Global optimization method for control parameters of photovoltaic power generation system

Abstract

The invention provides a global optimization method for control parameters of a photovoltaic power generation system. The method comprises the following steps: firstly, an established differential-algebraic equation of a photovoltaic plant power generation system is linearized at a steady-state value to obtain a state matrix used for analyzing the small disturbance stability of the system; then the influence on the system small disturbance stability of the system caused by control parameters is analyzed by calculating the eigenvalue, the damping ratio and participation factors of the state matrix to further determine the reasonable variation range of the control parameters; and finally, a quantitative model is introduced to serve as a parameter optimization objective function and the optimization algorithm is utilized to achieve global optimization of the control parameters of the photovoltaic plant power generation system. According to the invention, as for the small disturbance stability of the system, a scientific and reasonable quantification standard is established, and the problem of difficult single optimization due to mutual coupling of the system control parameters is solved. By adopting the method for parameter optimization, global optimization of the control parameters can be realized, and the small disturbance stability of the photovoltaic plant power generation system is improved.

Description

technical field [0001] The invention relates to a method for global optimization of control parameters of a photovoltaic power generation system. Background technique [0002] With the continuous development of photovoltaic power generation technology, its impact on traditional power grids has expanded from simple local voltage fluctuations, harmonic pollution, output power instability, etc. aspect. At present, the existing research mainly focuses on the model establishment and control strategy design of a single component, and there are relatively few studies on the interaction between photovoltaic power generation and power system. Therefore, it is of great significance to study the stability of large-scale photovoltaic access power systems. [0003] At present, there are few studies on the stability of large-scale photovoltaics connected to the power system. They mainly focus on the model establishment and control strategy design of a single component, and have not esta...

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Problems solved by technology

[0005] The present invention provides a method for global optimization of photovoltaic power generation system control parameters to solve the problem of the randomness of control parameter design in traditional power generation systems, the lack of scientific and reasonable quantitative design standards, and the inability to provide global optimization for the characteristics of system parameter coupling. The problem with parameter combinations

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