Dynamic Voltage Restorer (DVR)2

Views:
 
Category: Education
     
 

Presentation Description

Describes the problem of voltage sags and swells and its severe impact on non linear loads or sensitive loads. The dynamic voltage restorer (DVR) has become popular as a cost effective solution for the protection of sensitive loads from voltage sags and swells. The control of the compensation voltages in DVR based on dqo algorithm is discussed.

Comments

Presentation Transcript

Modeling And Simulation For Voltage Sags/Swells Mitigation Using Dynamic Voltage Restorer (DVR):

MANDAVA INSTITUTE OF ENGINEERING & TECHNOLOGY VIDHYA NAGAR,JAGGAIAHPET-521175 ELECTRICAL & ELECTRONICS ENGINEERING DEPARTMENT Modeling And Simulation For Voltage Sags/Swells Mitigation Using Dynamic Voltage Restorer (DVR) By P. Lakshmana Rao (08FF1A0226) K. Durga Praveen (08FF1A0214) Nagulmeera (08FF1A0233) A.V.V.S. Kushal Kumar (08FF1A0261) Guided by R. Sai Srujan

ABSTRACT::

Describes the problem of voltage sags and swells and its severe impact on non linear loads or sensitive loads . The dynamic voltage restorer (DVR) has become popular as a cost effective solution for the protection of sensitive loads from voltage sags and swells. The control of the compensation voltages in DVR based on dqo algorithm is discussed. ABSTRACT :

INTRODUCTION ::

INTRODUCTION : A voltage sag is a short duration decrease in voltage values. Voltage sags : Causes : short circuits (faults) on the electric power system, motor starting, customer load additions, and large load additions in the utility service area.

PowerPoint Presentation:

A voltage swell is a short duration increase in voltage values. Voltage swells : Causes: By large load changes and power line switching.

PowerPoint Presentation:

DVR operation

PowerPoint Presentation:

Equivalent circuit of DVR

Proposed system configuration:

Proposed system configuration

PowerPoint Presentation:

Input Vref Convert to dqo Coordinate System Convert to DQO Generate signal for PWM PLL Convert to Vabc Coordinate System Vsupply Va , Vb , Vc Compare

PowerPoint Presentation:

Three-phase voltages sag: Source voltage Injected voltage Load voltage

PowerPoint Presentation:

Three-phase voltages swell: Source voltage Injected voltage Load voltage

PowerPoint Presentation:

The simulation shows that the DVR performance is satisfactory in mitigating voltage sags/swells. The DVR handles both balanced and unbalanced situations without any difficulties and injects the appropriate voltage component. From simulation results also show that the DVR compensates the sags/swells quickly and provides excellent voltage regulation. The supply voltage to keep the load voltage balanced and constant at the nominal value.

PowerPoint Presentation:

THANK YOU