What Are The Advantages And Disadvantages Of Renewable Energy

2440 Words 10 Pages
In recent days, the increase in continuous power demand and very slow generation of power is making researchers to work more on efficient power generation. On the other side, the regular price hike in fuel, increase in global warming and adversely effecting environment pollution. Global warming is a good lesson for all of us, these challenges for engineers are encouraging them to work more on clean, renewable and eco-friendly sources. By using renewable energy sources greenhouse emissions can be controlled. All renewable energy sources are self-sustaining energy sources, they produce energy on themselves. Recycling of energy can be achieved through renewable energy. There are many renewable energy sources like
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• Back up is always available for any kind of circumstances.
• Power bill will be a big issue.
• Service fee will be charged for supplying electricity.
• This system cannot guarantee a constant power supply to home.
• Smart meter and load sizing should be maintained.
Stand-Alone Solar System
Usually this kind of system is used for residential purposes. A storage system is added to the grid connected solar system by replacing the grid with battery, capacitor kind of things. In this project, I’m going to use battery as a storage system. It consists of PV array, MPPT algorithm, boost converter, inverter, bi-directional converter and a battery storage system.
• System power is unrestricted and can add more panels if needed.
• No more issues with power bill.
• Generates clean and continuous supply throughout the day and night.
• No need of smart meter.
• Emergency backup is not available.
• System implementation cost is high.
• Maintenance is required throughout the year.

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Fig. 6.3 Subsystem model of Solar Panel
A boost converter circuit is used to boost the voltage with the inductance value of 0.01H and capacitance value of 2mF. Fig. 6.4 Boost Converter
This is the most commonly used algorithm for maximum power point tracking. In this algorithm the controller adjusts the voltage by using the array voltages. If the power increases, it adjusts until the power stops increasing and sets the value. It is also called as hill climbing method.

Fig. 6.5 P&O Algorithm Fig. 6.6 Simulink model for P&O Algorithm

The main purpose of this thesis is to control the DC bus voltage. We are using a controlled current source, PID controller and a reference voltage to control the bus voltage. Fig. 6.7 Voltage Control Loop Fig. 6.8 Solar Panel with Controlled DC Bus

The following graphs are for MPPT circuit, voltage control loop is not included while this simulation. I tried simulating for different irradiances. I performed this simulation at 300K temperature and for 72 cells connected in series and

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