This document summarizes an undergraduate final year project presentation on developing an intelligent zero net energy system using a hybrid solar system. A team of four electrical engineering students from the University of Engineering and Technology Lahore presented their project on April 5th, 2018. Their proposed system uses solar power, utility grid power, and a backup source to power loads while allowing bidirectional energy flow and implementing load management for efficient energy utilization. The team has developed hardware for maximum power point tracking, buck conversion, inversion, and load management and control. Their future work involves further developing and integrating the system components.

1. Department of Electrical Engineering,
University of Engineering and Technology, Lahore
Intelligent Zero Net Energy with Hybrid
Solar System
Group No: 20
Project Advisor: Dr. Tahir Izhar
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

2. Team Introduction
Taskeen Gull (Team Leader)
2014-EE-010
Specialization: Power
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018
Saba Zahid
2014-EE-006
Specialization: Power
Tuba Majeed
2014-EE-011
Specialization: Power
Hukmran Hussain
2014-EE-040
Specialization: Power

3. Problem Statement
• The problem is the waste of renewable energy sources
as in our system we all depend on the WAPDA.
Secondly, in our solar based projects a lot of energy is
wasted because of inefficient use. Moreover, in existing
system flow of power is only in forward direction
however, we can implement bi-directional flow of
energy.
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

4. Proposed Solution
• Development of a system using three sources i.e. solar,
utility grid and backup, to serve the load.
• Solar Panel is taken as input and its voltage and current
variations are sensed using them the maximum power
point tracking is done and a pulse is generated.
• Pulse was used for switching in a DC-DC non-isolated
buck converter and then boosted to required level.
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

5. Proposed Solution
• A grid tied inverter is designed to convert DC to AC
that will be synchronized with utility.
• Net meter is used to ensure the bidirectional flow of
energy.
• During power outage backup system will serve the
load.
• Load Management is done for intelligent electricity
utilization in order to cut down the cost to minimum.
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

6. Block Diagram
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018
DC-AC
inverter
Solar
Panel
Utility Grid
DC-DC isolated
Converter with
MPPT

7. Block Diagram
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018
Backup
source
LoadNet-meter
(Bi-directional flow)

8. Flow Diagram
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

9. Flow Diagram
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

10. Advantages
• Design of efficient hybrid residential solar system is
provided Allowed residents to produce their own
electricity using solar system, selling excess of it to
WAPDA and buying from WAPDA when needed.
• System provided cheapest electricity cutting down
expensive electricity bills.
• Energy is saved by performing load management.
Using energy saving devices and automatic switching
according to load requirement.
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

11. Applications
• Efficient for the solar based projects as solar power
house.
• Bi-directional flow of energy share the burden on
WAPDA.
• Good source of income if sell extra power to other
users.
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

12. Applications
• Provides service to the residential loads
• Minimum usage of appliances through load
management helps to cut cost to minimum.
• Increase the life time of the different appliances
through optimized usage.
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

13. Audience
• Residential level users
• Commercial electricity users.
• We will market our prototype through industries
working on inverters and solar panels as it is a design
project and we can design our components for any load
demand according to monthly average use of a
customer.
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

14. What we have done so far?:
• Maximum Power point tracking (MPPT)
• Non-isolated Buck converter
• DC-AC Inverter
• Load Panel Circuit Configuration
• Load Management
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

15. Hardware Developed
We have developed the hardware of the following parts:
• MPPT circuit
• DC-DC Buck Converter
• DC-AC Inverter
• Load Management circuit
• Load Panel
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

16. Hardware Developed
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

17. Hardware Developed
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

18. Future Deliverables
• MPPT circuit
• DC-DC Buck Converter
• DC-AC Inverter
• Load Management circuit
• Load Panel
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

19. Future Deliverables
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018
• Synchronization of grid with Solar Panel
• Compilation of project components

20. Gantt Chart
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

21. References
• An enhanced MPPT technique for high gain DC-DC
converter for photovoltaic applications – IEEE-
Conference Publication", Ieeexplore.ieee.org, 2018.
[Online]. Available:
http://ieeexplore.ieee.org/document/7530292/.
[Accessed: 28- Jan- 2018].
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018

22. References
• En.wikipedia.org. (2018). Load management. [online] Available
at: https://en.wikipedia.org/wiki/Load management [Accessed 1
Apr. 2018]
• Solardirect.com. (2018). Solar Electricity - Photovoltaic
Systems and Components, Grid-Connected Solar Electric
Systems, Off-Grid (Stand Alone) Solar Electric Systems, PV
Modules, PV Inverters, PV Chargers, PV Battery, PV
Mounting, Small Solar Electric Devices. [online] Available at:
http://www.solardirect.com/pv/systems/systems.htm [Accessed
1 Apr. 2018].
Undergraduate Final Year Project Presentation
Dated: 5th April, 2018