Distributed Photovoltaics User’s Definition Model Considering Power Control Characteristics

With the gradual increase in the scale of distributed photovoltaics connected to power system, especially the promotion of the whole county photovoltaics, the randomness and voltage tolerance capability of distributed photovoltaics have an increasing impact on power system security and stability. At this stage, industrial community and academic community have insufficient understanding of the characteristics of distributed photovoltaics, which will lead to inaccurate distributed photovoltaics models and insufficient simulation calculation accuracy. So this paper investigates the control characteristics of some distributed photovoltaics in practice, especially the voltage tolerance characteristics, and bulids the electromechanical transient models of distributed photovoltaics considering power control characteristics based on PSASP user’s definition module. The distributed photovoltaics user’s definition model established in this paper can realize the function of reducing and recovering the power according to the specified slope during the voltage drop or recovery, and the function of cutting machine can be simulated in this model. The accuracy and rationality of this model can be verified by the example in this paper.