Fast Tracking Method for Maximum Power Point of Photovoltaic Power Generation System

Abstract

The invention provides a method for quickly tracking the maximum power point of a photovoltaic power generation system. The method particularly includes enabling a control system to analyze voltages and currents which are outputted by a photovoltaic cell array and are detected in real time; computing output quantities by the aid of a maximum power point tracking (MPPT) algorithm; controlling a duty cycle of an IGBT (insulated gate bipolar transistor) in a BOOST drive circuit; changing characteristics of a load; outputting the maximum power of the photovoltaic power generation system. The control system comprises a current divider (1), a current divider (2), a first direct-current voltage and current detecting module (3), a PWM (pulse width modulation) drive module (5), a touch screen (6), a second direct-current voltage and current detecting module (7) and a controller (4) which are connected with one another by electric signals. The method has the advantages that a new working point can be quickly found under the perturbation condition of system parameters such as sunlight intensity and environmental temperatures, input power and output power can be analyzed and extracted in real time, and accordingly the maximum power point of the photovoltaic power generation system can be tracked and monitored.

Description

technical field [0001] The invention relates to the field of solar power generation, in particular to a method for quickly tracking the maximum power point of a photovoltaic power generation system. Background technique [0002] With the consumption of fossil energy, the world is facing an energy crisis. Energy is the basic driving force for economic and social development, but due to the limitation and uneven distribution of conventional energy, the energy supply in most countries in the world is insufficient and cannot meet the needs of sustainable economic development. Photovoltaic power generation technology and industry are not only an important supplement to today's energy sources, but also have the potential to become the main source of energy in the future. However, the cost of photovoltaic array is high, the conversion efficiency is low, the price is expensive, and the initial investment is relatively large. And its output power is easily affected by factors such ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a fast tracking method for the maximum power point of a photovoltaic power generation system in view of the limitations of the existing maximum power point tracking technology for solar power generation. Under changing conditions, dynamic fast tracking can be carried out to solve the scientific and technical problems of efficiently tracking the maximum power point

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