Micro Grid enhancement via the Grid tie Pv-inverters in active distribution Networks

Project Title

Micro Grid enhancement via the Grid tie Pv-inverters in active distribution Networks

Project Area of Specialization Electrical/Electronic EngineeringProject Summary

This project provides the detailed overview of grid connected photovoltaic (PV) inverter in active distribution networks. In order to extract the maximum power from the PV system maximum power point tracking (MPPT) technique has been used. A Buck-Boost converter (DC to DC converter) is controlled via the Perturb and Observe method to achieve the MPPT. A single phase H-bridge inverter is used for the conversion of DC power of buck-boost converter into AC power. Buck-Boost of the system is connected to the battery bank which stores the energy that is used in case of power failure. The performance of the grid-tied inverter depends to a great extent on the control technique in which the synchronization of the grid voltages, phase angle and frequency, with the output voltages, phase angle and frequency of the PV system is applied. This system is simulated in the MATLAB/SIMULINK. For the practical part, a single phase H-bridge inverter is planned and built. The controlled switching of inverter is completed digitally using PIC18f452 microcontroller. For a close loop control some extra filtering and protection circuitry is further implemented. The system is also practically tested and verified by changing the solar irradiance and grid voltages.

Project Objectives

The main objectives of this project are:

? To build a grid tied photovoltaic system for domestic purpose.

? To synchronize the PV system with grid

? To achieve MPPT (without tracking the sun light) in dynamic condition

Project Implementation Method

In order to extract the maximum power from the PV system maximum power point tracking (MPPT) technique has been used. A Buck-Boost converter (DC to DC converter) is controlled via the Perturb and Observe method to achieve the MPPT. A single phase H-bridge inverter is used for the conversion of DC power of buck-boost converter into AC power. Buck-Boost of the system is connected to the battery bank which stores the energy that is used in case of power failure. The performance of the grid-tied inverter depends to a great extent on the control technique in which the synchronization of the grid voltages, phase angle and frequency, with the output voltages, phase angle and frequency of the PV system is applied. This system is simulated in the MATLAB/SIMULINK.

For the practical part, a single phase H-bridge inverter is planned and built. The controlled switching of inverter is completed digitally using PIC18f452 microcontroller. For a close loop control some extra filtering and protection circuitry is further implemented. The system is also practically tested and verified by changing the solar irradiance and grid voltages.

Benefits of the Project

Micro Grid enhancement

Energy extraction and management

Domestic stand alone and grid connected inverter topology

Sustainable energy production

Improved efficiency

Technical Details of Final Deliverable

Improved efficiency of the existing micro grids consisting upon the Pv system

Details discussion about the losses and different applicable methods to extract maximum power from pv system

Technically enhancement of existing sub stations through the use of system

Final Deliverable of the Project HW/SW integrated systemCore Industry Energy Other IndustriesCore Technology OthersOther TechnologiesSustainable Development Goals Good Health and Well-Being for PeopleRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	40153
PV panel	Miscellaneous	1	3000	3000
Battery bank	Equipment	1	14000	14000
Transformer center tap	Equipment	1	15000	15000
MOSFET switch	Equipment	12	180	2160
Pt circuit	Equipment	1	1500	1500
CT circuitry	Equipment	1	1500	1500
Pic microcontroller	Equipment	1	993	993
Pic18f452 28 legs	Equipment	1	500	500
LCD display	Equipment	1	1500	1500