Voltage Sag Compensation Technique for Three-Level Voltage Source Inverter based Dynamic Voltage Restorer

2017 ◽

Vol 8 (3) ◽

pp. 1101

Author(s):

Deshpande Chinmay V. ◽

Deshpande Chaitanya V. ◽

Deokar Sanjay A.

Keyword(s):

Current Source ◽

Control Technique ◽

Voltage Source ◽

Voltage Sag ◽

Inrush Current ◽

Voltage Source Inverter ◽

Reactive Component ◽

Dynamic Voltage Restorer ◽

Voltage Restorer ◽

Dynamic Voltage

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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Optimum design of dynamic voltage restorer for voltage sag mitigation in distribution network

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v10.i3.pp1364-1372 ◽

2019 ◽

Vol 10 (3) ◽

pp. 1364

Author(s):

Deshpande V. Chinmay ◽

Deshpande V. Chaitanya

Keyword(s):

Control Technique ◽

Voltage Source ◽

Voltage Sag ◽

Power Electronic ◽

Dynamic Voltage Restorer ◽

Q Theory ◽

Voltage Restorer ◽

Dynamic Voltage ◽

Simulation Results ◽

Inverter Topology

<p><span lang="EN-US">DVR is power electronic based device used for mitigation of voltage sag problem. In this paper, various inverter topologies such as Voltage source inverter, Z source inverter and Embedded Z source inverter are used and compared for operation of DVR. Here dual p-q theory is implemented as control technique which have excellent transient response and speed. Different inverter configurations are implemented for DVR and its simulation results are presented and compared. It has been observed that Embedded EZ source inverter topology is found to be effective. The Embedded EZ source inverter topology and its hardware results are presented and compared.</span></p>

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Contemporary Control of DG Integrated DVR for Sag, Swell and Harmonic Mitigation

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v8i5.pp2721-2730 ◽

2018 ◽

Vol 8 (5) ◽

pp. 2721

Author(s):

Syed Suraya ◽

P. Sujatha ◽

P. Bharat Kumar

Keyword(s):

Control Strategy ◽

Voltage Source ◽

Voltage Sag ◽

Voltage Source Converter ◽

Voltage Profile ◽

Pv System ◽

Dynamic Voltage Restorer ◽

Voltage Quality ◽

Voltage Restorer ◽

Dynamic Voltage

This paper presents a novel control strategy to control DG integrated DVR (dynamic voltage restorer) for mitigation voltage quality problems. Power quality is the most concerning areas in power engineering and voltage quality is of prime focus. Voltage sag, voltage swell and harmonics in voltage causes deterioration in quality of voltage delivered to load. A minor disturbance in voltage profile can degrade the performance of load. Dynamic voltage restorer is a quick responsive custom power device for voltage quality improvement. Photovoltaic (PV) system is considered as DG and output voltage of PV system is boosted with a boost converter to support voltage source converter of DVR. DG integrated DVR with novel control strategy for mitigation of voltage sag, swell and voltage harmonic is presented in this paper. The power system model with DG integrated DVR is developed and results are obtained using MATLAB/SIMULINK. Results are discussed during pre and post sag/swell condition with compensation and THD in voltage is maintained within nominal values.

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Performance analysis of modified dynamic voltage restorer (DVR) employed to a grid connected solar PV system

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.13625 ◽

2018 ◽

Vol 7 (3) ◽

pp. 1351

Author(s):

Rakeshwri Pal ◽

Sushma Gupta

Keyword(s):

Power Quality ◽

Voltage Source ◽

Voltage Sag ◽

Solar Pv ◽

Generation System ◽

Pv System ◽

Dynamic Voltage Restorer ◽

Voltage Restorer ◽

Dynamic Voltage ◽

Solar Pv System

Among various power quality problems, voltage sag and swell are dominant where loads are very sensitive to the voltage disturbances. Various custom power devices are introduced recently to overcome these voltage issues, dynamic voltage restorer (DVR) is one of them. It offers very cost effective solution for problems such as voltage sag, swell and harmonics by establishing the proper voltage level during voltage disturbances to protect sensitive loads. In this paper, performance of DVR to improve power quality is done for solar photovoltaic (PV) based generation system feeding the grid and the three phase linear load. Solar PV generation system is implemented with an incre-mental conductance (IC) maximum power point tracking (MPPT) technique. The DVR is connected in between solar PV system and load. The basic structure of DVR is modified by using the photovoltaic system as an alternative to DC source and in place of conventional 2-level voltage source converter (VSC) neutral point clamped (NPC) multi level inverter is used. The system performance is analyzed in the MATLAB/Simulink environment. The simulation results justified the efficiency of modified DVR in the mitigation of voltage sag in distri-bution system. Improvement of power quality by stabilizing voltage during fault and promoting renewable energy is the main framework of this work.

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