Characteristics analysis and power quality regulation capability assessment of distributed photovoltaics system

This paper constructs an equivalent circuit model for distributed photovoltaic systems, on which the power-voltage (P-V) characteristics are analyzed, including the impact of solar radiation intensity temperature on photovoltaic power output. Further, this paper proposes a new modeling method for the uncertainty of distributed photovoltaic regulation capability based on zonotopes. It analyzes and verifies the scenarios where distributed photovoltaic systems are independent of each other and where they are related to each other. On this basis, a model for evaluating the regulation capability of electric power quality for distributed photovoltaic systems is established, and a case study is conducted. The results show that model ing distributed photovoltaic systems using zonotope helps to assess the range of electric power quality regulation capability under multiple uncertain conditions.