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This paper presents a new structure based on a line-commutated inverter (LCI) for photovoltaic (PV) applications. The proposed LCI circuit is able to inject the DC power to the grid at the unity power factor and with reduced harmonic levels. The proposed circuit with voltage-based maximum power point tracking (MPPT) is implemented in grid-connected PV system. The experimental results show that proposed...
It is difficult issue for Photovoltaic (PV) studies to create different types of solar irradiance for PV panels because of various temperature and weather conditions. This paper proposes a solar irradiance emulator based on dc power supply. The proposed emulator allows for building the desired radiation in the photovoltaic panel tests. It is particularly useful to test PV converters such as inverters...
Harmonic voltage compensation of the load connected to the point of common coupling (PCC) by using a series of active power filter (SAPF) based on a single phase cascaded multilevel inverter is proposed. The proposed multilevel inverter are presented in detail. The inverter has the ability of acting as a harmonic source when the reference is a non-sinusoidal signal. To achieve this, a simple control...
This paper proposes a simple circuit-based Photovoltaic (PV) simulator for testing Maximum Power Point Tracker (MPPT). The main advantage of proposed simulator is that being able to perform with low cost instead of the expensive commercial solar array simulators. In summary, the structure of the simulator is very simple due to not requirement extra components and complex control circuits, it only...
A topology of series active power filter (SAPF) based on a single phase half-bridge cascaded multilevel inverter is proposed to compensate voltage harmonics of the load connected to the point of common coupling (PCC). The main parts of the inverter are presented in detail. Any voltage reference can be easily obtained by a simple control with the proposed inverter. Therefore, the inverter acts as a...
Nowadays, DC/DC converters are widely used in industrial applications and renewable energy systems. A SEPIC (single-ended primary inductance converter) DC-DC converter is capable of operating in either step-up or step-down mode and commonly used in a battery charger system. This paper presents the modeling and analyzing of the SEPIC with coupled and uncoupled inductors. In this study, the state-space...
The output power of PV system can drastically decrease when photovoltaic modules under partially shaded condition. Therefore, partially shaded condition is a big issue to proper tracking maximum power point in photovoltaic systems. This paper proposes a new simple method which can track the global maximum power point under this condition. The proposed method is obtained by combining the incremental...
This paper proposes a new method which can track the maximum power under partially shaded conditions (PSC). Global maximum power (GPmax) searching method is used in this study, that is obtained by combining incremental conductance (IncCond) and scanning approach method which utilizes duty cycle sweep to track the global maximum when the PV array operates under PSC. This method is used in photovoltaic...
This paper presents a grid-connected photovoltaic (PV) power conversion system based on a single-phase multilevel inverter. The proposed system fundamentally consists of PV arrays and a single-phase multilevel inverter structure. First, configuration and structural parts of the PV assisted inverter system are introduced in detail. To produce reference output voltage waves, a simple switching strategy...
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