Microinverter for Solar Applications

In order to find effective and affordable alternatives to the energy shortage that several countries face, there is a crucial requirement to start utilisation  of alternative  sources of energy, like solar energy. In developed nations, this requirement is compounded by the frustrat

Project Title

Microinverter for Solar Applications

Project Area of Specialization

Electrical/Electronic Engineering

Project Summary

In order to find effective and affordable alternatives to the energy shortage that several countries face, there is a crucial requirement to start utilisation  of alternative  sources of energy, like solar energy. In developed nations, this requirement is compounded by the frustration of inadequate or unstable electrical grids.The efficiency and affordability of renewable technologies have improved dramatically in recent years. With the growing awareness of carbon emissions and the harmful effects of greenhouse gases, it has been conclu

ded that government policies and incentives have been created for power generation using renewable resources. It also helps meet the renewable portfolio requirements for each state. They range from financial aid, rebates and tax benefits to consumers. These initiatives have helped to put sustainable energy into practice and improve it.

Project Objectives

It aims to be a viable design for future battery integration as a buffer between DC/AC and DC/DC converters. In order to increase solar panel energy performance, a new MPPT Algorithm has been developed and evaluated in a DC/DC converter. The regular method improves by 2.5% and the reaction time is lesser than 0.2 sec. 

 

Objectives 

·        To deliver maximum power for its attached module by conducting Full Power Point Tracking (MPPT).

·        The efficiency-factor compared to other structures of Photovoltaic (PV) systems.

·        To reject the eddy current effects.

·        Maximization of energy production

Project Implementation Method

By converting solar energy directly into electricity, the photovoltaic generation system produces power Via inverters mounted to the grid, photovoltaic power generation can be distributed to power system networks. Inverters connected to single phase grids are widely utilized for residential or low-power applications.Types of inverters connected to a single-phase grid are investigated. An instrument that converts DC power to AC power in the required output power and quantity is called an inverter.Phase controlled converters are called ultra-converted inverters when operating in inverter mode, but ultra-converted inverters require a storage area that produces an existing AC supply that is used for their circulation. This means that flexible converters operating in line cannot act as separate sources of AC power supply or as generators of variable frequency DC input power. Therefore, the edge voltage, frequency and waveform form of the inverters converted in the line cannot be changed.

 

First of all we will make the Gate driver. The gate driver will be operated by pulses and using Micrecontroller. After that we will design the h-bridge circuit. The advantage of using an H-bridge is that it will effectively control the energy flow with less amount of harmonics. Or either we can also use buck boost converters as they are also a Dc to Dc converters after that we will design a Ac to Dc converter.

When we complete the designing phase then we have to work on the MPPT controller. An electronic DC to DC converter that maximises the connection between the photovoltaic system (PV panels) and the battery bank or utility grid is an MPPT (maximum point tracker).

The connection circuit of the whole project would be through controller programming.It can be done by using a microcontroller. All the circuits will be on Single Layer Printed Circuit Board (PCB). In the end we will compile all the circuits along with their mechanism and after that we will test the project.

Benefits of the Project

With global warming and energy shortage affecting the entire world, our project would aim to mitigate these issues by utilizing solar energy to produce electricity An unlimited supply of electricity is achieved through is solar energy. Our project's key purpose is to facilitate the use of clean  sources of energy. In our lives, this venture is quite beneficial because one time commitment is set for life in this project. One day in the future, non-renewable electricity will cease, and renewable energy will be used.

The solar inverter we produce is just a test for potential ventures that implement advanced technology such as micro-controlled solar monitoring, charge management, etc. This demonstrates that solar inverters are quite affordable and easy to mount, such as plug and play, therefore the the demands for electricity are moved to utilising green energy sources. In this area, further developments are pending that will fundamentally change the source of energy, and the most significant role will be played by solar energy.

Technical Details of Final Deliverable

Allows an improved power yield of 5 - 16 percent every module.

• Promotes per-module performance.

• Prevents the rest of the modules from impacting inadequate modules.

• Higher "low-light" output than conventional inverters.

• Lesser loss of energy by using short DC cables.

 

Input Power:

The variable voltage Dc power supply provided the input power. To detach the inverter’s power supply, as well as to impart a greater source of impedance, equivalent to a PV string impedance at standard operating voltages, a 6 Ohms resistor was linked in series with each pole of the DC power source. The input power to the inverter's PV1 input was linked via channel 1 of the power analyzer and the input power to the inverter's PV2 input was linked via the power analyzer's channel 2. By utilizing internal shunts, currents were determined, and voltage was detected on each shunt's inverter side. At the supply end of the power cables, the voltage was determined, so the losses in such cables were counted in the calculated inverter losses.

 

Output Power:

The inverter output power was provided by the 15kVA transformer and was linked to the electricity grid at 600Vac. Line 1 (Phase A) was linked to the power analyzer via channel 3, line 2 via channel 4, and line 3 via channel 5. The calculations of current and voltage were related in the similar fashion as input power.

Final Deliverable of the Project

Hardware System

Core Industry

Energy

Other Industries

Core Technology

Clean Tech

Other Technologies

Sustainable Development Goals

Required Resources

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