Photovoltaic model establishment method applicable to dynamic overall-process simulation of power system

Abstract

The invention relates to a photovoltaic model establishment method applicable to the dynamic overall-process simulation of a power system. A photovoltaic generation module is modeled, a temperature factor and an illumination intensity factor in the medium and long-term process have the characteristics of fluctuation and indeterminacy, and an implementation method of a photovoltaic maximum power tracing model for the dynamic overall-process simulation of the power system is provided in consideration of the influence on photovoltaic generation caused by the change of the two factors. The photovoltaic maximum power tracing model adjusts the working voltage of a photovoltaic cell panel according to the volt-ampere characteristics of a photovoltaic power supply by using a maximum power point tracing control method, so that the photovoltaic cell panel can work in a maximum power output state, solar energy is utilized to the greatest extent, and the efficiency and performance of the photovoltaic generation are effectively improved. An inverter effectively controls the injection current of axes d and q by virtue of an inner ring current control loop and an outer ring current control loop, so that active power and reactive power can be controlled. The whole model meets requirements for electromechanical transient overall-process simulation and medium and long-term dynamic overall-process simulation of the power system.

Description

technical field [0001] The invention relates to a modeling method in the field of electric power system, in particular to a photovoltaic model modeling method suitable for dynamic simulation of the whole process of electric power system. Background technique [0002] The whole process dynamic simulation program can have a good simulation effect on the electromechanical transient state and medium and long-term dynamics of the power system. The detailed modeling of the photovoltaic power generation system in the whole process dynamic simulation program can reflect its influence on the transient process, It can also reflect its impact on the medium and long-term process, and the modeling work is of great significance. [0003] Since 2005, my country's photovoltaic industry has developed rapidly. From 2007 to 2010, my country's photovoltaic cell production ranked first in the world for four consecutive years. In 2010, the newly installed photovoltaic power generation capacity ...

AI Technical Summary

Problems solved by technology

[0005] Most of the existing photovoltaic models use the model of a single photovoltaic panel to be equivalent to the model of the entire photovoltaic power plant, which cannot reflect the changes in the structure and parameters of the photovoltaic array caused by changes in external conditions such as non-uniform illumination.

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