A novel auxiliary unit based high gain DC-DC converter for solar PV system with MPPT control

DC-DC converters are widely used in hybrid power supply systems. A buffer source of electrical energy (most often a battery bank) and its charging and discharging devices are integral parts of such systems. In systems where the battery bank voltage is less than the DC-bus voltage and galvanic isolation is not required, the Weinberg converter is widely used as a discharge device, for example, in spacecraft power supply systems. The current trend in the development of hybrid power supply systems is to increase the power density of the system. Increasing the operating frequency is the simplest and most effective way to increase the power density of converter. A differential characteristic of this converter is the zero-current switching (ZCS) of transistors, which occurs due to the influence of the leakage inductance of coupled-inductors and the leakage inductance of the transformer. The paper presents an analysis of the influence of leakage inductances on the operation of the converter and a method of determining a level of turn on switching losses of transistors, which allows to ensure the necessary level of efficiency of the converter. The results of simulation modeling of the converter confirm the effectiveness of this method.

Section: Resultsmentioning

confidence: 99%

“…Stages 1 and 5 are soft turn on stages of transistors VT1 and VT2. Stages 3 and 7 are stages of spike in the output current, these stages increase the current stress of the output capacitor С2, the rms value of the capacitor current is determined by (7).…”

Section: The Proposed Methodsmentioning

confidence: 99%

Optimization of switching losses of the Weinberg converter

Naprienko,

Shtein

2023

“…Suppose the switch goes to the closed (in the "on" state). In that case, the inductor creates a magnetic field, and current flows through it clockwise, allowing the inductor to store some energy [12]- [16]. The left side of the inductor has positive polarity.…”

Section: Figure 1 Factors Affecting Photovoltaic Systemmentioning

confidence: 99%

Modelling and implementation of a photovoltaic system through improved voltage control mechanism

Usmonov,

Iqbal,

Saleem

et al. 2024

Renewable energy dependence is increasing daily due to the decaying of conventional energy sources. Another primary reason is the increment of pollution as well as global warming. Various alternate energy sources are being used to replace conventional ones. Among them, the prominent photovoltaic source provides clean and green energy. This research focuses on energy production through the photovoltaic source. The photovoltaic cells combination is used along with the boost converter to get the maximal power output. The maximum power point tracker was designed and implemented to obtain the optimal power from the photovoltaic cells, which do not provide the desired results. Therefore, the voltage control method is an alternative to the maximum power point tracker. Both methodologies compared at different intensities of solar light. The load is attached to the photovoltaic output to test its reliability and smooth performance. The system is designed using MATLAB simulation, and the desired results are obtained.

“…The shunt value is very high, while the series value is very low. These resistance values don't have much of an effect on how well the cells work as a whole, which is shown in (1) and (2) [18], [19].…”

Section: Simulation Of Pv and Mppt Systemsmentioning

confidence: 99%

Modified PDPWM control with MPPT algorithm for equal power sharing in cascaded multilevel inverter for standalone PV system under partial shading

Yahya

Yahya²

2023

<span lang="EN-US">In this paper, a modified particle swarm optimization (MPSO) based maximum power point tracking (MPPT) controller is used to track the maximum power of a PV system using DC-DC boost converter technology. </span><span lang="EN-GB">To raise the PV module's input DC voltage, a DC-DC boost converter was employed. The boost converter powered the DC-AC multilevel PWM inverter, which then delivered the output AC voltage to a solitary inductive load. Cascaded multilevel inverters are often used to condition power in renewable energy applications because they are easy to use and have few parts. Ripples in the voltage of DC link capacitors cause low order harmonics and inter harmonics in the multilevel inverter's output voltage. Phase disposition pulse width modulation (PDPWM) has the fewest harmonics. The inverter cells' power delivery is not equal in this manner. In the present paper, a strategy for improving sharing of power PDPWM for photovoltaic applications is proposed. The modified PDPWM is used on a 9-level inverter where each cell is connected to a PV array running at maximum power point tracking MPPT and under partial shadowing for single phase multilevel inverters. The MATLAB/SIMULINK software was used to do simulations, and the findings demonstrate that the method presented is effective at balancing the way power is shared between different inverter cells and reducing the voltage ripple of the DC link capacitor.</span>