2021年5月15日 · Risk indicators were proposed for output shortage, power curtailment and spilled water. A two-layer nested approach was used to optimize the economic operation model. The …

One of the most important characteristic curves in the economic operation of hydropower plants is the turbine flow characteristic curve, which illustrates the law of fluctuation between the...

2023年12月15日 · The parameter Q i, t (N i, t, H t) denotes the water consumption flow of the i -th unit in the presence of load N i, t when the water head is H t. This factor can be evaluated from the fitted formula of the net head-discharge-output (NHQ) curve associated with the unit.

2024年11月24日 · The multi-point discrete optimization method is used to correct the NHQ curve, discharge curve and capacity curve of each power station. After correction, the interval flow fallacy rate obtained by the water affairs calculation module is shown in Table 5 below.

In this study, a deep reinforcement learning approach is proposed to improve the accuracy and efficiency of optimal load allocation and flood management. In this approach, the scheduling optimization problem is firstly transformed into a model-free multi-step decision problem based on Markov Decision Process (MDP).

2024年10月16日 · Determine the corresponding relationship between water level difference and load based on the NHQ curve, determine the benchmark coefficient of the PID model, and take into account the amplitude of the current outflow flow rate change of the superior power station, and make a correction to this coefficient.

Download scientific diagram | a, b, c NHQ curves under 3 water heads from publication: Application Research of the Improved Overall Temporal and Spatial Economic Operation Model Based on ...

2023年8月22日 · 找出与小水电群发电能力相关系数最大的水电站后，建立大小水电回归模型，实现了利用大水电区间流量预测值对地区小水电发电能力进行预测的方法，此方案的缺陷在于对水电站的发电能力预测不够精准。 技术实现思路. 1、本发明主要解决现有技术未能充分考虑库容式水电站的运行特性，导致在物理推导层面发电能力预测精准度不够的问题；提供基于nhq曲线的库容式水电站发电能力预测方法，实现对库容式水电站发电能力的精准预报。 2、本发明的上述技术 …

2018年2月26日 · The minimum up time and down time are both set as 4 h. The Load-flow characteristic curves (NHQ curves) of five kinds of hydro units under 3 gross water heads are demonstrated in Fig. 4.

2024年12月1日 · The NHQ curve is the abbreviation of the turbine characteristic curve in the region, which describes the relationship among output (N), head (H) and flow (Q). Qi+1 [sub.t,in] is the calculated inflow of the downstream reservoir numbered i + 1 at time t. ?