Abstract: Improper connection between medium and long-term trading energy and short-term power generation scheduling is a key problem that may cause structural water abandonment or power shortage. How to decompose the 96-point curve of trading energy is crucial for the power generation scheduling of high-proportion hydropower grids. This study develops a new method for short-term power generation scheduling based on the decomposition of energy curve and a practical project of the Yunnan power grid, applies power station classification strategy in determination of the standard load curve in sequence, and formulates a decomposition method of daily energy that couples with standard load curve and considers fairness. And aiming at minimizing the relative deviation from the planned decomposition energy completion degree, we integrate the check strategies for hydropower station restricted area and power grid transmission section, and optimize iteratively the initial decomposition curve to quickly obtain a feasible power generation process of power stations. This method is verified using examples of short-term scheduling of the power grid, and the results show it can effectively reduce the deviation of implemented generation scheduling, satisfying the practical and timely requirements of generation scheduling for high-proportion hydropower grids.

Key words: energy decomposition, high-proportion hydropower, short term, power generation scheduling, standard load curve