Review on Renewable Energy Source Fault Characteristics Analysis

The increase of renewable energy sources (RESs), especially wind power and photovoltaic, is bringing different fault features to the power system compared with the traditional synchronous generator, resulting in the urgent need for precise fault analysis. According to the sequentially activated fault features, the short circuit characteristics of RES can be divided into three fault stages. Within the staged framework of fault duration, the published research is reviewed to provide a systematic analysis of RES fault characteristics. It's concluded that the hardware parameter determines the sub-transient fault features of RES, whereas RES control begins to dominate during the following transient stage. However, the neglection of voltage transition and unavailable RES output phase shall impede the application of the analytical conclusions in protection design. To solve the existing problems, interaction among RES and networks must be figured out. Therefore, the fault calculation of the integral RES-grid system is offered as the research prospect.