This document outlines a final year design project to develop a digital control system for a grid-connected inverter used with portable photovoltaic power stations. The project aims to efficiently convert solar power to AC, synchronize the inverter with the grid, remove harmonics, and inject excess solar power from portable solar panels on trailers to the electric grid. This would allow farmers to earn income from excess solar power not needed to power water pumps, minimize wasted energy, and contribute to sustainable energy goals. The proposed solution is to connect portable solar panels to the grid using an inverter with digital controls.

2. Final Year Design Project
Digital Control of Grid Connected Inverter for Portable Photovoltaic Power
Station
Saad Ali
Zohaib Ahmed
Muhammad Ibrar
Group Members:
Supervised By: Dr. Tila Muhammad

3. Contents
• Introduction
• Problem Statement
• Project objective
• Proposed Solution
• Block Diagram
• V Model
• Hardware Modules
• Application Areas
• Time Estimation
• Work Division
• Cost Analysis
• References

4. Introduction
In order to keep balance between demand and supply, the
utilization of photovoltaic panels for energy production has
attracted great attention. But, due to the high capital investment
in solar panels and battery banks, it is difficult to opt for it.
Moreover, the regular maintenance and replacement of the battery
bank need investment just like operational cost. Therefore, the
grid-connected inverter can be used as the remedy to the battery
bank.
We want to design a digital control of grid-connected inverter for
portable PV plants which will send excessive power to the grid and
the farmers can make earnings from it.

5. Problem Statement
Due to the increase in the tariff of electricity, most of the tube
wells are converted to solar-based power stations. Where, most of
the time water is not required for the crops and the power goes to
waste. A grid-connected inverter can be used for it but in most
cases, the availability of a grid in fields is not possible.
The interconnection of such inverters with the grid faces many
challenges including control issues.

6. Grid Connected Inverter

7. Project Objectives
There are two types of objectives that are targeted for this
project. Some of these objectives are to contribute to society
while the others are technical.
Social Objectives
 Social objectives are as follows:
 To minimize energy crises
 Save energy from wasting.
 Optimize the use of energy resources.
 Motivate farmers to get benefits from renewable energy
resources.
 Minimize carbon emissions and minimize global warming.

8. Project objectives
Technical Objectives
The targeted core technical objectives of this project are
mentioned below.
Efficient conversion of DC into AC.
Synchronization of the inverter with the grid.
Removing the harmonics that are added during DC to AC
conversion.
Design of control law for reliable and efficient operation.
Successful injection of power from portable PV plant to the grid.

9. Proposed Solution
To resolve the above issues, the solar panels can be installed
on a trolley to bring it to home when it is not in use and a grid-
connected inverter can be used to connect it to the national or
micro grid.
Therefore, in this project, we are going to propose Digital
Control of Grid Connected Inverter for Portable Photovoltaic
Power Station.
The grid-connected inverter can also save excessive energy
from wasting by supplying it to the national or micro grid. We
want to design and develop a grid-connected inverter for these
plants which will send excessive power to the grid.

10. Block Diagram

11. V Model
Requirements
Analysis
Design
Simulation
prototype
Testing
Submission
Documentation
Comparison
Retesting
Modification

12. Innovation
The existing grid-connected inverters are being imported
while we are going to design an inverter indigenously. The
indigenous design and development of the grid-connected
inverter will be cost-effective.
Moreover, our digital control design and its implementation
will bring some novelty to the existing grid-connected
inverter.

13. Advantages of Grid connected Inverter
1. Huge reduction in electricity bills.
2. Easy maintenance.
3. Synchronize with other sources of
power.
4. Better Return On Investment (ROI)
5. Very Affordable
6. Increases the value of your home

14. Milestone/
Deliverable
Timeline
Aug Sep Oct Nov Dec Jan Feb Mar Apr May
Requirements
Analysis
Design
Prototype
Testing
Modification and
Retesting
Comparison
Documentation
Submission
Project Milestones

15. Responsible
consumption
and production
Industry ,
Innovation and
economic
growth
Decent work
and economic
growth
Affordable and
clean energy
Sustainable
Cities and
communities
Sustainable development goals

18. Portable solar panel
Grid Tied Inverter
House
Meter
Grid