2 results about "Harmonic model" patented technology

This invention belongs to the field of harmonic analysis technology and provides a method and system for harmonic modeling of server clusters based on operating condition clustering. It acquires multi-dimensional operating condition parameters of a single server, preprocesses the acquired data, matches the preprocessed data with a preset equivalent operating condition class of server harmonic characteristics, calls the corresponding dedicated harmonic model, and superimposes them to obtain the harmonic model of the server cluster. If the operating condition parameters do not fall within the parameter range of any preset equivalent operating condition class, it is considered a newly added equivalent operating condition class, and the corresponding dedicated harmonic model is fitted to the dedicated harmonic model library. This invention achieves adaptive calculation of the server cluster harmonic model, reduces the computational complexity of the model, and improves the calculation speed and modeling accuracy.

The application belongs to the technical field of power system power quality analysis, and provides a harmonic modeling method for large-scale charging and discharging stations, including: collecting measured three-phase voltage signals and three-phase current signals in the historical operation of the large station, performing Fourier transform on the three-phase voltage signals and three-phase current signals according to the Nuttall window function, extracting voltage phasors and current phasors corresponding to each harmonic, then based on the voltage phasors and current phasors corresponding to each harmonic, constructing a harmonic coupling matrix model, and using n groups of measured harmonic voltage and harmonic current data, using a complex domain partial least squares method to solve the parameters of the harmonic coupling matrix model, finally introducing voltage similarity as a model updating criterion to dynamically update the harmonic coupling matrix model, and establishing a dynamic harmonic model suitable for different operating states. The application can significantly improve the accuracy and working condition adaptability of the harmonic modeling of the large-scale charging and discharging station by constructing the harmonic coupling matrix and dynamically updating.