Review of Research on New Energy Ramp Events

With the massive access of new energy represented by wind power and photovoltaic to the power system, the new energy ramp events on the secure and stable operation of the power grid have brought huge challenges. The ramp events are reviewed from four aspects: the causes, definitions, prediction methods and evaluation indicators of ramp events. Firstly, the causes of wind power ramp events(WPRE) and solar power ramp events(SPRE) are analyzed, and the common definitions, advantages and disadvantages of ramp events are compared. Then, according to the form of prediction results, the methods of deterministic ramping prediction and uncertain ramp prediction are summarized. On this basis, the commonly used ramp evaluation indexes are summarized. Finally, the prediction of new energy ramp events is prospected.