2 results about "Hydro turbines" patented technology

This invention relates to the field of hydropower technology, specifically to a method for diagnosing acoustic faults in hydro turbines based on CRK-enhanced CNN-GRU and dual-channel self-attention. The method includes: S1 deploying noise sensors near the turbine runner to collect acoustic signals that avoid high-frequency interference; S2 segmenting the signal into 1024 data points per segment, analyzing the signal using Fast Fourier Transform (FFT) to extract time-frequency features such as peak amplitude and energy proportion in the 400-600Hz frequency band; S3 constructing CRK based on a Tent chaotic mapping-improved Runge-Kutta optimization algorithm to enhance global search capability and convergence speed; S4 constructing a CNN-GRU-dual-channel self-attention model to sequentially achieve local time-frequency feature extraction, temporal dynamic dependency modeling, and multi-dimensional feature enhancement; S5 optimizing model hyperparameters using CRK; and S6 training the model by dividing it into training and test sets, employing transfer learning when samples are scarce. This invention exhibits strong anti-interference capabilities, efficient hyperparameter optimization, and can accurately diagnose normal, early, and extended crack states of the turbine runner. It is suitable for scenarios with scarce samples and has high engineering practicality.

The invention is a cyclorotor whose wing gyration radius can vary to transition from a resting position to different working positions, thus significantly increasing its power while maintaining a small footprint when not in use or when low power is sufficient. The main applications are vehicles traveling on or in fluids, and means of producing electrical energy from the movement of a fluid, such as wind turbines or hydro turbines. Abstract figure: Figure 1