DQ control of Grid tie inverter

Project Title

DQ control of Grid tie inverter

Project Area of Specialization Electrical/Electronic EngineeringProject Summary

In the view of brainstorming we had observed that world have many renewable energy resources for generation of electrical energy but we can’t use  them efficiently to meet the demand and we can’t afford to store surplus energy due to lack of advance technology.So we need some hybrid and indigenous design for this problem.

During literature survey we had decided to overcome this problem by using Grid Tie Inverter (GTI) technology because most of the renewable energy resources are produced in remote areas, long transmission and distribution lines varies the impedance of grid .This variation makes inverter unstable. Therefore we are going to work on the DQ control system of the grid tie inverter which will make it more robust for abnormal conditions.

The efficient utilization of renewable energy is only possible in grid Tie inverter system and this point motivated us that we can utilize our technical skills in this area of research to find out the problems and solution of it for the betterment of society and nation by fulfilling the electrical energy demand.

Project Objectives

Stabilize multi paralleled GCI (grid connected inverter) with weak grid.

Efficient injection of power into the grid

To minimize the losses in converting electrical power

Minimize Inverter current distortion

Minimize effect of grid voltage harmonic on inverter current.

Synchronize the grid and inverter in efficient manner.

To design and develop efficient control algorithm.

Improved efficiency to make the system robust.

Design the prototype for testing.

Project Implementation Method

1. Literature survey

We had completed our literature review regarding to the energy crises  and their effective utilization

1. Project designing phase

We had decided to design comprehensive mathematical model of GTI control system. In stream of Control system and power electronic so we had designed the DQ Control of GTI

1. Project testing phase

• Simulation base

In project test phase firstly we use Simulink software for testing the performance parameters of our design such as System stability, Harmonic compensation, current Distortions and Synchronization of inverter with grid .We had achieved well, all the performance parameter

• Design Prototype

Then we will be verified on prototype the proposed techniques, equation formulation, and simulation results. We use Digital controller of Texas Instruments C2000 Delfino MCU F28379D Launchpad™ for implementation of proposed control techniques which we had verified through simulation

1. Project evaluation phase 

At last stage we Tie the inverter with Grid by keeping all the Protecting circuitry and evaluation will be done to compare existing grid connected inverters with our proposed solution providing better stability and performance parameters and achieving our all objectives.

Benefits of the Project

• Meet the IEE standard (THD <5%).
• Provide sustainable solution for electricity problems to our nation
• Provide clean and green energy to consumer.
• Minimizes the energy Crises from Pakistan.
• Reduces the Transmission and Distribution lines losses.
• better stability margin than other inverters
• Better and Safe Power system
• Relatively low operating and maintenance costs. 
• Increasing the capacity of existing power system
• It will set the trend to develop the indigenous design for local problems.

Technical Details of Final Deliverable

• Instrumentation and Measurement unit:

This part include different sensors such as Hall sensors for current, voltage and heat measurement. The values can be used control and as will as display of different parameters.

• Power Coupling Unit: This is the point where our inverter and grid combined through proper synchronization in terms of voltage, current and phase by which better Tie safety for our power system is achieved.

• Digital controller : Digital control unit consisting of PLL and Current Control will be designed. The designed will be further implemented on hardware using C2000 Delfino MCU F28379D Launchpad™ development kit.

• Power Converter Unit:  5KVA inverter Prototype with Power factor more than 0.9 and sine wave would be developed which is robust and stable regardless of N-Paralleled inverters connected to grid and with proper optimized synchronization techniques having less than 5% THD as per IEEE Standards.

• User Interface Unit: A user friendly interface will be designed to observe and reconfigure or reset the system. The reading of power generation and power transfer will be recorded in this unit. The record will be available when ever required.

Final Deliverable of the Project Hardware SystemCore Industry Energy Other Industries Manufacturing Core Technology Shared EconomyOther Technologies OthersSustainable Development Goals No PovertyRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	68250
DSP development Kit	Equipment	1	15000	15000
Bidirectional meter	Equipment	1	10000	10000
Transformers	Equipment	4	450	1800
Rectifiers	Equipment	20	50	1000
Capacitors	Equipment	20	200	4000
Driver and Supplies for MOSFET	Equipment	10	500	5000
Heat sink for MOSFET	Equipment	10	50	500
Base for Drivers	Equipment	10	10	100
Screws	Equipment	100	5	500
Relays	Equipment	10	5	50
Sensors	Equipment	10	300	3000
Saftey Instruments	Equipment	10	100	1000
PCB Printing	Miscellaneous	100	20	2000
Driver and Supplies for MOSFET	Equipment	10	500	5000
Heat sink for MOSFET	Equipment	10	50	500
Base for Drivers	Equipment	10	10	100
Screws	Equipment	100	5	500
Relays	Equipment	10	5	50
Sensors	Equipment	10	300	3000
Saftey Instruments	Equipment	10	100	1000
PCB Printing	Miscellaneous	100	20	2000
Driver and Supplies for MOSFET	Equipment	10	500	5000
Heat sink for MOSFET	Equipment	10	50	500
Base for Drivers	Equipment	10	10	100
Screws	Equipment	100	5	500
Relays	Equipment	10	5	50
Sensors	Equipment	10	300	3000
Saftey Instruments	Equipment	10	100	1000
PCB Printing	Miscellaneous	100	20	2000