Photovoltaic power generation stability analysis

The photovoltaic business of China has developed quickly in the past several decades, and the proportion of photovoltaic installed capacity is increasing day by day. Now, China has the largest scale of installed capacity of photovoltaic. For the production of solar power is sporadic and variable, the dynamic characteristics of the direct current (DC) distribution network will undergo profound changes, and its extensive grid link will pose significant obstacles to the electrical system's stability. This paper analyses the different types of disturbances that may cause stability problems in photovoltaic power generation systems and analyses the main influencing factors and the stability reactions of the two disturbances. Compared with the evaluation method of the stability of the photovoltaic power generation system under small signal disturbance and large signal disturbance, the respective stability improvement strategy is proposed according to the corresponding eigenvalue. Finally, according to the existing stability approach, the research direction of stability of photovoltaic systems is prospected.