This document discusses the development of a hybrid renewable energy system using solar PV and wind power for a Dynamic Voltage Restorer (DVR). The system was designed to provide the energy required for the DVR to compensate for voltage sags, swells and outages instead of relying on the grid. The system was simulated in MATLAB and results showed the DVR was able to effectively mitigate power quality issues and provide better voltage regulation when powered by the hybrid renewable energy source.

1. Development of a Hybrid Renewable Energy System for a Dynamic
Voltage Restorer Using Efficient Power Converters

2. INTRODUCTION AND OBJECTIVES OF THE WORK
• Photo voltaic based power generation is becoming a widely used in many fields as an
alternate source in place the conventional grid. One such application is DVR Dynamic
Voltage Restorer,
• DVR mitigate problems in power quality such as voltage sags, swells and outages.
• Conventional DVRs depend upon the grid for storing necessary energy that is required
for sag and swell compensation.
• The objective of this work is to use renewable energy from solar PV and wind power
through a DC-DC converter for energy required for compensation.
• The work was simulated using matlab software and the output waveforms are given.

3. STRUCTURE OF THE DVR

4. Configuration of Wind and Solar PV based DVR

5. Simulation results

6. Simulation Circuit of the PV model

7. PV
model
with
Boost
Converter

8. MAXIMUM POWER POINT FOR
VARIOUS IRRADIATIONS
CONSTANT IRRADIATION
60 WATTS
STEP IRRADIATION
37 WATTS
TRAPEZOIDAL RRADIATION
42 WATTS

9. OUTPUT FROM PV SYSTEM

10. Wind Simulation Circuit

11. Simulation of hybrid solar –Wind DVR

12. SIMULATION OUTPUT OF PV- WIND INTEGRATED
OUTPUT VOLTAGE

13. COMPENSATION USING PWM TECHNIQUE
• The advantage of the PWM compensation techniques used here is
to achieve better efficiency and ease of controllability.
• Combined action is possible for both the pre-sag and in-phase
compensation method.
• In this technique the system initially restores the load voltage to the
same phase and magnitude of the nominal pre-sag voltage (pre-sag
compensation) and then gradually changes the injected voltage
towards the sag voltage phasor.
• Ultimately the compensated voltage is in same magnitude and
phase angle with the pre-sag voltage and slowly its phase angle
transferred to the sagged voltage

14. RESPONSE OF DVR TO VOLTAGE SAG

15. RESPONSE OF THE DVR TO VOLTAGE SAG
AND SWELL

16. RESPONSE OF DVR TO POWER OUTAGE

17. CONCLUSION
• In this work, a Wind-solar system is utilized as source for DVR to mitigate
voltage sag and outage.
• Integrated wind-solar systems generated voltage acts as a source to the
DVR to inject the decrease in voltage when voltage sags, outages are
occurred.
• In this work control scheme based on PWM has been implemented to
control the electronic switches in the VSC used in the DVR. This PWM
control scheme only requires voltage measurements. This characteristic
makes it ideally suitable for low-voltage custom power applications.
• The simulations carried out showed that the DVR provides better voltage
regulation capabilities.
• It was also observed that the capacity for power compensation and
voltage regulation of DVR depends on the rating of the integrated wind-
solar system.

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19. Thank You