Optimal control of output power of micro-inverter based on circuit design

Abstract

In the context of energy shortage and increasingly serious security problems in the world, the utilization of renewable energy has attracted much attention. This paper studies the maximum limit of grid-connection, starting from the integrated control strategy of single stage photovoltaic grid-connection system, using the mathematical model and method of solar cell array. And the topological structure of the single-stage photovoltaic power generation (pv) grid system, based on the system in mathematics The research modem proposes a variable step MPPT algorithm and decides the integrated control strategy of the single-stage photovoltaic grid-connected system. Finally, combined with industrial practical applications, this article provides a single-stage grid-connected solar power system based on RTW limited EatTimworks technology TMS 320 F 28,335 series DS, which improves the realization of the hardware circuit and the stability of the single-stage photovoltaic grid-connected system. This article will analyze and compare the topological structure of two single-stage photovoltaic grid-connected systems. Based on the decision of the bipolar topology, the overall control method of the system is explained, and the advantages and disadvantages of the two overall control methods are pointed out. Then, establish a photovoltaic simulation model to display the output characteristics of the photovoltaic array, analyze and compare the three commonly used MPPT tracking methods, adopt a variable step integrated MPPT tracking control method, show the advantages of this method, and verify it through simulation. Finally, this article describes the outline of the voltage and current-based double closed-loop grid-connected inverter control strategy, establishes the corresponding mathematical model, and analyzes and analyzes the three commonly used full-bridge inverter SPWM modulation modes through simulation. Compared.