage Sag ◽

Matlab Simulink ◽

Voltage Dip ◽

Component Theory ◽

Symmetrical Component ◽

Power Quality Improvement ◽

Static Compensator

A technique is introduced to improve the voltage sag under sudden changes in load. The proposed technique is implemented by D-STATCOM (Distribution static compensator) and it is controlled by ISCT (Instantaneous Symmetrical Component Theory). Due to sudden changes in load, the voltage dip occurs at the time of switching of loads. At this time, the control technique generates reference currents and hysteresis block compares these currents with the reference currents and generates the pulses to D-STATCOM. Implementation of system along with compensation is carried out in MATLAB/SIMULINK

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Transformer Inrush Current Mitigation for Series Voltage Sag Compensator

International Journal of Engineering Trends and Technology ◽

10.14445/22315381/ijett-v48p234 ◽

2017 ◽

Vol 48 (4) ◽

pp. 187-192

Author(s):

Anil Kumar Pathak ◽

◽

A.K Jhala ◽

Pramod Kumar Rathore

Keyword(s):

Voltage Sag ◽

Inrush Current

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Power Quality Enhancement in Microgrid

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.573.668 ◽

2014 ◽

Vol 573 ◽

pp. 668-672

Author(s):

Tatipamula Mohana ◽

Nallaperumal Chellammal ◽

Smrithi Vijayan

Keyword(s):

Power Quality ◽

Boost Converter ◽

Multilevel Inverter ◽

Voltage Sag ◽

Quality Enhancement ◽

Matlab Simulink ◽

Pv Array ◽

Hybrid Combination ◽

Power Quality Conditioner ◽

Cascaded Multilevel Inverter

This paper deals with the mitigation of voltage sag and harmonic profile improvement in a microgrid system. The microgrid system contains a hybrid combination of PV array, Battery interfaced with a cascaded multilevel inverter through a boost converter. The microgrid feeds a non-linear balanced load. The occurrence of voltage sag in the microgrid is compensated using the reference current for mitigation by using the SRF theory. The proposed power quality conditioner can compensate the voltage variations and harmonic profile distortions caused by the load changes. The efficacy of the proposed power quality conditioner in the microgrid system is validated through the MATLAB/Simulink.

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SIMULASI GANGGUAN VOLTAGE SAG DAN VOLTAGE SWELL PADA JARINGAN 20 KV MENGGUNAKAN MATLAB SIMULINK

JURNAL QUA TEKNIKA ◽

10.30957/quateknika.v8i2.472 ◽

2018 ◽

Vol 8 (2) ◽

pp. 1-15

Author(s):

Mustofa Ihwanudin

Keyword(s):

Voltage Sag ◽

Matlab Simulink ◽

Voltage Swell

Pada jaringan distribusi sering muncul gangguan yang bisa mengakibatkan penurunan kualitas daya, diatara penyebab penurunan kualitas daya adalah voltage sag dan voltage swell. Gangguan jenis ini dapat mengakibatkan gagal operasi peralatan terutama yang menggunakan komponen elektronik daya. Penelitian berupa simulasi untuk menggambarkan terjadinya voltage sag dan voltage swell yang disebabkan gangguan fasa ke tanah dan pelepasan beban yang di variasi dengan sambungan trafo distribusi yang berbeda. Simulasi dilakukan menggunakan software matlab simulink. Hasilnya model simulasi mampu menggambarkan sinyal voltage sag akibat hubung singkat satu fasa, dua fasa, tiga fasa ke tanah dan sinyal voltage swell akibat pelepasan beban.

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Research on the Influence of Closing Resistor inside Circuit Breaker on Magnetizing Inrush Current of UHV Transformer

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.986-987.2001 ◽

2014 ◽

Vol 986-987 ◽

pp. 2001-2005

Author(s):

Zhen Guo ◽

Hui Yuan Zhang ◽

Bo Wang ◽

Ren Min Gong ◽

Yong Hao Zhang

Keyword(s):

Simulation Model ◽

Simulation Analysis ◽

Circuit Breaker ◽

Inrush Current ◽

Differential Protection ◽

Matlab Simulink ◽

Magnetizing Inrush Current ◽

The Impact

Using Matlab/Simulink software established the simulation model of UHV transformer and UHV power grid.The characteristic of magnetizing inrush current for UHV transformer was obtained by simulation.The paper also analyzed the impact on differential protection from it. Closing resistor inside circuit breaker method was proposed to restrain magnetizing inrush current.The method cuts down the amplitude and accelerated the attenuation speed of it, so as to restrain it. The simulation analysis verified the effectiveness of the method.

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A Method to Estimate Voltage Sag Caused by Transformer Excitation Inrush Current

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.494-495.1418 ◽

2014 ◽

Vol 494-495 ◽

pp. 1418-1423

Author(s):

Jin Hao Wang ◽

Chao Ying Yang ◽

Guang Qi Mu ◽

Xiao Qin Wu

Keyword(s):

Magnetic Flux ◽

Decay Time ◽

Magnetization Curve ◽

Voltage Sag ◽

Inrush Current ◽

Curve Segment ◽

Linear Features ◽

Transformer Core ◽

Curve Equation ◽

Nonlinear Magnetization

Due to excitation inrush current, no-load transformer accesses system can cause different degree of voltage sag. Therefore presents a method to estimate voltage sag caused by closing no-load transformer. Firstly, accord to the point of saturation magnetic flux and transformer core general single value curve equation to establish general nonlinear magnetization curve. Use the linear features of saturated magnetization curve segment to estimate the maximum inrush current and calculate the maximum depth of voltage sag. According to the magnetic flux decay time to estimate the duration of voltage sag. Simulate closing no-load transformer in a 10kV distribution network, and compare the simulated result with the calculated result. The results show that the proposed method is validity and accuracy.

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