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FYP finalh

Jun 03, 2018

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    Brief Overview Wind and Solar energy is to charge the same battery

    efficiently

    Design to operate as a stand alone system

    Manual cycle driven generator

    Microcontroller will be used

    Priorities will be set

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    Block Diagram

    Solar Panel

    100 Watts

    Wind Mill

    100 Watts

    Manual cycle

    driven

    generator

    Battery

    20 AH

    Charge

    Controller

    Battery

    charging

    controllerSingle

    phase

    RectifierAC Load

    70 Watts

    Square

    wave

    Inverter

    DC Load

    25 Watts

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    Priorities

    Solar Panel will be given priority

    Both sources will be used

    Manually driven cycle generator as backup

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    Calculation Equations

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    Calculations

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    Back up Time for DC load

    Power Generated by 100 Watt Panel during 10 Hours

    = 100W*0.80*10Hours = 800 Wh

    Total Power given by battery = 7.1hours * 70 Watts= 497 Wh

    So Power left for DC load is = 800Wh 497 Wh = 303 Wh

    We can use 30.3 Watts load for 10 Hours

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    Solar panelDC-DCBoost

    Converter

    Batterychargingcontroller

    Battery

    Voltage andCurrentsensingCircuit

    u-controllerDuty cycle

    DC-Load

    MPPT

    AC LOAD

    Solar Part Block Diagram

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    MPPT

    Why MPPT is needed?Power supplied by Panel Vary within the day.

    To track max power and transfer it to the load side.

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    Current and Voltage Sensing

    Circuitry

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    Current vs Voltage Graph

    MPP

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    PIC Micro-controller

    I-V relationship used to track maximum power

    PIC output will be given as input to transistor of boostconverter

    Algorithm designed to track max power by changing Duty

    cycle D.

    PIC microcontroller

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    Algorithms to Track Max. Power

    Point

    Perturb & ObservationMethod.

    Incremental ConductanceMethod.

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    Perturb & Observation Method

    Modifying the panel voltage is done by modifyingthe converter duty cycle

    The basic algorithm uses a fixed step to increase ordecrease voltage

    The size of the step determines the size of thedeviation while oscillating about the MPP

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    /START

    DUTY =50%

    Increase VoltageorIncrease Duty cycle

    Decrease VoltageorDecrease Dutycycle

    Yes

    No

    Yes

    No > >

    Pk = Current power reading

    Pk-1 = Previous power reading

    Increase duty cycle

    Decrease duty cycle

    P & O Algorithm

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    Design of ADC and PWM Module

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    Codeunsigned int volt,curent,power;void main(){ short duty = 0; //initial value for dutyADCON1 = 0xFF;TRISA = 0xFF;PWM1_Init(1000); //Initialize PWM1PWM1_Start(); //start PWM1PWM1_Set_Duty(duty); //Set current duty for PWM1

    volt = ADC_Read(1);

    curent = ADC_Read(2);power = volt*curent;if (volt>PORTB && dutyPORTC){

    Delay_ms(40);duty = duty + 1; //increment current_dutyPWM1_Set_Duty(duty); //Change the duty cycle

    }else if (volt0 && power>PORTB)

    {Delay_ms(40);duty = duty - 1; //decrement dutyPWM1_Set_Duty(duty);

    }Delay_ms(10); // slow down change pace a littlePORTB=volt;PORTC=power;

    }

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    Battery Charging Controller

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    Square Wave Inverter

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    Timeline

    Work Completed

    Battery Charging Controller

    Calculations for charging current, charging time and backup time

    Current and voltage sensors

    Square wave inverter

    Coding of microcontroller

    Work Under Progress

    Designing of boost converter

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    TimelineWork to be done

    Selection of generator for wind mill

    Selection of manual cycle driven generator

    Designing to work as a hybrid system

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    Thank You

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