Isolated type photovoltaic array simulator system based on calculation method

Abstract

The invention relates to an isolated type photovoltaic array simulator system based on a calculation method. The isolated type photovoltaic array simulator system based on the calculation method comprises a rectification module, an isolation module, an inverter, a sampling module, a control module, a drive module and a power module, wherein the rectification module is connected with the input end of the inverter through the isolation module; the input end of the sampling module is connected with the output end of the isolation module; the output end of the sampling module is connected with the input end of the control module; the output end of the control module is connected with the input end of the drive module; the output end of the drive module is connected with the isolation module; the power module is connected with the drive module and the control module. The isolated type photovoltaic array simulator system based on the calculation method provided by the invention adopts a ZVZCS (Zero Voltage Zero Current Switching) full-bridge circuit with isolation as a main circuit, so that the high-power operation and a broader voltage regulation range can be realized, the electric isolation protection for the inverter is realized, and a safety performance of the system is improved. The calculation method is adopted as a method for photovoltaic characteristic curve simulation, so that not only are the continuity and the accuracy of a simulated photovoltaic characteristic curve improved, but also a lot of storage spaces are saved.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic grid-connected power generation, in particular to an isolated photovoltaic array simulator system based on a calculation method. Background technique [0002] Solar photovoltaic grid-connected power generation has become the main method and research hotspot of solar energy utilization due to its advantages of renewable, low pollution, and easy transmission. , if a physical solar photovoltaic array is used as input, its light intensity, temperature and other factors lead to a long simulation debugging period, and many situations are not easy to simulate and other problems limit the debugging of photovoltaic grid-connected inverters. Since the photovoltaic array simulator can simulate the output of the solar characteristic curve under any temperature and light intensity in a short period of time, its development solves the above problems, greatly shortens the development cycle of photovoltaic g...

AI Technical Summary

Problems solved by technology

Since the voltage and current data in the look-up table method are all discrete values, if the discrete data is less, it is not conducive to the accurate simulation of the photovoltaic characteristic curve, especially in the maximum power point tracking (MPPT), which cannot meet the requirements for the current when the voltage changes slightly. The changing requirements; if there are more discrete data to meet the MPPT requirements, a large amount of storage space is required

When simulating different photovoltaic characteristic curves, using the look-up table method needs to discretize different curves and generate different corresponding tables for storage, and the required storage space is doubled

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