关键词: 入库流量, 水位跳变, 数据过滤, 水量平衡, 水调系统, 三岔河水库

Abstract: Water balance algorithm is widely used in reservoir inflow calculation. But it’s easily become sawtooth oscillation caused by water level fluctuation. This paper compares several kinds of methods commonly used in handling this problem and analyzes the influence of abnormal water level fluctuate to the algorithm of reservoir inflow. Then a new method of filtering the water level jump problem based on the water balance algorithm is put forward. The new method uses the maximum outflow of reservoir as a benchmark, and reversely calculates the maximum decline of water level according to water balance model to determine whether the new water level jump is abnormal. The identifying threshold value of algorithm can adaptively adjust according to the characteristics and water level of reservoir, which can make the identifying more accurate. Sanchahe hydropower reservoir is taken as an example, the water jump process and influence of the algorithm on the reservoir inflow are analyzed. The results show that the algorithm can effectively filter abnormal small water level jump, reduce the sawtooth shape of reservoir inflow profile.

Key words: reservoir inflow, water level jump, data filter, water balance, reservoir dispatching system, Sanchahe hydropower reservoir