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The main object of this paper is to design and implement a DC-to-DC boost converter that regulates output voltage to a desired value and can be used in Photovoltaic system appliances or other unregulated sources. To regulate the output voltage of the boost, a feedback loop with Proportional-Integral-Differentiator (PID) controller is employed. The...
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... Hence, the duty cycle of the boost converter is controlled. The MOSFET switch of the boost converter is turned ON or OFF state based on the given PWM signal that produced by Furthermore, the boost converter can be operated with continuous condition (CCM) mode and discontinuous condition (DCM) mode depending on the inductor current shape [25,26]. In CCM mode, the inductor current flows continuously and does not reach zero as shown in " Fig.6". ...
... The boost circuit is adopted with CCM mode for ideal case (current through the switches at OFF state is zero and drop voltage across the switches at ON state is zero). When the MOSFET is in ON (closed), the input voltage V in is applied across the inductor and causes a change in the inductor current (∆ − ) as follows [25] : ...
... In steady-state conditions for the boost converter, the inductor average voltage should be equal to zero during the total switching period, = + . So, the energy flows into the inductor over one switching cycle [25]. Therefore, has the same value during the starting and the ending of the switching cycle, which can be written by: ...
In standalone photovoltaic (PV) inverter a total cost and harmonic content are most two problems that should be satisfied. In general, the main problems of square and modified sine wave inverters are a higher harmonic content and present the low frequency (LF) or higher frequency (HF) transformer in its configuration. For this reason, this paper presents a single-phase transformer-less inverter for standalone PV application. A robust unipolar Sinusoidal Pulse Width Modulation (SPWM) control technique is presented to control the inverter switches and obtained a sinusoidal output current and voltage. The proposed inverter is incorporated with the boost converter to provide a high DC voltage level and maximum power point tracking (MPPT) technique from the PV system. The low cost perturb and observe (P&O) MPPT technique is used. The performance of the proposed inverter is evaluated using Physical Security Information Management (PSIM) software. Also, the proposed inverter has been capable to generate pure sin wave of voltage and current during all conditions, when it runs in variations of weather conditions or the load variations. Finally, a well THD content in output current waveform is achieved at different solar irradiation.
The tendency for the price of using solar PV (photovoltaic) to become cheaper means that the portion of the use of this solar energy source is encouraged to be larger along with the addition of the portion of renewable energy (EBT) generators based on PLN's 2021-2030 Electricity Supply Business Plan (RUPTL). As a step to mitigate this problem, a power electronics circuit application is needed in the form of a boost converter or what can be called a step-up DC-DC converter. In this study, the boost converter design modeling is made a closed loop. There is feedback by adding a PID controller to adjust the duty cycle as a function of switching on or off MOSFET so that the output voltage is as desired (setpoint) and adjusts to needs of load. Open-loop design modeling is also included as a comparison. The design stage begins with determining the circuit design, calculating component specifications, and simulating using MATLAB R2013a software and hardware implementation. From the test results, it was found that the boost converter can increase the solar PV voltage varies (17.34-19.13 Volts). In the closed loop boost converter circuit with a constant load of 129.96 Ω with varying duty-cycle value set by PID controller with value of Kp=0.005 Ki=9.75 Kd=0.00000029, the average output voltage is 36. 0067 Volts and stable at the desired setpoint of 36 Volts.
