1 results about "Discrete time domain" patented technology

The application discloses an impedance automatic modeling method for a frequency-division offshore wind power system, which comprises the following steps: firstly, constructing a mathematical model of an element and linearizing the mathematical model to obtain a continuous time domain small signal model of the element, and discretizing the continuous time domain small signal model through trapezoidal integration to obtain a discrete time domain small signal model of the element; then, based on a correlation matrix and node analysis, converting the discrete time domain model at the element level to a system level model; finally, through z transformation and bilinear transformation, converting the discrete time domain model at the system level to a continuous frequency domain model at the system level, and realizing the above process through codes in a computer to automatically obtain the impedance of the system. The application replaces traditional manual symbolic derivation with numerical calculation, significantly improves the modeling efficiency, has good flexibility and expansibility, can be suitable for complex systems and new topological structures, provides an efficient stability analysis tool for the design and optimization of offshore wind farms and grid-connected systems, and can be extended to other renewable energy grid-connected systems containing multiple power electronic converters.