Calculation Method for Assessing Flexible Ramp-Up Demand in Power Systems with High Proportion of Renewable Energy

This paper presents an evaluation method for flexible climbing demand of power systems. Firstly, the flexible climbing demand of the system is described in detail, and based on the flexible climbing products, a joint clearing model of spot electricity energy market and flexible climbing auxiliary service is constructed. By solving the model, it can accurately evaluate and calculate the upward and downward flexible climbing needs of the system in each period, and determine the corresponding flexible climbing capacity provided by the system itself, and further evaluate and calculate the upward and downward flexible climbing capacity and capacity margin of the system in each period. Finally, this paper uses the data of a provincial actual power system for example analysis to verify the effectiveness and practicability of the proposed evaluation calculation method, which provides a strong decision support for the optimal scheduling of the power system, the effective consumption of new energy and the participation in the flexible climbing auxiliary service market trading.