FPGA-based real-time simulation model design method for photovoltaic cells

Abstract

A photovoltaic cell real-time simulation model design method based on FPGA comprises the following steps that: 1, aiming at a photovoltaic cell model, the model is built in FPGA, and the model is divided into two parts, namely an electric system and a control system; 2, simulation time is set t=0, and the simulation is launched; 3, the simulation time is pushed forward by a step size, then t= t + delta t; 4, the output voltage V and the output current I of a photovoltaic cell is calculated out by the electrical system, the output voltage V and the output current I of the photovoltaic cell are transmitted into the photovoltaic cell model of the control system, and then photo-generated current source current Iph and diode current Id are involved into the calculation of the electrical system in the forms of controlled current sources; 5, the simulation time is judged whether a simulation ending time is reached, and if the simulation ending time is reached, the simulation is ended; otherwise, return to step 3. By means of the method, the simulation precision is guaranteed, and meanwhile high speed simulation calculation of the photovoltaic cell model is achieved, so that the foundation for conducting real-time simulation to a photovoltaic power generation system which is based on smaller simulation step sizes is laid.

Description

technical field [0001] The invention relates to a photovoltaic battery model design. In particular, it relates to a method for designing a real-time simulation model of photovoltaic cells based on FPGA. Background technique [0002] Solar photovoltaic power generation is also called photovoltaic cells. Photovoltaic cells have the advantages of simple structure, small size, clean and noiseless, high reliability, and long life. They have developed rapidly in recent years. According to the different materials used, photovoltaic cells can be divided into silicon photovoltaic cells, compound photovoltaic cells, organic semiconductor photovoltaic cells and other types. At present, silicon-type photovoltaic cells are the most widely used, which can be divided into monocrystalline silicon, polycrystalline silicon and amorphous silicon thin-film photovoltaic cells. Among them, monocrystalline and polycrystalline silicon photovoltaic cells have high photoelectric conversion efficien...

AI Technical Summary

Problems solved by technology

[0004] FPGA essentially has a fully configurable inherent hardware parallel structure, and its logic resources can be configured as many parallel processing units to achieve multi-level highly parallel computing; at the same time, FPGA chips have a large number of embedded block RAMs, which can be configured as a large number of distributed ROMs Or RAM, its data and address width, and the number of ports can be configured, while the memory and bus in traditional real-time simulators are mostly shared, and the ports are limited, which limits the efficiency of data transmission; FPGA allows the use of pipeline technology, which strengthens data processing Efficiency, and FPGA also has a large number of internal connections with extremely fast transmission speeds, which will not introduce excessive communication delays

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