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In this paper it is presented a detailed description of the analog implementation of the control for a DC-AC converter composed by a DC-DC Zeta converter and a low frequency inverter. Using only analog components, it was developed the MPPT technique based on linearization of solar panel characteristic around the MPP, a feedforward control and a robust PWM sine wave modulator. This simple and low 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...
On the basis of the research on grid-connected technology of distributed generation system, in order to extend the full advantage of single-phase photovoltaic grid-connected energy and gain rapid electric energy conversion and high quality electric energy and achieve accurate control and reactive power and harmonic compensation, a control scheme of grid-connected in conjunction with harmonics presented...
Distributed power generation systems (DPGSs) based on inverters require reliable islanding detection algorithms (passive or active) in order to determine the electrical grid status and operate the grid-connected inverter properly. These methods are based on the analysis of the DPGS voltage, current, and power in time or frequency domain. This paper proposes a time-frequency detection algorithm based...
In this paper, the phenomena that occurs when connecting a PV energized micro-grid to the public grid, is presented. A PV inverter system, for supplying the micro-grid, was designed and simulated using Matlab-Simulink. The simulations are done for three different power factors, showing in this way how the power factor can influence the behavior of the system, especially when the transitory regime...
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