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Grid-connected photovoltaic power system consists of simulation of solar modules, inverter main circuit, driver circuit, maximum power point tracking circuit, the MCU control display system and the FPGA, protecting circuit. Inverter main circuit is the analog output of solar modules through the inverter main circuit DC into AC power reverse, and then through the filter, the output stable AC; one FPGA...
Performance, efficiency, cost of the power converters and their associated control, are important considerations for the commercialization of renewable power sources. In view of this, this paper proposes a reliable and low cost power electronics interface for photovoltaic energy systems, using a single DSP controller. The proposed approach achieves the following: (a) integrate the dc-dc converter...
This paper focuses on the modeling, controller design, simulation and analysis of a two-string photovoltaic (PV) and storage system connected to grid via a centralized nine-switch three-level inverter. A circuit-based PV array model is presented for use. A boost converter is employed to enable PV to operate at its maximum power point. The storage system consists of a capacitor bank connected at the...
This paper reviews the power decoupling techniques of micro-inverters used in single-phase, grid-tied PV systems. The power decoupling techniques are categorized into three groups: (1) PV side decoupling; (2) DC link decoupling; and (3) AC side decoupling. Various topologies and techniques are presented, compared, and evaluated against the size of capacitance, efficiency and control complexity. Finally,...
The utilization of voltage source inverter (VSI) connected to the grid in photovoltaic systems requires application of control systems capable of regulating the active and reactive output current, ensuring high power quality levels and achieving relative immunity to grid perturbations. In the single phase system the LCL filter is adopted, which can reduce the required filtered inductance and the cost...
Based on conventional current hysteresis band control, an adaptive hysteresis band control algorithm featuring dynamically modulate hysteresis band width was presented in this paper, and will be used in the application of photovoltaic grid-connected inverter. In the platform environment of Matlab/Simulink, the simulation modules of photovoltaic array, hysteresis band calculator, adaptive hysteresis...
Nowadays, photovoltaic power systems are widely accepted due to the worldwide energy shortage. To attain near sinusoidal outputs of the grid-connected photovoltaic system, improve the power quality, and decrease the energy loss, this work presents a novel photovoltaic grid-connected power conditioner (PVPC) system based on a hybrid multilevel inverter. In the proposed structure, each phase of the...
Power converters for renewable energy systems are expected to have a high lifetime, low costs and a very high efficiency over a wide input power and voltage range (e.g. for photovoltaic and fuel cells). Although very high efficiencies can be achieved with hard-switched power converters operating with state of the art semiconductors, hard-switching results in several disadvantages such as conducted...
Renewable energy has been a great concern to obtain ecological society that can continuously grow. As an attractive solution, the fuel cell cogeneration system has been attracted and some first products have been developed in Japan and in some other centuries/areas. A product in Japan, which is the first developed system and few hundreds of the sets are under operation in Japanese homes, has been...
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